JP3521138B2 - Display device and display control method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device including a plurality of display elements and a display control method.

[0002]

2. Description of the Related Art Display devices for displaying characters and images by arranging a large number of display elements such as LEDs in a dot matrix are used indoors or outdoors.

FIG. 19 is a view showing the arrangement of the display elements 12 of the conventional display device 11. In the conventional display device 11, a large number of display elements 12 are arranged in a matrix at a predetermined pitch a. In such a conventional display device 11, the resolution can be increased by increasing the number of display elements and shortening the pitch a.

[0004]

However, when the number of display elements of the display device 11 is increased, there is a problem that the cost becomes high. On the other hand, it is also required to satisfy a certain display quality or higher.

An object of the present invention is to maintain display quality without increasing the number of display elements.

[0006]

According to another aspect of the present invention, there is provided a display device comprising a plurality of display elements which are smaller than the number of display elements required to display an image having a resolution determined by display data .
And a display of at least said first sequence
Display elements can be displayed horizontally, vertically, or diagonally where there are no elements.
The display element of the second array in which the children are arrayed is the same as that of the entire screen.
When one display data is displayed for a predetermined display period,
During the display period that is part of the display period, the same display data
The display data of the position where the display element exists in the first and
And display on the corresponding display element of the second array,
During the remaining display period of the period, in the same display data
Display data of the position where the display element does not exist beside the position,
The first and second arrangements at adjacent positions in the vertical or diagonal direction
Display control means for displaying on the display element.

[0007] According to the present invention, to reduce the loss of Viewing data can achieve a higher quality display with a small number of display elements.

For example, odd-numbered columns and even-numbered columns are arranged every other display element, and even-numbered columns are arranged at positions where the odd-numbered column display elements do not exist and odd-numbered column display elements do not exist. By displaying the display data of No. 2 on the even-numbered display elements adjacent thereto, the lack of the display data is not conspicuous, and a constant display quality is maintained with a small number of display elements (in this case, half the number of display elements). be able to. The array of display elements is not limited to every other array, and the intervals of the display elements may be different between the odd-numbered column and the even-numbered column.

According to a second aspect of the invention, the display control means is
Even number of columns in the same column or row when displaying images in a floating manner
Or display the same display data for one of the odd numbered display
The same as above in the first quarter of the display period
Presence of the display element in the current column or row in the display data of
The display data of the position not to be displayed in the previous column or row
Display on the display element adjacent to the position,
During the period, the current column or row in the same display data
Display data of the position where the display element of
Display the same on the element during the third quarter period.
The presence of the display element in the current column or row in the display data
The display data of the position to be displayed on the corresponding display element.
In the 1 / 4th period, the same as the 1st period
Display element of the current column or row in the same display data
Display data at a position that does not exist in the previous column or row
Display on the adjacent display element at the position, and
The other display of the odd-numbered stage is the first display in the display period.
Of the same display data in the 1/4 period of
The display data of the position where the display element in the column or row exists is
Display on the corresponding display element, and the second quarter period
The table of the current column or row in the same display data
The display data of the position where the display element does not exist is displayed in the previous column.
Or display on an adjacent display element at the position of the row,
In the third quarter period, as in the second period, the current
The display data in the position where the display element in the current column or row does not exist
The adjacent display element at the position in the previous column or row.
Display to the child, and in the fourth quarter period, the first
There is a display element in the current column or row as in the eye period
The display data at the corresponding position is displayed on the corresponding display element.

For example, a plurality of columns having the same arrangement order of the display elements is defined as a first array, and one or a plurality of columns in which the display elements are arranged in the lateral direction of the position where the display elements of the first array do not exist are designated as the first array. The display device is constructed by arranging the two arrays and arranging them in a plurality of columns. As a result, it is possible to reduce display data loss and realize a display with higher display quality with a smaller number of display elements.

In the above invention, the display elements may be arranged in a zigzag pattern. With this configuration,
Display data at positions where there are no display elements in the horizontal or vertical direction of the houndstooth grid can be displayed by the display elements arranged in the houndstooth grid, and a certain display quality can be secured with a small number of display elements. it can.

In the above invention, the display control means is 1
In the display period of the cycle, a period for displaying the display data of the position where the display element exists on the corresponding display element,
At least the period in which the display data at the position where the display element does not exist is displayed on the display element near the position may be shifted in time.

When displaying the display data at the position where the display element does not exist, a part of the display data at the position where the display element exists may be included and displayed. In this way, by displaying the display data at the position where the display element does not exist on the display elements in the vicinity of the display element, it is possible to prevent the display data from being lost when the number of display elements is reduced and improve the display quality.

In the above invention, the display control means is 1
In the display period of the cycle, the period in which the display elements in the odd rows or the odd columns are lit may be temporally shifted from the period in which the display elements in the even rows or the even columns are lit.

With this configuration, for example, the period in which the display elements in the odd rows are turned on and the period in which the display elements in the even rows are turned on are temporally shifted, and the lighting periods are averaged. It is possible to improve non-uniformity of display brightness for each column in a fluidized display or the like.

In the above invention, the display control means is 1
In the display period of the cycle, a period for displaying the display data of the position where the display element exists on the corresponding display element,
At least a period for displaying display data at a position where no display element exists on a display element near the position is provided, and a period for displaying display data at a position where the display element on the odd row or odd column exists and the even number. A period for displaying display data at a position where the display element in a row or an even column exists, or a period for displaying display data at a position where the display element in an odd row or odd column does not exist on a display device near the position. The display period of the display data in the position where the display element in the even row or the even column does not exist may be temporally shifted.

With such a configuration, for example, a period in which display data to be originally displayed on the display element in an odd-numbered row is displayed, and a display to be originally displayed in the display element on an even-numbered row is performed. Since the period for displaying data can be shifted in time, the lighting period of the display element in a specific column becomes longer, and uneven display brightness can be prevented.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an arrangement of display elements 22 of a display device 21 according to the first embodiment of the present invention.

In the first embodiment, the display element 2
Reference numeral 2 is an LED, arranged in a zigzag pattern, and the pitch of the display elements 22 in the vertical and horizontal directions is b. Display element 22
By arranging the display elements in a zigzag pattern, the number of display elements can be reduced to half as compared with the conventional display device 11 of FIG. 19 in which the display elements 22 are arranged in a matrix.

Next, FIG. 2 shows the display circuit 3 of the display device 21.
2 is a circuit block diagram of FIG. The video switching circuit 32 is
An analog video signal of a fluid display such as a video / moving image, a still image, and characters input from the outside is selected and output to the control unit 33 and the A / D conversion circuit 34.

The control unit 33 decodes the mode information indicating the type of the video signal selected by the video switching circuit 32, the vertical synchronizing signal (VSYNC) output from the video switching circuit 32, and the horizontal synchronizing signal. (HSYNC), a timing circuit 36 that generates a timing signal from a dot clock signal (DOTCLK) for writing or reading 1-dot data, a memory controller 37, and a transfer circuit that controls the display timing of the display board 39. The unit controller 38 includes a clock signal (SCK), a latch signal (LH) for latching one screen of display data, a display enable signal (BLANK), and a gradation clock signal (GSCK).

The memory control section 37 includes two memories (memory A) 40, a write signal (write enable signal) WEB for the memory (memory B) 41, a read signal (output enable signal) OEB, and a write for the memory 40. It is a circuit that outputs the read address A and the write or read address B of the memory 41.

The 8-bit data of R, G, B converted from analog to digital by the A / D conversion circuit 34 is written in the memory 40 or 41. And the memory 40,
The data read from one of the 41 is latched by the corresponding latch circuit 42, 43, and the latch circuit 42, 43
Is output from the display panel 39 to a moving image, a still image, a flow display, or the like.

Here, a more detailed structure of the memory controller 37 will be described with reference to FIG. The write address counter 51 uses the vertical synchronization signal VSYNC indicating the division of the display data for one screen, the horizontal synchronization signal HSYNC generated for each line of the display screen, and the dot clock signal DCLK based on the memory 40. , 41 for writing are generated.

Similarly, the read address counter 52 also has a vertical synchronizing signal VSYNC and a horizontal synchronizing signal HSYNC.
A read address is generated based on C and the dot clock signal DCLK and output to the address rearrangement circuit 53.

The address rearrangement circuit 53 converts the address output from the read address counter 52 and, for example, the address of the position where the display element 22 is present is used as the read address in the first half of the display period of one cycle. It outputs to the multiplexers 59 and 60, and outputs the address of the position where the display element 22 does not exist to the multiplexers 59 and 60 as a read address in the latter half period.

Write enable signal generation circuit 54
Is a circuit for generating a write signal (write enable signal) WE for the memories 40 and 41, which is synchronized with the vertical sync signal VSYNC or the horizontal sync signal HSYNC output from the OR gate 55, and which is the dot clock signal DCL.
The write signal WE is output at the timing synchronized with K.

The read clock signal generation circuit 56 is
Vertical sync signal VSYNC and dot clock signal DCLK
Based on the above, the transfer clock signal SCLK used for transferring the display data is generated inside the display panel 39.

The V-cycle switching signal generation circuit 57 generates a V-cycle switching signal (for example, a signal whose sign is inverted every V cycle indicating a display period of one screen) based on the vertical synchronization signal VSYNC.

The A / B selector 58 outputs a selection signal for instructing one of the multiplexers 59 and 60 to write the display data based on the V cycle switching signal output from the V cycle switching signal generation circuit 57. Then, a selection signal instructing to read the display data is output to the other of the multiplexers 59 and 60.

The multiplexers 59 and 60 have A / B
A selection signal output from the selector 58, a write address output from the write address counter 51, a read address output from the address rearrangement circuit 53, and a write enable signal output from the write enable signal generation circuit 54. WE is inputting.

The multiplexer 59 is the A / B selector 5
When a selection signal instructing writing to the memory (memory A) 40 is input from the memory 8, the write address output from the write address counter 51 is used as the memory 4
A write address A of 0 is output, and at the same time, a write enable signal (A write enable signal) WEA is output. As a result, the digital display data output from the A / D conversion circuit 34 is written in the memory 40.

When the A / B selector 58 outputs a selection signal instructing reading from the memory 40, the multiplexer 59 outputs the address rearrangement circuit 53.
The read address output from the memory is output as the read address A of the memory 40, and at the same time, the read enable signal (A read enable signal) OEA is output. As a result, the display data stored in the memory 40 is sequentially read and output to the latch circuit 42.

The multiplexer 60 includes the A / B selector 5
When a selection signal instructing reading from the memory (memory B) 41 is output from 8 (at this time, a selection signal instructing writing of display data to the memory 40 is output to the multiplexer 59). The read address output from the address rearrangement circuit 53 is output as the address B of the memory 41, and at the same time, a read enable signal (read enable B signal) OEB is sent to the memory 41.
Is output.

Further, the multiplexer 60 outputs the display data from the memory 40 to the multiplexer 59 when the selection signal instructing the writing of the display data to the memory 41 is output from the A / B selector 58. A selection signal for instructing that the write address is output from the write address counter 51 as the write address B of the memory 41,
At the same time, the write enable signal WEB is output to the memory 41.

The memory 4 is controlled by the memory controller 37.
Display data for one screen is written in 0, 41, display data at the position of the display element 22 is read from the memory 40 or 41 in the first half period of the 1V display period, and in the latter half period of the 1V display period. The display data at the position where the display element 22 does not exist is read. Then, the display data is output to the display board 39 and the image is displayed.

Here, each display element 22 of the display board 39 is
The correspondence relationship between the addresses assigned to the addresses and the addresses of the memories 40 and 41 will be described with reference to FIG. Figure 4
Shows an example in which the display panel 39 is composed of 10 × 10 display elements 22. “00”, “01” in order to the right with reference to the display element 22 in the upper left corner of the display board 39.
..Addresses of "09" are assigned, and thereafter, from the display element 22 at the left end of the second line to the right, "10" and "1" in order.
1 ”... Addresses are assigned. It should be noted that addresses surrounded by circles in the figure indicate positions where the display element 22 exists, and addresses not surrounded by circles indicate positions where the display element 22 does not exist. The display elements 22 are arranged in a zigzag pattern.

A display unit 39 is provided in the memories 40 and 41.
The display data having gradation is stored in correspondence with the address. Therefore, for example, the addresses “00” and “0
2 ", ..., By reading out every other address, the display data at the position where the display element 22 is present,
Alternatively, by reading every other address such as the addresses “01”, “03”, ...
It is possible to read out the display data at the position where is not present.

Next, the writing of the display data to the memories 40 and 41 and the timing of reading the display data from the memories 40 and 41 will be described with reference to FIG. The display device 21 writes display data (video data) to the memory (A) 40 and the memory (B) 41 at a cycle of 1 V in which the vertical synchronizing signal VSYNC goes low and then goes low again. They are alternating.

First, the case of writing to the memory (A) 40 will be described. In this case, in the display data write, the write enable signal WEA and the write address A are sequentially output from the memory control unit 37 to the memory 40 during the period of 1V, and the display data for one screen is written. At this time, in parallel, the output enable signal OEB and the display element 22 are sent from the memory control unit 37 to the other memory 41 in the first half period of the 1 V period.
The address of the position where the display element 22 exists is output as the read address B, and the address of the position where the display element 22 does not exist is output as the read address B in the latter half period.

In the next 1 V period, the write enable signal WEB and the write address B are sequentially output from the memory control unit 37 to the memory (B) 41 which has been read in the immediately preceding cycle, and 1 The display data for the screen is written. At this time, in parallel, to the other memory (A) 40, the output enable signal WEA and the address of the position of the display element 22 are output in the first half period of the 1 V period, and the display element 22 is output in the latter half period. The address of the position that does not exist is output.

By these operations, the memory 40 or 4
The display data for one screen is alternately written in 1 and the display data of the addresses corresponding to the first half and the second half of the display period of 1V are read from the other of the memory 40 or 41 in parallel.

Next, with reference to FIG. 6, description will be given of a case where the display device 21 having the above-mentioned configuration divides the 1V display period into two display periods for display. In the first data transfer period, the memory controller 37 causes the display element 2 to
The read address (for example, addresses “00”, “02”, “04” ...) At the position where 2 exists is the memory 4
0, and the display data “FF”, “FB”, ... At the position where the display element 22 exists is read from the memory 40. The display data read from the memory 40 is transferred inside the display board 39 at a timing synchronized with the transfer clock signal SCK, and these display data are latched by the driver inside the display board 39 and are transferred in the second data transfer period. It is displayed (period (I) in FIG. 6). That is, 1 of 1V
The display data displayed in the period (I) of / 2 is 1 in FIG.
The display data having the gradation transferred during the th data transfer period becomes "FF", "FB", ....

In this example, the first data transfer period is the first write to the memories 40 and 41, and since there is no display data in the memories 40 and 41 before that, the first data transfer period Display panel 39
Does not display anything.

Next, in the second data transfer period, the address of the position where the display element 22 does not exist is read from the memory control unit 37 (for example, the address "01",
"03", "05" ...) are output, and the display element 2
2 display data of a non-existing position (for example, "FD",
[F9] ...) Is read from the memory 40 or 41. The display data read from the memory 40 or 41 is displayed on the display panel 39 during the third data transfer period (period (II) in FIG. 6).

That is, the remaining 1/2 period of 1V (I
The display data displayed on the display panel 39 in I) is 2 in FIG.
The display data having the gradation transferred in the second data transfer period becomes "FD", "F9", ....

Next, in the third data transfer period, the read address (for example, the address "00", "02", etc.) of the position where the display element 22 exists from the memory control section 37.
"04" ...) is output to the memory 40, and the display element 2
Display data “FF”, “FB”, at the position where 2 exists
.. is read from the memory 40. The display data read from the memory 40 is transferred inside the display board 39 at a timing synchronized with the transfer clock signal SCK, and these display data are latched by the driver inside the display board 39 and are transferred in the second data transfer period. It is displayed (second period (I) in FIG. 6).

Next, in the fourth data transfer period, the address of the position where the display element 22 does not exist is output from the memory control section 37 as the read address, and the display element 22 is displayed.
The display data of the position where no is present is read from the memory 40. The display data read from the memory 40 or 41 is displayed on the display panel 39 during the next fifth data transfer period (second period (II) in FIG. 6).

In FIG. 7, one cycle of the display period (1 V period) is divided into the first half period and the second half period, and the display data of the position where the display element 22 exists is displayed in the first half period (I). FIG. 7 is a diagram showing a display state when displaying display data at a position where the display element 22 does not exist in the latter half period (II).

In FIG. 7, a small white circle indicates the display element 22.
Among them, the non-lighted state is shown, and the large white circle shows the lighted state. Further, the triangle mark indicates the display position of the display data to be displayed at the position where the display element 22 does not exist.

FIG. 7A shows display data for one screen input to the display device 21, and this display data is written in the memory 40 or 41. FIG.7 (b) is
The display state in the first half of the display period of one cycle (period (I) in FIG. 6), that is, the display state when the display data at the position where the display element 22 exists is shown.

FIG. 7C shows the display state in the latter half of the 1-cycle display period (period (II) in FIG. 6). In this display period, display data at a position where the display element 22 does not exist (display data at a position indicated by a triangle in the figure) is displayed on the display element 22 at the position immediately before the address, that is, on the left side of the position to be displayed. It is displayed on the display element 22 (when viewed from the front).

FIG. 7D shows the display period (1
It is a figure which shows the synthetic image of the period (V), ie, the period (I) and the period (II). In this first embodiment, FIG.
An image when the display data of the position of the display element 22 shown in FIG. 7B is displayed and the display data of the position where the display element 22 does not exist shown in FIG. 7C is displayed on the display element 22 adjacent to the left. The images of are combined and displayed. Therefore, since the input video data shown in FIG. 7A can be displayed without being lost, the display quality is almost reduced by the number of display elements 22 smaller than the number of display elements required to display the video data. It can be displayed without.

Next, FIGS. 8 and 9 are views showing the display state of the second embodiment of the present invention in which the display period of one cycle is divided into three and displayed. The configuration of the display circuit 31 of the second embodiment is basically the same as that of the second embodiment described above. The difference is that the memory control unit 37
Is a read address for designating the original position where the display element 22 exists, a read address for display data to be displayed horizontally 1 dot at the original position, and a position 1 dot above the original display position in the vertical direction. It has the function of displaying on the display element 22 and outputting the read address of the display data.

FIG. 8A shows video data input to the display device 21. FIG. 8B shows the first 1 / th of the display period of one cycle for displaying the display data for one screen.
The display state of the period 3 (this is called period (I)) is shown. In this period (I), the display data to be displayed at the position of the display element 22 is the display element 2 at the original display position.
It is displayed in 2.

FIG. 8C shows the display state during the second 1/3 period (this is called period (II)). In this period (II), each display data is displayed on the display element 22 on the left side of one dot at the position to be originally displayed. That is, the display data at the position indicated by the triangle in FIG. 8C is displayed on the display element 22 on the left side of the one dot.

FIG. 8D shows the display state in the third 1/3 period (this is called period (III)).
In this period (III), each display data is displayed on the display element 22 which is one dot above the position to be originally displayed in the vertical direction.

FIG. 9 is a diagram showing a composite image in the periods (I) to (III). In this second embodiment, FIG.
An image when the display data of the position of the display element 22 shown in (b) is displayed, and the display data of the position where the display element 22 does not exist shown in FIG. 8C is displayed on the display element 22 adjacent to the left. 8D and the display data at the position where the display element 22 shown in FIG. 8D does not exist are combined and displayed on the display element 22 on the upper side in the vertical direction. In this case, since the display data at the position where the display element 22 does not exist is displayed on the display element 22 on the left side, the side, and the vertical side of the display data, the original image can be displayed without losing the display data. It is possible to display with a small number of display elements without deteriorating the display quality of.

Next, FIG. 10 is an explanatory diagram for displaying an image in a fluidized manner. The display example of FIG. 10 is a case where, when display data for turning on all the display elements 22 in the center row of the three rows is input, the display is flowed in the left direction.

Similarly to the case of displaying the above-mentioned video data, when displaying one screen of the fluid display, the period of one cycle for displaying one screen of the fluid display is divided into two, which is a half period. The display data of the display element 22 in the column (the central column in FIG. 10) is displayed, and the display data in the position where the display element 22 in the column does not exist is displayed for one dot on the right side of the display element 22 in the remaining half period. To display.

Taking the display elements 22 in the three columns in FIG. 10 as an example, the display elements 22 in the middle row of the three columns are displayed in the first half of the display period (1 V period) of the first one cycle. Power display data is displayed, and in the latter half period, the display data at the position where the display element 22 in the central column does not exist (the position indicated by the triangle mark in the central column in FIG. 10) is originally displayed in the right column. The image is displayed on the display element 22 on the right of the power position.

In the first half of the display period of the next one cycle, the display data of the position of the display element 22 in the left column is displayed, and in the latter half of the display period, the display data of the position where the display element 22 in the left column does not exist is displayed. The display data is displayed on the display element 22 on the right side of the position to be originally displayed in the column on the right side thereof.

In this way, the display data of the position where the display element 22 exists is displayed during the half of the display period of one screen, and the display data where the display element 22 does not exist is displayed during the remaining half period. By displaying the data on the display element 22 next to the position to be originally displayed, the image can be displayed while maintaining a constant display quality with a smaller number of display elements than the number of display elements originally required to display the image. It can be displayed as a flow.

The numerical values "1" and "2" shown as moving pixels in FIG. 10 are, for example, the amount of movement of the display position when switching the display from the column to the column of 1 dot (display element 1 Or the amount of movement of the display position when the display is switched from the column of to the column of'is 2 dots.

Next, FIG. 11 is an explanatory view of the fluidized display according to the third embodiment of the present invention in which the display order is made different between the odd-numbered stage and the even-numbered stage when the image is displayed in the fluidized state. In the display control method shown in FIG. 10 described above, in the latter half of the first 1V display period, the display elements 22 in the column of FIG. 10 are turned on, and in the first half of the next 1V display period, the column of '′ of FIG. The display element 22 is turned on. Therefore, since the display position for two dots is moved from the row of FIG. 10 to the row of ', there is a possibility that the fluidized display may not be performed smoothly.

FIG. 11 is an explanatory view of the flow display of the third embodiment in which the point is improved. Similarly to FIG. 10, FIG. 11 also shows a case where the display of the central three columns is fluidly displayed in the left direction.

In the third embodiment, one screen display period is divided into four periods to display one column of display data in four periods, and an odd number of rows (in this case, odd rows, vertical flow). In the case of display, the display order of the odd-numbered columns) and the even-numbered stages (also including the even-numbered columns) are different. That is, as shown in FIG. 11, the odd-numbered stages turn on the display element 22 in the right column in the first quarter of the display period of one cycle, and in the middle of the next quarter, The display element 22 in the column is turned on, the display element 22 in the same central column is turned on in the third quarter period, and the display element 22 in the right column is turned on in the last fourth quarter period. It lights up.

For even-numbered stages, the display element 22 in the central column is turned on during the first 1/4 period and the second 1 /
During the period of 4, the display element 22 in the right column is turned on and 3
The display element 22 in the same right column is turned on in the fourth quarter period, and the display element 2 in the middle column is turned on in the fourth quarter period.
2 is lit.

The display control method for odd and even stages will be described in more detail below. First, the display order of odd-numbered stages will be described. In the odd-numbered display, the display data at the position where the display element 22 in the center column does not exist (the position indicated by a triangle in FIG. 11) is displayed on the right side in the first quarter of the display period of one cycle. The display element 22 on the right of the position to be originally displayed in the column is displayed. In the next second quarter, the data to be displayed on the display element 22 in the central column is displayed on the display element 22.

In the next third quarter period, the same display data is displayed on the same display element 22 in the central column.
In the last fourth quarter, the display element 2 in the middle column
The display data of the position where 2 does not exist is displayed on the display element 22 on the right of the position to be displayed in the right column.

In order to display the display data of the central column in a floating manner, in the next 1V period (the display period of the next one cycle), the display element in the column of the left column is in the first 1/4 period. The display data of the position where 22 does not exist is displayed on the display element 22 on the right side of the position to be originally displayed in the center 'column. During the second ¼ period, the display data of the display element 22 on the left side “column” is displayed on the display element 22 at the position that should be originally displayed on the “row”.

In the next third quarter period, the same display data as described above, that is, the display data to be displayed on the display element 22 in the left column is displayed on the same display element 22. During the fourth 1/4 period, the display data at the position where the display element in the left column'is not present is displayed on the display element 22 on the right side of the position to be originally displayed in the center'column.

Next, the display of even-numbered stages will be described. In the even-numbered display, the first 1/4 of the display period for one screen
During the period, the display data to be displayed is displayed on the display element 22 in the center column. In the next second quarter,
The display data at the position where the display element 22 in the central column does not exist is displayed on the display element 22 on the right of the position to be originally displayed.

In the next third quarter, the above display data is displayed on the same display element 22. The display data to be displayed on the display element 22 in the center column is displayed on the display element 22 in the last fourth quarter.

In the first 1/4 period of the next 1V period (display period of the next 1 cycle) of the even-numbered stages, the display data to be displayed on the display element 22 in the left column 'is originally displayed. The display element 22 should display. During the second ¼ period, the display data at the position where the display element 22 on the left column does not exist is displayed on the display element 22 at the position on the right of the position to be originally displayed.

In the next third ¼ period, the above display data is displayed on the same display element 22, that is, the display element 22 on the right side of the position to be displayed in the center 'column. In the fourth 1/4 period, the display data to be displayed on the display element 22 on the left column is displayed on the display element 22.

In FIG. 11, "1" and "0" of the moving pixels indicate that the amount of movement of the display position when the display element of the column is turned on and the next column is turned on is 1 dot, It is indicated that the amount of movement of the display position when the second row is turned on and then the second row is turned on is 0 dot. This also indicates that the amount of movement of the display position is small.

The display control method of the third embodiment is
In the flow display, the display period of one screen is divided into four, the display data at the position where the display element 22 does not exist is displayed on the display element 22 in the vicinity thereof, and the odd-numbered and even-numbered display orders are different. . As a result, the amount of movement of the display position when displaying the flow or the amount of movement of the display position when switching from one screen to the next can be reduced, and a smoother flow display can be realized. Furthermore, by making the display order of the odd-numbered and even-numbered display elements 22 different, it is possible to prevent the display time of a specific column or row from becoming long and the luminance from becoming non-uniform for each column or row.

Next, FIGS. 12 and 13 show the address of the display element 22 and the memory 4 when an image (including characters) is displayed by changing the display order of the odd-numbered column and the even-numbered column.
It is a figure which shows the relationship with the address of the display data read from 0,41. Further, FIG. 14 is a diagram showing an example of the display at that time.

The display board 39 of the third embodiment is shown in FIG.
As shown in (A), it is composed of 10 × 10 display elements 22, and addresses “00” to “99” are sequentially allocated in the right direction with the upper left corner of the display board 39 as a reference point. Addresses circled in FIG. 12A indicate positions where the display element 22 exists, and addresses not circled indicate positions where the display element 22 does not exist.

During the first ¼ period of the 1V display period, the odd number of stages is changed from the memory control unit 37 to the memory 4.
With respect to 0 or 41, the address of the position where the display element 22 exists is output, and the display data designated by the address is read and displayed on the display panel 39.

For even-numbered stages, the memory controller 37 outputs the address of the position where the display element 22 does not exist,
The display data designated by the address is read out, and the display data is displayed at a position on the left side of one dot at the position where it should be displayed. The control for displaying at a position to the left and one dot of the original display position is performed by a drive circuit inside the display panel 39. For example, by sequentially shifting the input display data, the corresponding position of the houndstooth grid is changed. It is displayed on the display element 22.

FIG. 12B shows the original address of the display data displayed on the display board 39 at this time. The original display data is displayed at the positions designated by the respective addresses on the odd-numbered display elements 22 of the display board 39,
The display data of the address on the right side of the dot is displayed on the display elements 22 in the even-numbered stages. That is, in the even-numbered stage, the display data at the position where the display element 22 does not exist is displayed on the display element 22 at the left side position.

During the next ¼ period of the 1 V display period, the address of the position where the display element 22 does not exist is output from the memory control unit 37 for the odd-numbered stages, and the display data designated by the address is read. Then, it is displayed and displayed on the display element 22 on the left side of the display panel 39.

For the even-numbered stages, the memory controller 37 outputs the address of the display element 22 to the memory 40 or 41 to read the display data, and the display panel 39 is originally placed at the position designated by these addresses. The display data of is displayed.

FIG. 13 shows addresses of the display data displayed on the display board 39 at this time. The display data of the address on the right side of the dot is displayed on the display elements 22 in the odd-numbered stages of the display board 39, and the original display data designated by the respective addresses is displayed on the display elements 22 in the even-numbered stages. . That is, in the odd-numbered stage, the display data at the position where the display element 22 does not exist is the display element 22 on the left side of the one dot.
Is displayed in.

FIG. 14 is a diagram showing a display example of the above-described third embodiment in which the display order of the columns of display data is different between the even-numbered stage and the odd-numbered stage. When the image shown in FIG. 14A is displayed in a fluidized manner, the first quarter of the 1V display period is displayed.
14B, as shown in FIG. 14B, the display data to be originally displayed is displayed on the odd-numbered display elements 22, and the even-numbered display elements 22 do not include the display element 22. Display the display data at the position.

In the second 1/4 period, as shown in FIG. 14C, the display data at the position on the right side of one dot is displayed on the odd-numbered display elements 22 and the even-numbered display elements 22 are displayed. The display data that should be displayed at that position is displayed.

The third quarter period is displayed under the same conditions as the second period, and the fourth quarter period is displayed under the same conditions as the above first period. As a result,
As shown in FIG. 4 (d), an image similar to the original image to be displayed (FIG. 14 (a)) can be fluidly displayed by the human eye with a small number of display elements arranged in a grid pattern.

That is, in the same display period in which the display is divided into 1/4, the display data at the position that should be originally displayed is displayed on one of the odd-numbered and even-numbered display elements 22, and the other of the odd-numbered and even-numbered stages is displayed. Since display data is displayed on the display element 22 in the vicinity of the position to be originally displayed on the display element 22, the dropout of the display data is reduced in the case of the flow display, and the lighting period of a specific column or row is further reduced. It can be improved that the display becomes longer and the display is not uniform. Further, it is possible to realize a smoother fluidized display by reducing the movement amount of the display position in the fluidized display.

Next, FIG. 15 is a view showing the arrangement of the display elements 22 according to the fourth embodiment of the present invention. In this embodiment, the display elements 22 are thinned out one by one in the horizontal, vertical and diagonal directions in the staggered arrangement of the first embodiment.

In FIG. 15, a solid line indicates a position where the display element 22 exists, and a dotted line indicates a position where the display element 22 does not exist. When the pitch between the display elements 22 when the display elements 22 are arranged in a dot matrix is a, the horizontal and vertical pitches in this case are 4a, and the diagonal pitch is one display element 22 in the diagonal direction. It becomes the length.

In this case, since the display elements 22 are thinned out in the diagonal direction, there are columns or rows in which the display elements 22 do not exist at all in one column or one row. For example, in FIG.
Since the display element 22 does not exist in the line 1 and the display element 22 does not exist in the row 1, it is desirable to display the display data of these columns and rows by some method in order to improve the display quality. .

FIG. 16 shows the display element 2 as shown in FIG.
Description of the display control method according to the fourth embodiment of the present invention in which display data of columns and rows in which the display element 22 does not exist is displayed on the adjacent display elements 22 on the upper, lower, left, and right sides when the display elements 22 are arranged. It is a figure.

In this example, the 1V display period is divided into five periods to control the lighting of the display element 22. The driving method A displays the display data that should be originally displayed on the display element 22 in the first ⅕ period of the 1 V display period, and displays the display data in the vertical direction of each display element 22 in the second ⅕ period. Of 1
Display the display data of the position on the dot. Third 1 /
In the period of 5, the display data of the position of one dot left in the horizontal direction of each display element 22 is displayed, and in the fourth 1/5 period, the display data of the position of one dot below the vertical direction of each display element 22 is displayed. indicate. Finally in the fifth 1/5 period,
The display data at the position one dot to the right of the horizontal direction of each display element 22 is displayed.

That is, four dots of display data that are adjacent in the counterclockwise direction are sequentially displayed, starting from the position one dot above the display element 22 in the vertical direction. Next, the driving method B is similarly performed in the display element 2 during the first ⅕ period of the 1V display period.
Display the display data that should be displayed in 2 and display the second 1 /
In the period of 5, the display data of the position on the vertical one dot of each display element 22 is displayed. In the third 1/5 period, the display data at the position of 1 dot in the horizontal direction of each display element 22 is displayed, and in the next 1/5 period, 1 dot in the vertical direction of each display element 22. Display the display data at the lower position. Further, the display data at the position one dot left in the horizontal direction of each display element 22 is displayed in the fifth 1/5 display period.

That is, the display data of four adjacent positions are sequentially displayed in the clockwise direction, starting from the position on the display element 22 one dot in the vertical direction. The driving method C displays the display data to be displayed on the display element 22 in the first ⅕ period of the 1V display period, and the vertical direction 1 of the display element 22 in the second ⅕ period. Display the display data of the position on the dot. During the third 1/5 period, the display data at the position one dot below in the vertical direction of the display element 22 is displayed, and the fourth 1
During the period of / 5, the display data at the position one dot left of the display element 22 in the horizontal direction is displayed. Finally, during the fifth ⅕ period, the display data at the position one dot to the right in the horizontal direction of each display element 22 is displayed.

That is, in the driving method C, the display element 22
The display data of four adjacent positions are displayed in the order of top, bottom, left, and right. Next, FIG. 17 is an explanatory diagram of a display control method according to the fifth embodiment of the present invention. In this embodiment, when the display elements 22 are arranged as shown in FIG. 15, each display element 22 displays the display data at the adjacent diagonal position.

The position indicated by a black circle in FIG. 17 indicates the position where the LED display element 22 exists, the Δ mark indicates the position of the display data to be displayed on the display element 22, and the blank portion ignores the display data at that position. It is shown that.

During the first ⅕ period of the 1 V display period, the display data at the position originally supposed to be displayed is displayed on the central display element 22a in the enlarged view at the lower right of the figure (display element 22a in FIG. 17). Position), and a position diagonally to the right of the display element 22a (display element 22 of FIG. 17) during the second ⅕ period.
The display data of the position shown in a) is displayed on the display element 22a. Similarly, during the third ⅕ period, the display element 2
The display data at the position diagonally above and to the left of 2a (the position indicated by the display element 22a in FIG. 17) is displayed, and in the fourth 1/5 period, the position diagonally below and to the left of the display element (display element in FIG. 17) is displayed. Two
The display data of the position indicated by 2a) is displayed. Finally, in the fifth ⅕ period, the position diagonally lower right (see FIG. 17).
The display data of the position indicated by the display element 22a) is displayed on the display element 22a.

In this case, the five display elements 22a to 22e, which are arranged adjacent to each other on the diagonal line, respectively display the display data at the left and right diagonal up and down directions, so that the display element 22 does not exist. Display data of 1
Although it is displayed twice by another display element 22 in the display period of V, since the display timing is deviated in time, it is possible that the brightness of that part becomes imbalanced with other parts. Absent.

FIG. 18 is a diagram showing an example of an advertisement on the display board 39. By recording a character for advertisement or a picture of an advertisement character on the portion of the display panel 39 where the display element 22 does not exist by painting or the like, it can be used as an advertising device even when the display panel 39 is not turned on. .

The LED display element 22 has bright surroundings such as during the daytime.
Even when it is not possible to clearly display an image or the like even when is turned on, the advertising effect can be improved by the pictures and characters recorded on the display panel 39 such as painting. As a result, it is possible to provide an advertising medium having the advantages of both a billboard advertisement by painting or the like and arbitrary characters and a still image, a moving image, and a fluid display by the LED display element 22.

In the above-described embodiment, the case where the display elements 22 are arranged in a zigzag pattern has been described as an example, but the arrangement method of the display elements 22 is not limited to this, and the required display quality can be realized. The number of display elements and the arrangement thereof may be arbitrary as long as they are provided. Further, how many times the display period of one cycle is divided may be appropriately determined according to the required display quality. The present invention can also be applied to the case where one screen is composed of a plurality of frames. In that case, the display data of a plurality of frames may be divided and displayed in a plurality of periods, or may be divided into a plurality of periods as a whole.

The present invention is not limited to the display device using the LED display element 22, and may include a lamp, a discharge tube, an LCD, and an EL.
It can be applied to a device using any display element. Further, it may be a device in which the display control unit and the display panel are separately configured.

[0106]

According to the present invention, it is possible to reduce the number of display elements while maintaining the display quality and realize a display device at a lower cost. Further, by temporally shifting the period in which the display elements in the odd rows or columns are turned on from the period in which the display elements in the even rows or columns are turned on, it is possible to improve the display quality in the fluidized display or the like.

[Brief description of drawings]

FIG. 1 is a diagram showing an arrangement of display elements according to a first embodiment.

FIG. 2 is a block diagram of a display circuit.

FIG. 3 is a block diagram of a memory control unit.

FIG. 4 is a diagram showing a correspondence relationship between an address of a display element and an address of a memory.

FIG. 5 is an explanatory diagram of a memory writing and reading period.

FIG. 6 is an explanatory diagram of a display period according to the first embodiment.

FIG. 7 is a diagram showing a display state when the display period of one cycle is divided into two.

FIG. 8 is a diagram showing a display state when the display period of one cycle is divided into three.

FIG. 9 is a diagram showing a composite image when the display period of one cycle is divided into three.

FIG. 10 is an explanatory diagram of flow display.

FIG. 11 is an explanatory diagram of a flow display according to the third embodiment.

FIG. 12 is a diagram (1) showing a correspondence relationship between an address of a display element and an address of display data.

FIG. 13 is a diagram (part 2) showing a correspondence relationship between an address of a display element and an address of display data.

FIG. 14 is a diagram showing a display example of the third embodiment.

FIG. 15 is a diagram showing an arrangement of display elements according to a fourth embodiment.

FIG. 16 is an explanatory diagram of a display control method according to the fourth embodiment.

FIG. 17 is an explanatory diagram of a display control method according to the fifth embodiment.

FIG. 18 is a diagram showing an example of an advertisement on a display board.

FIG. 19 is a diagram showing an arrangement of display elements of a conventional display device.

[Explanation of symbols]

21 Display 22 Display element 31 Display circuit 32 switching circuit 33 Control unit 35 decoder 36 Timing signal generator 38 unit control 37 memory controller 40, 41 memory 39 display board

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Claims (3)

(57) [Claims] 1. A first and sequences that Do a plurality of display elements is less than the display element number required to display the image of the resolution determined by the display data of at least the first sequence
Display in the horizontal, vertical or diagonal direction of the position where no display element exists.
Display elements of the second array in which the display elements are arrayed and the same display data of the entire screen are displayed for a predetermined display period.
In the case of
The display data of the position where the display element is present among the display data of 1 is displayed on the corresponding display element of the first and second arrays, and the same display is performed during the remaining display period of the display period.
In the display data, the display data at the position where the display element does not exist is displayed at the position next to the position in the horizontal, vertical or diagonal direction .
And a display control means for displaying on the display elements of the second array . 2. The display control means, when displaying an image in a fluidized manner, displays one of an even numbered column and an odd numbered column of the same column or row within a display period in which the same display data is displayed.
Of the same display data in the first quarter of
In the display data of position that does not exist in the current column or row of the display device, to display to the previous adjacent display elements of the position of the column or row, in the second quarter period, the same
Display data of the position where the display element of the current column or row in the display data of is displayed on the corresponding display element,
During the third ¼ period, the display data at the position where the display element of the current column or row exists in the same display data is displayed on the corresponding display element. / 4 period, the same display data as in the first period
In the display data of the position where the display element of the current column or row does not exist, is displayed on the adjacent display element of the position of the immediately preceding column or row, and the other display of the even or odd rows is displayed. wherein the first quarter of the period in the display period to display the display data of the position at which the current column or row of the display elements in the same display data on the display device applicable, the During the second quarter, the same
Display data position there is no current column or row of the display elements in the display data, is displayed on the adjacent display elements of the position of the previous row or column, the third quarter
During the period, the display data of the position where the display element of the current column or row does not exist is displayed on the adjacent display element of the position of the previous column or row, as in the second period.
The display device according to claim 1, wherein during the fourth quarter period, display data at a position where the display element of the current column or row exists is displayed on the corresponding display element as in the first period. 3. The same display data for one entire screen is displayed on the display device.
A display control method for displaying data for a predetermined display period, the display control method comprising a plurality of display elements less than the number of display elements required to display an image having a resolution determined by display data .
Array and the presence of at least the display element of the first array
Do not arrange display elements horizontally, vertically or diagonally
The second display elements of the array are arranged on the display device, said display period displaying the same display data of one entire screen was
In some cases, the display period may be part of the same display period.
Display data at the position where the display element exists in the display data
Are displayed on the corresponding display elements of the first and second arrays.
The same display during the remaining display period of the display period.
Display data of the position where the display element does not exist in the data
The first and second positions adjacent to each other in the horizontal, vertical or diagonal direction of the position.
And a display control method for displaying on the display element of the second array .