JPS6113238B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display method using a display element such as a discharge panel, and particularly to a bar graph display method for numerical information defined by binary or decimal numbers.

2. Description of the Related Art Conventionally, methods for displaying information such as letters, numbers, symbols, and graphs using plasma display elements are known. For example, when displaying numerical information in a bar graph using a discharge panel in which selected intersections of both row and column electrodes arranged opposite to each other emit light, each of the column electrodes of the discharge panel is sequentially scanned in a time-division manner. By selectively controlling the row electrodes according to data defined in binary or decimal numbers in correspondence with the scanning of the electrodes, a bar graph corresponding to the data can be displayed.

However, the above method has the drawback that each selected intersection of both matrix and matrix electrodes emits light only during the time when the corresponding column electrode is being scanned, so that the brightness decreases in proportion to the number of column electrodes.

In order to improve this drawback, the present invention sets the number of scans of column electrodes to 2 per row electrode regardless of the number of column electrodes,
Therefore, it is an object of the present invention to provide a bar graph display method in which the ratio of the light emission time of each selected light spot on both row and column electrodes is halved per row electrode.

The details of the present invention will be described below with reference to the drawings regarding an embodiment in which the input information is a binary value.

FIG. 1 is a block diagram showing an embodiment of the present invention. The discharge panel 1 is well-known, and has a plurality of row electrodes 2 parallel to each other and a plurality of column electrodes 3 parallel to each other arranged in a matrix shape, and a discharge material is sandwiched between the two electrodes. The structure is such that the intersection of the two electrodes discharges and emits light.

Now, for ease of explanation in Figure 1,
Input 4 is assumed to consist of a 4-bit binary number.
The input 4 is distributed to a first divided input 5 consisting of the upper two bits and a second divided input 6 consisting of the lower two bits. The first divided input 5 is counted down or counted up by 1 in the up-down counter 7 according to the state of the logical value of the control panel 22, and then sent to the first decoder 8. The second divided input 6 is directly input to the second decoder 9. and decoded into decimal numbers to obtain a first decoded output 10 and a second decoded output 11, respectively. The first decode output 10 is provided at the first gate 12 and the second decode output 11 is provided at the second gate 13 with the control pulse 2.
2, the selection state is controlled by 2, and mixed with the discharge AC pulse 23 to output the first gate output 14.
and a second gate output 15 is obtained. The first gate output 14 is input to the driver 16, and the second gate output 15 is input to the second driver 17 to obtain a first drive output 18 and a second drive output 19, respectively. 1st
Each output of the drive output 18 is output from the matrix section 2
0, the first drive output 18 selected from each matrix intersection 21 and the selected second drive output are bridged in a matrix through diodes in the forward direction with each output of the second drive output 19, respectively. Only the matrix intersection point 21 of the output 19 is in the selected state.

Each matrix intersection point 21 is connected to each electrode of the column electrodes 3 of the plasma display panel 1 in a corresponding manner,
The column electrode 3 corresponding to the selected matrix intersection point 21 becomes selected. On the other hand, the row electrode to be displayed among the row electrodes 2 is selected in advance by the row electrode selection switch 24.
If selected by , the intersection of the selected row electrode 2 and the selected row electrode 3 can be displayed by emitting light.

As will be described later, in the present invention, in the method of displaying the input 4 as a bar graph on the discharge panel 1, the display is divided into two complementary displays,
A portion of the bar graph corresponding to input 4 is displayed in the first period τ ₁ , and the remaining portion is displayed in the second period τ ₂ . Now _, if the binary input 4 is numerical information k when converted into a decimal number, the column electrodes 3 ₁ , _{3 2 .} Column electrodes 3 _i+1 , 3 _i+2 during period ₂
...3k is selected. If the switching speeds of τ ₁ and τ ₂ are selected to a degree that causes no flickering, it is possible to substantially continuously display the information of k as a bar graph.

FIG. 2 is a diagram showing in detail the structure of each block in FIG. 1. In the figure, control pulse 2
2 is a display switching pulse for displaying input 4 in a temporally divided manner as described above, and its polarity is τ ₁
It is set to be negative (logic 0) during the period τ and positive (logic 1) during the period τ ₂ .

First, the display state during the period τ ₁ in which the control pulse 22 becomes logic 0 will be described. To make the explanation easier to understand, input 4 is a binary number.
Assume that it is 1010, that is, the numerical information of 10 in decimal number. As mentioned above, the first divided input 5 of the inputs 4 is counted down by 1 in the up-down counter 7 by the control pulse 22 which becomes logic 0, becomes 01, is input to the first decoder 8, and becomes the first decode output _101. Generates a signal (logic 0). On the other hand, the second divided input 6 is directly connected to the second decoder 9.
and produces a signal at the second decode output ₁₁₂ . At τ ₁ , the control pulse 22 is logic 0
In this case, only ₁₀₁ of the first decoded outputs 10 are logic 0s. Therefore, the first gate 1
Outputs of G ₄ and G ₃ of 2 are logic 1, but G ₂
The output of G5 becomes logic 0, and since the output of _G5 becomes logic 0, the output of _G1 also becomes logic 0. Therefore, the discharge AC pulse 23 is output to the outputs of G ₈ and G ₉ , and the output of G ₁₀ and G ₁₁ is the logic 1.
becomes. In the end, a signal containing the discharge AC pulse 23 is generated only in the outputs of G ₈ and G ₉ .

On the other hand, G ₂₁ , G ₂₂ , G ₂₃ ,
The output of G ₂₄ becomes logic 0, so G ₂₅ ,
Pulse 23 is output to the outputs of G ₂₆ , G ₂₇ , G ₂₈ and second gate outputs 15 ₀ , 15 ₁ , 15 ₂ , 15 ₃
A signal including the discharge AC pulse 23 is generated in all of the above.

The first gate output 14 and the second gate output 15 are input to the first driver 16 and the second driver 17,
Drive signals are generated at first drive outputs 18 ₀ , 18 ₁ and second drive outputs 19 ₀ , 19 ₁ , 19 ₂ , 19 ₃ . As mentioned above, the first drive output 18 and the second drive output 19 are connected to the matrix section 20.
A first diode 25 and a second diode 26 which are bridged in a matrix and are in the forward direction, respectively.
A matrix intersection point 21 is formed through
Matrix intersection point 21 of both selected drive outputs
_{0 , 21 1 , 21 2 .}
The intersection with the row electrode 2 selected by is displayed by lighting.

Next, the display state during period τ ₂ , that is, the period in which the control pulse becomes logic 1, will be described. The first divided input 5 is the control pulse 22 which becomes the logic 1.
As a result, the up-down counter 7 counts up by 1 and becomes 10, and the first decode output is 1.
₀₂ produces a signal (logic 0). The second split input provides a signal to the second decode ₁₁₂ as in the case of τ ₁ .

Since the control pulse 22 is logic 1, G ₅ ,
The outputs of G ₆ and G ₇ become logic 1, and the outputs of G ₁ , G ₂ , G ₄
The output of G ₈ , G ₉ , G ₁₁ becomes logic 1, the output of G ₃ becomes logic 0, and the output of G ₁₀ becomes logic 1, that is, the first decode 14 ₂
generates a signal. On the other hand, the second decode output 11 ₂
Since the outputs of G ₂₁ , G ₂₂ , and G ₂₃ become logic 0, signals are generated at the outputs of G ₂₅ , G ₂₆ , and G ₂₇ , that is, the second decode outputs 15 ₀ , 15 ₁ , and 15 ₂ . Also, at this time, the output of _G24 becomes logic 1, so no signal is generated at the output ₁₅₃ of _G25 . In this way, the lowest output 18 ₂ of the first drive output lines not selected during the period τ ₁
Chisel and 2nd drive output 19 ₀ , 19 ₁ , 19 ₂
A drive signal is generated at the matrix intersection point 21.
₈ , 21 ₉ , and 21 ₁₀ are brought into a selected state, the corresponding column electrodes 3 ₈ , 3 ₉ , and 3 ₁₀ are selectively driven, and the intersections with the selected row electrodes 2 are illuminated and displayed.

Further, by selecting another row electrode 2 using the row electrode selection switch 24 and repeating the operations in each period τ ₁ and τ ₂ , a plurality of inputs can be displayed substantially simultaneously.

This concludes the explanation of the embodiment. In the above embodiment, the case where the input is binary numeric information is explained, but when the input is decimal numeric information, the decimal numeric information is By converting into a binary number by analog-to-digital conversion and distributing this to the first divided input 5 and the second divided input 6, the input becomes similar to the case where the input is binary numerical information.

In the above embodiment, a discharge display board is used as the display element, but light emitting diodes, EL,
It goes without saying that similar effects can be obtained by using other display elements such as liquid crystal.

As described above, according to the display method of the present invention, since the input information is divided into two and displayed as a bar graph, it is possible to obtain a brighter display method than other multi-divided display methods such as the scanning method. The structural drive method has an excellent feature of being able to significantly reduce the number of drive elements.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing the structure of each block in FIG. 1 in detail. In the figure, 1 is a discharge panel, 2 is a row electrode, 3 is a column electrode, 4 is an input, 5 is a first divided input,
6 is the second division input, 7 is the up/down counter,
8 is a first decoder, 9 is a second decoder, 10 is a first decode output, 11 is a second decode output, 12
is the first gate, 13 is the second gate, 14 is the first gate output, 15 is the second gate output, 16 is the first driver, 17 is the second driver, 18 is the first drive output, 19 is the second drive output , 20 is a matrix section, 21 is a matrix intersection, 22 is a control pulse, 23 is an AC pulse for discharge, 24 is an electrode selection switch, 25 is a first diode, and 26 is a second diode.

Claims (1)

[Claims] 1 A plurality of column electrodes parallel to each other and at least one row electrode parallel to each other are arranged oppositely in a matrix, and a matrix intersection of a selected column electrode and a selected row electrode among the electrodes is displayed. In a bar graph display method that displays a quantity according to input information as a bar graph, the first driver output line group and the second driver output line group
A matrix circuit configured to supply a driver signal from a matrix intersection with a group of driver output lines to the column electrodes, and an input binary number determining the number of selected column electrodes in upper and lower digits. means for dividing to obtain a first divided input and a second divided input;
means for obtaining a first driver signal from the intersections of the first driver output line selected based on the information of the first divided input and all the second driver output lines during a first period; Only the lowest first driver output line of the second driver output line selected based on the information of the second divided input and the first driver output line not selected by the first divided input during the period. means for obtaining a second driver signal from an intersection with the input information; and a means for obtaining a second driver signal from the intersection of the first and second driver signals, and a means for alternately switching the first period and the second period to apply the first driver signal to a number of column electrodes corresponding to the input information. A bar graph display method characterized in that the bar graph display is performed by dividing and supplying the second driver signal in a complementary manner.