JPS6350716B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display system using a display element such as a discharge display board, and particularly relates to a position display system for numerical information.

In a display panel such as a discharge display board, a plurality of segment electrode groups parallel to each other and a digital electrode group opposing thereto are arranged for analog display, and an ionizable gas is interposed between these electrode groups, A method is generally known in which a selected intersection of both electrodes is displayed by discharge light emission. On the display panel, each electrode of the digital electrode group is selected and scanned sequentially in a time-division manner, and each electrode of the segment electrode group is selectively controlled by input data while maintaining synchronization with the scanning. Analog quantities corresponding to input data can be displayed on the display panel surface. However, this method has a problem in that as the number of digital electrodes increases, the number of scans increases, resulting in a decrease in brightness.

SUMMARY OF THE INVENTION An object of the present invention is to provide a display method that inputs the above-mentioned numerical information and displays positions corresponding to the input information in a columnar manner on a display element such as a discharge display board using a simple method.

According to the present invention, a plurality of digital electrodes arranged in the longitudinal direction and a plurality of bar-shaped segment electrodes that are parallel to each other and opposite to each of the digital electrodes face in the same direction as the arrangement direction of the digital electrodes. The segment electrodes arranged at corresponding positions on each digital electrode among the segment electrodes are commonly connected, and the opposing space between the digital electrode and the segment electrode is filled with a discharge substance, and the selected digital In a discharge display panel driving method in which a selected segment electrode portion on an electrode discharges and emits light, and a position corresponding to input data is displayed on a discharge display panel, upper data indicating numerical information of upper digits of input data. to the selection control of the digital electrode, and the lower data indicating the numerical information of the lower digit to the selection control of the bar segment electrode. First, each bar segment electrode corresponding to a value larger than the lower data and a value smaller than the upper data The intersection determined by each corresponding digit electrode is selectively emitted and the bar segment electrode corresponding to the lower data and each bar segment electrode corresponding to a value smaller than the lower data and the digit electrode corresponding to the upper data and the value smaller than the upper data are emitted. There is obtained a driving method for the discharge display panel characterized in that input data is displayed in a columnar manner on the display panel by selectively emitting light at each intersection with each digital electrode corresponding to a value.

The details of the present invention will be explained below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

A plurality of digital electrodes 2 are arranged in the longitudinal direction of the discharge panel 1, and on each digital electrode 2, a plurality of bar-shaped segment electrodes 3 are arranged facing each other in the same direction as the arrangement direction of the digital electrodes 2. The space is filled with discharge material. Corresponding electrodes of the bar segment electrodes 3 ₀ , 3 ₁ , 3 _{2 .} It has a structure that looks like it lights up in a shape.

Input data 4 is numerical information consisting of lower data 5 indicating lower digits in a decimal number and upper data 6 indicating upper digits. The lower order data 5 is input to the first decoder 10 and decoded into a corresponding decimal value to obtain a decoded output _D1 .

The selection state of the decoded output _D1 is controlled by the control signal C in the first gate circuit 11 to obtain the gate output _G1 . The gate output _G1 is input to the bar segment driver 12, where it is mixed with the discharge pulse and stepped up to the drive voltage of the discharge pulse 1, thereby selectively driving the corresponding bar segment electrode 3. Further, the upper data 6 in the input data 4 is input to the subtracter 13, where it is subtracted by the control signal C output from the controller 14 to obtain the subtraction output S. The subtraction output S is input to the second decoder 7 and decoded into a corresponding decimal value to obtain the gecode output _D2 . The gate output D ₂ is input to the second gate circuit 8 to obtain the gate output G ₂ . The gate output _G2 is input to the digital driver 9, where it is mixed with a discharge pulse and stepped up to the drive voltage of the discharge panel 1 to selectively drive the corresponding digital electrode 2.

Next, the operating principle of the present invention will be explained. Second
The figure is a partial detailed view for explaining the operation of the present invention. Now, 10 digital electrodes 2 are arranged on the discharge panel 1, and 10 digital electrodes are arranged on each digital electrode 2.
It is assumed that bar segment electrodes 3 are arranged and the numerical information of the input data 4 is 67. At this time, the upper data 6 is a binary bit 0110 indicating a numerical value 6, and the lower data 5 is a binary bit 0111 indicating a numerical value 7.

The control signal C output from the controller 14 is a signal for selectively scanning the display panel in two parts. First, the display state during the period in which the above-mentioned control signal C is positive (logic 1) will be described. The lower order data 5 is input to the first decoder 10, producing a selection signal at the gecoder output _D17 . The decoder output D ₁ is input to a first gate circuit 11 consisting of an AND gate 11 ₀ and an exclusive OR gate 11 ₂ . Now decoder output
Since _D17 is a logic 0, the output of the AND gate ₁₁₁₇ is a logic 0. Since the output of AND gate _11-17 is connected to the input of AND gate _11-16 , the output of AND gate _11-16 also becomes logic 0. Similarly, each output of AND gates ₁₁₁₅ to ₁₁₁₀ becomes logic 0. Therefore, the outputs of AND gates 11 ₁₈ and 11 ₁₉ are logic 1s, while the outputs of AND gates 11 ₁₇ to 11 ₁₀ are logic 0s. When the control signal C is input to the exclusive OR gate 11 ₂ of the first gate circuit 11 ₁ , the AND gate 11 ₁
In the exclusive OR gate 11 ₂ to which the output of AND gate 11 2 is input, the exclusive OR gate output G ₁ inverts the output of the AND gate 11 ₁ . That is, Exclusive or Gate 11 ₂₈ ,
The output of 11 ₂₉ becomes logic 0, and the output of 11 ₂₇ becomes 1.
The output of ₁₂₀ becomes logic 1. Therefore, each exclusive-OR gate output G ₁₈ , G ₁₉ becomes logic 0, so that it is in a selected state and only the bar segment drive signals S ₈ and S ₉ output from the bar segment driver 12 are drive signals containing discharge pulses. 3 ₈ and 3 ₉ of the bar segment electrodes 3 are selected.

On the other hand, the control signal C and higher-order data 6 output from the controller 14 are input to the subtracter 13. Subtractor 1
3, the control signal C is transmitted from the upper data 6 mentioned above.
is subtracted, and the result is input to the second decoder 7. Now control signal C is logic 1, upper data 6
is the numerical value 6, so the second decoder 7 has the numerical value 5.
The binary bit 0101 indicating the
A selection signal is produced at the decoder output D ₂₅ . When the second decoder output _D25 is input to the second gate circuit 8, the output of the second gate ₈₅ becomes logic 0. Second
Since the output _G25 of the gate ₈₅ is connected to the input of the second gate ₈₄ , the output _G24 of the second gate ₈₄ also becomes logic 0. Similarly, each output from the second gate ₈₅ to the second gate ₈₀ becomes logic 0. This second gate circuit 8 allows digital drive signals I ₀ ,
A drive signal including a discharge pulse is generated only in I ₁ ... I ₅ ,
Of the digital electrodes 2, 2 ₀ , 2 ₁ . . . 2 ₅ are in the selected state. That is, during the period when the control signal C is logic 1, the segment electrodes 3 ₈ and 3 ₉ of the digital electrodes 2 ₀ , 2 ₁ , . . . 2 ₅ are lit.

Furthermore, the display state during the period in which the above-mentioned control signal C becomes logic 0 will be described. When the control signal C is input to the exclusive OR gate 11 ₂ of the first gate circuit 11 _{, the exclusive OR gate output G 1 becomes an AND gate in the exclusive OR gate 11 2 to} which the output of the AND gate 11 ₁ is input. 11 The output is the same as ₁ ,
Obtain an exclusive-or-gate output that is the inverse of the above. In other words, the exclusive OR gate outputs G ₁₀ , G ₁₁ ...G ₁₇ become logic 0,
Bar segment drive signals S ₁₀ , S ₁₁ . . . are output from the bar segment driver 12 in the selected state.
Only _S17 generates a drive signal including a discharge pulse signal to select the bar segment electrodes ₃₀ , ₃₁ ... ₃₇ .

On the other hand, in the subtracter 13, since the control signal C is logic 0, the second decoder 7 does not perform subtraction.
The higher-order data 6 is inputted as is to the 2nd decoder, and only the second decoder output _D26 is logic 0. Therefore, the outputs of the second gates 8 ₇ , 8 ₈ , and 8 ₉ are logic 1, but the output of 8 ₆ is logic 0, and 8 ₆
Since the output of 8 ₅ is input to 8 5 , the output of 8 ₅ becomes logic 0, and similarly, each output from 8 ₄ to 8 ₀ becomes logic 0. This second gate _circuit 8 generates a drive signal including a discharge pulse only in the digital drive signals I ₀ , I _{1 , .}
...2 ₆ becomes selected. That is, during the period when the control signal C is logic 0, 2 ₀ , 2 of the digital electrodes 2
The bar segment electrodes 3 ₀ , 3 ₁ ... 3 ₇ of 2 _{1 ,} . . . 2 6 are turned on.

As shown above, during the period when the control signal C is logic 1, the bar segment electrodes 3 ₈ and 3 ₉ of the digital electrodes 2 ₀ to 2 ₅ are lit, and during the period when the control signal C is logic 0, the digital Electrode 2 ₀ ~
₂₆ segment electrodes ₃₀ to ₃₇ are turned on.
By repeating the control signal C at a period that does not cause flickering, 67 bar-shaped segments of input data can be lit on the discharge display panel 1.

In this case, a two-division scan is performed using the control signal C regardless of the number of digital electrodes and the number of bar segment electrodes. The brightness of the display is determined by the ratio of the discharge pulse to the number of scans,
As the number of discharge pulses/scans increases, the brightness becomes brighter, so by decreasing the number of scans, the brightness becomes brighter than in the conventional method.

As described above, according to the position display method of the present invention, numerical information corresponds to the digital electrodes and bar segment electrodes, so the number of driver elements for driving the display elements can be significantly reduced. Since two-division scanning is possible regardless of the current, if the discharge pulse is kept constant, the display brightness can be made brighter than before, and if the display brightness is kept constant, the number of discharge pulses can be reduced. By reducing the number of discharge pulses, the switching loss of the driver section is reduced, and a reduction in power loss can also be expected. Although the above embodiments have been explained using a discharge panel, the present invention can also be applied to known display devices such as liquid crystal display panels and fluorescent display tubes.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention;
FIG. 2 is a block diagram showing in detail the structure of each block diagram in FIG. 1. In the figure, 1 is the discharge panel, 2 is the digital electrode, 3 is the bar segment electrode, 4 is the input information,
5 is lower data, 6 is upper data, 7 is a second decoder, 8 is a second gate circuit, 9 is a digital driver, 10 is a first decoder, 11 is a first gate circuit, 12 is a bar segment driver, 13 is a Each subtractor is shown.

Claims (1)

[Claims] 1 A plurality of digit electrodes and a plurality of bar segment electrodes facing each of the digit electrodes are arranged facing each other in the same direction as the arrangement direction of the digit electrodes, and each of the digit electrodes among the bar segment electrodes The bar segment electrodes arranged at corresponding positions on the top are commonly connected,
In a method in which a selected bar segment electrode on a selected digital electrode displays a position corresponding to input data on a light-emitting display board, upper data indicating numerical information of the upper digit of the input data is displayed on the digital electrode. In the selection control, the lower data indicating the numerical information of the lower digit is made to correspond to the selection control of the bar segment electrodes, and first, each bar segment electrode corresponding to a value larger than the lower data and each corresponding to a value smaller than the upper data are selected. The intersection points determined by the digit electrodes are selectively emitted, and then the bar segment electrodes corresponding to the lower data and the bar segment electrodes corresponding to values smaller than the lower data, the digit electrodes corresponding to the upper data, and the bar segment electrodes corresponding to the values smaller than the upper data Selectively emit light at each intersection with each digital electrode corresponding to the value,
A position display method characterized by displaying input data in columnar form on a display board.