JPS59219790A - Display system of discharge display panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a driving method for an external electrode type discharge display panel, so-called a plasma display panel.

This type of plasma display panel (FDP)
It is abbreviated as ) are arranged in a matrix on a plurality of generally transparent column electrode groups parallel to each other and a plurality of generally opaque row electrode groups parallel to each other, with an ionizable gas interposed between the two electrode groups, and selected. A method is generally known in which the intersection of a selected row electrode and a selected column electrode is displayed by discharging and emitting light.

In the above FDP, by controlling the row electrode group and the column electrode group 1 and 7 in response to the large power signal by controlling the selection of the electrodes in accordance with the human power 1J, it is possible to fully display the original image of 7 in response to the large power signal.

For example, 'HL' of either the row electrode group or the column electrode group?
Each electrode in group 1, for example, a row electrode group, is sequentially and time-divisionally selectively scanned, and the other electrode group 5, for example, in a column 1 electrode group, is selectively scanned. By controlling the selection using the power signal while maintaining synchronization with the scanning, it is possible to display images corresponding to the power signal on the FDP surface.

In an external electrode type FDP, it is necessary to drive with a current voltage, and a high frequency pulse called a toggle pulse is included in the drive signal applied to the row electrode group and column electrode group.

FIG. 1 is a complete diagram of a conventional embodiment. The signal generated by the 4MIIz crystal oscillator (0, S, C) 7 is counted down by the readout color/reference signal (几, C) 6 and output to the 8-bit readout address signal a and the character generator (C, G). )9 addresses are generated, and data and clock signals for PDP row electrode scanning C(
i7 is generated and input to the shift register (S, 1-L) 4. Shift register (S, also ■) 4 is 8 lines x 8 lines = 64
All the parallel No. 1 blade terminals of the book are connected one by one to 64 row electrode drivers (几, D) 2, and the blades are connected to the row electrodes of PDPI.

Therefore, the signal input to the shift register (8, R) 4 is converted into a voltage sufficient to drive the row electrode driver (L, D) 2, and is input to the PDP1 for 8 rows of 64 lines of LpI)pl. The rows and poles are sequentially scanned in a time-division manner at a period of approximately 200 μB. Therefore, one screen is approximately 12.5 m5 (8
011z). Also, this PI)P
The data α consisting of 7 pits displaying the original image corresponding to the above-mentioned scanning passes through the control circuit 11' and is sent to the RA.
Written to MIO.

The write address of RAMI Q is designated by a cursor counter (C, C) 14 that designates the cursor position and an 8-bit address e. The data written in AMIO is read out by the read address number a, and converted into a character signal by the character generator (C, G) 9.

Shift register % (8, 1 (,) Input to 5. Shift register (S, R) 5U 32 digits x 5 - 160 parallel signal blade terminals?Have these to column electrode driver <C, D) 3 The cutting edge is connected to the PDPIQ column electrode. Therefore, the shift register (8, 1(
) 5 is the column electrode driver (C, D).
3, it is converted into a voltage sufficient to drive PI) P l' and inputted to PDP1, and 160 lines of data for 32 digits are applied at the timing of scanning each row electrode. On the other hand, 3
In the display unit of this PDPfi display device consisting of 8 lines of 2 digits, the underline cursor that indicates the position where all data will be written next is a comparator (which is generated when the logic of address signal a for reading and address signal e for writing matches). C) 120 output - 4'tt - Lights up by inputting it to the cursor display control circuit 8.

Therefore, the under-twin cursor is displayed at a cycle of approximately 8011z on the screen in the same way as other character displays, and no flicker is felt when viewed with the human eye.

However, in such a PDP & display device, a part of the display capacity of 32 digits and 8 lines, for example [all 32 digits on the 8th line are used for manual operation, and 32 digits from 1st to 7th lines are used for computer voice, etc. When used to display data from a machine, the underline cursor lights up only for the 32 digits of the 8-line date for key manual input. Therefore, if an address is specified to any digit on the 8th line and the cursor is lit, if there is data from the machine, the under twin cursor will be turned off once, and any digit on the machine data display section 1 to 7 will be turned off. After specifying an address to a digit, writing data, and displaying a character, it was necessary to specify the address again to the original 8th line position and turn on the entire underline cursor.

Therefore, in that case, the frequency of the underline cursor lit on one screen was reduced to less than 80Hz, and when it became about 50Hz or less, the underline cursor flickered completely, which was a major drawback.

The present invention eliminates these drawbacks and has a counter for specifying the display position of characters such as numbers, letters, and symbols and the cursor, and has the feature that the cursor can be displayed even during the period when the character display position iur is specified. Let go! This provides a display method for a display board.

FIG. 2 is a block diagram showing an embodiment of the PDP driving method according to the present invention. This is a PDPlk drive having a display of 32 digits and 8 lines as in FIG. It is a display device. PDPl
The row electrode group is a 4MIIz crystal oscillator (0
,S,C)7. Read counter (IIL, C)6.
Shift register (S, R)4. The circuit composed of the row electrode driver (D) 2 has approximately 2
Scanning is performed sequentially and time-divisionally at a period of 00 μs.

In addition, data for displaying the original image in response to the above scanning is also provided by a control circuit (C) 11, a random access memory (AM), a 10° character generator <co> 9. Read counter (R, C) 6
．． Write counter (W, C) 15° corresponding to the cursor counter in Figure il1 Address switching circuit (A, 5) 13 for switching between full address signal writing and reading
．． Shift register (s, 1t)5. and digit electrode driver (C0D) 3, and the PDP
160 data codes for 32 digits are applied at the timing of scanning each row electrode of 1.

On the other hand, the underline cursor is created by adding a 5-bit address signal i that specifies the 1st to 32nd digits of the 8-bit addon bond e to the cursor counter (C0C) 14 that counts all notes on the 8th line, and The cursor counter is activated only when the 8th line is specified by the 3-bit address 100 which specifies lines 1 to 8 of the 8-bit address 1g and e and the signal g obtained by ANDing the load signal f. (c, c) Load i4t. The 5-bit address signal i loaded in this way is compared with 5 bits a of the 608-bit read address signal of the read counter (R, e) by the comparator (C) 12, and the 3-bit address The signal of the same logic as the and of No. 1g, which was completely defeated, is connected to Concha L/-ta (C
) 12 and when they match, the entire cursor display control circuit 8 is manually powered.

Therefore, according to the PDP display device of this embodiment, a part of the display answer amount of 8 lines of 32 digits, that is, all 32 digits of the 8th line are used for all keys manually, and all 32 digits from 1st to 7th lines are used for computer etc. When using data from the machine for red water, the underline cursor for key manual power can be controlled to light up automatically, and even if there is data manual power from the machine, the underline cursor will enter key human power No. 16 next. Fixed the light in its original position until it is displayed. That is, since the frequency of the underline cursor lit on one screen is the same as the display frequency of characters such as numbers, letters, symbols, etc., a PDPi display device with good display quality without flickering of the underline cursor can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the configuration of a conventional embodiment, and FIG. 2 is a block diagram of the configuration of an embodiment of the present invention. l...PDP, 2...row electrode driver, 3...digit electrode driver, 4,5...
Shift register, 6... Readout counter, 7... Crystal oscillator, 8... Cursor display control circuit, 9... Character generator, 10... ...Random access memory, 11
・・・・・・Control circuit L12・・・Comparator, 13・・・Address switching circuit, 14...
...Cursor counter, 15...Writing counter. Kaya 1@

Claims (1)

[Claims] A group of column electrodes and a group of row electrodes are provided so as to face each other at a right angle with a predetermined distance therebetween, and one of the group of column electrodes and the group of column electrodes of the display panel is provided, and the space is filled with an ionizable gas. The electrode groups of the other electrode group are sequentially scanned in a time-division manner, and the other electrode group is selectively controlled by a large-power signal in response to the scanning, and a character and a display position designation cursor 'ff1N are displayed at an arbitrary position on the discharge display board. A display method for a discharge display board, characterized in that the display method includes a counter for specifying all the display positions of the character and the cursor, and the cursor can be displayed even during a period when the display position sound of the character is specified.