JPS6187197A - Active matrix 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 [Technical Field] The present invention relates to active matrix panels.

[Prior art]

As shown in FIG. 1, the conventional scanning method for active matrix panels is to sequentially scan the gate lines 104 of the pixel writing transistors 108 from the top to the bottom using a vertical shift register 101. While the line is being selected, the horizontal shift register 102 sequentially scans the data line 105 from left to right, sequentially writing the video signal 106 to the pixels. This horizontal scanning is performed from left to right while one of the vertical gate lines is selected, so the operating frequency of the horizontal shift register 102 is the same as the operating frequency of the vertical shift register 101. Compared to the frequency, it becomes higher in proportion to the number of pixels in the horizontal direction. Therefore, when the number of pixels is increased to increase the resolution, the operating frequency of the shift register 102 in the horizontal direction becomes extremely high, making it difficult to manufacture the shift register. In particular, when incorporating a driver on an active matrix panel, as the operating frequency of the shift register increases, the performance of the element becomes a problem and the area occupied by the shift register increases.
Yield decreases. This decrease in yield is a big problem for printed matrix panels because the panels themselves are expensive.

Even if the driver is provided externally, if the area per pixel decreases or the number of pixels increases, it becomes extremely difficult to connect the data line or gate line to the shift register one terminal at a time. Become.

As described above, when the resolution of an active matrix panel is increased by reducing the pixel area or increasing the number of pixels to create a large screen panel, the above-mentioned major problems occur.

〔the purpose〕

The present invention is intended to solve these problems, and its purpose is to provide an active matrix panel with high resolution.

〔overview〕

In the active matrix panel of the present invention, 5 (tL=1.200.) data lines selected by one appropriate gate line are selected every other N (m=112.) as one set. , the n data lines are divided into (Ni1) groups, one of the (1i+1) data lines is scanned during the 1st gate line selection period, and the 1st gate line is scanned %(N+1) times. The present invention is characterized in that means is provided for scanning all the n data lines by selecting the following.

〔Example〕

Hereinafter, the present invention will be described in detail based on examples.

FIG. 2 shows the active matrix panel of the present invention, 207Fi, data line selection drive circuit, n(n
+1.2. ,, ) data lines 205 are m (m=1.,
．． 2) Select every other book. The selected data line is
It is sequentially scanned by pulse signals from the shift register.

An embodiment of the data line driving circuit is shown in FIGS.

In this embodiment, m=2, and the data line drive circuit selects every other data line and divides it into two sets of data lines. 801 is a shift register for scanning in the vertical direction, the timing diagram of which is shown in FIG. 4; 802 is a shift register for scanning in the horizontal direction;
A timing diagram is shown in FIG.

First, the vertical shift register 801Fi selects one gate i1804 from the top to the bottom, sends a pulse signal 402 to the gate of the transistor 308 in the pixel section, and turns on all the transistors 808 in the pixel section in one horizontal row. . When that one gate line 304 is conductive,
A horizontal shift register 802 selects every other data line through a data selection drive circuit 807, and a video signal 504 is written to every other transistor 808 in the pixel portion.

The data line selection drive circuit 807 drives the data line selection signal line 8
By adding a data line selection signal 508 to 10, every other set of data lines is selected from among the two sets.

That is, by applying a positive voltage 506 to the data line selection line 810, the N-channel full switching transistors 308 provided every other time are made conductive, the P-channel switching transistors 809 provided between them are made non-conductive, and the N-channel full switching transistors 308 provided between them are made non-conductive.
Only the data lines connected to channel switching transistor 808 are selected, and video signal 504 is written to every other data line. Conversely, if a positive voltage is not applied to the data line selection signal line 810, 507. N-channel switching transistor 808 is non-conductive, P-channel switching transistor 809 is conductive, only the data line connected to P-channel switching transistor 809 is selected, and video signal 504 is written to every data line. Therefore, by alternately selecting the N-channel and P-channel transistors of the data line selection drive circuit 807 every time the vertical gate line is scanned one circuit from top to bottom, every other data line can be scanned. You can have the righteousness to act. One screen can be constructed by scanning these two sets of data lines.

〔effect〕

As described above, according to the present invention, the data lines are divided into (N+1) sets, with each data line selected every N (N=1.206.) of the active matrix panel. , the resolution could be increased by (N+1) times. In conjunction with this, the data line selection drive circuit 207
T-Because I set it up.

The operating frequency in the horizontal direction may be the frequency that operates one of the % ("1) sets of data lines, so it is l/(N+1) times the operating frequency that sequentially scans %n data lines, and the shift register In addition, the area occupied by the shift register is reduced, and the yield can be significantly improved.

Therefore, it is easy to increase the area of the IJ Luxnel (active polymer) with high resolution.

On the other hand, especially when the driver is provided externally apart from the active matrix panel, the data line selection drive circuit 2
By placing 01 on the output matrix,
The number of connections between the external shift register and data lines is 1. /
It can be reduced by a factor of (N-1-1), making implementation easier and yield significantly improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional active matrix panel, FIG. 2 is a block diagram of an active matrix panel of the present invention, and FIG. 8 is a diagram showing an embodiment of a data line driving circuit. Further, FIG. 4 is a timing diagram for vertical scanning, and FIG. 6 is a timing diagram for horizontal scanning. 101.102,201,801,802--Shift register 108.208,804 ・・Gate line 105.20
5.805...Data line 106.206,806...Video signal line 207.80
7.Data line selection drive circuit 808..N channel switching transistor 309..P channel switching transistor 310..Data line selection signal line 401..Clock signal 402.Gate line selection pulse signal 501..Clock signal 502nd data line selection pulse signal 508...Data line selection signal 504...Video signal 505...Pixel section data retention signal and above

Claims (2)

[Claims] (1) In the active matrix panel, n (n=1, 2,...) selected by one appropriate gate line
One set consists of every N (N=1, 2,...) data lines selected from the book, and one data line is (N+1)
During the one gate line selection period, the (N+1)
Scan one set of the data lines and scan the data line (N+1) times.
An active matrix panel comprising means for scanning all of the n data lines by selecting a gate line. (2) In the active matrix panel, a data line selection drive circuit is provided for selecting one of the (N+1) sets of data lines.
Active matrix panel as described in section.