JPS60102613A - Large-sized liquid crystal full color display device - Google Patents

Abstract

PURPOSE:To make a titled device large-sized, also not to make its connecting part attract attention, and to take sufficiently a resolution, too, by joining plural units of a picture element electrode substrate, and executing an internal connection of a driving line of a TFT by vertical and horizontal lines. CONSTITUTION:As for a picture element electrode substrate 4 being a unit substrate, a picture element electrode 6, a TFT5 connected to it, a gate line 7 for driving the TFT, and a source line 8 are formed as a pattern. A large-sized active matrix substrate is formed by joining together a TFT picture element electrode substrate. A seal 16 is printed in the joint part between the substrates, so that a liquid crystal does not leak to the outside from the joint. A transparent substrate 13 is used for fixing a picture element electrode substrate 14. A driving line 15 of the TFT is connected to a driving circuit in the outside of a panel. An opposed common electrode 18 is formed on the inside surface by another transparent large-sized substrate 17, a liquid crystal 19 is oriented and sealed in between the picture element electrode and the common electrode, and sealed by a sealing part 20. On its outside, a three primary color filter film 21 of R, G and B is placed in accordance with the picture element electrode, the upper and lower parts are placed between linear polarizing films 22, and a full color display device is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a large, flat, full-color display device using liquid crystal.

[Prior art]

Conventionally, flat, full-color, large-sized display devices using liquid crystals are only π in the calculation! It is well known that a large-sized display device is constructed by arranging a crystal panel 51 externally. This well-known large display device requires a large number of external drive mechanisms, making it impossible to increase the resolution, and also requiring external wiring. i): J'l, there are drawbacks such as the seams between panels are noticeable and the image quality is not smooth.

〔the purpose〕

An object of the present invention is to improve the above-mentioned drawbacks of the prior art and provide vF1, a full-color display device that is large in size, has inconspicuous wire connections, and has sufficient resolution.

〔overview〕

In the present invention, a number of picture electrode substrates (FIG. Bent in Ha1;iL,,
One big common electric wire WI2 for that person! il: put a board on it,
A large active matrix display device is constructed by aligning and sealing liquid crystal between both l plates and sealing the entire outer periphery. In this case, each pixel electrode substrate is transported and fixed in advance onto a sufficiently flat transparent substrate in order to increase the peace K.

Further, each pixel electrode substrate is finished by polishing the end surface so that no gap is created between the substrate and the adjacent substrate. Furthermore, in order to prevent liquid crystal from leaking from the joint between the substrates, the joint is sealed by printing or the like, and then signal line connections are printed or vapor deposited on top of the seal. Of course, since the liquid crystal layer is a layer of 5 to 1 micron, it is desirable that the seal and line connection at the joint be 3 to 4 microns or less. If the lines are parallel and long <A.riti, there is a risk of wire breakage during polishing of the end face, so the drive line needs to be a single line pattern that does not run long around the outer periphery of the end face.

〔Example〕

The present invention will be described in detail below based on the V side and examples. Fig. 1 is a folded view of the conventional liquid crystal panel IfJ1 large-hari table 7 (<11 degrees) of the panel matching part. 1 is the unit panel forming the 2H, its crystal sealing part, and 3 is the connection with the driving circuit jar ↑°11'', glue-dog 1.'' child.In a well-known example, Lead breakage: Pull out the wiring on the back side in a direction perpendicular to the display surface, and line it up with the drive unit behind the display.In such a large display device, the unit panel The seam becomes quite wide, and the entire display device only has vertical and horizontal lines.This gives a very bad impression of the image fJ!i.Also, the drive IC wired on the back requires a huge amount of wiring. Processing is required, and a display device that is not only neat and easy to handle can never be obtained.

FIG. 2 shows the joints of the T 11'T active matrix ω-1 element electrode substrates forming the large liquid crystal full-color display of the present invention. Reference numeral 4 is a drawing electrode substrate which is a base for drawing, and a drawing electrode 6 and a T connected to it.
A gate line 7 and a source line 8 for Ii' T 5 and TFT t7) operation are patterned.

Gate lines and source lines between adjacent substrates are electrically conductive and connected as described later. At this time, so that both the source line and the gate line do not run the entire length of the edge of the substrate, the lines at the end are run one meter inward and two lines are run in parallel, and the TPT formation position is changed accordingly.

The edges of the substrate are polished so that the joints are smooth, and a pattern is formed so that the pitch of the pixel electrodes is constant when they are joined together. In other words, the dimensions of the image electrode where the drive line runs between the pixel electrodes are slightly reduced and the center pitch is changed. An active matrix substrate is formed.

Showing a cross-sectional view of the joint between the boards of the 3rd Guan Ruo Painting Board,
FIG. 4 is an assembled sectional view of the large display device of the present invention. show, 9
is a pixel electrode substrate and a drive line for JOI'1 TFT. A seal 11 is completely printed on the joint between the boards to prevent liquid crystal from leaking out from the joint. This seal 11 must be arranged so that it does not cover the pixel electrodes, and the width of the gap between one pixel electrode is set at most. As the sealing material, various types of organic adhesives can be used. A connection 12 between the drive lines is formed on this seal.

This connection is also formed by printing or spraying a conductive paste by baking or the like. In this way, the entire display device is assembled as shown in FIG. In the fourth part, 13 is a transparent substrate, which is used for fixing the pixel electrode substrate 4, so it must have good flatness.I/1a, for example, may be made of large glass. 1
5 is a TPT drive line, which is connected to a drive circuit outside the panel. I6 is the seal and connection part shown in Fig. 3, and 17 is another transparent large substrate with opposing common parts on the inner surface.
tK,, a pole 18 is formed, a liquid crystal 9 is oriented and sealed between the image electrode and the common electrode, and sealed with a printing part 20.

On the outside, three primary color filters Jl+5'121' (r-) of R, G, and B are placed corresponding to the pixel electrodes, and the upper and lower sides are sandwiched between linear light strips 22 to complete a full-color display device.

In this case, the liquid crystal layer is a thin 1A layer of only a few microns, and the thickness of the internal seal and wiring portion shown in FIG. 3 must also be within this range of several microns. However, as the size increases, there is a risk that the p1 connection portion, where the thickness varies and the ridges 9 are large, may come into contact with the common electrode. FIG. 5 shows an example of the pattern of the common electrode, and the problem can be solved by creating a window 24 so that the common electrode is not placed at a position corresponding to the wire connection portion. The connection area is a display invalid area, and even if there is no counter electrode, the image quality will not be affected.

6th 1 shows the entire concept of a large display device assembled according to the present invention, 25 is a unit of a pixel electrode substrate, a large display is possible by combining multiple sheets, and TP
Since the vertical and horizontal lines of the T drive lines are internally connected, they are drawn out from both ends as 26 and 27. Therefore, since there is no wiring from the joint of the combination, external wiring is very easy. By the way, when a large number of pixel electrode substrates are used together, the gradation level varies from substrate to substrate due to differences in TPT characteristics and uneven thickness of liquid crystal. A possible solution to this problem is to adjust the display signal level kH for each board.

FIG. 7 is a block diagram of an IDI N+ system in which the level of the signal applied to the TPT can be slightly varied for each unit base, and it can be set programmably. 28 is an amplifier circuit before inputting the brightness numbers of R, G, and B to all TFT drive circuits, and 29 is a level memo 17.
-130 digits heavy pressure selection circuit. The terminal 31 is a selection timing signal input section for determining the timing at which an input signal is input to the pixel@polar board. , each input a timing signal. Thereby, memory 2
Switch the address within 9. A pressure of 1 is input to the terminal 32 for base coating at multiple levels, and according to the memory contents, an appropriate reference level (ilb) is applied to the amplifier circuit side by the i1 pressure selection circuit 30, thereby R, The purpose is to slightly increase or decrease the G and B signal levels in order to correct the 4-level variation from board to board. The memory 29 has an address setting terminal 3.
3 and a human data dryer 34 are provided, and data is inputted in advance in accordance with the display characteristics of each unit board. This results in
It is possible to correct the gradation difference in the potential substrate 1jil within the large screen, and it is possible to obtain beautiful image quality with no perceived color unevenness.

FIG. 8 shows an example of a voltage selection circuit, in which 36 is a data input section from memory, 36 is a matrix circuit, 3rd transmission gate, 38 reference voltage input terminals, 3
9 is an output terminal for the selected reference voltage.

[Effects] As detailed above, although the large liquid crystal pull color display device of the present invention has a large screen, the seams of the connection parts within one screen are not noticeable, and the resolution can be sufficiently improved. In addition to being able to provide a picture with no color unevenness over the entire display screen, the external wiring becomes very knotty, making it very effective as a large, thin display device.

[Brief explanation of the drawing]

FIG. 1 is an enlarged view of a panel assembly portion of a conventional large-sized display device with a combination of liquid crystal panels. Figure 2 shows the structure of the large liquid crystal full-color display device of the invention.
+1-pX indicates the joint between the electrode groups. 4... Unit substrate 5... T1PT 6 Pixel electrical connection 7... Gate line 8... Source line Figure 3 shows the 1t11 surface (9) at the joint between the pixel electrode substrates.
It is 1. l] - Seal 12 - Connection Figure 4 is an assembled cross-section 1 of the large display device of the present invention. l-...Transparent substrate 14...Pixel electrode substrate 17...Transparent large substrate 18φ/Common electrode 19...Liquid crystal addition/sealing part 21...Color filter η...Linear polarizing film Figure 5 shows common electrode sand Figure 6 shows a conceptual diagram of the assembly of the display device of the present invention. Figure 7 is a diagram of the level rl+?, I adjustment circuit.・Company amplifier circuit 4・◆Level Me King 1/-30・・Voltage selection circuit Figure 8 is an example of a voltage selection circuit. Applicant: Suwa Seikosha Co., Ltd. Figure 3 Figure 4 Figure 6 Figure 7-9 Figure 8

Claims (1)

[Claims] A plurality of transparent TPT active matrix image storage substrates with polished end faces are closely arranged on the @2 transparent substrate, and after connecting the vertical and horizontal drive lines of the TPT at the end faces, the opposing A large liquid crystal pull-color display device in which the whole is sealed using a third transparent large substrate on which a common electrode is formed, and liquid crystal is injected and aligned between the pixel electrode (umbrella and the common electrode). 2. The large-sized liquid crystal full-color notification device according to claim 1, wherein the T 11 T drive line on the substrate is formed so as not to run long in the vicinity of the end face in parallel to the end face.