TW504601B - Active matrix type liquid crystal display device - Google Patents

Abstract

An active matrix type liquid crystal display device comprises a thin film transistor panel and a color filter panel with liquid crystals holding in between. Multiple protrusions are formed on the color filter panel to define the panel gap. The protrusion is made from the column composed of three color filter films laminated to display color for pixel elements. The protrusions provide uniform gap between different panels and excellent picture quality because no spacing grains are contained among liquid crystals.

Description

504601 V. Description of the invention (1) " The present invention relates to an active-array liquid crystal display device, particularly to a pole structure and a transparent panel in a liquid crystal display. A conventional active-array liquid crystal display device generally includes a pair of transparent panels, including: an active-array panel, a switch-off transistor (thin-film transistor) and a pixel 2-pole, and a color filter panel. The two panels are packaged together with one panel = two, with the liquid crystal layer sandwiched between them. The liquid crystal is injected between the panels under reduced pressure. The gap between the panels is first subjected to negative pressure. Then, the entrance of the two or two electrodes is immersed in the liquid crystal, and the liquid crystal is slowly introduced into the panel gap because the panel gap is different from the & ^ Φ ί ΐThe liquid crystal display device controls the light transmittance of the liquid crystal by applying a voltage between the two panels in order to rotate the liquid crystal molecules between the two panels. ^: Recently, some liquid crystal display devices use a lateral electric field. In a liquid crystal display with a transverse electric field, two electrodes are arranged in a panel to obtain a transverse electric field parallel to the panel to control the transmissivity of the liquid crystal. In the liquid crystal display device, there are a large number of such as glass or plastic flutes scattered in the panel gap1 to define the distance between the panels ". The first figure is a cross-sectional view of the display panel structure. The active array panel 1 has- A substrate (thin film transistor substrate) u, on which a thin film transistor 25 is made: a pixel electrode 33; a color filter panel (or a corresponding panel) has a 2 substrate 12 with a panel gap therebetween to retain spherical spacers 3 4 and Liquid crystal 1 9. Near the periphery of the spherical spacers 34, the long axis of the liquid crystal molecules will be arranged along the shape of the spherical spacers 34, and when the black is desired to be displayed via the spacers ^

Page 4 504601 V. Description of the invention (2) Peripheral liquid crystal On the other hand, in order to improve the vision, the precise gap is planted in the color filter. The cross-sectional view in FIG. 2A shows that the color filter 20 is applied to the day element zone layer 21 and the stem is located in front of the crystal display and placed in the middle of the central region where the lift is difficult to uniformly. difference. The choice of light causes the contrast and day quality of the display device to deteriorate. Twenty-two: The screen size of the device has been developed to become larger and larger, and it is difficult to maintain spacers between the panels in the size screen. = Gazette JP_A_2 (1 994), 891 " Proposed one is two i. The column of the liquid crystal display device 2B g__ out of the color display of the liquid crystal display device of the LCD panel is not the top view. A plurality of color filters are formed on the two pixel regions, and a lattice-shaped light-shielding layer 21 is formed, and a pole made of a material for light-shielding light "f: color light-reflecting film 20." The intersection of the strips. In the proposed liquid A pair of panels, the peripheral edges of the panels are used to connect. =: The display is set in the display. In fact, when the liquid crystal is injected, the gap between the panels results in the edges of the panels after the connection. The area is large. This gap difference can be corrected in the additional step of sealing the liquid crystal injection to tighten the pressure on the panel surface. However, the force may cause the panel gap to be unbalanced, resulting in a change in the color image of the display panel, and thus the brightness and color of the picture. Qualitative change Therefore, an object of the present invention is to provide a main circuit between a thin film transistor panel and a color phosphor panel: for a uniform gap, which can reduce the change in brightness and color image. An array liquid crystal display device includes: a first and a reverse, and a liquid crystal, sandwiched between the first transparent panel and the second transparent

504601 V. Description of the invention (3) Between the panels; wherein the first transparent panel includes: a plurality of day element elements arranged in an array, and each of the pixel elements defines a day element area for displaying an image, and has a A switching transistor and an associated day element; a plurality of scanning lines, each connected to the gate of the switching transistor in the day element in the same row; and a plurality of signal lines, each passing through the switching transistor Connected to the pixel electrodes of the pixel elements on the same line; and the second transparent panel includes a light-shielding layer for covering the day when the first and second transparent panels are viewed in a vertical direction Areas other than the prime area; plural colored layers, each corresponding to one of these day element elements to form a color filter; plural poles, made on the light-shielding layer, and each such pole is in the color filter A protrusion is formed on the surface of the sheet panel; and a fixing layer is formed on the top surface of the protrusion to connect the first panel and the second panel together. According to the active array liquid crystal display device of the present invention, a fixing layer is formed on the top surface of the pole, without using spherical spacers, providing a uniform gap between the panels, and obtaining excellent daylight quality on the screen of the display panel. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is described below in detail with the accompanying drawings as follows: [Schematic description of the drawings] FIG. 1 2A and 2B are cross-sectional views and a top view of another conventional active-array liquid crystal display device panel;

504601

FIG. I is a cross-sectional view showing a panel of an active matrix liquid crystal display device according to a first embodiment of the present invention; FIG. 4 is a partial top view of a thin crystal panel of the active matrix liquid crystal display device shown in FIG. 3; FIG. 5 is a detailed cross-sectional view of the panel of FIG. 3; and FIG. 6 is a partial top view of a thin film transistor panel of an active matrix liquid crystal display panel according to a second embodiment of the present invention. [Symbol description] 11 ~ thin film transistor substrate; 11 ~ thin film transistor panel; 12 ~ color filter substrate; 1 2 A ~ color filter panel; 1 3 ~ gate line; i 4 ~ drain line ; 15 to polycrystalline silicon layer; 16 to gate insulation layer; 18 c to second alignment film; 18 T to first alignment film; 19 to liquid crystal; 20 to color filter; 2 1 ~ Light-shielding layer; 2 2 C ~ transparent insulating layer; 2 2 T ~ transparent insulating layer; 2 3 C ~ polarizer; 2 3 T ~ polarizer; 2 4 ~ solid layer; 25 ~ thin film transistor; 26 ~ rod Column; 27 ~ daylight region; 28 ~ sealing layer; 29 ~ common electrode; 29a ~ common electrode base; 29b ~ common electrode strip; 30 ~ daylight electrode; 30a ~ daylight electrode base; 30b ~ pixel electrode strip 32 ~ transparent conductive layer; 32C ~ transparent conductive layer; 32T ~ day element transparent conductive layer; 33 ~ day element electrode; 34 ~ spherical spacer. [Embodiment] Please refer to FIG. 3, which shows an active-array liquid crystal display device according to a first preferred embodiment of the present invention including: a thin-film transistor panel. A has a plurality of daylight elements arranged in an array; The transparent corresponding panel (color filter panel) 12A has a shape filter, and a liquid crystal layer 19 is sandwiched between the two panels 11 A and 12 A. Color filter and light panel 1 2 a

Page 7 504601 V. Description of the invention (5) ^ 2 6 to ensure the gap between the two panels 11 a and 丨 2 A designed. Each pole is connected to the thin-film transistor panel 11A by a fixing layer 24 formed on the top of each pole 26; and a frame layer 28 is used to seal the liquid crystal layer 19 in the panel space.

As shown in Fig. 4, details of a daylight element made on a thin film transistor panel 丨 a are shown. The thin film transistor panel A has a plurality of gate lines 1 3 each placed on a corresponding column of the day element and a plurality of drain lines 4 each placed on a corresponding row of the day element. The day element is placed in a rectangular area defined by adjacent gate lines 丨 3 and drain lines 丨 4. The day element includes a thin film transistor 25 having a gate connected to the corresponding gate line 3 and a drain connected to the corresponding drain line 14; and a pixel electrode 33 connected to the thin film transistor holder. The source electrode, the pheromone electrode 33 defines a pheromone region (2) in the pheromone display image.

Please refer to FIG. 5, which is an enlarged cross-sectional view of the liquid crystal display device in FIG. 3. Thin-film transistor panel A has a thin-film transistor substrate. One is continuous when viewed from the top surface of the substrate, and is used as the gate line of the first layer of internal wiring. 6. A polycrystalline silicon layer 15 for forming a source / drain of a thin film transistor 2 5 and a drain line 14 ′ as a second internal interconnection 14 and a transparent conductive layer 32 as a pixel electrode , A transparent insulating layer 22T, and a first alignment film 18T. The thin film transistor panel nA also has a polarizer Mi located on the lower surface of the thin film transistor substrate 11. The color filter and light panel 1 2 A has a color filter substrate 12. One is continuous when viewed from the lower surface of the substrate, forming a grid shape, and a light-shielding layer 2 1 ′ made of resin. The completed color filter 20 (20a, 20b, and 20c) 'is a transparent conductive layer we which is a corresponding electrode or a common electrode,

Page 8 504601 V. Description of the invention (6): " = and a second alignment film 18C. The color filter panel 12A also has a polarizer 23C on the upper surface of the color filter substrate 12. The liquid crystal layer 9 is sandwiched = between the first alignment film 18T and the second alignment film 18 (.). A plurality of poles 26 are made on the shirt color satin panel 12A. The poles 26 are color-filtered outside the daylight region. The laminate of the films 20a, 20b, and 20c is made to be inserted between the light-shielding layer 21 and the transparent insulating layer 2 2C. The second alignment film 18c has a protrusion at the position where each pole 26 is placed. The protrusion or the first The top ends of the rod columns 26 of the two alignment films 18c are connected to the first alignment film 18τ of the thin-film transistor panel 11A by an anchoring layer 24. The degree of the cup columns 26 is that of the color filter films 20a, 20b, and 20c. The total thickness of the sheet and the thickness of the light-shielding layer 21. The color filter films 20a, 20b, and 20 (^ correspond to the three primary colors of red, green, and blue. Each color filter film has a thickness of The thickness is 0.5 micron, so the total height of the pole 26 is 3.5 micron. By adjusting the total thickness of the red, green and blue color filters and the thickness of the light shielding layer 21, the pole 26 can be adjusted to any Height. The pole 26 may be located at each intersection of the horizontal bar and the vertical bar of the light shielding layer 21. The fixing layer 2 4 is located on the color filter panel 1 2 A. The alignment film 1 8 c is made at the top of each post after the brushing action. The frame sealing layer 2 8 is generally made to define the shape of the frame, which contains the use of a dispersion process to control the thin film electricity. Spacer grains between the crystal panel 11A and the color light-reflective sheet panel 12a. The anchoring layer 24 is made at the same time by the dispersion process and the frame sealing layer 28. The anchoring layer 24 is the same as the frame sealing layer 28 except for the spacers After the fixing layer 24 is made on the second alignment film 18C, the thin film transistor panel 11A and the color filter panel 12A are bonded together, and then the fumigation fixing layer 24 is heated. The heating fumigation is widely used Used for fumigation frame 28.

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The trial manufacture of a liquid crystal display device according to the first preferred embodiment of the present invention is used for a gap test and a characteristic test. The test results show a uniform gap between faces and small color image changes. Because the structure fluid contains spherical spacers, the problem of light leakage is reduced and the daytime surface is rough. The transparent insulation layer 22C made on the color filter panel 12A can be made of 醯 imine resin, acrylic type. Resin, inorganic silicon oxide, inorganic: and similar materials. Since the fixing layer 24 is made of plastic material on the top of the pole 26, the thickness of the fixing layer 24 can be ignored after the thin film transistor panel nA and the color filter panel 12A are bonded together. Therefore, the thickness of the anchor layer = does not affect the panel gap. 9 Please refer to FIG. 6, which shows an active-array liquid crystal display device according to the second preferred embodiment of the present invention. The structure is similar to the first preferred embodiment except that the pixel electrode and the common electrode structure of the electric field can be obtained. . In this example, the pixel electrode 3 of the f element element has a base element base 30 and a source connected to the thin film transistor 25, and a plurality of element electrode strips 30b are horizontally drawn to each other. The element electrode base 30a extends. The common electrode 29 of each pixel element has: a dipole base 29 & a pixel electrode strip 炻 extending away from the thin film transistor 25 near the edge of the day element element, and a plurality of common electrode strips 29b and the day element electrode 30? The mutual electric field is placed in the wrong element / the electric field in which the celestial electrode 30 and the common electricity are parallel to the thin film transistor panel 11A. The other structures including the arrangement and material of the rods are similar to those of the first preferred embodiment. The test piece of the liquid crystal display device according to this === preferred embodiment also shows a gap and bismuth with excellent surface uniformity], from 504601 V. Description of the invention (8) Small afterimage. Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make changes and retouches without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the attached patent application.

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Claims (1)

504pi ------, Bulletin, _ Απ declared patent scope-1. An active array liquid crystal display device, comprising: a first and a second transparent panel; and a liquid crystal, sandwiched between the first transparent panel and the Between the second transparent panels; wherein the first transparent panel includes: a plurality of pixel elements arranged in an array, and each of the day element elements defines a day element region for displaying an image, and has a switching transistor and a Associated diurnal electrodes; multiple scanning lines, each connected to the gate of the switching transistor in the diurnal elements on the same column; and multiple signal lines, each connected to the same row via the switching transistor And the second transparent panel includes: a light-shielding layer for covering the outside of the daylight region of the first and second transparent panels when viewed in a vertical direction; Area; a plurality of colored layers, each corresponding to one of the daylight elements to form a color filter and a light filter; a plurality of poles made on the light-shielding layer, and each of the poles on the color filter panel table A projection formed; and a fixing layer formed on the top surface of the protrusion, the coupling together the first panel and the second panel. 2. The active array liquid crystal display device described in item 1 of the application scope, wherein each of the poles is made of the material of the color layer. 3. The active-array liquid crystal display device described in item 1 of the scope of application, Page 12 504601 Page 13