WO2006015511A1

WO2006015511A1 - A liquid crystal display pannel with a visible cutting accuracy marks

Info

Publication number: WO2006015511A1
Application number: PCT/CN2004/000926
Authority: WO
Inventors: Mengyi Hong
Original assignee: Quanta Display Inc.; Quanta Display Japan Inc.
Priority date: 2004-08-10
Filing date: 2004-08-10
Publication date: 2006-02-16

Abstract

A liquid crystal display panel with a visible cutting accuracy marks is disclosed. A chessboard type mark is formed at intercepted cutting line of two panels. The chessboard type mark have four square marks being a pair of the first square marks in diagonal forms and another pair of the second square marks in diagonal forms respectively. It can be confirmed cutting accuracy of liquid crystal display panel by observing distance between square marks and cutting lines or square marks of residual parts after cutting panel.

Description

Liquid crystal display panel with mark capable of visual cutting precision

The present invention relates to a liquid crystal display panel, and more particularly to a liquid crystal display panel having a mark capable of visually cutting precision. Background technique

Liquid crystal displays have become increasingly popular based on their low power consumption and portability. In general, a liquid crystal display has two parts: a liquid crystal display panel and a backlight module. The liquid crystal display panel mainly comprises a bottom substrate, a top substrate and a liquid crystal material disposed between the two substrates, wherein the bottom substrate has a plurality of thin film transistors, which are generally referred to as "array substrates", and the top substrate has A color filter, commonly known as a "color filter substrate" (liquid crystal display panel is the use of liquid crystal material optical anisotropy (optical anisotropy) and polarization characteristics to display images. Nowadays due to active matrix type liquid crystal display panel ( Active matrix liquid crystal display panel) has high resolution and superiority in displaying dynamic images. It has become the most popular technology product. Multiple gate lines for receiving scanning signals and multiple data lines for receiving data signals are formed. A plurality of pixel regions are defined on the array substrate. A pixel electrode connected to a thin film transistor is formed in each pixel region to supply a voltage to the liquid crystal material. The color filter on the color filter substrate corresponds to the array substrate. These pixel areas on, and this color filter has multiple red, green, and blue times Small) filter. A black matrix (black matrix) is formed on the color filter On-chip, to block the light outside the pixel electrode area, to prevent light from illuminating the thin film transistor. The color filter substrate further includes a common electrode to supply a voltage to the liquid crystal material.

The common electrode and the pixel electrode are respectively formed on the inner side surface of the color filter substrate opposite to the array substrate, and the liquid crystal material is placed in the accommodating space between the two inner side surfaces. A polarizing layer is formed on the outer side of the color filter substrate and the array substrate, that is, the liquid crystal cell is completed. By controlling the magnitude of the voltage supplied to the common electrode and the pixel electrode, the light transmittance of the liquid crystal cell can be controlled, whereby the image can be displayed using the light-shutter effect.

1 is a schematic cross-sectional view of an electronic device 1 having a display function, and the electronic device 1 is housed in a casing 2. The electronic device 1 is provided with a liquid crystal display to provide a display function. To simplify the drawing, the liquid crystal display only depicts the main part, including a backlight and a liquid crystal display panel. The liquid crystal display panel comprises two transparent substrates 3, 4 and a sealing member 5, and a liquid crystal material 6 is interposed between the two transparent substrates 3, 4. The backlight is disposed under the liquid crystal display panel, and the backlight is composed of a backlight board 7 and a light tube 8. The liquid crystal display panel is disposed on a printed circuit board 9, and the backlight is placed under the printed circuit board 9. The printed circuit board 9 has an opening 10 through which light from the backlight passes and enters the liquid crystal display panel. The housing 2 has a window 1 1 corresponding to the display area of the liquid crystal display panel.

One of the key steps in the assembly process of the components of the electronic device 1 is the mechanical alignment accuracy of the liquid crystal display assembled in the housing 2. If the liquid crystal display is assembled in the casing 2, the mechanical alignment accuracy cannot be achieved, and the liquid crystal display will easily fall out of the casing 2. In view of the requirement of mechanical alignment accuracy, a mark is usually arranged at the intersection of the cutting line when cutting the liquid crystal display panel for checking the cutting precision of the liquid crystal display panel. 2 is a schematic plan view of a liquid crystal display panel before cutting, One of the liquid crystal display panels 21 is previously fabricated on a large substrate 20. Each of the boundaries of the liquid crystal display panel 21 is provided with a cutting line 22, and a cross mark 23 is formed at the boundary of the intersecting cutting lines 22. 2A is a partial enlarged view of FIG. ₂ , after the liquid crystal display panel 21 is cut, the cutting precision of the liquid crystal display panel 21 is confirmed by measuring the distances <^ and 1 _{2 of} each of the cutting lines 22 and the residual cross-shaped mark 23. However, the design of such a cutting mark requires a measurement operation, so that the confirmation time is long. In order to avoid the measurement time, another method is to arrange a square mark 24 having the same size and cutting precision as the intersection of the two intersecting cutting lines 22, as shown in Fig. 2B. After the liquid crystal display panel 21 is cut, the distances d ₃ and d _{4 of} each of the cutting lines 22 and the square marks 24 or the remaining square marks 24 are visually inspected to confirm the cutting accuracy. When d ₃ and d _{4 are} smaller than the size of the square mark 24 or the remaining square mark 24 is left on the liquid crystal display panel 21, it is possible to visually judge that the cutting accuracy of the liquid crystal display panel 21 is within an allowable range. Referring to Fig. 3A, however, the design of the square mark 24 having the same size and cutting precision, in the case where the pattern 25 is present at the intersection of the cutting line, the pattern 25 will cover the square mark 24, so that the liquid crystal display panel 21 is cut. After that, the cutting accuracy is not judged. Therefore, this type of mark design is not suitable for the configuration of a liquid crystal display panel with a graphic at the junction of the cut line. Referring to FIG. 3B, for the arrangement of the liquid crystal display panel 21 which is arranged without a pitch (that is, for the left or right of the cutting line or for the display area), after the liquid crystal display panels 21a and 21b are cut, the liquid crystal can be visually inspected. Whether the distances d ₃ and d _{4 of the} display panel 2 la cutting line 22 and the square mark 24 are larger than the size of the square mark 24, but if the distance between the cutting line 22 and the square mark 24 of another side by side liquid crystal display panel 21b is visually checked d ₅ , in fact, the cutting accuracy of the liquid crystal display panel 21b cannot be judged. Therefore, the design of the square mark 24 is also not suitable for the configuration of the liquid crystal display panel without spacing. Shape.

In view of the problems faced by the above-mentioned known techniques, it is urgent to provide a case where the cutting marks can be applied to various liquid crystal display panel configurations. Summary of the invention

The main object of the present invention is to provide a liquid crystal display panel having a mark with visual cutting precision, which is formed with a checkerboard mark at the interface of the panel cutting line for visually confirming the cutting precision of the panel to shorten the liquid crystal display. Manufacturing time course.

Another object of the present invention is to provide a checkerboard type marker disposed at the intersection of a panel cutting line, which is suitable for the case where there is a pattern and no graphics at the intersection of the cutting line, and is suitable for a panel which is arranged at intervals and without spacing. Configuration situation.

According to the above object, an aspect of the present invention provides a plurality of checkerboard symbols on a light transmissive substrate having a plurality of array elements, wherein each array unit corresponds to a display area, and each checkerboard mark is formed on the outer periphery of each array unit. The intersection of two intersecting cut lines; this checkerboard mark has four square marks, a pair of first square marks in a diagonal relationship and another pair of second square marks in a diagonal relationship. Another aspect of the present invention provides a plurality of checkerboard symbols on a light transmissive substrate having a plurality of color filter units, wherein each color filter unit corresponds to a display area, and each checkerboard mark is formed in each color a junction of two intersecting cutting lines at the periphery of the filter unit; the checkerboard mark has four checkered marks, a pair of first checkered marks in a diagonal relationship and another pair of second marks in a diagonal relationship Checkered mark.

By the configuration of the above checkerboard mark, after cutting the panel, the distance between the panel cutting line and the checkerboard square mark or the remaining partial square mark can be observed, and the cutting precision can be directly visually confirmed. In turn, the manufacturing time of the liquid crystal display is shortened. The checkerboard symbol of the present invention is suitable for patterning and no graphics at the interface of the panel cutting line, and can be applied to the layout of the panel with and without spacing.

The objectives and many advantages of the present invention will become more apparent from DRAWINGS

1 is a schematic cross-sectional view of a prior art electronic device having a display function;

2 is a plan view showing a liquid crystal display panel formed on a large substrate; FIG. 2A is a partially enlarged schematic view of FIG.

2B is an enlarged schematic view showing a portion of a liquid crystal display panel having a square mark;

3A is an enlarged schematic view showing a portion of a liquid crystal display panel having a square mark and a cut line at a junction;

3B is a partial schematic view of a liquid crystal display panel arranged without spacing;

4 is a schematic cross-sectional view of a liquid crystal display panel;

Figure 5 is a plan view showing a first embodiment of the present invention;

Figure 5A is a partial enlarged view of Figure 5;

Figure 6A is a partially enlarged schematic view showing a second embodiment of the present invention;

Figure 6B is a partially enlarged schematic view showing a third embodiment of the present invention;

7A and 7B are diagrams showing variations of the checkerboard symbol of the present invention;

8A is a schematic perspective view showing a manufacturing process of a liquid crystal display panel in a non-pitch arrangement by a one drop filling method; FIG. 8B is a perspective schematic view of the liquid crystal display panel formed by the liquid crystal dropping type implantation method of FIG. 8A;

Fig. 8C is a perspective view showing a plurality of liquid crystal display panels formed after the liquid crystal display panel of Fig. 8B is cut. Part symbol description

1 electronic device 2 housing

3, 4 transparent substrate 5 sealing element

6 liquid crystal material 7 backlight board

8 tube 9 printed circuit board

10 opening 11 window

20, 21a, 21b large substrate

22 cutting line

23 cross mark 24 square mark

25 Graphics 40 LCD panel

41 pixels

42, 43 transparent substrate

44 red, green and blue filter units

45 Liquid crystal material 46 Transparent electrode

47 Alignment layer 48 sealing element

49 accommodating space 50 large substrate

52 liquid crystal array substrate 53 cutting line 54 checkerboard mark

541, 542 square mark

55 Array unit 56 graphics

80 bottom transparent substrate 82 top transparent substrate

80a, 80b, 80c, 80d bottom transparent substrate

82a. 82b, 82c, 82d top transparent substrate

83 main seal 84 virtual seal

85 LCD 86, 87 cutting line

800a, 800b, 800c, 800d liquid crystal display panel

Before describing in detail the liquid crystal display panel of the present invention having a checkerboard mark with visual cutting precision, the main internal components of a liquid crystal display panel will be briefly described as follows. 4 is a schematic cross-sectional view of a simplified liquid crystal display panel 40. The plurality of pixels 41 of the liquid crystal display panel 40 are arranged in a matrix pattern and formed on a pair of glass-like transparent substrates 42 and 43. between. The light-transmitting substrate 42 is generally referred to as a color filter substrate, and a red, green, and blue sub-filter unit 44 is formed on each of the pixels on the inner side surface thereof. The light-transmitting substrate 43 is generally referred to as an array substrate, and a plurality of thin film transistors (not shown) are formed on the inner surface thereof, corresponding to each of the pixels 41. The liquid crystal material 45 that produces each of the pixels 41 is sealed between the light-transmitting substrates 42 and 43. A plurality of transparent electrodes 46 are formed on the inner surfaces of the transparent substrates 42 and 43 for supplying an electric field to the liquid crystal material 45. In addition, an alignment film 47 for aligning the liquid crystal material 45 of each of the pixels 41 is formed on the inner sides of the transparent substrates 42 and 43, respectively. Above the surface, and covering the transparent electrode 46. The light-transmitting substrates 42 and 43 are superposed on each other by the sealing member 48, and an accommodation space 49 is formed therebetween to seal the liquid crystal material 45 in the accommodating space 49.

Figure 5 is a plan view showing a first embodiment of the present invention in which a liquid crystal array substrate 52 is formed on a large substrate 50. Although only one liquid crystal array substrate 52 is shown in Fig. 5, in the first embodiment, a plurality of liquid crystal array substrates 52 are arranged in a spaced arrangement on the large substrate 50. In the first embodiment, a cut line 53 is formed at each boundary of the liquid crystal array substrate 52 such that adjacent cut lines 53 intersect at two and two, and a checkerboard is formed at the intersection of the two intersecting cut lines 53. Style symbol 54. As described above, the liquid crystal array substrate 52 is a light transmissive substrate having a plurality of array units 55 (e.g., a plurality of thin film transistors), such as a glass substrate. Each array unit 55 corresponds to a display area, that is, a pixel area. This disc type mark 54 has the same size as the cutting precision, and it can be formed on the surface of the liquid crystal array substrate 52 having the array unit 55 or on the other surface of the liquid crystal array substrate 52 of the opposite array unit 55. When the checkerboard mark 54 is formed on the surface of the liquid crystal array substrate 52 having the array unit 55, the checkerboard mark 54 can be simultaneously formed during the manufacturing process of the liquid crystal array substrate 52, for example, forming a source during the manufacturing process of the thin film transistor. The bungee is simultaneously formed with a checkerboard mark 54. The checkerboard symbol 54 has four checkered symbols, a pair of first checkered symbols 541 in a diagonal relationship and another pair of second checkered symbols 542 in a diagonal relationship; wherein the first checkered mark Preferably, 541 has a first pattern and second square mark 542 preferably has a second pattern to distinguish it from the first square mark.

5A is a partial enlarged view of FIG. 5, after the liquid crystal array substrate 52 is cut, the square of each cutting line 53 and the checkerboard symbol 54 of the liquid crystal array substrate 52 can be directly visually inspected. The distance between the symbols 541 and 542 and L2. When L2 is smaller than the square mark 541 or 542 size, it can be confirmed that the cut liquid crystal array substrate 52 is within the cutting precision. Alternatively, when it is directly observed that a part of the square mark 541 or 542 remains on the liquid crystal array substrate 52, it is also possible to directly confirm that the cut liquid crystal array substrate 52 is within the cutting precision.

6A is a partially enlarged plan view showing a second embodiment of the present invention, or is a view

5, wherein the liquid crystal array substrate 52 is formed on the large substrate 50, and a pattern 56 is formed at the boundary of the liquid crystal array substrate 52 such that the intersection of the intersecting cutting lines 53 has a pattern 56. In the second embodiment, the checkerboard indicia 54 is formed at the intersection of the two cutting lines 53 having the graphic 56, while the checkerboard indicia 54 is not covered by the graphic 56. After the liquid crystal array substrate 52 is cut out from the large substrate 50, the distance L between each of the cutting lines 53 of the liquid crystal array substrate 52 and the first square mark 541 and the second square mark 542 of the checkerboard symbol 54 can be visually inspected. ₃ and L ₄ , it is directly determined whether L ₃ and L ₄ are larger than the size of the first square mark 541 and the second square mark 542, and the cutting accuracy of the liquid crystal array substrate 52 is confirmed. Alternatively, when it is directly observed that a part of the first square mark 541 or the second square mark 542 remains on the liquid crystal array substrate 52, it is also possible to directly confirm that the cut liquid crystal array substrate 52 is within the cutting precision.

6B is a partially enlarged plan view showing a third embodiment of the present invention. In the third embodiment, a plurality of liquid crystal array substrates 52 are disposed on the large substrate 50 in a non-pitch arrangement so as to make a plurality of liquid crystals. The array substrates 52a, 52b, 52c, and 52d are arranged on the large substrate 50 in a non-pitch arrangement. In the third embodiment, the checkerboard mark 54 is formed at the intersection of the two intersecting cut lines 53. After the adjacent liquid crystal array substrate is cut from the large substrate 50, the liquid crystal array substrates 52a, 52b can be visually inspected, respectively. 52c and 52d and Whether the distances ld, k ₂ , k ₃ , k ₄ , k ₅ , k ₆ , k _{7 ,} and k ₈ of the first check mark 541 and the second check mark 542 of the checkerboard symbol 54 are smaller than the first check mark 541 Or the size of the second square mark 542 can confirm the cutting precision of the liquid crystal array substrate after cutting. Alternatively, when it is directly observed that a part of the first square mark 541 or the second square mark 542 remains on the liquid crystal array substrates 52a, 52b, 52c and 52d, it is also possible to directly confirm that the cut liquid crystal array substrate is in cutting precision. Inside.

Alternatively, the pattern design of the checkerboard symbol 54 of the present invention may be a variation as shown in FIG. 7A, having a first pattern and a second pattern, or a variation as shown in FIG. 7B, having a first color. Bottom (such as red) and a second base (such as green).

On the other hand, the checkerboard mark 54 of the present invention can also be formed on the color filter substrate of the liquid crystal display panel which has not been cut. As shown in FIG. 4, the color filter substrate has a plurality of color filter units, each color filter unit includes a plurality of red, green, and blue sub-filter units, and corresponds to a display area, and each color filter Each boundary of the unit has a cutting line such that adjacent cutting lines intersect two by two. A checkerboard mark 54 is formed at the intersection of the two intersecting cut lines, and it may be formed on the surface of the substrate having the color filter unit or on the other surface of the substrate of the opposite color filter unit. When the checkerboard mark 54 is formed on the surface of the substrate having the color filter unit, the checkerboard mark 54 can be formed simultaneously in the manufacturing process of the color filter substrate. Alternatively, the checkerboard pattern 54 is formed on the color filter substrate. In the above case, it can be applied to the arrangement of the color filter substrate arranged at a pitch or a non-pitch and the intersection of the color filter substrate cutting line. Graphic or no graphics.

Another aspect of the present invention provides a liquid crystal display panel (see FIG. 4) having a mark capable of visually cutting precision, comprising a first transparent substrate, a second transparent substrate, a liquid crystal material, A plurality of sealing elements and a plurality of electrodes. a plurality of array units and a plurality of checkerboard first marks are formed on the first transparent substrate, each array unit corresponding to a display area, and each edge of each array unit has a cutting line to make adjacent The cutting lines intersect at two and two, and each checkerboard first mark is formed at the intersection of two intersecting cutting lines. The first type of the checkerboard has four square marks, which are diagonal pairs of first squares. The token and another pair of second squares in a diagonal relationship. The plurality of color filter units are formed on the second transparent substrate, and each of the color filter units corresponds to an array unit. Similarly, each of the color filter units has a cutting line at each boundary to enable adjacent cutting. The lines intersect at two and two, and a second checkerboard mark is placed at the junction of the intersecting lines for cutting. The checkerboard second token has four square markers, a pair of third-party grid marks in a diagonal relationship and another pair of fourth square markers in a diagonal relationship. An accommodating space is disposed between the second transparent substrate and the first transparent substrate, and the accommodating space is overlapped with the first transparent substrate to overlap each other. The liquid crystal material is placed in the accommodating space between each pair of array units and the color filter unit, and different voltages can be applied to control the light passing through the liquid crystal material. The plurality of sealing elements are disposed between each pair of array units and the color filter unit for sealing the liquid crystal material. The plurality of electrodes are respectively formed on the first transparent substrate and the second transparent substrate corresponding to each pair of array units and the color filter unit to apply a voltage to the liquid crystal material. When cutting, the cutting depth of the first transparent substrate portion can be cut first, then the second transparent substrate is cut, and then the entire panel is stressed, and the unit display panel corresponding to each display area can be disconnected.

Alternatively, the array unit may be arranged in a spaced arrangement or a non-pitch arrangement on the first transparent substrate. Hereinafter, a method of manufacturing a liquid crystal display panel having a non-pitch arrangement will be exemplified by FIGS. 8A to 8C. Figure 8A is a liquid drop dropping method (One Drop Fill Method, ODF) A schematic perspective view of a manufacturing process step of fabricating a liquid crystal display panel having a non-pitch arrangement, wherein the bottom transparent substrate 80 has a plurality of array elements formed thereon, and each array unit corresponds to a display area top transparent substrate 82 has a plurality of color filter units formed thereon, and each color filter unit corresponds to an array unit. A plurality of main sealants 83 and a dummy sealant 84 are formed on the bottom transparent substrate 80, and the liquid crystal 85 is injected thereon to form a liquid crystal layer. The main sealing member 83 serves to prevent liquid crystal from flowing out and to bond the bottom transparent substrate 80 and the top transparent substrate 82 together. A dummy seal 84 is formed on the periphery of the main seal 83 to protect the main seal 83. The liquid crystal dropping type injection method is to form a liquid crystal layer on the bottom transparent substrate 80 before the bottom transparent substrate 80 and the top transparent substrate 82 are not joined together. FIG. 8B is a perspective schematic view showing the liquid crystal layer formed by liquid crystal dropping method, and the bottom transparent substrate 80 and the top transparent substrate 82 are joined together, that is, a perspective view of the liquid crystal display panel formed by the liquid crystal dropping method. . In FIG. 8B, the top transparent substrate 82 and the bottom transparent substrate 80 are formed with cutting lines 86 and 87 which intersect each other. The dicing lines 86 and 87 divide the plurality of array elements on the bottom light transmissive substrate 80 into a plurality of array units 800a, 800b, 800c and 800d arranged without distance. In the present invention, a checkerboard mark can be formed at the intersection of the cutting lines 86 and 87 for visual cutting precision, and cut along the cutting lines 86 and 87 to obtain a plurality of liquid crystal display panels, as shown in Fig. 8C. Alternatively, the cut line boundary of each array unit may have a graphic or no graphic presence. The first check mark of the checkerboard first mark may have a first pattern and the second check mark may have a second pattern, or the first check mark has a first color base and the second check mark has a second color bottom. Similarly, the third-party mark of the checkerboard second mark may have the third pattern and the fourth check mark may have the fourth pattern, or the third-party mark has the third color base and the fourth square mark has the first Four-color bottom.

In summary, the present invention provides a liquid crystal display panel having a checkerboard mark with visual cutting accuracy, 'this checkerboard mark is formed at the intersection of two intersecting cutting lines of the liquid crystal display panel, and the checkerboard mark has four squares. The token is a pair of first square markers in a diagonal relationship and another pair of second square markers in a diagonal relationship. After the panel is cut, the panel cutting accuracy can be confirmed by observing the distance between the square mark and the cutting line or the remaining partial square mark, thereby shortening the manufacturing time of the liquid crystal display panel. The cutting accuracy of the panel can be directly visually inspected by the checkerboard symbol of the present invention, and the design of the checkerboard symbol is suitable for the case where there is a graphic and no graphic at the intersection of the cutting line, and is suitable for the panel with and without spacing. Configuration situation.

The effects and advantages of the present invention are described in detail by the above-described embodiments, but are not intended to limit the scope of the present invention. Therefore, equivalent changes and modifications of the shapes, structures, features, and spirits of the present invention are intended to be included within the scope of the appended claims.

Claims

Rights request

An array substrate for a liquid crystal display panel, comprising:

a light transmissive substrate;

Forming a plurality of array elements on the transparent substrate, each array unit corresponding to a display area, and each boundary of the array unit has a cutting line so that adjacent cutting lines intersect two by two;

a plurality of checkerboard marks, each of which is formed at a junction of two intersecting cut lines, the checkerboard mark having four checkered marks, a pair of first square marks in a diagonal relationship and Another pair of second squares in a diagonal relationship.

The array substrate for a liquid crystal display panel according to claim 1, wherein the array unit is arranged in a non-pitch arrangement on the transparent substrate.

The array substrate for a liquid crystal display panel according to claim 1, wherein the intersection of the dicing lines has a pattern.

The array substrate for a liquid crystal display panel according to claim 1, wherein the first square symbol has a first pattern and the second square symbol has a second pattern.

The array substrate for a liquid crystal display panel according to claim 1, wherein the first square symbol has a first color base and the second square symbol has a second color base.

.

6. A color filter substrate for a liquid crystal display panel, comprising:

a light transmissive substrate;

Forming a plurality of color filter units on the transparent substrate, each color filter unit corresponding to a display area, and each boundary of the color filter unit has a cutting line to make adjacent The cutting lines intersect two by two; and

The color filter substrate for a liquid crystal display panel according to claim 6, wherein the color filter unit is arranged on the light-transmissive substrate without a pitch.

The color filter substrate for a liquid crystal display panel according to claim 6, wherein the cut line boundary has a pattern.

The color filter substrate for a liquid crystal display panel according to claim 6, wherein the first square symbol has a first pattern and the second square symbol has a second pattern.

The color filter substrate for a liquid crystal display panel according to claim 6, wherein the first square symbol has a first color base and the second square symbol has a second color base.