CN109254438B

CN109254438B - Liquid crystal display panel and manufacturing method thereof

Info

Publication number: CN109254438B
Application number: CN201811182457.3A
Authority: CN
Inventors: 罗忠云
Original assignee: TCL Huaxing Photoelectric Technology Co Ltd
Current assignee: TCL Huaxing Photoelectric Technology Co Ltd
Priority date: 2018-10-11
Filing date: 2018-10-11
Publication date: 2021-12-03
Anticipated expiration: 2038-10-11
Also published as: CN109254438A

Abstract

The invention provides a liquid crystal display panel, which comprises a TFT substrate and a CF substrate, wherein a first group of group-to-group marks are arranged on the TFT substrate, and comprise a first mark and a second mark; the CF substrate is provided with a second group pair mark, the CF substrate comprises a lower first mark, a lower second mark, a lower first mark and a lower second mark, wherein the lower first mark is correspondingly arranged under the lower first mark, the side edge of the first mark is parallel and level with the side edge of the lower first mark, the lower second mark is correspondingly arranged under the lower second mark, and the side edge of the lower second mark is parallel and level with the side edge of the lower second mark. The invention has the advantages that the novel pair-assembling marks are arranged on the TFT plate and the CF plate, and the pair-assembling mode between the pair-assembling marks arranged on the TFT plate and the CF plate is further improved, so that the pair-assembling precision can be easily read on a machine table or any place, and the pair-assembling precision can be read without moving the display panel after assembling to a high-power microscope.

Description

Liquid crystal display panel and manufacturing method thereof

Technical Field

The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal display panel.

Background

The Thin Film Transistor liquid crystal display panel is composed of a Thin Film Transistor (TFT) and a Color Filter (CF), wherein the TFT substrate and the CF substrate are arranged in an up-down opposite mode, the pair accuracy of the TFT substrate and the CF substrate is related to the quality of a product, and if the TFT substrate and the CF substrate are staggered from top to bottom, light leakage of pixels of the panel is influenced to cause picture whitening, and the yield of the product is further influenced.

As shown in fig. 1, in the conventional lcd panel structure, a first process of the CF substrate 100 is to form a Black Matrix (BM) 200, the BM 200 forms a light shielding structure of a pixel region, and a pair mark 300 made of the same material as the BM 200 is formed at the periphery of the pixel region to provide an alignment reference when the CF substrate 100 is paired with a TFT substrate.

As shown in fig. 2, the CF substrate 100 is located on the TFT substrate, and generally the accuracy of the pair combination of the CF substrate 100 and the TFT substrate is confirmed under the high power microscope by the pair combination mark 300 around the panel, the TFF substrate pair combination mark 301 and the CF substrate pair combination mark 302 are in staggered trapezoidal relative fit, after the CF substrate 100 and the TFT substrate are combined, the TFF substrate pair combination mark 301 and the CF substrate pair combination mark 302 are overlapped, and then the pair combination mark with the highest overlapping degree of the two

pair combination marks

301 and 302 is read under the high power microscope, which is the accuracy of the pair combination corresponding to the upper and lower substrate combination boxes.

The pair accuracy of the prior art needs to be read out only by specifically identifying which pair mark on the TFT substrate and the CF substrate is aligned most accurately on a high power microscope, and the quick exception handling of the product is seriously influenced by the errors of operation and identification. Especially, when the size of the panel is too large and the microscope is too small, the situation that the microscope cannot be corresponded is generated, the group-assembling precision cannot be easily read out on the machine, and the group-assembling precision identification efficiency is reduced.

Disclosure of Invention

The invention aims to improve the requirement of quickly confirming the accuracy of the paired TFT substrate and CF substrate, and aims to monitor the accuracy of the paired box of the TFT substrate and the CF substrate more quickly and accurately, the accuracy of the paired box can be read out without moving to a high-power microscope table, and the accuracy of the paired box can be easily read out at the table and any place.

In order to achieve the above object, the present invention provides a liquid crystal display panel, which includes a TFT substrate and a CF substrate, wherein a first group pair mark is disposed on the TFT substrate, and the first group pair mark includes an upper first mark and an upper second mark; be provided with the second group on the CF base plate and organize the mark, it includes first sign down, second sign down, first mark down, second mark down, wherein first mark corresponds the setting down under the first sign, and the side of first mark with the side parallel and level of first sign down, the second mark corresponds the setting down under the second sign, and the side of second mark with the side parallel and level of second sign down. When the TFT substrate and the CF substrate are paired, the first group of the TFT substrate is paired with the first group of the CF substrate, the upper first mark of the first group of the TFT substrate is covered on the lower first mark and the lower first mark of the CF substrate, the upper second mark of the first group of the TFT substrate is covered on the lower second mark and the lower second mark, wherein the lower first mark is exposed outside the upper first mark if the upper first mark is not completely covered on the lower first mark, and the accuracy of the group pairing between the TFT substrate and the CF substrate is determined by identifying whether the lower first mark or the lower second mark is exposed.

In an embodiment of the present invention, the first group pair group mark includes an upper third identifier and an upper fourth identifier; the second group pair group mark comprises a lower third mark, a lower fourth mark, a lower third label and a lower fourth label which correspond to the upper third mark and the upper fourth mark.

Further, the upper first mark and the upper second mark are arranged at equal intervals, the lower first mark and the lower second mark are also arranged at equal intervals, and the interval between the upper first mark and the upper second mark is larger than the interval between the lower first mark and the lower second mark.

Further, the length of the upper first mark is equal to or greater than the sum of the lengths of the lower first mark and the lower first label.

Further, the width of the upper first mark is equal to the width of the lower first mark.

Further, the distance between the upper first mark and the upper second mark is 10-20 um; the interval between first sign and the second sign down is 10~20um down.

Further, wherein the distance between the upper first mark and the upper second mark is larger than the distance between the lower first mark and the lower second mark by 1-3 um.

Further, wherein the first group pair group flag further comprises a third flag; the second group pair group mark comprises a lower third mark and a lower third label which correspond to the upper third mark; wherein the distance between the upper second mark and the upper third mark is larger than the distance between the lower second mark and the lower third mark by 1-3 um.

Further wherein said upper first marker is a metal.

Further, the width of the number of the lower first label and the lower second label is 1 um.

The invention has the advantages that the novel group-combining marks are arranged on the TFT plate and the CF plate, so that the group-combining mode between the group-combining marks arranged on the TFT plate and the CF plate is improved, the group-combining precision can be easily read on a machine table or any place, the group-combining precision can be read without moving the display panel after the group-combining to a high-power microscope, the visual management of the product quality is improved, the product monitoring process capability is optimized in the aspect of product design, the product quality is improved, the product diversity is facilitated, the product cost is reduced, and the product competitiveness in the market is improved to a certain extent.

The improvement is important for a large-size display panel, because the situation that the panel is too large and the microscope is too small often occurs, so that the panel and the microscope cannot correspond to each other, the group accuracy quality of a monitoring product is improved more quickly and accurately, and the potential safety hazard that the large-size panel needs to be moved under the high-power microscope to read the group accuracy is reduced.

Drawings

FIG. 1 is a schematic diagram of a CF substrate of a conventional LCD panel;

FIG. 2 is a schematic diagram of a prior art TFT substrate after group-by-group marking and CF substrate group-by-group marking;

FIG. 3 is a top view of a first set of group signatures according to one embodiment of the present invention;

FIG. 4 is a top plan view of a second set of group signatures in accordance with one embodiment of the present invention;

fig. 5 is a top view of a TFF substrate pair set flag and a second pair set flag pair set according to an embodiment of the present invention.

Wherein:

100. CF substrate, 200, black matrix, 300, pair group mark,

301. TFF substrate pair group mark, 302, CF substrate pair group mark,

1. a first group pair group flag, 2, a second group pair group flag,

11. upper first mark, 12, upper second mark, 13, upper third mark,

14. the upper fourth mark, 15, the upper fifth mark, 16, the upper sixth mark,

21. the lower first mark, 22, the lower second mark, 23, the lower third mark,

24. lower fourth mark, 25, lower fifth mark, 26, lower sixth mark

31. The lower first label, 32, the lower second label, 33, the lower third label,

34. the fourth label, 35, the fifth label, 36, and the sixth label.

Detailed Description

The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. Directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], [ lateral ] and the like, refer to the directions of the attached drawings only. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having the same or similar structure are denoted by the same reference numerals.

One embodiment of the invention provides a liquid crystal display panel, which comprises a TFT substrate and a CF substrate, wherein a first group pair mark is arranged on the TFT substrate, and a second group pair mark is correspondingly arranged on the CF substrate.

Referring to fig. 3, the first group pair mark 1 on the TFT substrate includes an upper first mark 11, an upper second mark 12, an upper third mark 13, an upper fourth mark 14, an upper fifth mark 15, and an upper sixth mark 16, and the shapes of the upper marks are preferably rectangles with identical shapes and are arranged at equal intervals. Furthermore, the upper marks are preferably made of metal materials, so that perspective rays can be effectively shielded.

Further, in various embodiments, the number of the above identifiers included in the first group pair group identifier 1 may be 5, 6, 7, 8, and the like, and is not limited specifically.

Referring to fig. 4, the second group pair mark 2 on the CF substrate includes a lower first mark 21, a lower second mark 22, a lower third mark 23, a lower fourth mark 24, a lower fifth mark 25, and a lower sixth mark 26.

Wherein, a lower first mark 31 is further arranged below the lower first mark 21, the lower first mark 31 comprises two marks which are respectively arranged at two sides below the lower first mark 21 and aligned inwards. The lower second mark 32 is also correspondingly arranged under the lower second mark 22, the arrangement mode of the lower second mark is consistent with that of the lower first mark 31, and similarly, a lower third mark 33, a lower fourth mark 34, a lower fifth mark 34 and a lower sixth mark 36 are correspondingly arranged under the lower third mark 23, the lower fourth mark 24, the lower fifth mark 25 and the lower sixth mark 26 respectively.

In order to ensure that the upper first mark 11 and the upper and lower first marks 21 can be completely overlapped, the lower first mark 21 and the upper first mark 11 have the same shape and are rectangular, and the width of the lower first mark 21 is equal to that of the upper first mark 11. Similarly, the lower second mark 22, the lower third mark 23, the lower fourth mark 24, the lower fifth mark 25, the lower sixth mark 26, and the like are provided in the same manner as the lower first mark 21. Therefore, the lower second marks 22, the lower third marks 23, the lower fourth marks 24, the lower fifth marks 25 and the lower sixth marks 26 of the second group pair mark 2 are also arranged at equal intervals.

The lower marks included in the second group pair group flag 2 are disposed opposite to the upper marks included in the first group pair group flag 1, and thus the lower marks included in the second group pair group flag 2 are the same in number as the upper marks included in the first group pair group flag 1.

The subscript includes one of a number and a letter. Specifically, if a numerical method is used, the lower first label 31 and the lower second label 32 … … can be sequentially identified in the order of numbers, for example, 1, 2, 3, and 4 … …, wherein the numbers can be roman numbers and arabic numbers, and the method is not limited to the specific ones as needed. If the letters are used, the lower first label 31 and the lower second label 32 … … can be sequentially marked in the order of english letters, such as a, b, c, d … …, wherein the letters can be upper case or lower case, and can be specific and optional, and are not limited.

Wherein, if the lower label adopts a digital form, the width of each digit is 1 um. The arrangement can avoid the situation that the numbers between the lower labels are too dense to cause overlapping and difficult distinguishing, and meanwhile, the length of the lower labels is not limited.

Further, the distance between the upper marks of the first group pair marks is 1-3 um larger than the distance between the corresponding lower marks. Specifically, the distance between the upper first mark 11 and the upper second mark 12 is 1-3 um larger than the distance between the lower first mark 21 and the lower second mark 22, the distance between the upper second mark 12 and the upper third mark 13 is 1-3 um larger than the distance between the lower second mark 22 and the lower third mark 23, and the distance between the subsequent upper marks is also so larger than the distance between the corresponding lower marks.

Referring to fig. 5, when the TFT substrate and the CF substrate are paired, it is known that the length of the upper first mark 11 is equal to or greater than the sum of the lengths of the lower first mark 21 and the lower first mark 31, so that the first group pair mark 1 and the second group pair mark 2 are correspondingly covered, if the TFT substrate and the CF substrate are aligned, the lower first mark 21 and the lower first mark 31 on the CF substrate are covered by the upper metal first mark 11 on the TFT substrate, and the upper second mark 12, the lower second mark 22 and the lower second mark 32 are exposed and leak light; however, if there is a deviation, light leakage occurs at the corresponding upper first mark 11, lower first mark 21 and lower first mark 31, corresponding coverage occurs at other positions corresponding to the deviation, and the number of the mark with all the light transmission covered is the pair accuracy of the TFT substrate and the CF substrate, and the pair accuracy can be read only by transmitting light without identifying under a high power microscope.

More specifically, as shown in the figure, the distance between the upper first mark 11 and the upper second mark 12 of the first group pair group mark 1 is 1um greater than the distance between the lower first mark 21 and the lower second mark 22 of the second group pair group mark 2, after the TFT substrate and the CF substrate are paired, the upper fourth mark 14, the lower fourth mark 24 and the lower fourth mark 34 are overlapped correspondingly, and the accuracy of the pair group of the TFT substrate and the CF substrate corresponding to the panel is 4 um.

In the manufacturing process of the embodiment of the invention, the second group pair mark 2 on the CF substrate needs to be exposed after being blackened. Two of these labels are used as examples for explanation.

The positions of the upper first mark 11 and the upper second mark 12 of each rectangle of the first group pair group mark 1 are provided with BM light resistances, the position of the second group pair group mark 2 corresponding to the first group pair group mark 1 is a whole block of BM light resistance, the upper first mark 21 and the lower first mark 21 of the CF substrate opposite to the positions of the upper first mark 11 and the upper second mark 12 are provided with no BM light resistance, the lower second mark 22 is provided with no BM light resistance, the lower first mark 21 and the lower second mark 22 are provided with corresponding digital no BM light resistance synchronously, each lower first mark 21 and each lower second mark 22 correspond to two lower first marks 31 and lower second marks 32, the size of the corresponding number is 1um in width and unlimited in length, and the left lower first mark 31 and the right lower second mark 32 are respectively aligned below the positions of the lower first mark 21 and the lower second mark 22. So that the exposed upper first mark 11 and the exposed upper second mark 12 are made of light-shielding metal, and the opposite lower first mark 21, the lower second mark 22, the lower first mark 31 and the lower second mark 32 are made of light-transmitting areas.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A liquid crystal display panel includes a TFT substrate and a CF substrate, characterized in that:

a first group of pair group marks are arranged on the TFT substrate and comprise a plurality of upper marks, and the upper marks comprise upper first marks and upper second marks; the first group pair mark is made of a metal material and used for shielding perspective light;

a second group of group marks are arranged on the CF substrate, the second group of group marks comprise a plurality of lower marks and lower labels which are arranged corresponding to the upper marks, the lower marks comprise lower first marks and lower second marks, the lower labels comprise lower first marks and lower second marks, the lower first marks are correspondingly arranged under the lower first marks, the side edges of the first marks are flush with the side edges of the lower first marks, the lower second marks are correspondingly arranged under the lower second marks, and the side edges of the lower second marks are flush with the side edges of the lower second marks; the second group set mark is a light-transmitting area formed by carrying out exposure after carrying out blackening treatment on the CF substrate;

only one upper mark in the upper marks completely covers a corresponding lower mark in the lower marks and a corresponding lower mark in the lower marks, the rest lower marks in the lower marks are exposed outside the corresponding upper marks, and the number of the lower marks with the light-transmitting areas completely covered is the pair accuracy of the TFT substrate and the CF substrate; when the TFT substrate and the CF substrate are combined into a group, the upper first mark covers the lower first mark and the lower first label, and the upper second mark covers the lower second mark and the lower second label; wherein the lower first identifier and the lower first label are completely covered by the upper first identifier, or the lower second identifier and the lower second label are completely covered by the upper second identifier; and the other one of the lower first label or the lower second label is exposed by the corresponding upper first identifier or the upper second identifier.

2. The liquid crystal display panel according to claim 1, wherein the upper mark comprises an upper third mark and an upper fourth mark; the lower marks comprise a lower third mark and a lower fourth mark which correspond to the upper third mark and the upper fourth mark; the lower labels comprise lower third labels and lower fourth labels corresponding to the upper third labels and the upper fourth labels.

3. The LCD panel of claim 2, wherein the upper first mark and the upper second mark are equally spaced, and the lower first mark and the lower second mark are equally spaced, wherein the upper first mark and the upper second mark are spaced apart from each other more than the lower first mark and the lower second mark.

4. The liquid crystal display panel according to claim 1, wherein the length of the upper first mark is equal to or greater than the sum of the lengths of the lower first mark and the lower first mark.

5. The liquid crystal display panel of claim 1, wherein the width of the upper first indicator is equal to the width of the lower first indicator.

6. The liquid crystal display panel according to claim 1, wherein the distance between the upper first mark and the upper second mark is 10-20 um; the interval between first sign and the second sign down is 10~20um down.

7. The liquid crystal display panel according to claim 1, wherein the distance between the upper first mark and the upper second mark is 1-3 um larger than the distance between the lower first mark and the lower second mark.

8. The liquid crystal display panel according to claim 2, wherein the distance between the upper second mark and the upper third mark is 1-3 um larger than the distance between the lower second mark and the lower third mark.

9. The LCD panel of claim 1, wherein the lower first label and the lower second label are numerical labels, and wherein each numerical label has a width of 1 um.