CN109192116B - Quality inspection method of liquid crystal panel - Google Patents
Quality inspection method of liquid crystal panel Download PDFInfo
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- CN109192116B CN109192116B CN201811097072.7A CN201811097072A CN109192116B CN 109192116 B CN109192116 B CN 109192116B CN 201811097072 A CN201811097072 A CN 201811097072A CN 109192116 B CN109192116 B CN 109192116B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000007689 inspection Methods 0.000 title claims abstract description 18
- 239000000758 substrate Substances 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 40
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 20
- 239000011780 sodium chloride Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 20
- 238000010586 diagram Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910000365 copper sulfate Inorganic materials 0.000 description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 2
- -1 cu (oh)2 Chemical compound 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a quality inspection method of a liquid crystal panel. The invention solves the problems that the greening phenomenon in the prior art is long in recurrence time, short in phenomenon and difficult to observe, can rapidly recur the greening phenomenon, verifies the integral antistatic property of the panel, improves the quality inspection efficiency of the liquid crystal panel, saves the cost and accelerates the production.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a quality inspection method of a liquid crystal panel.
Background
In recent years, with the development of Display technology, Liquid Crystal displays (LC D) have rapidly become popular because of their unique advantages of high image quality, low power consumption, and thin and light body. Among them, Thin Film Transistor-Liquid Crystal displays (TFT-LCDs) are currently the most common mainstream Liquid Crystal displays, and are widely used in electronic devices such as mobile phones and handheld computers.
The liquid crystal panel is mainly formed by combining an array substrate and a color film substrate, a supporting column is used as a spacer to support the box thickness, frame glue is used as a sealing material and a bonding agent to combine the color film substrate with the array substrate, and in the production process, the liquid crystal panel has multiple and complicated process steps, static is easy to accumulate, and the problems of electrostatic damage, electrostatic image smudging, greenness (Greenish) and the like are easy to generate. The phenomena of electrostatic shock and electrostatic image smudging are easy to capture and solve, but the problem of greening is difficult to find, long-time cold and hot shock or 240 hours under a high-temperature and high-humidity environment are needed, and the greening phenomenon is short and difficult to observe. There is therefore a need for a method that can rapidly reproduce the greening phenomenon.
Disclosure of Invention
In order to solve the problems, the invention provides a quality inspection method of a liquid crystal panel, which is characterized in that a liquid crystal panel is placed in a conductive liquid, and a certain potential difference is added, so that charged ions are gathered towards two sides of a color film substrate and an array substrate in the liquid crystal panel, and the greening phenomenon caused by static accumulation is rapidly reproduced.
The specific scheme of the invention is as follows: a quality inspection method of a liquid crystal panel comprises a color film substrate and an array substrate which are arranged oppositely, and comprises the following steps:
the first step is as follows: pouring a certain amount of conductive liquid into a container;
the second step is that: immersing a liquid crystal panel part into conductive liquid, wherein a grounding point of the liquid crystal panel is arranged outside the conductive liquid;
the third step: one pole of a power supply is connected with the conductive liquid, and the other pole of the power supply is connected with the grounding point of the liquid crystal panel which is not immersed in the conductive liquid;
the fourth step: electrifying to enable the color film substrate and the array substrate to have potential difference, and controlling electrifying time;
the fifth step: and taking out the liquid crystal panel, and observing the liquid crystal panel to finish quality inspection.
Further, in the fourth step of the step, the electrifying time is 5-30 minutes.
Further, in the first step, the conductive liquid is an ionic conductive liquid.
Further, the conductive liquid is a sodium chloride solution.
Further, the concentration of the sodium chloride solution is 2% -26%.
Further, in the third step, the power supply is a dc power supply.
Furthermore, the liquid crystal panel is a liquid crystal display screen, a flexible circuit board of the liquid crystal display screen is arranged outside the conductive liquid, and one pole of the power supply is connected to a grounding point of the flexible circuit board.
Further, the potential difference between the color film substrate and the array substrate is 2-35V;
furthermore, in the fourth step, the size of the electrified current is 0.5mA-25 mA.
Compared with the prior art, the liquid crystal display panel is placed in the conductive liquid, the array substrate and the color film substrate of the liquid crystal display panel generate potential difference when the liquid crystal display panel is electrified, and charged ions are gathered to two sides of the array substrate and the color film substrate through the potential difference, so that the green phenomenon is rapidly reproduced. The invention solves the problems that the greening phenomenon in the prior art is long in recurrence time, short in phenomenon and difficult to observe, can rapidly recur the greening phenomenon, verifies the integral antistatic property of the panel, improves the quality inspection efficiency of the liquid crystal panel, saves the cost and accelerates the production.
Drawings
FIG. 1 is a schematic diagram of a quality inspection method for a liquid crystal panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a method for inspecting a liquid crystal display panel according to an embodiment of the invention;
FIG. 3 is a schematic diagram of the principles of the present invention;
FIG. 4 is a diagram illustrating a state of the liquid crystal panel after quality inspection is completed.
List of reference numerals: 1-container, 2-conductive liquid, 3-liquid crystal panel, 4-power supply, 5-grounding point, 6-liquid crystal display screen, 7-flexible circuit board, 8-flexible circuit board grounding point, 9-color film substrate, 10-array substrate and 11-greening badness.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The first embodiment is as follows:
fig. 1 is a schematic diagram of a quality inspection method for a liquid crystal panel according to an embodiment of the present invention, fig. 3 is a schematic diagram of a principle of the present invention, and fig. 4 is a schematic diagram of a state of the liquid crystal panel after quality inspection is completed, as shown in fig. 1, 3, and 4, a quality inspection method for a liquid crystal panel includes a color film substrate and an array substrate which are oppositely disposed, and the method includes the following steps:
the first step is as follows: pouring a certain amount of conductive liquid 2 into the container 1;
the conductive liquid 2 is an ionic conductive liquid, specifically, salts such as sodium chloride and copper sulfate, acid and alkali that do not react with the material in the panel, such as NaOH, cu (oh)2, and HCl, in this embodiment, sodium chloride is used as the conductive liquid 2, and the concentration of the sodium chloride solution is between 2% and 26%, as long as the conductive liquid 2 can form circuit conduction.
The second step is that: the liquid crystal panel 3 is partially immersed in the conductive liquid 2, and a grounding point 5 of the liquid crystal panel 3 is arranged outside the conductive liquid 2;
the third step: one pole of the power supply 4 is connected with the conductive liquid 2, and the other pole is connected with the grounding point 5 of the liquid crystal panel 3 which is not immersed in the conductive liquid 2;
the power supply 4 is a dc power supply.
The fourth step: electrifying to enable a potential difference to exist between the color film substrate 9 and the array substrate 10 of the liquid crystal panel 3, and controlling the electrifying time;
the size of the electrified current is 0.5mA-25mA, the size of the current is a comprehensive reaction of different voltages, different sizes and different solubilities, and the current range is finally confirmed to be 0.5mA-25mA according to the half gray scale voltage of the liquid crystal panel and the large, medium and small size panels of human body safety voltage experiments.
The potential difference between the color film substrate 9 and the array substrate 10 is 2-35V, wherein 2V can be driven by considering the half gray scale state liquid crystal of the common liquid crystal driving voltage, and 35V is lower than 36V which is safe for human body, so that the safety is ensured.
Further, Q is IT, C is Q/U, and I is U/R, and the larger the voltage, the larger the current in the solution, the faster the ions accumulated at both ends of the panel, and the shorter the recurrence time, and the power-on time is 5 to 30 minutes in consideration of the panel size and the maximum voltage.
Further, for a large-size liquid crystal panel 3, the general energization time is 20 to 30 minutes, the energization current is 10 to 25mA, the potential difference between the color film substrate 9 and the array substrate 10 is 25V to 35V, for a medium-size liquid crystal panel 3, the general energization time is 15 to 25 minutes, the energization current is 5 to 15mA, the potential difference between the color film substrate 9 and the array substrate 10 is 10 to 25V, for a small-size liquid crystal panel 3, the general energization time is 5 to 20 minutes, the energization current is 0.5 to 10mA, and the potential difference between the color film substrate 9 and the array substrate 10 is 2 to 15V.
Table 1 shows the values of the lower limit voltage and current for liquid crystal panels of different sizes in the embodiment of the present invention:
| size of liquid crystal panel | Voltage (V) | Current (mA) | Oftentimes (min) |
| Large scale | 25 | 10 | 30 |
| |
10 | 5 | 25 |
| Small-sized | 2 | 0.5 | 20 |
Table 2 shows the voltage and current values of the liquid crystal panels of different sizes according to the embodiment of the present invention:
| size of liquid crystal panel | Voltage (V) | Current (mA) | Oftentimes (min) |
| Large scale | 35 | 25 | 20 |
| Medium size | 25 | 15 | 15 |
| Small-sized | 15 | 10 | 5 |
Table 3 shows the general voltage and current values of liquid crystal panels with different sizes according to an embodiment of the present invention:
| size of liquid crystal panel | Voltage (V) | Current (mA) | Oftentimes (min) |
| Large scale | 30 | 15 | 25 |
| Medium size | 20 | 10 | 20 |
| Small-sized | 10 | 5 | 10 |
The fifth step: taking out the liquid crystal panel 3, observing the liquid crystal panel 3, forming a green defect 11 at the edge of the liquid crystal panel 3 through the place soaked by the conductive liquid 2, as shown in fig. 4, and completing the quality inspection.
Example two:
as shown in fig. 2, the method for testing the quality of the lcd panel according to the present invention is not only suitable for testing the quality of the lcd panel, but also suitable for testing the quality of the lcd panel.
The first step is as follows: pouring a certain amount of conductive liquid 2 into the container 1;
the conductive liquid 2 is an ionic conductive liquid, specifically, salts such as sodium chloride and copper sulfate, acid and alkali that do not react with the material in the panel, such as NaOH, cu (oh)2, and HCl, in this embodiment, sodium chloride is used as the conductive liquid 2, and the concentration of the sodium chloride solution is between 2% and 26%, as long as the conductive liquid 2 can form circuit conduction.
The second step is that: the liquid crystal display screen 6 is partially immersed in the conductive liquid 2, so that the flexible circuit board 7 is arranged outside the conductive liquid 2;
the third step: one pole of the power supply 4 is connected with the conductive liquid 2, and the other pole is connected with the grounding point 8 of the flexible circuit board;
the power supply 4 is a dc power supply.
The fourth step: electrifying to enable a color film substrate 9 and an array substrate 10 of a liquid crystal panel 3 of the liquid crystal display screen 6 to have potential difference, and controlling electrifying time;
the size of the electrified current is 0.5mA-25mA, the size of the current is a comprehensive reaction of different voltages, different sizes and different solubilities, and the current range is finally confirmed to be 0.5mA-25mA according to the half gray scale voltage of the liquid crystal panel and the large, medium and small size panels of human body safety voltage experiments.
The potential difference between the color film substrate 9 and the array substrate 10 is 2-35V, wherein 2V can be driven by considering the half gray scale state liquid crystal of the common liquid crystal driving voltage, and 35V is lower than 36V which is safe for human body, so that the safety is ensured.
Further, Q is IT, C is Q/U, and I is U/R, and the larger the voltage, the larger the current in the solution, the faster the ions accumulated at both ends of the panel, and the shorter the recurrence time, and the power-on time is 5 to 30 minutes in consideration of the panel size and the maximum voltage.
Further, for a large-size liquid crystal display screen 6, the general energization time is 20 to 30 minutes, the energization current is 10 to 25mA, the potential difference between the color film substrate 9 and the array substrate 10 is 25V to 35V, for a medium-size liquid crystal display screen 6, the general energization time is 15 to 25 minutes, the energization current is 5 to 15mA, the potential difference between the color film substrate 9 and the array substrate 10 is 10 to 25V, for a small-size liquid crystal display screen 6, the general energization time is 5 to 20 minutes, the energization current is 0.5 to 10mA, and the potential difference between the color film substrate 9 and the array substrate 10 is 2 to 15V.
Table 4 shows the results of the voltage and current values for the lower limits of the liquid crystal displays of different sizes in the second embodiment of the present invention:
| size of liquid crystal display screen | Voltage (V) | Current (mA) | Oftentimes (min) |
| Large scale | 25 | 10 | 30 |
| |
10 | 5 | 25 |
| Small-sized | 2 | 0.5 | 20 |
Table 5 shows the voltage and current values of the upper limit of the lcd panels of different sizes in the second embodiment of the present invention:
| liquid crystal display screenSize of | Voltage (V) | Current (mA) | Oftentimes (min) |
| Large scale | 35 | 25 | 20 |
| Medium size | 25 | 15 | 15 |
| Small-sized | 15 | 10 | 5 |
Table 6 shows the general voltage and current values of the lcd panels of different sizes in the second embodiment of the present invention:
| size of liquid crystal display screen | Voltage (V) | Current (mA) | Oftentimes (min) |
| Large scale | 30 | 15 | 25 |
| Medium size | 20 | 10 | 20 |
| Small-sized | 10 | 5 | 10 |
The fifth step: and (3) taking the liquid crystal display screen 6, observing the liquid crystal display screen 6, and forming a green defect 11 at the edge of the liquid crystal display screen 6 through the place soaked by the conductive liquid 2, as shown in figure 4, thereby completing quality inspection.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the foregoing embodiments, and various equivalent changes (such as number, shape, position, etc.) may be made to the technical solution of the present invention within the technical spirit of the present invention, and these equivalent changes are all within the protection scope of the present invention.
Claims (9)
1. A quality inspection method of a liquid crystal panel comprises a color film substrate and an array substrate which are arranged oppositely, and is characterized by comprising the following steps:
the first step is as follows: pouring a certain amount of conductive liquid into a container;
the second step is that: immersing a liquid crystal panel part into conductive liquid, wherein a grounding point of the liquid crystal panel is arranged outside the conductive liquid;
the third step: one pole of a power supply is connected with the conductive liquid, and the other pole of the power supply is connected with the grounding point of the liquid crystal panel which is not immersed in the conductive liquid;
the fourth step: electrifying to enable the color film substrate and the array substrate to have potential difference, and controlling electrifying time;
the fifth step: and taking out the liquid crystal panel, and observing the liquid crystal panel to finish quality inspection.
2. The method for inspecting the quality of a liquid crystal panel according to claim 1, wherein: in the fourth step of the step, the electrifying time is 5-30 minutes.
3. The method for inspecting the quality of a liquid crystal panel according to claim 1, wherein: in the first step of the step, the conductive liquid is an ionic conductive liquid.
4. The method for inspecting the quality of a liquid crystal panel according to claim 1, wherein: the conductive liquid is sodium chloride solution.
5. The method for inspecting the quality of a liquid crystal panel according to claim 4, wherein: the concentration of the sodium chloride solution is 2% -26%.
6. The method for inspecting the quality of a liquid crystal panel according to claim 1, wherein: in the third step, the power supply is a direct current power supply.
7. The method for inspecting the quality of a liquid crystal panel according to claim 1, wherein: the liquid crystal display panel is a liquid crystal display screen, a flexible circuit board of the liquid crystal display screen is arranged outside the conductive liquid, and one pole of the power supply is connected to the grounding point of the flexible circuit board.
8. The method for inspecting the quality of a liquid crystal panel according to claim 1, wherein: and the potential difference between the color film substrate and the array substrate is 2-35V.
9. The method for inspecting the quality of a liquid crystal panel according to claim 1, wherein: in the fourth step, the electrified current is 0.5mA-25 mA.
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| CN107783337A (en) * | 2017-09-07 | 2018-03-09 | 昆山龙腾光电有限公司 | Transflective display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142591B (en) * | 2014-07-11 | 2017-07-18 | 合肥鑫晟光电科技有限公司 | A kind of array base palte and preparation method, a kind of display device |
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- 2018-09-20 CN CN201811097072.7A patent/CN109192116B/en active Active
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|---|---|---|---|---|
| KR100577801B1 (en) * | 2004-11-12 | 2006-05-11 | 비오이 하이디스 테크놀로지 주식회사 | Common Voltage Distortion Compensation Method of LCD |
| CN102645769A (en) * | 2011-02-16 | 2012-08-22 | 奇菱科技股份有限公司 | display device |
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