CN111722422B - Liquid crystal panel detection method and liquid crystal panel - Google Patents
Liquid crystal panel detection method and liquid crystal panel Download PDFInfo
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- CN111722422B CN111722422B CN202010525557.2A CN202010525557A CN111722422B CN 111722422 B CN111722422 B CN 111722422B CN 202010525557 A CN202010525557 A CN 202010525557A CN 111722422 B CN111722422 B CN 111722422B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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Abstract
The detection method of the liquid crystal panel provided by the embodiment of the application comprises the following steps: comparing the chromaticity of the liquid crystal panel to be detected with the chromaticity of the control liquid crystal panel to obtain a first comparison result, comparing the chromaticity of the liquid crystal panel to be detected after the upper polaroid is removed with the chromaticity of the control liquid crystal panel after the upper polaroid is removed to obtain a second comparison result, comparing the chromaticity of the liquid crystal panel to be detected after the upper polaroid and the lower polaroid are removed with the chromaticity of the control liquid crystal panel after the upper polaroid is removed to obtain a third comparison result, comparing the chromaticity of the liquid crystal panel to be detected after the lower polaroid is removed with the chromaticity of the control liquid crystal panel after the lower polaroid is removed to obtain a fourth comparison result, and determining a detection result according to the first comparison result, the second comparison result, the third comparison result and the fourth comparison result. The method can quickly clear the reasons for influencing the abnormal chromaticity of the liquid crystal panel.
Description
Technical Field
The application relates to the technical field of display, in particular to a detection method of a liquid crystal display panel and the liquid crystal display panel.
Background
The chromaticity of the liquid crystal television influences subjective feelings of audiences, and is a first always perceived parameter of consumers. The liquid crystal panel and the BLU are combined for display together, and the chromaticity of different liquid crystal panels can be different, so that the chromaticity specification of the liquid crystal panel is important, and is an important parameter written in the product specification. Optical metrology is often required for monitoring. The liquid crystal panel has a plurality of layers of materials, which are complex systems, and each layer of material can influence the chromaticity of the liquid crystal panel. And the effect of different materials is different.
When the chromaticity of the liquid crystal panel is abnormal, how to quickly clear the influencing factors becomes a technical problem to be solved by the technicians in the field.
Disclosure of Invention
The embodiment of the application provides a detection method of a liquid crystal panel and the liquid crystal panel, which can quickly clear the reason that the chromaticity of the liquid crystal panel is affected to be abnormal.
The application provides a detection method of liquid crystal display panel, liquid crystal display panel includes last polaroid, liquid crystal box and lower polaroid, go up the polaroid setting and be in the upper surface of liquid crystal box, lower polaroid setting is in the lower surface of liquid crystal box, include the step:
obtaining chromaticity and light transmittance of a liquid crystal panel to be detected, and comparing the chromaticity of the liquid crystal panel to be detected with that of a control liquid crystal panel to obtain a first comparison result;
obtaining chromaticity and light transmittance of the liquid crystal panel to be tested after the upper polaroid is removed, and comparing the chromaticity of the liquid crystal panel to be tested after the upper polaroid is removed with the chromaticity of the liquid crystal panel to be compared after the upper polaroid is removed, so as to obtain a second comparison result;
obtaining chromaticity and light transmittance of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed, and comparing the chromaticity of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed with the chromaticity of the liquid crystal panel to be compared after the upper polaroid and the lower polaroid are removed, so as to obtain a third comparison result;
obtaining chromaticity and light transmittance of the liquid crystal panel to be tested after the lower polaroid is removed, and comparing the chromaticity of the liquid crystal panel to be tested after the lower polaroid is removed with the chromaticity of the liquid crystal panel to be compared after the lower polaroid is removed, so as to obtain a fourth comparison result;
and determining a detection result according to the first comparison result, the second comparison result, the third comparison result and the fourth comparison result.
In some embodiments, the obtaining chromaticity and transmittance of the liquid crystal panel to be measured includes:
acquiring chromaticity and brightness of a liquid crystal panel to be tested in a white picture;
acquiring the brightness of the liquid crystal panel to be tested in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested based on the brightness of the liquid crystal panel to be tested on the white picture and the brightness of the backlight source.
In some embodiments, the obtaining the chromaticity and the transmittance of the liquid crystal panel to be measured after removing the upper polarizer includes:
obtaining chromaticity and brightness of the liquid crystal panel to be tested after the upper polaroid is removed;
acquiring the brightness of the liquid crystal panel to be tested in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested after the upper polaroid is removed based on the brightness of the liquid crystal panel to be tested after the upper polaroid is removed and the brightness of the backlight source.
In some embodiments, the obtaining the chromaticity and the brightness of the liquid crystal panel to be measured after removing the upper polarizer includes:
stripping the upper polaroid from the liquid crystal panel to be tested;
and measuring the liquid crystal panel to be detected after the upper polaroid is stripped, so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the upper polaroid is removed.
In some embodiments, the obtaining the chromaticity and the transmittance of the liquid crystal panel to be measured after removing the upper polarizer and the lower polarizer includes:
obtaining chromaticity and brightness of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed;
acquiring the brightness of the liquid crystal panel to be tested in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed based on the brightness of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed and the brightness of the backlight source.
In some embodiments, the obtaining the chromaticity and the brightness of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed includes:
stripping the upper polaroid and the lower polaroid from the liquid crystal panel to be tested;
and measuring the liquid crystal panel to be detected after the upper polaroid and the lower polaroid are stripped, so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the upper polaroid and the lower polaroid are removed.
In some embodiments, the obtaining the chromaticity and the transmittance of the liquid crystal panel to be measured after removing the lower polarizer includes:
obtaining chromaticity and brightness of the liquid crystal panel to be tested after the lower polaroid is removed;
acquiring the brightness of the liquid crystal panel to be tested in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested after the lower polaroid is removed based on the brightness of the liquid crystal panel to be tested after the lower polaroid is removed and the brightness of the backlight source.
In some embodiments, the obtaining the chromaticity and the brightness of the liquid crystal panel to be measured after removing the lower polarizer includes:
peeling the lower polaroid from the liquid crystal panel to be tested;
and measuring the liquid crystal panel to be detected after the lower polaroid is stripped, so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the lower polaroid is removed.
In some embodiments, the determining the detection result according to the first comparison result, the second comparison result, the third comparison result, and the fourth comparison result includes:
if the first comparison result is larger than a preset threshold value; and comparing the second comparison result, the third comparison result and the fourth comparison result, and determining the checking result with the largest influence factor of the numerical value in the second comparison result, the third comparison result and the fourth comparison result.
The embodiment of the application also provides a liquid crystal panel, and the liquid crystal panel manufactured by the detection method of the liquid crystal panel is used.
The detection method of the liquid crystal panel and the liquid crystal panel provided by the embodiment of the application comprise the following steps: obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested, comparing the chromaticity of the liquid crystal panel to be tested with the chromaticity of the control liquid crystal panel to obtain a first comparison result, obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after removing the upper polaroid, comparing the chromaticity of the liquid crystal panel to be tested after removing the upper polaroid with the chromaticity of the control liquid crystal panel after removing the upper polaroid and the lower polaroid to obtain a second comparison result, obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after removing the upper polaroid and the lower polaroid, comparing the chromaticity of the liquid crystal panel to be tested after removing the lower polaroid with the chromaticity of the control liquid crystal panel after removing the lower polaroid to obtain a fourth comparison result, and determining a detection result according to the first comparison result, the second comparison result, the third comparison result and the fourth comparison result. According to the method, the liquid crystal panel to be detected and the control liquid crystal panel are subjected to chromaticity comparison under the condition that materials of all layers are removed respectively, so that comparison results under different conditions are obtained, then the greatest influence of the comparison results under which conditions is determined according to the comparison results, the detection result is determined, and therefore the reasons for influencing the chromaticity of the liquid crystal panel to be abnormal can be rapidly cleared.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a detection method of a liquid crystal panel according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a liquid crystal panel to be tested according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of the liquid crystal panel to be tested according to the embodiment of the present application after removing the upper polarizer.
Fig. 4 is a schematic structural diagram of the liquid crystal panel to be tested according to the embodiment of the present application after the upper polarizer and the lower polarizer are removed.
Fig. 5 is a schematic structural diagram of the liquid crystal panel to be tested according to the embodiment of the present application after removing the lower polarizer.
Fig. 6 is a schematic structural diagram of a liquid crystal panel according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The embodiment of the application provides a detection method of a liquid crystal panel and the liquid crystal display panel, and the detection method of the liquid crystal panel is described in detail below.
Referring to fig. 1, fig. 1 is a flow chart of a detection method of a liquid crystal panel according to an embodiment of the present application. The embodiment of the application provides a detection method of a liquid crystal display panel, wherein the liquid crystal display panel comprises an upper polaroid, a liquid crystal box and a lower polaroid, the upper polaroid is arranged on the upper surface of the liquid crystal box, the lower polaroid is arranged on the lower surface of the liquid crystal box, and the detection method comprises the following steps:
101. and acquiring the chromaticity and the light transmittance of the liquid crystal panel to be detected, and comparing the chromaticity of the liquid crystal panel to be detected with the chromaticity of the control liquid crystal panel to obtain a first comparison result.
The chromaticity of the liquid crystal panel to be measured and the chromaticity of the control liquid crystal panel are measured separately. The method for measuring the chromaticity of the liquid crystal panel to be measured and the control liquid crystal panel can be measured by a chromaticity measuring device. Specific measurement methods for measuring chromaticity of the liquid crystal panel to be measured and the control liquid crystal panel are not described in detail in the embodiments of the present application. In addition, the chromaticity of the liquid crystal panel to be detected and the chromaticity of the control liquid crystal panel are subtracted to obtain a first comparison result. The control liquid crystal panel is a liquid crystal panel with normal chromaticity, and if the value of the first comparison result exceeds a preset threshold value, the abnormal chromaticity of the liquid crystal panel to be detected is indicated. It is understood that the preset threshold may be determined according to need, for example, the preset threshold is 0.001. For another example, the chromaticity of the liquid crystal panel to be measured is x=0.279, y=0.303, the chromaticity of the control liquid crystal panel is x1=0.273, y1=0.311, then the chromaticity difference between the liquid crystal panel to be measured and the control liquid crystal panel is x-x1=0.006, y-y1= -0.009, then the total difference value of the chromaticity is greater than the preset threshold value, and then it is determined that the chromaticity of the liquid crystal panel to be measured is abnormal.
The light transmittance of the liquid crystal panel to be measured can be measured in a mode of measuring the brightness of the backlight source of the liquid crystal panel to be measured and the brightness after the backlight source passes through the liquid crystal panel to be measured. Thereby obtaining the light transmittance of the liquid crystal panel to be measured. The control liquid crystal panel can also be measured by the same method as the liquid crystal panel to be measured, and of course, other manners can also be used for measuring, which is not repeated in the embodiment of the present application.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a liquid crystal panel to be tested according to an embodiment of the present application. The liquid crystal panel to be measured as shown in fig. 2 may be measured to determine whether chromaticity of the liquid crystal panel to be measured is abnormal. The liquid crystal panel to be tested comprises an upper polarizer 10, a liquid crystal box 20 and a lower polarizer 30.
In some embodiments, the obtaining the chromaticity and the transmittance of the liquid crystal panel to be measured specifically includes the steps of:
(1) And acquiring the chromaticity and the brightness of the liquid crystal panel to be tested in the white picture.
(2) And acquiring the brightness of the liquid crystal panel to be tested in the backlight source.
(3) And obtaining the light transmittance of the liquid crystal panel to be tested based on the brightness of the liquid crystal panel to be tested on the white picture and the brightness of the backlight source.
It should be noted that the transmittance of the liquid crystal panel to be measured is equal to the brightness of the liquid crystal panel to be measured in the white screen divided by the brightness of the backlight source. The specific formula is as follows: t=l1/l=η Natural light of lower polaroid *AR*η cf *η LC *η And polarizing light by the upper polarizer. Specifically, T represents the light transmittance of the liquid crystal panel to be measured, L1 represents the brightness of the white screen of the liquid crystal panel to be measured, and η is the brightness of the liquid crystal panel to be measured Natural light of lower polaroid The transmission spectrum of the lower polaroid on incident natural light is represented, AR represents the transmission spectrum of the aperture ratio of the liquid crystal panel to be tested, eta cf Represents the transmission spectrum, eta, of each film layer in the liquid crystal box LC Indicating the transmission frequency spectrum of efficiency eta Upper polarizer polarized light Indicating the transmission spectrum of the upper polarizer for the incident polarized light.
From the above, the transmittance of the liquid crystal panel to be measured can be obtained by the brightness of the liquid crystal panel to be measured on the white screen and the brightness of the backlight source.
102. And obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the upper polaroid is removed, and comparing the chromaticity of the liquid crystal panel to be tested after the upper polaroid is removed with the chromaticity of the liquid crystal panel to be compared after the upper polaroid is removed, so as to obtain a second comparison result.
It should be noted that, the chromaticity of the liquid crystal panel to be measured after the upper polarizer is removed and the chromaticity of the control liquid crystal panel are measured respectively. The method for measuring the chromaticity of the liquid crystal panel to be measured and the control liquid crystal panel after the polarizer is removed can be measured by a chromaticity measuring device. And subtracting the chromaticity of the liquid crystal panel to be detected from the chromaticity of the control liquid crystal panel after the polarizer is removed, so as to obtain a second comparison result. For example, the chromaticity of the liquid crystal panel to be tested after the upper polarizer is removed is: x=0.282, y=0.300, and the chromaticity of the control liquid crystal panel after removing the upper polarizer is: x2=0.279 and y2=0.303, then the chromaticity difference between the liquid crystal panel to be measured and the control liquid crystal panel is: x-x2=0.002, y-y2= -0.002. Since the upper polarizer is removed, the influence of the lower polarizer on chromaticity can be judged. And determining that the influence of the lower polaroid on the abnormal chromaticity of the liquid crystal panel to be tested exists if the total difference value of the chromaticity of the liquid crystal panel to be tested and the control liquid crystal panel after the upper polaroid is removed is larger than a preset threshold value.
The method for removing the light transmittance of the upper polaroid of the liquid crystal panel to be tested can be used for measuring the brightness of the backlight source of the liquid crystal panel to be tested and the brightness of the liquid crystal panel to be tested after the upper polaroid is removed. And obtaining the light transmittance of the liquid crystal panel to be tested after the upper polaroid is removed. The light transmittance of the contrast liquid crystal panel after the upper polarizer is removed can also be measured by the same method as that of the liquid crystal panel to be measured, and of course, other manners can also be used for measuring, which is not repeated in the embodiment of the present application.
Referring to fig. 3, fig. 3 is a schematic structural diagram of the liquid crystal panel to be tested according to the embodiment of the present application after removing the upper polarizer. The liquid crystal panel to be measured as shown in fig. 3 may be measured to determine whether the chromaticity of the liquid crystal panel to be measured 100 is abnormal. The liquid crystal panel to be tested comprises an upper polarizer 10, a liquid crystal box 20 and a lower polarizer 30. Wherein the upper polarizer 10 is partially peeled off.
In some embodiments, the obtaining the chromaticity and the transmittance of the liquid crystal panel to be measured after removing the upper polarizer includes the steps of:
(1) And obtaining the chromaticity and the brightness of the liquid crystal panel to be tested after the upper polaroid is removed.
In some embodiments, the obtaining the chromaticity and the brightness of the liquid crystal panel to be measured after removing the upper polarizer includes:
(11) And stripping the upper polaroid from the liquid crystal panel to be tested.
(12) And measuring the liquid crystal panel to be detected after the upper polaroid is stripped, so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the upper polaroid is removed.
It should be noted that, the manner of removing the transmittance of the upper polarizer of the liquid crystal panel to be measured may measure the brightness of the backlight source of the liquid crystal panel to be measured and the brightness of the liquid crystal panel to be measured after removing the upper polarizer. And obtaining the light transmittance of the liquid crystal panel to be tested after the upper polaroid is removed.
(2) And acquiring the brightness of the liquid crystal panel to be tested in the backlight source.
(3) And obtaining the light transmittance of the liquid crystal panel to be tested after the upper polaroid is removed based on the brightness of the liquid crystal panel to be tested after the upper polaroid is removed and the brightness of the backlight source.
It should be noted that, the transmittance of the liquid crystal panel to be measured after the upper polarizer is removed is equal to the brightness of the white screen divided by the brightness of the backlight source after the upper polarizer is removed. The specific formula is as follows: t1=l2/l=η Natural light of lower polaroid *AR*η cf 。
It can be understood that T1 is the light transmittance of the liquid crystal panel to be measured after the upper polarizer is removed. L2 is the brightness of the liquid crystal panel to be tested on the white picture after the upper polaroid is removed. By the formula t1=l2/l=η Natural light of lower polaroid *AR*η cf The influence of the lower polaroid on the chromaticity abnormality of the liquid crystal panel to be tested can be verified.
103. And obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed, and comparing the chromaticity of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed with the chromaticity of the liquid crystal panel to be compared after the upper polaroid and the lower polaroid are removed, so as to obtain a third comparison result.
The chromaticity of the liquid crystal panel to be measured after the upper polarizer and the lower polarizer are removed and the chromaticity of the liquid crystal panel to be measured after the upper polarizer and the lower polarizer are removed are measured respectively. The method for measuring the chromaticity of the liquid crystal panel to be measured and the control liquid crystal panel after the upper polaroid and the lower polaroid are removed can be measured by a chromaticity measuring device. And subtracting the chromaticity of the liquid crystal panel to be detected from the chromaticity of the control liquid crystal panel after the upper polaroid and the lower polaroid are removed, so as to obtain a third comparison result. For example, the chromaticity of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed is as follows: x=0.275, y=0.291, and chromaticity after the upper and lower polarizers were removed in the control liquid crystal panel is: x3=0.274, y3=0.392, then the chromaticity difference between the liquid crystal panel to be measured and the control liquid crystal panel is x-x3=0.001, y-y3= -0.001. Since the upper and lower polarizers are removed, the influence of the liquid crystal cell on chromaticity can be judged. And if the total difference value of the chromaticity of the liquid crystal panel to be tested and the control liquid crystal panel after the upper polaroid and the lower polaroid are removed is not larger than a preset threshold value, determining that the influence of the liquid crystal box on the chromaticity abnormality is small.
The method for removing the light transmittance of the upper polaroid and the lower polaroid of the liquid crystal panel to be tested can be used for measuring the brightness of the backlight source of the liquid crystal panel to be tested and the brightness of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed. And the light transmittance of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed is obtained. The light transmittance of the contrast liquid crystal panel after the upper polarizer and the lower polarizer are removed can also be measured by the same method as that of the liquid crystal panel to be measured, and of course, other manners can also be used for measurement, which is not repeated in the embodiment of the present application.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the liquid crystal panel to be tested according to the embodiment of the present application after the upper polarizer and the lower polarizer are removed. The liquid crystal panel under test 100 as shown in fig. 4 may be measured to determine whether chromaticity of the liquid crystal panel under test is abnormal. The liquid crystal panel to be tested comprises an upper polarizer 10, a liquid crystal box 20 and a lower polarizer 30. Wherein, the upper polarizer 10 and the lower polarizer 30 are partially peeled off.
In some embodiments, the obtaining the chromaticity and the transmittance of the liquid crystal panel to be measured after the upper polarizer and the lower polarizer are removed includes the steps of:
(1) And obtaining the chromaticity and the brightness of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed.
In some embodiments, the obtaining the chromaticity and the brightness of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed includes the steps of:
(11) And stripping the upper polaroid and the lower polaroid from the liquid crystal panel to be tested.
(12) And measuring the liquid crystal panel to be detected after the upper polaroid and the lower polaroid are stripped, so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the upper polaroid and the lower polaroid are removed.
It should be noted that, the manner of removing the upper polarizer and the lower polarizer from the liquid crystal panel to be tested can measure the brightness of the backlight source of the liquid crystal panel to be tested and the brightness of the liquid crystal panel to be tested after removing the upper polarizer and the lower polarizer. And the light transmittance of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed is obtained.
(2) And acquiring the brightness of the liquid crystal panel to be tested in the backlight source.
(3) And obtaining the light transmittance of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed based on the brightness of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed and the brightness of the backlight source.
It should be noted that, the transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed is equal to the brightness of the liquid crystal panel to be tested after the upper polarizer is removed divided by the brightness of the backlight source. The specific formula is as follows: t2=l3/l=ar×η cf 。
It can be understood that T2 is the transmittance of the liquid crystal panel to be measured after the upper polarizer and the lower polarizer are removed. L3 is the brightness of the liquid crystal panel to be tested in a white picture after the upper polaroid and the lower polaroid are removed. Meanwhile, the influence of the liquid crystal box and the aperture ratio on the chromaticity of the liquid crystal panel to be tested can be verified by the formula.
104. And obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the lower polaroid is removed, and comparing the chromaticity of the liquid crystal panel to be tested after the lower polaroid is removed with the chromaticity of the liquid crystal panel to be compared after the lower polaroid is removed, so as to obtain a fourth comparison result.
It should be noted that, the chromaticity of the liquid crystal panel to be measured after the lower polarizer is removed and the chromaticity of the control liquid crystal panel are measured respectively. The method for measuring the chromaticity of the liquid crystal panel to be measured and the control liquid crystal panel after the lower polaroid is removed can be measured by a chromaticity measuring device. And subtracting the chromaticity of the liquid crystal panel to be detected from the chromaticity of the control liquid crystal panel after the lower polaroid is removed, so as to obtain a fourth comparison result. For example, the chromaticity of the liquid crystal panel to be tested after the lower polarizer is removed is: x=0.282, y=0.299, and x 5=0.279, y5=0.302, the chromaticity of the control liquid crystal panel after the polarizer is removed, and then the chromaticity difference between the liquid crystal panel to be tested and the control liquid crystal panel is x-x 5=0.002, y-y4= -0.002. Since the lower polarizer is removed, the influence of the upper polarizer on chromaticity can be judged. And determining that the upper polaroid influences the abnormal chromaticity of the liquid crystal panel to be tested if the total difference value of the chromaticity of the liquid crystal panel to be tested and the control liquid crystal panel after the lower polaroid is removed is larger than a preset threshold value.
The mode of removing the light transmittance of the lower polaroid of the liquid crystal panel to be tested can be used for measuring the brightness of the backlight source of the liquid crystal panel to be tested and the brightness of the liquid crystal panel to be tested after the lower polaroid is removed. And obtaining the light transmittance of the liquid crystal panel to be tested after the lower polaroid is removed. The light transmittance of the contrast liquid crystal panel after the lower polarizer is removed can also be measured by the same method as that of the liquid crystal panel to be measured, and of course, other manners can also be used for measuring, which is not repeated in the embodiment of the present application.
Referring to fig. 5, fig. 5 is a schematic structural diagram of the liquid crystal panel to be tested according to the embodiment of the present application after removing the lower polarizer. Wherein the liquid crystal panel to be measured as shown in fig. 5 may be measured to determine whether the chromaticity of the liquid crystal panel to be measured is abnormal. The liquid crystal panel to be tested comprises an upper polarizer 10, a liquid crystal box 20 and a lower polarizer 30. In addition, the lower polarizer 30 is partially peeled off.
In some embodiments, the obtaining the chromaticity and the transmittance of the liquid crystal panel to be measured after removing the lower polarizer includes the steps of:
(1) And obtaining the chromaticity and the brightness of the liquid crystal panel to be tested after the lower polaroid is removed.
In some embodiments, the obtaining the chromaticity and the brightness of the liquid crystal panel to be measured after the lower polarizer is removed includes the steps of:
(11) And stripping the lower polaroid from the liquid crystal panel to be tested.
(12) And measuring the liquid crystal panel to be detected after the lower polaroid is stripped, so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the lower polaroid is removed.
It should be noted that, the manner of removing the transmittance of the lower polarizer of the liquid crystal panel to be tested can measure the brightness of the backlight source of the liquid crystal panel to be tested and the brightness of the liquid crystal panel to be tested after removing the lower polarizer. And obtaining the light transmittance of the liquid crystal panel to be tested after the lower polaroid is removed.
(2) And acquiring the brightness of the liquid crystal panel to be tested in the backlight source.
(3) And obtaining the light transmittance of the liquid crystal panel to be tested after the lower polaroid is removed based on the brightness of the liquid crystal panel to be tested after the lower polaroid is removed and the brightness of the backlight source.
It should be noted that, the transmittance of the liquid crystal panel to be tested after the lower polarizer is removed is equal to the brightness of the white screen divided by the brightness of the backlight source after the liquid crystal panel to be tested removes the lower polarizer. The specific formula is as follows: t3=l4/l=η Upper polarizer polarized light *AR*η cf 。
It can be understood that T3 is the light transmittance of the liquid crystal panel to be tested after the lower polarizer is removed. L4 is the brightness of the liquid crystal panel to be tested in a white picture after the lower polaroid is removed.
In addition, T3/2 t2=η Upper polarizer polarized light The influence of the upper polarizer on the chromaticity abnormality of the liquid crystal panel to be tested can be verified through the formula.
105. And determining a detection result according to the first comparison result, the second comparison result, the third comparison result and the fourth comparison result.
It should be noted that, the first comparison result determines whether the chromaticity of the liquid crystal panel to be tested and the chromaticity of the control liquid crystal panel are abnormal. The second comparison result determines whether the lower polaroid has obvious influence on the chromaticity of the liquid crystal panel to be detected, the third comparison result determines whether the opening ratio of the liquid crystal box has obvious influence on the chromaticity of the liquid crystal panel to be detected, and the fourth comparison result determines whether the upper polaroid has obvious influence on the chromaticity of the liquid crystal panel to be detected.
In some embodiments, the determining the detection result according to the first comparison result, the second comparison result, the third comparison result, and the fourth comparison result includes the steps of:
if the first comparison result is larger than a preset threshold value; and comparing the second comparison result, the third comparison result and the fourth comparison result, and determining the checking result with the largest influence factor of the numerical value in the second comparison result, the third comparison result and the fourth comparison result.
It should be noted that if the first comparison result is greater than the preset threshold, determining that the chromaticity of the liquid crystal panel to be measured is abnormal, comparing the second comparison result, the third comparison result and the fourth comparison result at this time, determining that the numerical value of the result is the largest, and determining which is the influencing factor influencing the occurrence of the chromaticity abnormality of the liquid crystal panel to be measured.
Specifically, the chromaticity influence measurement scheme and calculation formula of the liquid crystal panel to be measured are summarized as follows:
the detection method of the liquid crystal panel provided by the embodiment of the application comprises the following steps: obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested, comparing the chromaticity of the liquid crystal panel to be tested with the chromaticity of the control liquid crystal panel to obtain a first comparison result, obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after removing the upper polaroid, comparing the chromaticity of the liquid crystal panel to be tested after removing the upper polaroid with the chromaticity of the control liquid crystal panel after removing the upper polaroid and the lower polaroid to obtain a second comparison result, obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after removing the upper polaroid and the lower polaroid, comparing the chromaticity of the liquid crystal panel to be tested after removing the lower polaroid with the chromaticity of the control liquid crystal panel after removing the lower polaroid to obtain a fourth comparison result, and determining a detection result according to the first comparison result, the second comparison result, the third comparison result and the fourth comparison result. According to the method, the liquid crystal panel to be detected and the control liquid crystal panel are subjected to chromaticity comparison under the condition that materials of all layers are removed respectively, so that comparison results under different conditions are obtained, then the greatest influence of the comparison results under which conditions is determined according to the comparison results, the detection result is determined, and therefore the reasons for influencing the chromaticity of the liquid crystal panel to be abnormal can be rapidly cleared.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the present disclosure. The embodiment of the application also provides a liquid crystal panel, and the liquid crystal panel manufactured by using the detection method of the liquid crystal panel is provided. The detection method of the liquid crystal panel has been described in detail in the above embodiments, so the detection method of the liquid crystal panel in the embodiments of the present application is not described in detail.
The above description is provided in detail for the detection method of the liquid crystal panel and the liquid crystal panel provided in the embodiments of the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the description of the above examples is only for aiding in understanding the present application. Meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.
Claims (9)
1. The detection method of the liquid crystal panel comprises an upper polaroid, a liquid crystal box and a lower polaroid, wherein the upper polaroid is arranged on the upper surface of the liquid crystal box, and the lower polaroid is arranged on the lower surface of the liquid crystal box.
Acquiring chromaticity and light transmittance of a liquid crystal panel to be detected in a white picture, and comparing the chromaticity of the liquid crystal panel to be detected with the chromaticity of a control liquid crystal panel to obtain a first comparison result;
obtaining chromaticity and light transmittance of a white picture after the upper polaroid of the liquid crystal panel to be tested is removed, and comparing the chromaticity of the liquid crystal panel to be tested after the upper polaroid of the liquid crystal panel to be tested is removed with the chromaticity of the liquid crystal panel to be compared after the upper polaroid of the liquid crystal panel to be tested is removed, so as to obtain a second comparison result;
obtaining chromaticity and light transmittance of the liquid crystal panel to be tested in a white picture after the upper polaroid and the lower polaroid are removed, and comparing the chromaticity of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed with the chromaticity of the liquid crystal panel to be compared after the upper polaroid and the lower polaroid are removed, so as to obtain a third comparison result;
obtaining chromaticity and light transmittance of a white picture after the lower polaroid is removed from the liquid crystal panel to be tested, and comparing the chromaticity of the liquid crystal panel to be tested after the lower polaroid is removed with the chromaticity of the liquid crystal panel to be tested after the lower polaroid is removed from the control liquid crystal panel to obtain a fourth comparison result;
and determining a detection result according to the first comparison result, the second comparison result, the third comparison result and the fourth comparison result.
2. The method for detecting a liquid crystal panel according to claim 1, wherein the step of obtaining chromaticity and transmittance of the liquid crystal panel to be detected in a white screen comprises:
acquiring chromaticity and brightness of a liquid crystal panel to be tested in a white picture;
acquiring the brightness of the liquid crystal panel to be tested in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested based on the brightness of the liquid crystal panel to be tested on the white picture and the brightness of the backlight source.
3. The method for detecting a liquid crystal panel according to claim 1, wherein the step of obtaining the chromaticity and the transmittance of the liquid crystal panel to be detected in a white screen after removing the upper polarizer comprises the steps of:
obtaining chromaticity and brightness of the liquid crystal panel to be tested after the upper polaroid is removed;
acquiring the brightness of the liquid crystal panel to be tested in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested after the upper polaroid is removed based on the brightness of the liquid crystal panel to be tested after the upper polaroid is removed and the brightness of the backlight source.
4. The method for detecting a liquid crystal panel according to claim 3, wherein the step of obtaining the chromaticity and the brightness of the liquid crystal panel to be detected after removing the upper polarizer comprises the steps of:
stripping the upper polaroid from the liquid crystal panel to be tested;
and measuring the liquid crystal panel to be detected after the upper polaroid is stripped, so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the upper polaroid is removed.
5. The method for detecting a liquid crystal panel according to claim 1, wherein the step of obtaining the chromaticity and the transmittance of the liquid crystal panel to be detected in a white screen after removing the upper polarizer and the lower polarizer comprises:
obtaining chromaticity and brightness of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed;
acquiring the brightness of the liquid crystal panel to be tested in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed based on the brightness of the liquid crystal panel to be tested after the upper polaroid and the lower polaroid are removed and the brightness of the backlight source.
6. The method for detecting a liquid crystal panel according to claim 5, wherein the step of obtaining the chromaticity and the brightness of the liquid crystal panel to be detected after removing the upper polarizer and the lower polarizer comprises:
stripping the upper polaroid and the lower polaroid from the liquid crystal panel to be tested;
and measuring the liquid crystal panel to be detected after the upper polaroid and the lower polaroid are stripped, so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the upper polaroid and the lower polaroid are removed.
7. The method for detecting a liquid crystal panel according to claim 1, wherein the step of obtaining chromaticity and transmittance of the liquid crystal panel to be detected in a white screen after removing the lower polarizer comprises:
obtaining chromaticity and brightness of the liquid crystal panel to be tested after the lower polaroid is removed;
acquiring the brightness of the liquid crystal panel to be tested in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested after the lower polaroid is removed based on the brightness of the liquid crystal panel to be tested after the lower polaroid is removed and the brightness of the backlight source.
8. The method for detecting a liquid crystal panel according to claim 7, wherein the step of obtaining the chromaticity and the brightness of the liquid crystal panel to be detected after removing the lower polarizer comprises:
peeling the lower polaroid from the liquid crystal panel to be tested;
and measuring the liquid crystal panel to be detected after the lower polaroid is stripped, so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the lower polaroid is removed.
9. The method for detecting a liquid crystal panel according to claim 1, wherein determining the detection result according to the first, second, third and fourth comparison results comprises:
if the first comparison result is larger than a preset threshold value; and comparing the second comparison result, the third comparison result and the fourth comparison result, and determining the checking result with the largest influence factor of the numerical value in the second comparison result, the third comparison result and the fourth comparison result.
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