CN111722422A - 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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- CN111722422A CN111722422A CN202010525557.2A CN202010525557A CN111722422A CN 111722422 A CN111722422 A CN 111722422A CN 202010525557 A CN202010525557 A CN 202010525557A CN 111722422 A CN111722422 A CN 111722422A
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- G—PHYSICS
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- 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 for 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 contrast liquid crystal panel to obtain a first comparison result, comparing the chromaticity of the liquid crystal panel to be detected with the upper polarizer removed with the chromaticity of the contrast liquid crystal panel with the upper polarizer removed to obtain a second comparison result, comparing the chromaticity of the liquid crystal panel to be detected with the upper polarizer removed with the lower polarizer removed with the chromaticity of the contrast liquid crystal panel to obtain a third comparison result, comparing the chromaticity of the liquid crystal panel to be detected with the lower polarizer removed with the chromaticity of the contrast liquid crystal panel to obtain a fourth comparison result, and determining the 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 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 liquid crystal panel and a detection method thereof.
Background
The chromaticity of the liquid crystal television affects the subjective feeling of the audience and is a parameter which is perceived by the consumer all the time. The liquid crystal panel and the BLU are combined to 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 a product specification. Optical measurements are usually required for monitoring. The liquid crystal panel has many layer materials, which are complex systems, and each layer material affects 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 influence factor becomes a technical problem to be solved urgently by those skilled in the art.
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 for influencing the abnormal chromaticity of the liquid crystal panel.
The application provides a detection method of a liquid crystal panel, the liquid crystal 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:
obtaining 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 comparison 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 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 tested after the upper polaroid is removed, so as to obtain a second comparison result;
obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed, and comparing the chromaticity of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed with the chromaticity of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed, so as to obtain a third comparison result;
obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the lower polarizer is removed, and comparing the chromaticity of the liquid crystal panel to be tested after the lower polarizer is removed with the chromaticity of the contrast liquid crystal panel after the lower polarizer 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.
In some embodiments, the obtaining the chromaticity and the transmittance of the liquid crystal panel to be tested includes:
acquiring the chromaticity and the brightness of a white picture of a liquid crystal panel to be detected;
acquiring the brightness of a liquid crystal panel to be detected in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be detected based on the brightness of the liquid crystal panel to be detected in the white picture and the brightness of the backlight source.
In some embodiments, the obtaining of the chromaticity and the transmittance of the liquid crystal panel to be tested after the removal of the upper polarizer includes:
obtaining the chromaticity and brightness of the liquid crystal panel to be tested after the upper polaroid is removed;
acquiring the brightness of a liquid crystal panel to be detected 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 tested after the polarizer is removed 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 of the chromaticity and the transmittance of the liquid crystal panel to be tested after removing the upper polarizer and the lower polarizer includes:
obtaining the chromaticity and brightness of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed;
acquiring the brightness of a liquid crystal panel to be detected in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed based on the brightness of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer 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 removing the upper polarizer and the lower polarizer includes:
stripping the upper polarizer and the lower polarizer from the liquid crystal panel to be tested;
and measuring the liquid crystal panel to be detected after the upper polarizer and the lower polarizer are peeled off to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the upper polarizer and the lower polarizer are removed.
In some embodiments, the obtaining the chromaticity and the transmittance of the liquid crystal panel to be tested after removing the lower polarizer includes:
obtaining the chromaticity and the brightness of the liquid crystal panel to be tested after the lower polarizer is removed;
acquiring the brightness of a liquid crystal panel to be detected in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested after the lower polarizer is removed based on the brightness of the liquid crystal panel to be tested after the lower polarizer 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 tested after removing the lower polarizer includes:
peeling the lower polarizer from the liquid crystal panel to be tested;
and measuring the liquid crystal panel to be detected after the lower polarizer is peeled off so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the lower polarizer is removed.
In some embodiments, the determining a 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 inspection result with the largest numerical influence factor 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 using the detection method of the liquid crystal panel.
The embodiment of the application provides a detection method of a liquid crystal panel and the liquid crystal panel, and the detection method of the liquid crystal panel 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 contrast 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 the upper polarizer is removed, comparing the chromaticity of the liquid crystal panel to be tested after the upper polarizer is removed with the chromaticity of the contrast liquid crystal panel after the upper polarizer is removed to obtain a second comparison result, obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed, comparing the chromaticity of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed with the chromaticity of the liquid crystal panel to be tested after the lower polarizer is removed to obtain a third comparison result, obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the lower polarizer is removed, comparing the chromaticity of the liquid crystal panel to be tested after the lower polarizer is removed with the, and obtaining a fourth comparison result, and determining the detection result according to the first comparison result, the second comparison result, the third comparison result and the fourth comparison result. The application carries out the colourity contrast through liquid crystal display panel and the contrast liquid crystal display panel that will await measuring under the condition that each layer material was rejected respectively to obtain the contrast result under the different situation, then confirm according to the contrast result that appears influences the biggest under which kind of condition influences, confirm the testing result, thereby can clear clearly influence the reason that the colourity of liquid crystal display panel appears unusually fast.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
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 after the polarizer is removed in the embodiment of the application.
Fig. 4 is a schematic structural diagram of the liquid crystal panel to be tested according to the embodiment of the 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 after removing the lower polarizer according to the embodiment of the application.
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 is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a detection method of a liquid crystal panel and a 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 schematic flow chart illustrating a method for inspecting a liquid crystal panel according to an embodiment of the present disclosure. The embodiment of the present application provides a method for detecting a liquid crystal panel, where the liquid crystal panel includes an upper polarizer, a liquid crystal cell, and a lower polarizer, the upper polarizer is disposed on an upper surface of the liquid crystal cell, and the lower polarizer is disposed on a lower surface of the liquid crystal cell, including the steps of:
101. and obtaining 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 comparison liquid crystal panel to obtain a first comparison result.
It should be noted that the chromaticity of the liquid crystal panel to be measured and the chromaticity of the reference 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. In the embodiment of the present application, the detailed measurement method for measuring the chromaticity of the liquid crystal panel to be measured and the reference liquid crystal panel is not described in detail. In addition, the chromaticity of the liquid crystal panel to be measured and the chromaticity of the comparison liquid crystal panel are subtracted to obtain a first comparison result. And if the numerical value of the first comparison result exceeds a preset threshold value, the chromaticity of the liquid crystal panel to be detected is abnormal. It is understood that the preset threshold can be determined according to the requirement, for example, the preset threshold is 0.001. For another example, if the chromaticity of the liquid crystal panel to be tested, x is 0.279, y is 0.303, the chromaticity of the comparison liquid crystal panel, x1 is 0.273, and y1 is 0.311, then the chromaticity difference between the liquid crystal panel to be tested and the comparison liquid crystal panel is x-x1 is 0.006, and y-y1 is-0.009, then the total difference value of the chromaticities is greater than the preset threshold value, and it is determined that the chromaticity of the liquid crystal panel to be tested is abnormal.
The light transmittance of the liquid crystal panel to be measured can be measured by measuring 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 the backlight source penetrates through the liquid crystal panel. Thereby obtaining the light transmittance of the liquid crystal panel to be measured. The contrast liquid crystal panel can also be measured by the same method as the liquid crystal panel to be measured, and of course, other methods can also be adopted for measurement, which are not described in detail in the embodiment of the 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 under test as shown in fig. 2 may be measured to determine whether the chromaticity of the liquid crystal panel under test is abnormal. The liquid crystal panel to be tested includes an upper polarizer 10, a liquid crystal cell 20, and a lower polarizer 30.
In some embodiments, the obtaining of the chromaticity and the transmittance of the liquid crystal panel to be tested specifically includes:
(1) and acquiring the chromaticity and the brightness of the liquid crystal panel to be detected in a white picture.
(2) And acquiring the brightness of the liquid crystal panel to be detected in the backlight source.
(3) And obtaining the light transmittance of the liquid crystal panel to be detected based on the brightness of the liquid crystal panel to be detected in the white picture and the brightness of the backlight source.
The light transmittance of the liquid crystal panel to be tested is equal to the luminance of the liquid crystal panel to be tested on a white screen divided by the luminance of the backlight source, and the specific formula is that T is L1/L is ηNatural light of lower polarizer*AR*ηcf*ηLC*ηThe upper polarizer polarizes light.Specifically, T represents the transmittance of the liquid crystal panel to be tested, L1 represents the brightness of the white screen of the liquid crystal panel to be tested, which is also the brightness of the white screen passing through the liquid crystal panel to be tested, ηNatural light of lower polarizerShowing the transmission spectrum of the lower polarizer to incident natural light, and AR showing the crystal face of the liquid to be measuredTransmission spectrum of plate aperture ratio, ηcfIndicating the transmission spectra of the respective layers in the liquid crystal cell, ηLCRepresenting the efficiency through the spectrum, ηPolarized light of upper polarizerThe transmission spectrum of the incident polarized light by the upper polarizer is shown.
From the above, the light transmittance of the liquid crystal panel to be tested can be obtained through the brightness of the liquid crystal panel to be tested on the white picture 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 contrast liquid crystal panel after the upper polaroid is removed to obtain a second comparison result.
It should be noted that, the chromaticity of the liquid crystal panel to be tested after the polarizer is removed and the chromaticity of the reference liquid crystal panel are measured respectively. The method for measuring the chromaticity of the liquid crystal panel to be measured and the liquid crystal panel after the upper polarizer is removed can adopt a chromaticity measuring device for measurement. And subtracting the chromaticity of the liquid crystal panel to be detected from the chromaticity of the reference liquid crystal panel after the upper polaroid is removed to obtain a second comparison result. For example, the chromaticity of the liquid crystal panel to be tested after the polarizer is removed is: x is 0.282 and y is 0.300, and the chromaticity of the control liquid crystal panel after removing the upper polarizer is: x2 is 0.279, y2 is 0.303, then the chromaticity difference between the liquid crystal panel to be tested and the control liquid crystal panel is: x-x2 ═ 0.002, y-y2 ═ 0.002. Because the upper polarizer is removed, the influence of the lower polarizer on the chromaticity can be judged. And if the total difference value of the chromaticity of the liquid crystal panel to be tested and the reference liquid crystal panel after the upper polaroid is removed is larger than a preset threshold value, determining that the lower polaroid has influence on the chromaticity abnormity of the liquid crystal panel to be tested.
The method for removing the light transmittance of the upper polarizer 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 polarizer is removed. Thereby obtaining the light transmittance of the liquid crystal panel to be tested after the upper polaroid is removed. The light transmittance of the liquid crystal panel after the upper polarizer is removed can be measured by adopting the same method of the liquid crystal panel to be measured, and of course, other methods can be adopted for measurement, which is not repeated in the embodiment of the application.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a liquid crystal panel to be tested according to an embodiment of the present application after removing a polarizer. The liquid crystal panel under test as shown in fig. 3 may be measured to determine whether the chromaticity of the liquid crystal panel under test 100 is abnormal. The liquid crystal panel to be tested includes an upper polarizer 10, a liquid crystal cell 20, and a lower polarizer 30. Wherein, the upper polarizer 10 is partially peeled off.
In some embodiments, the obtaining of the chromaticity and the transmittance of the liquid crystal panel to be tested after the removal of the upper polarizer includes:
(1) and obtaining the chromaticity and the brightness of the liquid crystal panel to be tested after the polarizer is removed.
In some embodiments, the obtaining the chromaticity and the brightness of the liquid crystal panel to be tested after the polarizer is removed 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 method for removing the transmittance of the upper 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 the upper polarizer is removed. Thereby 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 detected 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.
The transmittance of the liquid crystal panel under test after removing the polarizer is equal to the luminance of the white picture of the liquid crystal panel under test after removing the polarizer, divided by the luminance of the backlight source, and the specific formula is that T1-L2/L- ηNatural light of lower polarizer*AR*ηcf。
It can be understood that T1 is the transmittance of the liquid crystal panel under test after the upper polarizer is removed. L2 is the brightness of the white picture of the LCD panel to be tested after removing the upper polarizer. By the formulaT1＝L2/L＝ηNatural light of lower polarizer*AR*ηcfThe influence of the lower polarizer 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 polarizer and the lower polarizer are removed, and comparing the chromaticity of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed with the chromaticity of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed, so as to obtain a third comparison result.
It should be noted that, 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 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 liquid crystal panel contrast after the upper polarizer and the lower polarizer are removed can adopt a chromaticity measuring device to measure. And subtracting the chromaticity of the liquid crystal panel to be detected from the chromaticity of the reference liquid crystal panel after the upper polarizer and the lower polarizer are removed 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: x is 0.275, y is 0.291, and the chromaticity after removing the upper polarizer and the lower polarizer of the comparative liquid crystal panel is: x3 is 0.274, y3 is 0.392, and the chromaticity difference between the liquid crystal panel to be tested and the liquid crystal panel to be compared is x-x3 is 0.001, and y-y3 is-0.001. Because the upper polarizer and the lower polarizer are removed, the influence of the liquid crystal box on the chromaticity can be judged. And determining that the liquid crystal box has small influence on the abnormal chromaticity if the total difference value of the chromaticities of the liquid crystal panel to be tested and the contrast liquid crystal panel after the upper polaroid and the lower polaroid are removed is not larger than a preset threshold value.
The method for measuring the light transmittance of the liquid crystal panel to be measured after the upper polarizer and the lower polarizer are removed can 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 the upper polarizer and the lower polarizer are removed. And obtaining the light transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed. The light transmittance of the liquid crystal panel after the upper polarizer and the lower polarizer are removed can also be measured by adopting the same method of the liquid crystal panel to be measured, and of course, other methods can also be adopted for measurement, which is not described in detail in the embodiment of the application.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a liquid crystal panel to be tested according to an embodiment of the present application after removing an upper polarizer and a lower polarizer. The liquid crystal panel under test 100 shown in fig. 4 may be measured to determine whether the chromaticity of the liquid crystal panel under test is abnormal. The liquid crystal panel to be tested includes an upper polarizer 10, a liquid crystal cell 20, and a lower polarizer 30. Wherein, the upper polarizer 10 and the lower polarizer 30 are both partially peeled off.
In some embodiments, the obtaining of the chromaticity and the transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed includes:
(1) and obtaining the chromaticity and brightness of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed.
In some embodiments, the obtaining of the chromaticity and the brightness of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed includes:
(11) and stripping the upper polarizer and the lower polarizer from the liquid crystal panel to be tested.
(12) And measuring the liquid crystal panel to be detected after the upper polarizer and the lower polarizer are peeled off to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the upper polarizer and the lower polarizer are removed.
It should be noted that the light transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed can be measured by 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 polarizer and the lower polarizer are removed. And obtaining the light transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed.
(2) And acquiring the brightness of the liquid crystal panel to be detected in the backlight source.
(3) And obtaining the light transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed based on the brightness of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed and the brightness of the backlight source.
The transmittance of the liquid crystal panel to be tested after removing the upper polarizer and the lower polarizer is equal to the luminance of the white picture of the liquid crystal panel to be tested after removing the upper polarizer divided by the luminance of the backlight sourcecf。
It can be understood that T2 is the transmittance of the liquid crystal panel under test after the upper polarizer and the lower polarizer are removed. L3 is the brightness of the white picture of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed. Meanwhile, the influence of the liquid crystal box and the aperture opening 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 polarizer is removed, and comparing the chromaticity of the liquid crystal panel to be tested after the lower polarizer is removed with the chromaticity of the contrast liquid crystal panel after the lower polarizer is removed 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 reference liquid crystal panel are measured respectively. The method for measuring the chromaticity of the liquid crystal panel to be measured and the reference liquid crystal panel after the lower polarizer is removed can adopt a chromaticity measuring device to measure. And subtracting the chromaticity of the liquid crystal panel to be detected from the chromaticity of the reference liquid crystal panel after the lower polarizer is removed to obtain a fourth comparison result. For example, the chromaticity of the liquid crystal panel to be measured after removing the lower polarizer is: x is 0.282, y is 0.299, the chromaticity of the comparison liquid crystal panel after the polarizer is removed, x5 is 0.279, and y5 is 0.302, so that the chromaticity difference between the liquid crystal panel to be tested and the comparison liquid crystal panel is x-x5 is 0.002, and y-y4 is-0.002. Since the lower polarizer is removed, the influence of the upper polarizer on chromaticity can be judged. And if the total difference value of the chromaticity of the liquid crystal panel to be tested and the reference liquid crystal panel after the lower polarizer is removed is larger than a preset threshold value, determining that the upper polarizer has influence on the chromaticity abnormality of the liquid crystal panel to be tested.
The method for measuring the light transmittance of the liquid crystal panel to be measured by removing the lower polarizer can 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 the lower polarizer is removed. Thereby obtaining the light transmittance of the liquid crystal panel to be tested after the lower polarizer is removed. The light transmittance after the lower polarizer is removed by contrast of the liquid crystal panel can also be measured by adopting the same method of the liquid crystal panel to be measured, and of course, other methods can also be adopted for measurement, which is not repeated in the embodiment of the 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. In which, the liquid crystal panel to be tested as shown in fig. 5 can be measured to determine whether the chromaticity of the liquid crystal panel to be tested is abnormal. The liquid crystal panel to be tested includes an upper polarizer 10, a liquid crystal cell 20, and a lower polarizer 30. In addition, the lower polarizer 30 is partially peeled off.
In some embodiments, the obtaining of the chromaticity and the transmittance of the liquid crystal panel to be tested after the lower polarizer is removed includes:
(1) and acquiring the chromaticity and the brightness of the liquid crystal panel to be tested after the lower polarizer is removed.
In some embodiments, the obtaining of the chromaticity and the brightness of the liquid crystal panel to be tested after the lower polarizer is removed includes:
(11) and peeling the lower polarizer from the liquid crystal panel to be tested.
(12) And measuring the liquid crystal panel to be detected after the lower polarizer is peeled off so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the lower polarizer is removed.
It should be noted that the method for removing the transmittance of the lower polarizer of the liquid crystal panel to be tested can measure the luminance of the backlight of the liquid crystal panel to be tested and the luminance of the liquid crystal panel to be tested after the lower polarizer is removed. Thereby obtaining the light transmittance of the liquid crystal panel to be tested after the lower polarizer is removed.
(2) And acquiring the brightness of the liquid crystal panel to be detected in the backlight source.
(3) And obtaining the light transmittance of the liquid crystal panel to be tested after the lower polarizer is removed based on the brightness of the liquid crystal panel to be tested after the lower polarizer is removed and the brightness of the backlight source.
The transmittance of the liquid crystal panel to be tested after removing the lower polarizer is equal to the luminance of the white picture of the liquid crystal panel to be tested after removing the lower polarizer, divided by the luminance of the backlight sourcePolarized light of upper polarizer*AR*ηcf。
It can be understood that T3 is the transmittance of the lcd panel under test after removing the lower polarizer. L4 is the brightness of the white picture after the lower polarizer of the liquid crystal panel to be tested is removed.
In addition, T3/2T2 is ηPolarized light of upper polarizerThrough thisThe formula can verify the influence of the upper polarizer on the chromaticity abnormality of the liquid crystal panel to be tested.
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 chromaticities of the liquid crystal panel to be tested and the comparison liquid crystal panel are abnormal. The second comparison result determines whether the lower polarizer has obvious influence on the chromaticity abnormality 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 abnormality of the liquid crystal panel to be detected, and the fourth comparison result determines whether the upper polarizer has obvious influence on the chromaticity abnormality of the liquid crystal panel to be detected.
In some embodiments, the determining a 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 inspection result with the largest numerical influence factor 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, it is determined that the chromaticity of the liquid crystal panel to be detected is abnormal, at this time, the second comparison result, the third comparison result, and the fourth comparison result are compared, and it is determined that the result has the largest numerical value, which is the influence factor influencing the color chromaticity abnormality of the liquid crystal panel to be detected is determined.
Specifically, the scheme for measuring the influence of the liquid crystal panel to be measured on the chromaticity and the calculation formula are summarized as the following summary table:
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 contrast 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 the upper polarizer is removed, comparing the chromaticity of the liquid crystal panel to be tested after the upper polarizer is removed with the chromaticity of the contrast liquid crystal panel after the upper polarizer is removed to obtain a second comparison result, obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed, comparing the chromaticity of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed with the chromaticity of the liquid crystal panel to be tested after the lower polarizer is removed to obtain a third comparison result, obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the lower polarizer is removed, comparing the chromaticity of the liquid crystal panel to be tested after the lower polarizer is removed with the, and obtaining a fourth comparison result, and determining the detection result according to the first comparison result, the second comparison result, the third comparison result and the fourth comparison result. The application carries out the colourity contrast through liquid crystal display panel and the contrast liquid crystal display panel that will await measuring under the condition that each layer material was rejected respectively to obtain the contrast result under the different situation, then confirm according to the contrast result that appears influences the biggest under which kind of condition influences, confirm the testing result, thereby can clear clearly influence the reason that the colourity of liquid crystal display panel appears unusually fast.
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. In the above embodiments, the detection method of the liquid crystal panel has been described in detail, and therefore, the detection method of the liquid crystal panel in the embodiments of the present application is not described in detail.
The method for detecting a liquid crystal panel and the liquid crystal panel provided in the embodiments of the present application are described in detail above, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the description of the above embodiments is only used to help understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A detection method of a liquid crystal panel, wherein the liquid crystal panel comprises an upper polarizer, a liquid crystal box and a lower polarizer, the upper polarizer is arranged on the upper surface of the liquid crystal box, and the lower polarizer is arranged on the lower surface of the liquid crystal box, and the detection method is characterized by comprising the following steps:
obtaining 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 comparison 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 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 tested after the upper polaroid is removed, so as to obtain a second comparison result;
obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed, and comparing the chromaticity of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed with the chromaticity of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed, so as to obtain a third comparison result;
obtaining the chromaticity and the light transmittance of the liquid crystal panel to be tested after the lower polarizer is removed, and comparing the chromaticity of the liquid crystal panel to be tested after the lower polarizer is removed with the chromaticity of the contrast liquid crystal panel after the lower polarizer 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.
2. The method for detecting the liquid crystal panel according to claim 1, wherein the obtaining of the chromaticity and the transmittance of the liquid crystal panel to be detected comprises:
acquiring the chromaticity and the brightness of a white picture of a liquid crystal panel to be detected;
acquiring the brightness of a liquid crystal panel to be detected in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be detected based on the brightness of the liquid crystal panel to be detected in the white picture and the brightness of the backlight source.
3. The method for inspecting the liquid crystal panel according to claim 1, wherein the obtaining of the chromaticity and the transmittance of the liquid crystal panel to be inspected after the removal of the polarizer comprises:
obtaining the chromaticity and brightness of the liquid crystal panel to be tested after the upper polaroid is removed;
acquiring the brightness of a liquid crystal panel to be detected 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 inspecting the liquid crystal panel according to claim 3, wherein the obtaining of the chromaticity and the brightness of the liquid crystal panel to be inspected after the polarizer is removed comprises:
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 inspecting a liquid crystal panel according to claim 1, wherein the obtaining of the chromaticity and transmittance of the liquid crystal panel to be inspected after removing the upper polarizer and the lower polarizer comprises:
obtaining the chromaticity and brightness of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed;
acquiring the brightness of a liquid crystal panel to be detected in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed based on the brightness of the liquid crystal panel to be tested after the upper polarizer and the lower polarizer are removed and the brightness of the backlight source.
6. The method for inspecting the liquid crystal panel according to claim 5, wherein the obtaining of the chromaticity and the brightness of the liquid crystal panel to be inspected after removing the upper polarizer and the lower polarizer comprises:
stripping the upper polarizer and the lower polarizer from the liquid crystal panel to be tested;
and measuring the liquid crystal panel to be detected after the upper polarizer and the lower polarizer are peeled off to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the upper polarizer and the lower polarizer are removed.
7. The method for detecting the liquid crystal panel according to claim 1, wherein the obtaining of the chromaticity and the transmittance of the liquid crystal panel to be detected after the lower polarizer is removed comprises:
obtaining the chromaticity and the brightness of the liquid crystal panel to be tested after the lower polarizer is removed;
acquiring the brightness of a liquid crystal panel to be detected in a backlight source;
and obtaining the light transmittance of the liquid crystal panel to be tested after the lower polarizer is removed based on the brightness of the liquid crystal panel to be tested after the lower polarizer is removed and the brightness of the backlight source.
8. The method for inspecting a liquid crystal panel according to claim 7, wherein the obtaining of the chromaticity and the brightness of the liquid crystal panel to be inspected after removing the lower polarizer comprises:
peeling the lower polarizer from the liquid crystal panel to be tested;
and measuring the liquid crystal panel to be detected after the lower polarizer is peeled off so as to obtain the chromaticity and the brightness of the liquid crystal panel to be detected after the lower polarizer is removed.
9. The method for inspecting a liquid crystal panel according to claim 1, wherein the determining a result of inspection based on 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 inspection result with the largest numerical influence factor in the second comparison result, the third comparison result and the fourth comparison result.
10. A liquid crystal panel manufactured by the method for inspecting a liquid crystal panel according to any one of claims 1 to 9.
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