CN111338119B - Color filter substrate and chromaticity measuring method - Google Patents
Color filter substrate and chromaticity measuring method Download PDFInfo
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- 239000000758 substrate Substances 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 490
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 230000003287 optical effect Effects 0.000 claims description 16
- 238000000691 measurement method Methods 0.000 claims description 14
- 239000003086 colorant Substances 0.000 claims description 7
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 229920002120 photoresistant polymer Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004737 colorimetric analysis Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000012512 characterization method Methods 0.000 description 1
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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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
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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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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Abstract
A color filter substrate and a chromaticity measuring method are provided, the color filter substrate includes: a test structure, the test structure comprising: the second shading pattern layer is provided with a second opening group, the second opening group comprises a first test opening, and the aperture opening rates of the first test opening and the first display opening are the same; the second filtering layer group comprises a first testing filtering layer, and the first testing filtering layer covers the first testing opening; the first test filter layer is provided with a first characteristic width direction, the first test filter layer is divided into a first test area and a second test area along the direction perpendicular to the first characteristic width direction, the first test area is provided with a first minimum width and a first maximum width along the first characteristic width direction, the second test area is provided with a second minimum width and a second maximum width along the first characteristic width direction, the second minimum width is larger than or equal to the first maximum width, and the second maximum width is larger than the first maximum width. The performance of the color filter substrate is improved.
Description
Technical Field
The invention relates to the field of liquid crystal display, in particular to a color filter substrate and a chromaticity measuring method.
Background
In recent years, with the development of the field of information communication, the demand for various types of display devices has been increasing. Currently, mainstream display devices include: liquid crystal displays, plasma displays, electroluminescent displays, vacuum fluorescent displays, and the like. Since the lcd has advantages of light weight, thinness, small volume, low power consumption, low radiation, etc., the lcd is widely used in various data processing devices, such as televisions, notebooks, mobile phones, personal digital assistants, etc.
The liquid crystal display mainly includes: the liquid crystal display panel comprises a TFT array substrate, a color filter substrate, and a liquid crystal layer between the TFT array substrate and the color filter substrate. The electrodes on the TFT array substrate and the color filter substrate control the deflection of liquid crystal molecules to adjust the passing rate of external light, so that the display purpose is achieved.
The color filter substrate comprises a transparent glass substrate, a shading pattern layer (BM) positioned on the transparent glass substrate, and a filter layer (RGB layer) positioned on the shading pattern layer and the transparent glass substrate, wherein the filter layer covers an opening area of the shading pattern layer, and the filter layer is overlapped with the shading pattern layer.
However, the performance of the existing color filter substrate is poor.
Disclosure of Invention
The invention provides a color filter substrate and a chromaticity measuring method to improve the performance of the color filter substrate.
In order to solve the above problems, the present invention provides a color filter substrate, including: a light-transmitting substrate including a display region and a non-display region surrounding the display region; the first shading pattern layer is positioned on the display area of the light-transmitting substrate, and a first opening group is arranged in the first shading pattern layer and comprises a first display opening; the first filtering layer group is positioned on the display area of the light-transmitting substrate and comprises a first display filtering layer, and the first display filtering layer covers the first display opening; a test structure on a non-display area of a light-transmissive substrate, the test structure comprising: the second shading pattern layer is provided with a second opening group, the second opening group comprises a first testing opening, and the opening rate of the first testing opening is equal to that of the first display opening; the second filtering layer group comprises a first testing filtering layer, the color of the first testing filtering layer is the same as that of the first display filtering layer, and the first testing filtering layer covers the first testing opening; the first test filter layer is provided with a first characteristic width direction, the first test filter layer is divided into a first test area and a second test area along the direction perpendicular to the first characteristic width direction, the second test area is adjacent to the first test area, the first test area is provided with a first minimum width and a first maximum width along the first characteristic width direction, the second test area is provided with a second minimum width and a second maximum width along the first characteristic width direction, the second minimum width is larger than or equal to the first maximum width, and the second maximum width is larger than the first maximum width.
Optionally, the first test filter layer has a first projection pattern on the surface of the light-transmitting substrate, and the first projection pattern is trapezoidal; the first characteristic width direction is vertical to the height direction of the first projection pattern and parallel to the surface of the light-transmitting substrate.
Optionally, the first test filter layer has a first projection pattern on the surface of the light-transmitting substrate, and the first projection pattern is in an "L" shape; the shape of the projection pattern of the first test area on the surface of the light-transmitting substrate is rectangular, and the shape of the projection pattern of the second test area on the surface of the light-transmitting substrate is rectangular.
Optionally, the thickness of the first test filter layer is equal to the thickness of the first display filter layer.
Optionally, the first test filter layer has a first projection pattern on the surface of the transparent substrate, the first projection pattern has a first maximum inscribed circle, and the diameter range of the first maximum inscribed circle is 10 micrometers to 30 micrometers.
Optionally, the first display opening and the first test opening have the same shape, or the first display opening and the first test opening have different shapes.
Optionally, the first opening group further includes a second display opening and a third display opening; the first filter layer group further includes: the colors of the second display filter layer, the third display filter layer and the first display filter layer are different; the second display filter layer covers the second display opening; the third display filter layer covers the third display opening; the second opening group further comprises a second test opening and a third test opening, the aperture ratio of the second test opening is equal to the aperture ratio of the second display opening, and the aperture ratio of the third test opening is equal to the aperture ratio of the third display opening; the second filter layer group further includes: the color of the second test filter layer is the same as that of the second display filter layer, and the second test filter layer is positioned in the second test opening; the third test filter layer is the same as the third display filter layer in color and is positioned in the third test opening; the second test filter layer is provided with a second characteristic width direction, the second test filter layer is divided into a third test area and a fourth test area along the direction vertical to the second characteristic width direction, the fourth test area is adjacent to the third test area, the third test area is provided with a third minimum width and a third maximum width along the second characteristic width direction, the fourth test area is provided with a fourth minimum width and a fourth maximum width along the second characteristic width direction, the fourth minimum width is greater than or equal to the third maximum width, and the fourth maximum width is greater than the third maximum width; the third test filter layer has a third feature width direction, the third test filter layer is divided into a fifth test area and a sixth test area along a direction perpendicular to the third feature width direction, the sixth test area is adjacent to the fifth test area, the fifth test area has a fifth minimum width and a fifth maximum width along the third feature width direction, the sixth test area has a sixth minimum width and a sixth maximum width along the third feature width direction, the sixth minimum width is greater than or equal to the fifth maximum width, and the sixth maximum width is greater than the fifth maximum width.
Optionally, the second test filter layer has a second projection pattern on the surface of the light-transmitting substrate, and the third test filter layer has a third projection pattern on the surface of the light-transmitting substrate; the shape of the second projection pattern is trapezoidal, the second characteristic width direction is perpendicular to the height direction of the second projection pattern and parallel to the surface of the light-transmitting substrate, or the shape of the second projection pattern is L-shaped, the shape of the projection pattern of the third test area on the surface of the light-transmitting substrate is rectangular, and the shape of the projection pattern of the fourth test area on the surface of the light-transmitting substrate is rectangular; the third projection pattern is trapezoidal, the third characteristic width direction is perpendicular to the height direction of the third projection pattern and parallel to the surface of the light-transmitting substrate, or the third projection pattern is L-shaped, the projection pattern of the fifth test area on the surface of the light-transmitting substrate is rectangular, and the projection pattern of the sixth test area on the surface of the light-transmitting substrate is rectangular.
Optionally, the second display opening and the second test opening have the same or different shapes; the third display opening and the third test opening are the same or different in shape; the first display opening, the second display opening and the third display opening are the same in shape and size; the first test opening, the second test opening and the third test opening are identical in shape and size.
Optionally, the thickness of the second test filter layer is equal to the thickness of the second display filter layer; the thickness of the third test filter layer is equal to the thickness of the third display filter layer.
Optionally, the second test filter layer has a second projection pattern on the surface of the light-transmitting substrate, the second projection pattern has a second maximum inscribed circle, and the diameter range of the second maximum inscribed circle is 10 micrometers to 30 micrometers; the third test filter layer is provided with a third projection pattern on the surface of the light-transmitting substrate, the third projection pattern is provided with a third maximum inscribed circle, and the diameter range of the third maximum inscribed circle is 10-30 micrometers.
Optionally, the third characteristic width direction, the second characteristic width direction and the first characteristic width direction are parallel; and a first test filter layer, a second test filter layer and a third test filter layer in the second filter layer group are arranged along the direction parallel to the width direction of the first characteristic.
Optionally, any one of the second opening groups includes two first test openings, two second test openings, and two third test openings; any one second filter layer group comprises two first test filter layers, two second test filter layers and two third test filter layers; the two first test filter layers are respectively a first position test filter layer and a fourth position test filter layer, the two second test filter layers are respectively a second position test filter layer and a fifth position test filter layer, and the two third test filter layers are respectively a third position test filter layer and a sixth position test filter layer; the first position test filter layer to the sixth position test filter layer are sequentially arranged along the first characteristic width direction, and the first position test filter layer and the fourth position test filter layer are centrosymmetric; the second position test filter layer and the fifth position test filter layer are centrosymmetric, and the third position test filter layer and the sixth position test filter layer are centrosymmetric; the first position test filter layer and the second position test filter layer are centrosymmetric, and the second position test filter layer and the third position test filter layer are centrosymmetric; the fifth position test filter layer and the fourth position test filter layer are centrosymmetric; the sixth position test filter layer and the fifth position test filter layer are centrosymmetric.
The invention also provides a chromaticity measuring method, which comprises the following steps: providing the color filter substrate of any one of the above items; and acquiring first chromaticity information of the first test filter layer by adopting an optical chromaticity measurement method, wherein a projection pattern of a light spot of incident light adopted by the optical chromaticity measurement method on the surface of the first test filter layer is positioned in the first test filter layer.
Compared with the prior art, the technical scheme of the invention has the following advantages:
in the color filter substrate provided by the technical scheme of the invention, the test structure comprises a first test filter layer, and the first test filter layer covers the first test opening; the purpose of the aperture ratio of the first test aperture being equal to the aperture ratio of the first display aperture is: in order to minimize the difference between the thickness of the first test filter layer and the thickness of the first display filter layer. The difference between the thickness of the first test filter layer and the thickness of the first display filter layer is small, so that the difference between the actual chromaticity of the first test filter layer and the actual chromaticity of the first display filter layer is small or even equal. The first test filter layer is used to characterize a chromaticity of the first display filter layer. The first test filter layer includes a first test area and a second test area, the first test area has a first minimum width and a first maximum width along the first feature width direction, the second test area has a second minimum width and a second maximum width along the first feature width direction, the second minimum width is greater than or equal to the first maximum width, and the second maximum width is greater than the first maximum width, so that an average width of the second test area along the first feature width direction is greater than an average width of the first test area along the first feature width direction, so that a projection pattern of a spot of incident light used by the optical colorimetry method on the first test filter layer is completely located within the first test filter layer, so that a difference between a chromaticity of the first test filter layer obtained by the optical colorimetry method and an actual chromaticity of the first test filter layer is small, so that accuracy of the chromaticity of the first test filter layer obtained by the optical colorimetry method is high, and further the chromaticity of the first display filter layer is accurately characterized. Therefore, the performance of the color filter substrate is improved.
Drawings
FIG. 1 is a schematic diagram of a test pattern in a color filter substrate;
FIG. 2 is a schematic diagram of a test pattern in another color filter substrate;
fig. 3 to 7 are schematic structural diagrams of a color filter substrate according to an embodiment of the invention;
fig. 8 is a schematic structural diagram of a color filter substrate according to another embodiment of the invention.
Detailed Description
As described in the background, the prior art color filter substrate has poor performance.
The color filter substrate includes: a light-transmitting substrate including a display region and a non-display region surrounding the display region; a first light-shielding pattern layer on the display region, the first light-shielding pattern layer having a display opening therein; and the display filter layer covers the display opening.
With the improvement of the resolution of the color filter substrate, the size of the display opening is smaller and smaller, and correspondingly, the size of the display filter layer is smaller and smaller. The minimum dimension of the light spot for chromaticity measurement has a certain size, for example, the diameter of the light spot is 20 micrometers, and when the width of the display opening is less than 20 micrometers, the chromaticity of the display filter layer is not accurately measured directly.
To this end, it is proposed to provide a test structure on the non-display area (refer to fig. 1), the test structure comprising: a second light-shielding pattern layer 100 on the non-display region, the second light-shielding pattern layer 100 having a non-display opening therein; a test filter layer 110 covering the non-display opening. The test filter layer 110 and the display filter layer with the same color are formed in the same photolithography process, specifically, the photoresist is deposited on the display area and the non-display area simultaneously, the photoresist on the display area and the non-display area is exposed simultaneously, and the photoresist on the display area and the non-display area is developed simultaneously. The chromaticity of the display filter layer is characterized by measuring the chromaticity of the test filter layer 110, specifically, the measured chromaticity value is obtained by measuring the chromaticity of the test filter layer 110, and the measured chromaticity value is used as the chromaticity of the display filter layer.
The edge of the second display opening has a rectangular shape when the pattern is projected on the transparent substrate, and the test filter layer 110 has a rectangular shape when the pattern is projected on the transparent substrate.
The size of the non-display opening is larger than the size of the display opening, that is, the line width of the second light-shielding pattern layer is decreased to increase the size of the non-display opening, so that the size of the test filter layer 110 is larger, the difference between the value of the chromaticity measurement of the test filter layer 110 and the actual chromaticity of the test filter layer 110 is smaller, and the accuracy of the chromaticity measurement of the test filter layer 110 is improved. However, the aperture ratio of the non-display opening is not consistent with the aperture ratio of the display opening, and thus, the difference between the actual chromaticity of the test filter layer 110 and the actual chromaticity of the display filter layer is large due to the leveling property of the photoresist, and the chromaticity of the test filter layer cannot represent the chromaticity of the display filter layer.
The other method is as follows: referring to fig. 2, the non-display opening is in the width direction, the line width of the second light-shielding pattern layer 120 is removed, and the test filter layers 130 are adjacent to each other, so that the size of the test filter layer 130 is larger, the difference between the value of the chromaticity measurement of the test filter layer 130 and the actual chromaticity of the test filter layer 110 is smaller, and the accuracy of the chromaticity measurement of the test filter layer 110 is improved. However, the aperture ratio of the non-display opening is not consistent with the aperture ratio of the display opening, and thus, the difference between the actual chromaticity of the test filter layer 110 and the actual chromaticity of the display filter layer is large due to the leveling property of the photoresist, and the chromaticity of the test filter layer cannot represent the chromaticity of the display filter layer.
Therefore, it is desirable to improve the accuracy of the chromaticity characterization of the display filter layer by the test filter layer 110 when the aperture ratio of the non-display opening is consistent with the aperture ratio of the display opening.
On this basis, the present invention provides a color filter substrate, comprising: a test structure, the test structure comprising: the second shading pattern layer is provided with a second opening group, the second opening group comprises a first test opening, and the aperture opening rates of the first test opening and the first display opening are the same; the second filtering layer group comprises a first testing filtering layer, and the first testing filtering layer covers the first testing opening; the first test filter layer is provided with a first characteristic width direction, the first test filter layer is divided into a first test area and a second test area along the direction perpendicular to the first characteristic width direction, the first test area is provided with a first minimum width and a first maximum width along the first characteristic width direction, the second test area is provided with a second minimum width and a second maximum width along the first characteristic width direction, the second minimum width is larger than or equal to the first maximum width, and the second maximum width is larger than the first maximum width. The performance of the color filter substrate is improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 3, fig. 3 illustrates a color filter substrate as a whole. The whole color filter substrate includes a plurality of display regions a and a non-display region B surrounding each display region a according to the size of the finally cut display panel. The present invention is improved in that the shape of the test structure TEG in the non-display area B is improved. The test structure TEG is used to characterize the chromaticity of the first filter layer group.
Referring to fig. 4, fig. 5, fig. 6 and fig. 7, fig. 4 is a schematic cross-sectional view taken along a cutting line a-a1 in fig. 3, fig. 5 is a schematic cross-sectional view taken along a cutting line b-b1 in fig. 3, fig. 6 is a top view of fig. 4, and fig. 7 is a top view of fig. 5, including:
a light-transmitting substrate 200, the light-transmitting substrate 200 including a display region a and a non-display region B surrounding the display region 200;
a first light-shielding pattern layer 210 on the display region a of the transparent substrate 200, the first light-shielding pattern layer 210 having a first set of openings therein, the first set of openings including a first display opening;
a first filter layer group located on the display area a of the transparent substrate 200, the first filter layer group including a first display filter layer 221, the first display filter layer 221 covering the first display opening;
a test structure on the non-display region B of the light-transmitting substrate 200, the test structure comprising: a second light-shielding pattern layer 230, wherein the second light-shielding pattern layer 230 has a second opening group, the second opening group includes a first test opening, and an aperture ratio of the first test opening is equal to an aperture ratio of the first display opening; a second filter layer group including a first test filter layer 241, the first test filter layer 241 and the first display filter layer 221 having the same color, the first test filter layer 241 covering the first test opening;
the first test filter layer 241 has a first characteristic width direction X, the first test filter layer 241 is divided into a first test region 241a and a second test region 241b along a direction perpendicular to the first characteristic width direction X, the second test region 241b is adjacent to the first test region 241a, the first test region 241a has a first minimum width W11 and a first maximum width W12 along the first characteristic width direction X, the second test region 241b has a second minimum width W21 and a second maximum width W22 along the first characteristic width direction X, the second minimum width W21 is equal to or greater than the first maximum width W12, and the second maximum width W22 is greater than the first maximum width W12.
The first aperture group further includes a second display aperture and a third display aperture. The first display opening, the second display opening, and the third display opening are discrete from one another.
The second opening group further comprises a second testing opening and a third testing opening, and the first testing opening, the second testing opening and the third testing opening are mutually separated.
The aperture ratio of the first test aperture is equal to the aperture ratio of the first display aperture, the aperture ratio of the second test aperture is equal to the aperture ratio of the second display aperture, and the aperture ratio of the third test aperture is equal to the aperture ratio of the third display aperture. The first test opening, the second test opening and the third test opening are identical in shape and size. The first display opening, the second display opening and the third display opening are the same in shape and size.
The first display opening and the first test opening have the same shape, or the first display opening and the first test opening have different shapes. The second display opening and the second test opening are the same in shape, or the second display opening and the second test opening are different in shape. The third display opening and the third test opening have the same shape, or the third display opening and the third test opening have different shapes.
In the present embodiment, the area of the projected pattern of each first test opening on the surface of the transparent substrate 200 is equal to the area of the projected pattern of each first display opening on the surface of the transparent substrate 200; the area of the projected pattern of each second test opening on the surface of the transparent substrate 200 is equal to the area of the projected pattern of each second display opening on the surface of the transparent substrate 200; the area of the projected pattern of each third test opening on the surface of the transparent substrate 200 is equal to the area of the projected pattern of each third display opening on the surface of the transparent substrate 200.
The first filter layer group further includes: the second display filter layer 222 and the third display filter layer 223, the second display filter layer 222, the third display filter layer 223, and the first display filter layer 221 are different in color from each other; the second display filter layer 222 covers the second display opening; the third display filter layer 223 covers the third display opening.
The second filter layer group further includes: a second test filter layer 242, the second test filter layer 242 and the second display filter layer 222 having the same color, the second test filter layer 242 being located in the second test opening; the third test filter layer 243, the third test filter layer 243 and the third display filter layer 223 have the same color, and the third test filter layer 243 is located in the third test opening.
The first test filter layer 241 and the first display filter layer 221 are formed using the same mask, and the first test filter layer 241 and the first display filter layer 221 are formed in the same photolithography process. The second test filter layer 242 and the second display filter layer 222 are formed using the same mask, and the second test filter layer 242 and the second display filter layer 222 are formed in the same photolithography process. The third test filter layer 243 and the third display filter layer 223 are formed using the same mask, and the third test filter layer 243 and the third display filter layer 223 are formed in the same photolithography process.
The colors of the first display filter layer 221, the second display filter layer 222, and the third display filter layer 223 are any one of red, blue, and green, and the colors of the first display filter layer 221, the second display filter layer 222, and the third display filter layer 223 are different from each other.
The first, second, and third test filter layers 241, 242, and 243 have any one of colors of red, blue, and green, and the colors of the first, second, and third test filter layers 241, 242, and 243 are different from each other.
The first display filter layer 221, the second display filter layer 222, and the third display filter layer 223 have the same shape and the same size. The first test filter layer 241, the second test filter layer 242, and the third test filter layer 243 have the same shape and the same size.
In this embodiment, a description is given taking as an example that the shapes of the first display filter layer 221, the second display filter layer 222, and the third display filter layer 223 are rectangles. In other embodiments, the first display filter layer, the second display filter layer, and the third display filter layer are shaped as triangles. Alternatively, the first, second, and third display filter layers 221, 222, and 223 refer to the shapes of the first, second, and third test filter layers 241, 242, and 243.
In this embodiment, description about the shapes of the first display filter layer 221, the second display filter layer 222, and the third display filter layer 223 refers to: the first display filter layer 221, the second display filter layer 222, and the third display filter layer 223 have shapes of projected patterns on the surface of the light-transmitting substrate 200, respectively.
The second test filter layer 242 has a second characteristic width direction, the second test filter layer 242 is divided into a third test area 242a and a fourth test area 242b along a direction perpendicular to the second characteristic width direction, the fourth test area 242b is adjacent to the third test area 242a, the third test area 242a has a third minimum width and a third maximum width along the second characteristic width direction, the fourth test area 242b has a fourth minimum width and a fourth maximum width along the second characteristic width direction, the fourth minimum width is equal to or greater than the third maximum width, and the fourth maximum width is greater than the third maximum width.
The third test filter layer 243 has a third characteristic width direction, the third test filter layer 243 is divided into a fifth test zone 243a and a sixth test zone 243b along a direction perpendicular to the third characteristic width direction, the sixth test zone 243b is adjacent to the fifth test zone 243a, the fifth test zone 243a has a fifth minimum width and a fifth maximum width along the third characteristic width direction, the sixth test zone 243b has a sixth minimum width and a sixth maximum width along the third characteristic width direction, the sixth minimum width is equal to or greater than the fifth maximum width, and the sixth maximum width is greater than the fifth maximum width.
In this embodiment, the first test filter layer 241 has a first projection pattern on the surface of the transparent substrate, the first projection pattern is trapezoidal, and the first characteristic width direction X is perpendicular to the height direction of the first projection pattern and parallel to the surface of the transparent substrate. In the trapezoid in which the first projected pattern is located, the height of the trapezoid is larger than the bottom and top edges of the trapezoid. Correspondingly, the second test filter layer 242 has a second projection pattern on the surface of the light-transmitting substrate, the third test filter layer has a third projection pattern on the surface of the light-transmitting substrate, the second projection pattern is trapezoidal, the second characteristic width direction is perpendicular to the height direction of the second projection pattern and parallel to the surface of the light-transmitting substrate, the third projection pattern is trapezoidal, and the third characteristic width direction is perpendicular to the height direction of the third projection pattern and parallel to the surface of the light-transmitting substrate. In the trapezoid in which the second projected pattern is located, the height of the trapezoid is larger than the bottom edge and the top edge of the trapezoid. In the trapezoid in which the third projected pattern is located, the height of the trapezoid is larger than the bottom edge and the top edge of the trapezoid.
In the trapezoid in which the first projection pattern is located, the trapezoid is a right-angled trapezoid, an isosceles trapezoid, or a general trapezoid. In the trapezoid in which the second projection pattern is located, the trapezoid is a right-angled trapezoid, an isosceles trapezoid, or a general trapezoid. In the trapezoid in which the third projection pattern is located, the trapezoid is a right-angled trapezoid, an isosceles trapezoid, or a general trapezoid.
In the present embodiment, the trapezoid in the first projection pattern is exemplified as a right-angled trapezoid, the trapezoid in the second projection pattern is exemplified as a right-angled trapezoid, and the trapezoid in the third projection pattern is exemplified as a right-angled trapezoid.
In this embodiment, the description about the shapes of the first test filter layer 241, the second test filter layer 242, and the third test filter layer 243 all means: the first test filter layer 241, the second test filter layer 242, and the third test filter layer 243 have shapes of projected patterns on the surface of the light-transmitting substrate 200, respectively.
Note that the first test filter layer 241 and the first display filter layer 221 have the same or different shapes, the second test filter layer 242 and the second display filter layer 222 have the same or different shapes, and the third test filter layer 243 and the third display filter layer 223 have the same or different shapes.
In this embodiment, the third characteristic width direction, the second characteristic width direction, and the first characteristic width direction are parallel; and a first test filter layer, a second test filter layer and a third test filter layer in the second filter layer group are arranged along the direction parallel to the width direction of the first characteristic. In other embodiments, the third feature width direction, the second feature width direction, and the first feature width direction may be selected to be non-parallel. The first test filter layer, the second test filter layer and the third test filter layer may also select other arrangement modes.
The thickness of the first test filter layer 241 is equal to the thickness of the first display filter layer 221. The thickness of the second test filter layer 242 is equal to the thickness of the second display filter layer 222; the thickness of the third test filter layer 243 is equal to the thickness of the third display filter layer 223.
The first projection pattern has a first maximum inscribed circle with a diameter in the range of 10 micrometers to 30 micrometers, and preferably, the first maximum inscribed circle has a diameter in the range of 10 micrometers to 20 micrometers. The second projection pattern has a second largest inscribed circle with a diameter in the range of 10 micrometers to 30 micrometers, and preferably, the second largest inscribed circle has a diameter in the range of 10 micrometers to 20 micrometers. The third projected pattern has a third largest inscribed circle having a diameter in the range of 10 micrometers to 30 micrometers, and preferably, the third largest inscribed circle has a diameter in the range of 10 micrometers to 20 micrometers.
In this embodiment, any one of the second opening groups includes two first test openings, two second test openings, and two third test openings, and any one of the second filter layer groups includes two first test filter layers, two second test filter layers, and two third test filter layers.
For convenience of description, in any one second filter layer group, two first test filter layers are respectively a first position test filter layer and a fourth position test filter layer, two second test filter layers are respectively a second position test filter layer and a fifth position test filter layer, and two third test filter layers are respectively a third position test filter layer and a sixth position test filter layer; the first position test filter layer to the sixth position test filter layer are sequentially arranged along the first characteristic width direction, and the first position test filter layer and the fourth position test filter layer are centrosymmetric; the second position test filter layer and the fifth position test filter layer are centrosymmetric, and the third position test filter layer and the sixth position test filter layer are centrosymmetric; the first position test filter layer and the second position test filter layer are centrosymmetric, and the second position test filter layer and the third position test filter layer are centrosymmetric; the fifth position test filter layer and the fourth position test filter layer are centrosymmetric; the sixth position test filter layer and the fifth position test filter layer are centrosymmetric. Such benefits include: the uniformity of red light transmission is improved, the uniformity of blue light transmission is improved, the uniformity of green light transmission is improved, and the uniformity of picture color is improved.
In other embodiments, any one of the second opening sets includes a first test opening, a second test opening, and a third test opening, and any one of the second filter layer sets includes a first test filter layer, a second test filter layer, and a third test filter layer.
Another embodiment of the present invention further provides a color filter substrate, which is different from the previous embodiment in that: the first test filter layer, the second test filter layer, and the third test filter layer of this embodiment are different in shape from the first test filter layer, the second test filter layer, and the third test filter layer of the previous embodiment. The same parts of this embodiment as those of the previous embodiment will not be described in detail.
The color filter substrate provided in this embodiment, with reference to fig. 8, includes: a light-transmissive substrate including a display region and a non-display region B surrounding the display region; and the test structure is positioned on the non-display area B of the light-transmitting substrate. The structure of the display region of the transparent substrate is the same as that of the previous embodiment, and is not described in detail. The structure of the non-display region of the transparent substrate 200 is mainly described in detail in this embodiment.
Referring collectively to fig. 8, the test structure includes: a second light-shielding pattern layer 330, wherein the second light-shielding pattern layer 330 has a second opening group, the second opening group includes a first test opening, a second test opening and a third test opening, the aperture ratio of the first test opening is equal to the aperture ratio of the first display opening, the aperture ratio of the second test opening is equal to the aperture ratio of the second display opening, and the aperture ratio of the third test opening is equal to the aperture ratio of the third display opening; a second set of filter layers.
The second filter layer group includes a first test filter layer 341, a second test filter layer 342, and a third test filter layer 343, the first test filter layer 341 and the first display filter layer have the same color, the first test filter layer 341 covers the first test opening, the second test filter layer 342 and the second display filter layer have the same color, the second test filter layer 342 covers the second test opening, the third test filter layer 343 and the third display filter layer have the same color, and the third test filter layer 343 covers the third test opening.
The first test filter layer 341 has a first characteristic width direction, the first test filter layer 341 is divided into a first test region 341a and a second test region 341b along a direction perpendicular to the first characteristic width direction, the second test region 341b is adjacent to the first test region 341a, the first test region 341a has a first minimum width and a first maximum width along the first characteristic width direction, the second test region 341b has a second minimum width and a second maximum width along the first characteristic width direction, the second minimum width is greater than or equal to the first maximum width, and the second maximum width is greater than the first maximum width.
In this embodiment, the first minimum width and the first maximum width are equal and are both W31. The second minimum width and the second maximum width are equal and are both W41.
The second test filter layer 342 has a second characteristic width direction, the second test filter layer 342 is divided into a third test zone 342a and a fourth test zone 342b along a direction perpendicular to the second characteristic width direction, the fourth test zone 342b is adjacent to the third test zone 342a, the third test zone 342a has a third minimum width and a third maximum width along the second characteristic width direction, the fourth test zone 342b has a fourth minimum width and a fourth maximum width along the second characteristic width direction, the fourth minimum width is equal to or greater than the third maximum width, and the fourth maximum width is greater than the third maximum width.
In this embodiment, the third minimum width is equal to the third maximum width, and the fourth minimum width is equal to the fourth maximum width.
The third test filter layer 343 has a third feature width direction, the third test filter layer 343 is divided into a fifth test zone 343a and a sixth test zone 343b along a direction perpendicular to the third feature width direction, the sixth test zone 343b is adjacent to the fifth test zone 343a, the fifth test zone 343a has a fifth minimum width and a fifth maximum width along the third feature width direction, the sixth test zone 343b has a sixth minimum width and a sixth maximum width along the third feature width direction, the sixth minimum width is equal to or greater than the fifth maximum width, and the sixth maximum width is greater than the fifth maximum width.
In this embodiment, the fifth minimum width and the fifth maximum width are equal, and the sixth minimum width and the sixth maximum width are equal.
In this embodiment, the position arrangement of the first test filter layer 341, the second test filter layer 342, and the third test filter layer 343 in the second filter layer group is as described in the foregoing embodiments.
The colors of the first test filter layer 341, the second test filter layer 342, and the third test filter layer 343 refer to the contents of the foregoing embodiments and are not described in detail.
In this embodiment, the first test filter layer 341 has a first projection pattern on the surface of the transparent substrate, and the first projection pattern is "L" shaped; the first test region 341a has a rectangular shape in a projection pattern on the surface of the transparent substrate, and the second test region 341b has a rectangular shape in a projection pattern on the surface of the transparent substrate.
In this embodiment, the second test filter layer 342 has a second projected pattern on the surface of the transparent substrate, the second projected pattern is in an "L" shape, the third test area 342a has a rectangular projected pattern on the surface of the transparent substrate, and the fourth test area 342b has a rectangular projected pattern on the surface of the transparent substrate.
In this embodiment, the third test filter layer 343 has a third projection pattern on the surface of the transparent substrate, the third projection pattern is "L" shaped, the projection pattern of the fifth test area 343a on the surface of the transparent substrate is rectangular, and the projection pattern of the sixth test area 343b on the surface of the transparent substrate is rectangular.
The thickness of the first test filter layer 341 is equal to the thickness of the first display filter layer. The thickness of the second test filter layer 342 is equal to the thickness of the second display filter layer; the thickness of the third test filter layer 343 is equal to the thickness of the third display filter layer.
The first projected pattern has a first maximum inscribed circle having a diameter in the range of 10 micrometers to 30 micrometers, and preferably, the first maximum inscribed circle has a diameter in the range of 10 micrometers to 20 micrometers. The second projection pattern has a second largest inscribed circle with a diameter in the range of 10 micrometers to 30 micrometers, and preferably, the second largest inscribed circle has a diameter in the range of 10 micrometers to 20 micrometers. The third projected pattern has a third largest inscribed circle having a diameter in the range of 10 micrometers to 30 micrometers, and preferably, the third largest inscribed circle has a diameter in the range of 10 micrometers to 20 micrometers.
Another embodiment of the present invention further provides a chromaticity measuring method, including: providing the color filter substrate; and acquiring first chromaticity information of the first test filter layer by adopting an optical chromaticity measurement method, wherein a projection pattern of a light spot of incident light adopted by the optical chromaticity measurement method on the surface of the first test filter layer is positioned in the first test filter layer.
Specifically, in the process of testing the first colorimetric information, the projection pattern of the light spot of the incident light adopted by the optical colorimetric measurement method on the surface of the first test filter layer is located in the second test area.
The colorimetric measurement method further includes: and acquiring second chromaticity information of the second test filter layer by adopting an optical chromaticity measurement method, wherein a projection pattern of a light spot of incident light adopted by the optical chromaticity measurement method on the surface of the second test filter layer is positioned in the second test filter layer.
Specifically, in the process of testing the second chromaticity information, the projection pattern of the light spot of the incident light adopted by the optical chromaticity measurement method on the surface of the second test filter layer is located in the fourth test area.
The colorimetric measurement method further includes: and acquiring third chromaticity information of the third test filter layer by adopting an optical chromaticity measuring method, wherein the projection pattern of the light spot of the incident light adopted by the optical chromaticity measuring method on the surface of the third test filter layer is positioned in the third test filter layer.
Specifically, in the process of testing the third chromaticity information, the projection pattern of the light spot of the incident light adopted by the optical chromaticity measurement method on the surface of the third test filter layer is located in the sixth test area.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. A color filter substrate, comprising:
a light-transmitting substrate including a display region and a non-display region surrounding the display region;
the first shading pattern layer is positioned on the display area of the light-transmitting substrate, and a first opening group is arranged in the first shading pattern layer and comprises a first display opening;
the first filtering layer group is positioned on the display area of the light-transmitting substrate and comprises a first display filtering layer, and the first display filtering layer covers the first display opening;
a test structure on a non-display area of a transparent substrate, the test structure comprising: the second shading pattern layer is provided with a second opening group, the second opening group comprises a first testing opening, and the opening rate of the first testing opening is equal to that of the first display opening; the second filtering layer group comprises a first testing filtering layer, the color of the first testing filtering layer is the same as that of the first display filtering layer, and the first testing filtering layer covers the first testing opening;
the first test filter layer is provided with a first characteristic width direction, the first test filter layer is divided into a first test area and a second test area along the direction vertical to the first characteristic width direction, the second test area is adjacent to the first test area, the first test area is provided with a first minimum width and a first maximum width along the first characteristic width direction, the second test area is provided with a second minimum width and a second maximum width along the first characteristic width direction, the second minimum width is greater than or equal to the first maximum width, and the second maximum width is greater than the first maximum width;
the first test filter layer is provided with a first projection pattern on the surface of the light-transmitting substrate, the first projection pattern is provided with a first maximum inscribed circle, and the diameter range of the first maximum inscribed circle is 10-30 micrometers.
2. The color filter substrate according to claim 1, wherein the first test filter layer has a first projected pattern on the surface of the transparent substrate, and the first projected pattern has a trapezoid shape; the first characteristic width direction is perpendicular to the height direction of the first projection pattern and parallel to the surface of the light-transmitting substrate.
3. The color filter substrate according to claim 1, wherein the first test filter layer has a first projected pattern on the surface of the light-transmitting substrate, the first projected pattern having an "L" shape; the shape of the projection pattern of the first test area on the surface of the light-transmitting substrate is rectangular, and the shape of the projection pattern of the second test area on the surface of the light-transmitting substrate is rectangular.
4. The color filter substrate of claim 1, wherein the first test filter layer has a thickness equal to a thickness of the first display filter layer.
5. The color filter substrate of claim 1, wherein the first display opening and the first test opening are the same shape, or the first display opening and the first test opening are different shapes.
6. The color filter substrate of claim 1, wherein the first set of openings further comprises a second display opening and a third display opening; the first set of filter layers further includes: the colors of the second display filter layer, the third display filter layer and the first display filter layer are different; the second display filter layer covers the second display opening; the third display filter layer covers the third display opening;
the second opening group further comprises a second test opening and a third test opening, the aperture ratio of the second test opening is equal to the aperture ratio of the second display opening, and the aperture ratio of the third test opening is equal to the aperture ratio of the third display opening;
the second filter layer group further includes: the color of the second test filter layer is the same as that of the second display filter layer, and the second test filter layer is positioned in the second test opening; the third test filter layer has the same color as the third display filter layer and is positioned in the third test opening;
the second test filter layer is provided with a second characteristic width direction, the second test filter layer is divided into a third test area and a fourth test area along the direction vertical to the second characteristic width direction, the fourth test area is adjacent to the third test area, the third test area is provided with a third minimum width and a third maximum width along the second characteristic width direction, the fourth test area is provided with a fourth minimum width and a fourth maximum width along the second characteristic width direction, the fourth minimum width is greater than or equal to the third maximum width, and the fourth maximum width is greater than the third maximum width;
the third test filter layer has a third feature width direction, the third test filter layer is divided into a fifth test area and a sixth test area along a direction perpendicular to the third feature width direction, the sixth test area is adjacent to the fifth test area, the fifth test area has a fifth minimum width and a fifth maximum width along the third feature width direction, the sixth test area has a sixth minimum width and a sixth maximum width along the third feature width direction, the sixth minimum width is greater than or equal to the fifth maximum width, and the sixth maximum width is greater than the fifth maximum width.
7. The color filter substrate according to claim 6, wherein the second test filter layer has a second projected pattern on the surface of the light-transmitting substrate, and the third test filter layer has a third projected pattern on the surface of the light-transmitting substrate;
the second projection pattern is trapezoidal in shape, the second characteristic width direction is perpendicular to the height direction of the second projection pattern and parallel to the surface of the light-transmitting substrate, the third projection pattern is trapezoidal in shape, and the third characteristic width direction is perpendicular to the height direction of the third projection pattern and parallel to the surface of the light-transmitting substrate;
or the second projection pattern is in an L shape, the projection pattern of the third test area on the surface of the light-transmitting substrate is in a rectangular shape, the projection pattern of the fourth test area on the surface of the light-transmitting substrate is in a rectangular shape, the third projection pattern is in an L shape, the projection pattern of the fifth test area on the surface of the light-transmitting substrate is in a rectangular shape, and the projection pattern of the sixth test area on the surface of the light-transmitting substrate is in a rectangular shape.
8. The color filter substrate according to claim 6, wherein the second display opening and the second test opening have the same or different shapes; the third display opening and the third test opening are the same or different in shape; the first display opening, the second display opening and the third display opening are the same in shape and size; the first test opening, the second test opening and the third test opening are identical in shape and size.
9. The color filter substrate according to claim 6, wherein a thickness of the second test filter layer is equal to a thickness of the second display filter layer; the thickness of the third test filter layer is equal to the thickness of the third display filter layer.
10. The color filter substrate according to claim 6, wherein the second test filter layer has a second projected pattern on the surface of the transparent substrate, the second projected pattern having a second maximum inscribed circle therein, the diameter of the second maximum inscribed circle being in the range of 10 micrometers to 30 micrometers;
the third test filter layer is provided with a third projection graph on the surface of the light-transmitting substrate, the third projection graph is provided with a third maximum inscribed circle, and the diameter range of the third maximum inscribed circle is 10-30 micrometers.
11. The color filter substrate according to claim 6, wherein the third feature width direction, the second feature width direction, and the first feature width direction are parallel; and the first test filter layer, the second test filter layer and the third test filter layer in the second filter layer group are arranged along the direction parallel to the width direction of the first characteristic.
12. The color filter substrate according to claim 11, wherein any one of the second aperture sets comprises two first test apertures, two second test apertures, and two third test apertures; any one second filter layer group comprises two first test filter layers, two second test filter layers and two third test filter layers; the two first test filter layers are respectively a first position test filter layer and a fourth position test filter layer, the two second test filter layers are respectively a second position test filter layer and a fifth position test filter layer, and the two third test filter layers are respectively a third position test filter layer and a sixth position test filter layer; the first position test filter layer to the sixth position test filter layer are sequentially arranged along the first characteristic width direction, and the first position test filter layer and the fourth position test filter layer are centrosymmetric; the second position test filter layer and the fifth position test filter layer are centrosymmetric, and the third position test filter layer and the sixth position test filter layer are centrosymmetric; the first position test filter layer and the second position test filter layer are centrosymmetric, and the second position test filter layer and the third position test filter layer are centrosymmetric; the fifth position test filter layer and the fourth position test filter layer are centrosymmetric; the sixth position test filter layer and the fifth position test filter layer are centrosymmetric.
13. A colorimetric measurement method comprising:
providing a color filter substrate according to any of claims 1 to 12;
and acquiring first chromaticity information of the first test filter layer by adopting an optical chromaticity measurement method, wherein a projection pattern of a light spot of incident light adopted by the optical chromaticity measurement method on the surface of the first test filter layer is positioned in the first test filter layer.
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