CN110275341B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN110275341B CN110275341B CN201910580319.9A CN201910580319A CN110275341B CN 110275341 B CN110275341 B CN 110275341B CN 201910580319 A CN201910580319 A CN 201910580319A CN 110275341 B CN110275341 B CN 110275341B
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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
- G02F1/13338—Input devices, e.g. touch panels
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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
- 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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
Abstract
The present invention provides a display panel and a display device, the display panel including: the color film substrate and the array substrate are oppositely arranged; a light sensing unit located on the array substrate; the first light blocking layer is positioned on one side, close to the array substrate, of the color film substrate, and the second light blocking layer is positioned on one side, close to the array substrate, of the first light blocking layer; the first color pixel unit is positioned between the color film substrate and the array substrate and comprises a first color resistor and a second color resistor; the first light-blocking layer includes a first opening portion and a second opening portion, and the second light-blocking layer includes a third opening portion and a fourth opening portion; the first color resistance is positioned at the second opening part and the fourth opening part; the second color resistance is positioned between the first light-blocking layer and the second light-blocking layer; the second color resistor is provided with a fifth opening, and the orthographic projections of the first opening, the third opening, the fifth opening and the light sensing unit on the color film substrate are overlapped. The invention can improve the sensitivity of fingerprint identification of the display panel and the display device.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
Fingerprints are inherent to everyone, and with the development of science and technology, a variety of display devices with fingerprint identification functions, such as mobile phones, tablet computers, intelligent wearable devices and the like, appear in the market. Before a user operates the display device with the fingerprint identification function, the user can carry out authority verification only by touching the display device with a finger, and the authority verification process is simplified. In addition, with the increase of fingerprint identification application scenes, the demand on fingerprint identification sensitivity is gradually increased. However, in the prior art, the sensitivity of fingerprint recognition is low.
[ summary of the invention ]
In order to solve the above technical problems, the present invention provides a display panel and a display device.
In a first aspect, the present invention provides a display panel comprising:
the color film substrate and the array substrate are oppositely arranged;
the light sensing unit is positioned on one side of the array substrate close to the color film substrate;
the color filter substrate comprises a first light-blocking layer and a second light-blocking layer, wherein the first light-blocking layer is positioned on one side, close to the array substrate, of the color filter substrate, and the second light-blocking layer is positioned on one side, close to the array substrate, of the first light-blocking layer;
the first color pixel units are positioned between the color film substrate and the array substrate and comprise two first color resistors and a second color resistor, and the first color is different from the second color;
in one of the first color pixel units, the first light-blocking layer includes a first opening portion and a second opening portion, and the second light-blocking layer includes a third opening portion and a fourth opening portion; the two first color resistors are respectively positioned at the second opening part and the fourth opening part; the second color resist is positioned between the first light-blocking layer and the second light-blocking layer; the second color resistor is provided with a fifth opening, and orthographic projections of the first opening, the third opening, the fifth opening and the light sensing unit on the color film substrate are overlapped.
Optionally, a thickness of the second color resist is greater than a thickness of the first light-blocking layer and greater than a thickness of the second light-blocking layer.
Optionally, the second color resist continuously surrounds the fifth opening.
Optionally, the first color pixel unit further includes a third color resistor, and colors of the first color resistor, the second color resistor, and the third color resistor are different from each other;
the third color resistor is arranged on one side, close to the array substrate, of the second color resistor, and the third color resistor comprises a sixth opening;
orthographic projections of the first opening part, the third opening part, the fifth opening part, the sixth opening part and the light sensing unit on the color film substrate are overlapped;
the correspondingly arranged second color resistor is in contact with the third color resistor, the second color resistor is also in contact with the first light blocking layer, and the third color resistor is also in contact with the second light blocking layer.
Optionally, the third color resist continuously surrounds the sixth opening.
Optionally, orthographic projections of the first opening portion, the third opening portion, and the fifth opening portion on the color filter substrate are overlapped.
Optionally, the thickness of the second color resist is greater than 20 microns.
Optionally, the first opening portion, the third opening portion, and the fifth opening portion constitute a collimating through hole, and a distance between an upper end and a lower end of the collimating through hole is greater than 25 micrometers.
Optionally, orthographic projections of the two first color resists on the color film substrate are overlapped.
Optionally, orthographic projections of the first color resistor and the second color resistor on the color film substrate are not overlapped.
Optionally, an orthographic projection of the first light-blocking layer on the color film substrate coincides with an orthographic projection of the second light-blocking layer on the color film substrate.
Optionally, an orthographic projection of the first light-blocking layer on the color film substrate, an orthographic projection of the second color barrier on the color film substrate, and an orthographic projection of the second light-blocking layer on the color film substrate coincide.
In a second aspect, the present invention provides a display device comprising the display panel.
In the present invention, the display panel is used for a liquid crystal display device. And a liquid crystal layer is arranged between the color film substrate and the array substrate and is emitted out through the liquid crystal layer. In one first color pixel unit, the first light-blocking layer is located on one side of the color film substrate close to the array substrate, and the second light-blocking layer is located on one side of the first light-blocking layer close to the array substrate. The first light-blocking layer and the second light-blocking layer are formed by two patterning processes. The two first color resists are respectively positioned at the second opening part of the first light blocking layer and the fourth opening part of the second light blocking layer. The non-opening portions of the first light-blocking layer and the second light-blocking layer block light, and the second opening portion of the first light-blocking layer and the fourth opening portion of the second light-blocking layer transmit light. The two layers of first color resistors are respectively positioned at the second opening part and the fourth opening part. The first color resistance unit further comprises a second color resistance, and the second color resistance is positioned between the first light blocking layer and the second light blocking layer; the second color resistor is provided with a fifth opening part. The light sensing unit is positioned on one side of the array substrate close to the color film substrate. When a finger is positioned on the liquid crystal display device, the light emitted by the first color pixel unit is reflected at the finger, and the light sensing unit receives and detects the light reflected by the finger so as to perform fingerprint identification. The first color resistor and the second color resistor block stray light above and below one side of the first color resistor from entering the light sensing unit together. The stray light above one side of the first color resistor is firstly changed into light of the first color through the first color resistor of the second opening part and then reaches the second color resistor, and the light of the first color is filtered. Stray light below one side of the first color resistor is changed into light of the first color through the first color resistor of the fourth opening part, and then reaches the second color resistor, and the light of the first color is filtered. Meanwhile, a first opening part of the first light blocking layer, a third opening part of the second light blocking layer, a fifth opening part of the second color resistance and an orthographic projection of the light sensation unit on the color film substrate are overlapped. Therefore, the light reflected by the finger reaches the light sensing unit straightly, and the signal-to-noise ratio of the light sensing unit and the sensitivity of fingerprint identification are improved. The signal-to-noise ratio of the light sensing unit and the sensitivity of fingerprint identification are further improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, 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 structural diagram of a display panel 100 in the prior art;
FIG. 2 is a schematic structural diagram of a display panel 200 according to an embodiment of the invention;
FIG. 3 is a corresponding schematic view of FIG. 2;
FIG. 4 is a cross-sectional view of the second color resistor 270 of the display panel 200 along a plane parallel to the display panel according to the embodiment of the present invention;
FIG. 5 is a schematic view of another structure of a display panel 200 according to an embodiment of the invention;
FIG. 6 is a schematic view of the corresponding structure of FIG. 5; (ii) a
FIG. 7 is a cross-sectional view of the third color filter 280 of the display panel 200 taken parallel to the plane of the display panel according to the present invention;
fig. 8 is a schematic structural diagram of a display device 300 according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, 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 invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used herein to describe devices in accordance with embodiments of the present invention, these devices should not be limited by these terms. These terms are only used to distinguish one device from another. For example, a first device may also be referred to as a second device, and similarly, a second device may also be referred to as a first device, without departing from the scope of embodiments of the present invention.
Fig. 1 is a schematic structural diagram of a display panel 100 in the prior art.
As shown in fig. 1, in the prior art, a display panel 100 includes an array substrate 110, a color film substrate 120, a light sensing unit 130, a first light-blocking layer 140, a second light-blocking layer 150, and a third light-blocking layer 160. The first light-blocking layer 140 is provided with a first opening 141, the second light-blocking layer 150 is provided with a second opening 151, and the third light-blocking layer 160 is provided with a third opening 161. The first opening 141, the second opening 151, and the third opening 161 constitute collimating holes so that the light sensing unit 130 receives a fingerprint signal. However, the first light-blocking layer 140, the second light-blocking layer 150, and the third light-blocking layer 160 are formed by three patterning processes, and the manufacturing of the display panel 100 is complicated. The left and right sides of the first light-blocking layer 140, the second light-blocking layer 150, and the third light-blocking layer 160 are easily transmitted to the stray light, so that the light collected by the light sensing unit 130 is affected by the stray light, resulting in a low signal-to-noise ratio.
In order to solve the above technical problems, the present invention provides a display panel and a display device.
FIG. 2 is a schematic structural diagram of a display panel 200 according to an embodiment of the invention; fig. 3 is a schematic diagram of the structure corresponding to fig. 2.
It should be noted that fig. 3 is a schematic diagram corresponding to fig. 2, that is, fig. 2 is a schematic diagram of a structure of a display panel according to the present invention, and fig. 3 is a schematic diagram added to assist in explaining positions of the second opening 242 and the fourth opening 252 of the second light-blocking layer 250 in fig. 2, in which a first color resist 260 is actually disposed at positions of both the second opening 242 and the fourth opening 252 of the second light-blocking layer 250.
As shown in fig. 2 and 3, the display panel 200 includes: the color film substrate 210 and the array substrate 220 are arranged oppositely; the light sensing unit 230 is located on one side of the array substrate 220 close to the color film substrate 210; a first light-blocking layer 240 and a second light-blocking layer 250, where the first light-blocking layer 240 is located on the side of the color film substrate 210 close to the array substrate 220, and the second light-blocking layer 250 is located on the side of the first light-blocking layer 240 close to the array substrate 220; a plurality of first color pixel units PX located between the color filter substrate 210 and the array substrate 220, wherein the first color pixel units PX include two first color resistors 260 and two second color resistors 270, and the first color is different from the second color; in one first color pixel unit PX, the first light-blocking layer 240 includes a first opening portion 241 and a second opening portion 242, and the second light-blocking layer 250 includes a third opening portion 251 and a fourth opening portion 252; the two first color resistors 260 are respectively positioned at the second opening 242 and the fourth opening 252; second color resist 270 is between first light-blocking layer 240 and second light-blocking layer 250; the second color resist 270 is provided with a fifth opening 271, and orthographic projections of the first opening 241, the third opening 251, the fifth opening 271 and the light sensing unit 230 on the color film substrate 210 are overlapped.
In the embodiment of the present invention, the display panel 200 is used for a liquid crystal display device. A liquid crystal layer LC is disposed between the color film substrate 210 and the array substrate 220. The backlight of the liquid crystal display device exits through the liquid crystal layer LC. The first color pixel unit PX includes two layers of a first color resist 260 and a second color resist 270, the first color being different from the second color. For example, the first color pixel unit PX is a red pixel, the first color resistor 260 is a red resistor, and the second color resistor 270 is a green resistor or a blue resistor. The first color pixel unit PX is a green pixel, the first color resistor 260 is a green resistor, and the second color resistor 270 is a red resistor or a blue resistor. The first color pixel unit PX is a blue pixel, the first color resistor 260 is a blue resistor, and the second color resistor 270 is a red resistor or a green resistor. The first color resistor and the second color resistor block stray light above and below one side of the first color resistor from entering the light sensing unit together. The stray light above one side of the first color resistor is firstly changed into light of the first color through the first color resistor of the second opening part, and then reaches the second color resistor to be filtered. The stray light below one side of the first color resistor is firstly changed into light of the first color through the first color resistor of the fourth opening part, and then reaches the second color resistor to be filtered. In one first color pixel unit PX, the first light-blocking layer 240 is located on a side of the color filter substrate 210 close to the array substrate 220, and the second light-blocking layer 250 is located on a side of the first light-blocking layer 240 close to the array substrate 220. The first light-blocking layer 240 and the second light-blocking layer 250 are formed through a double patterning process. Two first color resists 260 are respectively positioned at the second opening portion 242 of the first light-blocking layer 240 and the fourth opening portion 252 of the second light-blocking layer 250. The non-opening portions of the first light-blocking layer 240 and the second light-blocking layer 250 block light, and the second opening portion 242 of the first light-blocking layer 240 and the fourth opening portion 252 of the second light-blocking layer 250 transmit light. The two first color resists 260 are respectively located at the second opening 242 and the fourth opening 252. The photo sensing unit 230 is located on one side of the array substrate 220 close to the color filter substrate 210. When a finger is positioned on the liquid crystal display device, the light emitted from the first color pixel unit PX is reflected at the finger, and the light sensing unit 230 receives and detects the light reflected by the finger, so as to perform fingerprint recognition. The first opening portion 241 of the first light-blocking layer 240, the third opening portion 251 of the second light-blocking layer 250, the fifth opening portion 271 of the second color resist 270, and the orthographic projection of the light sensing unit 230 on the color film substrate 210 overlap. Therefore, the light reflected by the finger reaches the light sensing unit 230 straightly, and the signal-to-noise ratio of the light sensing unit 230 and the sensitivity of fingerprint recognition are improved.
As shown in fig. 2 and 3, the thickness of the second color resist 270 is greater than the thickness of the first light-blocking layer 240 and greater than the thickness of the second light-blocking layer 250.
In the embodiment of the present invention, the thickness of the second color resist 270 is greater than the thickness of the first light-blocking layer 240 and the thickness of the second light-blocking layer 250. The thickness of the second color resist 270 refers to the height of the second color resist 270 in the direction perpendicular to the display panel of the color film substrate 210. The thickness of the second color resistor 270 is larger, the depth corresponding to the fifth opening 271 in the second color resistor 270 is larger, the path of the light reflected by the finger through the fifth opening 271 is longer, the collimation of the light reflected by the finger reaching the light sensing unit 230 is improved, and the signal-to-noise ratio of the light sensing unit 230 and the sensitivity of fingerprint identification are further improved.
FIG. 4 is a cross-sectional view of the second color resistor 270 of the display panel 200 along a plane parallel to the display panel according to the embodiment of the invention.
As shown in fig. 4, the second color resist 270 continuously surrounds the fifth opening 271 in a direction parallel to the display panel.
In the embodiment of the present invention, the second color resist 270 continuously surrounds the fifth opening 271. The second color resistor 270 has no notch on a circle surrounding the fifth opening 271, so as to prevent external non-second color stray light from entering the fifth opening 271 from the second color resistor 270 at the notch on a circle surrounding the fifth opening 271, so that the signal-to-noise ratio of the light sensing unit 230 and the sensitivity of fingerprint identification are further improved. Meanwhile, compared with the case where the second color resistor 270 continuously surrounds the fifth opening 271 and the second color resistor 270 surrounds the fifth opening 271 in half, the contact area between the second color resistor 270 and the first light blocking layer 240 is larger, and the second light blocking layer 250 is larger, so that the acting force of the second color resistor 270 on the side supporting the array substrate 220 and the side supporting the color filter substrate 210 is larger, and the second color resistor 270 stably supports the side supporting the array substrate 220 and the side supporting the color filter substrate 210.
FIG. 5 is a schematic view of another structure of a display panel 200 according to an embodiment of the invention; fig. 6 is a schematic diagram of the structure corresponding to fig. 5.
Fig. 6 is a schematic diagram corresponding to fig. 5, that is, fig. 5 is a schematic diagram of a structure of another display panel according to the present invention, and fig. 6 is an illustration added to assist in explaining positions of the second opening 242 and the fourth opening 252 of the second light-blocking layer 250 in fig. 5, where in reality, the first color resists 260 are disposed at positions of both the second opening 242 and the fourth opening 252 of the second light-blocking layer 250.
As shown in fig. 5 and 6, the first color pixel unit PX further includes a third color resistor 280, and the colors of the first color resistor 260, the second color resistor 270, and the third color resistor 280 are different from each other; the third color resistor 280 is disposed on one side of the second color resistor 270 close to the array substrate 220, and the third color resistor 280 includes a sixth opening 281; orthographic projections of the first opening portion 241, the third opening portion 251, the fifth opening portion 271, the sixth opening portion 281 and the light sensing unit 230 on the color film substrate 210 are overlapped; the correspondingly disposed second color resist 270 contacts the third color resist 280, the second color resist 270 also contacts the first light-blocking layer 240, and the third color resist 280 also contacts the second light-blocking layer 250.
In the embodiment of the present invention, the colors of the first color resistor 260, the second color resistor 270, and the third color resistor 280 are different from each other. For example, the first color resistor 260 is a red resistor, the second color resistor 270 is a green resistor, and the third color resistor 280 is a blue resistor. The correspondingly disposed second color resist 270 contacts the third color resist 280, the second color resist 270 also contacts the first light-blocking layer 240, and the third color resist 280 also contacts the second light-blocking layer 250. The second color resistor 270 and the third color resistor 280 respectively support one side of the array substrate 220 and one side of the color filter substrate 210 between the array substrate 220 and the color filter substrate 210 without arranging a support pillar between the array substrate 220 and the color filter substrate 210, thereby simplifying the structure and ensuring the box thickness of the liquid crystal display panel
The first opening portion 241 of the first light-blocking layer 240, the third opening portion 251 of the second light-blocking layer 250, the fifth opening portion 271 of the second color resist 270, the sixth opening portion 281 of the third color resist 280, and the orthographic projection of the light-sensing unit 230 on the color film substrate 210 overlap. In which the light reflected by the finger straightly reaches the light sensing unit 230, the signal-to-noise ratio of the light sensing unit 230 and the sensitivity of fingerprint recognition are improved. The first color resistor 260, the second color resistor 270 and the third color resistor 280 can block the stray light above and below the first color resistor 260 from entering the light sensing unit 230. The stray light above the first color resist 260 side first passes through the first color resist 260 of the second opening 242 to become the first color, and then reaches the second color resist 270 or the third color resist 280 to be filtered. The stray light below the first color resistor 260 side first passes through the first color resistor 260 of the fourth opening 252 to become the first color, and then reaches the second color resistor 270 or the third color resistor 280 to be filtered. This further improves the signal-to-noise ratio of the light sensing unit 230 and the sensitivity of fingerprint recognition.
FIG. 7 is a cross-sectional view of the third color filter 280 of the display panel 200 along a plane parallel to the display panel according to the embodiment of the invention.
As shown in fig. 7, the third color resist 280 continuously surrounds the sixth opening 281.
In this embodiment of the present invention, the third color resist 280 continuously surrounds the sixth opening 281. The third color resistor 280 has no gap on a circle surrounding the sixth opening 281, so as to prevent external stray light of a non-third color from entering the sixth opening 281 from the third color resistor 280 at the gap on the circle surrounding the sixth opening 281, so that the signal-to-noise ratio of the light sensing unit 230 and the sensitivity of fingerprint recognition are further improved. Meanwhile, compared with the case where the third color resistor 280 continuously surrounds the sixth opening 281 and the third color resistor 280 semi-surrounds the sixth opening 281, the contact area of the third color resistor 280 with the second light-blocking layer 250 is larger, the acting force of the third color resistor 280 on the side supporting the array substrate 220 is larger, and the third color resistor 280 stably supports the side supporting the array substrate 220.
As shown in fig. 2, 3, 5, and 6, orthographic projections of the first opening portion 241, the third opening portion 251, and the fifth opening portion 271 on the color filter substrate 210 are overlapped.
In the embodiment of the present invention, the second color resist 270 is disposed between the first light-blocking layer 240 and the second light-blocking layer 250, and orthographic projections of the first opening portion 241, the third opening portion 251, and the fifth opening portion 271 on the color filter substrate 210 are overlapped. The non-opening portion of the first light-blocking layer 240 does not block the third opening portion 251 of the second light-blocking layer 250 and the fifth opening portion 271 of the second color resist 270 in the vertical direction. The non-opening portion of the second light-blocking layer 250 does not block the first opening portion 241 of the first light-blocking layer 240 and the fifth opening portion 271 of the second color resist 270 in the vertical direction. The non-opening portion of the second color resist 270 does not block the first opening portion 241 of the first light-blocking layer 240 and the third opening portion 251 of the second light-blocking layer 250 in the vertical direction. This prevents the aperture from being displaced so as to interfere with the collimation of the light reflected by the finger. Similarly, a second color resist 270 and a third color resist 280 are disposed between the first light-blocking layer 240 and the second light-blocking layer 250, and orthographic projections of the first opening portion 241, the third opening portion 251, the fifth opening portion 271 and the sixth opening portion 281 on the color film substrate 210 are overlapped. By the arrangement, the collimating holes can be formed above the light sensing units 230, so that the aperture of the collimating holes is maximized, the verticality of the walls of the collimating holes in the direction perpendicular to the display panel is ensured, stray light entering due to staggering of the opening parts is avoided, and the sensitivity of fingerprint identification can be improved.
As shown in fig. 2, 3, 5, and 6, the thickness of the second color resist 270 is greater than 20 microns.
In an embodiment of the present invention, the thickness of the second color resists 270 is greater than 20 microns. The thickness of the second color resist 270 refers to the dimension of the second color resist 270 in the vertical direction of the color filter substrate 210. Because of the current process capability, the thickness of the light-shielding layer cannot reach 20 microns, the second color resistor replaces the light-shielding layer in the prior art, and the design of the first color resistor is matched, so that the thickness of the second color resistor 270 is larger, the depth of the fifth opening 271 in the second color resistor 270 is larger, the path of the light reflected by the finger through the fifth opening 271 is longer, the collimation degree of the light reflected by the finger reaching the light sensing unit 230 is improved, and the signal-to-noise ratio of the light sensing unit 230 and the sensitivity of fingerprint identification are further improved.
As shown in fig. 2, 3, 5 and 6, the first opening 241, the third opening 251 and the fifth opening 271 form a collimating through-hole 290, and the distance between the upper end and the lower end of the collimating through-hole 290 is greater than 25 μm.
In the embodiment of the present invention, the second color resist 270 is disposed between the first light-blocking layer 240 and the second light-blocking layer 250, and the first opening portion 241, the third opening portion 251, and the fifth opening portion 271 constitute the collimating via 290 and have an upper end and a lower end spaced apart by more than 25 μm. The distance between the upper end and the lower end of the collimating through hole 290 is relatively large, the path of the light reflected by the finger through the collimating through hole 290 is relatively long, the collimation degree of the light reflected by the finger reaching the light sensing unit 230 is improved, and the signal-to-noise ratio of the light sensing unit 230 and the sensitivity of fingerprint identification are improved.
Similarly, the second color resist 270 and the third color resist 280 are disposed between the first light-blocking layer 240 and the second light-blocking layer 250, and the first opening portion 241, the third opening portion 251, the fifth opening portion 271, and the sixth opening portion 281 constitute the collimating through-hole 290 and have an upper end and a lower end spaced apart by more than 25 μm, so that the signal-to-noise ratio of the light sensing unit 230 and the sensitivity of fingerprint recognition are improved.
As shown in fig. 2, 3, 5, and 6, orthographic projections of the two first color resists 260 on the color filter substrate 210 are overlapped.
In the embodiment of the present invention, the orthographic projections of the two first color resists 260 on the color film substrate 210 are overlapped. The orthographic projection of the second opening 242 of the first light-blocking layer 240 and the fourth opening 252 of the second light-blocking layer 250 on the color filter substrate 210 is overlapped. The non-opening portion of the first light-blocking layer 240 does not block the first color resist 260 of the fourth opening portion 252 in the second light-blocking layer 250 in the vertical direction. The non-opening portion of the second light-blocking layer 250 does not block the first color resist 260 positioned at the second opening portion 242 in the first light-blocking layer 240 in the vertical direction. The two layers of first color resists 260 are completely used for emitting light so as to prevent the reduction of the light emitting area of the first color pixel units PX from affecting the image of the display panel 200.
As shown in fig. 2, 3, 5, and 6, orthographic projections of the first color resist 260 and the second color resist 270 on the color filter substrate 210 do not overlap.
In the embodiment of the present invention, the second color resist 270 is disposed between the first light-blocking layer 240 and the second light-blocking layer 250, and orthographic projections of the first color resist 260 and the second color resist 270 on the color film substrate 210 do not overlap. The second color resist 270 does not shield the first color resist 260 of the fourth opening portion 252 in the second light-blocking layer 250 in the vertical direction. The second color resists 270 do not block the first color resists 260 located at the second opening portions 242 in the first light blocking layer 240 in the vertical direction. The two layers of first color resists 260 are completely used for emitting light so as to prevent the reduction of the light emitting area of the first color pixel units PX from affecting the image of the display panel 200.
Similarly, a third color resist 280 is further disposed between the first light-blocking layer 240 and the second light-blocking layer 250, and orthographic projections of the first color resist 260 and the third color resist 280 on the color film substrate 210 do not overlap. The third color resist 280 does not block the first color resist 260 of the fourth opening portion 252 in the second light-blocking layer 250 in the vertical direction. The third color resist 280 does not block the first color resist 260 located at the second opening portion 242 in the first light blocking layer 240 in the vertical direction. The two layers of first color resists 260 are completely used for emitting light so as to prevent the reduction of the light emitting area of the first color pixel units PX from affecting the image of the display panel 200.
As shown in fig. 2, 3, 5 and 6, an orthographic projection of the first light-blocking layer 240 on the color filter substrate 210 coincides with an orthographic projection of the second light-blocking layer 250 on the color filter substrate 210.
In the embodiment of the present invention, an orthographic projection of the first light-blocking layer 240 on the color filter substrate 210 coincides with an orthographic projection of the second light-blocking layer 250 on the color filter substrate 210. The first light blocking layer 240 and the second light blocking layer 250 are formed through two patterning processes using the same mask, so that the manufacturing cost of the display panel 200 is saved.
As shown in fig. 2, 3, 5, and 6, an orthographic projection of the first light-blocking layer 240 on the color filter substrate 210, an orthographic projection of the second color resist 270 on the color filter substrate 210, and an orthographic projection of the second light-blocking layer 250 on the color filter substrate 210 are overlapped.
In the embodiment of the present invention, the second color resist 270 is disposed between the first light-blocking layer 240 and the second light-blocking layer 250, and orthographic projections of the first light-blocking layer 240, the second color resist 270, and the second light-blocking layer 250 on the color filter substrate 210 are overlapped. The first light blocking layer 240, the second color resist 270, and the second light blocking layer 250 are formed through three patterning processes using the same mask, so that the manufacturing cost of the display panel 200 is saved. Similarly, a second color resist 270 and a third color resist 280 are disposed between the first light-blocking layer 240 and the second light-blocking layer 250. Orthographic projections of the first light-blocking layer 240, the second color resist 270, the third color resist 280 and the second light-blocking layer 250 on the color film substrate 210 are overlapped. The first light blocking layer 240, the second color resist 270, the third color resist 280, and the second light blocking layer 250 are formed through four patterning processes, and the four patterning processes use the same mask, so that the manufacturing cost of the display panel 200 is saved.
Fig. 8 is a schematic structural diagram of a display device 300 according to an embodiment of the invention.
As shown in fig. 8, the display device 300 includes a display panel 200.
In the embodiment of the present invention, the display device 300 implements display by using the display panel 200, such as a smart phone or the like. The display panel 200 is described above and will not be described in detail.
In summary, the present invention provides a display panel and a display device. The display panel includes: the color film substrate and the array substrate are oppositely arranged; the light sensing unit is positioned on one side of the array substrate close to the color film substrate; the first light blocking layer is positioned on one side, close to the array substrate, of the color film substrate, and the second light blocking layer is positioned on one side, close to the array substrate, of the first light blocking layer; the first color pixel unit is positioned between the color film substrate and the array substrate and comprises a first color resistor and a second color resistor, and the first color is different from the second color; in the first color pixel unit, the first light-blocking layer includes a first opening and a second opening, and the second light-blocking layer includes a third opening and a fourth opening; the first color resistance is positioned at the second opening part and the fourth opening part; the second color resistance is positioned between the first light-blocking layer and the second light-blocking layer; the second color resistor is provided with a fifth opening, and the orthographic projections of the first opening, the third opening, the fifth opening and the light sensing unit on the color film substrate are overlapped.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. A display panel, comprising:
the color film substrate and the array substrate are oppositely arranged;
the light sensing unit is positioned on one side of the array substrate close to the color film substrate;
the color filter substrate comprises a first light-blocking layer and a second light-blocking layer, wherein the first light-blocking layer is positioned on one side, close to the array substrate, of the color filter substrate, and the second light-blocking layer is positioned on one side, close to the array substrate, of the first light-blocking layer;
the first color pixel units are positioned between the color film substrate and the array substrate and comprise two first color resistors and a second color resistor, and the first color is different from the second color;
in one of the first color pixel units, the first light-blocking layer includes a first opening portion and a second opening portion, and the second light-blocking layer includes a third opening portion and a fourth opening portion; the two first color resistors are respectively positioned at the second opening part and the fourth opening part; the second color resist is positioned between the first light-blocking layer and the second light-blocking layer; the second color resistor is provided with a fifth opening part, and orthographic projections of the first opening part, the third opening part, the fifth opening part and the light sensing unit on the color film substrate are overlapped;
the first opening, the third opening and the fifth opening form a collimation through hole;
two ends of the second color resistor are respectively contacted with the first light blocking layer and the second light blocking layer, and orthographic projections of the first color resistor and the second color resistor on the color film substrate are not overlapped, so that stray light above one side of the first color resistor firstly passes through the first color resistor of the second opening part to be changed into a first color, and then reaches the second color resistor to be filtered; stray light below one side of the first color resistor firstly passes through the first color resistor of the fourth opening part to be changed into a first color, and then reaches the second color resistor to be filtered.
2. The display panel according to claim 1, wherein a thickness of the second color resist is larger than a thickness of the first light-blocking layer and larger than a thickness of the second light-blocking layer.
3. The display panel according to claim 1, wherein the second color resist continuously surrounds the fifth opening portion.
4. The display panel according to claim 1, wherein the first color pixel unit further comprises a third color resistor, and the colors of the first color resistor, the second color resistor and the third color resistor are different from each other;
the third color resistor is arranged on one side, close to the array substrate, of the second color resistor, and the third color resistor comprises a sixth opening;
orthographic projections of the first opening part, the third opening part, the fifth opening part, the sixth opening part and the light sensing unit on the color film substrate are overlapped;
the correspondingly arranged second color resistor is in contact with the third color resistor, the second color resistor is also in contact with the first light blocking layer, and the third color resistor is also in contact with the second light blocking layer.
5. The display panel of claim 4, wherein the third color resist continuously surrounds the sixth opening.
6. The display panel according to claim 1, wherein orthographic projections of the first opening portion, the third opening portion, and the fifth opening portion on the color filter substrate are overlapped.
7. The display panel of claim 1, wherein the second color resist has a thickness greater than 20 microns.
8. The display panel of claim 1 wherein the upper end and the lower end of the collimating via are spaced more than 25 microns apart.
9. The display panel according to claim 1, wherein orthographic projections of the two first color resists on the color film substrate are overlapped.
10. The display panel according to claim 1, wherein an orthographic projection of the first light-blocking layer on the color film substrate coincides with an orthographic projection of the second light-blocking layer on the color film substrate.
11. The display panel according to claim 1, wherein an orthographic projection of the first light-blocking layer on the color film substrate, an orthographic projection of the second color barrier on the color film substrate, and an orthographic projection of the second light-blocking layer on the color film substrate coincide.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 11.
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| US11429001B2 (en) | 2019-12-13 | 2022-08-30 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Liquid crystal display panel and liquid crystal display device |
| CN110928032B (en) * | 2019-12-13 | 2021-09-24 | 武汉华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
| WO2022188161A1 (en) * | 2021-03-12 | 2022-09-15 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN113156697A (en) * | 2021-04-27 | 2021-07-23 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113641024B (en) * | 2021-08-09 | 2024-01-05 | 武汉华星光电技术有限公司 | Display panel and preparation method thereof |
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