CN111723781B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN111723781B CN111723781B CN202010735838.0A CN202010735838A CN111723781B CN 111723781 B CN111723781 B CN 111723781B CN 202010735838 A CN202010735838 A CN 202010735838A CN 111723781 B CN111723781 B CN 111723781B
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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
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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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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Abstract
The application discloses a display panel and a display device. The display panel comprises an array substrate; an opposing substrate; the light sensing units are arranged on the array substrate, the light sensing surface of each light sensing unit faces the opposite substrate, the opposite substrate comprises a first substrate and at least one first light shielding layer positioned on one side, close to the array substrate, of the first substrate, and the first light shielding layer comprises a plurality of hollow units; the hollow units are arranged in one-to-one correspondence with the photosensitive units, the orthographic projection area of the hollow units on the first substrate is larger than that of the photosensitive surfaces of the photosensitive units on the first substrate, and the orthographic projection of the hollow units on the first substrate is overlapped with that of the photosensitive surfaces of the photosensitive units on the first substrate. According to the embodiment of the application, under the condition that the array substrate and the opposite substrate are staggered, the amount of the fingerprint reflected light rays which can be received by the photosensitive unit is not influenced, and the fingerprint identification precision of the display panel is further ensured.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel and a display device.
Background
Since fingerprints of everyone have uniqueness and invariance, a technology of recognizing fingerprints as identities has been rapidly developed in recent years. For example, in the field of mobile phones, the optical fingerprint identification technology is applied more and more widely with the requirement of more and more people on narrow borders and full screens of the mobile phones.
In the related art, the optical fingerprint recognition unit may be integrated on the array substrate side of the display panel, and the light-passing hole may be disposed on the light-sensing surface side of the optical fingerprint recognition unit. The light emitted from the display panel is reflected on the surface of the finger and enters the display panel again, and is received by the optical fingerprint identification unit through the light through hole. The optical fingerprint identification unit can generate different identification information according to the difference of the valleys and ridges of the finger lines on light reflection, so that different finger line information can be identified. However, in the manufacturing process, the light-passing hole and the optical fingerprint identification unit are easily misaligned, so that the fingerprint identification precision is reduced.
Content of application
The application provides a display panel and a display device, which can improve fingerprint identification precision.
In one aspect, an embodiment of the present application provides a display panel, which includes: an array substrate; an opposing substrate; the light sensing units are arranged on the array substrate, the light sensing surface of each light sensing unit faces the opposite substrate, the opposite substrate comprises a first substrate and at least one first light shielding layer positioned on one side, close to the array substrate, of the first substrate, and the first light shielding layer comprises a plurality of hollow units; the hollow units are arranged in one-to-one correspondence with the photosensitive units, the orthographic projection area of the hollow units on the first substrate is larger than that of the photosensitive surfaces of the photosensitive units on the first substrate, and the orthographic projection of the hollow units on the first substrate is overlapped with that of the photosensitive surfaces of the photosensitive units on the first substrate.
In another aspect, embodiments of the present application provide a display device including the display panel according to any one of the embodiments of the foregoing aspect of the present application.
According to the display panel of the embodiment of the application, the array substrate is provided with the photosensitive unit, so that the display panel has light sensing performance. The opposition base plate of this application embodiment includes the first light shield layer of at least one deck, and the fretwork unit and the sensitization unit one-to-one of first light shield layer set up, and the orthographic projection area of fretwork unit on the first substrate of opposition base plate is greater than the orthographic projection area of sensitization face on first substrate of sensitization unit, and the orthographic projection overlap of the orthographic projection of fretwork unit on first substrate and sensitization unit on first substrate. Because the orthographic projection area of fretwork unit on first substrate is greater than the orthographic projection area of the photosurface of sensitization unit on first substrate, even there is the condition of dislocation at array substrate and opposition base plate, also can make the fingerprint reflection light ray volume that the sensitization unit can receive not influenced, and then guarantee display panel's fingerprint identification precision.
Drawings
Other features, objects, and advantages of the present application will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 is a schematic top view of a display panel provided in accordance with an embodiment of the present application;
FIG. 2 is a schematic diagram of a structure of a Q region in FIG. 1 provided as an example;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 1, provided as an example;
FIG. 4 is a schematic diagram of another example of the structure of the Q region of FIG. 1;
FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 1, according to another example;
FIG. 6 is a schematic sectional view taken along line A-A in FIG. 1, according to still another example;
FIG. 7 is a schematic top view of a display panel provided in accordance with another embodiment of the present application;
FIG. 8 is a schematic structural diagram of a P region in FIG. 7, provided as an example;
FIG. 9 is a schematic cross-sectional view taken along line B-B of FIG. 7, according to an exemplary embodiment;
FIG. 10 is a schematic cross-sectional view taken along line B-B of FIG. 7, according to another example;
FIG. 11 is a schematic cross-sectional view taken along line B-B of FIG. 7, according to yet another example;
FIG. 12 is a schematic top view of a display panel provided in accordance with yet another embodiment of the present application;
FIG. 13 is a schematic top view of a display panel provided in accordance with yet another embodiment of the present application;
FIG. 14 is an enlarged schematic view of the P region of FIG. 7 provided as an example;
FIG. 15 is a schematic top view of a display panel provided in accordance with yet another embodiment of the present application;
fig. 16 is a schematic cross-sectional view of a display device according to an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
The embodiment of the present application provides a Display panel, which may be a Liquid Crystal Display (LCD) panel, an Organic Light-Emitting Diode (OLED) Display panel, a Micro LED Display panel, a quantum dot Display panel, or the like. The present application does not limit the type of the display panel. The display panel of the embodiments of the present application may be presented in various forms, some examples of which will be described below.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present application. Fig. 2 is a schematic structural diagram of a Q region in fig. 1 provided as an example. Fig. 3 is a schematic sectional view taken along a-a in fig. 1, provided as an example. The display panel 100 may have a display area AA and a non-display area NA surrounding at least a portion of the periphery of the display area AA. The display panel 100 includes a plurality of pixel units PU arranged in the display area AA, each pixel unit PU including a plurality of sub-pixels PX. Illustratively, each pixel unit PU may include at least a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
The plurality of sub-pixels PX are arranged in an array of rows and columns in the display area AA, for example. Although not shown in the drawings, the display panel 100 may include a plurality of scan lines each extending in a row direction of the arrangement structure of the plurality of sub-pixels PX, and a plurality of data lines each extending in a column direction of the arrangement structure of the plurality of sub-pixels PX. Each row of the subpixels PX is connected to the gate driving circuit through a corresponding one of the scanning lines, so that a gate signal of the gate driving circuit can be received. Each column of the sub-pixels PX is connected to the data driving circuit through a corresponding one of the data lines, so as to be capable of receiving a data signal (e.g., a gray scale voltage signal) from the data driving circuit.
The display panel 100 includes an array substrate 110, an opposite substrate 120 disposed opposite to the array substrate 110, and a plurality of light sensing units 140. The plurality of light sensing units 140 are disposed on the array substrate 110, and a light sensing surface 140a of each light sensing unit 140 faces the opposite substrate 120. In the drawings of the present application, the display panel is taken as an example of a liquid crystal display panel, and the display panel 100 further includes a liquid crystal layer 130, and the liquid crystal layer 130 is sandwiched between the array substrate 110 and the opposite substrate 120. For example, the display panel is a liquid crystal display panel, the opposite substrate 120 may be a color filter substrate, and the opposite substrate 120 may include a plurality of color resist units (not shown). The color resistance unit may include a red color resistance unit, a green color resistance unit, and a blue color resistance unit to respectively transmit red light, green light, and blue light, thereby realizing color display of the display panel.
In some embodiments, the opposite substrate 120 includes a first substrate 121 and at least one first light shielding layer 122 on a side of the first substrate 121 close to the array substrate 110. The first light shielding layer 122 includes a plurality of hollow units HU. Each of the hollow units HU is located between adjacent sub-pixels PX.
In the direction perpendicular to the display panel 100, the hollow units HU and the light sensing units 140 are disposed in a one-to-one correspondence. The orthographic projection area of the hollow unit HU on the first substrate 121 is larger than the orthographic projection area of the light sensing surface 140a of the light sensing unit 140 on the first substrate 121, and the orthographic projection of the hollow unit HU on the first substrate 121 overlaps with the orthographic projection of the light sensing surface 140a of the light sensing unit 140 on the first substrate 121.
In the drawings, the orthographic projection of the hollow unit HU on the first substrate 121 and the orthographic projection of the photosensitive surface 140a of the photosensitive unit 140 on the first substrate 121 are both rectangular. The orthographic projection of the hollow unit HU on the first substrate 121 and the orthographic projection of the light sensing surface 140a of the light sensing unit 140 on the first substrate 121 may also be circular or elliptical, or may also be in other shapes, which is not limited in this application.
As shown in fig. 2, when the array substrate 110 and the opposite substrate 120 are well aligned, the center point of the orthographic projection of the photosensitive surface 140a of the photosensitive unit 140 on the first substrate 121 coincides with the center point of the orthographic projection of the hollow unit HU on the first substrate 121. As shown in fig. 4, when there is an error in the alignment between the array substrate 110 and the opposite substrate 120, the orthographic projection of the light sensing surface 140a of the light sensing unit 140 on the first substrate 121 is close to the edge of the orthographic projection of the hollowed-out unit HU on the first substrate 121. However, because the orthographic projection area of the hollowed-out unit HU on the first substrate 121 is larger than the orthographic projection area of the photosensitive surface 140a of the photosensitive unit 140 on the first substrate 121, even if the array substrate 110 and the opposite substrate 120 are staggered, the orthographic projection of the photosensitive surface 140a of the photosensitive unit 140 on the first substrate 121 is located in the orthographic projection of the hollowed-out unit HU on the first substrate 121, that is, the effective clear area that the photosensitive unit 140 can recognize is not affected, so that the amount of the fingerprint reflected light rays that the photosensitive unit 140 can receive is not affected, and further, the fingerprint recognition accuracy of the display panel is guaranteed.
For example, the sample display panel on the same production line may be inspected, for example, the misalignment amount MA between the array substrate and the opposite substrate in the sample display panel may be inspected, and the size difference between the hollow unit HU and the light sensing surface 140a of the light sensing unit 140 may be set according to the measured misalignment amount MA. For example, as shown in fig. 2, the orthogonal projection of the light sensing surface 140a of the light sensing unit 140 on the first substrate 121 and the adjacent two sides of the orthogonal projection of the hollow unit HU on the first substrate 121 have a vertical distance d, wherein the unit of the displacement amount MA and the distance d can be micrometer, and can be set as d > MA, the size of the hollow unit HU and the light sensing surface 140a of the light sensing unit 140 is set according to d, so as to ensure that the orthographic projection of the photosensitive surface 140a of the photosensitive unit 140 on the first substrate 121 is located in the orthographic projection of the hollowed-out unit HU on the first substrate 121 even when the array substrate 110 and the opposite substrate 120 are misaligned, that is, it is ensured that the effective light-passing area that the photosensitive unit 140 can recognize is not affected, so that the amount of the fingerprint reflected light that the photosensitive unit 140 can receive is not affected, and the fingerprint recognition accuracy of the display panel is ensured.
As shown in fig. 3, the opposite substrate 120 may include only one first light-shielding layer 122. As shown in fig. 5 and 6, the opposite substrate 120 may also include a plurality of first light-shielding layers 122 stacked on each other, that is, the plurality of first light-shielding layers 122 are located on the same side of the first substrate 121. Orthographic projections of the hollow units HU of each layer of the first light shielding layer 122 on the first substrate 121 are overlapped, and the orthographic projection area of the hollow units HU of each layer of the first light shielding layer 122 on the first substrate 121 is larger than that of the light sensing surface 140a of the light sensing unit 140 on the first substrate 121.
In some embodiments, the orthographic projection area of the hollow units HU of each first light-shielding layer 122 on the first substrate 121 may be the same, that is, the size of the hollow units HU of each first light-shielding layer 122 is the same. As shown in fig. 5, the counter substrate 120 is shown to include three first light-shielding layers 122. The hollow units HU of the three first light-shielding layers 122 have the same size. For example, the hollow units HU have a rectangular structure, and the side lengths of each layer of hollow units HU are the same. Through set up the first light shield layer 121 of multilayer in opposition base plate 120 side, can improve the collimation effect of fretwork unit HU to light, can avoid the reverberation of adjacent fingerprint ridge or fingerprint valley to reach same sensitization unit 140 and cause the interference.
In other embodiments, the orthographic projection area of the hollow units HU of each first light-shielding layer 122 on the first substrate 121 may be different. For example, as shown in fig. 6, in two adjacent first light-shielding layers 122, an orthographic projection area of the hollow unit HU of the first light-shielding layer 122 far from the first substrate 121 on the first substrate 121 is larger than an orthographic projection area of the hollow unit HU of the first light-shielding layer 122 near the first substrate 121 on the first substrate 121. That is, in a direction from the first substrate 121 to the array substrate 110, the forward projection area of the hollow units HU of the first light shielding layer 122 on the first substrate 121 is gradually increased. In general, in the manufacturing process, a first light-shielding layer 122 and a hollow unit HU are formed on one side of the first substrate 121, a second light-shielding layer 122 and a hollow unit HU are formed on one side of the first light-shielding layer 122 opposite to the first substrate 121, a third light-shielding layer 122 and a hollow unit HU are formed on one side of the second light-shielding layer 122 opposite to the first substrate 121, and so on. In the manufacturing process, the hollowed-out units HU adjacent to the first light-shielding layer 122 may be misaligned. And this application sets up the orthographic projection area of the fretwork unit HU of the first light shield layer 122 of keeping away from first substrate 121 on first substrate 121 to be greater than the orthographic projection area of the fretwork unit HU of the first light shield layer 122 that is close to first substrate 121, even there is the dislocation in the fretwork unit HU of adjacent first light shield layer 122, also can guarantee that the fretwork unit HU of the first light shield layer 122 of keeping away from first substrate 121 covers the fretwork unit HU of the first light shield layer 122 that is close to first substrate 121 completely, guarantee promptly that the effective clear area that multilayer fretwork unit HU formed is not influenced, and then make the fingerprint reflection light quantity that sensitization unit 140 can receive not influenced, guarantee display panel's fingerprint identification precision.
For example, the size of each layer of the hollow units HU may be set according to the above-mentioned manner of setting the sizes of the hollow units HU and the light-sensing surface 140a of the light-sensing unit 140, and will not be described herein again.
In some embodiments, the hollowed-out unit HU may include at least one first hollowed-out portion 123. As shown in fig. 1, 5 or 6, the hollow unit HU of each first light-shielding layer 122 includes a first hollow portion 123.
In other embodiments, as shown in fig. 7 to 15, the hollow unit HU may include a plurality of first hollows 123. For example, the first hollowed-out portion 123 may include a main hollowed-out portion 1231 and at least one auxiliary hollowed-out portion 1232. The orthographic projection area of the main hollow 1231 on the first substrate 121 is equal to the orthographic projection area of the light sensing surface 140a of the light sensing unit 140 on the first substrate 121. The orthographic projection area of the main hollowed-out portion 1231 on the first substrate 121 is larger than that of the auxiliary hollowed-out portion 1232 on the first substrate. As shown in fig. 8, in a case where the array substrate 110 and the opposite substrate 120 are not misaligned, the light reflected by the finger may reach the light sensing unit 140 through the main hollow 1231. Under the condition that there is the dislocation in array substrate 110 and opposition base plate 120, it can have the overlap with the orthographic projection of sensitization face 140a of sensitization unit 140 on first substrate 121 to assist the orthographic projection of fretwork portion 1232 on first substrate 121, thus, assist fretwork portion 1232 and can play the compensatory action, make the light that the finger was reflected can reach sensitization unit 140 through assisting fretwork portion 1232, thereby guarantee that effective clear area that sensitization unit 140 can discern is not influenced, can make the fingerprint reflection light ray volume that sensitization unit 140 can receive not influenced, and then guarantee display panel's fingerprint identification precision. In addition, the orthographic projection area of the main hollow portion 1231 on the first substrate 121 is set to be larger than the orthographic projection area of the auxiliary hollow portion 1232 on the first substrate 121, so that the interference caused by the reflected light of adjacent fingerprint ridges or fingerprint valleys reaching the same photosensitive unit 140 can be avoided.
In the case where the hollowed-out unit HU includes the main hollowed-out portion 1231 and the auxiliary hollowed-out portion 1232, in some embodiments, as shown in fig. 9, the opposite substrate 120 may include only one first light-shielding layer 121; in other embodiments, as shown in fig. 10 and 11, the opposite substrate 120 may include only the plurality of first light-shielding layers 121 stacked one on another.
In some embodiments, referring to fig. 10, the orthographic projection area of the hollow units HU of each layer of the first light-shielding layer 122 on the first substrate 121 may be the same, that is, the orthographic projection area of the main hollow portions 1231 of the hollow units HU of each layer of the first light-shielding layer 122 on the first substrate 121 is the same, and the orthographic projection area of the auxiliary hollow portions 1232 of the hollow units HU of each layer of the first light-shielding layer 122 on the first substrate 121 is also the same. In fig. 10, the hollowed-out unit HU of each layer of the first light-shielding layer 122 includes two auxiliary hollowed-out portions 1232, and the two auxiliary hollowed-out portions 1232 are respectively located at two sides of the main hollowed-out portion 1231. The orthographic projection areas of the auxiliary hollowed-out portions 1232 at the opposite positions on the first substrate 121 are the same, that is, the orthographic projection areas of the auxiliary hollowed-out portions 1232 on the first substrate 121, which are located on the same side of the main hollowed-out portion 1231 in each layer of hollowed-out units HU, are the same. In addition, the orthographic projection areas of the two auxiliary hollowed-out portions 1232 on the first substrate 121 may be the same or different, and the application is not limited thereto.
In some embodiments, referring to fig. 11, the forward projection areas of the hollow units HU of each first light-shielding layer 122 on the first substrate 121 are different. For example, the orthographic projection area of the main hollow portion 1231 in the hollow unit HU of each first light-shielding layer 122 on the first substrate 121 is the same, and in two adjacent first light-shielding layers 122, the orthographic projection area of the auxiliary hollow portion 1232 in the hollow unit HU of the first light-shielding layer 122 far away from the first substrate 121 on the first substrate 121 is greater than the orthographic projection area of the auxiliary hollow portion 1232 in the hollow unit HU of the first light-shielding layer 122 near the first substrate 121 at the relative position. That is, in a direction from the first substrate 121 to the array substrate 110, the forward projection area of the auxiliary hollowed-out portions 1232 at the opposite positions on the first substrate 121 is gradually increased. So, even there is the dislocation in the fretwork unit HU of adjacent first light shield layer 122, also can guarantee to keep away from the fretwork unit HU of the first light shield layer 122 of first substrate 121 and cover the fretwork unit HU that is close to the first light shield layer 122 of first substrate 121 completely, guarantee promptly that the effective clear area that multilayer fretwork unit HU formed is not influenced, and then make the fingerprint reflection light ray volume that sensitization unit 140 can receive not influenced, guarantee display panel's fingerprint identification precision.
In addition, the misalignment direction of the middle array substrate and the opposite substrate of the sample display panel on the same production line may be detected, and if the array substrate and the opposite substrate are misaligned in the first direction X as shown in fig. 7, the auxiliary hollowed-out portions 1232 may be disposed at both sides of the main hollowed-out portions 1231 in the first direction X. As shown in fig. 12, if the array substrate and the opposite substrate are misaligned in the second direction Y, the auxiliary hollowed portions 1232 may be disposed on both sides of the main hollowed portions 1231 in the second direction Y. As shown in fig. 13, if the array substrate and the opposite substrate are misaligned in both the first direction X and the second direction Y, four auxiliary hollowed-out portions 1232 may be provided, two of the auxiliary hollowed-out portions 1232 may be provided on both sides of the main hollowed-out portion 1231 in the first direction X, and the other two auxiliary hollowed-out portions 1232 may be provided on both sides of the main hollowed-out portion 1231 in the second direction Y. The first direction X may be a row direction of the display panel, and the second direction Y may be a column direction of the display panel. It should be understood that the row and column directions may be interchanged.
So, set up in the direction of array substrate and opposition base plate dislocation and assist fretwork portion 1232 to guarantee that supplementary fretwork portion 1232 can play the compensation effect, make the light of finger reflection can reach sensitization unit 140 through assisting fretwork portion 1232, thereby guarantee that the effective clear area that sensitization unit 140 can discern is not influenced, can make the fingerprint reflection light ray volume that sensitization unit 140 can receive not influenced, and then guarantee display panel's fingerprint identification precision.
In order to realize the identification of the finger print under the screen without affecting the display of the display panel, the hollow units HU are usually disposed between the adjacent sub-pixels PX. And the region between adjacent sub-pixel PX is the rectangle region usually, in order to realize the area maximize of fretwork unit HU, can all set up main fretwork portion 1231 and supplementary fretwork portion 1232 into the rectangle structure, main fretwork portion 1231 and the orthographic projection of assisting fretwork portion 1232 on first substrate 121 are the rectangle promptly, so, can form the fretwork unit HU of great area in limited space, thereby improve the effective clear area of fretwork unit HU, improve display panel's fingerprint identification precision.
In some embodiments, as shown in fig. 7 or fig. 12, in the case that the orthographic projections of the main hollowed-out portions 1231 and the auxiliary hollowed-out portions 1232 on the first substrate 121 are both rectangular, the number of the auxiliary hollowed-out portions 1232 may be two, and the two auxiliary hollowed-out portions 1232 are located on two opposite sides of the main hollowed-out portion 1231. The two auxiliary hollowed-out portions 1232 may be symmetrical with respect to the main hollowed-out portion 1231. The two opposite sides of the main hollowed-out portion 1231 are respectively provided with one auxiliary hollowed-out portion 1232, the array substrate and the opposite substrate are staggered towards any one of the two sides, and at least one auxiliary hollowed-out portion 1232 is arranged to play a compensation role, so that light reflected by a finger can reach the photosensitive unit 140 through the auxiliary hollowed-out portions 1232.
In other embodiments, as shown in fig. 13, in the case that the orthographic projections of the main hollow portions 1231 and the auxiliary hollow portions 1232 on the first substrate 121 are both rectangular, the number of the auxiliary hollow portions 1232 is four, and the four auxiliary hollow portions 1232 are respectively located at four sides of the main hollow portion 1231. Wherein, the two auxiliary hollowed-out portions 1232 positioned at the opposite sides may be symmetrical with respect to the main hollowed-out portion 1231. Thus, the array substrate and the opposite substrate are staggered towards any one of the four sides, and at least one auxiliary hollow part 1232 is arranged to play a compensation role, so that the light reflected by the finger can reach the photosensitive unit 140 through the auxiliary hollow part 1232.
Referring to fig. 14, in a case that orthographic projections of the main hollow portions 1231 and the auxiliary hollow portions 1232 on the first substrate 121 are both rectangular, the orthographic projection of the auxiliary hollow portions 1232 on the first substrate 121 includes a first side a1 and a second side a2 that are perpendicular to each other, the orthographic projection of the main hollow portions 1231 on the first substrate 121 includes a third side a3 and a fourth side a4 that are perpendicular to each other, the first side a1 is parallel to and adjacent to the third side a3, and a length of the first side a1 is greater than or equal to a length of the third side a 3. Since the orthographic projection area of the main hollow 1231 on the first substrate 121 is equal to the orthographic projection area of the light sensing surface 140a of the light sensing unit 140 on the first substrate 121, illustratively, the first side a1 extends along the second direction Y, the length of the first side a1 is greater than or equal to the length of the third side a3, it is understood that the length of the first side a1 is greater than or equal to the length of the edge in the second direction Y of the orthographic projection of the photosensitive surface 140a of the photosensitive unit 140 on the first substrate 121, in this way, if the array substrate 110 and the opposite substrate 120 are misaligned in the first direction X, the auxiliary hollow portions 1232 can be ensured to completely cover the light-sensing surface 140a of the light-sensing unit 140 in the second direction Y, that is, it is ensured that the effective light-passing area that the photosensitive unit 140 can recognize is not affected, so that the amount of the fingerprint reflected light that the photosensitive unit 140 can receive is not affected, and the fingerprint recognition accuracy of the display panel is ensured.
Illustratively, as shown in fig. 14, the first side a1 is at a perpendicular distance c from the third side a3, the second side a2 has a length f, and the length f of the second side a2 may be set to be greater than c. Where f and c may be in microns. For example, when the displacement amount MA of the array substrate and the opposite substrate in the first direction X is greater than c, the auxiliary hollowed-out portion 1232 can compensate the light flux. It can be understood that the larger the difference between MA and c is, the more the auxiliary hollowed-out portion 1232 compensates the light flux. When the length f of the second side a2 is greater than c, the offset amount MA is prevented from being too large when the array substrate 110 and the counter substrate 120 are offset in the first direction X, and the auxiliary hollow portions 1232 are prevented from completely covering the photosensitive surface 140a of the photosensitive unit 140 in the first direction X.
In still other embodiments, as shown in fig. 15, the number of the auxiliary hollowed-out portions 1232 may be one, and the auxiliary hollowed-out portions 1232 are disposed around the main hollowed-out portion 1231. Therefore, no matter the array substrate and the opposite substrate are staggered in any direction, the auxiliary hollowed-out portions 1232 arranged in a surrounding mode can play a compensation role, and light reflected by the fingers can reach the photosensitive unit 140 through the auxiliary hollowed-out portions 1232.
In some embodiments, as shown in fig. 3, the array substrate 110 includes a second light-shielding layer 112. The second light-shielding layer 112 is located on a side of the light-sensing unit 140 close to the opposite substrate 120. The array substrate 110 may further include a second substrate 111, and the second substrate 111 is located at a side of the photosensitive unit 140 facing away from the opposite substrate 120. The second light-shielding layer 112 includes a plurality of second hollow portions 113, and the hollow units HU, the second hollow portions 113, and the light-sensing units 140 are disposed in a one-to-one correspondence manner. The orthographic projection area of the second hollow-out portion 113 on the first substrate 121 is greater than or equal to the orthographic projection area of the photosensitive surface 140a of the photosensitive unit 140 on the first substrate 121, and the orthographic projection area of the second hollow-out portion 113 on the first substrate 121 is smaller than the orthographic projection area of the hollow-out unit HU on the first substrate 121. The light shielding layer and the hollow portion are also disposed on the array substrate 110 side, so that the light collimation effect can be further improved, and interference caused by reflected light of adjacent fingerprint ridges or fingerprint valleys reaching the same photosensitive unit 140 can be avoided. In addition, the orthographic projection area of the second hollow portion 113 on the first substrate 121 is set to be greater than or equal to the orthographic projection area of the light-sensing surface 140a of the light-sensing unit 140 on the first substrate 121, so that the second hollow portion 113 can completely cover the light-sensing surface 140a of the light-sensing unit 140, and light rays coming from the hollow unit HU can reach the light-sensing surface 140a of the light-sensing unit 140. The orthographic projection area of the second hollow-out part 113 on the first substrate 121 is set to be smaller than the orthographic projection area of the hollow-out unit HU on the first substrate 121, and light rays of adjacent hollow-out units HU can be prevented from reaching the same second hollow-out part 113, so that light ray interference is avoided.
In the present application, the first substrate 121 and the second substrate 111 may be both glass substrates or substrates made of other materials, which is not limited in the present application.
In the present application, the first light-shielding layer 122 and the second light-shielding layer 112 may be both opaque Black light-shielding layers, and for example, the first light-shielding layer 122 and the second light-shielding layer 112 may be formed of Black Matrix (BM). Of course, the first light-shielding layer 122 and the second light-shielding layer 112 may be formed of other light-shielding materials, which is not limited in the present application.
In some embodiments, referring to fig. 3, the display panel 100 may further include a first polarizer 150, a second polarizer 160, and a touch layer 170. The first polarizer 150 is located on a side of the opposite substrate 120 opposite to the array substrate 110. The touch layer 170 is located on a side of the first polarizer 150 opposite to the opposite substrate 120. The second polarizer 160 is located on a side of the array substrate 110 opposite to the opposite substrate 120.
The application also provides a display device which comprises the display panel provided by the application. Referring to fig. 16, fig. 16 is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure. Fig. 16 provides a display device 1000 including the display panel 100 according to any of the above embodiments of the present application.
As shown in fig. 16, when the display panel 100 is a liquid crystal display panel, the display device may further include a backlight module 200 disposed opposite to the display panel 100. The light emitted from the backlight assembly 200 can propagate outward through the display panel 100.
Although not shown in the drawings, the backlight assembly 200 further includes a light source assembly, such as an LED light source assembly, and a light guide plate. In some embodiments, the light source assembly is a side lamp type, and the light source assembly is disposed at the side of the light guide plate. In some embodiments, the light source assembly is a direct-type light source assembly disposed on a side of the light guide plate facing away from the display panel 100.
It should be understood that the display device provided in the embodiments of the present application may be other display devices with a display function, such as a computer, a television, and a vehicle-mounted display device, and the present application is not limited thereto. The display device provided in the embodiment of the present application has the beneficial effects of the display panel provided in the embodiment of the present application, and specific reference may be specifically made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
In accordance with the embodiments of the present application as described above, these embodiments are not exhaustive and do not limit the application to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.
Claims (9)
1. A display panel, comprising:
an array substrate;
an opposing substrate; and
a plurality of photosensitive cells provided on the array substrate, a photosensitive surface of each of the photosensitive cells facing the counter substrate;
the opposite substrate comprises a first substrate and at least one first light shielding layer positioned on one side of the first substrate close to the array substrate, and the first light shielding layer comprises a plurality of hollow units;
the hollow units and the photosensitive units are arranged in a one-to-one correspondence manner, the orthographic projection area of the hollow units on the first substrate is larger than that of the photosensitive surfaces of the photosensitive units on the first substrate, and the orthographic projection of the hollow units on the first substrate is overlapped with that of the photosensitive surfaces of the photosensitive units on the first substrate;
the hollow unit comprises at least one first hollow part, the first hollow part comprises a main hollow part and at least one auxiliary hollow part, the main hollow part is in orthographic projection area on the first substrate is equal to the photosensitive area of the photosensitive unit is in orthographic projection area on the first substrate, the main hollow part is in orthographic projection area on the first substrate is greater than the auxiliary hollow part is in orthographic projection area on the first substrate, the main hollow part and the auxiliary hollow part are arranged at intervals, and the first light shielding layer is arranged.
2. The display panel according to claim 1, wherein the opposite substrate comprises a plurality of stacked first light shielding layers, orthographic projections of the hollow units of each first light shielding layer on the first substrate are overlapped, and the orthographic projection area of the hollow units of each first light shielding layer on the first substrate is larger than that of the light sensing surface of the light sensing unit on the first substrate; wherein the content of the first and second substances,
the orthographic projection area of the hollow units of each layer of the first light shielding layer on the first substrate is the same, or in the adjacent two layers of the first light shielding layers, the orthographic projection area of the hollow units of the first light shielding layer far away from the first substrate on the first substrate is larger than the orthographic projection area of the hollow units of the first light shielding layer close to the first substrate on the first substrate.
3. The display panel according to claim 1, wherein orthographic projections of the main hollow portions and the auxiliary hollow portions on the first substrate are both rectangular, the number of the auxiliary hollow portions is two, and the two auxiliary hollow portions are located on two opposite sides of the main hollow portion.
4. The display panel according to claim 1, wherein orthographic projections of the main hollow portions and the auxiliary hollow portions on the first substrate are both rectangular, the number of the auxiliary hollow portions is four, and the four auxiliary hollow portions are respectively located on four sides of the main hollow portion.
5. The display panel according to claim 3 or 4, wherein an orthographic projection of the auxiliary hollow parts on the first substrate comprises a first edge and a second edge which are perpendicular to each other, an orthographic projection of the main hollow parts on the first substrate comprises a third edge and a fourth edge which are perpendicular to each other, the first edge is parallel to and adjacent to the third edge, and the length of the first edge is greater than or equal to that of the third edge.
6. The display panel according to claim 5, wherein the length of the second side is greater than a perpendicular distance between the first side and the third side.
7. The display panel according to claim 1, wherein the number of the auxiliary hollow-out portions is one, and the auxiliary hollow-out portions are disposed around the main hollow-out portion.
8. The display panel according to claim 1, wherein the array substrate includes a second light shielding layer, the second light shielding layer is located on a side of the light sensing unit close to the opposite substrate, the second light shielding layer includes a plurality of second hollow portions, the second hollow portions and the light sensing units are arranged in a one-to-one correspondence, an orthographic projection area of the second hollow portions on the first substrate is greater than or equal to an orthographic projection area of the light sensing surfaces of the light sensing units on the first substrate, and the orthographic projection area of the second hollow portions on the first substrate is smaller than the orthographic projection area of the hollow portions on the first substrate.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
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| CN112306293B (en) * | 2020-10-28 | 2023-12-01 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| TWI804279B (en) * | 2020-12-09 | 2023-06-01 | 友達光電股份有限公司 | Display device and method of scanning image |
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| CN109657630A (en) * | 2018-12-25 | 2019-04-19 | 上海天马微电子有限公司 | Display panel, the touch identification method of display panel and display device |
| CN110333620A (en) * | 2019-04-30 | 2019-10-15 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110399797A (en) * | 2019-06-25 | 2019-11-01 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110727135A (en) * | 2019-10-28 | 2020-01-24 | 厦门天马微电子有限公司 | Color film substrate, display panel and display device |
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| KR20190006374A (en) * | 2017-07-10 | 2019-01-18 | 삼성전자주식회사 | The Image Sensor including the Blocking Member for blocking the interference between a plurality of light receiving sensors and the Electronic Device including the Image Sensor |
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| CN109657630A (en) * | 2018-12-25 | 2019-04-19 | 上海天马微电子有限公司 | Display panel, the touch identification method of display panel and display device |
| CN110333620A (en) * | 2019-04-30 | 2019-10-15 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110399797A (en) * | 2019-06-25 | 2019-11-01 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110727135A (en) * | 2019-10-28 | 2020-01-24 | 厦门天马微电子有限公司 | Color film substrate, display panel and display device |
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