CN110008885B - Display panel and display device - Google Patents
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- CN110008885B CN110008885B CN201910247589.8A CN201910247589A CN110008885B CN 110008885 B CN110008885 B CN 110008885B CN 201910247589 A CN201910247589 A CN 201910247589A CN 110008885 B CN110008885 B CN 110008885B
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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
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Abstract
The invention discloses a display panel and a display device. The display panel comprises a display area, wherein the display area comprises a plurality of pixels arranged in an array, each pixel comprises at least three sub-pixels, and each sub-pixel comprises a pixel electrode; the pixel comprises a fingerprint pixel, the fingerprint pixel comprises a fingerprint identification unit, the fingerprint identification unit comprises an alignment hole and a light sensing unit, the alignment hole is overlapped with the light sensing unit in the direction perpendicular to the display panel, and the fingerprint identification unit is at least positioned in one sub-pixel; in a fingerprint pixel: in the direction perpendicular to the display panel, the light sensing unit and the pixel electrode are not overlapped. The invention can improve the problem of poor display and improve the display effect.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the development of science and technology, a variety of display devices with fingerprint identification functions appear in the market, such as mobile phones, tablet computers, intelligent wearable devices and the like. The fingerprint is unique for every person, and the safety factor of the display device can be improved by adopting the fingerprint identification function.
The existing fingerprint identification technology is divided into capacitive fingerprint identification and optical fingerprint identification, and the integration of the optical fingerprint identification in a display panel to realize the fingerprint identification in a display area of the display panel is a hot point of current research. At present, the research of applying the fingerprint identification technology to the organic light emitting display panel is mature, and the research of applying the light sensation fingerprint identification technology to the liquid crystal display panel screen is still rare.
Therefore, it is an urgent technical problem to provide a display device of a display panel that realizes light sensing fingerprint identification in a liquid crystal display screen and can simultaneously ensure the display effect of the display panel.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, which implement light sensing fingerprint identification in a liquid crystal display and ensure the display effect of the display panel.
In order to solve the above technical problem, a first aspect of the present invention provides a display panel including:
the display device comprises a display area, a driving circuit and a control circuit, wherein the display area comprises a plurality of pixels arranged in an array, each pixel comprises at least three sub-pixels, and each sub-pixel comprises a pixel electrode;
the pixel comprises a fingerprint pixel, the fingerprint pixel comprises a fingerprint identification unit, the fingerprint identification unit comprises an alignment hole and a light sensing unit, the alignment hole is overlapped with the light sensing unit in the direction perpendicular to the display panel, and the fingerprint identification unit is at least positioned in one sub-pixel;
in a fingerprint pixel: in the direction perpendicular to the display panel, the light sensing unit and the pixel electrode are not overlapped.
In a second aspect, the present invention further provides a display device including any one of the display panels provided by the present invention.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
according to the display panel provided by the invention, the pixels comprise fingerprint pixels, the fingerprint pixels comprise fingerprint identification units, and the light sensing units in the fingerprint identification units are arranged in the fingerprint identification pixels and are not overlapped with the pixel electrodes. The pixel electrode does not need to cross the groove on the light sensing unit when the display panel is manufactured, so that the risk of line breakage caused by crossing the groove by the pixel electrode can be avoided; meanwhile, the light sensing units are not overlapped with the pixel electrodes, namely the alignment holes are not overlapped with the pixel electrodes, so that electric fields formed after the pixel electrodes and the first electrodes are respectively applied with voltage do not exist in the corresponding areas of the alignment holes, liquid crystal molecules in the areas cannot deflect, light rays reflected by the areas where the light sensing units are located cannot penetrate through the liquid crystal molecule layers and are emitted out of the display panel through the alignment holes, and the problem of poor display is solved.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a simplified diagram of a display panel according to the related art;
FIG. 2 is a schematic top view of a display panel according to the present invention;
FIG. 3 is a cross-sectional view of an alternative embodiment of the display panel at line A-A' of FIG. 2;
FIG. 4 is a schematic top view of an alternative embodiment of a display panel according to the present invention;
FIG. 5 is a schematic top view of an alternative embodiment of a finger print pixel in a display panel according to the present invention;
FIG. 6 is a schematic top view of another alternative embodiment of a display panel according to the present invention;
FIG. 7 is a schematic top view of another alternative embodiment of a display panel according to the present invention;
FIG. 8 is a cross-sectional view taken along line B-B' of FIG. 7;
FIG. 9 is a schematic top view of another alternative embodiment of a display panel according to the present invention;
FIG. 10 is a schematic top view of another alternative embodiment of a display panel according to the present invention;
FIG. 11 is a schematic cross-sectional view of an alternative embodiment taken along line A-A' of FIG. 2;
FIG. 12 is a schematic cross-sectional view of an alternative embodiment taken along line A-A' of FIG. 2;
fig. 13 is a schematic view of a display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a simplified schematic diagram of a display panel in the related art, and as shown in fig. 1, the display panel includes an array substrate 101', a color filter substrate 102', and a liquid crystal layer 103', the display panel includes a fingerprint identification unit ZY ' including a light sensing unit W ' and a collimating hole K ' that are correspondingly disposed, wherein the fingerprint identification unit ZY ' is fabricated on one side of the array substrate 101', and a thin film transistor structure in the array substrate 101' is not shown in the figure. In the fingerprint identification stage, the light reflected by the finger is emitted to the light sensing unit W ' through the collimating hole K ', and the light sensing unit W ' identifies the valleys and ridges of the fingerprint according to the intensity of the detected light signal because of the difference of the intensity of the light reflected by the valleys and ridges of the fingerprint, so that the fingerprint identification is realized through imaging operation. The inventors have found that the display panel shown in fig. 1 has a problem of poor display in application.
The inventors have found out the cause of poor display through a great deal of research and analysis, on one hand, in the related art, when the array substrate 101' of the display panel is fabricated, in order to satisfy the conductive requirement of the light sensing unit W ', the first electrode Y1' needs to be disposed above and electrically connected to the light sensing unit W ', the film J1 between the first electrode Y1' and the light sensing unit W ' needs to be cut away, so as to form a groove above the light sensing unit W ', the first electrode Y1' is electrically connected to the light sensing unit W ' in the groove, in order to ensure the light transmittance of the film above the light sensing unit W ', a portion of the film above the light sensing unit W ' needs to be cut away (such as the film J2 illustrated in the figure), so as to form a deeper groove C ' above the light sensing unit W ', and then when the pixel electrode X ' is fabricated above the light sensing unit W ', the pixel electrode X ' needs to cross over the groove C ', moreover, due to the fact that the manufacturing material of the pixel electrode X ' is thin, the pixel electrode X ' has a risk of disconnection at the position of the groove C ', and after the pixel electrode X ' is disconnected, the sub-pixel corresponding to the pixel electrode X ' cannot be normally displayed, so that a poor display phenomenon is caused; on the other hand, the pixel electrode X 'and the first electrode Y1' are disposed on the photo sensing unit W ', and since the pixel electrode X' and the first electrode Y1 'are close to each other to generate a coupling capacitance to form an electric field, the liquid crystal molecules on the photo sensing unit W' are controlled to deflect. When the liquid crystal molecules on the light sensing unit W' are deflected, as shown in fig. 1, the light inside the liquid crystal cell may be reflected and then exit through the collimating holes, resulting in poor display.
Therefore, the inventor improves the prior art to provide a display panel, fig. 2 is a schematic top view of the display panel provided by the present invention, and fig. 3 is a schematic cross-sectional view of an alternative embodiment of the display panel at a position of a tangent line a-a' in fig. 2.
As shown in fig. 2, the display panel includes: the display area AA includes a plurality of pixels P arranged in an array, the pixels P include at least three sub-pixels sp, and fig. 2 illustrates an example in which one pixel P includes three sub-pixels sp. Alternatively, one pixel P includes three color sub-pixels of red, green and blue, or one pixel P includes four color sub-pixels of red, green, blue and white, and the sub-pixel sp includes a pixel electrode X (refer to the schematic diagram in fig. 3).
As shown in fig. 2, the display area AA of the present invention is divided into a plurality of sub-pixels sp, and the sub-pixels sp defined in the present invention include an opening area Q and a non-opening area FQ surrounding the opening area Q, wherein the opening area Q is a light-transmitting area, i.e., a light-emitting area of the sub-pixels sp. The pixel P comprises a fingerprint pixel ZP, the fingerprint pixel ZP comprises a fingerprint identification unit ZY, the fingerprint identification unit ZY comprises a collimation hole K and a light sensing unit W (not shown in figure 2), and the collimation hole K and the light sensing unit W are overlapped in the direction vertical to the display panel. The fingerprint identification unit ZY is at least positioned in one sub-pixel sp; that is, in the display panel provided by the present invention, the fingerprint identification unit ZY may be located in one sub-pixel sp (as illustrated in fig. 2), may be located in two sub-pixels sp, or may be located in three sub-pixels sp, and the size of the fingerprint identification unit may be set according to the fingerprint detection requirement and the size of the sub-pixels of the display panel in practice.
Optionally, all pixels in the display panel provided by the invention are fingerprint pixels ZP, that is, the entire display area AA can realize fingerprint identification; alternatively, as shown in fig. 2, only a part of the pixels are fingerprint identification pixels ZP, so as to realize fingerprint identification of a part of the display area.
As shown in fig. 3, in the fingerprint pixel ZP: in the direction e perpendicular to the display panel, the alignment holes K overlap the light sensing units W, and the light sensing units W do not overlap the pixel electrodes X. As shown in the figure, the present invention further includes a collimating layer ZZ (the number and the position of the collimating layers are only schematic in the figure), a gap is disposed in the collimating layer ZZ, and the gaps of at least two collimating layers ZZ are overlapped to form a collimating hole K, and the collimating hole K in the present invention can limit the light reflected by the finger from reaching the light sensing unit W through the collimating hole K.
Referring to fig. 3, the display panel provided by the present invention is a liquid crystal display panel, and the display panel includes an array substrate 101 and a color filter substrate 102 that are oppositely disposed, and a liquid crystal layer 103 disposed between the array substrate 101 and the color filter substrate 102, and a color resistor 1021 in the color filter substrate 102 is illustrated in the figure. Optionally, the light sensing unit W is a photodiode, and includes a p-type semiconductor portion and an n-type semiconductor portion, in order to meet the conductive requirement of the light sensing unit W, a first electrode Y1 is further disposed in the display panel, and the first electrode Y1 is connected to the light sensing unit W in a contact manner, where a detailed structure of the photodiode is not shown in the figure. The pixel electrode X is connected to a pixel switching tube (i.e., a thin film transistor) T of the array substrate 101, the pixel switching tube T is used as a switching control unit of the sub-pixel, the structure of the pixel switching tube T is only schematically shown in the figure, and the pixel switching tube T in the present invention may have a top gate structure or a bottom gate structure as shown in the figure. In order to ensure the light transmittance of the upper region of the light sensing unit W and to realize the electrical connection between the first electrode Y1 and the light sensing unit W, the film structure (J3) between the light sensing unit W and the first electrode Y1 is removed to form a groove C (i.e., a portion of the film on the light sensing unit W is removed) on the light sensing unit W, the first electrode Y1 is connected to the light sensing unit W in the groove, an insulating film between the first electrode Y1 and the pixel electrode X is formed, and the pixel electrode X is formed. The alignment holes K are disposed corresponding to the light sensing units W, and the alignment holes K are disposed not to overlap with the pixel electrodes X, i.e., the pixel electrodes X are not disposed in the corresponding areas above the light sensing units W. That is, the pixel electrode X of the present invention does not need to cross the groove C above the photo-sensing unit W.
Optionally, a light-shielding layer LS is further disposed in the present invention, where the light-shielding layer LS may shield light outside the display panel, for example, light from a side of the array substrate 101 away from the color film substrate 102, and when the display panel is applied to a display device, the light-shielding layer LS may shield light of a backlight, so as to prevent leakage current from occurring in the light-sensitive switch D1 due to the light directly irradiating the light-sensitive unit W.
According to the display panel provided by the invention, the pixels comprise fingerprint pixels, the fingerprint pixels comprise fingerprint identification units, and the light sensing units in the fingerprint identification units are arranged in the fingerprint pixels and are not overlapped with the pixel electrodes. The pixel electrode does not need to cross the groove on the light sensing unit when the display panel is manufactured, so that the risk of line breakage caused by crossing the groove by the pixel electrode can be avoided; meanwhile, the light sensing units are not overlapped with the pixel electrodes, namely the alignment holes are not overlapped with the pixel electrodes, so that electric fields formed after the pixel electrodes and the first electrodes are respectively applied with voltage do not exist in the corresponding areas of the alignment holes, liquid crystal molecules in the areas cannot deflect, light rays reflected by the areas where the light sensing units are located cannot penetrate through the liquid crystal molecule layers and are emitted out of the display panel through the alignment holes, and the problem of poor display is solved.
With continued reference to fig. 2, the sub-pixel sp includes an open area Q and a non-open area FQ surrounding the open area Q, and the fingerprint identification unit ZY is located at the non-open area FQ. And a black matrix is arranged in the color film substrate, the black matrix is made of shading materials, and a plurality of openings arranged on the black matrix correspond to the opening areas Q of the sub-pixels sp. The fingerprint identification unit ZY comprises a collimation hole and a light sensation unit, a collimation layer is required to be arranged in a film layer structure of a display panel when the collimation hole is manufactured, a gap arranged on the collimation layer forms the collimation hole, and when fingerprint identification is carried out, light reflected by a finger fingerprint is required to be ensured to penetrate through the collimation hole and irradiate onto the light sensation unit, so that an area around the collimation hole is required to be arranged to have a lightproof performance.
In one embodiment, and with continued reference to FIG. 2, the fingerprinting unit ZY is located in one sub-pixel sp in the present invention. In this embodiment, one pixel P includes three sub-pixels sp, and since the fingerprint pixel ZP is provided with the fingerprint identification unit ZY, the fingerprint identification unit ZY occupies a part of the space of the sub-pixel sp, which results in that the area of the opening area Q of the sub-pixel sp where the fingerprint identification unit ZY is located is reduced. Optionally, in the present invention, the opening areas of the sub-pixels sp in the fingerprint pixel ZP are set to have the same size, that is, the opening areas of the sub-pixels sp with different colors in the fingerprint pixel ZP have the same size, so as to ensure the color display effect after the sub-pixels with different colors are mutually matched.
In an embodiment, fig. 4 is a schematic top view of an alternative embodiment of a display panel provided in the present invention. As shown in fig. 4, the fingerprint identification unit ZY is located in two sub-pixels sp, and the light sensing unit corresponding to the fingerprint identification unit ZY is not overlapped with the pixel electrodes of the two sub-pixels sp, which is illustrated by one pixel P including three sub-pixels sp. Optionally, in this embodiment, the opening areas of the sub-pixels sp in the fingerprint pixel ZP are set to have the same size, so as to ensure the color display effect after the sub-pixels with different colors are matched with each other.
In an embodiment, fig. 5 is a schematic top view of an alternative implementation of a fingerprint pixel in a display panel according to the present invention. The display panel comprises a substrate, the sub-pixels further comprise pixel switch tubes, and the pixel electrodes are electrically connected with the pixel switch tubes; in a fingerprint pixel: the orthographic projection of the light sensing unit on the substrate is a first projection, the projection of the pixel electrode on the substrate is a second projection, the projection of the pixel switch tube on the substrate is a third projection, and the second projection is located between the first projection and the third projection. As shown in fig. 5, the fingerprint recognition unit ZY is only shown in one sub-pixel, and the pixel electrode X is electrically connected to the pixel switch tube T. In a plan view from a top view, the light sensing unit W coincides with its projection on the substrate, the pixel electrode X coincides with its projection on the substrate, and the pixel switch tube T coincides with its projection on the substrate, so in this embodiment, as illustrated in fig. 5, the pixel electrode X is located between the light sensing unit W and the pixel switch tube T from a top view. One pixel electrode X corresponds to one sub-pixel, and fig. 5 illustrates that only one fingerprint pixel includes three sub-pixels. In the embodiment, the pixel electrode X is located between the light sensing unit W and the pixel switching tube T from a top view, that is, the light sensing unit and the pixel electrode are not overlapped, and when the pixel electrode is connected to the pixel switching tube, a groove crossing over the light sensing unit as in the related art is not needed, so that the risk of wire breakage of the pixel electrode due to crossing over the groove can be avoided; meanwhile, the light sensing units are not overlapped with the pixel electrodes, namely the alignment holes are not overlapped with the pixel electrodes, so that electric fields formed after the pixel electrodes and the first electrodes are respectively applied with voltage do not exist in the corresponding areas of the alignment holes, liquid crystal molecules in the areas cannot deflect, light rays reflected by the areas where the light sensing units are located cannot penetrate through the liquid crystal molecule layers and are emitted out of the display panel through the alignment holes, and the problem of poor display is solved.
In an embodiment, fig. 6 is a schematic top view of another alternative implementation of the display panel provided in the present invention. As shown in fig. 6, the light sensing unit W is schematically located between two pixel electrodes X, and this embodiment mode has a fingerprint pixel ZP and a non-fingerprint pixel FZP in the display panel. Optionally, in some high-pixel-density display panels, fingerprint pixels and non-fingerprint pixels may be included, so that the setting density of the pixels can be ensured, and meanwhile, fingerprint identification of a full-screen can be realized.
In an embodiment, fig. 7 is a schematic top view of another alternative implementation of the display panel provided in the present invention. Fig. 8 is a schematic cross-sectional view taken along line B-B' of fig. 7. Fig. 9 is a schematic top view of another alternative embodiment of a display panel provided in the present invention.
As shown in fig. 7, the display panel includes a semiconductor active layer 11, the semiconductor active layer 11 including an active subsection 11 w; the active layer of the pixel switch tube T is located in the active subsection 11w, in the direction perpendicular to the display panel, at least in the fingerprint pixel ZP, at least a part of the active subsection 11w overlaps with the pixel electrode X, the display panel further includes a scan line G and a data line D, the scan line G provides a scan signal for the sub-pixel, wherein the area overlapping with the scan line G in the active subsection 11w is the active layer (not shown). Fig. 7 is a schematic view from a top view, i.e. from a direction perpendicular to the display panel. Fig. 7 shows the light-sensing unit W. As shown in fig. 8, the photo sensing unit W is a photodiode, and the core component thereof is a PN junction, which is formed by an N-type doped region (i.e., N-type semiconductor portion W1) and a P-type doped region (i.e., P-type semiconductor portion W2) in close contact. The N-type semiconductor portion W1 is located on the semiconductor active layer 11, i.e. the N-type semiconductor portion W1 and the active layer of the pixel switch tube T are fabricated in the same etching process, and when the same film is fabricated, different elements have a certain spacing due to process limitations (as shown in fig. 7, the spacing distance H between the light sensing unit W and the active sub-portion 11W is illustrated).
As shown in fig. 9, in this embodiment, the active subsection 11w overlaps the pixel electrode X. Also due to process limitations, the photo-sensing cells W are spaced apart from the active segments 11W by a distance H. As can be seen from comparing fig. 9 and 7, the arrangement of at least a part of the active segment 11w in the embodiment of fig. 7 overlapping the pixel electrode X can save the space of the non-opening area FQ (opaque area) in the direction f. It should be noted that the semiconductor active layer 11 has a semitransparent characteristic, and after the active subsection 11w is overlapped with the pixel electrode X, the deflection of the liquid crystal molecules on the active subsection 11w is not affected, so the light emission of the region is not affected, that is, the design of the present invention has no effect on the display of the opening region of the pixel, and simultaneously, the area of the non-opening region can be reduced, which is beneficial to improving the aperture ratio.
The shape of the active portion 11w in fig. 7 is shown only schematically, and the shape of the active portion may be L-shaped or linear, and is not shown here.
In an embodiment, fig. 10 is a schematic top view of another alternative embodiment of a display panel provided in the present invention. As shown in fig. 10, the fingerprint pixel further includes a fingerprint control unit ZY, the fingerprint control unit ZY is located in one sub-pixel sp, the fingerprint control unit ZY includes at least one fingerprint switch tube ZT, and the fingerprint switch tube ZT is electrically connected with the light sensing unit W. This embodiment sets up fingerprint control unit ZY in a sub-pixel, can have the relative position as shown in the figure with light sense unit electricity W, and light sense unit electricity W and fingerprint control unit ZY can all set up non-opening area when making, and this kind of design can realize the rational utilization to fingerprint pixel inner space, and the opening area of each sub-pixel in guaranteeing the fingerprint pixel equals to guarantee the color display effect after each different colour sub-pixel mutually supports.
Continuing to refer to FIG. 10, the display area further includes: at least one control line 22, at least one signal line 33; the control end of the fingerprint switch tube ZT is electrically connected with the control line 22, the first end of the fingerprint switch tube ZT is electrically connected with the signal line 33, and the second end of the fingerprint switch tube ZT is electrically connected with the light sensing unit W. The fingerprint switch tube ZT is used as a transistor, the control terminal of the fingerprint switch tube ZT is the grid electrode of the transistor, and the first terminal and the second terminal are respectively a source terminal or a drain terminal. After the effective level signal is input to the control line 22, the fingerprint switch tube ZT can be controlled to be opened, so that the light sensing unit W receives the light signal and then converts the light signal into a fingerprint electric signal, and the fingerprint electric signal is transmitted to the second end, and then the fingerprint electric signal is transmitted to the signal line 33 through the first end to be used for fingerprint identification and detection.
As shown in fig. 10, the display panel further includes a plurality of scan lines G and a plurality of data lines D; optionally, the control line 22 and the scan line G are located on the same layer, and the signal line 33 and the data line D are located on the same layer. In the embodiment, the control lines and the scanning lines are arranged on the same layer, and can be manufactured in the same process with the scanning lines during manufacturing, the signal lines and the data lines are arranged on the same layer, and can be manufactured in the same process with the data lines during manufacturing, namely, the manufacturing of the control lines and the data lines is multiplexed with the original process in the display panel, and the process is relatively simple.
Fig. 11 is a schematic cross-sectional view of an alternative embodiment taken at line a-a' of fig. 2. As shown in fig. 11, the display panel includes a substrate 1011 and a semiconductor active layer 11 on the substrate 1011; a first metal layer M1 located on the semiconductor active layer 11 side away from the substrate 1011, and the control lines 22 and the scan lines G are located on the first metal layer M1; the second metal layer M2 is located on the side of the first metal layer M1 away from the semiconductor active layer 11, and the signal line 33 and the data line D are located on the second metal layer M2. Alternatively, as shown in the figure, the active layer of the pixel transistor T is located on the semiconductor active layer 11, the gate is located on the first metal layer M1, and the source and drain are located on the second metal layer M2. The control line, the scanning line, the signal line and the data line can multiplex the manufacturing process of the transistor during manufacturing, and the manufacturing process is simplified.
In one embodiment, FIG. 12 is a cross-sectional view of an alternative embodiment taken at line A-A' of FIG. 2. As shown in fig. 12, the collimating holes include at least a first collimating hole K1 and a second collimating hole K2, and the first collimating hole K1 and the second collimating hole K2 overlap in the direction perpendicular to the display panel e; the display panel comprises a collimation layer, the collimation layer comprises a first collimation layer ZZ1 and a second collimation layer ZZ2, a first collimation hole K1 is positioned in the first collimation layer ZZ1, and a second collimation hole K2 is positioned in the second collimation layer ZZ 2; the display panel comprises an array substrate 101 and a color film substrate 102 which are oppositely arranged, wherein a first collimation layer ZZ1 is positioned on the color film substrate 102, and a second collimation layer ZZ2 is positioned on the array substrate 101. In the invention, at least one collimation layer is respectively arranged on one side of the array substrate and one side of the color film substrate to realize the manufacture of collimation holes, and the light rays reflected by fingerprints are ensured to be limited in the collimation holes and emitted to the light sensation units. Optionally, 3 or 4 collimating layers may be provided in the present invention, and the actual manufacturing process may be designed according to specific requirements.
In order to ensure that the light rays of the fingerprint detection penetrate through the collimating holes and then are emitted to the light sensing units, and the periphery of the collimating holes is required to have light shielding performance, the collimating layers are arranged and made of light shielding materials, so that the light shielding performance of the periphery of the collimating holes is realized.
Optionally, with reference to fig. 12, the color filter substrate 102 includes a black matrix BM, and the first alignment layer ZZ1 is on the same layer as the black matrix BM. The black matrix can be multiplexed into the first collimating layer during manufacturing, an opening is required to be arranged on the black matrix to form a light-transmitting area (namely an opening area) of the sub-pixel during manufacturing, and the first collimating hole and the opening on the black matrix can be manufactured in the same process, so that the process is simplified.
Fig. 13 is a schematic view of a display device according to the present invention. As shown in fig. 13, the display device includes a display panel 100 provided in any embodiment of the present invention. The display device provided by the embodiment of the invention can be any electronic product with a display function, including but not limited to the following categories: the mobile terminal comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, a mobile phone, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:
according to the display panel provided by the invention, the pixels comprise fingerprint pixels, the fingerprint pixels comprise fingerprint identification units, and the light sensing units in the fingerprint identification units are arranged in the fingerprint identification pixels and are not overlapped with the pixel electrodes. The pixel electrode does not need to cross the groove on the light sensing unit when the display panel is manufactured, so that the risk of line breakage caused by crossing the groove by the pixel electrode can be avoided; meanwhile, the light sensing units are not overlapped with the pixel electrodes, namely the alignment holes are not overlapped with the pixel electrodes, so that electric fields formed after the pixel electrodes and the first electrodes are respectively applied with voltage do not exist in the corresponding areas of the alignment holes, liquid crystal molecules in the areas cannot deflect, light rays reflected by the areas where the light sensing units are located cannot penetrate through the liquid crystal molecule layers and are emitted out of the display panel through the alignment holes, and the problem of poor display is solved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (12)
1. A display panel, comprising:
the display device comprises a display area, a pixel electrode and a control circuit, wherein the display area comprises a plurality of pixels arranged in an array, the pixels comprise at least three sub-pixels, and the sub-pixels comprise pixel electrodes;
the pixel comprises a fingerprint pixel, the fingerprint pixel comprises a fingerprint identification unit, the fingerprint identification unit comprises an alignment hole and a light sensing unit, the alignment hole is overlapped with the light sensing unit in the direction perpendicular to the display panel, and the fingerprint identification unit is at least positioned in one sub-pixel;
in the fingerprint pixels: in the direction perpendicular to the display panel, the light sensing units are not overlapped with the pixel electrodes;
the fingerprint pixel further comprises a fingerprint control unit, the fingerprint control unit is located in one of the sub-pixels and comprises at least one fingerprint switch tube, and the fingerprint switch tube is electrically connected with the light sensing unit.
2. The display panel according to claim 1,
the fingerprint identification unit is located in one of the sub-pixels.
3. The display panel according to claim 1 or 2,
comprises a substrate; the sub-pixel also comprises a pixel switch tube, and the pixel electrode is electrically connected with the pixel switch tube;
in the fingerprint pixels: the orthographic projection of the light sensing unit on the substrate is a first projection, the projection of the pixel electrode on the substrate is a second projection, the projection of the pixel switch tube on the substrate is a third projection, and the second projection is located between the first projection and the third projection.
4. The display panel according to claim 3,
the display panel includes a semiconductor active layer including an active subsection;
the active layer of the pixel switch tube is located at the active subsection, and at least part of the active subsection overlaps with the pixel electrode in the direction perpendicular to the display panel and at least in the fingerprint pixel.
5. The display panel according to claim 1,
the display area further includes: at least one control line, at least one signal line;
the control end of the fingerprint switch tube is electrically connected with the control wire, the first end of the fingerprint switch tube is electrically connected with the signal wire, and the second end of the fingerprint switch tube is electrically connected with the light sensing unit.
6. The display panel according to claim 5,
the display panel also comprises a plurality of scanning lines and a plurality of data lines;
the control line and the scanning line are located on the same film layer, and the signal line and the data line are located on the same film layer.
7. The display panel according to claim 6, further comprising:
a substrate and a semiconductor active layer located over the substrate;
the first metal layer is positioned on one side, far away from the substrate, of the semiconductor active layer, and the control lines and the scanning lines are positioned on the first metal layer;
and the second metal layer is positioned on one side of the first metal layer, which is far away from the semiconductor active layer, and the signal line and the data line are positioned on the second metal layer.
8. The display panel according to claim 1,
the collimating holes at least comprise a first collimating hole and a second collimating hole, and the first collimating hole and the second collimating hole are overlapped in the direction perpendicular to the display panel;
the display panel comprises a collimation layer, the collimation layer comprises a first collimation layer and a second collimation layer, the first collimation hole is positioned in the first collimation layer, and the second collimation hole is positioned in the second collimation layer;
the display panel comprises an array substrate and a color film substrate which are arranged oppositely, the first collimation layer is located on the color film substrate, and the second collimation layer is located on the array substrate.
9. The display panel according to claim 8,
the collimation layer is made of shading materials.
10. The display panel according to claim 8,
the color film substrate comprises a black matrix, and the first collimation layer and the black matrix are on the same layer.
11. The display panel according to claim 1,
the sub-pixel includes an open area and a non-open area surrounding the open area, and the fingerprint identification unit is located in the non-open area.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 11.
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| CN201910247589.8A CN110008885B (en) | 2019-03-29 | 2019-03-29 | Display panel and display device |
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| CN201910247589.8A CN110008885B (en) | 2019-03-29 | 2019-03-29 | Display panel and display device |
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| CN110008885B true CN110008885B (en) | 2021-04-30 |
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| CN110426891B (en) * | 2019-07-31 | 2022-02-22 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110543847B (en) | 2019-08-29 | 2021-04-02 | 维沃移动通信有限公司 | Display module and electronic equipment |
| CN113544762B (en) * | 2019-09-27 | 2023-07-25 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN110596979B (en) * | 2019-09-27 | 2022-07-08 | 厦门天马微电子有限公司 | Array substrate and display device |
| TWI754398B (en) * | 2019-10-09 | 2022-02-01 | 聯詠科技股份有限公司 | Fingerprint recognition apparatus |
| US20220004734A1 (en) * | 2019-10-09 | 2022-01-06 | Novatek Microelectronics Corp. | Fingerprint recognition apparatus |
| CN110632781B (en) * | 2019-10-30 | 2022-06-17 | 厦门天马微电子有限公司 | Display panel, display device and display panel manufacturing method |
| CN110750021B (en) * | 2019-10-31 | 2022-04-12 | 厦门天马微电子有限公司 | Array substrate, display panel and display device |
| CN110750020B (en) | 2019-10-31 | 2022-10-18 | 厦门天马微电子有限公司 | Display module and display device |
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