CN108649049B - Display panel and display device - Google Patents
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- CN108649049B CN108649049B CN201810356228.2A CN201810356228A CN108649049B CN 108649049 B CN108649049 B CN 108649049B CN 201810356228 A CN201810356228 A CN 201810356228A CN 108649049 B CN108649049 B CN 108649049B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
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Abstract
The invention discloses a display panel and a display device, comprising: the array substrate comprises a substrate and a plurality of display units positioned on the substrate; the display unit comprises three sub-display units, wherein the three sub-display units are respectively a first color sub-display unit, a second color sub-display unit and a third color sub-display unit; the fingerprint identification unit comprises a semi-transparent area and a non-transparent area; the array substrate comprises a plurality of same display unit areas; the number of the first color sub-display units provided with the fingerprint identification units in the display unit area is N1, the number of the second color sub-display units provided with the fingerprint identification units is N2, and the number of the third color sub-display units provided with the fingerprint identification units is N3; wherein N1 is N3-N2, and N1, N2 and N3 are all positive integers greater than or equal to 1. The overall chromaticity uniformity of the display panel is improved, and the display effect of the display panel is improved.
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
Fingerprints are unique to each individual. 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. Therefore, before the user operates the display device with the fingerprint identification function, the user only needs to touch the fingerprint identification unit of the display device with a finger to carry out authority identification, and the authority identification process is simplified.
In order to improve the screen occupation ratio of the display panel, the structures of the fingerprint identification units arranged in the display area of the display panel are more and more, when the fingerprint identification units are arranged on the upper part of the display unit of the display panel, the fingerprint identification units can partially shield the sub-display units, and if one fingerprint identification unit is arranged on each sub-display unit, the aperture opening ratio of the display panel can be influenced; if only the fingerprint recognition unit is disposed on a specific sub-display unit, the display panel will display non-uniformly.
Disclosure of Invention
In view of the foregoing, the present invention provides a display panel and a display device.
In a first aspect, an embodiment of the present invention provides a display panel, including: the array substrate comprises a substrate and a plurality of display units positioned on the substrate; a plurality of the display units are arranged in a matrix along a first direction and a second direction; the display unit comprises three sub-display units, the three sub-display units are respectively a first color sub-display unit, a second color sub-display unit and a third color sub-display unit, and the three sub-display units are arranged along the first direction; the first direction and the second direction intersect; the fingerprint identification unit is positioned on one side of the display unit, which is far away from the substrate base plate; the fingerprint identification unit comprises a semi-transparent area and a non-transparent area; the vertical projection of the semi-transparent area of the fingerprint identification unit on the array substrate is at least partially positioned in the sub-display units, and the vertical projection of the non-transparent area on the array substrate is positioned between the sub-display units and the sub-display units which are arranged adjacent to the sub-display units along the first direction or the second direction; the array substrate comprises a plurality of same display unit areas, the display units are arranged in the display unit areas, and each display unit area comprises at least three display units which are sequentially arranged along the second direction; the number of the first color sub-display units provided with the fingerprint identification units in the display unit area is N1, the number of the second color sub-display units provided with the fingerprint identification units is N2, and the number of the third color sub-display units provided with the fingerprint identification units is N3; wherein N1 is N3-N2, and N1, N2 and N3 are all positive integers greater than or equal to 1.
In a second aspect, an embodiment of the present invention provides a display device, including a display panel, where the display panel is the display panel provided in this application.
Compared with the prior art, the invention at least realizes the following beneficial effects:
array substrate includes a plurality of the same display element districts among the display panel, the condition of arranging on the sub-display element of fingerprint identification unit in every display element district is the same, make fingerprint identification unit be the regularity and arrange in display panel, the number that is equipped with the first colour sub-display element of fingerprint identification unit in every display element district is the same with the number that is equipped with the third colour sub-display element of fingerprint identification unit, and its equal less than or equal to is equipped with the number of the second colour sub-display element of fingerprint identification unit, first colour sub-display element in the display element district has been guaranteed, it is even to give out light between second colour sub-display element and the third colour sub-display element, thereby the holistic colourity homogeneity of display panel has been promoted, display panel's display effect has been promoted.
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 schematic plan view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along A-A of the display panel of FIG. 1;
FIG. 3 is a schematic plan view of another display panel provided in an embodiment of the present invention;
FIG. 4 is a schematic plan view of another display panel provided in an embodiment of the present invention;
FIG. 5 is a schematic plan view of another display panel provided in an embodiment of the present invention;
FIG. 6 is a schematic plan view of another display panel provided in an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a fingerprint identification unit according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a film layer of a fingerprint identification unit according to an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a display device according to an embodiment of 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 schematic plan view of a display panel according to an embodiment of the present invention, fig. 2 is a schematic cross-sectional view of the display panel in fig. 1 along a-a, and referring to fig. 1 and fig. 2, the present invention provides a display panel including:
the display device comprises an array substrate 10, wherein the array substrate 10 comprises a substrate 110 and a plurality of display units 120 positioned on the substrate 110; the plurality of display units 120 are arrayed in the first direction X and the second direction Y; the display unit 120 includes three sub-display units 130, the three sub-display units 130 are respectively a first color sub-display unit 131, a second color sub-display unit 132 and a third color sub-display unit 133, and the three sub-display units 130 are arranged along a first direction X; the first direction X and the second direction Y intersect;
the fingerprint identification unit 20, the fingerprint identification unit 20 is located on the side of the display unit 120 far away from the substrate base plate 110; the fingerprint recognition unit 20 includes a semi-transmissive region 210 and a non-transmissive region 220;
the vertical projection of the semi-transparent region 210 of the fingerprint identification unit 20 on the array substrate 10 is at least partially located in the sub-display unit 130, and the vertical projection of the non-transparent region 220 on the array substrate 10 is located between the sub-display unit 130 and the sub-display unit 130 arranged adjacent to the sub-display unit in the first direction X or the second direction Y;
the array substrate 10 includes a plurality of identical display unit regions 140, the display units 120 are disposed in the display unit regions 140, and each display unit region 140 includes at least three display units 120 sequentially arranged along the second direction Y;
the number of the first color sub display units 131 provided with the fingerprint recognition units 20 in the display unit area 140 is N1, the number of the second color sub display units 132 provided with the fingerprint recognition units 20 is N2, and the number of the third color sub display units 133 provided with the fingerprint recognition units 20 is N3; wherein the content of the first and second substances,
n1 is N3-N2, and N1, N2 and N3 are all positive integers greater than or equal to 1.
Specifically, with reference to fig. 1 and fig. 2, the sub-display units 130 are arranged in an array on the substrate 110 along a first direction X and a second direction Y, wherein a black matrix is disposed around the sub-display unit 130 in the display panel, so that a light-emitting region and a non-light-emitting region are formed in the display panel, a region of the display panel corresponding to the sub-display unit 130 is the light-emitting region of the display panel, and a region between two adjacent sub-display units 130 is the non-light-emitting region of the display panel. The semi-transparent region 210 in the fingerprint identification unit 20 is a photosensitive region, which may be made of polysilicon, the current passing through the polysilicon material is positively correlated to the light intensity, and is made of a semi-transparent material, so it can transmit light, and has little influence on the transmittance of the display panel, the semi-transparent region 210 is a portion of the fingerprint identification unit 20 receiving the light signal, and is used to convert the light reflected by the finger fingerprint into an electrical signal, the semi-transparent region 210 may be a photodiode, the vertical projection of the semi-transparent region 210 in the fingerprint identification unit 20 on the array substrate 10 is located in the sub-display unit 130, fig. 1 only shows the case that the vertical projection of the semi-transparent region 210 in the fingerprint identification unit 20 on the array substrate 10 is located in the sub-display unit 130, and the vertical projection of the semi-transparent region 210 on the array substrate 10 is not limited to be located in the sub-display unit 130. The non-transparent region 220 may be made of graphite-doped resin, and is designed to be opaque, and is used to place metal traces, where the metal traces are opaque and, if placed in the semi-transparent region 210, may affect the display of the display panel, so that, when placed in the non-transparent region 220, the non-transparent region 220 is opaque, so as not to affect the transmittance of the display panel, the vertical projection of the non-transparent region 220 on the array substrate 10 may be located in the non-light-emitting region of the display panel, specifically, the vertical projection of the non-transparent region 220 on the array substrate 10 may be located between the sub-display unit 130 and the sub-display unit 130 arranged adjacent thereto along the first direction X (e.g., the non-light-transparent region 221) or may be located between the sub-display unit 130 and the sub-display unit 130 arranged adjacent thereto along the second direction Y (e.g., the non-light-transparent region 222), where the vertical projection of the non-transparent region 220 on, it is only necessary to satisfy the non-light emitting region of the display panel.
The vertical projection of the semi-transparent region 210 of the fingerprint identification unit 20 on the array substrate 10 is at least partially located in the sub-display units 130, and the semi-transparent region 210 affects the aperture ratios of the corresponding sub-display units 130. It can be understood that, at least a part of the projection of the fingerprint identification semi-transparent area on the array substrate is located on the display unit, so that the aperture ratio of the corresponding display unit is reduced, and especially, in some existing display panels, the number of the display units with relatively low brightness under the same gray scale is greater than the number of the display units with relatively high brightness under the same gray scale, which is provided with the fingerprint identification unit, the aperture ratio of the display units with relatively low brightness is reduced more, the display panel is bluish when emitting light, and the white point chromaticity of the display panel is deviated all the time, which affects the display effect.
Similarly, in the array substrate provided by the present application, the relative brightness of the second color sub-display unit 132 at the same gray scale is not lower than that of the first color sub-display unit 131 and the three color sub-display units, and the relative brightness difference between the first color sub-display unit 131 and the three color sub-display units at the same gray scale is not large. The array substrate 10 provided by the present application includes a plurality of identical display unit regions 140, the arrangement of the fingerprint identification units 20 on the sub-display units 130 in each display unit region 140 is identical, such that the fingerprint identification units 20 are arranged regularly in the display panel, if the relative brightness of the second color sub-display unit 132 at the same gray scale is not different from that of the first color sub-display units 131 and the third color sub-display units, when the number of the first color sub-display units 131 of the fingerprint identification unit 20, the number of the third color sub-display units 133 provided with the fingerprint identification unit 20, and the number of the second color sub-display units 132 provided with the fingerprint identification unit 20 in each display unit region 140 are the same, the respective total aperture ratios of the first color sub-display units 131, the second color sub-display units 132, and the third color sub-display units 133 in the display panel are identical, the uniformity of light emission among the first color sub-display unit 131, the second color sub-display unit 132 and the third color sub-display unit 133 in the display unit area 140 can be improved, thereby improving the overall chromaticity uniformity of the display panel; further, in general, the relative brightness of the second color sub-display unit 132 in the display panel at the same gray scale is greater than that of the first color sub-display unit 131 and the third color sub-display unit 133, so that the number of the first color sub-display units 131 provided with the fingerprint identification unit 20 and the number of the third color sub-display units 133 provided with the fingerprint identification unit 20 in each display unit area 140 are the same, and are both less than that of the second color sub-display units 132 provided with the fingerprint identification unit 20, and then the total aperture ratios of the first color sub-display units 131 and the third color sub-display units 133 in the display panel are the same, and are both greater than that of the second color sub-display units 132, so that the light emission among the first color sub-display units 131, the second color sub-display units 132, and the third color sub-display units 133 in the display unit area 140 is uniform, and the effect of uniformity of the display panel is improved, the display effect of the display panel is improved.
Fig. 1 only shows that six display units 120 are included in each display unit area 140, and the fingerprint identification unit 20 is disposed on two sub-display units 130 in the display unit 120, and here, the display unit area 140 is not limited to include six display units 120, and the fingerprint identification unit 20 is disposed on two sub-display units 130 in the display unit 120.
Fig. 3 is a schematic plan view of another display panel according to an embodiment of the present invention, referring to fig. 3, in which, optionally, a fingerprint identification unit 20 is disposed on one sub-display unit 130 of the display unit 120.
Specifically, with reference to fig. 3, the array substrate 10 includes a plurality of same display unit areas 140, the display unit areas 140 include six display units 120 sequentially arranged along the second direction Y, and one sub-display unit 130 of the display units 120 is provided with the fingerprint identification unit 20, so that the density of the fingerprint identification unit 20 in the display panel is reasonable, and the fingerprint identification precision in the display panel is high; and the number of the first color sub-display units 131 provided with the fingerprint identification unit 20 in each display unit area 140 is the same as the number of the third color sub-display units 133 provided with the fingerprint identification unit 20, and the number of the second color sub-display units 132 provided with the fingerprint identification unit 20 is less than or equal to that of the first color sub-display units 131, the second color sub-display units 132 and the third color sub-display units 133 in each display unit area 140, so that the light emission is uniform among the first color sub-display units 131, the second color sub-display units 132 and the third color sub-display units 133 in each display unit area 140, the integral chromaticity uniformity of the display panel is improved, and the display effect. Fig. 1 only shows a case where six display units 120 are included in each display unit region 140, and the inclusion of six display units 120 in each display unit region 140 is not limited herein.
When the number of the sub-display units 130 provided with the fingerprint identification unit 20 in the display unit 120 is two or more, the density of the fingerprint identification unit 20 in the display panel is too high, which affects the aperture ratio of the display panel, thereby affecting the display effect of the display panel, and interference may be formed between the fingerprint identification units 20, thereby affecting the accuracy of fingerprint identification in the display panel. In the display unit area 140, there are display units 120, where the number of sub-display units 130 in which the fingerprint identification unit 20 exists is zero, the density of the fingerprint identification unit 20 in the display panel is too small, thereby affecting the accuracy of fingerprint identification in the display panel.
The embodiment of the present invention provides another display panel, wherein optionally, the first color sub-display unit 131 is a red sub-display unit, the second color sub-display unit 132 is a green sub-display unit, and the third color sub-display unit 133 is a blue sub-display unit, and in addition, the second color sub-display unit 132 may also be a white sub-display unit, so that the relative brightness of the second color sub-display unit 132 at the same gray scale is not lower than that of the first color sub-display unit 131 and the third color sub-display unit.
It should be noted that, those skilled in the art should understand that, in the present application, the first color sub-display unit 131 is a red sub-display unit, the second color sub-display unit 132 is a green sub-display unit, and the third color sub-display unit 133 is a blue sub-display unit, in other embodiments, the first color sub-display unit 131, the second color sub-display unit 132, and the third color sub-display unit 133 may also be other color sub-display units, which is not limited in this application and is determined in particular by actual conditions.
Fig. 4 is a schematic plan view of another display panel provided in an embodiment of the present invention, referring to fig. 4, wherein, optionally, three display units 120 are included in the display unit area 140; wherein the content of the first and second substances,
N1＝N2＝N3＝1。
specifically, with reference to fig. 4, the array substrate 10 includes a plurality of identical display unit regions 140, three display units 120 are included in the display unit regions 140, a fingerprint identification unit 20 is disposed on one sub-display unit 130 of the display units 120, and the number of the first color sub-display units 131 of the fingerprint identification unit 20, the number of the second color sub-display units 132 of the fingerprint identification unit 20, and the number of the third color sub-display units 133 of the fingerprint identification unit 20 are all one in each display unit region 140. The accuracy of fingerprint identification in the display panel is guaranteed through the arrangement, meanwhile, the light emission among the first color sub-display unit 131, the second color sub-display unit 132 and the third color sub-display unit 133 in each display unit area 140 in the display panel is uniform, the integral chromaticity uniformity of the display panel is improved, and the display effect of the display panel is improved.
Fig. 5 is a schematic plan view of another display panel provided in an embodiment of the present invention, referring to fig. 5, where, alternatively, N1: n2: n3 ═ 1: 2: 1.
specifically, with reference to fig. 5, the array substrate 10 includes a plurality of same display unit regions 140, at least four display units 120 sequentially arranged along the second direction Y are included in the display unit regions 140, a fingerprint identification unit 20 is disposed on one sub-display unit 130 of the display units 120, and the ratio between the number of the first color sub-display units 131 of the fingerprint identification unit 20, the number of the second color sub-display units 132 of the fingerprint identification unit 20, and the number of the third color sub-display units 133 of the fingerprint identification unit 20 in each display unit region 140 is 1: 2: 1. fig. 5 only shows a case where four display units 120 are included in the display unit area 140, and the display unit area 140 is not limited to include four display units 120, and may include eight display units 120.
The first color sub-display unit 131 is a red sub-display unit, the second color sub-display unit 132 is a green sub-display unit, and the third color sub-display unit 133 is a blue sub-display unit, and compared to the red sub-display unit and the blue sub-display unit, the luminance of the green sub-display unit is higher, the number of the second color sub-display units 132 provided with fingerprint identification in the display unit area 140 is greater than the number of the first color sub-display units 131 provided with fingerprint identification and the number of the third color sub-display units 133 provided with fingerprint identification, so that the light emission among the first color sub-display units 131, the second color sub-display units 132, and the third color sub-display units 133 in each display unit area 140 in the display panel is more uniform, the overall chromaticity uniformity of the display panel is improved, and the display effect of the display panel is improved.
With continued reference to fig. 5, the embodiment of the invention provides another display panel, optionally, wherein the display unit area 140 includes four display units 120; wherein the content of the first and second substances,
N1＝1，N3＝1，N2＝2。
specifically, with reference to fig. 5, the array substrate 10 includes a plurality of identical display unit regions 140, the display unit regions 140 include four display units 120 sequentially arranged along the second direction Y, a fingerprint identification unit 20 is disposed on one sub-display unit 130 of the display units 120, the number of the first color sub-display units 131 in each display unit region 140, which is provided with the fingerprint identification unit 20, is one, the number of the second color sub-display units 132, which are provided with the fingerprint identification unit 20, is two, and the number of the third color sub-display units 133, which are provided with the fingerprint identification unit 20, is one.
Four display units 120 are included in the display unit region 140; in the case where N1 is 1, N3 is 1, and N2 is 2, it is optional that two second color sub-display units 132 provided with the fingerprint identification unit 20 in the display unit area 140 are adjacently disposed in the second direction Y.
Fig. 6 is a schematic plan view of another display panel according to an embodiment of the present invention, referring to fig. 6, four display units 120 are included in a display unit area 140; in the case where N1 is 1, N3 is 1, and N2 is 2, it is optional that two second color sub display units 132 provided with the fingerprint identification unit 20 in the display unit area 140 are provided with one sub display unit 130 at an interval in the second direction Y.
Fig. 7 is a schematic structural diagram of a fingerprint identification unit according to an embodiment of the present invention, and fig. 8 is a schematic film layer diagram of a fingerprint identification unit according to an embodiment of the present invention, referring to fig. 7 and 8, optionally, wherein the fingerprint identification unit includes a photodiode D, a storage capacitor C, and a thin film transistor T;
the anode D1 of the photodiode D is electrically connected with the first electrode of the storage capacitor C, and the cathode D2 of the photodiode D is electrically connected with the second electrode of the storage capacitor C and the source Ts of the thin film transistor T; a grid electrode Tg of the thin film transistor T is electrically connected with a switch control line Gate, and a drain electrode Td is electrically connected with a signal detection line Data;
the photodiode D is used to convert light reflected by the touch subject into a current signal.
Optionally, the photodiode D includes a PIN junction D3 between the anode D1 and the cathode D2, wherein the PIN junction D3 is composed of a P-type semiconductor, an N-type semiconductor, and an intrinsic semiconductor (I-type layer) between the P-type semiconductor and the N-type semiconductor. The anode D1 of the photodiode D is located on the side of the PIN junction D3 away from the array substrate 10. PIN junction D3 has photosensitive properties and has unidirectional conductivity. In the absence of illumination, the PIN junction D3 has a small saturation reverse leakage current, i.e., dark current, when the photodiode D is turned off. When the PIN junction D3 is illuminated, the saturation reverse leakage current of the PIN junction D3 is greatly increased, and a photocurrent is formed and changes along with the change of the incident light intensity.
Specifically, the principle of fingerprint recognition will be described in detail with reference to fig. 2, 7 and 8. During the fingerprint recognition phase, the node H1 inputs a low voltage signal (e.g., a constant voltage signal having a magnitude of-5V), and the signal line Data inputs a high voltage signal (e.g., a constant voltage signal having a magnitude of 1.5V). The whole fingerprint identification stage comprises a preparation stage, a fingerprint signal acquisition stage and a fingerprint signal detection stage. In the preparation phase, a driving chip (not shown in fig. 2, 7 and 8) electrically connected to the fingerprint identification unit 20 controls the thin film transistor T of the fingerprint identification unit 20 to be turned on through the switch control line Gate, and the storage capacitor C is charged until the storage capacitor C is charged. In the fingerprint signal collection phase, the thin film transistor T of the fingerprint identification unit 20 is controlled to be turned off by using the switch control line Gate. When the user presses a finger on the display panel, light emitted from the sub-display unit 130 is irradiated onto the finger and reflected on the surface of the finger fingerprint to form reflected light. The reflected light formed by the reflection of the finger fingerprint is incident into the fingerprint identification unit 20, is received by the photodiode D of the fingerprint identification unit 20, and forms a photocurrent, the direction of which is from the node H2 to the node H1, so that the potential of H2 changes. In the fingerprint signal detection stage, the potential variation of the node H2 can be directly detected, so as to determine the magnitude of the photocurrent.
Optionally, in the fingerprint signal detection stage, the thin film transistor T of the fingerprint identification unit 20 may also be controlled to be turned on by using the switch control line Gate, and at this time, a potential difference exists between two electrodes of the storage capacitor C, and the storage capacitor C is in a charging state, and the magnitude of the photocurrent is determined by detecting the amount of charge charged in the storage capacitor C.
With continued reference to fig. 2, since the ridges 31 in the fingerprint of the finger pressed on the display panel are in contact with the surface of the display panel, and the valleys 32 are not in contact with the surface of the display panel, the reflectivity of the light rays impinging on the valleys 32 and the ridges 31 of the fingerprint is caused to be different, and further the intensity of the reflected light formed at the positions of the ridges 31 and the reflected light formed at the positions of the valleys 32 received by the fingerprint identification unit 20 is caused to be different, so that the magnitude of the photocurrent converted from the reflected light formed at the positions of the ridges 31 and the reflected light formed at the positions of the valleys 32 is different, and the fingerprint identification can be performed according to the magnitude of.
With continued reference to fig. 2, optionally, wherein the sub-display unit 130 provides a light source for the fingerprint identification unit 20;
the light emitted from the sub-display unit 130 is reflected by the touch subject to form reflected light, and the reflected light is incident to the fingerprint identification unit 20 for fingerprint identification.
Specifically, the sub-display unit 130 provides a light source for the fingerprint identification unit 20, and an additional light source is not required to be arranged in the fingerprint identification unit 20, so that the thickness of the display panel and the process steps of the display panel are reduced.
Optionally, the display panel is a liquid crystal display panel or an organic light emitting display panel.
It should be noted that, as will be understood by those skilled in the art, in other implementation manners of the present application, the display panel may also be a panel or a display component of a micro light emitting diode display (micro L ED), a Quantum Dot display (Q L ED, Quantum Dot L lighting Diodes), an electronic paper, and the like.
Fig. 9 is a schematic cross-sectional view of another display panel provided in an embodiment of the invention, referring to fig. 9, optionally, wherein the display panel further includes an encapsulation layer 40, and the encapsulation layer 40 is located on a side of the sub-display units 130 away from the substrate 110;
the fingerprint identification unit 20 is disposed on the encapsulation layer 40.
Specifically, with reference to fig. 9, the fingerprint identification unit 20 is disposed on the encapsulation layer 40, so that the fingerprint identification unit 20 is closer to the touch subject (finger), the propagation path of the light reflected by the touch subject from the touch subject to the fingerprint identification unit 20 is shorter, the loss of the light is less, the light can enter the fingerprint identification unit 20 more, and the fingerprint identification accuracy is improved.
With continued reference to fig. 9, optionally, wherein the encapsulation layer 40 is a transparent rigid cover 40a, the fingerprint identification unit 20 is disposed on a side of the transparent rigid cover 40a adjacent to the array substrate 10.
Specifically, the transparent rigid cover 40a is aligned and attached to the array substrate 10 after the fabrication, so the fingerprint identification unit 20 can be directly fabricated on the surface of the transparent rigid cover 40 a. Because the area between the transparent rigid cover plate 40a and the array substrate 10 is filled with air or nitrogen, the fingerprint identification unit 20 is disposed on one side of the transparent rigid cover plate 40a close to the array substrate 10, so that the thickness of the display panel is not increased by the fingerprint identification unit 20, and the development trend of the display panel is met.
Fig. 10 is a schematic cross-sectional view of another display panel according to an embodiment of the invention, referring to fig. 10, in which, alternatively, the packaging layer 40 is a thin film packaging layer 40b, and the fingerprint identification unit 20 is disposed on a side of the thin film packaging layer 40b away from the array substrate 10.
Specifically, the thin film encapsulation layer 40b may include a plurality of organic layers and inorganic layers disposed at intervals, and both the side of the thin film encapsulation layer 40b close to the array substrate 10 and the side of the thin film encapsulation layer far from the array substrate 10 are inorganic layers, so as to better realize the water and oxygen blocking effects. In addition, if the temperature of the manufacturing process of the fingerprint identification unit 20 is low, the manufacturing process does not affect other film layers of the display panel, and the fingerprint identification unit 20 may be directly manufactured on the surface of the thin film encapsulation layer 40 b. If the temperature of the manufacturing process of the fingerprint identification unit 20 is high and may affect the sub-display unit 130 during the manufacturing process, the fingerprint identification unit 20 may be manufactured on a substrate and attached to the film encapsulation layer 40b after the manufacturing process is completed.
Fig. 11 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention, referring to fig. 11, and optionally, the display panel further includes a second base plate 50 disposed opposite to the substrate base plate 110, wherein the second base plate 50 is closer to the touch surface of the touch main body than the substrate base plate 110;
the fingerprint identification unit 20 is disposed on the second substrate 50.
Fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 12, a display device 1000 according to an embodiment of the present invention is a mobile phone, where the display device 1000 includes the display panel 100 as described above, and furthermore, it can be understood by those skilled in the art that the display device 1000 of the present application may include other known structures besides the display panel 100. Such well-known structures will not be further described in order not to obscure the focus of the present application. The display device of the present application is not limited to the mobile phone shown in fig. 12, and may be a computer, a television, an electronic book, or the like.
According to the embodiment, the invention at least realizes the following beneficial effects:
array substrate includes a plurality of the same display element districts among the display panel, the condition of arranging on the sub-display element of fingerprint identification unit in every display element district is the same, make fingerprint identification unit be the regularity and arrange in display panel, the number that is equipped with the first colour sub-display element of fingerprint identification unit in every display element district is the same with the number that is equipped with the third colour sub-display element of fingerprint identification unit, and its equal less than or equal to is equipped with the number of the second colour sub-display element of fingerprint identification unit, first colour sub-display element in the display element district has been guaranteed, it is even to give out light between second colour sub-display element and the third colour sub-display element, thereby the holistic colourity homogeneity of display panel has been promoted, display panel's display effect has been promoted.
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 (16)
1. A display panel, comprising:
the array substrate comprises a substrate and a plurality of display units positioned on the substrate; a plurality of the display units are arrayed along a first direction and a second direction; the display unit comprises three sub-display units, the three sub-display units are respectively a first color sub-display unit, a second color sub-display unit and a third color sub-display unit, and the three sub-display units are arranged along the first direction; the first direction and the second direction intersect;
the fingerprint identification unit is positioned on one side of the display unit, which is far away from the substrate base plate; the fingerprint identification unit comprises a semi-transparent area and a non-transparent area;
the vertical projection of the semi-transparent area of the fingerprint identification unit on the array substrate is at least partially positioned in the sub-display units, and the vertical projection of the non-transparent area on the array substrate is positioned between the sub-display units and the sub-display units which are arranged adjacent to the sub-display units along the first direction or the second direction;
the array substrate comprises a plurality of same display unit areas, the display units are arranged in the display unit areas, and each display unit area comprises at least three display units which are sequentially arranged along the second direction;
the number of the first color sub-display units provided with the fingerprint identification units in the display unit area is N1, the number of the second color sub-display units provided with the fingerprint identification units is N2, and the number of the third color sub-display units provided with the fingerprint identification units is N3; wherein the content of the first and second substances,
n1 is N3-N2, and N1, N2 and N3 are all positive integers greater than or equal to 1.
2. The display panel according to claim 1,
and the fingerprint identification unit is arranged on one sub-display unit in the display units.
3. The display panel according to claim 2,
the first color sub-display unit is a red sub-display unit, the second color sub-display unit is a green sub-display unit, and the third color sub-display unit is a blue sub-display unit.
4. The display panel according to claim 3,
the display unit area comprises three display units; wherein the content of the first and second substances,
N1＝N2＝N3＝1。
5. the display panel according to claim 3,
wherein, N1: n2: n3 ═ 1: 2: 1.
6. the display panel according to claim 5,
the display unit area comprises four display units; wherein the content of the first and second substances,
N1＝1，N3＝1，N2＝2。
7. the display panel according to claim 6,
and two second color sub-display units provided with the fingerprint identification units in the display unit area are adjacently arranged in the second direction.
8. The display panel according to claim 6,
and two second color sub-display units which are provided with the fingerprint identification units in the display unit area are provided with one second color sub-display unit at intervals in the second direction.
9. The display panel according to any one of claims 1 to 8,
the fingerprint identification unit comprises a photosensitive diode, a storage capacitor and a thin film transistor;
the anode of the photosensitive diode is electrically connected with the first electrode of the storage capacitor, and the cathode of the photosensitive diode is electrically connected with the second electrode of the storage capacitor and the source electrode of the thin film transistor; the grid electrode of the thin film transistor is electrically connected with the switch control line, and the drain electrode of the thin film transistor is electrically connected with the signal detection line;
the photodiode is used to convert light reflected by the touch subject into a current signal.
10. The display panel according to claim 9,
the sub-display unit provides a light source for the fingerprint identification unit;
and light rays emitted by the sub-display unit are reflected by the touch main body to form reflected light to enter the fingerprint identification unit so as to carry out fingerprint identification.
11. The display panel according to any one of claims 1 to 8,
the display panel is a liquid crystal display panel or an organic light emitting display panel.
12. The display panel according to any one of claims 1 to 8,
the display panel further comprises an encapsulation layer, and the encapsulation layer is positioned on one side of the sub-display units away from the substrate base plate;
the fingerprint identification unit is arranged on the packaging layer.
13. The display panel according to claim 12,
the packaging layer is a transparent rigid cover plate, and the fingerprint identification unit is arranged on one side of the transparent rigid cover plate close to the array substrate.
14. The display panel according to claim 12,
the packaging layer is a thin film packaging layer, and the fingerprint identification unit is arranged on one side, far away from the array substrate, of the thin film packaging layer.
15. The display panel according to any one of claims 1 to 8,
the display panel further comprises a second substrate arranged opposite to the substrate, and the second substrate is closer to the touch surface of the touch body than the substrate;
the fingerprint identification unit is arranged on the second substrate.
16. A display device characterized by comprising the display panel according to any one of claims 1 to 15.
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| CN201810356228.2A CN108649049B (en) | 2018-04-19 | 2018-04-19 | Display panel and display device |
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| CN201810356228.2A CN108649049B (en) | 2018-04-19 | 2018-04-19 | Display panel and display device |
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| CN108649049B true CN108649049B (en) | 2020-08-04 |
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