CN108596147B - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN108596147B
CN108596147B CN201810438927.1A CN201810438927A CN108596147B CN 108596147 B CN108596147 B CN 108596147B CN 201810438927 A CN201810438927 A CN 201810438927A CN 108596147 B CN108596147 B CN 108596147B
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sub
pixel
pixels
fingerprint
area
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CN108596147A (en
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蔡敏
秦丹丹
夏志强
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Shanghai AVIC Optoelectronics Co Ltd
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Shanghai AVIC Optoelectronics Co Ltd
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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)

Abstract

The invention discloses a display panel and a display device, which belong to the technical field of display and comprise: a display area and a non-display area; the display area comprises a plurality of pixels, the pixels comprise at least three sub-pixels with different colors, and the areas of the sub-pixels are equal; the display area comprises a plurality of sub-display areas, and each sub-display area comprises at least one pixel; in one sub-display area, the pixel comprises at least one fingerprint pixel, the fingerprint pixel comprises at least two fingerprint sub-pixels, and a fingerprint identification unit is arranged in the area where the fingerprint sub-pixels are located; in the same fingerprint pixel, the areas of the fingerprint identification units are not completely the same. Compared with the prior art, the fingerprint identification accuracy can be improved, and the color cast phenomenon of white light is improved.

Description

Display panel and display device
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
The prior art provides a display device in which a fingerprint recognition unit is integrated.
When the user uses the display device, the fingerprint identification unit may identify fingerprint information of the user, thereby causing the display device to perform a specific function, for example, the user may unlock the display device using a fingerprint.
The fingerprint identification function is convenient and fast, the safety is higher, and the performance of improving the fingerprint identification function is one of the research and development directions of the display device.
Disclosure of Invention
In view of the foregoing, the present invention provides a display panel and a display device.
The present invention provides a display panel, comprising: a display area and a non-display area; the display area comprises a plurality of pixels, the pixels comprise at least three sub-pixels with different colors, and the areas of the sub-pixels are equal; the display area comprises a plurality of sub-display areas, and each sub-display area comprises at least one pixel; in one sub-display area, the pixel comprises at least one fingerprint pixel, the fingerprint pixel comprises at least two fingerprint sub-pixels, and a fingerprint identification unit is arranged in the area where the fingerprint sub-pixels are located; in the same fingerprint pixel, the areas of the fingerprint identification units are not completely the same.
The invention also provides a display device which comprises the display panel provided by the invention.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
1. the fingerprint identification unit is arranged in the area where the sub-pixels are located, and the fingerprint identification function is integrated in the display area, so that the full-screen fingerprint identification function is realized;
2. the display area is divided into a plurality of sub-display areas, the fingerprint identification units in the sub-display areas are arranged in the same mode, so that the fineness of fingerprint identification in each sub-area of the display area is close to or the same, and the uniformity of full-screen fingerprint identification is improved;
3. the pixels in the sub-display area can be all fingerprint identification pixels or only part of the pixels can be fingerprint identification pixels, and the pixels are specifically set according to the specific design requirements of the display panel so as to meet the requirements of fingerprint identification functions of different display panels;
4. in the same fingerprint pixel, the areas of the fingerprint identification units are not completely the same, so that the accuracy of fingerprint identification is improved or the color cast phenomenon of white light is improved.
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 view of the structure of the sub-display region of FIG. 1;
FIG. 3 is a schematic diagram of a planar structure of a sub-pixel according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of a fingerprint identification unit according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of the fingerprint identification unit provided in FIG. 4;
FIG. 6 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic view of the structure of the sub-display region of FIG. 7;
fig. 9 is a schematic plan view illustrating a display panel according to another embodiment of the present invention;
FIG. 10 is a schematic diagram of a plan view of a sub-display area of a display panel according to another embodiment of the present invention;
fig. 11 is a schematic plan view illustrating a display panel according to another 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.
Referring to fig. 1 and 2, the present invention provides a display panel, including: a display area AA and a non-display area BB; the display area AA comprises a plurality of pixels 10, the pixels 10 comprise sub-pixels 11 of at least three different colors, and the areas of the sub-pixels 11 are equal;
the display area AA includes a plurality of sub-display areas a1, and the sub-display area a1 includes at least one pixel 10; in one sub-display area a1, the pixel 10 includes at least one fingerprint pixel 20, the fingerprint pixel 20 includes at least two fingerprint sub-pixels 21, and the fingerprint identification unit 30 is disposed in the area of the fingerprint sub-pixels 21; the areas of the fingerprint identification units 30 are not exactly the same in the same fingerprint pixel 20.
Specifically, the pixel 10 includes a first color sub-pixel 1R, a second color sub-pixel 1G, and a third color sub-pixel 1B, and the areas of the first color sub-pixel 1R, the second color sub-pixel 1G, and the third color sub-pixel 1B are equal.
The present invention will be described with respect to the area of the sub-pixel 11. Referring to fig. 3, the gate line G and the data line S are alternatively insulated from each other to define the area where the pixel electrode P1 is located. The pixel electrode P1 is electrically connected to the data line S through the thin film transistor TFT. The area of the sub-pixel 11 includes a region defined by the gate line G and the data line S crossing each other and insulated therefrom, and a region where a part of the gate line G and a part of the data line S are located. The size of the region where the sub-pixel 11 is located is the area of the sub-pixel 11.
In the present embodiment, the fingerprint pixel refers to a pixel having the fingerprint identification unit 30. The fingerprint identification unit 30 is arranged in the sub-pixels of the fingerprint pixels, and the sub-pixels in the area where the fingerprint identification unit 30 is arranged are the fingerprint sub-pixels 21. The fingerprint identification unit can convert the fingerprint information of the user into an electric signal, and the fingerprint information of the user can be acquired by calculating and analyzing the electric signals of the plurality of fingerprint identification units, so that the function of fingerprint identification is realized.
In this embodiment, only the sub-display area a1 including one pixel 10 is described as an example, and the pixel 10 is the fingerprint pixel 20. Also, in the plurality of sub display areas a1, the positions of the fingerprint identification units 30 are the same. In fig. 2, only the area where the first color sub-pixel 1R and the third color sub-pixel 1B are located is taken as an example to illustrate that the fingerprint identification unit 30 is located, in other words, in the plurality of sub-display areas a1, the fingerprint identification unit 30 is located in the first color sub-pixel 1R and the third color sub-pixel 1B. In each sub-display area A1, the fingerprint identification unit 30 is arranged identically, so that the fingerprint identification of each sub-display area A1 is fine and identical, the uniformity of full-screen fingerprint identification is improved, and the fingerprint identification performance of the display panel is improved.
In the display panel provided by the present embodiment, the areas of the fingerprint identification units 30 in the same fingerprint pixel 20 are not completely the same. Specifically, in the display panel shown in fig. 1 and 2, the areas of the fingerprint identification units 30 provided in the first color sub-pixel 1R and the third color sub-pixel 1B are different.
In some implementations, due to different materials of some film layers for making the sub-pixels of different colors, the sub-pixels of different colors have different luminance values when the areas of the sub-pixels are the same. The light-emitting brightness of the sub-pixels may influence the electric signal of the fingerprint identification unit, the area of the fingerprint identification unit in the same fingerprint pixel is set to be not identical, and the accuracy of fingerprint identification can be improved. Specifically, for example, the light-emitting brightness of the first color sub-pixel is stronger, the area of the fingerprint identification unit in the area where the first color sub-pixel is located is smaller, the light-emitting brightness of the third color sub-pixel is weaker, the area of the fingerprint identification unit in the area where the third color sub-pixel is located is larger, the area of the fingerprint identification unit for sensing the optical signal can be increased, the electric signal intensity of the fingerprint identification unit is increased, the influence of interference received by the fingerprint identification unit is favorably reduced, and the accuracy of fingerprint identification is improved.
In addition, in other implementation manners, due to different materials of some film layers for manufacturing the sub-pixels with different colors, when the areas of the sub-pixels are the same, the light-emitting brightness of the sub-pixels with different colors is different, so that color cast exists in white color light obtained after the color mixing of the sub-pixels. In order to reduce the color cast phenomenon of white light, the area of the pixel electrode or the area of the light emergent area of the sub-pixel can be adjusted by adjusting the area of the fingerprint identification unit, so that the color cast phenomenon of white light is improved. Specifically, for example, if the luminance of the light emitted from the first color sub-pixel is weak, the area of the fingerprint identification unit in the area where the first color sub-pixel is located is small, so that the area of the pixel electrode or the area of the light emitting area of the first color sub-pixel is large; the light-emitting brightness of the third color sub-pixel is strong, and the area of the fingerprint identification unit in the area where the third color sub-pixel is located is large, so that the area of the pixel electrode or the area of the light-emitting area of the third color sub-pixel is small, and therefore white light with good white balance is obtained after the first color sub-pixel, the second color sub-pixel and the third color sub-pixel are mixed, and the color cast phenomenon of the white light is improved.
The display panel provided by the embodiment at least has the following technical effects:
1. the fingerprint identification unit is arranged in the area where the sub-pixels are located, and the fingerprint identification function is integrated in the display area, so that the full-screen fingerprint identification function is realized;
2. the display area is divided into a plurality of sub-display areas, the fingerprint identification units in the sub-display areas are arranged in the same mode, so that the fineness of fingerprint identification in each sub-area of the display area is close to or the same, and the uniformity of full-screen fingerprint identification is improved;
3. the pixels in the sub-display area can be all fingerprint identification pixels or only part of the pixels can be fingerprint identification pixels, and the pixels are specifically set according to the specific design requirements of the display panel so as to meet the requirements of fingerprint identification functions of different display panels;
4. in the same fingerprint pixel, the areas of the fingerprint identification units are not completely the same, so that the accuracy of fingerprint identification is improved or the color cast phenomenon of white light is improved.
In the display panel provided by the embodiment of the invention, the specific structure of the fingerprint identification unit can be various.
In some alternative embodiments, the fingerprint identification unit comprises a photodiode, or the fingerprint identification unit comprises a fingerprint identification electrode.
Specifically, the fingerprint recognition unit may include a photodiode, and the photodiode may convert an optical signal into an electrical signal. Referring to fig. 4 and 5, fig. 4 is a circuit diagram of a fingerprint identification unit in a display panel according to an embodiment of the present invention, and fig. 5 is a schematic cross-sectional structure diagram of the fingerprint identification unit shown in fig. 4. In the display panel provided by each embodiment of the present invention, the fingerprint identification unit 30 includes a photodiode D and a thin film transistor T; the gate Tg of the thin film transistor T is electrically connected to a control signal line KL, the first pole Ts of the thin film transistor T is electrically connected to a signal line SL, and the second pole Td of the thin film transistor T is electrically connected to a photodiode D. The photodiode D is used to convert light reflected by the finger into a current signal.
Optionally, the photodiode D is a PIN diode. The photodiode D includes a PIN junction D3 between the anode D1 and the cathode D2. Among them, 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. Specifically, the cathode D2 is formed of opaque metal, and the boundary of the PIN junction D3 does not exceed the boundary of the cathode D2. 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. In this embodiment, the cathode D2 of the photodiode D is electrically connected to the second diode Td of the tft T.
In the fingerprint recognition stage, the thin film transistor T in the fingerprint recognition unit 30 is turned on. The light in the display panel is irradiated on 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 recognition unit 30, is received by the photodiode D of the fingerprint recognition unit 30, and is converted into a current signal, and the formed current signal is transmitted to the signal line SL through the thin film transistor T. Because the concave-convex degree and the concave-convex shape of the fingerprints at different positions on the finger are different, the reflectivity of the light irradiating different positions of the fingerprints is different, the intensity of the reflected light received by the fingerprint identification unit 30 is different, the current signals converted by the photosensitive diode D are different in size, and the fingerprints can be identified according to the size of the current signals.
Specifically, the fingerprint identification unit may include a fingerprint identification electrode, and the plurality of fingerprint identification electrodes are used to implement a fingerprint identification function. Specifically, after the fingerprint identification electrode receives the electric signal, a self-capacitance or a mutual capacitance can be formed as a basic capacitance. When a finger performs touch operation on the display panel, the influence of the concave-convex degree and the concave-convex shape of the fingerprint at different positions on the finger on the basic capacitance of the fingerprint identification electrode is different after the finger approaches or contacts the display panel. The variation of the capacitance of the fingerprint identification electrodes relative to the basic capacitance is analyzed, the concave-convex degree and the concave-convex shape of the fingerprint at the position of the fingerprint identification electrode can be obtained, and therefore fingerprint information can be identified.
In the following, the present invention is exemplified herein with respect to a specific arrangement of the fingerprint recognition unit.
Alternatively, referring to fig. 6, the sub-display area a1 includes at least two pixels 10, and the at least two pixels 10 include a fingerprint pixel 20 and a regular pixel 40;
the fingerprint identification unit 30 is not arranged in the region where the sub-pixels 11 of the regular pixels 40 are located, and the areas of the light emergent areas of the sub-pixels 11 of the regular pixels 40 are the same;
the fingerprint pixel 20 further comprises a regular sub-pixel 22, and a fingerprint identification unit is not arranged in the area of the regular sub-pixel 22;
in the fingerprint pixel 20, the area of the light exiting region of the fingerprint sub-pixel 21 is smaller than that of the light exiting region of the regular sub-pixel 22.
It should be noted that, for example, to clearly illustrate the technical solution of the present embodiment, the sub-pixel illustrated in fig. 6 is the light emitting area of the sub-pixel.
In the present embodiment, the sub-display area a1 is only illustrated as including two pixels 10, and the two pixels 10 are the fingerprint pixel 20 and the regular pixel 40, respectively. Optionally, the sub-display area a1 includes a plurality of pixels, and the plurality of pixels includes both fingerprint pixels and regular pixels.
Since the areas of the sub-pixels are the same in the fingerprint pixel 20 and the normal pixel 40, the fingerprint identification unit may occupy the area of the light emergent area of the sub-pixel, and therefore, the light emergent area of the fingerprint sub-pixel provided with the fingerprint identification unit is smaller than that of the normal sub-pixel without the fingerprint identification unit.
The fingerprint identification unit may occupy the area of the light emitting area of the sub-pixel, reducing the aperture ratio of the display panel. In the display panel provided by the embodiment, the plurality of pixels include both the fingerprint pixels and the regular pixels, that is, the fingerprint identification unit is arranged in only a part of the pixels. Therefore, the display panel provided by the embodiment can keep the area of the light emitting area of the conventional pixel free from the influence of the fingerprint identification unit, thereby being beneficial to realizing the full-screen fingerprint identification function, improving the aperture opening ratio of the display panel and improving the display quality.
Optionally, with continuing reference to fig. 6, in the plurality of pixels 10, except for the fingerprint sub-pixel 21, the light emitting areas of the remaining sub-pixels have the same size and shape. That is, the fingerprint identification unit changes only the area of the light emitting area of the fingerprint sub-pixel, and the size and shape of the light emitting area of the rest sub-pixels are kept consistent.
Optionally, referring to fig. 7, the pixels 10 in the sub-display area a1 are all fingerprint pixels 20; the sub-pixels in the fingerprint pixel 20 are all fingerprint sub-pixels 21.
It should be noted that, for example, to clearly illustrate the technical solution of the present embodiment, the sub-pixel illustrated in fig. 7 is the light emitting area of the sub-pixel.
In the display panel provided by this embodiment, the pixels are all provided with the fingerprint identification units, and each sub-pixel is provided with the fingerprint identification unit. Because the area of sub-pixel's the light-emitting area may be occupied to the fingerprint identification unit, all set up the fingerprint identification unit in the region at sub-pixel place in every pixel, be favorable to making the aperture opening ratio of each pixel keep unanimous, promote display panel's the homogeneity of display effect.
In addition, all set up the fingerprint identification unit in the region that the sub-pixel place in every pixel belongs to, be favorable to promoting the quantity of the fingerprint identification unit in the unit area to be favorable to promoting the precision of showing fingerprint identification inside.
Optionally, referring to fig. 8, the pixel 10 includes a red sub-pixel 1R, a green sub-pixel 1G, and a blue sub-pixel 1B; that is, the first color is red, the second color is green, and the third color is blue;
the fingerprint recognition unit 30 includes a photodiode;
in the same fingerprint pixel 20, the area of the fingerprint identification unit 30 in the region of the red sub-pixel 1R is SRThe area of the fingerprint identification unit 30 in the region of the green sub-pixel 1G is SGThe area of the fingerprint identification unit 30 in the region of the blue sub-pixel 1B is SBWherein S isB＞SR＞SG。
In a display panel, for example, a liquid crystal display panel, provided in the related art, sub-pixels display different colors using color resistors. Because the color resistors with different colors are made of different materials, the light transmittance of the color resistors with different colors is different. In general, the transmittance of the blue color resistor is small, the transmittance of the green color resistor is large, and the transmittance of the red color resistor is between the blue color resistor and the green color resistor. In other words, when the areas of the light emitting areas are the same, the green sub-pixel 1G is brightest, the red sub-pixel 1R is next to the red sub-pixel 1B, and the blue sub-pixel 1B is darkest.
The fingerprint identification unit 30 includes a photodiode, and light emitted from the sub-pixels is used as a light source to assist in implementing a fingerprint identification function. Specifically, the light emitted by the sub-pixels is irradiated on the finger and reflected on the surface of the finger fingerprint to form reflected light. The reflected light formed by reflection of the fingerprint of the finger is incident into the fingerprint recognition unit 30, received by the photodiode D of the fingerprint recognition unit 30, and converted into a current signal.
Because the blue sub-pixel is darkest, the light emitted by the blue sub-pixel is weaker, and the reflected light of the light emitted by the blue sub-pixel after being reflected by a finger is also weaker. Thus, the light intensity received by the photodiode in the area of the blue sub-pixel is weak. In order to increase the light intensity received by the photodiode in the area of the blue sub-pixel 1B, the area S of the fingerprint identification unit 30 in the area of the blue sub-pixel 1B is increasedBThe maximum setting is favorable for increasing the area of the photosensitive diode, namely the area of the fingerprint identification unit for sensing the optical signal, thereby increasing the electric signal intensity of the fingerprint identification unit and being favorable for reducing the fingerThe influence of interference received by the fingerprint identification unit improves the accuracy of fingerprint identification.
In order to make the accuracy of fingerprint identification of the fingerprint identification unit in the region where the red sub-pixel 1R, the green sub-pixel 1G and the blue sub-pixel 1B are located more uniform, in this embodiment, S is setB＞SR＞SG。
Because the green sub-pixel is brightest, the light emitted by the green sub-pixel is stronger, and the reflected light of the light emitted by the green sub-pixel after being reflected by the finger is also stronger. Thus, the light intensity received by the photodiode in the area of the green sub-pixel is strong. In order to make the accuracy of fingerprint identification of the fingerprint identification unit in the region where the sub-pixels with different colors are located more uniform, the area S of the fingerprint identification unit 30 in the region where the green sub-pixel 1G is located is determinedGThe minimum of setting is favorable to reducing photodiode's area, reduces the area that the fingerprint identification unit is used for sensing light signal promptly to reduce the electric signal intensity of fingerprint identification unit, make the fingerprint identification's of the fingerprint identification unit in green subpixel 1G and blue subpixel 1B place region precision comparatively homogeneous.
Since the brightness of the red sub-pixel is between the blue sub-pixel and the green sub-pixel, the area of the fingerprint identification unit in the region of the red sub-pixel 1R is SR，SRBetween SBAnd SGIn between, the accuracy of fingerprint identification of the fingerprint identification unit in the area where the red sub-pixel 1R, the green sub-pixel 1G and the blue sub-pixel 1B are located is facilitated to be uniform
Alternatively, referring to fig. 9, the fingerprint pixel 20 includes two fingerprint sub-pixels 21, and the two fingerprint sub-pixels 21 have the same color.
It should be noted that, for example, to clearly illustrate the technical solution of the present embodiment, the sub-pixel illustrated in fig. 9 is the light emitting area of the sub-pixel.
For example, in the display panel provided in this embodiment, the pixel includes 4 sub-pixels, and the 4 sub-pixels include three color sub-pixels, that is, two sub-pixels having the same color exist in the pixel. For example, the pixel 10 may include a first color sub-pixel 1R, two second color sub-pixels 1G, and a third color sub-pixel 1B. Wherein the first color is red, the second color is green, and the third color is blue; or the first color is green, the second color is red, and the third color is blue; alternatively, the first color is red, the second color is blue, and the third color is green.
Because the fingerprint identification unit may occupy the area of the light-emitting area of the sub-pixel, in this embodiment, two sub-pixels with the same color are arranged in the pixel, and the fingerprint identification unit is only arranged in the two sub-pixels with the same color, so that the areas of the light-emitting areas of the sub-pixels with the three colors are relatively uniform, and white light with good white balance is obtained after the sub-pixels with the three colors in the pixel are mixed, thereby improving the display quality of the display panel.
In the display panel provided by the embodiment of the invention, the relative position relationship between the fingerprint identification unit and the light emergent area of the sub-pixel can be various.
Optionally, the light-emitting area of the fingerprint sub-pixel surrounds or semi-surrounds the area where the fingerprint identification unit is located. Referring to fig. 7, the light-emitting area of the fingerprint sub-pixel 21 surrounds the area where the fingerprint identification unit 30 is located. Alternatively, referring to fig. 1, 6 or 9, the light-emitting area of the fingerprint sub-pixel 21 semi-surrounds the area where the fingerprint identification unit 30 is located.
With continued reference to fig. 1, 6 or 9, the fingerprint identification unit 30 may be located at a corner, or at a middle position, of the light exit area of the fingerprint sub-pixel.
Besides, the fingerprint identification unit 30 may be located at any position of the light emergent area of the fingerprint sub-pixel, and optionally, referring to fig. 10, the fingerprint identification unit 30 is only partially half-surrounded by the light emergent area of the fingerprint sub-pixel. Those skilled in the art can understand that there may be various relative position relationships between the fingerprint identification unit and the light-emitting area of the sub-pixel, and the embodiments of the present invention are not described in detail.
It should be noted that, for example, to clearly illustrate the technical solution of the present embodiment, the sub-pixel illustrated in fig. 10 is the light emitting area of the sub-pixel.
Optionally, referring to fig. 11, in the fingerprint pixel 20, the size and shape of the light emergent areas of the fingerprint sub-pixel 21 and the regular sub-pixel 22 are the same.
In this embodiment, the fingerprint identification unit may be located between the light emitting areas of the two adjacent sub-pixels, so that the size and the shape of the light emitting areas of the fingerprint sub-pixel 21 and the conventional sub-pixel 22 may be the same, which is beneficial to improving the display quality of the display panel.
Optionally, in the display panel provided in any embodiment of the present invention, in the sub-display area, the PPI of the fingerprint identification sub-pixel is greater than or equal to 300. PPI is an abbreviation for Pixels Per inc, which indicates the number of Pixels (Pixels) that are owned Per Inch. The PPI of the fingerprint identification sub-pixels is set to be more than or equal to 300, so that the fineness of fingerprint identification can be ensured, and the performance of fingerprint identification of the display panel is improved.
The invention also provides a display device which comprises the display panel provided by the invention.
Referring to fig. 12, fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention. Fig. 12 provides a display device 1000 including the display panel 1001 according to any of the above embodiments of the present invention. The embodiment of fig. 12 is only an example of a mobile phone, and the display device 1000 is described, it is to be understood that the display device provided in the embodiment of the present invention may be other display devices having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
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:
1. the fingerprint identification unit is arranged in the area where the sub-pixels are located, and the fingerprint identification function is integrated in the display area, so that the full-screen fingerprint identification function is realized;
2. the display area is divided into a plurality of sub-display areas, the fingerprint identification units in the sub-display areas are arranged in the same mode, so that the fineness of fingerprint identification in each sub-area of the display area is close to or the same, and the uniformity of full-screen fingerprint identification is improved;
3. the pixels in the sub-display area can be all fingerprint identification pixels or only part of the pixels can be fingerprint identification pixels, and the pixels are specifically set according to the specific design requirements of the display panel so as to meet the requirements of fingerprint identification functions of different display panels;
4. in the same fingerprint pixel, the areas of the fingerprint identification units are not completely the same, so that the accuracy of fingerprint identification is improved or the color cast phenomenon of white light is improved.
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 (10)

1. A display panel, comprising:
a display area and a non-display area;
the display area comprises a plurality of pixels, the pixels comprise sub-pixels of three different colors, and the areas of the sub-pixels are equal;
the display area comprises a plurality of sub-display areas, and the sub-display areas comprise at least one pixel; in one sub-display area, the pixel comprises at least one fingerprint pixel, the fingerprint pixel comprises two fingerprint sub-pixels, the two fingerprint sub-pixels are same in color, and a fingerprint identification unit is arranged in an area where the fingerprint sub-pixels are located;
and the areas of the fingerprint identification units are different in the same fingerprint pixel.
2. The display panel according to claim 1,
the fingerprint identification unit comprises a photosensitive diode, or the fingerprint identification unit comprises a fingerprint identification electrode.
3. The display panel according to claim 1,
the sub-display region comprises at least two of the pixels, and the at least two of the pixels comprise the fingerprint pixel and a regular pixel;
the fingerprint identification unit is not arranged in the area where the sub-pixels of the conventional pixel are located, and the areas of the light emergent areas of the sub-pixels of the conventional pixel are the same;
the fingerprint pixels also comprise conventional sub-pixels, and the fingerprint identification unit is not arranged in the area where the conventional sub-pixels are located;
in the fingerprint pixel, the area of the light emergent area of the fingerprint sub-pixel is smaller than that of the light emergent area of the conventional sub-pixel.
4. The display panel according to claim 1,
the pixels in the sub-display regions are all the fingerprint pixels;
the sub-pixels in the fingerprint pixels are all the fingerprint sub-pixels.
5. The display panel according to claim 4,
the pixels comprise red sub-pixels, green sub-pixels and blue sub-pixels;
the fingerprint identification unit comprises a photosensitive diode;
in the same fingerprint pixel, the area of the fingerprint identification unit in the area of the red sub-pixel is SRThe area of the fingerprint identification unit in the area of the green sub-pixel is SGThe area of the fingerprint identification unit in the area of the blue sub-pixel is SBWherein S isB＞SR＞SG。
6. The display panel according to claim 1,
the light-emitting area of the fingerprint sub-pixel surrounds or semi-surrounds the area where the fingerprint identification unit is located.
7. The display panel according to claim 3,
in the fingerprint pixel, the size and the shape of the light emergent area of the fingerprint sub-pixel and the light emergent area of the conventional sub-pixel are the same.
8. The display panel according to claim 1,
in the plurality of pixels, except the fingerprint sub-pixels, the light emergent areas of the rest sub-pixels have the same size and shape.
9. The display panel according to claim 1,
in the sub-display area, the PPI of the fingerprint sub-pixels is more than or equal to 300.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
CN201810438927.1A 2018-05-09 2018-05-09 Display panel and display device Active CN108596147B (en)

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US20200365099A1 (en) * 2019-05-19 2020-11-19 Innolux Corporation Display device and driving method thereof
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