CN108830234B - Display panel and display device - Google Patents
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- 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
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- H10K59/65—OLEDs integrated with inorganic image sensors
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- 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
- G06V40/1341—Sensing with light passing through the finger
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Abstract
本发明实施例提供了一种显示面板及显示装置，通过在对显示面板的指纹识别区减少像素分布密度，具体做法是减少发光单元和对应的驱动阵列基板上驱动电路的数量，同时采用像素渲染的方式来满足视觉分辨率的需求。通过减少驱动阵列基板上的驱动电路，增加了透光区，提升了显示面板上的有效透光区，从而大大提升了整体的透光率，提升光感指纹识别的灵敏度。
Embodiments of the present invention provide a display panel and a display device. By reducing the pixel distribution density in the fingerprint identification area of the display panel, the specific method is to reduce the number of driving circuits on the light-emitting unit and the corresponding driving array substrate, and at the same time use pixel rendering way to meet the needs of visual resolution. By reducing the driving circuit on the driving array substrate, the light-transmitting area is increased, and the effective light-transmitting area on the display panel is improved, thereby greatly improving the overall light transmittance and improving the sensitivity of light-sensitive fingerprint recognition.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
For a display panel with a fingerprint identification function, in order to better realize a comprehensive screen design and avoid the occupation of a non-display area by a fingerprint identification area, a display area can be reused as the fingerprint identification area by adopting a fingerprint technology under a screen at present. When the display area is multiplexed to be a fingerprint identification area, a plurality of fingerprint identification units are further arranged at positions corresponding to the fingerprint identification area in the display panel, when fingerprint identification is carried out, light rays emitted by the light source are reflected by fingers and enter the fingerprint identification unit of the specific area, and then the fingerprint identification unit identifies the ridges of the fingerprints corresponding to the area according to the received reflected light rays.
However, in the prior art, since the arrangement of each film layer and other components in the driving unit of the display panel is compact, the light-transmitting area on the display panel is not high, and the outgoing and entering of light are affected, so that the sensitivity of light sensing fingerprint identification is affected.
[ summary of the invention ]
Embodiments of the present invention provide a display panel and a display device, which reduce the pixel distribution density in a fingerprint identification area of the display panel, specifically reduce the number of light emitting units and driving circuits on a corresponding driving array substrate, and simultaneously meet the requirement of visual resolution by adopting a pixel rendering method. Through reducing the drive circuit on the drive array substrate, increased the printing opacity district, promoted the effective printing opacity district on the display panel to promote holistic luminousness greatly, promoted light sense fingerprint identification's sensitivity.
In one aspect, an embodiment of the present invention provides a display panel, where the display panel includes scan lines arranged along a row direction and data lines arranged along a column direction;
the display panel comprises a display area, the display area comprises a fingerprint identification area and a non-fingerprint identification area,
the fingerprint identification area comprises a plurality of fingerprint area pixel units arranged in an array, and the non-fingerprint identification area comprises a plurality of non-fingerprint area pixel units arranged in an array;
the fingerprint area pixel units have a first distribution density in the display area, the non-fingerprint area pixel units have a second distribution density in the display area, and the second distribution density is 2-3 times (including an endpoint value) the first distribution density.
In another aspect, an embodiment of the present invention provides a display device, which includes the above display panel.
According to the light-emitting display panel and the display device provided by the embodiment of the invention, the differential resolution setting is carried out on the fingerprint identification area and the non-fingerprint identification area in the display panel, so that the light transmittance of the fingerprint identification area is increased, and the accuracy and the sensitivity of light sensation fingerprint identification are improved. On one hand, the pixel units of the fingerprint identification area are reduced relative to the non-fingerprint identification area in the row direction, and then the sub-pixels between adjacent rows are shared by adopting a pixel rendering method, so that the virtual pixel resolution consistent with the pixel resolution of the non-fingerprint identification area is realized. On the other hand, the pixel units of the fingerprint identification area are reduced relative to the non-fingerprint identification area in the column direction, and then the pixel rendering method is adopted to share the sub-pixels between the adjacent rows, so that the virtual sub-pixels meeting the requirements are realized. According to the technical scheme, the improvement of the light transmittance can be met and the resolution of a display picture is not influenced by a method of combining a hardware mode and a software mode in the fingerprint identification area.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is another schematic diagram of the display panel of FIG. 1;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the invention;
FIG. 4 is an enlarged schematic view of a portion of the display panel of FIG. 3;
FIG. 5 is a schematic view of a driving array substrate of the display panel of FIG. 3;
FIG. 6 is a schematic diagram of a driving method of the display panel shown in FIG. 3;
FIG. 7 is a schematic diagram illustrating a pixel rendering manner of the display panel in FIG. 3;
FIG. 8 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
FIG. 9 is an enlarged schematic view of a portion of the display panel of FIG. 8;
FIG. 10 is a schematic diagram of a driving method of the display panel in FIG. 8;
FIG. 11 is a schematic diagram illustrating a pixel rendering manner of the display panel in FIG. 8;
fig. 12 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;
FIG. 13 is an enlarged schematic view of a portion of the display panel of FIG. 12;
FIG. 14 is a schematic cross-sectional view of the display panel of FIG. 1;
FIG. 15 is a schematic diagram illustrating the operation of the light-sensing fingerprint identification unit 1 according to the present embodiment;
fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe pixel groups in embodiments of the present invention, the pixel groups should not be limited to these terms. These terms are only used to distinguish groups of pixels from each other. For example, the first pixel group may also be referred to as a second pixel group, and similarly, the second pixel group may also be referred to as a first pixel group without departing from the scope of embodiments of the present invention.
Through intensive research, the inventors of the present invention have shown fig. 1 to 15 for solving the problems in the prior art, wherein fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention; FIG. 2 is another schematic diagram of the display panel of FIG. 1; fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the invention; FIG. 4 is an enlarged schematic view of a portion of the display panel of FIG. 3; FIG. 5 is a schematic view of a driving array substrate of the display panel of FIG. 3; FIG. 6 is a schematic diagram of a driving method of the display panel shown in FIG. 3; FIG. 7 is a schematic diagram illustrating a pixel rendering manner of the display panel in FIG. 3; FIG. 8 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention; FIG. 9 is an enlarged schematic view of a portion of the display panel of FIG. 8; FIG. 10 is a schematic diagram of a driving method of the display panel in FIG. 8; FIG. 11 is a schematic diagram illustrating a pixel rendering manner of the display panel in FIG. 8; fig. 12 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention; FIG. 13 is an enlarged schematic view of a portion of the display panel of FIG. 12; FIG. 14 is a schematic cross-sectional view of the display panel of FIG. 1; fig. 15 is a schematic diagram illustrating the operation of the light-sensing fingerprint identification unit 1 according to the present embodiment. Embodiments of the present invention provide a display panel and a display device, which reduce the pixel distribution density in a fingerprint identification area of the display panel, specifically reduce the number of light emitting units and driving circuits on a corresponding driving array substrate, and meet the requirement of visual resolution by adopting a pixel rendering mode.
Specifically, as shown in fig. 1 to 15, an embodiment of the invention provides a display panel 100, which includes a fingerprint identification area 101 (an area corresponding to a light-sensing fingerprint identification unit 1 is a fingerprint identification area) and a non-fingerprint identification area 102. The fingerprint identification region 101 includes a light-transmitting region Tr (shown by a dotted line in fig. 5) and a non-light-transmitting region (not shown). It should be noted that, as shown in fig. 5, the light-transmitting region Tr in the embodiment of the present invention refers to a region on the driving array substrate where light can transmit, as shown in a dashed line frame of fig. 5, metal traces (the metal traces refer to various metal functional traces on the driving array substrate, such as PVDD traces, scan lines, data lines, light-emitting control signal lines, and the like) in the light-transmitting region Tr are sparsely arranged, and the distances between the metal traces are relatively large, so that, in combination with fig. 14, light can be reflected by the touch main body 3 (such as a finger) and then incident on the light-sensing fingerprint identification unit 1 through the light-transmitting region Tr. In addition, the non-light-transmitting region mainly refers to a region where metal traces are dense and overlapping degree between films is high, and light cannot penetrate due to overlapping of the metal traces located in different films, such as a capacitor and a pixel unit R/G/B on the driving array substrate in fig. 5.
Specifically, as shown in fig. 1 to 2, the display panel 100 includes a scanning line S1 disposed in a row direction and a data line D1 disposed in a column direction; the fingerprint identification area 101 comprises a plurality of fingerprint area pixel units E11 arranged in an array; the non-fingerprint identification 102 region comprises a plurality of non-fingerprint region pixel units E12 arranged in an array. The pixel unit E11 in the fingerprint area has a first distribution density P1 in the display area, the pixel unit E in the non-fingerprint area has a second distribution density P2 in the display area, and the second distribution density P2 is 2-3 times (including an end point value) the first distribution density P1. It should be noted that, in the embodiment of the present invention, the distribution density of the pixel unit refers to the number of sub-pixels arranged in a unit area.
As shown in fig. 14 and 15, in the embodiment of the present invention, the display panel 100 further includes a photosensitive fingerprint identification unit 1. The realization process of the light-sensitive fingerprint identification function on the display panel is approximately as follows: when fingerprint identification is performed, light emitted by the light source reaches the touch main body 3 (such as a finger), the light is reflected by the touch main body 3 (such as the finger), the reflected light irradiates the light sensation fingerprint identification unit 1 arranged in the display panel 100, and the light sensation fingerprint identification unit 1 judges valleys and ridges of a fingerprint according to the received light, so that fingerprint identification of a user is realized.
As shown in fig. 15, fig. 15 is a schematic diagram illustrating an operation process of the light-sensing fingerprint identification unit 1 according to the present embodiment; the light sensing fingerprint identification unit 1 includes a light sensing module 001, an identification module 002 and a feedback module 003. When fingerprint identification is carried out, light emitted by the light source irradiates the touch main body 3, the touch main body 3 reflects the light to form reflected light, the reflected light is incident to the light sensing module 001, the light sensing module 001 is used for sensing the received light, and the identification module 002 is electrically connected with the light sensing module 001 and used for identifying valleys and ridges of a fingerprint according to the light received by the light sensing module 001; the feedback module 003 is configured to feed back the fingerprint result identified by the identification module 002 to a driving chip (not shown) to perform a corresponding operation.
With reference to fig. 14, it should be noted that, when performing fingerprint identification, an external light source may be disposed on the display panel 100 as a light source of the fingerprint identification unit 1, or each light-emitting unit for normal display in the display panel 100 may be used as a light source of the fingerprint identification unit. In the red light emitting unit, the green light emitting unit and the blue light emitting unit, since the green light emitted by the green light emitting unit has high brightness and the life of the light emitting layer of the green light emitting unit is reduced, when each light emitting unit in the display panel is used as the light source of the fingerprint identification unit 1, the green light emitting unit B is selected as the main light source of the fingerprint identification unit 1, and the blue light emitting unit can be used as the auxiliary light source.
The embodiment of the invention is explained in detail by carrying out pixel units with different densities in the fingerprint identification area and the non-fingerprint identification area.
As shown in fig. 3 to 7, an embodiment of the invention provides a display panel 100, which includes a fingerprint identification area 101 (shown as a dashed box) and a non-fingerprint identification area 102 (shown as a dashed box). As shown in fig. 3, in the fingerprint identification region 101, the fingerprint region pixel units R1/B1/G1 are arranged in an M1 × N1(M1, N1 is a positive integer) array in the same area; in the non-fingerprint identification region 102, the non-fingerprint region pixel cells R/B/G are arranged in an M1 × 2N1 array; where M1 is the number of rows along the scan line direction S11 (row direction), and N1 is the number of columns along the data line direction D21 (column direction). For example, as shown in fig. 3, under the same area, the fingerprint identification region 101 has M1 rows of pixel cells, and the non-fingerprint identification region 102 also has M1 rows of pixel cells, but the fingerprint identification region 101 has a pixel cell column number N1 which is half of the pixel cell column number 2N1 of the non-fingerprint identification region 102. That is, the pixel cells in the fingerprint area have a first distribution density P1 in the display area, and the pixel cells in the non-fingerprint area have a second distribution density P2 in the display area, where the second distribution density P2 is 2 times the first distribution density P1.
With continuing reference to fig. 3 and 4, in the fingerprint identification area 101, each row of pixels includes a plurality of sequentially arranged first pixel groups P11, and each first pixel group P11 includes three fingerprint area pixel units sequentially arranged along the row direction S1: fingerprint region red pixel cell R1, fingerprint region blue pixel cell B1, and fingerprint region green pixel cell G1.
In the non-fingerprint identification region 102, each row of pixels includes a plurality of second pixel groups P21 arranged in sequence, and each second pixel group P21 includes six non-fingerprint region pixel units arranged in sequence along the row direction S1: a first non-fingerprint region red pixel cell R11, a first non-fingerprint region green pixel cell G11, a first non-fingerprint region blue pixel cell B11, a second non-fingerprint region red pixel cell R12, a second non-fingerprint region green pixel cell G12, and a second non-fingerprint region blue pixel cell B12.
Note that, in the column direction D1, the fingerprint region red pixel cell R1 and the corresponding first non-fingerprint region red pixel cell R11 are located in the same column; the fingerprint area blue pixel cell B1 is in the same column as the corresponding first non-fingerprint area blue pixel cell B11; the fingerprint region green pixel cell G1 is in the same column as the corresponding second non-fingerprint region green pixel cell G12.
In addition, with continued reference to fig. 4, in the fingerprint identification area 101, in the same first pixel group P11, in the row direction S1, the fingerprint area red pixel cells R1 and the fingerprint area blue pixel cells B1 have a first pitch D11; the fingerprint area blue pixel cell B1 and the fingerprint area green pixel cell G1 have a second pitch D12, and it should be noted that: here, the pitch refers to a distance between edges of two adjacent pixel cells along the row direction S1.
In the non-fingerprint identification region 102, in the same second pixel group P12, the first non-fingerprint region red pixel cell R11 and the first non-fingerprint region blue pixel cell G11 have a third pitch D21 in the row direction S1; the first non-fingerprint region blue pixel cell B11 and the second non-fingerprint region green pixel cell G12 have a fourth pitch D22; the first pitch D11 is substantially equal to the third pitch D21, and the second pitch D12 is substantially equal to the fourth pitch D22.
In summary, in order to realize the pixel unit distribution density of the fingerprint identification area, the pixel unit distribution density of the non-fingerprint identification area is adopted. The embodiment of the invention increases the light transmission area of the display panel by leaving out every other pixel unit in the column direction D1 in the fingerprint identification area 101. In particular, by reducing the number of pixel cells and corresponding driver circuits on the driver array substrate. As shown in fig. 5, on the array driving substrate of the display panel 100, there are a plurality of light transmission regions Tr. On the non-fingerprint identification area 102, the pixel units R/G/B and the corresponding pixel driving circuits PX are sequentially arranged compactly in the manner as described above. On the fingerprint identification area 101, the pixel units R/G/B and the corresponding pixel driving circuits PX are: every other pixel unit is the area of keeping somewhere vacant of a pixel unit and drive circuit, and the metal of this area of keeping somewhere is walked very sparsely to form a plurality of printing opacity district Tr, promoted the luminousness of fingerprint identification district 101 department greatly, thereby promote the whole luminousness of display panel 100. In the embodiment of the invention, the light transmittance of the display panel 100 is 7.3% -8.7%, and the display panel has excellent light transmittance, so that the light sensation fingerprint identification precision can be greatly improved. In addition, it should be noted that: the overall transmittance of the display panel is an average value concept, and includes the combined transmittance of the non-transmissive region and the transmissive region on the display surface. Generally speaking, if the display panel can realize the light sensing fingerprint identification function for ensuring, the light sensing fingerprint identification function can be realized only when the overall light transmittance of the display panel is more than 1%.
In order to solve the problem that the display resolution is reduced due to halving of the actual sub-pixel distribution density, the embodiment of the invention meets the requirement of the visual resolution by adopting a pixel rendering mode, realizes the consistency of the pixel resolution of the fingerprint identification area and the non-fingerprint identification area, and realizes a uniform display effect. The method comprises the following specific steps:
referring to fig. 6 and 7, the display panel 100 in the embodiment of the present invention further includes a data driving unit supplying a data signal to the display region through the data line, so that the display region operates. In the embodiment of the invention, the signals transmitted by the driving unit to the pixel units of the fingerprint identification area and the non-fingerprint identification area are different. Specifically, as shown in fig. 6, the data driving unit supplies a first input signal to the non-fingerprint area pixel unit located in the non-fingerprint identification area; the data driving unit provides a second input signal to the fingerprint area pixel unit located in the fingerprint identification area. And the second input signal is compressed and then outputs a third input signal to the fingerprint identification area, and the data volume of the third input signal is half of that of the second input signal. What needs to be explained here is: in the embodiment of the present invention, since the pixel cell distribution density P1 of the fingerprint identification area, that is, the number of the pixel cells of the fingerprint identification area is half of the number of the pixel cells of the non-fingerprint identification area in the same area, the required data signal amount is also halved correspondingly, and therefore the third input signal corresponding to the input fingerprint identification area needs to be output after the second input signal is compressed correspondingly.
Further, to ensure that no degradation in resolution is observed by the human eye due to a decrease in the amount of data signals. The embodiment of the invention adopts a pixel rendering mode to share the pixel units to realize double virtual resolution.
When the fingerprint area pixel unit receives a third input signal, a display picture with a first virtual resolution is output through a first rendering processing step; wherein the first virtual resolution is twice the actual resolution of the fingerprint area.
For, the first rendering algorithm processing step comprises: in the row direction, three adjacent display units are realized in a pixel unit sharing mode.
Specifically, as shown in fig. 7, three adjacent display units in the fingerprint identification area are taken as an example for explanation. The three adjacent display units are respectively provided with a first display unit 110 (outlined by a solid line in fig. 7), a second display unit 210 (outlined by a solid line in fig. 7), and a third display unit 310 (outlined by a solid line in fig. 7) in this order.
In the row direction S1, the first display unit 110 sequentially includes the fingerprint area red pixel unit R110 and the fingerprint area blue pixel unit B110; the second display unit 210 includes a fingerprint region green pixel unit G210; the third display unit 310 sequentially includes a fingerprint area red pixel unit R310 and a fingerprint area blue pixel unit B310.
After the first rendering algorithm processing step, the first display unit 110 shares the fingerprint area green pixel unit G210 in the second display unit 210 to form a first virtual display unit 111 (shown by a dashed line in fig. 7). The first virtual display unit 111 includes a fingerprint area red pixel unit R110, a fingerprint area blue pixel unit B110, and a fingerprint area green pixel unit G210.
After the first rendering algorithm processing step, the second display unit 210 shares the fingerprint area blue pixel cell B110 in the first display unit 110 and the fingerprint area red pixel cell R310 in the third display unit 310 to form a second virtual display unit 211 (shown by a dotted line in fig. 7). The second virtual display unit 211 includes a fingerprint region red pixel unit R310, a fingerprint region blue pixel unit B110, and a fingerprint region green pixel unit G210.
After the first rendering algorithm processing step, the third display unit 310 shares the fingerprint area green pixel unit in the second display unit 210, forming a third virtual display unit 311. The third virtual display unit 311 includes a fingerprint region red pixel unit R310, a fingerprint region blue pixel unit B310, and a fingerprint region green pixel unit G210.
After the step of processing by the first rendering algorithm, twice virtual pixel resolution is realized, so that the pixel resolution of the fingerprint identification area and the pixel resolution of the non-fingerprint identification area are consistent in human eye sense.
On the basis of the above embodiment, the invention also discloses another embodiment mode. The method comprises the following specific steps:
as shown in fig. 8 to 11, an embodiment of the invention provides a display panel 100, which includes a fingerprint identification area 201 (shown by a dashed box) and a non-fingerprint identification area 202 (shown by a dashed box). As shown in fig. 8, in the fingerprint identification area 201, the fingerprint area pixel units R/B/G are arranged in an M2 × N2(M2, N2 are positive integers) array in the same area; in the non-fingerprint identification region 202, the non-fingerprint region pixel cells R/B/G are arranged in a 2M 2N 2 array; where M2 is the number of rows along the scan line direction S1 (row direction), and N1 is the number of columns along the data line direction D1 (column direction).
For example, as shown in fig. 8, under the same area, the fingerprint identification region 201 has N2 columns of pixel cells, and the non-fingerprint identification region 202 also has N2 columns of pixel cells, but the fingerprint identification region 201 has a number of rows of pixel cells M2 that is half of the number of columns of pixel cells 2M2 that the non-fingerprint identification region 202 has. That is, the pixel cells in the fingerprint area have a first distribution density P1 in the display area, and the pixel cells in the non-fingerprint area have a second distribution density P2 in the display area, where the second distribution density P2 is 2 times the first distribution density P1.
With continuing reference to fig. 8 and 9, in the fingerprint identification area 201, in the same column (extending direction of the data line D1) of pixels along the column direction D1, two adjacent fingerprint area red pixel cells R have a fifth pitch D5 with another fingerprint area red pixel cell R, and it should be noted that: the pitch here refers to the distance between the central line of the pixel unit in the previous column and the central line of the pixel unit in the next column between two adjacent columns. In the non-fingerprint identification region 202, in the same column (extending direction of the data line D1) of pixels along the column direction D1, two adjacent non-fingerprint region red pixel cells R and another non-fingerprint region red pixel cell R have a sixth pitch D6. Wherein the fifth pitch D5 is greater than the sixth pitch D6. As shown in fig. 9, the length D5 of the fifth pitch and the length D6 of the sixth pitch satisfy the following condition: the length D5 ≈ 2 × (the length D6 of the sixth pitch) of the fifth pitch.
In summary, in order to realize the pixel unit distribution density of the fingerprint identification area, the pixel unit distribution density of the non-fingerprint identification area is adopted. The embodiment of the invention increases the light transmission area of the display panel by leaving out one row of pixel units in the fingerprint identification area in the column direction D1 by leaving out every other row of pixel units. In particular, by reducing the number of pixel cells and corresponding driver circuits on the driver array substrate.
Specifically, the driving array substrate of the display panel is provided with a plurality of light-transmitting areas. On the non-fingerprint identification area, the pixel units R/G/B and the corresponding pixel driving circuits PX are sequentially arranged compactly in the manner as described above. On the fingerprint identification area, the pixel unit R/G/B and the corresponding pixel driving circuit PX are: every other pixel unit is the area of keeping somewhere vacant of vacating a line pixel unit and drive circuit, and the metal of this area of keeping somewhere is walked very sparsely to form a plurality of printing opacity districts, promoted the luminousness of fingerprint identification district department greatly, thereby promote the whole luminousness of display panel 100. In the embodiment of the invention, the light transmittance of the display panel 100 is 7.3% -8.7%, and the display panel has excellent light transmittance, so that the light sensation fingerprint identification precision can be greatly improved. The schematic diagram of the driving array substrate in this embodiment is not shown. See the design in fig. 5. In addition, it should be noted that: the overall transmittance of the display panel is an average value concept, and includes the combined transmittance of the non-transmissive region and the transmissive region on the display surface. Generally speaking, if the display panel can realize the light sensing fingerprint identification function for ensuring, the light sensing fingerprint identification function can be realized only when the overall light transmittance of the display panel is more than 1%.
In order to solve the problem that the display resolution is reduced due to halving of the actual sub-pixel distribution density, the embodiment of the invention meets the requirement of the visual resolution by adopting a pixel rendering mode, realizes the consistency of the pixel resolution of the fingerprint identification area and the non-fingerprint identification area, and realizes a uniform display effect. The method comprises the following specific steps:
referring to fig. 10 and 11, the display panel 100 in the embodiment of the present invention further includes a data driving unit supplying a data signal to the display region through the data line so that the display region operates. In the embodiment of the invention, the signals transmitted by the driving unit to the pixel units of the fingerprint identification area and the non-fingerprint identification area are different. Specifically, as shown in fig. 10, the data driving unit supplies a fourth input signal to the non-fingerprint area pixel unit located in the non-fingerprint identification area; the data driving unit supplies a fifth input signal to the fingerprint area pixel unit located in the fingerprint identification area. And the fifth input signal is compressed and then outputs a sixth input signal to the fingerprint identification area, and the data volume of the sixth input signal is half of that of the fifth input signal. What needs to be explained here is: in the embodiment of the present invention, since the pixel cell distribution density P1 of the fingerprint identification area, that is, the number of the pixel cells of the fingerprint identification area is half of the number of the pixel cells of the non-fingerprint identification area in the same area, the required data signal amount is also halved accordingly, and the sixth input signal corresponding to the input fingerprint identification area needs to be output after the fifth input signal is compressed accordingly.
Further, to ensure that no degradation in resolution is observed by the human eye due to a decrease in the amount of data signals. The embodiment of the invention adopts a pixel rendering mode to share the pixel units to realize double virtual resolution.
When the fingerprint area pixel unit receives a fifth input signal, a display picture with a second virtual resolution is output through a second rendering processing step; wherein the second virtual resolution is twice the actual resolution of the fingerprint area.
For, the second rendering algorithm processing step includes: in the row direction, two adjacent display units are realized in a pixel unit sharing mode.
Specifically, as shown in fig. 11, two display units in two adjacent rows in the fingerprint identification area are taken as an example for illustration. The two adjacent display units are respectively provided with a fourth display unit 410 (dashed lines in fig. 11) and a fifth display unit 510 (dashed lines in fig. 11).
In the row direction, the fourth display unit 410 sequentially includes a fingerprint area red pixel unit R, a fingerprint area green pixel unit G, and a fingerprint area blue pixel unit B; the fifth display unit 510 sequentially includes a fingerprint area red pixel unit R, a fingerprint area green pixel unit G, and a fingerprint area blue pixel unit B.
After the second rendering algorithm processing step, the fifth display unit 510 and the fourth display unit 410 form a sixth virtual display unit 610 in the column direction D1.
Specifically, after the second rendering algorithm processing step, the fingerprint region red pixel unit in the fourth display unit 410, the fingerprint region red pixel unit in the fifth display unit 510, forms the red pixel unit of the sixth virtual display unit 610; fingerprint area green pixel cell in the fourth display unit 410 the fingerprint area green pixel cell in the fifth display unit 510, forming the green pixel cell of the sixth virtual display unit 610; fingerprint area blue pixel cell in the fourth display unit 410 the fingerprint area blue pixel cell in the fifth display unit 510 forms the blue pixel cell of the sixth dummy display unit 610.
After the step of processing by the second rendering algorithm, twice virtual pixel resolution is realized, so that the pixel resolution of the fingerprint identification area and the pixel resolution of the non-fingerprint identification area are consistent in human eye sense.
On the basis of the above embodiment, the invention also discloses another embodiment mode. The method comprises the following specific steps:
as shown in fig. 12 to 13, an embodiment of the invention provides a display panel 100, which includes a fingerprint identification area 301 (shown as a dashed box) and a non-fingerprint identification area 302 (shown as a dashed box). As shown in fig. 12, in the fingerprint identification region 301, the fingerprint region pixel cells R/B/G are arranged in an M3 × N3(M3, N3 are positive integers) array in the same area; in the non-fingerprint identification region 302, the non-fingerprint region pixel cells R/B/G are arranged in a 3M 3N 3 array; where M3 is the number of rows along the scan line direction S1, and N3 is the number of columns along the data line direction D1.
For example, as shown in fig. 12, under the same area, the fingerprint identification area 301 has N3 columns of pixel cells, and the non-fingerprint identification area 302 also has N3 columns of pixel cells, but the fingerprint identification area 301 has a number of rows of pixel cells M3 that is one third of the number of columns of pixel cells 3M2 that the non-fingerprint identification area 302 has. That is, the pixel cells in the fingerprint area have a first distribution density P1 in the display area, and the pixel cells in the non-fingerprint area have a second distribution density P2 in the display area, where the second distribution density P2 is 32 times the first distribution density P1.
With continued reference to fig. 12 and 13, in the fingerprint identification area 301, in the same column (extending direction of the data line D1) of pixels in the column direction D1, two adjacent fingerprint area red pixel cells R have a seventh pitch D7 with another fingerprint area red pixel cell R; in the non-fingerprint identification region 302, in the column direction D1, two adjacent non-fingerprint region red pixel cells R and another non-fingerprint region red pixel cell R have an eighth pitch D8 in the same column (extending direction of the data line D1) of pixels. Wherein the seventh pitch D7 is greater than the eighth pitch D8. As shown in fig. 13, the length D7 of the seventh pitch and the length D8 of the eighth pitch satisfy the following condition: the length D7 ≈ 3 × (length D8 of eighth pitch) of the seventh pitch.
In summary, the pixel unit distribution density of the fingerprint identification area is one third of that of the non-fingerprint identification area. In the fingerprint identification area, two rows of pixel units are spaced out in the column direction D1 every other row of pixel units, so that the light transmission area of the display panel is increased. In particular, by reducing the number of pixel cells and corresponding driver circuits on the driver array substrate.
Specifically, the driving array substrate of the display panel is provided with a plurality of light-transmitting areas. On the non-fingerprint identification area, the pixel units and the corresponding pixel driving circuits are sequentially and compactly arranged in the manner described above. On the fingerprint identification area, the pixel units and the corresponding pixel driving circuits PX are represented as: every other a line pixel unit is the empty region of leaving a blank of two lines of pixel units and drive circuit, and the metal of this empty region of leaving a blank is walked very sparsely to form a plurality of printing opacity districts, promoted the luminousness of fingerprint identification district department greatly, thereby promote the whole luminousness of display panel. In the embodiment of the invention, the light transmittance of the display panel 100 is 8% -9.6%, and the display panel has excellent light transmittance, so that the light sensation fingerprint identification precision can be greatly improved. The schematic diagram of the driving array substrate in this embodiment is not shown. See the design in fig. 5. In order to solve the problem that the display resolution is reduced due to the fact that the actual sub-pixel distribution density is reduced by one third, the embodiment of the invention meets the requirement of the visual resolution by adopting a pixel rendering mode, realizes the consistency of the pixel resolutions of a fingerprint identification area and a non-fingerprint identification area, and realizes a uniform display effect. The specific method can refer to the implementation manner of the embodiment.
As shown in fig. 16, fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device includes the display panel 100 and the light sensing identification unit 1 disposed on the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 16 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
Because the display device provided by the embodiment of the invention comprises the display panel, the display device is adopted, and the light transmittance of the fingerprint identification area is increased and the accuracy and the sensitivity of the light-sensitive fingerprint identification are improved by setting the differential resolution of the fingerprint identification area and the non-fingerprint identification area in the display panel and combining a pixel rendering method.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (13)
1. A display panel includes scan lines arranged in a row direction and data lines arranged in a column direction;
the display panel comprises a display area, the display area comprises a fingerprint identification area and a non-fingerprint identification area,
the fingerprint identification area comprises a plurality of fingerprint area pixel units arranged in an array, and the non-fingerprint identification area comprises a plurality of non-fingerprint area pixel units arranged in an array;
the fingerprint area pixel units have a first distribution density in the display area, the non-fingerprint area pixel units have a second distribution density in the display area, and the second distribution density is 2-3 times of the first distribution density and comprises endpoint values;
under the same area, in the fingerprint identification region, the fingerprint region pixel units are arranged in an M1 × N1 array, wherein M1 and N1 are positive integers; in the non-fingerprint identification region, the non-fingerprint region pixel cells are arranged in an M1 x 2N1 array; wherein M1 is the number of rows along the scan line direction, and N1 is the number of columns along the data line direction;
the display panel further comprises a data driving unit, wherein the data driving unit provides data signals to the display area through the data lines to enable the display area to work;
the data driving unit provides a first input signal to the non-fingerprint area pixel unit located in the non-fingerprint identification area;
the data driving unit provides a second input signal to the fingerprint area pixel unit positioned in the fingerprint identification area;
after the second input signal is subjected to compression processing, a third input signal is output to the fingerprint identification area, and the data volume of the third input signal is half of that of the second input signal;
the fingerprint area pixel unit receives the third input signal and outputs a display picture with a first virtual resolution through a first rendering processing step;
the first virtual resolution is twice the actual resolution of the fingerprint region;
the first rendering algorithm processing step includes: in the row direction, three adjacent display units are realized in a pixel unit sharing mode.
2. The display panel according to claim 1, wherein in the fingerprint identification area, each row of pixels comprises a plurality of first pixel groups arranged in sequence, and each first pixel group comprises three fingerprint area pixel units arranged in sequence along a row direction; the three fingerprint area pixel units are respectively as follows:
the fingerprint area comprises a fingerprint area red pixel unit, a fingerprint area blue pixel unit and a fingerprint area green pixel unit;
in the non-fingerprint identification area, each row of pixels comprises a plurality of second pixel groups which are sequentially arranged, each second pixel group comprises six non-fingerprint area pixel units which are sequentially arranged along the row direction, and the six non-fingerprint area pixel units are respectively:
the pixel comprises a first non-fingerprint area red pixel unit, a first non-fingerprint area green pixel unit, a first non-fingerprint area blue pixel unit, a second non-fingerprint area red pixel unit, a second non-fingerprint area green pixel unit and a second non-fingerprint area blue pixel unit.
3. The display panel according to claim 2, wherein the fingerprint region red pixel cells are in the same column as the corresponding first non-fingerprint region red pixel cells in the column direction;
in the column direction, the fingerprint area blue pixel units and the corresponding first non-fingerprint area blue pixel units are positioned in the same column;
in the column direction, the fingerprint area green pixel units and the corresponding second non-fingerprint area green pixel units are positioned in the same column.
4. The display panel according to claim 3, wherein in the fingerprint identification region, in the same first pixel group, the fingerprint region red pixel cells and the fingerprint region blue pixel cells have a first pitch in a row direction; the fingerprint area blue pixel units and the fingerprint area green pixel units have a second pitch;
in the non-fingerprint identification area, in the same second pixel group, in the row direction, the first non-fingerprint area red pixel units and the first non-fingerprint area blue pixel units have a third pitch; the first non-fingerprint area blue pixel unit and the second non-fingerprint area green pixel unit have a fourth pitch;
wherein the first pitch is substantially equal to the third pitch, and the second pitch is substantially equal to the fourth pitch.
5. The display panel according to claim 3, wherein the three adjacent display units are respectively a first display unit, a second display unit and a third display unit which are sequentially arranged;
in the row direction, the first display unit sequentially comprises the fingerprint area red pixel unit and the fingerprint area blue pixel unit;
in the row direction, the second display unit comprises the fingerprint area green pixel unit;
in the row direction, the third display unit sequentially comprises the fingerprint area red pixel unit and the fingerprint area blue pixel unit;
after the first rendering algorithm processing step, the first display unit shares the fingerprint area green pixel unit in the second display unit to form a first virtual display unit;
after the first rendering algorithm processing step, the second display unit shares the fingerprint area blue pixel unit in the first display unit and the fingerprint area red pixel unit in the third display unit to form a second virtual display unit;
after the first rendering algorithm processing step, the third display unit shares the fingerprint area green pixel unit in the second display unit to form a third virtual display unit.
6. The display panel according to claim 3, wherein the display panel has a light transmittance of 7.3% to 8.7%.
7. A display panel includes scan lines arranged in a row direction and data lines arranged in a column direction;
the display panel comprises a display area, the display area comprises a fingerprint identification area and a non-fingerprint identification area,
the fingerprint identification area comprises a plurality of fingerprint area pixel units arranged in an array, and the non-fingerprint identification area comprises a plurality of non-fingerprint area pixel units arranged in an array;
the fingerprint area pixel units have a first distribution density in the display area, the non-fingerprint area pixel units have a second distribution density in the display area, and the second distribution density is 2-3 times of the first distribution density and comprises endpoint values;
under the same area, in the fingerprint identification region, the fingerprint region pixel units are arranged in an M2 × N2 array, wherein M2 and N2 are positive integers; in the non-fingerprint identification region, the non-fingerprint region pixel cells are arranged in a 2M2 × N2 array; wherein M2 is the number of rows along the scan line direction, and N2 is the number of columns along the data line direction;
the display panel further comprises a data driving unit, wherein the data driving unit provides data signals to the display area through the data lines to enable the display area to work;
the data driving unit provides a fourth input signal to the non-fingerprint area pixel unit located in the non-fingerprint identification area;
the data driving unit provides a fifth input signal to the fingerprint area pixel unit located in the fingerprint identification area;
after the fifth input signal is subjected to compression processing, a sixth input signal is output to the fingerprint identification area, and the data volume of the sixth input signal is half of that of the fifth input signal;
the fingerprint area pixel unit receives the sixth input signal and outputs a display picture with a second virtual resolution through a second rendering processing step;
the second virtual resolution is twice the actual resolution of the fingerprint region;
the second rendering algorithm processing step includes: in the column direction, two adjacent display units are realized in a pixel unit sharing mode.
8. The display panel according to claim 7, wherein in the fingerprint identification area, two fingerprint area pixel units adjacently arranged in a column direction have a fifth pitch therebetween;
in the non-fingerprint identification area, a sixth pitch is formed between two pixel units of the non-fingerprint area which are adjacently arranged in the column direction;
the fifth pitch is greater than the sixth pitch.
9. The display panel according to claim 8,
the length D5 of the fifth pitch and the length D6 of the sixth pitch satisfy the following condition:
the length of the fifth pitch D5 ≈ 2 × the length of the sixth pitch D6.
10. The display panel according to claim 8, wherein the adjacent two display units are respectively a fourth display unit and a fifth display unit which are sequentially arranged;
in the row direction, the fourth display unit sequentially comprises the fingerprint area red pixel unit, the fingerprint area green pixel unit and the fingerprint area blue pixel unit;
in the row direction, the fifth display unit sequentially comprises the fingerprint area red pixel unit, the fingerprint area green pixel unit and the fingerprint area blue pixel unit;
after the second rendering algorithm processing step, the fifth display unit and the fourth display unit form a sixth virtual display unit in the column direction.
11. The display panel according to claim 8, wherein the light transmittance of the fingerprint identification area is 7.3% to 8.7%.
12. The display panel according to any one of claims 1 to 11, wherein the display panel further comprises a light sensing fingerprint identification module, the light sensing fingerprint identification module comprises a light sensing module, an identification module and a feedback module;
the light sensing module is used for sensing received light;
the identification module is used for identifying the valleys and ridges of the fingerprint according to the light received by the light sensing module;
the feedback module is used for feeding back the fingerprint result identified by the identification module to the driving chip.
13. A display device characterized in that it comprises a display panel according to any one of claims 1 to 12.
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| CN109728048B (en) * | 2018-12-29 | 2021-03-02 | 武汉天马微电子有限公司 | Display panel and display device |
| CN109725701B (en) * | 2019-01-02 | 2022-04-29 | 京东方科技集团股份有限公司 | Display panel and device, image processing method and device, and virtual reality system |
| CN109616508B (en) * | 2019-01-09 | 2021-02-26 | 昆山国显光电有限公司 | Display screen, display screen driving method and display device |
| CN109637457B (en) * | 2019-02-14 | 2020-08-18 | 成都京东方光电科技有限公司 | Pixel circuit, display panel and display device |
| CN111180483B (en) | 2019-04-04 | 2021-02-26 | 昆山国显光电有限公司 | OLED array substrate, display panel and display device |
| CN109979391B (en) * | 2019-04-28 | 2021-05-11 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN110767141B (en) * | 2019-05-31 | 2022-08-30 | 昆山国显光电有限公司 | Display substrate, display panel and display device |
| CN210052743U (en) | 2019-06-28 | 2020-02-11 | 昆山国显光电有限公司 | Display substrate, display panel and display device |
| KR20210022818A (en) * | 2019-08-20 | 2021-03-04 | 삼성디스플레이 주식회사 | Display device |
| CN112997316B (en) * | 2019-10-24 | 2025-01-28 | 京东方科技集团股份有限公司 | Array substrate and manufacturing and control method thereof, and display device |
| CN111427180A (en) | 2020-04-02 | 2020-07-17 | 武汉华星光电半导体显示技术有限公司 | display panel |
| CN111681535A (en) * | 2020-06-22 | 2020-09-18 | Oppo广东移动通信有限公司 | Display panel and display device |
| CN114416009A (en) * | 2020-10-28 | 2022-04-29 | Oppo广东移动通信有限公司 | Image processing method, device, storage medium and electronic device |
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| CN107194321B (en) * | 2017-04-27 | 2020-04-21 | Oppo广东移动通信有限公司 | Display screen, display device and mobile terminal |
| CN107819018B (en) * | 2017-10-31 | 2020-11-10 | 武汉天马微电子有限公司 | An electroluminescent display panel and display device |
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