CN108596083B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN108596083B CN108596083B CN201810366535.9A CN201810366535A CN108596083B CN 108596083 B CN108596083 B CN 108596083B CN 201810366535 A CN201810366535 A CN 201810366535A CN 108596083 B CN108596083 B CN 108596083B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
Abstract
The present invention provides a display panel, comprising: a plurality of light emitting cells arranged in a matrix; a plurality of pixel driving circuits; each light-emitting unit is correspondingly and electrically connected with a pixel driving circuit; at least one fingerprint recognition unit located at a backlight side of the light emitting unit; a plurality of reference voltage signal lines and a plurality of power voltage signal lines; wherein, the display panel satisfies at least one of the following three conditions: pixel driving circuits corresponding to two adjacent rows or two adjacent columns of light-emitting units share the same reference voltage signal line; the pixel driving circuits corresponding to two adjacent columns of light-emitting units share the same power supply voltage signal line; and the pixel driving circuits corresponding to two adjacent light-emitting units in the same row or the same column share at least one of the driving transistor, the reset transistor, the data writing transistor and the light-emitting control transistor. The invention improves the light transmittance of the reflected light formed after the reflection of the touch main body and increases the light signal quantity received by the fingerprint identification unit.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
With the development of display technology, display panels with fingerprint identification functions have gradually spread throughout the lives of people, wherein the light sensing fingerprint identification display panels have the advantages of good sensitivity, high resolution, strong stability and the like.
Fig. 1 is a schematic cross-sectional view of a conventional display panel, and referring to fig. 1, the display panel includes a light emitting unit 11 and a fingerprint identification unit 12, light emitted by the light emitting unit 11 is reflected by a touch main body 01 to form reflected light, and a part of the reflected light passes through each film layer of the display panel and is received by the fingerprint identification unit 12, and since intensities of light signals reflected by ridges and valleys included in the touch main body 01 are different, fingerprint identification can be performed according to the light signals received by the fingerprint identification unit 12. However, the fingerprint recognition sensitivity is to be further improved.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which aim to improve the light transmittance of reflected light formed after the reflected light is reflected by a touch main body and increase the light signal quantity received by a fingerprint identification unit.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a plurality of light emitting cells arranged in a matrix;
a plurality of pixel driving circuits; each light-emitting unit is correspondingly and electrically connected with one pixel driving circuit;
at least one fingerprint recognition unit located at a backlight side of the light emitting unit;
a plurality of reference voltage signal lines for supplying a reference voltage signal to each of the pixel driving circuits;
a plurality of power supply voltage signal lines for supplying a power supply voltage to each of the pixel driving circuits;
wherein the display panel satisfies at least one of the following three conditions:
the pixel driving circuits corresponding to the light-emitting units in two adjacent rows or two adjacent columns share the same reference voltage signal line;
the pixel driving circuits corresponding to the light-emitting units in two adjacent columns share the same power supply voltage signal line;
and the pixel driving circuits corresponding to two adjacent light-emitting units in the same row or the same column share at least one of a driving transistor, a reset transistor, a data writing transistor and a light-emitting control transistor.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel according to any of the above embodiments.
The embodiment of the invention meets the condition that the pixel driving circuits corresponding to two adjacent rows or two adjacent columns of light-emitting units share at least one of the same reference voltage signal line, the pixel driving circuits corresponding to two adjacent columns of light-emitting units share the same power supply voltage signal line, and the pixel driving circuits corresponding to two adjacent light-emitting units in the same row or the same column share at least one of the driving transistor, the reset transistor, the data writing transistor and the light-emitting control transistor, namely, the occupation area of the light-tight film layer on the display panel is reduced by the way that the pixel driving circuits share the reference voltage signal line, the power supply voltage signal line or the transistors (the driving transistor, the reset transistor, the data writing transistor and the light-emitting control transistor), thereby improving the light transmittance of the reflected light formed after the reflection of the touch main body, the light signal quantity received by the fingerprint identification unit is increased, and the sensitivity and accuracy of fingerprint identification of the display panel are enhanced.
Drawings
FIG. 1 is a schematic cross-sectional view of a conventional display panel;
fig. 2 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view along AA' in FIG. 2;
fig. 4 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the invention;
fig. 5 is a schematic diagram of a layout structure of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic top view illustrating a display panel according to another embodiment of the present invention;
fig. 7 is a schematic diagram of a layout structure of another display panel according to an embodiment of the present invention;
fig. 8 is a schematic top view illustrating a display panel according to another embodiment of the present invention;
fig. 9 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 2 is a schematic top view of a display panel according to an embodiment of the present invention, and fig. 3 is a schematic cross-sectional view along AA' in fig. 2. Referring to fig. 2 and 3, the display panel includes a plurality of light emitting units 110 (not shown in fig. 2) arranged in a matrix, a plurality of pixel driving circuits 120, at least one fingerprint identification unit 130 (not shown in fig. 2) located at a backlight side of the light emitting units 110, a plurality of reference voltage signal lines Ref, and a plurality of power voltage signal lines PVDD (not shown in fig. 3).
Each light emitting unit 110 is electrically connected to a corresponding pixel driving circuit 120, a plurality of reference voltage signal lines Ref are used for providing reference voltage signals to the pixel driving circuits 120, and a plurality of power voltage signal lines PVDD are used for providing power voltages to the pixel driving circuits 120. The light emitting unit 110 may optionally include an anode, a cathode, and a light emitting layer located between the anode and the cathode, wherein holes and electrons are injected into the light emitting layer from the anode and the cathode, respectively, under the driving of the pixel driving circuit 120, and the holes and the electrons meet and recombine in the light emitting layer, releasing energy, so that molecules of a substance in the light emitting layer transition from a ground state to an excited state. The excited state is unstable, and excited molecules return to the ground state from the excited state, and radiation transitions to produce a light emission phenomenon.
The fingerprint identification unit 130 is an optical fingerprint identification method, light emitted by the light source is reflected by the touch main body 001 to form reflected light, the fingerprint of the touch main body 001 has a protruding ridge portion and a recessed valley portion, the ridge portion directly contacts the display panel, and a certain gap is formed between the valley portion and the display panel, so that the intensities of optical signals of the reflected light formed by the light reflected by the ridge portion and the valley portion of the touch main body 001 are different, and the fingerprint identification unit 130 converts the optical signals into electrical signals according to the intensity of the received optical signals to realize fingerprint identification of the display panel.
The pixel driving circuits 120 corresponding to two adjacent rows of light emitting units 110 share the same reference voltage signal line Ref.
Since the pixel driving circuit 120 includes functional film layers such as metal film layers, which have poor light transmittance, and the reference voltage signal line Ref and the power supply voltage signal line PVDD have poor light transmittance in their coverage areas, which can be generally regarded as opaque, the light emitting unit 110 and the substrate 100 can be divided into a light-transmitting area 101 and a non-light-transmitting area 102.
In the fingerprint recognition process, if the light reflected by the touch main body 001 passes through the transparent region 101 of the display panel, the reflected light can reach the fingerprint recognition unit 130, and the reflected light can be used for fingerprint recognition, and if the light reflected by the touch main body 001 passes through the non-transparent region 102 of the display panel, the fingerprint recognition unit 130 cannot receive the signal of the reflected light, i.e., the reflected light cannot be used for fingerprint recognition, because the light transmitted through the non-transparent region 102 is very little.
It should be noted that the light-transmitting area 101 and the non-light-transmitting area 102 mentioned in the present embodiment are for the fingerprint identification unit 130, that is, the light-transmitting area 101 refers to an area where reflected light formed after being reflected by the touch subject 001 can be used for fingerprint identification, and the non-light-transmitting area 102 refers to an area where reflected light formed after being reflected by the touch subject 001 cannot be used for fingerprint identification. Wherein, the larger the area of the light transmission region 101, the better the light transmittance of the reflected light formed after reflection via the touch main body, the more the amount of the light signal received by the fingerprint identification unit 130, the stronger the sensitivity and accuracy of the fingerprint identification of the display panel.
In the display panel, since the pixel driving circuits 120 corresponding to two adjacent rows of the light emitting units 110 share the same reference voltage signal line Ref, the number of the reference voltage signal lines Ref in the display panel is reduced, and the area of the non-light-transmitting region 102 formed by the reference voltage signal lines Ref can be partially reduced. Since the area of the non-light-transmitting region 102 in the display panel is reduced, that is, the area of the light-transmitting region 101 of the display panel is increased, the transmittance of the reflected light formed by reflection from the touch subject is increased, and when the display panel performs fingerprint recognition, the reflected light formed by reflection from the touch subject 001 is received more by the fingerprint recognition unit 130, so that the amount of light signals received by the fingerprint recognition unit 130 is increased, and the sensitivity and accuracy of fingerprint recognition of the display panel are enhanced.
Optionally, the display panel further includes a light source of the fingerprint identification unit, and light emitted by the light source is reflected by the touch main body to form reflected light to enter the fingerprint identification unit for fingerprint identification. In actual installation, the light-emitting unit can be used as a light source, or an externally-hung fingerprint identification light source is arranged in the display panel.
Referring to fig. 3, in fig. 3, the light emitting unit 110 is exemplarily used as a light source of the fingerprint identification unit 130, light emitted by the light emitting unit 110 is reflected by a touch subject to form reflected light, and the reflected light is incident to the fingerprint identification unit 130 for fingerprint identification.
Fig. 4 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention, and fig. 4 shows a display panel structure of an externally-hung fingerprint identification light source. Referring to fig. 4, on the basis of the above scheme, optionally, the display panel further includes a fingerprint identification light source 210, and the fingerprint identification light source 210 is located on the non-photosensitive side of the fingerprint identification unit 130; the light emitted from the fingerprint identification light source 210 is reflected by the touch body 001 to form a reflected light, and the reflected light is incident to the fingerprint identification unit 130 for fingerprint identification.
The light emitted from the fingerprint identification light source 210 to the touch subject 001 passes through the pixel driving circuit 120 and the film layer where the reference voltage signal line Ref and the power supply voltage signal line PVDD are located during the propagation process; meanwhile, the light reflected by the touch object 001 also passes through the pixel driving circuit 120 and the film layer where the reference voltage signal line Ref and the power voltage signal line PVDD are located during the propagation process. Therefore, the area of the non-light-transmitting region 102 formed by the pixel driving circuit 120, the reference voltage signal line Ref and the power supply voltage signal line PVDD has a more significant influence on the fingerprint recognition of the display panel.
It should be noted that the pixel driving circuits 120 corresponding to two adjacent rows of the light emitting units 110 in the display panel exemplarily arranged in fig. 2 and fig. 3 share the same reference voltage signal line Ref. In other embodiments, the display panel may be configured to satisfy at least one of the following three conditions:
the pixel driving circuits 120 corresponding to the light emitting units 110 in two adjacent rows or two adjacent columns share the same reference voltage signal line Ref;
the pixel driving circuits 120 corresponding to two adjacent columns of light emitting units 110 share the same power voltage signal line PVDD;
the pixel driving circuits 120 corresponding to two adjacent light emitting units 110 in the same row or the same column share at least one of a driving transistor, a reset transistor, a data writing transistor, and a light emission control transistor.
Compared with the display panel shown in fig. 1, the non-light-transmitting area 13 occupies most of the area of the display panel, and most of the reflected light formed after being reflected by the touch main body 01 is shielded by the non-light-transmitting area 13 and cannot be recognized by the fingerprint recognition unit 12, the embodiment of the invention solves the problem of small light signal quantity received by the fingerprint identification unit of the display panel, realizes the effects of increasing the light signal quantity received by the fingerprint identification unit and enhancing the sensitivity and accuracy of fingerprint identification of the display panel.
Optionally, if the pixel driving circuits corresponding to the light emitting units in two adjacent rows or two adjacent columns in the display panel share the same reference voltage signal line Ref, the pixel driving circuits in two adjacent rows or two adjacent columns are mirror-symmetric with respect to the shared reference voltage signal line Ref. Referring to fig. 2, the pixel driving circuits 120 corresponding to two adjacent rows of light emitting units in the display panel share the same reference voltage signal line Ref, and the two adjacent rows of pixel driving circuits 120 are mirror-symmetric with respect to the shared reference voltage signal line Ref. By such an arrangement, the distances from the pixel driving circuits 120 in two adjacent rows to the common reference voltage signal line Ref can be made equal, and the wiring space can be saved.
Fig. 5 is a schematic diagram of a layout structure of a display panel according to an embodiment of the present invention, where in fig. 5, only a layout structure of a reference voltage signal line Ref shared by pixel driving circuits corresponding to two adjacent rows of light emitting units is shown, which is only a specific example of the present invention, specifically, the layout structures of the light emitting units and the pixel driving circuits may be selected according to actual requirements, and the present invention is not limited to this specifically. Referring to fig. 5, in the display panel, the pixel driving circuits corresponding to two adjacent rows of light emitting units share the same reference voltage signal line Ref, the reference voltage signal line Ref includes a widened portion Ref1 and a connection portion Ref2, a line width of the widened portion Ref1 is greater than a line width of the connection portion Ref2, and the widened portion Ref1 overlaps with at least one metal layer 220 in the pixel driving circuits.
The reference voltage signal lines Ref are used for providing reference voltage signals for the pixel driving circuits, and because impedance exists on the reference voltage signal lines Ref, for the pixel driving circuits in the same row or the same column at different positions, the reference voltage signals obtained by the pixel driving circuits close to the reference voltage signal input end and the pixel driving circuits far away from the reference voltage signal input end have difference, and particularly for a large-area display panel, the difference is more obvious, and the light emitting effect of the display panel is influenced.
The reference voltage signal line Ref includes a widened portion Ref1 and a connection portion Ref2, and since the widened portion Ref1 overlaps with at least one metal layer 220 in the pixel driving circuit, the reference voltage signal line Ref is set to include the widened portion Ref1, i.e., increasing the line width of the reference voltage signal line Ref does not increase the area of the non-transmission region in the display panel, and does not affect the transmittance of the reflected light formed after reflection by the touch subject.
In the present embodiment, the reference voltage signal line Ref is provided to include the widened portion Ref1 and the connection portion Ref2, the width of Ref1 of the widened portion is larger than the width of Ref2, and the line resistance of the reference voltage signal line Ref can be reduced because the width of the widened portion Ref1 is increased without affecting the transmittance of reflected light formed after reflection by the touch subject. Therefore, the embodiment of the invention further reduces the resistance on the reference voltage signal line Ref without affecting the transmittance of the reflected light formed after being reflected by the touch subject, and improves the display effect of the display panel.
With reference to fig. 5, optionally, the metal layer 220 includes at least one of an anode of the light emitting unit, a power voltage signal line PVDD, a data voltage signal line, a transistor gate of the pixel driving circuit, and a transistor source and drain of the pixel driving circuit.
Fig. 6 is a schematic top view of another display panel according to an embodiment of the present invention, referring to fig. 6, in the display panel, each light emitting unit is electrically connected to a pixel driving circuit 120, and the pixel driving circuits 120 corresponding to two adjacent columns of light emitting units share the same power voltage signal line PVDD.
In this embodiment, the display panel is configured such that the pixel driving circuits 120 corresponding to two adjacent columns of light emitting units share the same power supply voltage signal line PVDD, so that the number of the power supply voltage signal lines PVDD in the display panel is reduced, and the area of the non-light-transmitting region 102 formed by the power supply voltage signal lines PVDD can be reduced, thereby increasing the area of the light-transmitting region 101. The invention solves the problem of small light signal quantity received by the existing display panel fingerprint identification unit, and enhances the sensitivity and accuracy of the display panel fingerprint identification.
Referring to fig. 6, optionally, if the pixel driving circuits 120 corresponding to two adjacent columns of light emitting units in the display panel share the same power voltage signal line PVDD, the two adjacent columns of pixel driving circuits 120 are mirror-symmetric with respect to the shared power voltage signal line PVDD. With this arrangement, the distances between the pixel drive circuits 120 in two adjacent columns and the common power supply voltage signal line PVDD can be made equal, and the wiring space can be saved.
In fig. 6, for example, the pixel driving circuits 120 corresponding to every two adjacent columns of light emitting units all share the same power supply voltage signal line PVDD, and by such an arrangement, the number of the power supply voltage signal lines PVDD in the display panel can be reduced by half compared with the number of the power supply voltage signal lines PVDD in the existing display panel, thereby further reducing the area of the non-light-transmitting region 102 formed by the power supply voltage signal lines PVDD, improving the light transmittance of the display panel, increasing the amount of light signals received by the fingerprint identification unit, and enhancing the sensitivity and accuracy of fingerprint identification of the display panel.
Fig. 7 is a schematic diagram of a layout structure of another display panel according to an embodiment of the present invention, where in fig. 7, only a layout structure of one power supply voltage signal line PVDD shared by pixel driving circuits corresponding to two adjacent columns of light emitting units is shown, which is only a specific example of the present invention, specifically, the layout structures of the light emitting units and the pixel driving circuits may be selected according to actual requirements, and the present invention is not limited thereto. Referring to fig. 7, in the display panel, the pixel driving circuits corresponding to two adjacent columns of light emitting cells share the same power voltage signal line PVDD, the power voltage signal line PVDD includes a widened part PVDD1 and a connection part PVDD2, a line width of the widened part PVDD1 is greater than a line width of the connection part PVDD2, and the widened part PVDD1 overlaps with at least one metal layer 320 in the pixel driving circuit 120.
The power voltage signal line PVDD is used to provide a power voltage to each pixel driving circuit 120, and because impedance exists on the power voltage signal line PVDD, for the pixel driving circuits 120 at different positions in the same column, a difference exists between the power voltage obtained by the pixel driving circuit 120 close to the power voltage input end and the power voltage obtained by the pixel driving circuit 120 far from the power voltage signal input end, and particularly for a large-area display panel, the difference is more obvious, which will affect the light emitting effect of the display panel.
The power voltage signal line PVDD includes a widened part PVDD1 and a connection part PVDD2, and since the widened part PVDD1 overlaps with at least one metal layer 320 of the pixel driving circuit 120, the power voltage signal line PVDD is configured to include a widened part PVDD1, that is, increasing the line width of the power voltage signal line PVDD does not increase the area of the non-transparent region in the display panel, and does not affect the transmittance of the reflected light formed after being reflected by the touch subject.
In this embodiment, the power supply voltage signal line PVDD is provided with the widened part PVDD1 and the connection part PVDD2, the line width of the widened part PVDD1 is greater than the line width of the connection part PVDD2, and the line resistance of the power supply voltage signal line PVDD can be reduced because the line width of the widened part PVDD1 is increased under the condition that the transmittance of reflected light formed after reflection by the touch main body is not affected.
With reference to fig. 7, optionally, the metal layer 320 includes at least one of an anode of the light emitting unit, a reference voltage signal line Ref, a transistor gate of the pixel driving circuit 120, and a transistor source and drain of the pixel driving circuit 120.
Fig. 8 is a schematic top view of another display panel according to an embodiment of the present invention, referring to fig. 8, in which the pixel driving circuits 120 corresponding to two adjacent light emitting units in the same row share one transistor M.
The pixel driving circuit 120 includes a plurality of transistors M and a plurality of capacitors, and the transistors M may be at least one of a driving transistor, a reset transistor, a data writing transistor, and a light emission control transistor according to the structure of the pixel driving circuit.
It should be noted that, in the display panel shown in fig. 8, the pixel driving circuits 120 corresponding to two adjacent light emitting units 110 in the same row share one kind of transistor M, which is only a specific example of the present invention and is not a limitation to the present invention, and optionally, the pixel driving circuits 120 corresponding to two adjacent light emitting units 110 in the same column in the display panel may share one kind of transistor M.
In this embodiment, the display panel is configured such that the pixel driving circuits 120 corresponding to two adjacent light emitting units 110 in the same row share one transistor M, and the transistor M can be selected from at least one of a driving transistor, a reset transistor, a data writing transistor, and a light emitting control transistor, so that the number of at least one of the driving transistor, the reset transistor, the data writing transistor, and the light emitting control transistor in the display panel is reduced, and the area of a non-light-transmitting region formed by at least one of the driving transistor, the reset transistor, the data writing transistor, and the light emitting control transistor can be reduced. The invention solves the problem of small quantity of optical signals received by the fingerprint identification unit of the existing display panel, and realizes the improvement of the transmittance of reflected light formed after the reflected light is reflected by the touch main body, thereby increasing the quantity of the optical signals received by the fingerprint identification unit and enhancing the sensitivity and accuracy of fingerprint identification.
Referring to fig. 8, optionally, if the pixel driving circuits 120 corresponding to two adjacent light emitting units in the same row or the same column share at least one of the driving transistor, the reset transistor, the data writing transistor, and the light emitting control transistor, the pixel driving circuits 120 corresponding to two adjacent light emitting units in the same row or the same column are mirror-symmetric with respect to the shared transistor M. With this arrangement, the distances from the pixel driving circuits 120 corresponding to two adjacent light emitting units in the same row or column to the common transistor M can be made equal, thereby saving the wiring space.
It should be noted that the pixel driving circuit 120 includes a plurality of transistors and a plurality of capacitors, and optionally, the pixel driving circuit 120 may have a 2T1C (i.e., two transistors and one capacitor) structure or a 7T1C (i.e., seven transistors and one capacitor) structure, and the specific circuit structure of the pixel driving circuit 120 is not limited in the present invention.
Fig. 9 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention, referring to fig. 9, in the display panel, each light emitting unit is electrically connected to a pixel driving circuit 120, and the pixel driving circuits 120 corresponding to two adjacent rows of light emitting units share a same reference voltage signal line Ref; the pixel driving circuits 120 corresponding to two adjacent columns of light-emitting units share the same power supply voltage signal line PVDD; and the pixel driving circuits 120 corresponding to two adjacent light emitting units 110 in the same row share at least one of the driving transistor, the reset transistor, the data writing transistor and the light emitting control transistor M.
In the present embodiment, it is possible to reduce the area of a part of the non-light-transmitting region 102 formed due to the reference voltage signal line Ref, to reduce the area of a part of the non-light-transmitting region 102 formed due to the power supply voltage signal line PVDD, and to reduce the area of a part of the non-light-transmitting region 102 formed due to at least one of the driving transistor, the reset transistor, the data writing transistor, and the light emission control transistor M. Since the area of the non-light-transmitting region 102 of the display panel is reduced, that is, the area of the light-transmitting region 101 of the display panel is increased, the transmittance of the reflected light formed by reflection from the touch subject is increased, and when the display panel performs fingerprint recognition, the reflected light formed by reflection from the touch subject 001 is more received by the fingerprint recognition unit 130, so that the amount of light signals received by the fingerprint recognition unit 130 is increased, and the sensitivity and accuracy of fingerprint recognition are enhanced.
Fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 10, on the basis of the foregoing embodiments, the display device 310 includes a display panel 311 according to an embodiment of the present invention.
The display device 310 provided in the embodiment of the present invention includes the display panel 311 in the above embodiment, and therefore, the display device 310 provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, which are not described herein again. Optionally, the display device 310 may be a mobile phone shown in fig. 10, or may also be a computer, a television, an intelligent wearable display device, and the like, which is not particularly limited in this embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display panel, comprising:
a plurality of light emitting cells arranged in a matrix;
a plurality of pixel driving circuits; each light-emitting unit is correspondingly and electrically connected with one pixel driving circuit;
at least one fingerprint recognition unit located at a backlight side of the light emitting unit;
a plurality of reference voltage signal lines for supplying a reference voltage signal to each of the pixel driving circuits;
a plurality of power supply voltage signal lines for supplying a power supply voltage to each of the pixel driving circuits;
wherein the display panel satisfies the following conditions:
the pixel driving circuits corresponding to two adjacent light-emitting units in the same row or the same column share at least one of a driving transistor, a reset transistor, a data writing transistor and a light-emitting control transistor;
the pixel driving circuits corresponding to two adjacent light-emitting units in the same row or the same column are in mirror symmetry with respect to the shared transistor.
2. The display panel according to claim 1, wherein if the pixel driving circuits corresponding to the light emitting units in two adjacent rows or two adjacent columns share the same reference voltage signal line;
the reference voltage signal line includes a widened portion overlapping with at least one metal layer in the pixel driving circuit and a connection portion; the widened portion has a line width larger than that of the connection portion.
3. The display panel according to claim 2, wherein the metal layer includes at least one of an anode of the light emitting unit, the power supply voltage signal line, a data voltage signal line, a transistor gate of the pixel driving circuit, and a transistor source drain of the pixel driving circuit.
4. The display panel according to claim 1, wherein if the pixel driving circuits corresponding to two adjacent columns of the light emitting units share the same power voltage signal line;
the power supply voltage signal line includes a widened portion overlapping with at least one metal layer in the pixel driving circuit and a connection portion; the widened portion has a line width larger than that of the connection portion.
5. The display panel according to claim 4, wherein the metal layer includes at least one of an anode of the light emitting unit, a reference voltage signal line, a transistor gate of the pixel driving circuit, and a transistor source drain of the pixel driving circuit.
6. The display panel according to claim 1, wherein if the pixel driving circuits corresponding to the light emitting units in two adjacent rows or two adjacent columns share the same reference voltage signal line;
and the pixel driving circuits in two adjacent rows or two adjacent columns are in mirror symmetry with respect to the shared reference voltage signal line.
7. The display panel according to claim 1, wherein if the pixel driving circuits corresponding to two adjacent columns of the light emitting units share the same power voltage signal line; the pixel driving circuits in two adjacent columns are in mirror symmetry with respect to the common power supply voltage signal line.
8. The display panel according to claim 1, wherein the light emitting unit is used as a light source of the fingerprint recognition unit, and light emitted by the light emitting unit is reflected by the touch subject to form reflected light, and the reflected light is incident on the fingerprint recognition unit for fingerprint recognition.
9. The display panel according to claim 1, further comprising a fingerprint recognition light source located on a non-light-sensitive side of the fingerprint recognition unit;
the light emitted by the fingerprint identification light source is reflected by the touch main body to form reflected light, and the reflected light enters the fingerprint identification unit to perform fingerprint identification.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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| CN110299085B (en) * | 2019-06-28 | 2021-08-10 | 上海天马微电子有限公司 | Display panel and display device |
| US11086452B2 (en) | 2019-11-27 | 2021-08-10 | Au Optronics Corporation | Pixel array substrate |
| CN115240585B (en) * | 2022-06-27 | 2023-07-18 | 惠科股份有限公司 | Display driving circuit and display device |
| CN116013202A (en) * | 2023-01-30 | 2023-04-25 | 惠科股份有限公司 | Pixel driving circuit, display panel and electronic equipment |
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| CN107025451B (en) * | 2017-04-27 | 2019-11-08 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN107622749B (en) * | 2017-09-08 | 2019-10-01 | 上海天马有机发光显示技术有限公司 | A kind of display panel, electroluminescence display panel and display device |
| CN107819018B (en) * | 2017-10-31 | 2020-11-10 | 武汉天马微电子有限公司 | Electroluminescent display panel and display device |
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