Display panel and display device

Abstract

The present application discloses a display panel and a display device. The display panel comprises a photosensitive display circuit, wherein the photosensitive display circuit includes a light-emitting diode (LED), a pixel driver circuit, and a photosensitive circuit. By multiplexing LEDs, not only can a normal image display be achieved, but also light detection based on a photogenerated current flowing through the LED, so that no additional light sensor is required, thus reducing the cost and size of a display product.

Description

Display panel and display device Technical Field

[0001] The present application relates to the field of display panel manufacturing, and in particular to a display panel and a display device. Background Art

[0002] Currently, the display panels of various electronic devices require not only improved display characteristics, such as faster refresh rates, higher resolutions, and better color performance, but also greater interactivity to attract more users. To increase user interactivity, more technologies are being integrated into display panels, such as touch, cameras, ambient light detection, and fingerprint recognition. However, these interactivity solutions generally require the use of corresponding sensors.

[0003] However, these sensors still need to be integrated into the display panel, which increases the cost and size of the display panel. Technical issues

[0004] The present application provides a display panel and a display device to alleviate the technical problem of requiring additional sensors for light detection. Technical Solutions

[0005] In the first aspect, the present application provides a display panel, which includes a photosensitive display circuit, the photosensitive display circuit includes a light-emitting diode, a pixel driving circuit, a row readout line and a row photosensitive data reader, the cathode of the light-emitting diode is electrically connected to the first power line; the pixel driving circuit is electrically connected to the data line, the first scan line, the second power line and the anode of the light-emitting diode; one end of the row readout line is electrically connected to the anode of the light-emitting diode; and the row photosensitive data reader is electrically connected to the other end of the row readout line to obtain a first photogenerated current flowing through the light-emitting diode.

[0006] In some embodiments, multiple light-emitting diodes and multiple pixel driving circuits are distributed in an array in the display panel; multiple first power lines are arranged in sequence along a first direction in the display panel, and a first power line is electrically connected to the cathode of a column of light-emitting diodes; multiple row readout lines are arranged in sequence along a second direction in the display panel, and a row of readout lines is electrically connected to a row of photosensitive data readers and anodes of a row of light-emitting diodes.

[0007] In some embodiments, the photosensitive display circuit further includes a column readout line and a column photosensitive data reader, one end of the column readout line is electrically connected to the cathode of the light-emitting diode; the column photosensitive data reader is electrically connected to the other end of the column readout line to obtain a second photogenerated current flowing through the light-emitting diode.

[0008] In some embodiments, multiple light-emitting diodes and multiple pixel driving circuits are distributed in an array in the display panel; multiple column readout lines are arranged in sequence along a first direction in the display panel, and a column readout line is electrically connected to a column of photosensitive data readers and a cathode of a column of light-emitting diodes; multiple row readout lines are arranged in sequence along a second direction in the display panel, and a row readout line is electrically connected to a row of photosensitive data readers and anodes of a row of light-emitting diodes.

[0009] In some embodiments, the photosensitive display circuit further includes a first transistor and a column photosensitive data reader, the first electrode of the first transistor is electrically connected to the cathode of the light-emitting diode, the gate of the first transistor is electrically connected to the second scan line, and the second electrode of the first transistor is electrically connected to the data line; the column photosensitive data reader is electrically connected to the data line to obtain a second photogenerated current flowing through the light-emitting diode.

[0010] In some embodiments, multiple light-emitting diodes and multiple pixel driving circuits are distributed in an array in the display panel; multiple data lines are arranged in sequence along a first direction in the display panel, and one data line is electrically connected to a column of photosensitive data readers and a second electrode of a column of first transistors; multiple row readout lines are arranged in sequence along a second direction in the display panel, and one row of readout lines is electrically connected to a row of photosensitive data readers and anodes of a row of light-emitting diodes.

[0011] In some embodiments, a frame of the photosensitive display circuit includes a display phase and a blank phase. In the display phase, the pixel driving circuit drives the light-emitting diode to display, and in the blank phase, the photocurrent flowing through the light-emitting diode is obtained.

[0012] In some embodiments, a frame of the photosensitive display circuit includes a display phase and a blank phase; in the display phase, the anode potential of the light-emitting diode is greater than the cathode potential of the light-emitting diode; in the blank phase, the anode potential of the light-emitting diode is less than or equal to the cathode potential of the light-emitting diode.

[0013] In some embodiments, one frame of the photosensitive display circuit includes a display phase and a blank phase; in the display phase, the pixel driving circuit in the mth row is scanned row by row through the corresponding first scanning line, and the first photocurrent of the light-emitting diode in the mkth row is obtained row by row through the row photosensitive data reader, wherein m and k are both integers greater than or equal to 1, and k is less than m; in the blank phase, the first photocurrent of the light-emitting diodes in the remaining rows is obtained row by row through the row photosensitive data reader.

[0014] In a second aspect, the present application provides a display device, which includes a display panel according to at least one of the above-mentioned embodiments, wherein at least a portion of the photosensitive circuit is located in a non-display area of ​​the display panel. Beneficial effects

[0015] The display panel and display device provided by the present application, by reusing light-emitting diodes, can not only achieve normal picture display when the light-emitting diodes are subjected to a forward bias voltage, but can also achieve light detection, i.e., determine the intensity and position of light according to the photocurrent flowing through the light-emitting diodes when the light-emitting diodes are subjected to a reverse bias voltage or a zero bias voltage. This saves the need for an external light sensor, thereby reducing the cost and size of the display product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a first circuit schematic diagram of a photosensitive display circuit provided in an embodiment of the present application.

[0017] FIG2 is a second circuit schematic diagram of a photosensitive display circuit provided in an embodiment of the present application.

[0018] FIG3 is a third circuit schematic diagram of the photosensitive display circuit provided in an embodiment of the present application.

[0019] FIG4 is a schematic diagram of the current of a light-emitting diode provided in an embodiment of the present application under a forward bias voltage.

[0020] FIG5 is a schematic diagram of the current of a light-emitting diode provided in an embodiment of the present application under zero bias voltage.

[0021] FIG6 is a schematic diagram of the current of a light-emitting diode provided in an embodiment of the present application under a reverse bias voltage.

[0022] FIG. 7 is a schematic structural diagram of the photosensitive display circuit shown in FIG. 1 in a display panel.

[0023] FIG. 8 is a timing diagram of the display panel shown in FIG. 7 .

[0024] FIG9 is a schematic structural diagram of the photosensitive display circuit shown in FIG2 and FIG3 in a display panel.

[0025] FIG. 10 is a timing diagram of the display panel shown in FIG. 9 .

[0026] FIG. 11 is another timing diagram of the display panel shown in FIG. 7 . Modes for Carrying Out the Invention

[0027] To make the purpose, technical solutions and effects of this application clearer and more specific, the following further describes this application in detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain this application and are not intended to limit this application.

[0028] In view of the aforementioned technical problem of requiring additional sensors for light detection, this embodiment provides a display panel, as shown in Figures 2 to 10. As shown in Figures 1, 2, and 3, the display panel includes a light-sensitive display circuit 300, which includes at least one of a light-emitting diode D1, a pixel driving circuit 100, a row readout line 230, and a row light-sensitive data reader 210. The cathode of the light-emitting diode D1 is electrically connected to the first power line 410. The pixel driving circuit 100 is electrically connected to the data line DL, the first scan line 430, the second power line 420, and the anode of the light-emitting diode D1. One end of the row readout line 230 is electrically connected to the anode of the light-emitting diode D1; the row light-sensitive data reader 210 is electrically connected to the other end of the row readout line 230 to obtain a first photogenerated current flowing through the light-emitting diode D1.

[0029] It can be understood that the display panel provided in this embodiment reuses the light-emitting diode D1 through the pixel driving circuit 100 and the photosensitive circuit 200, which can not only realize normal picture display when the light-emitting diode D1 is subjected to a forward bias voltage, but also realize light detection, that is, determine the intensity and position of light according to the photocurrent flowing through the light-emitting diode D1 when the light-emitting diode D1 is subjected to a reverse bias voltage or a zero bias voltage. This saves the need for an external light sensor, thereby reducing the cost and size of the display product.

[0030] It should be noted that, in this embodiment, when the anode potential of the light-emitting diode D1 is controlled to be lower than or equal to the cathode potential of the light-emitting diode D1 through the first power line 410, the first photocurrent flows from the anode of the light-emitting diode D1 to the row photosensitive data reader 210, and the row photosensitive data reader 210 can determine the current light intensity received by the display panel based on the magnitude of the first photocurrent.

[0031] It should be noted that the light-emitting diode D1 may be a mini light-emitting diode, a micro light-emitting diode, an organic light-emitting diode, or a quantum dot light-emitting diode. Referring to Figures 4 to 6 , the light-emitting diode D1 may be composed of a P region D11 of the light-emitting diode D1 , a PN junction D12 of the light-emitting diode D1 , and an N region D13 of the light-emitting diode D1 .

[0032] As shown in Figure 4, due to the properties of its PN junction D12, light-emitting diode D1 generates a forward current Ia when a forward voltage is applied. This is because holes injected from P region D11 into N region D13 and electrons injected from N region D13 into P region D11 recombine at PN junction D12 to produce radiant fluorescence, which can be used for display. PN junction D12 also has excellent photosensitivity. When light shines on PN junction D12, it generates free electrons and holes, increasing the concentration of minority carriers in the semiconductor. Under zero bias voltage (as shown in Figure 5) or negative bias voltage (as shown in Figure 6), the reverse current (Ib / Ic) increases linearly with increasing light intensity.

[0033] The pixel driving circuit 100 may be a 2T1C, 3T1C, 7T1C, 7T2C, 8T1C, or 9T2C structure, but the present application is not limited thereto. A pixel driving circuit 100 of other structures may also be employed. Taking 2T1C as an example, the pixel driving circuit 100 may include a write transistor T1, a drive transistor T2, and a storage capacitor C1. A first electrode of the write transistor T1 is electrically connected to the data line DL, a second electrode of the write transistor T1 is electrically connected to the gate of the drive transistor T2, and the gate of the write transistor T1 is electrically connected to the first scan line 430. A first electrode of the drive transistor T2 is electrically connected to the second power line 420, and a second electrode of the drive transistor T2 is electrically connected to the anode of the light-emitting diode D1. One end of the storage capacitor C1 is electrically connected to the gate of the drive transistor T2, and the other end of the storage capacitor C1 may be electrically connected to the second electrode of the drive transistor T2, the first power line 410, or the second power line 420.

[0034] The first electrode may be a drain or a source, and the second electrode may be the other of the drain or the source. For example, when the first electrode is a drain, the second electrode is a source; or when the first electrode is a source, the second electrode is a drain.

[0035] The data line DL is used to transmit the corresponding data signal data. The first scan line 430 is used to transmit the first scan signal WR. The first power line 410 is used to transmit the negative power signal VSS, and the second power line 420 is used to transmit the positive power signal VDD.

[0036] In one embodiment, the pixel driving circuit 100 may further include a sensing transistor T3, a first electrode of the sensing transistor T3 is electrically connected to the anode of the light-emitting diode D1, a gate of the sensing transistor T3 is electrically connected to the third scan line 440, and a second electrode of the sensing transistor T3 is electrically connected to the sensing line.

[0037] It should be noted that the third scan line 440 is used to transmit the second scan signal RD1. In this embodiment, the sensing transistor T3 can be turned on in a timely manner under the control of the third scan line 440 to obtain the source potential of the driving transistor T2 or reset the source potential of the driving transistor T2.

[0038] In one embodiment, as shown in Figures 2 and 7, multiple light-emitting diodes D1 and multiple pixel driving circuits 100 are distributed in an array in the display panel; multiple first power lines 410 are arranged in sequence along a first direction DR1 in the display panel, and a first power line 410 is electrically connected to the cathode of a column of light-emitting diodes D1; ​​multiple row readout lines 230 are arranged in sequence along a second direction DR2 in the display panel, and a row of readout lines 230 is electrically connected to a row of photosensitive data readers 210 and anodes of a row of light-emitting diodes D1.

[0039] It should be noted that the first direction DR1 may be an arrangement direction of the plurality of data lines DL, and the second direction DR2 may be an extension direction of the data lines DL; and / or the first direction DR1 and the second direction DR2 may intersect or be perpendicular to each other.

[0040] As shown in FIG2 and FIG7 , taking a display panel having M rows and N columns of photosensitive display circuits 300 as an example, the plurality of row readout lines 230 may include a first row readout line 2301, a second row readout line 2302, ..., an M-1th row readout line 230M-1, and an M-th row readout line 230M. There may be M row photosensitive data readers 210, for example, a first row photosensitive data reader, a second row photosensitive data reader, ..., an M-1th row photosensitive data reader, and an M-th row photosensitive data reader.

[0041] The first row readout line 2301 is electrically connected to the anodes of all the light-emitting diodes D1 in the first row of the display panel and the first row photosensitive data reader, the second row readout line 2302 is electrically connected to the anodes of all the light-emitting diodes D1 in the second row of the display panel and the second row photosensitive data reader, the M-1th row readout line 230M-1 is electrically connected to the anodes of all the light-emitting diodes D1 in the M-1th row of the display panel and the M-1th row photosensitive data reader, and the Mth row readout line 230M is electrically connected to the anodes of all the light-emitting diodes D1 in the Mth row of the display panel and the Mth row photosensitive data reader.

[0042] The plurality of first power lines 410 may include a first power line VS1, a first power line VS2, ..., a first power line VSN-1, and a first power line VSN. The first power line VS1 is electrically connected to the cathodes of all the light-emitting diodes D1 in the first column of the display panel, the first power line VS2 is electrically connected to the cathodes of all the light-emitting diodes D1 in the second column of the display panel, the first power line VSN-1 is electrically connected to the cathodes of all the light-emitting diodes D1 in the N-1th column of the display panel, and the first power line VSN is electrically connected to the cathodes of all the light-emitting diodes D1 in the Nth column of the display panel.

[0043] During the light detection process, the potential of the first power line 410 is increased and / or the potential of the row readout line 230 is decreased column by column, so that the anode potential of the LED D1 is lower than or equal to the cathode potential of the LED D1. At this point, the light intensity received by the display panel can be determined based on the detected photocurrent flowing through the LED D1. Simultaneously, the location of light exposure can be determined based on the number of columns light is detected (or a high potential is applied to the corresponding first power line 410) and the corresponding row of light-sensing data readers 210 that receives the photocurrent. For example, when light detection is performed on the LED D1 in the first column, if the light-sensing data reader in the first row receives the corresponding photocurrent, the area where the LED D1 located in the first row and first column is located is illuminated, and the location of light exposure can be determined accordingly.

[0044] In one embodiment, as shown in FIG8 , a frame F1 of the photosensitive display circuit 300 includes a display phase F11 and a blank phase F12. In the display phase F11, the pixel region driving circuit drives the light-emitting diode D1, and can control the anode potential of the light-emitting diode D1 to be greater than the cathode potential of the light-emitting diode D1, so that a light-emitting current flows through the light-emitting diode D1 for display. In the blank phase F12, the anode potential of the light-emitting diode D1 is controlled to be less than or equal to the cathode potential of the light-emitting diode D1, so that a photocurrent flowing through the light-emitting diode D1 can be obtained for light detection.

[0045] It should be noted that in the blank phase F12, light detection can be performed on each of the N columns of light-emitting diodes D1. Specifically, a high level of the display enable signal S1 can control the display panel to operate in the display phase F11, a low level of the display enable signal S1 can control the display panel to operate in the blank phase F12, and each pulse of the light detection enable signal S2 can control light detection on one column of light-emitting diodes D1.

[0046] In one embodiment, as shown in Figures 2 and 9, the photosensitive circuit 200 further includes a column readout line 240 and a column photosensitive data reader 220, one end of the column readout line 240 is electrically connected to the cathode of the light-emitting diode D1; a column photosensitive data reader 220 is electrically connected to the other end of the column readout line 240 to obtain a second photogenerated current flowing through the light-emitting diode D1.

[0047] It should be noted that the column light-sensing data reader 220 can obtain the photocurrent flowing through the light-emitting diode D1 when the cathode potential of the light-emitting diode D1 is higher than or equal to the anode potential of the light-emitting diode D1 .

[0048] In one embodiment, as shown in Figures 2 and 9, multiple light-emitting diodes D1 and multiple pixel driving circuits 100 are distributed in an array in the display panel; multiple column readout lines 240 are arranged in sequence along a first direction DR1 in the display panel, and a column readout line 240 is electrically connected to a column of photosensitive data readers 220 and a cathode of a column of light-emitting diodes D1; ​​multiple row readout lines 230 are arranged in sequence along a second direction DR2 in the display panel, and a row readout line 230 is electrically connected to a row of photosensitive data readers 210 and anodes of a row of light-emitting diodes D1.

[0049] It should be noted that the column readout lines 240 may include a first column readout line 2401, a second column readout line 2402, ..., an N-1th column readout line 240N-1, and an N-th column readout line 240N. The first column readout line 2401 is electrically connected to the cathode of the light-emitting diode D1 in the first column of the display panel and the first column of the light-sensitive data reader, the second column readout line 2402 is electrically connected to the cathode of the light-emitting diode D1 in the second column of the display panel and the second column of the light-sensitive data reader, the N-1th column readout line 240N-1 is electrically connected to the cathode of the light-emitting diode D1 in the N-1th column of the display panel and the N-1th column of the light-sensitive data reader, and the N-th column readout line 240N is electrically connected to the cathode of the light-emitting diode D1 in the Nth column of the display panel and the N-th column of the light-sensitive data reader.

[0050] In addition, this embodiment detects photogenerated current through the column readout line 240 and the column photosensitivity data reader 220. During row scanning or column scanning, the corresponding zero-bias voltage or reverse-bias voltage can be loaded on the light-emitting diode D1 through a separate column readout line and / or a sensing transistor T3, thereby reducing the influence of the display signal and further improving the sensitivity of light detection.

[0051] In one embodiment, as shown in Figures 3 and 9, the photosensitive circuit 200 further includes a first transistor T4 and a column photosensitive data reader 220, wherein the first electrode of the first transistor T4 is electrically connected to the cathode of the light-emitting diode D1, the gate of the first transistor T4 is electrically connected to the second scan line 450, and the second electrode of the first transistor T4 is electrically connected to the data line DL; the column photosensitive data reader 220 is electrically connected to the data line DL to obtain the second photogenerated current flowing through the light-emitting diode D1.

[0052] It should be noted that this embodiment uses data lines DL to replace the column readout lines 240 of the previous example, thereby saving the required column readout lines 240 and reducing the occupied space of the display area of ​​the display panel.

[0053] During the light detection process, since it is in the blank phase F12 , the data line DL is idle, and the first transistor T4 can be controlled to conduct to perform row scanning for light detection, which can be combined with column scanning for light detection to achieve light detection.

[0054] The second scan line 450 is used to transmit the third scan signal RD2.

[0055] In one embodiment, as shown in Figures 3 and 9, multiple light-emitting diodes D1 and multiple pixel driving circuits 100 are distributed in an array in the display panel; multiple data lines DL are arranged in sequence along a first direction DR1 in the display panel, and one data line DL is electrically connected to a column of photosensitive data readers 220 and a second electrode of a column of first transistors T4; multiple row readout lines 230 are arranged in sequence along a second direction DR2 in the display panel, and one row of readout lines 230 is electrically connected to a row of photosensitive data readers 210 and anodes of a row of light-emitting diodes D1.

[0056] It should be noted that the multiple data lines DL may include a first data line DL1, a second data line DL2, ..., an N-1th data line DLN-1, and an Nth data line DLN. The first data line DL1 is electrically connected to the second electrode of the first transistor T4 in the first column of the display panel and the first column light-sensitive data reader, the second data line DL2 is electrically connected to the second electrode of the first transistor T4 in the second column of the display panel and the second column light-sensitive data reader, the N-1th data line DLN-1 is electrically connected to the second electrode of the first transistor T4 in the N-1th column of the display panel and the N-1th column light-sensitive data reader, and the Nth data line DLN is electrically connected to the second electrode of the first transistor T4 in the Nth column of the display panel and the N column light-sensitive data reader.

[0057] Specifically, during the column scan process, light detection simultaneously inputs a high potential to N column readout lines 240 or data lines DL, causing the cathode potential of LED D1 to be greater than or equal to the anode potential of LED D1. At this point, the reverse current or photocurrent is detected by the row photosensitive data reader 210 corresponding to each row, thereby determining the row location of the illumination. During the row scan process, no bias voltage is applied to LED D1. That is, at zero bias voltage, the photocurrent still flows from N region D13 to P region D11. At this point, the reverse current or photocurrent generated by external light is detected by the column photosensitive data reader 220 corresponding to each column, thereby determining the column location of the illumination. Based on the row and column locations, the illumination location can be accurately determined. The corresponding illumination intensity can also be determined based on the magnitude of the photocurrent read.

[0058] As shown in FIG10 , during the light detection process, since each row of LEDs D1 has a corresponding row light-sensing data reader 210 and each column of LEDs D1 has a corresponding column light-sensing data reader 220, M rows of LEDs D1 and N columns of LEDs D1 can be scanned simultaneously. Compared to the timing sequence shown in FIG8 , the light detection enable signal S2 shown in FIG10 only requires two pulses in a blank period F12 to complete light detection. One pulse can simultaneously detect M rows of LEDs D1, and the other pulse can simultaneously detect N columns of LEDs D1. The intensity and location of the light can then be determined based on the light detection process described in detail above. Therefore, compared to FIG8 , which requires N light detections in a blank period F12, the timing sequence shown in FIG10 greatly shortens the light detection time, facilitating application in higher-resolution display panels.

[0059] In one embodiment, as shown in FIG11 , the display panel includes a plurality of first scan lines 430 , which are sequentially scanned by scan signals G1 , G2 . . . G k , G k+1... G m During the display timing of the display phase, the pixel driving circuit 100 in each row is scanned row by row through the corresponding first scan line 430. The first photocurrent of the light-emitting diodes D1 in each row is acquired row by row through the row photosensitive data reader 210 during each pulse (1, 2, ..., mk). Then, during the blank phase, the first photocurrent of the light-emitting diodes D1 in the remaining rows is acquired row by row through the row photosensitive data reader 210.

[0060] For example, since the panel can realize the functions of display and detection at the same time, for the m rows of light emitting diodes D1 or pixel driving circuits 100, during the process of row-by-row scanning, the kth row (corresponding to the scanning signal G k The light emitting diode D1 in the k+1 row (corresponding to the scanning signal G) is on and is in the display state, and the light emitting diode D1 in the first row can be synchronously read by light sensing (corresponding to the pulse 1 in Detection); k+1 The LED D1 in the mth row is in the display state when it is on (corresponding to the pulse of the Detection signal). The LED D1 in the second row can be read synchronously (corresponding to the pulse 2 in the Detection signal). And so on until the mth row (corresponding to the scanning signal G k+1 When the LED D1 in row mk is on (corresponding to the pulse mk in Detection), it is in the display state, and the LED D1 in row mk can be read synchronously (corresponding to the pulse mk in Detection). At this point, the display scan ends for this frame; however, the light reading of the LED D1 in only some rows has been completed at this time, so the light reading of the LED D1 in the remaining rows can be performed during the blanking phase (V-Blanking).

[0061] It is understandable that performing display scanning and photosensitive reading on different rows simultaneously can significantly save reading time. It should be noted that in one frame, the photosensitive reading is of the LED array that has been display scanned.

[0062] Wherein, m and k are both integers greater than or equal to 1, and k is less than m. Specifically, k can also be 3, 4, 5, etc. Preferably, k is equal to 3, so that as many light-emitting diode arrays as possible can be photosensitively read during the display scanning process, and the display scanning process can be better avoided from being affected.

[0063] In one embodiment, this embodiment provides a display device, which includes the display panel of at least one of the above embodiments, and at least a portion of the photosensitive circuit 200 is located in a non-display area of ​​the display panel.

[0064] It can be understood that since the display device provided in this embodiment includes the display panel of at least one of the above-mentioned embodiments, it can also reuse the light-emitting diode D1, not only to achieve normal picture display when the light-emitting diode D1 is subjected to a forward bias voltage, but also to achieve light detection, that is, determine the intensity and position of the light according to the photocurrent flowing through the light-emitting diode D1 when the light-emitting diode D1 is subjected to a reverse bias voltage or a zero bias voltage. This saves the need for an external light sensor, thereby reducing the cost and size of the display product.

[0065] Furthermore, since at least part of the photosensitive circuit 200, for example, at least one of the column photosensitive data readers 220 and the row photosensitive data readers 210, can be constructed in the non-display area of ​​the display panel, this reduces the occupied space of the display area of ​​the display panel, which is conducive to maximizing the area of ​​the display area.

[0066] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this application, and all these changes or substitutions should fall within the scope of protection of the claims attached to this application.

Claims

1. A display panel, the display panel comprising a photosensitive display circuit, the photosensitive display circuit include: a light emitting diode, wherein a cathode of the light emitting diode is electrically connected to the first power line; A pixel driving circuit, wherein the pixel driving circuit is electrically connected to the data line, the first scan line, the second power line and the anode of the light emitting diode; a row readout line, one end of which is electrically connected to the anode of the light emitting diode; and A row photosensitive data reader is electrically connected to the other end of the row readout line to obtain a first photocurrent flowing through the light emitting diode.

2. The display panel according to claim 1, in, The plurality of light emitting diodes and the plurality of pixel driving circuits are distributed in an array in the display panel; A plurality of the first power lines are sequentially arranged along a first direction in the display panel, and one of the first power lines is electrically connected to the cathodes of a column of the light emitting diodes; A plurality of the row readout lines are sequentially arranged along the second direction in the display panel, and one row readout line is electrically connected to one row of the photosensitivity data reader and an anode of a row of the light emitting diodes.

3. The display panel according to claim 1, in, The photosensitive display circuit also includes: a column readout line, one end of which is electrically connected to the cathode of the light emitting diode; A column light-sensitive data reader is electrically connected to the other end of the column readout line to obtain a second photocurrent flowing through the light-emitting diode.

4. The display panel according to claim 3, in, The plurality of light emitting diodes and the plurality of pixel driving circuits are distributed in an array in the display panel; A plurality of column readout lines are sequentially arranged along a first direction in the display panel, and one column readout line is electrically connected to one column of photosensitivity data readers and a cathode of one column of light emitting diodes; A plurality of the row readout lines are sequentially arranged along the second direction in the display panel, and one row readout line is electrically connected to one row of the photosensitivity data reader and an anode of a row of the light emitting diodes.

5. The display panel according to claim 1, in, The photosensitive display circuit also includes: a first transistor, wherein a first electrode of the first transistor is electrically connected to a cathode of the light emitting diode, a gate of the first transistor is electrically connected to a second scanning line, and a second electrode of the first transistor is electrically connected to the data line; A column light-sensitive data reader is electrically connected to the data line to obtain a second photocurrent flowing through the light-emitting diode.

6. The display panel according to claim 5, in, The plurality of light emitting diodes and the plurality of pixel driving circuits are distributed in an array in the display panel; A plurality of data lines are sequentially arranged along a first direction in the display panel, and one data line is electrically connected to one column of the light-sensitive data readers and one column of the second electrodes of the first transistors; A plurality of the row readout lines are sequentially arranged along the second direction in the display panel, and one row readout line is electrically connected to one row of the photosensitivity data reader and an anode of a row of the light emitting diodes.

7. The display panel according to claim 1, in, One frame of the photosensitive display circuit includes a display phase and a blank phase. In the display phase, the pixel driving circuit drives the light emitting diode to display, and in the blank phase, the photocurrent flowing through the light emitting diode is obtained.

8. The display panel according to claim 1, in, One frame of the photosensitive display circuit includes a display phase and a blank phase; in the display phase, the anode potential of the light-emitting diode is greater than the cathode potential of the light-emitting diode; in the blank phase, the anode potential of the light-emitting diode is less than or equal to the cathode potential of the light-emitting diode.

9. The display panel according to claim 1, in, One frame of the photosensitive display circuit includes a display phase and a blank phase; In the display stage, the pixel driving circuit in the mth row is scanned row by row corresponding to the first scanning line, and the first photo-generated current of the light-emitting diode in the mkth row is acquired row by row through the row photosensitive data reader, wherein m and k are both integers greater than or equal to 1, and k is less than m; In the blank phase, the first photocurrents of the light emitting diodes in the remaining rows are acquired row by row through the row photosensitivity data reader.

10. A display device, comprising the display panel according to claim 1, wherein at least a portion of the photosensitive circuit is located in a non-display area of ​​the display panel.

11. The display device according to claim 10, in, The plurality of light emitting diodes and the plurality of pixel driving circuits are distributed in an array in the display panel; A plurality of the first power lines are sequentially arranged along a first direction in the display panel, and one of the first power lines is electrically connected to the cathodes of a column of the light emitting diodes; A plurality of the row readout lines are sequentially arranged along the second direction in the display panel, and one row readout line is electrically connected to one row of the photosensitivity data reader and an anode of a row of the light emitting diodes.

12. The display device according to claim 10, in, The photosensitive display circuit also includes: a column readout line, one end of which is electrically connected to the cathode of the light emitting diode; A column light-sensitive data reader is electrically connected to the other end of the column readout line to obtain a second photocurrent flowing through the light-emitting diode.

13. The display device according to claim 12, in, The plurality of light emitting diodes and the plurality of pixel driving circuits are distributed in an array in the display panel; A plurality of column readout lines are sequentially arranged along a first direction in the display panel, and one column readout line is electrically connected to one column of photosensitivity data readers and a cathode of one column of light emitting diodes; A plurality of the row readout lines are sequentially arranged along the second direction in the display panel, and one row readout line is electrically connected to one row of the photosensitivity data reader and an anode of a row of the light emitting diodes.

14. The display device according to claim 10, in, The photosensitive display circuit also includes: a first transistor, wherein a first electrode of the first transistor is electrically connected to a cathode of the light emitting diode, a gate of the first transistor is electrically connected to a second scanning line, and a second electrode of the first transistor is electrically connected to the data line; A column light-sensitive data reader is electrically connected to the data line to obtain a second photocurrent flowing through the light-emitting diode.

15. The display device according to claim 14, in, The plurality of light emitting diodes and the plurality of pixel driving circuits are distributed in an array in the display panel; A plurality of data lines are sequentially arranged along a first direction in the display panel, and one data line is electrically connected to one column of the light-sensitive data readers and one column of the second electrodes of the first transistors; A plurality of the row readout lines are sequentially arranged along the second direction in the display panel, and one row readout line is electrically connected to one row of the photosensitivity data reader and an anode of a row of the light emitting diodes.

16. The display device according to claim 10, in, One frame of the photosensitive display circuit includes a display phase and a blank phase. In the display phase, the pixel driving circuit drives the light emitting diode to display, and in the blank phase, the photocurrent flowing through the light emitting diode is obtained.

17. The display device according to claim 10, in, One frame of the photosensitive display circuit includes a display phase and a blank phase; in the display phase, the anode potential of the light-emitting diode is greater than the cathode potential of the light-emitting diode; in the blank phase, the anode potential of the light-emitting diode is less than or equal to the cathode potential of the light-emitting diode.

18. The display device according to claim 10, in, One frame of the photosensitive display circuit includes a display phase and a blank phase; In the display stage, the pixel driving circuit in the mth row is scanned row by row corresponding to the first scanning line, and the first photo-generated current of the light-emitting diode in the mkth row is acquired row by row through the row photosensitive data reader, wherein m and k are both integers greater than or equal to 1, and k is less than m; In the blank phase, the first photocurrents of the light emitting diodes in the remaining rows are acquired row by row through the row photosensitivity data reader.

19. The display device according to claim 10, in, The light emitting diode is one of a mini light emitting diode, a micro light emitting diode, an organic light emitting diode or a quantum dot light emitting diode.

20. The display device according to claim 10, in, The pixel driving circuit includes a write transistor, a drive transistor and a storage capacitor, the first electrode of the write transistor is electrically connected to the data line, the second electrode of the write transistor is electrically connected to the gate of the drive transistor, and the gate of the write transistor is electrically connected to the first scan line; the first electrode of the drive transistor is electrically connected to the second power line, and the second electrode of the drive transistor is electrically connected to the anode of the light-emitting diode; one end of the storage capacitor is electrically connected to the gate of the drive transistor, and the other end of the storage capacitor is electrically connected to the second electrode of the drive transistor, the first power line or one of the second power lines.

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