Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a light-sensing display circuit, and the light-sensing display circuit comprises a light-emitting diode, a pixel driving circuit and a light-sensing circuit. By multiplexing the light-emitting diode, normal picture display can be realized, and light detection can be realized according to the photo-generated current flowing through the light-emitting diode. Therefore, an additional light sensor is saved, and the cost and size of a display product are reduced.

Description

TECHNICAL FIELD

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

[0002] Currently, display panels of electronic devices need not only better display characteristics, such as faster refresh rate, higher resolution and better color performance, but also better interactivity to attract more users. To increase the interactivity with users, more technologies are integrated into the display panel, such as touch, camera, ambient light detection, fingerprint recognition, etc. However, these schemes for realizing interactivity usually need to use corresponding sensors.

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

[0004] The present application provides a display panel and a display device to alleviate the technical problem that light detection needs additional sensors.

[0005] In a first aspect, the present application provides a display panel, comprising a light-sensing display circuit, the light-sensing display circuit comprising a light-emitting diode, a pixel driving circuit, a row readout line and a row light-sensing data readout, the cathode of the light-emitting diode being electrically connected to a first power supply line; the pixel driving circuit being electrically connected to a data line, a first scan line, a second power supply line and the anode of the light-emitting diode; one end of the row readout line being electrically connected to the anode of the light-emitting diode; the row light-sensing data readout being electrically connected to the other end of the row readout line to obtain a first photo-generated current flowing through the light-emitting diode.

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

[0007] In some embodiments, the light-sensing display circuit further comprises a column readout line and a column light-sensing data readout, one end of the column readout line being electrically connected to the cathode of the light-emitting diode; the column light-sensing data readout being electrically connected to the other end of the column readout line to obtain a second photo-generated current flowing through the light-emitting diode.

[0008] In some embodiments, the plurality of light emitting diodes and the plurality of pixel driving circuits are arranged in an array in the display panel; a plurality of column readout lines are arranged in the display panel along a first direction in sequence, one column readout line is electrically connected with one column of the light sensing data readout and one column of cathodes of the light emitting diodes; a plurality of row readout lines are arranged in the display panel along a second direction in sequence, one row readout line is electrically connected with one row of the light sensing data readout and one row of anodes of the light emitting diodes.

[0009] In some embodiments, the light sensing display circuit further comprises a first transistor and a column light sensing data readout, a first electrode of the first transistor is electrically connected with the cathode of the light emitting diode, a gate electrode of the first transistor is electrically connected with the second scan line, and a second electrode of the first transistor is electrically connected with the data line; the column light sensing data readout is electrically connected with the data line to obtain the second photo-generated current flowing through the light emitting diode.

[0010] In some embodiments, the plurality of light emitting diodes and the plurality of pixel driving circuits are arranged in an array in the display panel; a plurality of data lines are arranged in the display panel along a first direction in sequence, one data line is electrically connected with one column of the light sensing data readout and one column of second electrodes of the first transistor; a plurality of row readout lines are arranged in the display panel along a second direction in sequence, one row readout line is electrically connected with one row of the light sensing data readout and one row of anodes of the light emitting diodes.

[0011] In some embodiments, one frame of the light sensing display circuit comprises a display stage and a blank stage, in the display stage, the pixel driving circuit drives the light emitting diode to display, and in the blank stage, the photo-generated current flowing through the light emitting diode is obtained.

[0012] In some embodiments, one frame of the light sensing display circuit comprises a display stage and a blank stage; in the display stage, the anode potential of the light emitting diode is greater than the cathode potential of the light emitting diode; in the blank stage, 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 light sensing display circuit comprises a display stage and a blank stage; in the display stage, the pixel driving circuit in the mth row is scanned row by row by the corresponding first scan line, and the first photo-generated current of the light emitting diode in the m-kth row is obtained row by row by the row light sensing data readout, wherein m and k are both integers greater than or equal to 1, and k is less than m; in the blank stage, the first photo-generated current of the light emitting diode in the remaining rows is obtained row by row by the row light sensing data readout.

[0014] In a second aspect, the present application provides a display device, which comprises the display panel in at least one of the above embodiments, and at least part of the light sensing circuit is located in a non-display area of the display panel.

[0015] The display panel and display device provided in this application, by reusing light-emitting diodes, can not only achieve normal image display when the light-emitting diodes are subjected to forward bias voltage, but also achieve light detection based on the photocurrent flowing through the light-emitting diodes when the light-emitting diodes are subjected to reverse bias voltage or zero bias voltage, that is, determine the intensity and position of the light. This saves the need for an external light sensor, thereby reducing the cost and size of the display product. Attached Figure Description

[0016] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0017] Figure 1 This is a first circuit schematic diagram of a photosensitive display circuit provided in an embodiment of this application.

[0018] Figure 2 This is a second circuit schematic diagram of the photosensitive display circuit provided in an embodiment of this application.

[0019] Figure 3 This is a third circuit schematic diagram of the photosensitive display circuit provided in the embodiments of this application.

[0020] Figure 4 This is a schematic diagram of the current of a light-emitting diode under forward bias voltage, provided in an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the current of a light-emitting diode under zero bias voltage, provided in an embodiment of this application.

[0022] Figure 6 This is a schematic diagram of the current of a light-emitting diode under reverse bias voltage, provided in an embodiment of this application.

[0023] Figure 7 for Figure 1 The diagram shows the structure of the photosensitive display circuit in the display panel.

[0024] Figure 8 for Figure 7 The diagram shows a timing schematic of a display panel.

[0025] Figure 9 for Figure 2 , Figure 3 The diagram shows the structure of the photosensitive display circuit in the display panel.

[0026] Figure 10 for Figure 9 The timing diagram of the display panel is shown.

[0027] Figure 11 for Figure 7 Another timing diagram of the display panel shown. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application.

[0029] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, so that the features with "first", "second" can explicitly or implicitly include one or more of the features, and in the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0030] In view of the technical problem of additional increase of sensors required by the above-mentioned light detection, the present embodiment provides a display panel, please refer to Figures 2 to 10 As shown in Figure 1 , Figure 2 , Figure 3 The display panel includes a light sensing display circuit 300, and the light sensing display circuit 300 includes at least one of a light emitting diode D1, a pixel driving circuit 100, a row readout line 230 and a row light sensing data readout 210. The cathode of the light emitting diode D1 is electrically connected with a first power supply line 410. The pixel driving circuit 100 is electrically connected with a data line DL, a first scan line 430, a second power supply line 420 and an anode of the light emitting diode D1. One end of the row readout line 230 is electrically connected with the anode of the light emitting diode D1; the row light sensing data readout 210 is electrically connected with the other end of the row readout line 230 to obtain the first photo-generated current flowing through the light emitting diode D1.

[0031] It can be understood that the display panel provided by the present embodiment multiplexes the light emitting diode D1 through the pixel driving circuit 100 and the light sensing circuit 200, which not only can realize normal picture display in the case that the light emitting diode D1 bears a positive bias voltage, but also can realize light detection, i.e. determine the intensity and position of illumination, according to the photo-generated current flowing through the light emitting diode D1 in the case that the light emitting diode D1 bears a reverse bias voltage or a zero bias voltage, which saves the need for an additional light sensor, and further reduces the cost and size of the display product.

[0032] It needs to be explained that in the 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 by the first power line 410, the first photo-generated current 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 light intensity currently received by the display panel according to the size of the first photo-generated current.

[0033] It needs to be explained that the light-emitting diode D1 can be a mini light-emitting diode, a micro light-emitting diode, an organic light-emitting diode or a quantum dot light-emitting diode. Please refer to Figures 4 to 6 , wherein the light-emitting diode D1 can 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.

[0034] , as shown in Figure 4 , the light-emitting diode D1 based on the properties of the PN junction D12 thereof, when a forward voltage is applied to the light-emitting diode D1, a forward current Ia is generated, that is, the holes injected from the P region D11 to the N region D13 and the electrons injected from the N region D13 to the P region D11 recombine at the PN junction D12 to generate radiated fluorescent light which can be used for display. At the same time, the PN junction D12 also has good photosensitive properties, when light irradiates the PN junction D12, free electrons and holes are generated, so that the concentration of minority carriers in the semiconductor is increased, and as shown in Figure 5 , under zero bias voltage or as shown in Figure 6 , under negative bias voltage, the reverse current (Ib / Ic) increases linearly with the increase of light intensity.

[0035] , wherein the pixel driving circuit 100 can be 2T1C, 3T1C, 7T1C, 7T2C, 8T1C or 9T2C structure, and the present application is not limited thereto, but also can be other structures of the pixel driving circuit 100. Taking 2T1C as an example, the pixel driving circuit 100 can include a write transistor T1, a drive transistor T2 and a storage capacitor C1, the first electrode of the write transistor T1 is electrically connected with a data line DL, the second electrode of the write transistor T1 is electrically connected with the gate electrode of the drive transistor T2, and the gate electrode of the write transistor T1 is electrically connected with a first scan line 430. The first electrode of the drive transistor T2 is electrically connected with a second power line 420, and the second electrode of the drive transistor T2 is electrically connected with the anode of the light-emitting diode D1. One end of the storage capacitor C1 is electrically connected with the gate electrode of the drive transistor T2, and the other end of the storage capacitor C1 can be electrically connected with the second electrode of the drive transistor T2, the first power line 410 or the second power line 420.

[0036] The first electrode can be one of the drain electrode or the source electrode, and the second electrode can be the other of the drain electrode or the source electrode. For example, when the first electrode is the drain electrode, the second electrode is the source electrode; or when the first electrode is the source electrode, the second electrode is the drain electrode.

[0037] The data line DL is used to transmit a corresponding data signal data. The first scan line 430 is used to transmit a first scan signal WR. The first power line 410 is used to transmit a power negative signal VSS, and the second power line 420 is used to transmit a power positive signal VDD.

[0038] In one of the embodiments, the pixel driving circuit 100 can further include a sensing transistor T3, a first electrode of the sensing transistor T3 is electrically connected with the anode of the light-emitting diode D1, a gate electrode of the sensing transistor T3 is electrically connected with the third scan line 440, and a second electrode of the sensing transistor T3 is electrically connected with a sensing line.

[0039] It should be noted that the third scan line 440 is used to transmit a second scan signal RD1. The embodiment can timely turn on the sensing transistor T3 under the control of the third scan line 440, so as to obtain the source potential of the driving transistor T2 or reset the source potential of the driving transistor T2.

[0040] In one of the embodiments, as shown in Figure 2 、 Figure 7 , the plurality of light-emitting diodes D1 and the plurality of pixel driving circuits 100 are arrayed in the display panel; the plurality of first power lines 410 are arranged in the display panel along a first direction DR1, and a first power line 410 is electrically connected with the cathode of a column of light-emitting diodes D1; and the plurality of row readout lines 230 are arranged in the display panel along a second direction DR2, and a row readout line 230 is electrically connected with a row of light-sensing data readers 210 and a row of anodes of light-emitting diodes D1.

[0041] It should be noted that the first direction DR1 can be the arrangement direction of the plurality of data lines DL, and the second direction DR2 can be the extension direction of the data line DL; and / or, the first direction DR1 and the second direction DR2 intersect or are perpendicular to each other.

[0042] As shown in Figure 2 、 Figure 7 , taking the display panel having M rows and N columns of light-sensing display circuits 300 as an example, the plurality of row readout lines 230 can include a first row readout line 2301, a second row readout line 2302,..., an (M-1)th row readout line 230M-1, and an Mth row readout line 230M. The light-sensing data reader 210 can have M, for example, a first row light-sensing data reader, a second row light-sensing data reader,..., an (M-1)th row light-sensing data reader, and an Mth row light-sensing data reader.

[0043] The first row readout line 2301 is electrically connected to the anode of all LEDs 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 anode of all LEDs D1 in the second row of the display panel and the second row photosensitive data reader. The (M-1)th row readout line 230M-1 is electrically connected to the anode of all LEDs D1 in the (M-1)th row of the display panel and the (M-1)th row photosensitive data reader. The Mth row readout line 230M is electrically connected to the anode of all LEDs D1 in the Mth row of the display panel and the Mth row photosensitive data reader.

[0044] Multiple first power lines 410 may include first power line VS1, first power line VS2... first power line VSN-1, and first power line VSN. First power line VS1 is electrically connected to the cathodes of all light-emitting diodes D1 in the first column of the display panel; first power line VS2 is electrically connected to the cathodes of all light-emitting diodes D1 in the second column of the display panel; first power line VSN-1 is electrically connected to the cathodes of all light-emitting diodes D1 in the (N-1)th column of the display panel; and first power line VSN is electrically connected to the cathodes of all light-emitting diodes D1 in the Nth column of the display panel.

[0045] During light detection, 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 light-emitting diode D1 is lower than or equal to the cathode potential of the light-emitting diode D1. At this time, the light intensity received by the display panel can be determined based on the detected photocurrent flowing through the light-emitting diode D1. At the same time, the position of the illumination can be determined based on the column number of light detection (or by applying a high potential to the corresponding first power line 410) and the corresponding row photosensitive data reader 210 that has obtained the photocurrent. For example, when light detection is performed on the light-emitting diode D1 in the first column, if the first row photosensitive data reader obtains the corresponding photocurrent, then the area where the light-emitting diode D1 in the first row and first column is located is illuminated, and the position of the illumination can be determined in this way.

[0046] In one embodiment, such as Figure 8 As shown, 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 area 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 the 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 the photocurrent flowing through the light-emitting diode D1 can be obtained for light detection.

[0047] It should be noted that in the blank phase F12, the N columns of light emitting diodes D1 can be detected column by column. Specifically, the high potential of the display enable signal S1 can control the display panel to work in the display phase F11, the low potential of the display enable signal S1 can control the display panel to work in the blank phase F12, and each pulse of the light detection enable signal S2 can control a column of light emitting diodes D1 to perform light detection.

[0048] In one embodiment, as shown in Figure 2 , Figure 9 The photosensitive circuit 200 further includes a column readout line 240 and a column photosensitive data readout 220. One end of the column readout line 240 is electrically connected to the cathode of the light emitting diode D1, and the other end of the column readout line 240 is electrically connected to the column photosensitive data readout 220 to obtain the second photo-generated current flowing through the light emitting diode D1.

[0049] It should be noted that the column photosensitive data readout 220 can obtain the photo-generated current 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.

[0050] In one embodiment, as shown in Figure 2 , Figure 9 The plurality of light emitting diodes D1 and the plurality of pixel driving circuits 100 are arranged in an array in the display panel. A plurality of column readout lines 240 are arranged in the display panel along a first direction DR1 in sequence, and one column readout line 240 is electrically connected to one column photosensitive data readout 220 and the cathode of one light emitting diode D1. A plurality of row readout lines 230 are arranged in the display panel along a second direction DR2 in sequence, and one row readout line 230 is electrically connected to one row photosensitive data readout 210 and the anode of one light emitting diode D1.

[0051] It should be noted that the column readout line 240 can include a first column readout line 2401, a second column readout line 2402,..., an (N-1)th column readout line 240N-1, and an Nth 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 in the display panel and the first column photosensitive data readout, the second column readout line 2402 is electrically connected to the cathode of the light emitting diode D1 in the second column in the display panel and the second column photosensitive data readout, the (N-1)th column readout line 240N-1 is electrically connected to the cathode of the light emitting diode D1 in the (N-1)th column in the display panel and the (N-1)th column photosensitive data readout, and the Nth column readout line 240N is electrically connected to the cathode of the light emitting diode D1 in the Nth column in the display panel and the Nth column photosensitive data readout.

[0052] In addition, the embodiment detects the photo-generated current through the column readout line 240 and the column photosensitive data readout 220. In the process of row scanning or column scanning, the corresponding zero bias voltage or reverse bias voltage can be loaded for the light-emitting diode D1 through the separate column readout line and / or the sensing transistor T3, which reduces the influence of the display signal and further improves the sensitivity of the light detection.

[0053] In one embodiment, as shown in Figure 3 、 Figure 9 The photosensitive circuit 200 further includes a first transistor T4 and a column photosensitive data readout 220. 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 readout 220 is electrically connected to the data line DL to obtain the second photo-generated current flowing through the light-emitting diode D1.

[0054] It should be noted that the embodiment uses the data line DL instead of the column readout line 240 of the previous embodiment, which saves the required column readout line 240 and reduces the occupied space of the display area of the display panel.

[0055] In the process of light detection, since it is in the blank phase F12, the data line DL is idle at this time, and the first transistor T4 can be controlled to be turned on for row scanning of light detection, and then column scanning of light detection can be realized.

[0056] The second scan line 450 is used to transmit a third scan signal RD2.

[0057] In one embodiment, as shown in Figure 3 、 Figure 9 The plurality of light-emitting diodes D1 and the plurality of pixel driving circuits 100 are arranged in an array in the display panel. The plurality of data lines DL are arranged in the display panel along the first direction DR1 in sequence, and one data line DL is electrically connected to one column photosensitive data readout 220 and the second electrode of one column first transistor T4. The plurality of row readout lines 230 are arranged in the display panel along the second direction DR2 in sequence, and one row readout line 230 is electrically connected to one row photosensitive data readout 210 and the anode of one row light-emitting diode D1.

[0058] It should be noted that the multiple data lines DL may include a first data line DL1, a second data line DL2, ... an (N-1)th data line DLN-1, and an Nth data line DLN. Specifically, the first data line DL1 is electrically connected to the second terminal of the first transistor T4 in the first column of the display panel and the first column photosensitive data reader; the second data line DL2 is electrically connected to the second terminal of the first transistor T4 in the second column of the display panel and the second column photosensitive data reader; the (N-1)th data line DLN-1 is electrically connected to the second terminal of the first transistor T4 in the (N-1)th column of the display panel and the (N-1)th column photosensitive data reader; and the Nth data line DLN is electrically connected to the second terminal of the first transistor T4 in the Nth column of the display panel and the Nth column photosensitive data reader.

[0059] Specifically, during column scanning, the light detection simultaneously inputs a high potential to all N column readout lines 240 or data lines DL, making the cathode potential of LED D1 higher than or equal to its anode potential. At this time, the reverse current or photocurrent is captured by the row photosensitive data reader 210 corresponding to each row, thus determining the row positioning of the illumination. During row scanning, no bias voltage is applied to LED D1; that is, under zero bias voltage, the photocurrent still flows from region N (D13) to region P (D11). At this time, the reverse current or photocurrent generated by external light is captured by the column photosensitive data reader 220 corresponding to each column, thus determining the column positioning of the illumination. Then, based on the row and column positioning, the illumination positioning can be accurately determined. Furthermore, the intensity of the illumination can be obtained based on the magnitude of the read photocurrent.

[0060] like Figure 10 As shown, during the light detection process, since each row of LEDs D1 has a corresponding row photosensitive data reader 210 and each column of LEDs D1 has a corresponding column photosensitive data reader 220, the LEDs D1 in M ​​rows and the LEDs D1 in N columns can be scanned simultaneously. Compared to Figure 8 The timing sequence shown is as follows: Figure 10 The light detection enable signal S2 shown requires only two pulses in a blank phase F12 to complete light detection. One pulse can simultaneously detect LEDs D1 in row M, and the other pulse can simultaneously detect LEDs D1 in column N. Then, according to the detailed light detection process described above, the light intensity and location can be determined. Therefore, compared to... Figure 8 In a blanking phase F12, N light detections are required. Figure 10 The timing shown significantly shortens the light detection time and is also beneficial for application in higher resolution display panels.

[0061] In one embodiment, such as Figure 11As shown, the display panel includes multiple first scan lines 430, which are sequentially transmitted by scan signals G1, G2...G... k G k+1... G m During the display phase, the pixel driving circuit 100 in each row is scanned line by line through the corresponding first scan line 430. In each pulse (1, 2...mk), the first photocurrent of the light-emitting diode D1 in each row is acquired line by line through the line photosensitive data reader 210. Then, during the blanking phase, the first photocurrent of the light-emitting diode D1 in the remaining rows is acquired line by line through the line photosensitive data reader 210.

[0062] For example, since this panel can simultaneously perform display and detection functions, for the m-row light-emitting diodes D1 or pixel driving circuit 100, during the line-by-line scanning process, the k-th row (corresponding to the scan signal G) k When LED D1 in the (k+1)th row is lit, it is in display mode, while LED D1 in the first row can simultaneously perform photosensitive reading (corresponding to pulse 1 in Detection); the (k+1)th row (corresponding to scan signal G) k+1 When the LED D1 in the first row is lit, it is in display mode, while the LED D1 in the second row can simultaneously perform photosensitive reading (corresponding to pulse 2 in Detection); and so on, until the m-th row (corresponding to scan signal G). k+1 When LED D1 in the pulse is lit, it is in display mode, while LED D1 in the mkth row can be synchronously scanned (corresponding to pulse mk in Detection). At this point, the display scan ends in this frame; however, only the scanning of LED D1 in some rows has been completed at this time, so the scanning of LED D1 in the remaining rows can be performed in the blanking phase (V-Blanking).

[0063] Understandably, performing display scanning and photosensitive reading simultaneously on different rows can significantly save reading time. It should be noted that within a single frame, the photosensitive reading pertains to the LED array that has already been displayed and scanned.

[0064] Where 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 read during the display scanning process, and the impact on the display scanning process can be better avoided.

[0065] In one of the embodiments, the display device comprises the display panel in at least one of the embodiments, and at least part of the photosensitive circuit 200 is located in the non-display area of the display panel.

[0066] It can be understood that, since the display device provided by the embodiments comprises the display panel in at least one of the embodiments, the light-emitting diode D1 can be multiplexed, so that normal picture display can be realized in the case that the light-emitting diode D1 bears a positive bias voltage, and light detection, i.e., determination of the intensity and position of light, can be realized according to the photo-generated current flowing through the light-emitting diode D1 in the case that the light-emitting diode D1 bears a reverse bias voltage or zero bias voltage, which saves the need for an additional light sensor, and further reduces the cost and size of the display product.

[0067] In addition, at least part of the photosensitive circuit 200, for example, at least one of each column of photosensitive data readers 220 and each row of photosensitive data readers 210 can be constructed in the non-display area of the display panel, which reduces the occupied space of the display area of the display panel, and is beneficial to maximizing the area of the display area.

[0068] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0069] The display panel and the display device provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples; the above description of the embodiments is only used to help understand the technical solutions and the core ideas of the present application; those skilled in the art should understand that: the technical solutions recorded in the above embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized by, The display panel comprises a light-sensing display circuit, the light-sensing display circuit comprises: a light-emitting diode, a cathode of the light-emitting diode is electrically connected with a first power line; a pixel driving circuit, the pixel driving circuit is electrically connected with a data line, a first scanning line, a second power line and an anode of the light-emitting diode; a row readout line, one end of the row readout line is electrically connected with the anode of the light-emitting diode; and a row light-sensing data readout, the row light-sensing data readout is electrically connected with the other end of the row readout line to obtain a first photo-generated current flowing through the light-emitting diode; a column readout line, one end of the column readout line is electrically connected with the cathode of the light-emitting diode; a column light-sensing data readout, the column light-sensing data readout is electrically connected with the other end of the column readout line to obtain a second photo-generated current flowing through the light-emitting diode; wherein the first photo-generated current is used to determine a row positioning of the light, the second photo-generated current is used to determine a column positioning of the light, and the positioning of the light is determined according to the row positioning and the column positioning.

2. The display panel of claim 1, wherein, A plurality of the light-emitting diodes and a plurality of the pixel driving circuits are arranged in an array in the display panel; a plurality of the first power lines are arranged in the display panel along a first direction in sequence, one of the first power lines is electrically connected with the cathode of one column of the light-emitting diodes; a plurality of the row readout lines are arranged in the display panel along a second direction in sequence, one of the row readout lines is electrically connected with the row light-sensing data readout, the anode of one row of the light-emitting diodes.

3. The display panel of claim 1, wherein, A plurality of the light-emitting diodes and a plurality of the pixel driving circuits are arranged in an array in the display panel; a plurality of the column readout lines are arranged in the display panel along a first direction in sequence, one of the column readout lines is electrically connected with the column light-sensing data readout, the cathode of one column of the light-emitting diodes; a plurality of the row readout lines are arranged in the display panel along a second direction in sequence, one of the row readout lines is electrically connected with the row light-sensing data readout, the anode of one row of the light-emitting diodes.

4. The display panel of claim 1, wherein, The light-sensing display circuit further comprises: a first transistor, a first electrode of the first transistor is electrically connected with the cathode of the light-emitting diode, a gate of the first transistor is electrically connected with a second scanning line, and a second electrode of the first transistor is electrically connected with the data line; a column light-sensing data readout, the column light-sensing data readout is electrically connected with the data line to obtain the second photo-generated current flowing through the light-emitting diode.

5. The display panel of claim 4, wherein, A plurality of the light-emitting diodes and a plurality of the pixel driving circuits are arranged in an array in the display panel; a plurality of the data lines are arranged in the display panel along a first direction in sequence, one of the data lines is electrically connected with the column light-sensing data readout, the second electrode of one column of the first transistors; a plurality of the row readout lines are arranged in the display panel along a second direction in sequence, one of the row readout lines is electrically connected with the row light-sensing data readout, the anode of one row of the light-emitting diodes.

6. The display panel of any of claims 1-5, wherein, A frame of the light-sensing display circuit includes a display stage and a blank stage; in the display stage, the anode potential of the light-emitting diode is greater than the cathode potential of the light-emitting diode; in the blank stage, the anode potential of the light-emitting diode is less than or equal to the cathode potential of the light-emitting diode.

7. The display panel according to any one of claims 1-5, wherein, A frame of the light-sensing display circuit includes a display stage and a blank stage; in the display stage, the anode potential of the light-emitting diode is greater than the cathode potential of the light-emitting diode; in the blank stage, the anode potential of the light-emitting diode is less than or equal to the cathode potential of the light-emitting diode.

8. The display panel of claim 1, wherein, A frame of the light-sensing display circuit includes a display stage and a blank stage; In the display stage, the pixel driving circuit in the mth row is scanned row by row through the corresponding first scanning line, and the first photo-generated current of the light-emitting diode in the m-kth row is acquired row by row through the row light-sensing data reader, where m and k are integers greater than or equal to 1, and k is less than m; In the blank stage, the first photo-generated current of the light-emitting diode in the remaining rows is acquired row by row through the row light-sensing data reader.

9. A display device, characterized by comprising: The display device includes the display panel of any one of claims 1-8, and at least part of the light-sensing circuit is located in a non-display area of the display panel.

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