Display panel, driving method thereof, and display device

Abstract

A display panel, a driving method thereof and a display device. In the display panel, a photosensitive sensor (50) is located in a peripheral region (40), the photosensitive sensor (50) comprises at least one set of photosensitive transistor structures (51) and at least one set of reference transistor structures (52); the at least one set of photosensitive transistor structures (51) are used for sensing ambient light and outputting photosensitive current (I1); the at least one set of reference transistor structures (52) are not affected by ambient light and are used for outputting reference current (I2); a processing circuit (60) is coupled with an output end (out1) of the at least one set of photosensitive transistor structures (51) and also coupled with an output end (out2) of the at least one set of reference transistor structures (52), and is used for determining ambient illuminance information (X1) according to the photosensitive current (I1) and the reference current (I2); a first control circuit (71) is located in the peripheral region (40), the first control circuit (71) is coupled with the processing circuit (60) and is used for adjusting screen display brightness of the display panel according to the ambient illuminance information (X1).

Description

Display panel, driving method thereof and display device TECHNICAL FIELD

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

[0002] With the continuous development of display technology, the application field of display products is becoming more and more extensive, and people's requirements for the display quality of display products are becoming higher and higher. At present, in order to further improve the display quality of display products and improve user experience, various types of sensors such as light sensors, fingerprint sensors and distance sensors are installed on the whole machine of display products, and the information sensed by these sensors is used to improve the display quality of display products and control the display products to give more accurate feedback.

[0003] SUMMARY

[0004] The present disclosure aims to provide a display panel, a driving method thereof and a display device.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides the following technical solutions:

[0006] The first aspect of the present disclosure provides a display panel, comprising a display area and a peripheral area located at the periphery of the display area, the display panel further comprising:

[0007] a light sensor, the light sensor being located in the peripheral area, the light sensor comprising at least one group of light sensing transistor structures and at least one group of reference transistor structures; the at least one group of light sensing transistor structures are used for sensing ambient light and outputting a light sensing current; the at least one group of reference transistor structures are not affected by ambient light and are used for outputting a reference current;

[0008] a processing circuit, the processing circuit being located in the peripheral area, the processing circuit being coupled with the output end of the at least one group of light sensing transistor structures and also being coupled with the output end of the at least one group of reference transistor structures, and being used for determining ambient illuminance information according to the light sensing current and the reference current;

[0009] a first control circuit, the first control circuit being located in the peripheral area, the first control circuit being coupled with the processing circuit, and being used for adjusting the screen display brightness of the display panel according to the ambient illuminance information.

[0010] Optionally, the processing circuit comprises at least one first sub-circuit, at least one second sub-circuit, a first analog-to-digital conversion sub-circuit, a first digital operation sub-circuit and a first algorithm module.

[0011] The first sampling sub-circuit is coupled with the output end of a corresponding set of photosensitive transistor structures, and is configured to output a photosensitive voltage signal according to a photosensitive current output by the set of photosensitive transistor structures.

[0012] The second sampling sub-circuit is coupled with the output end of a corresponding set of control transistor structures, and is configured to output a control voltage signal according to a control current output by the set of control transistor structures.

[0013] The first analog-digital conversion sub-circuit is coupled with the first sampling sub-circuit and the second sampling sub-circuit, and is configured to convert the photosensitive voltage signal into a digital photosensitive signal and convert the control voltage signal into a digital control signal.

[0014] The first digital operation sub-circuit is coupled with the first analog-digital conversion sub-circuit, and is configured to perform difference calculation on the digital photosensitive signal and the digital control signal to obtain a digital difference signal.

[0015] The first algorithm module is coupled with the first digital operation sub-circuit, and is configured to determine the ambient illuminance information according to the digital difference signal.

[0016] Optionally, the first sampling sub-circuit and the second sampling sub-circuit specifically include:

[0017] a sampling resistor, a first end of the sampling resistor being coupled with a ground signal input end; a second end of the sampling resistor being coupled with the output end of a corresponding set of photosensitive transistor structures, or the second end of the sampling resistor being coupled with the output end of a corresponding set of control transistor structures; and the second end of the sampling resistor being coupled with the output end of the sampling sub-circuit, the output end being configured to output the photosensitive voltage signal or the control voltage signal.

[0018] Optionally, the first sampling sub-circuit and the second sampling sub-circuit further include a voltage follower, and further include at least one of a first resistor, a first capacitor and a second capacitor.

[0019] an input end of the voltage follower being coupled with the second end of the sampling resistor, and an output end of the voltage follower being coupled with the output end configured to output the photosensitive voltage signal or the control voltage signal.

[0020] a first end of the first capacitor being coupled with a positive power supply end of the voltage follower, and a second end of the first capacitor being coupled with the ground signal input end.

[0021] a first end of the second capacitor being coupled with the output end configured to output the photosensitive voltage signal or the control voltage signal, and a second end of the second capacitor being coupled with the ground signal input end.

[0022] In the case that the sampling sub-circuit comprises a first resistor, an output terminal of the voltage follower is coupled with an output terminal for outputting a photosensitive voltage signal or a reference voltage signal through the first resistor.

[0023] Optionally, the display panel comprises a conductive layer, and the sampling resistor is arranged in the same layer and of the same material as the conductive layer.

[0024] Optionally, the conductive layer comprises a gate metal layer, a source-drain metal layer and a transparent electrode layer arranged in sequence, and the sampling resistor is arranged in the same layer and of the same material as the gate metal layer, or the sampling resistor is arranged in the same layer and of the same material as the source-drain metal layer, or the sampling resistor is arranged in the same layer and of the same material as the transparent electrode layer.

[0025] Optionally, the first sampling sub-circuit and the second sampling sub-circuit specifically comprise a transimpedance amplification module and an inverting amplification module.

[0026] An output terminal of the transimpedance amplification module is coupled with an inverting input terminal of the inverting amplification module, an inverting input terminal of the transimpedance amplification module is coupled with an output terminal of a corresponding group of photosensitive transistor structures for converting a photosensitive current into a photosensitive transition voltage, or the inverting input terminal of the transimpedance amplification module is coupled with an output terminal of a corresponding group of reference transistor structures for converting a reference current into a reference transition voltage.

[0027] An output terminal of the inverting amplification module is coupled with an output terminal of the sampling sub-circuit for obtaining a photosensitive voltage signal according to the photosensitive transition voltage, or for obtaining a reference voltage signal according to the reference transition voltage.

[0028] Optionally, the transimpedance amplification module comprises a transimpedance amplifier and a second resistor, a non-inverting input terminal of the transimpedance amplifier is coupled with a ground signal input terminal, and an inverting input terminal of the transimpedance amplifier is coupled with an output terminal of a corresponding group of photosensitive transistor structures or an output terminal of a corresponding group of reference transistor structures; a first terminal of the second resistor is coupled with the inverting input terminal of the transimpedance amplifier, and a second terminal of the second resistor is coupled with an output terminal of the transimpedance amplifier.

[0029] The inverting amplification module comprises an inverting amplifier, a third resistor and a fourth resistor; a first terminal of the third resistor is coupled with an output terminal of the transimpedance amplifier, and a second terminal of the third resistor is coupled with an inverting input terminal of the inverting amplifier; a first terminal of the fourth resistor is coupled with the inverting input terminal of the inverting amplifier, and a second terminal of the fourth resistor is coupled with an output terminal of the inverting amplifier; a non-inverting input terminal of the inverting amplifier is coupled with a ground signal input terminal, and an output terminal of the inverting amplifier is coupled with an output terminal of the sampling sub-circuit.

[0030] Optionally, the transimpedance amplification module further comprises a third capacitor, a first end of the third capacitor being coupled with a first end of the second resistor, and a second end of the third capacitor being coupled with a second end of the second resistor; and / or,

[0031] The inverting amplification module further comprises a fourth capacitor, a first end of the fourth capacitor being coupled with a first end of the fourth resistor, and a second end of the fourth capacitor being coupled with a second end of the fourth resistor.

[0032] Optionally, the photosensitive sensor comprises three groups of photosensitive transistor structures and one group of reference transistor structures.

[0033] The processing circuit comprises three first sub-circuits and one second sub-circuit.

[0034] An output end of the first group of photosensitive transistor structures is coupled with a first first sub-circuit corresponding thereto, and the first first sub-circuit is configured to output a first photosensitive voltage signal according to a first photosensitive current output by the output end of the first group of photosensitive transistor structures.

[0035] An output end of the second group of photosensitive transistor structures is coupled with a second first sub-circuit corresponding thereto, and the second first sub-circuit is configured to output a second photosensitive voltage signal according to a second photosensitive current output by the output end of the second group of photosensitive transistor structures.

[0036] An output end of the third group of photosensitive transistor structures is coupled with a third first sub-circuit corresponding thereto, and the third first sub-circuit is configured to output a third photosensitive voltage signal according to a third photosensitive current output by the output end of the third group of photosensitive transistor structures.

[0037] The display panel further comprises a red color film shielding pattern, a green color film shielding pattern and a blue color film shielding pattern, the red color film shielding pattern covering the first group of photosensitive transistor structures, the green color film shielding pattern covering the second group of photosensitive transistor structures, and the blue color film shielding pattern covering the third group of photosensitive transistor structures.

[0038] The first analog-to-digital conversion sub-circuit is coupled with the three first sub-circuits and the one second sub-circuit respectively, and is configured to convert the first photosensitive voltage signal into a first digital photosensitive signal, convert the second photosensitive voltage signal into a second digital photosensitive signal, and convert the third photosensitive voltage signal into a third digital photosensitive signal.

[0039] The first digital operator circuit is configured to perform difference calculation on the first digital photosensitive signal and the digital reference signal to obtain a first digital difference signal, perform difference calculation on the second digital photosensitive signal and the digital reference signal to obtain a second digital difference signal, and perform difference calculation on the third digital photosensitive signal and the digital reference signal to obtain a third digital difference signal.

[0040] The first algorithm module is configured to determine the ambient illuminance information according to the first digital difference signal, the second digital difference signal, or the third digital difference signal.

[0041] The processing circuit further includes a second algorithm module, which is coupled with the first digital operator circuit. The second algorithm module is configured to determine color temperature detection information according to the first digital difference signal, the second digital difference signal, and the third digital difference signal.

[0042] The display panel further includes a second control circuit, which is coupled with the second algorithm module. The second control circuit is configured to adjust a screen display color temperature of the display panel according to the color temperature detection information.

[0043] Optionally, the display panel includes a driving chip, and the first analog-to-digital conversion sub-circuit, the first digital operator circuit, the first algorithm module, and the second algorithm module are integrated in the driving chip. In each first sampling sub-circuit and each second sampling sub-circuit, except for a sampling resistor, other parts are integrated in the driving chip.

[0044] Optionally, the photosensitive transistor structure and the reference transistor structure correspond to each other. An output end of the corresponding photosensitive transistor structure is coupled with an output end of the reference transistor structure to form a common output end. The common output end is configured to output a difference current signal obtained by performing difference calculation on the photosensitive current and the reference current.

[0045] The processing circuit includes a conversion sub-circuit, a second analog-to-digital conversion sub-circuit, and a first algorithm module.

[0046] The conversion sub-circuit is connected between the common output end and the second analog-to-digital conversion sub-circuit, and is configured to convert the difference current signal into a difference voltage signal.

[0047] The second analog-to-digital conversion sub-circuit is configured to convert the difference voltage signal into a digital difference signal.

[0048] The first algorithm module is coupled with the second analog-to-digital conversion sub-circuit, and is configured to determine the ambient illuminance information according to the digital difference signal.

[0049] Optionally, the photosensitive sensor comprises three groups of photosensitive transistor structures and three groups of reference transistor structures;

[0050] The output end of the first group of photosensitive transistor structures is coupled with the output end of the corresponding first group of reference transistor structures to form a first common output end, the first common output end being used for outputting a first difference current signal, the first difference current signal being obtained by subtracting a first reference current outputted by the output end of the first group of reference transistor structures from a first photosensitive current outputted by the output end of the first group of photosensitive transistor structures;

[0051] The output end of the second group of photosensitive transistor structures is coupled with the output end of the corresponding second group of reference transistor structures to form a second common output end, the second common output end being used for outputting a second difference current signal, the second difference current signal being obtained by subtracting a second reference current outputted by the output end of the second group of reference transistor structures from a second photosensitive current outputted by the output end of the second group of photosensitive transistor structures;

[0052] The output end of the third group of photosensitive transistor structures is coupled with the output end of the corresponding third group of reference transistor structures to form a third common output end, the third common output end being used for outputting a third difference current signal, the third difference current signal being obtained by subtracting a third reference current outputted by the output end of the third group of reference transistor structures from a third photosensitive current outputted by the output end of the third group of photosensitive transistor structures;

[0053] The display panel further comprises a red color film shielding pattern, a green color film shielding pattern and a blue color film shielding pattern, the red color film shielding pattern covering the first group of photosensitive transistor structures, the green color film shielding pattern covering the second group of photosensitive transistor structures, and the blue color film shielding pattern covering the third group of photosensitive transistor structures;

[0054] The processing circuit comprises a first conversion sub-circuit, a second conversion sub-circuit, a third conversion sub-circuit and a second algorithm module;

[0055] The first conversion sub-circuit is connected between the first common output end and the second analog-digital conversion sub-circuit, and is used for converting the first difference current signal into a first difference voltage signal;

[0056] The second conversion sub-circuit is connected between the second common output end and the second analog-digital conversion sub-circuit, and is used for converting the second difference current signal into a second difference voltage signal;

[0057] The third conversion sub-circuit is connected between the third common output end and the second analog-digital conversion sub-circuit, and is used for converting the third difference current signal into a third difference voltage signal;

[0058] The second analog-to-digital conversion sub-circuit is configured to convert the first difference voltage signal into a first digital difference signal, convert the second difference voltage signal into a second digital difference signal, and convert the third difference voltage signal into a third digital difference signal.

[0059] The first algorithm module is configured to determine the ambient illuminance information according to the first digital difference signal, the second digital difference signal, or the third digital difference signal.

[0060] The second algorithm module is configured to determine color temperature detection information according to the first digital difference signal, the second digital difference signal, and the third digital difference signal.

[0061] The display panel further comprises a second control circuit coupled to the second algorithm module, and the second control circuit is configured to adjust a screen display color temperature of the display panel according to the color temperature detection information.

[0062] Optionally, the conversion sub-circuit comprises a conversion resistor, a first end of the conversion resistor is coupled to the common output end, and a second end of the conversion resistor is coupled to the second analog-to-digital conversion sub-circuit.

[0063] The display panel comprises a conductive layer, and the conversion resistor is disposed in the same layer and of the same material as the conductive layer.

[0064] Optionally, the conductive layer comprises a gate metal layer, a source / drain metal layer, and a transparent electrode layer which are sequentially stacked, the conversion resistor is disposed in the same layer and of the same material as the gate metal layer, or the conversion resistor is disposed in the same layer and of the same material as the source / drain metal layer, or the conversion resistor is disposed in the same layer and of the same material as the transparent electrode layer.

[0065] Optionally, the display panel comprises a driving chip, and the second analog-to-digital conversion sub-circuit, the first algorithm module, and the second algorithm module are integrated in the driving chip.

[0066] Optionally, the display panel further comprises a black matrix layer, a normal projection of a light-sensing surface of the light-sensing transistor structure on a substrate of the display panel does not overlap with a normal projection of the black matrix layer on the substrate, and a normal projection of a light-sensing surface of the comparison transistor structure on the substrate overlaps with the normal projection of the black matrix layer on the substrate.

[0067] Optionally, the peripheral region comprises oppositely arranged upper and lower frame regions, the display region is located between the upper and lower frame regions, the light-sensing sensor is located in the upper frame region, and a driving chip in the display panel is located in the lower frame region.

[0068] Based on the specific structure of the display panel, the second aspect of the present disclosure provides a display device comprising the display panel.

[0069] Based on the specific structure of the display panel, the third aspect of the present disclosure provides a driving method of a display panel, applied to the display panel, the driving method comprising:

[0070] At least one set of light-sensing transistor structures in the light-sensing sensor senses ambient light and outputs a light-sensing current; at least one set of reference transistor structures in the light-sensing sensor is not affected by ambient light and outputs a reference current;

[0071] The processing circuit determines ambient illuminance information according to the light-sensing current and the reference current;

[0072] The first control circuit adjusts the screen display brightness of the display panel according to the ambient illuminance information.

[0073] Optionally, the processing circuit comprises at least one first sampling sub-circuit, at least one second sampling sub-circuit, a first analog-digital conversion sub-circuit, a first digital operation sub-circuit, and a first algorithm module; the first sampling sub-circuit is coupled to the output end of the corresponding set of light-sensing transistor structures; the second sampling sub-circuit is coupled to the output end of the corresponding set of reference transistor structures; the first analog-digital conversion sub-circuit is coupled to the first sampling sub-circuit and the second sampling sub-circuit respectively; the first digital operation sub-circuit is coupled to the first analog-digital conversion sub-circuit; and the first algorithm module is coupled to the first digital operation sub-circuit.

[0074] The driving method specifically comprises:

[0075] The first sampling sub-circuit outputs a light-sensing voltage signal according to the light-sensing current output by the set of light-sensing transistor structures;

[0076] The second sampling sub-circuit outputs a reference voltage signal according to the reference current output by the set of reference transistor structures;

[0077] The first analog-digital conversion sub-circuit converts the light-sensing voltage signal into a digital light-sensing signal and converts the reference voltage signal into a digital reference signal;

[0078] The first digital operation sub-circuit performs difference calculation on the digital light-sensing signal and the digital reference signal to obtain a digital difference signal;

[0079] The first algorithm module determines the ambient illuminance information according to the digital difference signal.

[0080] Optionally, the photosensitive sensor comprises three groups of photosensitive transistor structures and one group of reference transistor structures; the processing circuit comprises three first sub-circuits and one second sub-circuit; the output end of the first group of photosensitive transistor structures is coupled with a corresponding first first sub-circuit, the output end of the second group of photosensitive transistor structures is coupled with a corresponding second first sub-circuit, the output end of the third group of photosensitive transistor structures is coupled with a corresponding third first sub-circuit, and the first analog-digital conversion sub-circuit is coupled with the three first sub-circuits and the one second sub-circuit respectively; the processing circuit further comprises a second algorithm module, which is coupled with the first digital operation sub-circuit; the display panel further comprises a second control circuit, which is coupled with the second algorithm module; the display panel further comprises a red color film shielding pattern, a green color film shielding pattern and a blue color film shielding pattern, the red color film shielding pattern covers the first group of photosensitive transistor structures, the green color film shielding pattern covers the second group of photosensitive transistor structures, and the blue color film shielding pattern covers the third group of photosensitive transistor structures;

[0081] The driving method specifically comprises:

[0082] The first first sub-circuit outputs a first photosensitive voltage signal according to a first photosensitive current output from the output end of the first group of photosensitive transistor structures;

[0083] The second first sub-circuit outputs a second photosensitive voltage signal according to a second photosensitive current output from the output end of the second group of photosensitive transistor structures;

[0084] The third first sub-circuit outputs a third photosensitive voltage signal according to a third photosensitive current output from the output end of the third group of photosensitive transistor structures;

[0085] The first analog-digital conversion sub-circuit converts the first photosensitive voltage signal into a first digital photosensitive signal, converts the second photosensitive voltage signal into a second digital photosensitive signal, and converts the third photosensitive voltage signal into a third digital photosensitive signal;

[0086] The first digital operation sub-circuit performs difference calculation on the first digital photosensitive signal and the digital reference signal to obtain a first digital difference signal, performs difference calculation on the second digital photosensitive signal and the digital reference signal to obtain a second digital difference signal, and performs difference calculation on the third digital photosensitive signal and the digital reference signal to obtain a third digital difference signal;

[0087] The first algorithm module determines the ambient illuminance information according to the first digital difference signal, the second digital difference signal or the third digital difference signal;

[0088] The second algorithm module determines color temperature detection information according to the first digital difference value signal, the second digital difference value signal and the third digital difference value signal;

[0089] The second control circuit adjusts a screen display color temperature of the display panel according to the color temperature detection information.

[0090] Optionally, the light sensing transistor structure and the contrast transistor structure correspond to each other one by one, an output end of the corresponding light sensing transistor structure and an output end of the corresponding contrast transistor structure are coupled to form a common output end; the processing circuit includes a conversion sub-circuit, a second analog-digital conversion sub-circuit and a first algorithm module; the conversion sub-circuit is connected between the common output end and the second analog-digital conversion sub-circuit, and the first algorithm module is coupled to the second analog-digital conversion sub-circuit;

[0091] The common output end outputs a difference value current signal, and the difference value current signal is obtained by subtracting the light sensing current from the contrast current;

[0092] The conversion sub-circuit converts the difference value current signal into a difference value voltage signal;

[0093] The second analog-digital conversion sub-circuit converts the difference value voltage signal into a digital difference value signal;

[0094] The first algorithm module determines the ambient illuminance information according to the digital difference value signal.

[0095] Optionally, the photosensitive sensor comprises three groups of photosensitive transistor structures and three groups of control transistor structures; the output end of the first group of photosensitive transistor structures is coupled with the output end of the corresponding first group of control transistor structures to form a first common output end, the output end of the second group of photosensitive transistor structures is coupled with the output end of the corresponding second group of control transistor structures to form a second common output end, and the output end of the third group of photosensitive transistor structures is coupled with the output end of the corresponding third group of control transistor structures to form a third common output end; the display panel further comprises a red color film shielding pattern, a green color film shielding pattern and a blue color film shielding pattern, the red color film shielding pattern covers the first group of photosensitive transistor structures, the green color film shielding pattern covers the second group of photosensitive transistor structures, and the blue color film shielding pattern covers the third group of photosensitive transistor structures; the processing circuit comprises a first conversion sub-circuit, a second conversion sub-circuit, a third conversion sub-circuit and a second algorithm module; the first conversion sub-circuit is connected between the first common output end and the second analog conversion sub-circuit, the second conversion sub-circuit is connected between the second common output end and the second analog conversion sub-circuit, and the third conversion sub-circuit is connected between the third common output end and the second analog conversion sub-circuit; the display panel further comprises a second control circuit, and the second control circuit is coupled with the second algorithm module.

[0096] The first common output end outputs a first difference current signal, which is obtained by subtracting a first control current output by the output end of the first group of control transistor structures from a first photosensitive current output by the output end of the first group of photosensitive transistor structures;

[0097] The second common output end outputs a second difference current signal, which is obtained by subtracting a second control current output by the output end of the second group of control transistor structures from a second photosensitive current output by the output end of the second group of photosensitive transistor structures;

[0098] The third common output end outputs a third difference current signal, which is obtained by subtracting a third control current output by the output end of the third group of control transistor structures from a third photosensitive current output by the output end of the third group of photosensitive transistor structures;

[0099] The first conversion sub-circuit converts the first difference current signal into a first difference voltage signal;

[0100] The second conversion sub-circuit converts the second difference current signal into a second difference voltage signal;

[0101] The third conversion sub-circuit converts the third difference current signal into a third difference voltage signal;

[0102] The second analog-to-digital conversion sub-circuit converts the first difference voltage signal into a first digital difference signal, converts the second difference voltage signal into a second digital difference signal, and converts the third difference voltage signal into a third digital difference signal.

[0103] The first algorithm module determines the ambient illuminance information according to the first digital difference signal, the second digital difference signal, or the third digital difference signal.

[0104] The second algorithm module determines color temperature detection information according to the first digital difference signal, the second digital difference signal, and the third digital difference signal.

[0105] The second control circuit adjusts the screen display color temperature of the display panel according to the color temperature detection information. BRIEF DESCRIPTION OF DRAWINGS

[0106] The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of the present disclosure, illustrate the exemplary embodiments of the present disclosure and serve to explain the present disclosure, and do not limit the present disclosure in any manner. In the drawings:

[0107] FIG. 1 is a schematic diagram of a module for ambient illuminance information detection and control in a display panel according to an embodiment of the present disclosure;

[0108] FIG. 2 is a schematic diagram of a first specific module for ambient illuminance information detection and control in a display panel according to an embodiment of the present disclosure;

[0109] FIG. 3 is a schematic diagram of a first layout of a display panel according to an embodiment of the present disclosure;

[0110] FIG. 4 is a schematic diagram of a first structure of a photosensitive sensor according to an embodiment of the present disclosure;

[0111] FIG. 5 is a schematic diagram of a cross section of a transistor structure according to an embodiment of the present disclosure;

[0112] FIG. 6 is a schematic diagram of a Vg-Id characteristic curve of a transistor structure according to an embodiment of the present disclosure;

[0113] FIG. 7 is a schematic diagram of a photosensitive characteristic curve of a transistor structure according to an embodiment of the present disclosure;

[0114] FIG. 8 is a schematic diagram of a first structure of a sub-circuit according to an embodiment of the present disclosure;

[0115] FIG. 9 is a schematic diagram of a second structure of a sub-circuit according to an embodiment of the present disclosure;

[0116] FIG. 10 is a timing diagram corresponding to FIG. 9 according to an embodiment of the present disclosure;

[0117] FIG. 11 is a schematic diagram of a second specific module for ambient illuminance information detection and control in a display panel according to an embodiment of the present disclosure;

[0118] FIG. 12 is a schematic diagram of a second layout of a display panel according to an embodiment of the present disclosure;

[0119] FIG. 13 is a schematic diagram of a second structure of a photosensitive sensor according to an embodiment of the present disclosure;

[0120] FIG. 14 is a schematic diagram of a third structure of a photosensitive sensor according to an embodiment of the present disclosure;

[0121] FIG. 15 is a schematic diagram of a third specific module for ambient illuminance information detection and control in a display panel according to an embodiment of the present disclosure;

[0122] FIG. 16 is a schematic diagram of a fourth structure of a photosensitive sensor according to an embodiment of the present disclosure;

[0123] FIG. 17 is a schematic diagram of a fourth specific module for ambient illuminance information detection and control in a display panel according to an embodiment of the present disclosure;

[0124] FIG. 18 is a schematic diagram of a fifth structure of a photosensitive sensor according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0125] To further illustrate the display panel and the driving method thereof and the display device provided by the embodiments of the present disclosure, the following will make a detailed description in conjunction with the accompanying drawings.

[0126] It is found through research that, in the related art, installing multiple types of sensors on the whole machine of a display product will cause the volume of the whole machine of the display product to become larger and the cost to become higher, which is not conducive to the lightweight development trend of the display product. Therefore, how to reduce the volume of the whole machine of the display product and reduce the manufacturing cost of the display product while ensuring that the display product has the function of integrating the sensor has become a technical problem to be solved.

[0127] Referring to FIGS. 1, 3 and 4, the display panel provided by the embodiments of the present disclosure includes a display area AA and a peripheral area 40 located at the periphery of the display area AA, and further includes:

[0128] A photosensitive sensor 50 is located at the peripheral area 40, and the photosensitive sensor 50 includes at least one group of photosensitive transistor structures 51 and at least one group of reference transistor structures 52. The at least one group of photosensitive transistor structures 51 are used to sense ambient light and output a photosensitive current I1. The at least one group of reference transistor structures 52 are not affected by ambient light and are used to output a reference current I2.

[0129] processing circuit 60 is located in the peripheral region 40, and is coupled with the output end out1 of the at least one set of light-sensing transistor structures 51 and the output end out2 of the at least one set of contrast transistor structures 52, and is configured to determine ambient illuminance information X1 according to the light-sensing current I1 and the contrast current I2.

[0130] The first control circuit 71 is located in the peripheral region 40, and is coupled with the processing circuit 60, and is configured to adjust the screen display brightness of the display panel according to the ambient illuminance information X1.

[0131] As shown in FIG. 3, the display panel includes a display region AA and a peripheral region 40, for example, the peripheral region 40 surrounds the display region AA, but is not limited thereto. The peripheral region 40 includes an AV area surrounding the display region AA, which can be used to layout the driving circuit located in the peripheral region 40. The peripheral region 40 includes oppositely arranged upper and lower frame areas, and the display region AA is located between the upper and lower frame areas; the light-sensing sensor 50 is located in the upper frame area (i.e., the DPO side of the display panel), and the driving chip in the display panel is located in the lower frame area (i.e., the DP side of the display panel). Further, the AV area in the upper frame area is not used for layout of the driving circuit, i.e., this area is a blank layout area, and the light-sensing sensor 50 can be laid out in this area. In this way, the light-sensing sensor 50 is laid out in an area that is not originally used, avoiding the increase of the frame width of the display panel for layout of the light-sensing sensor 50, and being conducive to the realization of narrow frame of the display panel.

[0132] As an example, the peripheral region 40 further includes left and right frame areas, and the left and right frame areas are oppositely arranged, and the display region AA is located between the left and right frame areas, and the light-sensing sensor 50 can also be arranged in the left and / or right frame area. As an example, the light-sensing sensor 50 can also be arranged between the two chips on the DPO side of the display panel, or arranged at the R corner and / or C corner on the DPO side.

[0133] As an example, the light-sensing sensor 50 can be integrated into display panels of different sizes, such as MBL (mobile terminal), TPC (touch panel), vehicle, NB (notebook), MNT (monitor) and TV (television) display products, but is not limited thereto.

[0134] Exemplarily, the photosensitive sensor 50 comprises at least one set of photosensitive transistor structures 51 and at least one set of contrast transistor structures 52; each set of photosensitive transistor structures 51 and each set of contrast transistor structures 52 have the same specific structure, and the same specific structure of transistors are adopted, for example: LTPS (low temperature polysilicon) transistors are adopted, but not limited thereto; such LTPS transistors have higher carrier mobility, which is beneficial to improve the sensing accuracy. Each set of photosensitive transistor structures 51 and each set of contrast transistor structures 52 can be configured to comprise three transistors, the gates of the three transistors are coupled together, the first poles of the three transistors are coupled together, and the second poles of the third transistors are coupled together.

[0135] Exemplarily, in each set of photosensitive transistor structures 51, the gates of the three transistors are connected to a first control signal G1, the first poles of the three transistors are connected to a first write signal S1, and the second poles of the three transistors are connected to the output end out1 of the set of photosensitive transistor structures 51.

[0136] Exemplarily, in each set of contrast transistor structures 52, the gates of the three transistors are connected to a second control signal G2, the first poles of the three transistors are connected to a second write signal S2, and the second poles of the three transistors are connected to the output end out1 of the set of photosensitive transistor structures 51.

[0137] Exemplarily, the first control signal G1, the second control signal G2, the first write signal S1 and the second write signal S2 can be provided by a chip in a display panel or by other signal input ends, and the specific implementation is not limited. During actual sensing, the voltage values of the first control signal G1 and the second control signal G2 can be set to 0V, and the voltage ranges of the first write signal S1 and the second write signal S2 are between 3V and 9V, but not limited thereto.

[0138] Exemplarily, one of the first pole and the second pole of the above-mentioned transistor can be a source pole, and the other can be a drain pole.

[0139] As shown in FIG. 5, the light shielding layer LS, the buffer layer BUF, the active layer, the gate insulating layer GI, the gate layer 20, the interlayer insulating layer ILD, the source-drain metal layer 30, the planarization layer PLN, the passivation layer PVX, the liquid crystal layer LC, the black matrix layer BM, and the red color filter shielding pattern CFR are shown in FIG. 5. The solid arrows in the figure show the irradiation of ambient light. The active layer, the gate insulating layer GI, the gate layer 20, the interlayer insulating layer ILD, and the source-drain metal layer 30 are used to form a transistor structure. The active layer includes a channel portion 10, a lightly doped channel portion 11, and a heavily doped portion 12. The lightly doped channel portion 11 is not covered by the gate layer 20, so that the transistor structure has a photosensitive characteristic. The heavily doped portion 12 is used to contact the source and drain of the transistor structure. The light shielding layer LS is used to shield light from the backlight side from irradiating the transistor structure.

[0140] As shown in FIG. 6, the Vg-Id characteristic curve of the transistor structure is shown, where Vg represents the gate voltage and Id represents the drain current. FIG. 6 is the curve corresponding to the contrast transistor structure 52 when Vds (the drain-source voltage of the transistor structure) is 3 V. As shown in FIG. 7, the Ioff current of the photosensitive transistor structure 51 changes linearly with the brightness of ambient light. FIG. 7 is the curve corresponding to the photosensitive transistor structure 51 when Vg = 0 V and Vds = 3 V. The abscissa of FIG. 7 is the ambient light illuminance, with the unit of Lux. As can be seen from FIG. 7, the current of the photosensitive transistor structure 51 increases linearly with the increase of the illuminance of ambient light (0 Lux-1000 Lux), and the current value ranges from 7.37*10 -9 A to 2.81*10 -8 A. The current value corresponds to the ambient light illuminance one-to-one, and it can be seen that the photosensitive transistor structure 51 has a photosensitive function.

[0141] As shown in FIG. 3 and FIG. 4, the display panel further includes a black matrix layer BM; the orthographic projection of the photosensitive surface of the photosensitive transistor structure 51 on the substrate of the display panel does not overlap with the orthographic projection of the black matrix layer BM on the substrate; and the orthographic projection of the photosensitive surface of the contrast transistor structure 52 on the substrate overlaps with the orthographic projection of the black matrix layer BM on the substrate.

[0142] Exemplarily, as shown in FIG. 3 and FIG. 4, the photosensitive sensor 50 includes a group of photosensitive transistor structures 51 and a group of contrast transistor structures 52; the black matrix layer BM above the group of photosensitive transistor structures 51 is excavated, so that the group of photosensitive transistor structures 51 can receive ambient light for brightness detection. The group of contrast transistor structures 52 is covered by the black matrix layer BM, so that the group of contrast transistor structures 52 is always in a dark environment for contrast. When ambient light is irradiated, the group of photosensitive transistor structures 51 is sensitive to light and outputs a photosensitive current I1, and the group of contrast transistor structures 52 is blocked by the black matrix layer BM and is not sensitive to light, and outputs a contrast current I2. The photosensitive current I1 is greater than the contrast current I2, and at least differs by an order of magnitude.

[0143] Exemplarily, at least part of the processing circuit 60 and the first control circuit 71 can be integrated in a driving chip included in the display panel, but are not limited thereto. Exemplarily, for a liquid crystal display panel, the first control circuit 71 can be used to adjust the brightness of the backlight of the liquid crystal display panel, but is not limited thereto. For an organic light-emitting diode display panel, the first control circuit 71 can be used to adjust the luminous brightness of the sub-pixels in the display panel, but is not limited thereto.

[0144] According to the specific structure of the display panel described above, in the display panel provided by the embodiments of the present disclosure, the photosensitive sensor 50, the processing circuit 60 and the first control circuit 71 are integrated in the peripheral area 40 of the display panel; the processing circuit 60 can determine the ambient illuminance information X1 according to the photosensitive current I1 and the contrast current I2 fed back by the photosensitive sensor 50; and the first control circuit 71 is coupled with the processing circuit 60 and is used to adjust the screen display brightness of the display panel according to the ambient illuminance information X1. Therefore, in the display panel provided by the embodiments of the present disclosure, by integrating the photosensitive sensor 50, the processing circuit 60 and the first control circuit 71 in the peripheral area 40 of the display panel, the function of automatically detecting ambient light to adjust the screen display brightness is realized, and the overall space of the display product (for example, 50mm 2 ) is saved.

[0145] Further, the display panel provided by the embodiment of the present disclosure is provided, wherein the photosensitive sensor 50 comprises at least one group of photosensitive transistor structures 51 and at least one group of contrast transistor structures 52, so that the at least one group of photosensitive transistor structures 51 and the at least one group of contrast transistor structures 52 can be formed at the same time as other transistor structures in the display panel in the same patterning process, thereby avoiding the increase of additional process flow for manufacturing the photosensitive sensor 50, and effectively reducing the manufacturing cost of the display panel. In more detail, the display panel comprises a 9Mask process, specifically including: LS Mask, Ploy Mask, NGate Mask, ILD Mask, SD Mask, PLN Mask, 1ITO Mask, PVX Mask and 2ITO Mask. The LS Mask is used to form the light shielding layer LS, the Ploy Mask is used to form the active layer, the NGate Mask is used to form the gate layer 20, the ILD Mask is used to form the interlayer dielectric layer ILD with a via, the SD Mask is used to form the source / drain metal layer 30, the PLN Mask is used to form the planarization layer PLN with a via, the 1ITO Mask is used to form the first electrode layer, the PVX Mask is used to form the passivation layer PVX with a via, and the 2ITO Mask is used to form the second electrode layer. The display panel provided by the embodiment of the present disclosure can be manufactured by using the original process.

[0146] In addition, the display panel provided by the embodiment of the present disclosure is provided, wherein the photosensitive sensor 50, the processing circuit 60 and the first control circuit 71 are all arranged in the peripheral area 40 of the display panel, and the signal lines connecting the photosensitive sensor 50 and the processing circuit 60 can be arranged in the peripheral area 40. Specifically, as shown in FIG. 4, in the case that the photosensitive sensor 50 is arranged in the upper frame area, at least part of the processing circuit 60 and the first control circuit 71 are arranged in the lower frame area, the first control signal line (used for transmitting the first control signal G1) connected between the photosensitive sensor 50 and the driving chip, the first write signal line (used for transmitting the first write signal S1) connected between the photosensitive sensor 50 and the driving chip, and the first transmission signal line connected between the photosensitive sensor 50 and the driving chip can be arranged in the left frame area; the second control signal line (used for transmitting the second control signal G2) connected between the photosensitive sensor 50 and the driving chip, the second write signal line (used for transmitting the second write signal S1) connected between the photosensitive sensor 50 and the driving chip, and the second transmission signal line connected between the photosensitive sensor 50 and the driving chip can be arranged in the right frame area.

[0147] In the above layout mode, the Pitch required by each signal line is 9μm, and the single-side frame is increased by 27μm, which can meet the actual demand.

[0148] In summary, the display panel provided by the embodiments of the present disclosure integrates the photosensitive sensor 50, the processing circuit 60 and the first control circuit 71 in the peripheral area 40 of the display panel, realizes integrated design, improves the additional functions of the display panel, and effectively reduces the overall volume of the display product. Moreover, the display panel provided by the embodiments of the present disclosure realizes automatic detection of ambient light brightness and can adjust the screen display brightness in real time, effectively improves the display quality of the display panel, and improves the market competitiveness of the display product.

[0149] As shown in FIG. 2, in some embodiments, the processing circuit 60 includes at least one first sub-circuit 61, at least one second sub-circuit 62, a first analog-digital conversion sub-circuit 63, a first digital operation sub-circuit 64 and a first algorithm module 81.

[0150] The first sub-circuit 61 is coupled with the output end out1 of a corresponding group of photosensitive transistor structures 51, and is configured to output a photosensitive voltage signal U1 according to the photosensitive current I1 output by the group of photosensitive transistor structures 51.

[0151] The second sub-circuit 62 is coupled with the output end out2 of a corresponding group of reference transistor structures 52, and is configured to output a reference voltage signal U2 according to the reference current I2 output by the group of reference transistor structures 52.

[0152] The first analog-digital conversion sub-circuit 63 is coupled with the first sub-circuit 61 and the second sub-circuit 62, respectively, and is configured to convert the photosensitive voltage signal U1 into a digital photosensitive signal U01 and convert the reference voltage signal U2 into a digital reference signal U02.

[0153] The first digital operation sub-circuit 64 is coupled with the first analog-digital conversion sub-circuit 63, and is configured to perform difference calculation on the digital photosensitive signal U01 and the digital reference signal U02 to obtain a digital difference signal.

[0154] The first algorithm module 81 is coupled with the first digital operation sub-circuit 64, and is configured to determine the ambient illuminance information X1 according to the digital difference signal.

[0155] Exemplarily, as shown in FIG. 2, the photosensitive sensor 50 includes a group of photosensitive transistor structures 51 and a group of reference transistor structures 52, and the processing circuit 60 includes a first sampling sub-circuit 61 and a second sampling sub-circuit 62. When ambient light is irradiated, the group of photosensitive transistor structures 51 outputs a photosensitive current I1, and the group of reference transistor structures 52 outputs a reference current I2. The first sampling sub-circuit 61 outputs a photosensitive voltage signal U1 according to the photosensitive current I1, and the second sampling sub-circuit 62 outputs a reference voltage signal U2 according to the reference current I2. The first analog-digital conversion sub-circuit 63 converts the photosensitive voltage signal U1 into a digital photosensitive signal U01 and converts the reference voltage signal U2 into a digital reference signal U02. The first digital operation sub-circuit 64 calculates the difference between the digital photosensitive signal U01 and the digital reference signal U02 to obtain a digital difference signal. The first algorithm module 81 determines the ambient illuminance information X1 according to the digital difference signal.

[0156] Exemplarily, the first analog-digital conversion circuit detects the photosensitive voltage signal U1 output by the first sampling sub-circuit 61 and the reference voltage signal U2 output by the second sampling sub-circuit 62. The first analog-digital conversion circuit can accept an algorithm processing of 16 bits, and can satisfy the detection of a voltage signal in a voltage range of 0-5V, corresponding to an ambient light detection range of 0-100000 lux.

[0157] The display panel provided by the above embodiment can realize the function of adjusting the screen display brightness by adjusting the backlight current of the display panel in real time according to the ambient illuminance information X1 when the ambient illuminance information X1 reflects that the ambient light is too low or too high.

[0158] As shown in FIG. 8, in some embodiments, the first sampling sub-circuit 61 and the second sampling sub-circuit 62 specifically include a sampling resistor R0, a first end of the sampling resistor R0 is coupled with a ground signal input end, a second end of the sampling resistor R0 is coupled with an output end out1 of a corresponding group of photosensitive transistor structures 51, or the second end of the sampling resistor R0 is coupled with an output end out2 of a corresponding group of reference transistor structures 52, and the second end of the sampling resistor R0 is coupled with an output end out3 of the sampling sub-circuit, which is used to output the photosensitive voltage signal U1 or the reference voltage signal U2.

[0159] Exemplarily, in the first sampling sub-circuit 61, the second end of the sampling resistor R0 is coupled with the output end out1 of the corresponding group of the photosensitive transistor structure 51. In the second sampling sub-circuit 62, the second end of the sampling resistor R0 is coupled with the output end out2 of the corresponding group of the contrast transistor structure 52.

[0160] Exemplarily, the display panel comprises a conductive layer, and the sampling resistor R0 is arranged in the same layer and of the same material as the conductive layer. In this way, the sampling resistor R0 and the conductive layer can be formed simultaneously in the same patterning process, without the need to increase a process flow specially for manufacturing the sampling resistor R0. Moreover, the sampling resistor R0 can be directly manufactured in the peripheral area 40, i.e., independently of the driving chip, which is beneficial to simplify the internal structure of the driving chip, reduce the volume of the driving chip, reduce the height of the driving chip, and reduce the cost.

[0161] Exemplarily, the conductive layer comprises a gate metal layer, a source-drain metal layer and a transparent electrode layer which are sequentially stacked; the sampling resistor R0 is arranged in the same layer and of the same material as the gate metal layer, or the sampling resistor R0 is arranged in the same layer and of the same material as the source-drain metal layer, or the sampling resistor R0 is arranged in the same layer and of the same material as the transparent electrode layer. The above arrangement is beneficial to simplify the manufacturing process flow of the display panel. Further, the sheet resistance of the gate metal layer is 0.48Ω / sq, the sheet resistance of the source-drain metal layer is 0.06Ω / sq, and when the transparent electrode layer is an ITO layer, the sheet resistance of the ITO layer is 60Ω / sq-80Ω / sq. The sampling resistor R0 is generally 10MΩ-100MΩ.

[0162] In the display panel provided by the above embodiments, the sampling resistor R0 can convert the photosensitive current I1 into a photosensitive voltage signal U1, or convert the contrast current I2 into a contrast voltage signal U2, i.e., the second end of the sampling resistor R0 can directly output a voltage signal. The processing circuit 60, except for the sampling resistor R0, can be integrated in the driving chip, and the second end of the sampling resistor R0 can be directly coupled with the driving chip.

[0163] Further, the sampling resistor R0 can be directly manufactured in the peripheral area 40, and the signal line connected between the output end of the transistor structure and the ground signal input end can be directly block-designed, i.e., the block design acts as a resistor Loading as the sampling resistor R0. The above arrangement can realize a high-resistance resistor without excessively occupying the internal space of the display panel.

[0164] As shown in FIG. 8, in some embodiments, the first sampling sub-circuit 61 and the second sampling sub-circuit 62 further comprise a voltage follower A1, and further comprise at least one of a first resistor R1, a first capacitor C1 and a second capacitor C2.

[0165] The input end of the voltage follower A1 is coupled with the second end of the sampling resistor R0, and the output end of the voltage follower A1 is coupled with the output end for outputting the photosensitive voltage signal U1 or the contrast voltage signal U2.

[0166] The first end of the first capacitor C1 is coupled with the positive power supply end of the voltage follower A1, and the second end of the first capacitor C1 is coupled with the ground signal input end.

[0167] The first end of the second capacitor C2 is coupled with the output end for outputting the photosensitive voltage signal U1 or the contrast voltage signal U2, and the second end of the second capacitor C2 is coupled with the ground signal input end.

[0168] In the case where the sampling sub-circuit includes the first resistor R1, the output end of the voltage follower A1 is coupled with the output end for outputting the photosensitive voltage signal U1 or the contrast voltage signal U2 through the first resistor R1.

[0169] Illustratively, the first resistor R1, the first capacitor C1 and the second capacitor C2 have the function of noise reduction.

[0170] Illustratively, the first power supply input end of the voltage follower A1 is connected to the positive power supply signal, for example, +5V, and the second power supply input end of the voltage follower A1 is connected to the ground signal, but not limited thereto. The non-inverting input end of the voltage follower A1 is coupled with the second end of the sampling resistor R0, and the inverting input end of the voltage follower A1 is coupled with the output end of the voltage follower A1.

[0171] The sampling sub-circuit is set to the above structure, so that the high impedance characteristic of the voltage follower A1 can ensure that no current signal flows to the output end of the voltage follower A1, ensuring the accuracy of the photosensitive voltage signal U1 and the contrast voltage signal U2 transmitted to the first analog-to-digital conversion sub-circuit 63. It is worth noting that a resistor can also be connected between the inverting input end of the voltage follower A1 and the output end of the voltage follower A1 to realize the amplification function of the photosensitive voltage signal U1 and the contrast voltage signal U2.

[0172] As shown in FIGS. 9 and 10, in some embodiments, the first sampling sub-circuit 61 and the second sampling sub-circuit 62 specifically include a transimpedance amplification module 601 and an inverting amplification module 602.

[0173] The output end out0 of the transimpedance amplification module 601 is coupled with the inverting input end of the inverting amplification module 602; the inverting input end of the transimpedance amplification module 601 is coupled with the output end out1 of a corresponding set of photosensitive transistor structures 51, for converting the photosensitive current I1 into a photosensitive transition voltage Ua1; or, the inverting input end of the transimpedance amplification module 601 is coupled with the output end out2 of a corresponding set of contrast transistor structures 52, for converting the contrast current I2 into a contrast transition voltage Ua2.

[0174] The output end of the inverting amplification module 602 is coupled with the output end out3 of the sampling sub-circuit, for obtaining a photosensitive voltage signal U1 according to the photosensitive transition voltage Ua1, or, for obtaining a contrast voltage signal U2 according to the contrast transition voltage Ua2.

[0175] For example, in the first sampling sub-circuit 61, the inverting input end of the transimpedance amplification module 601 is coupled with the output end out1 of a corresponding set of photosensitive transistor structures 51, and the output end of the inverting amplification module 602 is coupled with the output end out3 of the first sampling sub-circuit. In the second sampling sub-circuit 62, the inverting input end of the transimpedance amplification module 601 is coupled with the output end out2 of a corresponding set of contrast transistor structures 52, and the output end of the inverting amplification module 602 is coupled with the output end out3 of the second sampling sub-circuit.

[0176] For example, the transimpedance amplification module 601 includes a transimpedance amplifier A2 and a second resistor R2; the non-inverting input end of the transimpedance amplifier A2 is coupled with a ground signal input end, and the inverting input end of the transimpedance amplifier A2 is coupled with the output end out1 of a corresponding set of photosensitive transistor structures 51 or the output end out2 of a corresponding set of contrast transistor structures 52; the first end of the second resistor R2 is coupled with the inverting input end of the transimpedance amplifier A2, and the second end of the second resistor R2 is coupled with the output end of the transimpedance amplifier A2.

[0177] The inverting amplification module 602 includes an inverting amplifier A3, a third resistor R3 and a fourth resistor R4; the first end of the third resistor R3 is coupled with the output end of the transimpedance amplifier A2, and the second end of the third resistor R3 is coupled with the inverting input end of the inverting amplifier A3; the first end of the fourth resistor R4 is coupled with the inverting input end of the inverting amplifier A3, and the second end of the fourth resistor R4 is coupled with the output end of the inverting amplifier A3; the non-inverting input end of the inverting amplifier A3 is coupled with a ground signal input end, and the output end of the inverting amplifier A3 is coupled with the output end out3 of the sampling sub-circuit.

[0178] The in-phase input terminal of the transimpedance amplifier A2 is coupled with a ground signal input terminal. The first power input terminal of the transimpedance amplifier A2 is connected to a positive power signal +VCC, and the second power input terminal of the transimpedance amplifier A2 is connected to a negative power signal -VCC. The first power input terminal of the inverting amplifier A3 is connected to the positive power signal +VCC, and the second power input terminal of the inverting amplifier A3 is connected to the negative power signal -VCC.

[0179] The transimpedance amplifier module 601 further includes a third capacitor C3, the first terminal of the third capacitor C3 being coupled with the first terminal of the second resistor R2, and the second terminal of the third capacitor C3 being coupled with the second terminal of the second resistor R2; and / or the inverting amplifier module 602 further includes a fourth capacitor C4, the first terminal of the fourth capacitor C4 being coupled with the first terminal of the fourth resistor R4, and the second terminal of the fourth capacitor C4 being coupled with the second terminal of the fourth resistor R4.

[0180] More specifically, as shown in FIG. 10, when the sampling sub-circuit adopts the above structure, the gate of the transistor structure can be connected to a ground signal, i.e. Vg=0V; the first electrode of the transistor structure can be connected to a square wave signal, the frequency of which is 10Hz, the high level is 9V, the low level is 0V, and the duty cycle is 40%; and the +VCC signal of each amplifier is 13V. The width-to-length ratio W / L of the transistor structure is 20000 / 2.5μm.

[0181] The transimpedance amplifier A2 is used to convert the photosensitive current I1 into a photosensitive transition voltage Ua1, or is used to convert the contrast current I2 into a contrast transition voltage Ua2. The formula Ua1=I1*R2, Ua2=I2*R2 is satisfied.

[0182] The inverting amplifier A3 is used to convert the photosensitive transition voltage Ua1 from a negative voltage into a positive voltage while amplifying, or is used to convert the contrast transition voltage Ua2 from a negative voltage into a positive voltage while amplifying. The amplification factor of the inverting amplifier A3 is the ratio between the resistance value of the fourth resistor R4 and the resistance value of the third resistor R3. The formula U1=Ua1*(R4 / R3), U2=Ua2*(R4 / R3) is satisfied.

[0183] The second resistor R2 is used to convert current into a voltage signal, and the resistance value is usually selected to be 0.1MΩ-100MΩ. The resistance value ratio R4 / R3 of the fourth resistor R4 and the third resistor R3 is 1KΩ-10KΩ.

[0184] The third capacitor C3 and the fourth capacitor C4 are used to reduce noise of the circuit, and the capacitance value of the third capacitor C3 is usually between 450pF-500pF, and the capacitance value of the fourth capacitor C4 is usually between 8pF-12pF.

[0185] More specifically, the photosensitive current I1 output by the photosensitive transistor structure 51 changes with the change of the external ambient light, and the reference current I2 output by the reference transistor structure 52 is not affected by the ambient light. When the current (e.g., I1 / I2) passes through the transimpedance amplifier A2, since the non-inverting input and the inverting input of the transimpedance amplifier A2 are high impedance, the current directly flows through the second resistor R2, and the current is directly converted into a transition voltage (e.g., Ua1 / Ua2). The non-inverting input of the transimpedance amplifier A2 is connected to the ground signal, and since the non-inverting input and the inverting input are at the same potential, the inverting input is also at zero potential, so the transition voltage is a negative voltage.

[0186] Since the input of the first analog-to-digital conversion sub-circuit 63 can only be a positive voltage, the inverting amplifier A3 is added to convert the negative voltage of the transition voltage into a positive voltage, and the transition voltage can be amplified based on the voltage, and the amplification factor is R4 / R3.

[0187] The output of the inverting amplifier A3 is directly connected to the first analog-to-digital conversion sub-circuit 63, and the voltage signal is read into the first analog-to-digital conversion sub-circuit 63. Then, the difference is calculated by the first digital operation circuit, and the ambient illuminance information X1 is determined by the first algorithm module 81, so as to realize the detection function of the ambient light according to the brightness of the ambient light.

[0188] The above structure is adopted for the sampling sub-circuit, so that the parallel resistance and capacitance in the circuit can reduce the noise of the surrounding circuit. Moreover, during the conversion of the current into the voltage signal, the voltage change amount can be amplified twice. In the transimpedance amplification module 601, the resistance value of the second resistor R2 determines the amplification factor, and in the inverting amplification module 602, the resistance value ratio of the fourth resistor R4 and the third resistor R3 determines the amplification factor. When the sampling sub-circuit is designed in the above structure, the illumination only needs to change by more than or equal to 5 Lux, and the driving chip can recognize and detect the obvious voltage change, which greatly improves the photosensitive detection precision and is suitable for high-specification products with higher requirements for photosensitive recognition precision.

[0189] As shown in FIGS. 11-14, in some embodiments, the photosensitive sensor 50 includes three groups of photosensitive transistor structures and one group of reference transistor structures;

[0190] The processing circuit 60 includes three first sampling sub-circuits 61 and one second sampling sub-circuit 62;

[0191] The output end Rout1 of the first group of photosensitive transistor structures 511 is coupled to the corresponding first sampling sub-circuit 61, and the first sampling sub-circuit 61 is configured to output a first photosensitive voltage signal U11 according to the first photosensitive current I11 output by the output end Rout1 of the first group of photosensitive transistor structures 511.

[0192] The output end Gout1 of the second group of light-sensing transistor structures 512 is coupled with a corresponding second first sub-circuit 61, and the second first sub-circuit 61 is configured to output a second light-sensing voltage signal U12 according to a second light-sensing current I12 output by the output end Gout1 of the second group of light-sensing transistor structures 512;

[0193] The output end Bout1 of the third group of light-sensing transistor structures 513 is coupled with a corresponding third first sub-circuit 61, and the third first sub-circuit 61 is configured to output a third light-sensing voltage signal U13 according to a third light-sensing current I13 output by the output end Bout1 of the third group of light-sensing transistor structures 513;

[0194] The display panel further comprises a red color filter shielding pattern CFR, a green color filter shielding pattern CFG, and a blue color filter shielding pattern CFB, the red color filter shielding pattern CFR covers the first group of light-sensing transistor structures 511, the green color filter shielding pattern covers the second group of light-sensing transistor structures 512, and the blue color filter shielding pattern covers the third group of light-sensing transistor structures 513;

[0195] The first analog-to-digital conversion sub-circuit 63 is coupled with the three first sub-circuits 61 and the second sub-circuit 62, and is configured to convert the first light-sensing voltage signal U11 into a first digital light-sensing signal U011, convert the second light-sensing voltage signal U12 into a second digital light-sensing signal U012, and convert the third light-sensing voltage signal U13 into a third digital light-sensing signal U013;

[0196] The first digital operation sub-circuit 64 is configured to perform difference calculation on the first digital light-sensing signal U011 and the digital reference signal to obtain a first digital difference signal, perform difference calculation on the second digital light-sensing signal U012 and the digital reference signal to obtain a second digital difference signal, and perform difference calculation on the third digital light-sensing signal U013 and the digital reference signal to obtain a third digital difference signal;

[0197] The first algorithm module 81 is configured to determine the ambient illuminance information X1 according to the first digital difference signal, the second digital difference signal, or the third digital difference signal;

[0198] The processing circuit 60 further comprises a second algorithm module 82, which is coupled with the first digital operation sub-circuit 64, and the second algorithm module 82 is configured to determine color temperature detection information X2 according to the first digital difference signal, the second digital difference signal, and the third digital difference signal;

[0199] The display panel further comprises a second control circuit 72, the second control circuit 72 is coupled with the second algorithm module 82, and the second control circuit 72 is configured to adjust the screen display color temperature of the display panel according to the color temperature detection information X2.

[0200] For example, the red color film shielding pattern CFR is formed in the same process as the red color film layer in the display panel, the green color film shielding pattern CFG is formed in the same process as the green color film layer in the display panel, and the blue color film shielding pattern CFB is formed in the same process as the blue color film layer in the display panel, but not limited thereto.

[0201] For example, the first algorithm module 81 is configured to determine the ambient illuminance information X1 according to any one of the first digital difference signal, the second digital difference signal and the third digital difference signal.

[0202] For example, the second control circuit 72 can be integrated in the driving chip included in the display panel, but not limited thereto. For example, the second control circuit 72 is configured to adjust the screen filter according to the color temperature detection information X2, so as to adjust the screen display color temperature of the display panel.

[0203] It should be noted that the color temperature is an index specially used to measure and calculate the color component in the light in the display panel.

[0204] For example, as shown in FIG. 14, the sampling resistors R0 coupled with the transistor structures in each group can be directly manufactured in the peripheral area 40 of the display panel, that is, independent of the driving chip.

[0205] The above setting mode enables the three groups of phototransistor structures to provide the first photosensitive current I11, the second photosensitive current I12 and the third photosensitive current I13 corresponding to the cases of irradiation of R, G and B colors, that is, different spectral response curves corresponding to the cases of irradiation of R, G and B colors are provided. Further, the first first sub-circuit 61 outputs a first photosensitive voltage signal U11 according to the first photosensitive current I11; the second first sub-circuit 61 outputs a second photosensitive voltage signal U12 according to the second photosensitive current I12; the third first sub-circuit 61 outputs a third photosensitive voltage signal U13 according to the third photosensitive current I13; the first analog-digital conversion sub-circuit 63 converts the first photosensitive voltage signal U11 into a first digital photosensitive signal U011, converts the second photosensitive voltage signal U12 into a second digital photosensitive signal U012, and converts the third photosensitive voltage signal U13 into a third digital photosensitive signal U013; the first digital operation sub-circuit 64 performs difference calculation on the first digital photosensitive signal U011 and the digital reference signal to obtain a first digital difference signal, performs difference calculation on the second digital photosensitive signal U012 and the digital reference signal to obtain a second digital difference signal, and performs difference calculation on the third digital photosensitive signal U013 and the digital reference signal to obtain a third digital difference signal.

[0206] The first algorithm module 81 can determine the ambient illuminance information X1 according to the first digital difference signal, the second digital difference signal or the third digital difference signal; and the first control circuit 71 adjusts the screen display brightness of the display panel according to the ambient illuminance information X1.

[0207] The second algorithm module 82 can determine color temperature detection information X2 according to the first digital difference signal, the second digital difference signal and the third digital difference signal; and the second control circuit 72 adjusts the screen display color temperature of the display panel according to the color temperature detection information X2.

[0208] Therefore, the above setting mode enables the display panel to automatically detect the ambient light brightness, and adjusts the screen display brightness in real time according to the detected ambient illuminance information X1, thereby effectively improving the display quality of the display panel and the market competitiveness of the display product.

[0209] Meanwhile, the above setting mode enables the display panel to automatically detect the ambient light color temperature, and adjusts the screen display brightness and color temperature in real time according to the detected color temperature detection information X2, so that the display panel can realize the different color temperature adaptive function, that is, can adjust the screen filter according to the change of the intensity of the external ambient light, to achieve the comfortable effect of the human eye.

[0210] In some embodiments, the display panel comprises a driving chip, and the first analog-digital conversion sub-circuit 63, the first digital operation sub-circuit 64, the first algorithm module 81 and the second algorithm module 82 are all integrated in the driving chip; in each first sampling sub-circuit 61 and each second sampling sub-circuit 62, except the sampling resistor R0, other parts are integrated in the driving chip.

[0211] The above arrangement makes the sampling resistor R0 independent of the driving chip when the sampling sub-circuit comprises the sampling resistor R0, and the other structures in the processing circuit 60 except the sampling resistor R0 are integrated in the driving chip, which not only helps to reduce the size and cost of the driving chip and facilitate integrated management, but also effectively utilizes the idle space of the display panel peripheral area 40 and avoids increasing the frame width of the display panel.

[0212] As shown in FIG. 15 and FIG. 16, in some embodiments, the light-sensing transistor structure 51 is arranged one-to-one corresponding to the contrast transistor structure 52, the output end out1 of the corresponding light-sensing transistor structure 51 is coupled with the output end out2 of the contrast transistor structure 52 to form a common output end out4, and the common output end out4 is used to output a difference current signal ΔI, which is obtained by subtracting the light-sensing current I1 from the contrast current I2;

[0213] The processing circuit 60 comprises a conversion sub-circuit 65, a second analog-digital conversion sub-circuit 66 and a first algorithm module 81.

[0214] The conversion sub-circuit 65 is connected between the common output end out4 and the second analog-digital conversion sub-circuit 66, and is used to convert the difference current signal ΔI into a difference voltage signal ΔU.

[0215] The second analog-digital conversion sub-circuit 66 is used to convert the difference voltage signal ΔU into a digital difference signal.

[0216] The first algorithm module 81 is coupled with the second analog-digital conversion sub-circuit 66, and is used to determine the ambient illuminance information X1 according to the digital difference signal.

[0217] For example, as shown in FIG. 16, the photosensitive sensor 50 includes a corresponding set of photosensitive transistor structures 51 and a set of reference transistor structures 52. The photosensitive current I1 output by the set of photosensitive transistor structures 51 is subtracted from the reference current I2 output by the set of reference transistor structures 52 to obtain a difference current signal ΔI, i.e., ΔI = I1 - I2. The difference current signal ΔI is converted by the conversion sub-circuit 65 to obtain a difference voltage signal ΔU, i.e., ΔU = ΔI * R5. The difference voltage signal ΔU can be directly transmitted to the second analog-digital conversion sub-circuit 66.

[0218] The above arrangement allows the difference current signal ΔI and the difference voltage signal ΔU to be obtained outside the driving chip. Then, the difference voltage signal ΔU is transmitted to the second analog-digital conversion sub-circuit 66 to directly obtain a digital difference signal. This arrangement eliminates the digital operation sub-circuit, further simplifies the processing circuit 60, and reduces the internal complexity of the driving chip, thereby further reducing the size of the driving chip and lowering the cost.

[0219] Moreover, the above arrangement eliminates the complex sampling sub-circuit, further simplifies the processing circuit 60, and reduces the internal complexity of the driving chip, thereby further reducing the size of the driving chip (by about 10 μm) and lowering the cost.

[0220] As shown in FIGS. 17 and 18, in some embodiments, the photosensitive sensor 50 includes three sets of photosensitive transistor structures and three sets of reference transistor structures.

[0221] The output end Rout1 of the first set of photosensitive transistor structures 511 is coupled to the output end of the corresponding first set of reference transistor structures 521 to form a first common output end out41. The first common output end out41 is used to output a first difference current signal ΔI1, which is obtained by subtracting the first reference current I21 output by the output end of the first set of reference transistor structures 521 from the first photosensitive current I11 output by the output end Rout1 of the first set of photosensitive transistor structures 511.

[0222] The output end Gout1 of the second set of photosensitive transistor structures 512 is coupled to the output end of the corresponding second set of reference transistor structures 522 to form a second common output end out42. The second common output end out42 is used to output a second difference current signal ΔI2, which is obtained by subtracting the second reference current I22 output by the output end of the second set of reference transistor structures 522 from the second photosensitive current I12 output by the output end Gout1 of the second set of photosensitive transistor structures 512.

[0223] The output end Bout1 of the third group of light sensing transistor structures 513 is coupled with the output end of the corresponding third group of control transistor structures 523 to form a third common output end out43, which is used to output a third difference current signal ΔI3, which is obtained by subtracting the third control current I23 output by the output end of the third group of control transistor structures 523 from the third light sensing current I13 output by the output end Bout1 of the third group of light sensing transistor structures 513;

[0224] The display panel further comprises a red color film shielding pattern CFR, a green color film shielding pattern CFG, and a blue color film shielding pattern CFB, the red color film shielding pattern CFR covers the first group of light sensing transistor structures 511, the green color film shielding pattern covers the second group of light sensing transistor structures 512, and the blue color film shielding pattern covers the third group of light sensing transistor structures 513.

[0225] The processing circuit comprises a first conversion sub-circuit 651, a second conversion sub-circuit 652, a third conversion sub-circuit 653, and a second algorithm module 82.

[0226] The first conversion sub-circuit 651 is connected between the first common output end out41 and the second analog-digital conversion sub-circuit 66, and is used to convert the first difference current signal ΔI1 into a first difference voltage signal ΔU1.

[0227] The second conversion sub-circuit 652 is connected between the second common output end out42 and the second analog-digital conversion sub-circuit 66, and is used to convert the second difference current signal ΔI2 into a second difference voltage signal ΔU2.

[0228] The third conversion sub-circuit 653 is connected between the third common output end out43 and the second analog-digital conversion sub-circuit 66, and is used to convert the third difference current signal ΔI3 into a third difference voltage signal ΔU3.

[0229] The second analog-digital conversion sub-circuit 66 is used to convert the first difference voltage signal ΔU1 into a first digital difference signal, convert the second difference voltage signal ΔU2 into a second digital difference signal, and convert the third difference voltage signal ΔU3 into a third digital difference signal.

[0230] The first algorithm module 81 is used to determine the ambient illuminance information X1 according to the first digital difference signal, the second digital difference signal, or the third digital difference signal.

[0231] The second algorithm module 82 is configured to determine color temperature detection information X2 according to the first digital difference value signal, the second digital difference value signal and the third digital difference value signal.

[0232] The display panel further comprises a second control circuit 72, which is coupled with the second algorithm module 82. The second control circuit 72 is configured to adjust the screen display color temperature of the display panel according to the color temperature detection information X2.

[0233] For example, the conversion resistors R5 coupled with the respective groups of transistor structures can be directly fabricated in the peripheral area 40 of the display panel, i.e., independently of the driving chip.

[0234] The above arrangement can provide the first difference current signal ΔI1, the second difference current signal ΔI2 and the third difference current signal ΔI3 corresponding to the case of irradiation of R, G and B colors, i.e., different spectral response curves corresponding to the case of irradiation of R, G and B colors are provided. Further, the first conversion sub-circuit 651 converts the first difference current signal ΔI1 into a first difference voltage signal ΔU1; the second conversion sub-circuit 652 converts the second difference current signal ΔI2 into a second difference voltage signal ΔU2; the third conversion sub-circuit 653 converts the third difference current signal ΔI3 into a third difference voltage signal ΔU3; and the second analog-digital conversion sub-circuit 66 converts the first difference voltage signal ΔU1 into a first digital difference value signal, converts the second difference voltage signal ΔU2 into a second digital difference value signal, and converts the third difference voltage signal ΔU3 into a third digital difference value signal.

[0235] The first algorithm module 81 can determine the ambient illuminance information X1 according to the first digital difference value signal, the second digital difference value signal or the third digital difference value signal; and the first control circuit 71 adjusts the screen display brightness of the display panel according to the ambient illuminance information X1.

[0236] The second algorithm module 82 can determine the color temperature detection information X2 according to the first digital difference value signal, the second digital difference value signal and the third digital difference value signal; and the second control circuit 72 adjusts the screen display color temperature of the display panel according to the color temperature detection information X2.

[0237] Therefore, the above setting mode realizes that the display panel can automatically detect the ambient light brightness, and adjusts the display brightness of the screen in real time according to the detected ambient illuminance information X1, thereby effectively improving the display quality of the display panel and the market competitiveness of the display product. At the same time, the above setting mode realizes that the display panel can automatically detect the ambient light color temperature, and adjusts the display brightness and color temperature of the screen in real time according to the detected color temperature detection information X2, so that the display panel can realize the different color temperature adaptive function, that is, can adjust the screen filter according to the strength change of the external environment light, to achieve the comfortable effect of the human eye.

[0238] In addition, the above setting mode makes the acquisition processes of the difference current signal and the difference voltage signal be completed outside the driving chip, then the difference voltage signal is transmitted to the second analog-digital conversion sub-circuit 66, and the digital difference signal is directly obtained through the second analog-digital conversion sub-circuit 66. This setting mode saves the digital operation sub-circuit, further simplifies the processing circuit 60, and simplifies the internal complexity of the driving chip, thereby further reducing the size of the driving chip and reducing the cost. Moreover, the above setting mode saves the complex sampling sub-circuit, further simplifies the processing circuit 60, and simplifies the internal complexity of the driving chip, thereby further reducing the size of the driving chip (reducing about 10 μm) and reducing the cost.

[0239] As shown in FIG. 16, in some embodiments, the conversion sub-circuit 65 includes a conversion resistor R5, a first end of the conversion resistor R5 is coupled with the common output end out4, and a second end of the conversion resistor R5 is coupled with the second analog-digital conversion sub-circuit 66; the display panel includes a conductive layer, and the conversion resistor R5 is arranged in the same layer and same material as the conductive layer.

[0240] The above setting mode not only can form the conversion resistor R5 and the conductive layer at the same time in the same patterning process, without increasing the process flow specially used for manufacturing the conversion resistor R5, but also can directly manufacture the conversion resistor R5 in the peripheral area 40, that is, independently from the driving chip, which is beneficial to simplify the internal structure of the driving chip, reduce the volume of the driving chip, reduce the height of the driving chip, and reduce the cost.

[0241] For example, the conductive layer includes a gate metal layer, a source-drain metal layer and a transparent electrode layer which are sequentially stacked; the conversion resistor R5 is arranged in the same layer and same material as the gate metal layer, or the conversion resistor R5 is arranged in the same layer and same material as the source-drain metal layer, or the conversion resistor R5 is arranged in the same layer and same material as the transparent electrode layer. The above setting mode is beneficial to simplify the manufacturing process flow of the display panel.

[0242] In the display panel provided in the above embodiment, the conversion resistor R5 can convert the difference current signal ΔI into a difference voltage signal ΔU, that is, the second end of the conversion resistor R5 can directly output the difference voltage signal ΔU, and the processing circuit 60 except the conversion resistor R5 can be integrated in the driving chip, and the second end of the conversion resistor R5 can be directly coupled with the driving chip.

[0243] Further, the conversion resistor R5 is directly manufactured in the peripheral area 40, and the signal line connected between the output end of the transistor structure and the second analog-digital conversion sub-circuit 66 can be directly designed in a block, that is, the block design serves as a resistor Loading as the conversion resistor R5. The above setting manner can not only realize a high-resistance resistor, but also does not excessively occupy the internal space of the display panel.

[0244] In some embodiments, the display panel includes a driving chip, and the second analog-digital conversion sub-circuit 66, the first algorithm module 81 and the second algorithm module 82 are integrated in the driving chip.

[0245] The above setting manner not only facilitates to reduce the size and cost of the driving chip and facilitate integrated management, but also can effectively utilize the idle space of the peripheral area 40 of the display panel, and avoid increasing the frame width of the display panel.

[0246] The display device provided in the above embodiment includes the display panel provided in the above embodiment.

[0247] It should be noted that the display device can be any product or component with a display function, such as a television, a display, a digital photo frame, a mobile phone, a tablet computer and the like, and the display device further includes a flexible circuit board, a printed circuit board, a back plate and the like.

[0248] In the display panel provided in the above embodiment, the photosensitive sensor 50, the processing circuit 60 and the first control circuit 71 are integrated in the peripheral area 40 of the display panel, which not only realizes integrated design, but also improves the additional function of the display panel and effectively reduces the overall volume of the display product. Moreover, in the display panel provided in the above embodiment, the ambient light brightness can be automatically detected, and the screen display brightness can be adjusted in real time, which effectively improves the display quality of the display panel and the market competitiveness of the display product. Therefore, the display device provided in the above embodiment also has the above beneficial effects when including the display panel, and details are not described herein.

[0249] The display panel provided in the above embodiment includes the display panel provided in the above embodiment.

[0250] At least one set of light sensing transistor structures 51 in the light sensing sensor 50 senses ambient light and outputs a light sensing current I1; at least one set of reference transistor structures 52 in the light sensing sensor 50 is not affected by ambient light and outputs a reference current I2;

[0251] The processing circuit 60 determines ambient illumination information X1 according to the light sensing current I1 and the reference current I2;

[0252] The first control circuit 71 adjusts the screen display brightness of the display panel according to the ambient illumination information X1.

[0253] When the display panel is driven by the driving method provided by the embodiments of the present disclosure, the automatic detection of ambient light to adjust the screen display brightness function can be realized, and the overall space of the display product can be saved.

[0254] In some embodiments, the processing circuit 60 includes at least one first sub-circuit 61, at least one second sub-circuit 62, a first analog-to-digital conversion sub-circuit 63, a first digital operation sub-circuit 64, and a first algorithm module 81; the first sub-circuit 61 is coupled to the output end out1 of a corresponding set of light sensing transistor structures 51; the second sub-circuit 62 is coupled to the output end out2 of a corresponding set of reference transistor structures 52; the first analog-to-digital conversion sub-circuit 63 is coupled to the first sub-circuit 61 and the second sub-circuit 62 respectively; the first digital operation sub-circuit 64 is coupled to the first analog-to-digital conversion sub-circuit 63; and the first algorithm module 81 is coupled to the first digital operation sub-circuit 64.

[0255] The driving method specifically includes:

[0256] The first sub-circuit 61 outputs a light sensing voltage signal U1 according to the light sensing current I1 output by the set of light sensing transistor structures 51;

[0257] The second sub-circuit 62 outputs a reference voltage signal U2 according to the reference current I2 output by the set of reference transistor structures 52;

[0258] The first analog-to-digital conversion sub-circuit 63 converts the light sensing voltage signal U1 into a digital light sensing signal U01, and converts the reference voltage signal U2 into a digital reference signal U02;

[0259] The first digital operation sub-circuit 64 performs difference calculation on the digital light sensing signal U01 and the digital reference signal U02 to obtain a digital difference signal;

[0260] The first algorithm module 81 determines the ambient illumination information X1 according to the digital difference signal.

[0261] When the display panel is driven by the driving method provided in the above embodiment, when the ambient illumination information X1 indicates that the ambient light is too low or too high, the first control circuit 71 can adjust the backlight current of the display panel in real time according to the ambient illumination, so as to realize the function of adjusting the screen display brightness.

[0262] In some embodiments, the photosensitive sensor 50 includes three groups of photosensitive transistor structures and one group of reference transistor structures; the processing circuit 60 includes three first sub-circuits 61 and one second sub-circuit 62; the output end Rout1 of the first group of photosensitive transistor structures 511 is coupled with a corresponding first first sub-circuit 61, the output end Gout1 of the second group of photosensitive transistor structures 512 is coupled with a corresponding second first sub-circuit 61, the output end Bout1 of the third group of photosensitive transistor structures 513 is coupled with a corresponding third first sub-circuit 61, and the first analog-to-digital conversion sub-circuit 63 is coupled with the three first sub-circuits 61 and the one second sub-circuit 62; the processing circuit 60 further includes a second algorithm module 82, which is coupled with the first digital operation sub-circuit 64; the display panel further includes a second control circuit 72, which is coupled with the second algorithm module 82;

[0263] The driving method specifically includes:

[0264] The first first sub-circuit 61 outputs a first photosensitive voltage signal U11 according to a first photosensitive current I11 output by the output end Rout1 of the first group of photosensitive transistor structures 511;

[0265] The second first sub-circuit 61 outputs a second photosensitive voltage signal U12 according to a second photosensitive current I12 output by the output end Gout1 of the second group of photosensitive transistor structures 512;

[0266] The third first sub-circuit 61 outputs a third photosensitive voltage signal U13 according to a third photosensitive current I13 output by the output end Bout1 of the third group of photosensitive transistor structures 513;

[0267] The display panel further includes a red color filter shielding pattern CFR, a green color filter shielding pattern CFG, and a blue color filter shielding pattern CFB; the red color filter shielding pattern CFR covers the first group of photosensitive transistor structures 511, the green color filter shielding pattern covers the second group of photosensitive transistor structures 512, and the blue color filter shielding pattern covers the third group of photosensitive transistor structures 513;

[0268] The first analog-to-digital conversion sub-circuit 63 converts the first light-sensing voltage signal U11 into a first digital light-sensing signal U011, converts the second light-sensing voltage signal U12 into a second digital light-sensing signal U012, and converts the third light-sensing voltage signal U13 into a third digital light-sensing signal U013;

[0269] The first digital operation sub-circuit 64 performs difference calculation on the first digital light-sensing signal U011 and the digital reference signal to obtain a first digital difference signal, performs difference calculation on the second digital light-sensing signal U012 and the digital reference signal to obtain a second digital difference signal, and performs difference calculation on the third digital light-sensing signal U013 and the digital reference signal to obtain a third digital difference signal.

[0270] The first algorithm module 81 determines the ambient illuminance information X1 according to the first digital difference signal, the second digital difference signal, or the third digital difference signal.

[0271] The second algorithm module 82 determines color temperature detection information X2 according to the first digital difference signal, the second digital difference signal, and the third digital difference signal.

[0272] The second control circuit 72 adjusts the screen display color temperature of the display panel according to the color temperature detection information X2.

[0273] When the display panel is driven by the above driving method, the display panel can automatically detect the ambient light brightness, and the display brightness of the screen can be adjusted in real time according to the detected ambient illuminance information X1, thereby effectively improving the display quality of the display panel and the market competitiveness of the display product. Meanwhile, when the display panel is driven by the above driving method, the display panel can automatically detect the ambient light color temperature, and the display brightness and color temperature of the screen can be adjusted in real time according to the detected color temperature detection information X2, so that the display panel can realize different color temperature adaptive functions, that is, the screen filter can be adjusted according to the strength change of the external ambient light, so as to achieve a comfortable effect for the human eye.

[0274] In some embodiments, the light-sensing transistor structure 51 corresponds to the reference transistor structure 52 one-to-one, the output end out1 of the corresponding light-sensing transistor structure 51 is coupled with the output end out2 of the reference transistor structure 52 to form a common output end out4; the processing circuit 60 includes a conversion sub-circuit 65, a second analog-to-digital conversion sub-circuit 66, and a first algorithm module 81; the conversion sub-circuit 65 is connected between the common output end out4 and the second analog-to-digital conversion sub-circuit 66, and the first algorithm module 81 is coupled with the second analog-to-digital conversion sub-circuit 66.

[0275] The common output end out4 outputs a difference current signal ΔI, which is obtained by subtracting the contrast current I2 from the photosensitive current I1;

[0276] The conversion sub-circuit 65 converts the difference current signal ΔI into a difference voltage signal ΔU;

[0277] The second analog-digital conversion sub-circuit 66 converts the difference voltage signal ΔU into a digital difference signal;

[0278] The first algorithm module 81 determines the ambient illuminance information X1 according to the digital difference signal.

[0279] When the display panel is driven by the above driving method, the acquisition processes of the difference current signal ΔI and the difference voltage signal ΔU are both completed outside the driving chip, then the difference voltage signal ΔU is transmitted to the second analog-digital conversion sub-circuit 66, and the digital difference signal is directly obtained through the second analog-digital conversion sub-circuit 66. This driving method saves the digital operation sub-circuit, further simplifies the processing circuit 60, and simplifies the internal complexity of the driving chip, thereby further reducing the size of the driving chip and lowering the cost.

[0280] Moreover, when the display panel is driven by the above driving method, the complex sampling sub-circuit is saved, the processing circuit 60 is further simplified, the internal complexity of the driving chip is simplified, thereby further reducing the size of the driving chip and lowering the cost.

[0281] In some embodiments, the photosensitive sensor 50 includes three groups of photosensitive transistor structures and three groups of reference transistor structures; the output end Rout1 of the first group of photosensitive transistor structures 511 is coupled with the output end of the corresponding first group of reference transistor structures 521 to form a first common output end out41, the output end Gout1 of the second group of photosensitive transistor structures 512 is coupled with the output end of the corresponding second group of reference transistor structures 522 to form a second common output end out42, and the output end Bout1 of the third group of photosensitive transistor structures 513 is coupled with the output end of the corresponding third group of reference transistor structures 523 to form a third common output end out43; the display panel further includes a red color filter shielding pattern CFR, a green color filter shielding pattern CFG, and a blue color filter shielding pattern CFB, the red color filter shielding pattern CFR covers the first group of photosensitive transistor structures 511, the green color filter shielding pattern covers the second group of photosensitive transistor structures 512, and the blue color filter shielding pattern covers the third group of photosensitive transistor structures 513; the processing circuit includes a first conversion sub-circuit 651, a second conversion sub-circuit 652, a third conversion sub-circuit 653, and a second algorithm module 82; the first conversion sub-circuit 651 is connected between the first common output end out41 and the second analog-digital conversion sub-circuit 66, the second conversion sub-circuit 652 is connected between the second common output end out42 and the second analog-digital conversion sub-circuit 66, the third conversion sub-circuit 653 is connected between the third common output end out43 and the second analog-digital conversion sub-circuit 66, and the display panel further includes a second control circuit 72 coupled with the second algorithm module 82.

[0282] The first common output end out41 outputs a first difference current signal ΔI1, which is obtained by subtracting a first reference current I21 output by the output end of the first group of reference transistor structures 521 from a first photosensitive current I11 output by the output end Rout1 of the first group of photosensitive transistor structures 511;

[0283] The second common output end out42 outputs a second difference current signal ΔI2, which is obtained by subtracting a second reference current I22 output by the output end of the second group of reference transistor structures 522 from a second photosensitive current I12 output by the output end Gout1 of the second group of photosensitive transistor structures 512;

[0284] The third common output end out43 outputs a third difference current signal ΔI3, which is obtained by subtracting a third comparison current I23 output by an output end of a third comparison transistor structure 523 from a third photoelectric current I13 output by an output end Bout1 of a third group of photoelectric transistor structures 513;

[0285] The first conversion sub-circuit 651 converts the first difference current signal ΔI1 into a first difference voltage signal ΔU1;

[0286] The second conversion sub-circuit 652 converts the second difference current signal ΔI2 into a second difference voltage signal ΔU2;

[0287] The third conversion sub-circuit 653 converts the third difference current signal ΔI3 into a third difference voltage signal ΔU3;

[0288] The second analog-digital conversion sub-circuit 66 converts the first difference voltage signal ΔU1 into a first digital difference signal, converts the second difference voltage signal ΔU2 into a second digital difference signal, and converts the third difference voltage signal ΔU3 into a third digital difference signal;

[0289] The first algorithm module 81 determines the ambient illuminance information X1 according to the first digital difference signal, the second digital difference signal, or the third digital difference signal;

[0290] The second algorithm module 82 determines color temperature detection information X2 according to the first digital difference signal, the second digital difference signal, and the third digital difference signal;

[0291] The second control circuit 72 adjusts the screen display color temperature of the display panel according to the color temperature detection information X2.

[0292] When the display panel is driven by the above driving method, the display panel can automatically detect the ambient light brightness, and the display brightness of the screen can be adjusted in real time according to the detected ambient illuminance information X1, thereby effectively improving the display quality of the display panel and the market competitiveness of the display product. Meanwhile, when the display panel is driven by the above driving method, the display panel can automatically detect the ambient light color temperature, and the display brightness and color temperature of the screen can be adjusted in real time according to the detected color temperature detection information X2, so that the display panel can realize the different color temperature adaptive function, that is, the screen filter can be adjusted according to the change of the external ambient light, so as to achieve the comfortable effect of the human eye.

[0293] In addition, when the display panel is driven by using the driving method, the obtaining processes of the difference current signal and the difference voltage signal are both completed outside the driving chip, and then the difference voltage signal is transmitted to the second analog-digital conversion sub-circuit 66 to directly obtain the digital difference signal by the second analog-digital conversion sub-circuit 66. When the display panel is driven by using the driving method, the digital operation sub-circuit is omitted, the processing circuit 60 is further simplified, the internal complexity of the driving chip is simplified, and thus the size of the driving chip is further reduced, and the cost is reduced. Moreover, when the display panel is driven by using the driving method, the complex sampling sub-circuit is omitted, the processing circuit 60 is further simplified, the internal complexity of the driving chip is simplified, and thus the size of the driving chip is further reduced (reduced by about 10 μm), and the cost is reduced.

[0294] It should be noted that the "same layer" of the embodiments of the present disclosure can refer to a film layer on the same structure layer. Or for example, the film layers on the same layer can be a layer structure formed by using the same film forming process to form a film layer for forming a specific pattern, and then patterning the film layer by using the same mask plate through a one-time patterning process. According to different specific patterns, the one-time patterning process can include multiple exposure, development or etching processes, and the specific patterns in the formed layer structure can be continuous or discontinuous. These specific patterns can also be at different heights or have different thicknesses.

[0295] In the method embodiments of the present disclosure, the serial numbers of the steps cannot be used to limit the sequence of the steps, and for those skilled in the art, the changes of the sequence of the steps without creative labor are within the protection scope of the present disclosure.

[0296] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the differences from other embodiments. Especially, for the method embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the related parts can be referred to the part of the description of the product embodiments.

[0297] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the same meaning as commonly understood by one of ordinary skill in the art to which this present disclosure belongs. The terms "first", "second", and similar terms are used herein merely to distinguish one element from another, and are not intended to imply any order or sequence in time. The terms "comprises", "comprising", "includes", "including" and the like are not intended to exclude a combination of elements or a combination of steps. The terms "coupled", "connected", and "linked" and the like are not restricted to a direct coupling, connection or linking but also include an indirect coupling, connection or linking. The terms "upper", "lower", "left", "right" and the like are used for description only and are not intended to restrict the position of an object described.

[0298] It can be understood that when an element such as a layer, a film, a region, or a substrate is referred to as being "on" or "under" another element, it can be "directly on" or "directly under" the other element, or one or more intervening elements can also be present.

[0299] In the description of the above embodiments, the specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0300] The above description is merely illustrative of the disclosure and does not limit the scope of the disclosure. Any modifications made within the spirit and principles of the disclosure shall be considered within the scope of the disclosure. Therefore, the scope of the disclosure should be determined by the scope of the claims.

Claims

1. A display panel, comprising: The display panel further comprises: a display area and a peripheral area located at the periphery of the display area, the display panel further comprising: a photosensitive sensor located in the peripheral area, the photosensitive sensor comprising at least one set of photosensitive transistor structures and at least one set of reference transistor structures; the at least one set of photosensitive transistor structures are used for sensing ambient light and outputting photosensitive current; the at least one set of reference transistor structures are not affected by ambient light and are used for outputting reference current; a processing circuit located in the peripheral area, the processing circuit being coupled with the output terminals of the at least one set of photosensitive transistor structures and also coupled with the output terminals of the at least one set of reference transistor structures, and being used for determining ambient illuminance information according to the photosensitive current and the reference current; 2. The display panel of claim 1, wherein, a first control circuit located in the peripheral area, the first control circuit being coupled with the processing circuit and being used for adjusting the screen display brightness of the display panel according to the ambient illuminance information. The processing circuit comprises at least one first sampling sub-circuit, at least one second sampling sub-circuit, a first analog-to-digital conversion sub-circuit, a first digital operation sub-circuit and a first algorithm module; the first sampling sub-circuit is coupled with the output terminal of a corresponding set of photosensitive transistor structures and is used for outputting a photosensitive voltage signal according to the photosensitive current output by the set of photosensitive transistor structures; the second sampling sub-circuit is coupled with the output terminal of a corresponding set of reference transistor structures and is used for outputting a reference voltage signal according to the reference current output by the set of reference transistor structures; the first analog-to-digital conversion sub-circuit is coupled with the first sampling sub-circuit and the second sampling sub-circuit respectively and is used for converting the photosensitive voltage signal into a digital photosensitive signal and converting the reference voltage signal into a digital reference signal; the first digital operation sub-circuit is coupled with the first analog-to-digital conversion sub-circuit and is used for performing difference calculation on the digital photosensitive signal and the digital reference signal to obtain a digital difference signal; 3. The display panel of claim 2, wherein, the first algorithm module is coupled with the first digital operation sub-circuit and is used for determining the ambient illuminance information according to the digital difference signal. The first sampling sub-circuit and the second sampling sub-circuit specifically comprise:

4. The display panel of claim 3, wherein, a sampling resistor, a first end of the sampling resistor being coupled with a ground signal input terminal; a second end of the sampling resistor being coupled with the output terminal of a corresponding set of photosensitive transistor structures or a corresponding set of reference transistor structures; and the second end of the sampling resistor being coupled with the output terminal of a sampling sub-circuit, which is used for outputting a photosensitive voltage signal or a reference voltage signal. The first sampling sub-circuit and the second sampling sub-circuit further comprise a voltage follower, and at least one of a first resistor, a first capacitor and a second capacitor; an input terminal of the voltage follower is coupled with the second end of the sampling resistor; and an output terminal of the voltage follower is coupled with the output terminal used for outputting the photosensitive voltage signal or the reference voltage signal; a first end of the first capacitor is coupled with a positive power supply terminal of the voltage follower; and a second end of the first capacitor is coupled with the ground signal input terminal. A first end of the second capacitor is coupled to an output end for outputting a photoelectric voltage signal or a reference voltage signal, and a second end of the second capacitor is coupled to a ground signal input end. In a case where the sampling sub-circuit includes a first resistor, an output end of the voltage follower is coupled to the output end for outputting the photoelectric voltage signal or the reference voltage signal through the first resistor.

5. The display panel of claim 3, wherein, The display panel includes a conductive layer, and the sampling resistor is arranged in the same layer and of the same material as the conductive layer.

6. The display panel of claim 5, wherein, The conductive layer includes a gate metal layer, a source-drain metal layer and a transparent electrode layer which are sequentially stacked, and the sampling resistor is arranged in the same layer and of the same material as the gate metal layer, or the sampling resistor is arranged in the same layer and of the same material as the source-drain metal layer, or the sampling resistor is arranged in the same layer and of the same material as the transparent electrode layer.

7. The display panel of claim 2, wherein, The first sampling sub-circuit and the second sampling sub-circuit specifically include a transimpedance amplification module and an inverting amplification module. An output end of the transimpedance amplification module is coupled to an inverting input end of the inverting amplification module, an inverting input end of the transimpedance amplification module is coupled to an output end of a corresponding group of photoelectric transistor structures for converting photoelectric current into a photoelectric transition voltage, or the inverting input end of the transimpedance amplification module is coupled to an output end of a corresponding group of reference transistor structures for converting reference current into a reference transition voltage. An output end of the inverting amplification module is coupled to an output end of the sampling sub-circuit, for obtaining a photoelectric voltage signal according to the photoelectric transition voltage, or for obtaining a reference voltage signal according to the reference transition voltage.

8. The display panel of claim 7, wherein The transimpedance amplification module includes a transimpedance amplifier and a second resistor, a non-inverting input end of the transimpedance amplifier is coupled to a ground signal input end, and an inverting input end of the transimpedance amplifier is coupled to an output end of a corresponding group of photoelectric transistor structures or an output end of a corresponding group of reference transistor structures; a first end of the second resistor is coupled to the inverting input end of the transimpedance amplifier, and a second end of the second resistor is coupled to an output end of the transimpedance amplifier. The inverting amplification module includes an inverting amplifier, a third resistor and a fourth resistor; a first end of the third resistor is coupled to the output end of the transimpedance amplifier, and a second end of the third resistor is coupled to an inverting input end of the inverting amplifier; a first end of the fourth resistor is coupled to the inverting input end of the inverting amplifier, and a second end of the fourth resistor is coupled to an output end of the inverting amplifier; a non-inverting input end of the inverting amplifier is coupled to a ground signal input end, and an output end of the inverting amplifier is coupled to an output end of the sampling sub-circuit.

9. The display panel of claim 8, wherein The transimpedance amplification module further includes a third capacitor, a first end of the third capacitor is coupled to the first end of the second resistor, and a second end of the third capacitor is coupled to the second end of the second resistor; and / or The inverting amplification module further includes a fourth capacitor, a first end of the fourth capacitor is coupled to the first end of the fourth resistor, and a second end of the fourth capacitor is coupled to the second end of the fourth resistor. ​ 10. The display panel of any one of claims 2-9, wherein, the photosensitive sensor comprises three groups of photosensitive transistor structures and one group of reference transistor structures; the processing circuit comprises three first sub-circuits and one second sub-circuit; an output terminal of the first group of photosensitive transistor structures is coupled to a corresponding first first sub-circuit, the first first sub-circuit being configured to output a first photosensitive voltage signal according to a first photosensitive current output by the output terminal of the first group of photosensitive transistor structures; an output terminal of the second group of photosensitive transistor structures is coupled to a corresponding second first sub-circuit, the second first sub-circuit being configured to output a second photosensitive voltage signal according to a second photosensitive current output by the output terminal of the second group of photosensitive transistor structures; an output terminal of the third group of photosensitive transistor structures is coupled to a corresponding third first sub-circuit, the third first sub-circuit being configured to output a third photosensitive voltage signal according to a third photosensitive current output by the output terminal of the third group of photosensitive transistor structures; the display panel further comprises a red color filter shielding pattern, a green color filter shielding pattern, and a blue color filter shielding pattern, the red color filter shielding pattern covering the first group of photosensitive transistor structures, the green color filter shielding pattern covering the second group of photosensitive transistor structures, and the blue color filter shielding pattern covering the third group of photosensitive transistor structures; the first analog-to-digital conversion sub-circuit is coupled to the three first sub-circuits and the one second sub-circuit, respectively, and is configured to convert the first photosensitive voltage signal into a first digital photosensitive signal, convert the second photosensitive voltage signal into a second digital photosensitive signal, and convert the third photosensitive voltage signal into a third digital photosensitive signal; the first digital operation sub-circuit is configured to perform difference calculation on the first digital photosensitive signal and the digital reference signal to obtain a first digital difference signal, perform difference calculation on the second digital photosensitive signal and the digital reference signal to obtain a second digital difference signal, and perform difference calculation on the third digital photosensitive signal and the digital reference signal to obtain a third digital difference signal; the first algorithm module is configured to determine the ambient illuminance information according to the first digital difference signal, the second digital difference signal, or the third digital difference signal; the processing circuit further comprises a second algorithm module, the second algorithm module being coupled to the first digital operation sub-circuit, and the second algorithm module being configured to determine color temperature detection information according to the first digital difference signal, the second digital difference signal, and the third digital difference signal; the display panel further comprises a second control circuit, the second control circuit being coupled to the second algorithm module, and the second control circuit being configured to adjust a screen display color temperature of the display panel according to the color temperature detection information.

11. The display panel of claim 10, wherein, The display panel comprises a driving chip, and the first analog-digital conversion sub-circuit, the first digital operation sub-circuit, the first algorithm module and the second algorithm module are integrated in the driving chip; in each first sampling sub-circuit and each second sampling sub-circuit, except the sampling resistor, other parts are integrated in the driving chip.

12. The display panel of claim 1, wherein, The light-sensing transistor structure corresponds to the control transistor structure one by one, the output end of the corresponding light-sensing transistor structure is coupled with the output end of the control transistor structure to form a common output end, the common output end is used for outputting a difference current signal, and the difference current signal is obtained by differencing between the light-sensing current and the control current; The processing circuit comprises a conversion sub-circuit, a second analog-digital conversion sub-circuit and a first algorithm module; The conversion sub-circuit is connected between the common output end and the second analog-digital conversion sub-circuit, and is used for converting the difference current signal into a difference voltage signal; The second analog-digital conversion sub-circuit is used for converting the difference voltage signal into a digital difference signal; The first algorithm module is coupled with the second analog-digital conversion sub-circuit, and is used for determining the ambient illuminance information according to the digital difference signal.

13. The display panel of claim 12, wherein, The light-sensing sensor comprises three groups of light-sensing transistor structures and three groups of control transistor structures; The output end of the first group of light-sensing transistor structures is coupled with the output end of the corresponding first group of control transistor structures to form a first common output end, the first common output end is used for outputting a first difference current signal, and the first difference current signal is obtained by differencing between the first light-sensing current output by the output end of the first group of light-sensing transistor structures and the first control current output by the output end of the first group of control transistor structures; The output end of the second group of light-sensing transistor structures is coupled with the output end of the corresponding second group of control transistor structures to form a second common output end, the second common output end is used for outputting a second difference current signal, and the second difference current signal is obtained by differencing between the second light-sensing current output by the output end of the second group of light-sensing transistor structures and the second control current output by the output end of the second group of control transistor structures; The output end of the third group of light-sensing transistor structures is coupled with the output end of the corresponding third group of control transistor structures to form a third common output end, the third common output end is used for outputting a third difference current signal, and the third difference current signal is obtained by differencing between the third light-sensing current output by the output end of the third group of light-sensing transistor structures and the third control current output by the output end of the third group of control transistor structures; The display panel further comprises a red color film shielding pattern, a green color film shielding pattern and a blue color film shielding pattern, the red color film shielding pattern covers the first group of light-sensing transistor structures, the green color film shielding pattern covers the second group of light-sensing transistor structures, and the blue color film shielding pattern covers the third group of light-sensing transistor structures; The processing circuit comprises a first conversion sub-circuit, a second conversion sub-circuit, a third conversion sub-circuit and a second algorithm module; ​ The first conversion sub-circuit is connected between the first common output end and the second analog-digital conversion sub-circuit, and is configured to convert the first difference current signal into a first difference voltage signal; The second conversion sub-circuit is connected between the second common output end and the second analog-digital conversion sub-circuit, and is configured to convert the second difference current signal into a second difference voltage signal; The third conversion sub-circuit is connected between the third common output end and the second analog-digital conversion sub-circuit, and is configured to convert the third difference current signal into a third difference voltage signal; The second analog-digital conversion sub-circuit is configured to convert the first difference voltage signal into a first digital difference signal, convert the second difference voltage signal into a second digital difference signal, and convert the third difference voltage signal into a third digital difference signal; The first algorithm module is configured to determine the ambient illuminance information according to the first digital difference signal, the second digital difference signal, or the third digital difference signal; The second algorithm module is configured to determine color temperature detection information according to the first digital difference signal, the second digital difference signal, and the third digital difference signal; The display panel further comprises a second control circuit, the second control circuit is coupled with the second algorithm module, and the second control circuit is configured to adjust a screen display color temperature of the display panel according to the color temperature detection information.

14. The display panel of claim 12, wherein, The conversion sub-circuit comprises a conversion resistor, a first end of the conversion resistor is coupled with the common output end, and a second end of the conversion resistor is coupled with the second analog-digital conversion sub-circuit. The display panel comprises a conductive layer, and the conversion resistor is disposed in the same layer and of the same material as the conductive layer.

15. The display panel of claim 14, wherein, The conductive layer comprises a gate metal layer, a source-drain metal layer, and a transparent electrode layer which are sequentially stacked, the conversion resistor is disposed in the same layer and of the same material as the gate metal layer, or the conversion resistor is disposed in the same layer and of the same material as the source-drain metal layer, or the conversion resistor is disposed in the same layer and of the same material as the transparent electrode layer.

16. The display panel of claim 13, wherein, The display panel comprises a driving chip, and the second analog-digital conversion sub-circuit, the first algorithm module, and the second algorithm module are integrated in the driving chip.

17. The display panel of claim 1, wherein, The display panel further comprises a black matrix layer, a normal projection of a light-sensing surface of the light-sensing transistor structure on a substrate of the display panel does not overlap with a normal projection of the black matrix layer on the substrate, and a normal projection of a light-sensing surface of the contrast transistor structure on the substrate overlaps with the normal projection of the black matrix layer on the substrate.

18. The display panel of claim 1, wherein, The peripheral region comprises oppositely arranged upper and lower frame regions, and the display region is located between the upper and lower frame regions; the light-sensing sensor is located in the upper frame region, and a driving chip in the display panel is located in the lower frame region.

19. A display device comprising the display panel according to any one of claims 1-18.

20. A driving method of a display panel, applied to a display panel comprising the display panel according to any one of claims 1-18, and comprising: At least one set of light sensing transistor structures in the light sensing sensor senses ambient light and outputs a light sensing current; at least one set of reference transistor structures in the light sensing sensor is not affected by ambient light and outputs a reference current; The processing circuit determines ambient illumination information according to the light sensing current and the reference current; The first control circuit adjusts the screen display brightness of the display panel according to the ambient illumination information.

21. The driving method of the display panel according to claim 20, wherein The processing circuit includes at least one first sampling sub-circuit, at least one second sampling sub-circuit, a first analog-to-digital conversion sub-circuit, a first digital operation sub-circuit, and a first algorithm module; the first sampling sub-circuit is coupled to the output end of a corresponding set of light sensing transistor structures; the second sampling sub-circuit is coupled to the output end of a corresponding set of reference transistor structures; the first analog-to-digital conversion sub-circuit is coupled to the first sampling sub-circuit and the second sampling sub-circuit respectively; the first digital operation sub-circuit is coupled to the first analog-to-digital conversion sub-circuit; and the first algorithm module is coupled to the first digital operation sub-circuit; The driving method specifically includes: The first sampling sub-circuit outputs a light sensing voltage signal according to the light sensing current output by the set of light sensing transistor structures; The second sampling sub-circuit outputs a reference voltage signal according to the reference current output by the set of reference transistor structures; The first analog-to-digital conversion sub-circuit converts the light sensing voltage signal into a digital light sensing signal and converts the reference voltage signal into a digital reference signal; The first digital operation sub-circuit performs difference calculation on the digital light sensing signal and the digital reference signal to obtain a digital difference signal; The first algorithm module determines the ambient illumination information according to the digital difference signal.

22. The driving method of the display panel according to claim 21, wherein The light sensing sensor includes three sets of light sensing transistor structures and one set of reference transistor structures; and the processing circuit includes three first sampling sub-circuits and one second sampling sub-circuit; The output end of the first set of light sensing transistor structures is coupled to a corresponding first first sampling sub-circuit, the output end of the second set of light sensing transistor structures is coupled to a corresponding second first sampling sub-circuit, the output end of the third set of light sensing transistor structures is coupled to a corresponding third first sampling sub-circuit, the first analog-to-digital conversion sub-circuit is coupled to the three first sampling sub-circuits and the one second sampling sub-circuit respectively; the processing circuit further includes a second algorithm module, the second algorithm module is coupled to the first digital operation sub-circuit; the display panel further includes a second control circuit, the second control circuit is coupled to the second algorithm module; the display panel further includes a red color film shielding pattern, a green color film shielding pattern, and a blue color film shielding pattern, the red color film shielding pattern covers the first set of light sensing transistor structures, the green color film shielding pattern covers the second set of light sensing transistor structures, and the blue color film shielding pattern covers the third set of light sensing transistor structures; The driving method specifically includes: The first first sampling sub-circuit outputs a first light sensing voltage signal according to the first light sensing current output by the output end of the first set of light sensing transistor structures; The second first sub-circuit outputs a second light-sensing voltage signal according to a second light-sensing current output by an output end of a second set of light-sensing transistor structures; The third first sub-circuit outputs a third light-sensing voltage signal according to a third light-sensing current output by an output end of a third set of light-sensing transistor structures; The first analog-digital conversion sub-circuit converts the first light-sensing voltage signal into a first digital light-sensing signal, converts the second light-sensing voltage signal into a second digital light-sensing signal, and converts the third light-sensing voltage signal into a third digital light-sensing signal; The first digital operation sub-circuit performs difference calculation on the first digital light-sensing signal and the digital reference signal to obtain a first digital difference signal, performs difference calculation on the second digital light-sensing signal and the digital reference signal to obtain a second digital difference signal, and performs difference calculation on the third digital light-sensing signal and the digital reference signal to obtain a third digital difference signal; The first algorithm module determines the ambient illuminance information according to the first digital difference signal, the second digital difference signal, or the third digital difference signal; The second algorithm module determines color temperature detection information according to the first digital difference signal, the second digital difference signal, and the third digital difference signal; The second control circuit adjusts the screen display color temperature of the display panel according to the color temperature detection information. The light-sensing transistor structure and the reference transistor structure correspond to each other, and the output end of the corresponding light-sensing transistor structure is coupled with the output end of the corresponding reference transistor structure to form a common output end; the processing circuit includes a conversion sub-circuit, a second analog-digital conversion sub-circuit, and a first algorithm module; the conversion sub-circuit is connected between the common output end and the second analog-digital conversion sub-circuit, and the first algorithm module is coupled with the second analog-digital conversion sub-circuit; 23. The driving method of a display panel according to claim 20, wherein The common output end outputs a difference current signal, which is obtained by subtracting the light-sensing current from the reference current; The conversion sub-circuit converts the difference current signal into a difference voltage signal; The second analog-digital conversion sub-circuit converts the difference voltage signal into a digital difference signal; The first algorithm module determines the ambient illuminance information according to the digital difference signal. ​ 24. The driving method of the display panel according to claim 23, wherein The photosensitive sensor includes three groups of photosensitive transistor structures and three groups of control transistor structures; the output end of the first group of photosensitive transistor structures is coupled with the output end of the corresponding first group of control transistor structures to form a first common output end, the output end of the second group of photosensitive transistor structures is coupled with the output end of the corresponding second group of control transistor structures to form a second common output end, and the output end of the third group of photosensitive transistor structures is coupled with the output end of the corresponding third group of control transistor structures to form a third common output end; the display panel further includes a red color film shielding pattern, a green color film shielding pattern and a blue color film shielding pattern, the red color film shielding pattern covers the first group of photosensitive transistor structures, the green color film shielding pattern covers the second group of photosensitive transistor structures, and the blue color film shielding pattern covers the third group of photosensitive transistor structures; the processing circuit includes a first conversion sub-circuit, a second conversion sub-circuit, a third conversion sub-circuit and a second algorithm module; the first conversion sub-circuit is connected between the first common output end and the second analog-digital conversion sub-circuit, the second conversion sub-circuit is connected between the second common output end and the second analog-digital conversion sub-circuit, the third conversion sub-circuit is connected between the third common output end and the second analog-digital conversion sub-circuit, and the display panel further includes a second control circuit, which is coupled with the second algorithm module; The first common output end outputs a first difference current signal, which is obtained by subtracting a first control current output by the output end of the first group of control transistor structures from a first photosensitive current output by the output end of the first group of photosensitive transistor structures; The second common output end outputs a second difference current signal, which is obtained by subtracting a second control current output by the output end of the second group of control transistor structures from a second photosensitive current output by the output end of the second group of photosensitive transistor structures; The third common output end outputs a third difference current signal, which is obtained by subtracting a third control current output by the output end of the third group of control transistor structures from a third photosensitive current output by the output end of the third group of photosensitive transistor structures; The first conversion sub-circuit converts the first difference current signal into a first difference voltage signal; The second conversion sub-circuit converts the second difference current signal into a second difference voltage signal; The third conversion sub-circuit converts the third difference current signal into a third difference voltage signal; The second analog-digital conversion sub-circuit converts the first difference voltage signal into a first digital difference signal, converts the second difference voltage signal into a second digital difference signal, and converts the third difference voltage signal into a third digital difference signal; The first algorithm module determines the ambient illuminance information according to the first digital difference signal, the second digital difference signal or the third digital difference signal; The second algorithm module determines color temperature detection information according to the first digital difference signal, the second digital difference signal and the third digital difference signal. The second control circuit adjusts a screen display color temperature of the display panel according to the color temperature detection information.

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