Display panel, and display apparatus and sensing method therefor

Abstract

A display panel, and a display apparatus and a sensing method therefor. The display panel (100) comprises a display area (10), a peripheral area (201), a base substrate (801), a plurality of sensing units (40), and a plurality of filter portions (50). The peripheral area (201) is around the display area (10). The plurality of sensing units (40) are disposed on the base substrate (801) and are located in the peripheral area (201). Each sensing unit (40) comprises at least one photosensitive transistor. One filter portion (50) is located on the side of one sensing unit (40) that is away from the base substrate (801). The plurality of sensing units (40) comprise a plurality of white-light sensing units, wherein the filter portions (50) above the white-light sensing units are hollowed out or transparent, and at least two white-light sensing units are respectively disposed in the peripheral area (201) corresponding to different sides of the display panel (100).

Description

Display panel, display device and sensing method thereof Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display panel, a display device, and a sensing method thereof. Background Technology

[0002] The display product is equipped with a light sensor to detect ambient light. After detecting the ambient light, the ambient light brightness of the environment in which the display product is located can be obtained. Then, the screen brightness of the display product can be automatically adjusted according to the ambient light brightness to bring a better visual effect to the user. Summary of the Invention

[0003] On one hand, a display panel is provided, including a display area, a peripheral area, a substrate, a plurality of sensing units, and a plurality of light filters. The peripheral area is located around the display area. The plurality of sensing units are disposed on the substrate and located in the peripheral area. Each sensing unit includes at least one photosensitive transistor. One of the light filters is located on the side of a sensing unit away from the substrate. The plurality of sensing units includes a plurality of white light sensing units, the light filters above the white light sensing units are hollowed out or transparent, and at least two of the white light sensing units are respectively located in the peripheral areas corresponding to different sides of the display panel.

[0004] In one feasible embodiment, the peripheral area includes a first sub-area, a second sub-area, a third sub-area, and a fourth sub-area. The first sub-area and the second sub-area are respectively located on opposite sides of the display area in a first direction, and the third sub-area and the fourth sub-area are respectively located on opposite sides of the display area in a second direction. The first direction and the second direction are perpendicular to the thickness direction of the display panel and intersect each other.

[0005] The plurality of white light sensing units include a first white light sensing unit and a second white light sensing unit; the first white light sensing unit is located in the first sub-region, and the second white light sensing unit is located in the second sub-region; or, the first white light sensing unit is located in the third sub-region, and the second white light sensing unit is located in the fourth sub-region.

[0006] In one feasible embodiment, the plurality of sensing units further includes a reference sensing unit and a plurality of color temperature sensing units, wherein a light-blocking portion above the reference sensing unit blocks light; different color temperature sensing units allow different colors of light to pass through their light-blocking portions; the reference sensing unit and the plurality of color temperature sensing units are located in the first sub-region.

[0007] In one feasible embodiment, the system further includes a control signal line, a first input signal line, and a second input signal line; the control terminals of the photosensitive transistors of the reference sensing unit, the plurality of color temperature sensing units, the first white light sensing unit, and the second white light sensing unit are connected to the control signal line to receive control signals and to open or close in response to the control signals; the input terminals of the photosensitive transistors of the reference sensing unit and the plurality of color temperature sensing units are connected to the first input signal line to receive a first input signal; the input terminals of the photosensitive transistors of the first white light sensing unit and the second white light sensing unit are connected to the second input signal line to receive a second input signal; the phase difference between the first input signal and the second input signal is 180 degrees.

[0008] In one feasible embodiment, the control signal line includes a first control signal line and a second control signal line, the first control signal line and the second control signal line being configured to transmit the same control signal; the control terminals of the photosensitive transistors of the plurality of color temperature sensing units are connected to the first control signal line, the first control signal line extending in the third sub-region and extending to the second sub-region; the control terminals of the photosensitive transistors of the reference sensing unit are connected to the second control signal line, the second control signal line extending along the fourth sub-region and extending to the second sub-region; the control terminals of the photosensitive transistors of the first white light sensing unit are connected to one of the first control signal line and the second control signal line, and the control terminals of the photosensitive transistors of the second white light sensing unit are connected to the other of the first control signal line and the second control signal line.

[0009] In one feasible embodiment, the system further includes multiple output signal lines; the output terminal of a photosensitive transistor of one of the sensing units is connected to one of the output signal lines, and the output signal line is configured to transmit the sensing signal output by the photosensitive transistor.

[0010] In one feasible embodiment, the plurality of color temperature sensing units includes a first color temperature sensing unit, a second color temperature sensing unit, and a third color temperature sensing unit. The first color temperature sensing unit includes a plurality of first color temperature sensing sub-units, the second color temperature sensing unit includes a plurality of second color temperature sensing sub-units, and the third color temperature sensing unit includes a plurality of third color temperature sensing sub-units. The plurality of first color temperature sensing sub-units, the plurality of second color temperature sensing sub-units, and the plurality of third color temperature sensing sub-units are arranged alternately in the second direction.

[0011] In one feasible embodiment, the reference sensing unit includes a plurality of reference sensing sub-units; the plurality of first color temperature sensing sub-units, the plurality of second color temperature sensing sub-units, the plurality of third color temperature sensing sub-units and the plurality of reference sensing sub-units are arranged alternately in the second direction.

[0012] In one feasible embodiment, the first white light sensing unit is disposed in the first sub-region, and the first white light sensing unit includes a plurality of first white light sensing sub-units; the plurality of first color temperature sensing sub-units, the plurality of second color temperature sensing sub-units, the plurality of third color temperature sensing sub-units, the plurality of reference sensing sub-units and the plurality of first white light sensing sub-units are alternately arranged in the second direction.

[0013] In one feasible embodiment, the plurality of first color temperature sensing subunits include an equal number of photosensitive transistors, the plurality of second color temperature sensing subunits include an equal number of photosensitive transistors, and the plurality of third color temperature sensing subunits include an equal number of photosensitive transistors.

[0014] In one feasible embodiment, each sensing unit includes 75 photosensitive transistors; each sensing unit includes 5 sensing sub-units, and each sensing sub-unit includes 15 photosensitive transistors; the spacing between two adjacent sensing sub-units ranges from 10 micrometers to 100 micrometers.

[0015] In one feasible embodiment, it further includes: a light-shielding layer located in the first sub-region and on the side of the plurality of sensing units away from the substrate, the light-shielding layer being used to filter at least one of infrared light and ultraviolet light; the length of the light-shielding layer in the first direction is in the range of 0.2 mm to 0.7 mm, and the size in the second direction is in the range of 3.5 mm to 7 mm.

[0016] In one feasible embodiment, the plurality of sensing units include the same number of photosensitive transistors.

[0017] On the other hand, a display device is provided, including the display panel and driver chip described above. The driver chip is configured to provide control signals and input signals to a sensing unit in the display panel, and to receive sensing signals output by the sensing unit based on the control signals and the input signals.

[0018] In one feasible embodiment, the driver chip is disposed on the display panel, and the driver chip has a control pin, a first input pin, and a second input pin; the control pin is connected to the control signal line of the display panel, the first input pin is connected to the first input signal line of the display panel, and the second input pin is connected to the second input signal line of the display panel.

[0019] In one feasible embodiment, the system further includes a flexible circuit board having a plurality of first-type pins and a plurality of second-type pins, wherein the number of first-type pins is greater than the number of second-type pins; one first-type pin is connected to an output signal line of the display panel, and one second-type pin is connected to at least one first-type pin; the driver chip also has a plurality of receiving pins, the number of which is equal to the number of second-type pins, and one receiving pin is connected to one second-type pin; when one second-type pin is connected to at least two first-type pins, the flexible circuit board is configured to output sensing signals from at least two sensing units to the driver chip in a time-division manner via the second-type pins.

[0020] In one feasible embodiment, the output signal lines of the display panel include: a first output signal line to a sixth output signal line, which are respectively connected to a first color temperature sensing unit, a second color temperature sensing unit, a third color temperature sensing unit, a first white light sensing unit, a reference sensing unit, and a second white light sensing unit; the plurality of first-type pins include: a first pin to a sixth pin, which are respectively connected to the first output signal line to the sixth output signal line; the plurality of second-type pins include: a seventh pin to a tenth pin; wherein, the ninth pin is connected to the fifth pin and one of the first to fourth pins; the tenth pin is connected to the sixth pin and the other pin among the first to fourth pins; the seventh pin and the eighth pin are respectively connected to the remaining two pins among the first to fourth pins.

[0021] In one feasible embodiment, the flexible circuit board further includes a conversion circuit, wherein each of the second type pins is connected to one or more of the first type pins via the conversion circuit; the conversion circuit is configured to convert the sensing signal transmitted from the output signal line to the first type pin from a current signal to a voltage signal, and to transmit the converted sensing signal to the second type pin.

[0022] In one feasible embodiment, the driver chip further includes an analog-to-digital converter circuit, which includes a plurality of signal receiving terminals, the number of which is equal to the number of receiving pins, with one signal receiving terminal connected to one receiving pin; the analog-to-digital converter circuit is configured to convert the sensing signal received via the signal receiving terminals from an analog signal into a digital signal.

[0023] On the other hand, a sensing method for a display device is provided, applied to the aforementioned display device, the sensing method comprising: acquiring a first white light sensing signal sensed by a first white light sensing unit and a second white light sensing signal sensed by a second white light sensing unit; and obtaining the intensity of the current ambient light based on the first white light sensing signal and the second white light sensing signal.

[0024] In one feasible embodiment, when the difference between the first white light sensing signal and the second white light sensing signal is less than or equal to a preset threshold, the intensity of the current ambient light is obtained based on the average value of the first white light sensing signal and the second white light sensing signal; when the difference between the first white light sensing signal and the second white light sensing signal is greater than the preset threshold, the intensity of the current ambient light is obtained based on one of the first white light sensing signal and the second white light sensing signal.

[0025] In one feasible embodiment, the plurality of color temperature sensing signals include a first color temperature sensing signal, a second color temperature sensing signal, and a third color temperature sensing signal; the step of obtaining the intensity of the current ambient light based on one of the first white light sensing signal and the second white light sensing signal includes: obtaining a reference white light sensing signal based on the first color temperature sensing signal, the second color temperature sensing signal, and the third color temperature sensing signal; and obtaining the intensity of the current ambient light based on the one of the first white light sensing signal and the second white light sensing signal that is closer to the reference white light sensing signal.

[0026] In one feasible embodiment, obtaining the intensity of the current ambient light based on the first white light sensing signal and the second white light sensing signal includes: acquiring a reference sensing signal output by a reference sensing unit; acquiring a first compensation value and a second compensation value, wherein the first compensation value is the signal output by the reference sensing unit at 0 lux light intensity, and the second compensation value is the signal output by either the first white light sensing unit or the second white light sensing unit at 0 lux light intensity; obtaining a temperature correction coefficient based on the first white light sensing signal, the second white light sensing signal, the reference sensing signal, the first compensation value, and the second compensation value; and obtaining the intensity of the current ambient light based on the first white light sensing signal, the second white light sensing signal, and the temperature correction coefficient.

[0027] In one feasible embodiment, obtaining the intensity of the current ambient light based on the first white light sensing signal and the second white light sensing signal further includes: obtaining a backlight correction coefficient based on the reference sensing signal and the first compensation value; and obtaining the intensity of the current ambient light based on the first white light sensing signal, the second white light sensing signal, the temperature correction coefficient, and the backlight correction coefficient.

[0028] In one feasible embodiment, the sensing method further includes: acquiring multiple color temperature sensing signals sensed by multiple color temperature sensing units; and obtaining the color temperature of the current ambient light based on the multiple color temperature sensing signals, and at least one of the temperature correction coefficient and the backlight correction coefficient.

[0029] In one feasible embodiment, the sensing method further includes: determining the type of current ambient light based on the color temperature of the current ambient light; and determining the illuminance of the display device based on the intensity and type of the current ambient light.

[0030] On the other hand, a computer program is provided. When the computer program is executed on a computer, it causes the computer to perform the sensing method as described in any of the preceding claims. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0032] Figure 1 is a structural diagram of a display device according to some embodiments;

[0033] Figure 2 is a structural diagram of a display panel according to some embodiments;

[0034] Figure 3 is a partial structural diagram of a display device according to some embodiments;

[0035] Figure 4 is a cross-sectional view of the display panel in Figure 2 along the AA direction;

[0036] Figure 5 is a structural diagram of another display panel according to some embodiments;

[0037] Figure 6 is a circuit diagram of another display panel according to some embodiments;

[0038] Figure 7 is a structural diagram of a driver chip according to some embodiments;

[0039] Figure 8 is a circuit diagram of another display panel according to some embodiments;

[0040] Figure 9 is a circuit diagram of the analog-to-digital converter circuit in Figure 8;

[0041] Figure 10 is a timing diagram of the sampling control signal;

[0042] Figure 11 shows the waveforms of the first and second signals in Figure 9;

[0043] Figure 12 is a partial structural diagram of another display device according to some embodiments;

[0044] Figure 13 is a structural diagram of another display panel according to some embodiments;

[0045] Figure 14 is a partial structural diagram of another display device according to some embodiments;

[0046] Figure 15 is a partial structural diagram of another display device according to some embodiments;

[0047] Figure 16 is a partial structural diagram of another display panel according to some embodiments;

[0048] Figure 17 is a circuit diagram showing the arrangement of a sensing unit according to some embodiments;

[0049] Figure 18 is a structural diagram of the sensor unit arrangement shown in Figure 13;

[0050] Figure 19 is a structural diagram of the sensor unit arrangement shown in Figure 16;

[0051] Figure 20 is a partial structural diagram of another display panel according to some embodiments;

[0052] Figure 21 is a partial circuit diagram of another display panel according to some embodiments;

[0053] Figure 22 is a structural diagram of another display panel according to some embodiments;

[0054] Figure 23 is a partial structural diagram of another display panel according to some embodiments;

[0055] Figure 24 is a flowchart of a sensing method according to some implementations of a display device;

[0056] Figure 25 is a flowchart of another sensing method of a display device according to some embodiments;

[0057] Figure 26 is a flowchart of another sensing method of a display device according to some embodiments;

[0058] Figure 27 shows the illuminance-voltage curve of the sensing unit. Detailed Implementation

[0059] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0060] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0061] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0062] In describing some embodiments, the terms "coupled" and "connected," and their derivative expressions, may be used. The term "connected" should be interpreted broadly; for example, a "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection via an intermediate medium. The term "coupled," for example, indicates that two or more components have direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0063] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0064] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0065] As used herein, depending on the context, the term “if” may optionally be interpreted as meaning “when”, “in the event of”, “in response to determination”, or “in response to detection”. Similarly, depending on the context, the phrase “if it is determined that…” or “if [the stated condition or event] is detected” may optionally be interpreted as meaning “in the event of determination that…”, “in response to determination that…”, “when [the stated condition or event] is detected”, or “in response to the detection of [the stated condition or event]”.

[0066] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0067] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0068] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0069] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0070] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on another layer or substrate, or that there is an intermediate layer between the layer or element and another layer or substrate.

[0071] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0072] Figure 1 is a structural diagram of a display device according to some embodiments. As shown in Figure 1, an embodiment of this disclosure provides a display device 1000, which is a product with image display function. The display device 1000 includes a display panel 100 and a flexible circuit board 30, with the display panel 100 coupled to the flexible circuit board 30. Exemplarily, the display device 1000 can be any device that displays either moving (e.g., video) or fixed (e.g., still image) content, and whether it is text or an image.

[0073] For example, the display device 1000 can be any product or component with display functionality, such as a television, laptop computer, tablet computer, personal digital assistant (PDA), mobile phone, watch, clock, calculator, GPS receiver / navigator, camera, camera view display (e.g., a rearview camera display in a vehicle), wearable device, augmented reality (AR) device, virtual reality (VR) device, in-vehicle display, or flight display. For instance, the display device 1000 can be a mobile phone.

[0074] Regarding the type of light emission of the display device 1000, it can be a liquid crystal display (LCD), an organic light-emitting diode (OLED) display, or a quantum dot light-emitting diode (QLED) display. Regarding the form of the display device 1000, it can be a flat panel display, a curved display, or a foldable display, etc. Regarding the shape of the display device 1000, it can be rectangular or circular, etc.

[0075] The following describes some embodiments of the present disclosure using a rectangular and planar liquid crystal display device 1000 as an example. However, the implementation of the present disclosure is not limited to this, and any other display device can be considered as long as the same technical concept is applied.

[0076] Figure 2 is a structural diagram of a display panel according to some embodiments. The display panel 100 includes a display area 10, a non-display area 20, and a plurality of sensing units 40. The display area 10, the non-display area 20, and the sensing units 40 may be disposed on a substrate. The non-display area 20 includes a peripheral area 201 surrounding the display area 10 and a driving chip 202 located on one side of the display area 10. The plurality of sensing units 40 are located in the peripheral area 201 of the display panel 100. Exemplarily, the plurality of sensing units 40 and the driving chip 202 are located on opposite sides of the display area 10, for example, on the side of the display area 10 away from the driving chip 202. However, the embodiments of this disclosure do not limit the position of the plurality of sensing units 40, and the plurality of sensing units 40 may also be located between the display area 10 and the driving chip 202.

[0077] In some feasible embodiments, the display area 10 includes multiple scan lines and multiple data lines, which can intersect to define multiple sub-pixel regions. Each sub-pixel region can be provided with a pixel electrode, a common electrode, and a pixel driving circuit connected to the pixel electrode. The pixel driving circuit can include at least one thin-film transistor. For example, the drain of the thin-film transistor can be electrically connected to the pixel electrode, the source can be connected to the data line, and the gate can be connected to the scan line. The scan signal transmitted through the scan line controls the switching on and off of the thin-film transistor, and the pixel voltage transmitted on the data line is output to the pixel electrode through the pixel driving circuit. The common electrode is connected to a common signal line. An electric field is formed between the pixel electrode and the common electrode to drive the deflection of liquid crystal molecules, thereby realizing the display of a selected grayscale.

[0078] In some feasible embodiments, the display panel 100 further includes a gate driving circuit disposed in the peripheral region 201 of the display panel 100 and connected to the display area 10 via a scan line. Exemplarily, the display panel 100 includes two gate driving circuits disposed on opposite sides of the display area 10. However, this disclosure is not limited to this; for example, a gate driving circuit may be disposed only on one side of the display area 10.

[0079] Referring, in conjunction with Figures 2 and 3, Figure 3 is a partial structural diagram of a display device according to some embodiments. Sensing units 40 are located on the side of the display area 10 away from the driving chip 202. Taking a handheld display device as an example, multiple sensing units 40 are located in the photosensitive area 203 of the display device 1000. The photosensitive area 203 is part of the non-display area 20 and is located on the side of the display area 10 away from the driving chip 202. When the user uses the display product, the sensing units 40 are not obstructed, allowing them to receive ambient light for brightness detection, color temperature detection, etc. Furthermore, the distance of the sensing units 40 from the driving chip 202 avoids the risk of coupling between the signal lines used to transmit display signals into the display area 10 and the sensing units 40, thus preventing mutual interference between the sensing units 40 and the display area 10.

[0080] For example, the display area 10 can be rectangular, and the driver chip 202 can be rectangular. However, the embodiments of this disclosure do not limit the shape of the display area 10 and the driver chip 202.

[0081] Multiple sensing units 40 are connected to multiple pins of the driver chip 202 and multiple pins of the flexible circuit board 30 via multiple signal lines. Each sensing unit 40 includes at least one photosensitive transistor. The sensing unit 40 includes a first color temperature sensing unit 401, a second color temperature sensing unit 402, a third color temperature sensing unit 403, a first white light sensing unit 404, and a reference sensing unit 405. The multiple pins of the driver chip 202 include a first control pin G1, a second control pin G2, a first input pin S1, a first receiving pin AL1, a second receiving pin AL2, a third receiving pin AL3, a fourth receiving pin AL4, and a fifth receiving pin. The multiple signal lines include a first control signal G1 line 601, a second control signal G2 line 602, a first input signal S1 line 603, a first output signal line 605, a second output signal line 606, a third output signal line 607, a fourth output signal line 608, and a fifth output signal line 609.

[0082] The input terminals of the photosensitive transistors included in the first color temperature sensing unit 401, the second color temperature sensing unit 402, and the third color temperature sensing unit 403 are connected to the first input signal S1 line 603 to receive the first input signal S1 provided by the first input pin S1 of the driver chip 202. Their control terminals are connected to the first control signal G1 line 601 to receive the first control signal G1 provided by the first control pin G1 of the driver chip 202. The output terminal of the photosensitive transistor included in the first color temperature sensing unit 401 is connected to the first output signal line 605 to provide the sensing signal to… The first receiving pin AL1 of the driver chip 202 and the first output pin of the flexible circuit board 30 are connected. The output terminal of the photosensitive transistor included in the second color temperature sensing unit 402 is connected to the second output signal line 606 to provide the sensing signal to the second receiving pin AL2 of the driver chip 202 and the second output pin of the flexible circuit board 30. The output terminal of the photosensitive transistor included in the third color temperature sensing unit 403 is connected to the third output signal line 607 to provide the sensing signal to the third receiving pin AL3 of the driver chip 202 and the third output pin of the flexible circuit board 30.

[0083] The first white light sensing unit 404 includes a photosensitive transistor whose input terminal is connected to the first input signal S1 line 603 to receive the first input signal S1 provided by the first input pin S1 of the driver chip 202, and whose output terminal is connected to the fourth output signal line 608 to provide the sensing signal to the fourth receiving pin AL4 of the driver chip 202. The reference sensing unit 405 includes a photosensitive transistor whose input terminal is connected to the first input signal S1 line 603 to receive the first input signal S1 provided by the first input pin S1 of the driver chip 202, and whose output terminal is connected to the fifth output signal line 609 to provide the sensing signal to the fifth receiving pin of the driver chip 202. The first white light sensing unit 404 and the reference sensing unit 405 are also connected to the second control signal G2 line 602 to receive the second control signal G2 provided by the driver chip 202. For example, the first control signal G1 and the second control signal G2 are the same.

[0084] For example, the first control pin G1 of the driver chip 202 is connected to the first control pin G1 of the flexible circuit board 30, the second control pin G2 of the driver chip 202 is connected to the second control pin G2 of the flexible circuit board 30, the first input pin S1 of the driver chip 202 is connected to the first input pin S1 of the flexible circuit board 30, the first output pin of the driver chip 202 is connected to the first output pin of the flexible circuit board 30, the second output pin of the driver chip 202 is connected to the second output pin of the flexible circuit board 30, the third output pin of the driver chip 202 is connected to the third output pin of the flexible circuit board 30, the fourth output pin of the driver chip 202 is connected to the fourth output pin of the flexible circuit board 30, and the fifth output pin of the driver chip 202 is connected to the fifth output pin of the flexible circuit board 30.

[0085] The first color temperature sensing unit 401 may include a plurality of first color transistors, the second color temperature sensing unit 402 may include a plurality of second color transistors, the third color temperature sensing unit 403 may include a plurality of third color transistors, the first white light sensing unit 404 may include a plurality of first white light photosensitive transistors, and the reference sensing unit 405 may include a plurality of reference transistors. For example, the plurality of first color transistors in the first color temperature sensing unit 401 are connected in parallel, the plurality of second color transistors in the second color temperature sensing unit 402 are connected in parallel, the plurality of third color transistors in the third color temperature sensing unit 403 are connected in parallel, the plurality of brightness sensing transistors in the first white light sensing unit 404 are connected in parallel, and the reference transistors in the reference sensing unit 405 are connected in parallel. The number of first color transistors, second color transistors, third color transistors, first white light photosensitive transistors, and reference transistors may be the same.

[0086] In some feasible embodiments, the plurality of first color transistors included in the first color temperature sensing unit 401 can be arranged sequentially in a horizontal direction, for example, in a row. The plurality of second color transistors included in the second color temperature sensing unit 402 can be arranged sequentially in a horizontal direction, for example, in a row. The plurality of third color transistors included in the third color temperature sensing unit 403 can be arranged sequentially in a horizontal direction, for example, in a row. The plurality of brightness sensing transistors included in the first white light sensing unit 404 can be arranged sequentially in a horizontal direction. The plurality of reference transistors included in the reference sensing unit 405 can be arranged sequentially in a horizontal direction, for example, in a row. However, the embodiments of this disclosure are not limited in this respect; for example, the plurality of first color transistors can be arranged in multiple rows and columns. In this embodiment, the ambient light change is fed back by the sensing results of the five sets of sensing units 40, thereby realizing brightness detection and color temperature detection, etc.

[0087] Referring to Figures 2 and 4, Figure 4 is a cross-sectional view of the display panel in Figure 2 along the AA direction. As shown in Figure 4, the display panel 100 includes a substrate 801, a plurality of sensing units 40, a plurality of light filters 50, and a cover plate 802. The plurality of sensing units 40 are located on one side of the substrate 801, the plurality of light filters 50 are located on the side of the plurality of sensing units 40 away from the substrate 801, and the cover plate 802 is located on the side of the plurality of light filters 50 away from the substrate 801. Each sensing unit 40 includes at least one photosensitive transistor, which is located on one side of the substrate 801, and the light filter 50 is located on the side of the photosensitive transistor away from the substrate 801.

[0088] The light filtering section 50 includes a first light filtering section 501, a second light filtering section 502, a third light filtering section 503, a first light transmitting section 504, and a light blocking section 505. The orthographic projection of the first light filtering section 501 on the substrate 801 includes the orthographic projection of the first color temperature sensing unit 401 on the substrate 801; the orthographic projection of the second light filtering section 502 on the substrate 801 includes the orthographic projection of the second color temperature sensing unit 402 on the substrate 801; the orthographic projection of the third light filtering section 503 on the substrate 801 includes the orthographic projection of the third color temperature sensing unit 403 on the substrate 801; the orthographic projection of the first light transmitting section 504 on the substrate 801 includes the orthographic projection of the first white light sensing unit 404 on the substrate 801; and the orthographic projection of the light blocking section 505 on the substrate 801 includes the orthographic projection of the reference sensing unit 405 on the substrate 801. For example, the first filter 501 can be a red filter, the second filter 502 can be a green filter, and the third filter 503 can be a blue filter. In some feasible embodiments, the first filter 501 can be a green filter, the second filter 502 can be a red filter, and the third filter 503 can be a blue filter; however, this disclosure does not limit the scope of the embodiments.

[0089] In some feasible embodiments, the light-filtering section 50 may include a color filter (CF) and a black matrix (BM). The first light-filtering section 501, the second light-filtering section 502, and the second light-filtering section 502 are, for example, color filters, to allow selected color light to illuminate the corresponding sensing unit 40. The first light-transmitting section 504 is, for example, a transparent optical adhesive 803, to allow ambient light to illuminate the first white light sensing unit 404. The light-shielding section 505 is, for example, a black matrix, to block ambient light. Exemplarily, before forming the first light-transmitting section 504, the color filter located on the side of the first white light sensing unit 404 away from the substrate 801 is hollowed out.

[0090] In some feasible embodiments, after the color filter is hollowed out, the hollowed-out area is not filled with optical adhesive 803, forming a hollowed-out filter part.

[0091] The first filter 501, the second filter 502, the third filter 503, the first light-transmitting part 504, and the light-shielding part 505 also include a black matrix BM for defining pixel boundaries. When ambient light is incident, the black matrix BM can prevent ambient light crosstalk that illuminates different sensing units. The black matrix and / or the ink located on one side of the cover plate 802 will also block part of the ambient light incident light path. At certain angles, the sensing unit 40 receives a sudden drop in ambient light illuminance, which causes a sudden drop in the sensing signal generated by the sensing unit 40, thereby causing excessive errors in brightness detection and color temperature detection.

[0092] The display panel will be described with reference to Figures 5 and 6. Figure 5 is a structural diagram of another display panel according to some embodiments, and Figure 6 is a circuit diagram of another display panel according to some embodiments. The display panel 100 includes a display area 10, a non-display area 20, and a plurality of sensing units 40. The non-display area 20 includes a peripheral area 201 located around the display area 10. The peripheral area 201 includes a first sub-area 204, a second sub-area 205, a third sub-area 206, and a fourth sub-area 207. The first sub-area 204 and the second sub-area 205 are located on opposite sides of the display area 10 in a first direction x, and the third sub-area 206 and the fourth sub-area 207 are located on opposite sides of the display area 10 in a second direction y. The dashed boxes in the figures are only schematic representations of the relative positions of each sub-area to the display area 10. The embodiments disclosed herein do not limit the size, shape, etc. of each sub-area.

[0093] For example, the first direction x and the second direction y are perpendicular to the thickness direction of the display panel 100, and the first direction x and the second direction y intersect each other.

[0094] Each sensing unit 40 includes at least one photosensitive transistor. The sensing unit 40 includes a first color temperature sensing unit 401, a second color temperature sensing unit 402, a third color temperature sensing unit 403, a first white light sensing unit 404, a reference sensing unit 405, and a second white light sensing unit 406. Referring to Figures 5 and 12, Figure 12 is a partial structural diagram of another display device according to some embodiments. The first color temperature sensing unit 401, the second color temperature sensing unit 402, the third color temperature sensing unit 403, and the reference sensing unit 405 are located in a first sub-region 204, the first white light sensing unit 404 is located in a fourth sub-region 207, and the second white light sensing unit 406 is located in a third sub-region 206.

[0095] The exemplary first color temperature sensing unit 401, second color temperature sensing unit 402, third color temperature sensing unit 403, first white light sensing unit 404 and reference sensing unit 405 have a size of 115.53 micrometers in the first direction x and 9420.5 micrometers in the second direction y.

[0096] In some feasible embodiments, the distance between the first white light sensing unit 404 and the second white light sensing unit 406 and the display area 10 is 0.1 mm. The ink located in the third sub-area 206 and the fourth sub-area 207 is offset to the left and right by at least 0.13 mm, thereby effectively avoiding the situation where the first white light sensing unit 404 or the second white light sensing unit 406 is blocked due to excessive ink shrinkage. The ink is located, for example, on the side of the sensing unit 40 away from the substrate.

[0097] When the first white light sensing unit 404 and the second white light sensing unit 406 are located on opposite sides of the display area 10, the ambient light they receive at different angles is different, and they can also detect whether there are different angles of ambient light.

[0098] The control terminals of the photosensitive transistors of the first color temperature sensing unit 401, the second color temperature sensing unit 402, and the third color temperature sensing unit 403 are connected to the first control signal G1 line 601 to receive the first control signal G1 provided by the first control pin G1 of the driver chip 202. Their input terminals are connected to the first input signal S1 line 603 to receive the first output signal provided by the first output pin of the driver chip 202. The output terminals are connected to the first output signal line 605, the second output signal line 606, and the third output signal line 607, respectively. The first output signal line 605, the second output signal line 606, and the third output signal line 607 are configured to provide the first color temperature sensing signal, the second color temperature sensing signal, and the third color temperature sensing signal output by the photosensitive transistors of the first color temperature sensing unit 401, the second color temperature sensing unit 402, and the third color temperature sensing unit 403 to the first pin D1, the second pin D2, and the third pin D3 of the flexible circuit board 30, respectively. The control terminal of the phototransistor of the first white light sensing unit 404 is connected to the second control signal G2 line 602 to receive the second control signal G2 provided by the second control pin G2 of the driver chip 202. The input terminal is connected to the second input signal S2 line 604 to receive the second input signal S2 provided by the second input pin S2 of the driver chip 202. The output terminal is connected to the fourth output signal line 608, which is configured to provide the first white light sensing signal output by the phototransistor of the first white light sensing unit 404 to the fourth pin D4 of the flexible circuit board 30. The control terminal of the phototransistor of the reference sensing unit 405 is connected to the second control signal G2 line 602 to receive the second control signal G2 provided by the second control pin G2 of the driver chip 202. The input terminal is connected to the first input signal S1 line 603 to receive the first input signal S1 provided by the first input pin S1 of the driver chip 202. The output terminal is connected to the fifth output signal line 609, which is configured to provide the reference sensing signal output by the phototransistor of the reference sensing unit 405 to the fifth pin D5 of the flexible circuit board 30. The control terminal of the phototransistor of the second white light sensing unit 406 is connected to the first control signal G1 line 601 to receive the first control signal G1 provided by the first control pin G1 of the driver chip 202. The input terminal is connected to the second input signal S2 line 604 to receive the second input signal S2 provided by the second input pin S2 of the driver chip 202. The output terminal is connected to the sixth output signal line 610. The sixth output signal line 610 is configured to provide the second white light sensing signal output by the phototransistor of the second white light sensing unit 406 to the sixth pin D6 of the flexible circuit board 30.

[0099] The driving chip 202 may or may not be disposed on the display panel 100; this embodiment does not limit this. The first control signal G1 and the second control signal G2 are the same, and they are driven periodically, which can effectively improve the drift problem of the photosensitive transistor in the sensing unit 40. The phase difference between the first input signal S1 and the second input signal S2 is 180°. For example, the frequency of the first input signal S1 and the second input signal S2 is 10Hz, the duty cycle is 40% of the sensing unit, and the phase difference is 180°.

[0100] The first control signal line G1 601 extends, for example, in the third sub-region 206 and to the second sub-region 205. The second control signal line G2 602 extends, for example, in the fourth sub-region 207 and to the second sub-region 205. This embodiment does not limit the connection relationship between each sensing unit 40 and the first control pin G1 and the second control pin G2 of the driver chip 202. Depending on the relative position of each sensing unit 40 and the display area 10, the sensing unit 40 can be connected to the one with the shorter wiring distance between the first control pin G1 and the second control pin G2.

[0101] In some feasible embodiments, the aspect ratio of the transistors included in a single sensing unit 40 is between 500 / 5 and 3000 / 3. For example, the aspect ratio of a single sensing unit 40 can be 500 / 3, 500 / 4, 500 / 5, 1500 / 3, 1500 / 4, 1500 / 5, 3000 / 3, 3000 / 4, or 3000 / 5, etc.

[0102] The flexible circuit board 30 includes multiple first-type pins and multiple second-type pins, with the number of first-type pins greater than the number of second-type pins. Each first-type pin is connected to one output signal line of the display panel 100, and each second-type pin is connected to at least one first-type pin. The driver chip 202 includes multiple receiving pins, the number of which is the same as the number of second-type pins of the flexible circuit board 30. The first-type pins of the flexible circuit board 30 include first pins D1 to sixth pins D6, and the second-type pins of the flexible circuit board 30 include seventh pins D7 to tenth pins D10.

[0103] The receiving pins of the driver chip 202 include a first receiving pin AL1 to a fourth receiving pin AL4. For example, the first receiving pin AL1 of the driver chip 202 is connected to the seventh pin D7 of the flexible circuit board 30, the second receiving pin AL2 of the driver chip 202 is connected to the eighth pin D8 of the flexible circuit board 30, the third receiving pin of the driver chip 202 is connected to the ninth pin D9 of the flexible circuit board 30, and the fourth receiving pin AL4 of the driver chip 202 is connected to the tenth pin D10 of the flexible circuit board 30.

[0104] Referring to Figure 6, the flexible circuit board 30 includes a conversion circuit 301. Each second type pin is connected to one or more first type pins through the conversion circuit 301. The conversion circuit 301 is configured to convert the sensing signal transmitted from the output signal line to the first type pin from a current signal to a voltage signal, and transmit the converted sensing signal to the second type pin.

[0105] An exemplary conversion circuit 301 includes resistors R1 to R10. Resistors R1 and R2 are connected in series between the first pin D1 and ground; resistors R3 and R4 are connected in series between the second pin D2 and ground; resistors R5 and R6 are connected in series between the third pin D3 and ground; and resistors R7 and R8 are connected in series between the fifth pin D5 and ground. Resistor R9 is connected to the sixth pin D6, between the intermediate node of resistors R7 and R8. Resistor R10 is connected to the fourth pin D4, between the intermediate node of resistors R5 and R6. The resistance values ​​of resistors R2, R4, R6, and R8 range from 10MΩ to 100MΩ. For example, the resistance of resistor R2 can be 10MΩ, 20MΩ, 30MΩ, 40MΩ, 50MΩ, 60MΩ, 70MΩ, 80MΩ, 90MΩ, or 100MΩ.

[0106] The intermediate node of resistors R1 and R2 is connected to pin 7, D7, to convert the first color temperature sensing signal output by the photosensitive transistor of the first color temperature sensing unit 401 from a current signal to a voltage signal, and to provide the converted first color temperature sensing signal to pin 7, D7, thereby providing the first color temperature sensing signal to the first receiving pin AL1 of the driver chip 202. The intermediate node of resistors R3 and R4 is connected to pin 8, D8, to convert the second color temperature sensing signal output by the photosensitive transistor of the second color temperature sensing unit 402 from a current signal to a voltage signal, and to provide the converted second color temperature sensing signal to pin 8, D8, thereby providing the second color temperature sensing signal to the second receiving pin AL2 of the driver chip 202.

[0107] The intermediate node of resistors R5 and R6 is connected to the tenth pin D10 to convert the third color temperature sensing signal output by the photosensitive transistor of the third color temperature sensing unit 403 from a current signal to a voltage signal, and to provide the converted third color temperature sensing signal to the tenth pin D10. In addition, resistor R10 is also connected to the tenth pin D10 to convert the first white light sensing signal output by the photosensitive transistor of the first white light sensing unit 404 from a current signal to a voltage signal, and to provide the converted first white light sensing signal to the tenth pin D10. As mentioned above, the first input signal S1 received by the input terminal of the photosensitive transistor of the third color temperature sensing unit 403 is 180° out of phase with the second input signal S2 received by the input terminal of the photosensitive transistor of the first white light sensing unit 404. Therefore, the flexible circuit board 30 can provide the third color temperature sensing signal provided by the third pin D3 and the first white light sensing signal provided by the fourth pin D4 to the tenth pin D10 in a time-division manner, thereby providing one of the third color temperature sensing signal or the first white light sensing signal to the fourth receiving pin AL4 of the driver chip 202 in a time-division manner.

[0108] The intermediate node of resistors R7 and R8 is connected to pin 9, D9, to convert the reference signal output by the phototransistor of the reference sensing unit 405 from a current signal to a voltage signal, and to provide the converted reference sensing signal to pin 9, D9. Resistor R9 is also connected to pin 9, D9, to convert the second white light sensing signal output by the phototransistor of the second white light sensing unit 406 from a current signal to a voltage signal, and to provide the converted second white light sensing signal to pin 10, D10. As mentioned above, the first input signal S1 received at the input terminal of the phototransistor of the reference sensing unit 405 is 180° out of phase with the second input signal S2 received at the input terminal of the phototransistor of the second white light sensing unit 406. Therefore, the flexible circuit board 30 can provide the third color temperature sensing signal provided by pin 5, D5, and the second white light sensing signal provided by pin 6, D6, to pin 9, thereby providing the reference sensing signal or the second white light sensing signal to the third receiving pin AL3 of the driver chip 202 in a time-division multiplexing manner.

[0109] In some feasible embodiments, resistor R9 can be connected between the sixth pin D6 and the intermediate node between resistors R3 and R4, thereby achieving time-division multiplexing of the second color temperature sensing signal output by the photosensitive transistor of the second color temperature sensing unit 402 and the second white light sensing signal output by the photosensitive transistor of the second white light sensing unit 406. Resistor R10 can be connected between the fourth pin D4 and the intermediate node between resistors R1 and R2, thereby achieving time-division multiplexing of the first color temperature sensing signal output by the photosensitive transistor of the first color temperature sensing unit 401 and the first white light sensing signal output by the photosensitive transistor of the first white light sensing unit 404.

[0110] In the display panel 100, the first color temperature sensing unit 401, the second color temperature sensing unit 402, the third color temperature sensing unit 403, and the reference sensing unit 405 receive a first input signal S1, and the first white light sensing unit 404 and the second white light sensing unit 406 receive a second input signal S2. The first input signal S1 and the second input signal S2 have a phase difference of 180°, enabling time-division multiplexing of the output of one of the first color temperature sensing units 401, 402, 403, and 405 with the output of the first white light sensing unit 404. Furthermore, it is also possible to time-division multiplex the output of the other of the first color temperature sensing units 401, 402, 403, and 405 with the output of the second white light sensing unit 406. The flexible circuit board 30, from pin 7 (D7) to pin 10 (D10), can output up to eight sets of sensing signals.

[0111] In some feasible embodiments, the driver chip 202 further includes an analog-to-digital converter circuit 70 and a control circuit 901. As shown in Figures 7 and 8, Figure 7 is a structural diagram of a driver chip according to some embodiments, and Figure 8 is a circuit diagram of another display panel according to some embodiments. The analog-to-digital converter circuit 70 includes a plurality of signal receiving terminals, one of which is connected to a receiving pin of the driver chip 202. The analog-to-digital converter circuit 70 is configured to convert sensing signals received via the signal receiving terminals from analog signals into digital signals. The control circuit 901 is configured to provide a first input signal S1, a second input signal S2, and a control signal G, wherein the control signal G includes at least one of a first control signal G1 and a second control signal G2.

[0112] The analog-to-digital converter (ADC) circuit 70 includes a first signal receiving terminal E1, a second signal receiving terminal E2, a third signal receiving terminal E3, and a fourth signal receiving terminal E4, which are respectively connected to the first receiving pin AL1, the second receiving pin AL2, the third receiving pin AL3, and the fourth receiving pin AL4 of the driver chip 202. The ADC circuit 70 also includes sample-and-hold units 710, 720, 730, 740, 705, and 706. The input terminal of the sample-and-hold unit 710 is connected to the first signal receiving terminal E1 of the ADC circuit 70 to receive a first color temperature sensing signal. The sample-and-hold unit 710 is configured to sample and hold the first color temperature sensing signal and provide it to the ADC unit 705. The input terminal of the sample-and-hold unit 720 is connected to the second signal receiving terminal E2 of the ADC circuit 70 to receive a second color temperature sensing signal. The sample-and-hold unit 720 is configured to sample and hold the second color temperature sensing signal and provide it to the ADC unit 705. The analog-to-digital conversion unit 705, under the control of the control circuit 901, converts the first color temperature sensing signal and / or the second color temperature sensing signal from analog signals into digital signals.

[0113] The input terminal of the sample-and-hold unit 730 is connected to the third signal receiving terminal E3 of the analog-to-digital converter circuit 70 to receive a reference sensing signal or a second white light sensing signal. The sample-and-hold unit 730 is configured to sample and hold one of the reference sensing signal or the second white light sensing signal and provide it to the analog-to-digital converter unit 706. Under the control of the control circuit 901, the analog-to-digital converter unit 706 converts the reference sensing signal or the second white light sensing signal from an analog signal to a digital signal. The input terminal of the sample-and-hold unit 740 is connected to the fourth signal receiving terminal E4 of the analog-to-digital converter circuit 70 to receive a third color temperature sensing signal or a first white light sensing signal. The sample-and-hold unit 740 is configured to sample and hold one of the third color temperature sensing signal or the first white light sensing signal and provide it to the analog-to-digital converter unit 706. Under the control of the control circuit 901, the analog-to-digital converter unit 706 converts the third color temperature sensing signal or the first white light sensing signal from an analog signal to a digital signal.

[0114] In some feasible embodiments, the sample-and-hold circuit can be an amplifier connected to a voltage follower. For example, sample-and-hold unit 710 includes amplifier 701, with a first input terminal of amplifier 701 serving as the input terminal of sample-and-hold unit 710, and an output terminal of amplifier 701 connected to a second input terminal of amplifier 701. Amplifier 702 in sample-and-hold unit 720, amplifier 703 in sample-and-hold unit 730, and amplifier 704 in sample-and-hold unit 740 are similar to sample-and-hold unit 710 and will not be described further.

[0115] Because the sensing signals output by the first color temperature sensing unit 401, the second color temperature sensing unit 402, the third color temperature sensing unit 403, and the reference sensing unit 405 can be time-division multiplexed with the sensing signals output by the first white light sensing unit 404 and the second white light sensing unit 406, there is no need to add a sample-and-hold unit when adding sensing unit 40. The process is simple, the adjustment to the existing production line is small, and it is beneficial to reduce production costs.

[0116] Referring to Figure 8, after receiving the various sensing signals converted into digital signals, the control circuit 901 provides them to the PC for subsequent brightness detection and / or color temperature detection.

[0117] Referring to Figure 9, which is a circuit diagram of the analog-to-digital converter (ADC) circuit in Figure 8, the ADC circuit 70 includes a sampling switch P2, a sampling resistor Rsh, an amplifier 701, and an ADC unit 705. For ease of description, other circuit components of the ADC circuit 70 are not shown in Figure 9. The first terminal of the sampling switch is connected to the signal receiving terminal of the ADC circuit 70 to receive the sensing signal provided by the sensing unit 40. The second terminal is connected to the first terminal of the sampling resistor Rsh, and the signal at the first terminal of the sampling resistor Rsh is, for example, a first signal VX1. The second terminal of the sampling resistor Rsh is grounded. The first input terminal of the amplifier 701 is connected to the first terminal of the sampling resistor Rsh, and the second input terminal is connected to the output terminal of the amplifier 701. The output terminal of the amplifier 701 is connected to the input terminal of the ADC unit 705, which is configured to convert the output signal of the amplifier 701 into a second signal VX2.

[0118] For example, the sampling resistor Rsh has a resistance of 10kΩ.

[0119] Referring to Figures 10 and 11, the operation of the analog-to-digital converter circuit shown in Figure 9 will be explained. Figure 10 is a timing diagram of the sampling control signal, and Figure 11 is a waveform diagram of the first and second signals in Figure 9. When the first input signal S1 or the second input signal S2 is in the first state, the sampling control signal P2 switches between the first and second states to convert the sensed signal received by the signal receiving end of the analog-to-digital converter circuit 70 into the first signal VX1. The amplifier 701 performs voltage following on VX1 to maintain the voltage at the output end of the amplifier 701. The analog-to-digital converter unit 705 generates the corresponding second signal VX2 based on the maintained VX1. The second signal VX2 is a digital signal.

[0120] In some feasible embodiments, refer to Figures 13, 14, and 15. Figure 13 is a structural diagram of another display panel according to some embodiments, Figure 14 is a partial structural diagram of another display device according to some embodiments, and Figure 15 is a partial structural diagram of another display device according to some embodiments. The display panel 100 shown in Figure 13 is basically the same as the display panel 100 shown in Figure 5 except for the positions of the first white light sensing unit 404 and the second white light sensing unit 406. For ease of description, the display panel 100 shown in Figure 13 only shows the display area 10, the first color temperature sensing unit 401, the second color temperature sensing unit 402, the third color temperature sensing unit 403, the first white light sensing unit 404, the reference sensing unit 405, and the second white light sensing unit 406; the remaining structures or connecting lines are not shown. Figure 14 is a partial enlarged view of the first sub-area 204 of the display panel 100 in Figure 13, and Figure 15 is a partial enlarged view of the second sub-area 205 of the display panel 100 in Figure 13. As can be seen from the figures, the first color temperature sensing unit 401, the second color temperature sensing unit 402, the third color temperature sensing unit 403, the first white light sensing unit 404, and the reference sensing unit 405 are located in the first sub-area 204, and the second white light sensing unit 406 is located in the second sub-area 205. For example, the second white light sensing unit 406 can be located at the lower right corner of the display area 10 of the display device 1000, or at the lower left corner of the display area 10 of the display device 1000; this embodiment does not limit the location. For example, the distance between the second white light sensing unit 406 and the lower edge of the display area 10 is 0.2 mm, and the ink clearance is at least 0.13 mm. When ambient light shines on the display panel 100, the second white light sensing unit 406 can be used to sense the light to achieve brightness detection, color temperature detection, etc.

[0121] In some feasible embodiments, the number of photosensitive transistors included in the first color temperature sensing unit 401, the second color temperature sensing unit 402, the third color temperature sensing unit 403, the first white light sensing unit 404, the reference sensing unit 405, and the second white light sensing unit 406 are the same, for example, all 75.

[0122] When each sensing unit 40 includes 75 photosensitive transistors, the distance between any two adjacent sensing units 40 is greater than or equal to 1 mm. When the temperature changes, the temperature of the area where different sensing units 40 are located is different, and the photosensitive transistors of different sensing units 40 are affected by the temperature differently, which adversely affects the sensing signal output by the sensing unit 40. Moreover, due to the limitations of the photosensitive transistor manufacturing process, the parameters of the photosensitive transistors in different areas are slightly different. When the photosensitive transistors of each sensing unit 40 are concentrated together as shown in Figure 13, the error of each sensing unit 40 is amplified. Therefore, at least some sensing units 40 are divided into multiple sensing sub-units, and the sensing sub-units of different sensing units 40 are arranged alternately, so that the sensing sub-units of each sensing unit 40 are evenly distributed in different areas. That is, the transistors of each sensing unit 40 are alternately distributed in different areas, reducing the impact of temperature changes and manufacturing process on the photosensitive transistors and improving the accuracy of brightness detection and color temperature detection. In addition, the alternating arrangement of multiple sensing sub-units can also avoid the light source judgment error caused by different light source illumination angles.

[0123] In some feasible embodiments, as shown in FIG16, FIG16 is a partial structural diagram of another display panel according to some embodiments. The arrangement of the sensing unit 40 is described in conjunction with FIG13 and FIG16. The first color temperature sensing unit 401, the second color temperature sensing unit 402, the third color temperature sensing unit 403, the first white light sensing unit 404 and the reference sensing unit 405 are located in the first sub-area 204 of the display panel 100. The first color temperature sensing unit 401 includes multiple first color temperature sensing subunits 410, the second color temperature sensing unit 402 includes multiple second color temperature sensing subunits 420, and the third color temperature sensing unit 403 includes multiple third color temperature sensing subunits 430. For example, the number of the first color temperature sensing subunits 410, the second color temperature sensing subunits 420, and the third color temperature sensing subunits 430 are all 5. One first color temperature sensing subunit 410, one second color temperature sensing subunit 420, and one third color temperature sensing subunit 430 are arranged as a group in the second direction y. In Figure 16, there are a total of five groups of first color temperature sensing subunits 410, second color temperature sensing subunits 420, and third color temperature sensing subunits 430 arranged alternately in the second direction y.

[0124] Figure 17 is a circuit diagram of a sensing unit according to some embodiments. As shown in Figure 17, the control terminals of the photosensitive transistors of multiple color temperature sensing units, the photosensitive transistor of the first white light sensing unit 404, and the photosensitive transistor of the reference sensing unit 405 receive a first control signal G1, and the input terminals receive an input signal S, which can be either the first input signal S1 or the second input signal S2. The control terminals of the photosensitive transistors of the sensing unit 40 receive signals from the multiple color temperature sensing sub-units arranged alternately, and the output terminals of the photosensitive transistors of each color temperature sensing sub-unit are still connected to the corresponding first output signal line, second output signal line, and third output signal line. The output terminals of the multiple photosensitive transistors of the first white light sensing unit 404 are connected in parallel with the multiple photosensitive transistors of the reference sensing unit 405.

[0125] In some feasible embodiments, each sensing sub-unit has the same number of transistors, 15 in total. For example, within each group of sensing sub-units, the spacing between two adjacent sensing sub-units is between 10 micrometers and 100 micrometers; the spacing between two adjacent groups of sensing sub-units is between 30 micrometers and 1 millimeter.

[0126] In some feasible embodiments, refer to Figures 18 and 19. Figure 18 is a structural diagram of the sensing unit arrangement shown in Figure 13, and Figure 19 is a structural diagram of the sensing unit arrangement shown in Figure 16. In Figures 18 and 19, the active layers of multiple photosensitive transistors 902 are connected in parallel through connecting signal lines 903, thereby realizing the parallel connection of photosensitive transistors 902 in each sensing unit 40. As can be seen from Figures 18 and 19, dividing the sensing unit 40 into multiple sensing sub-units and arranging the multiple sensing sub-units alternately can increase the density of photosensitive transistors 902 to a certain extent, reduce the impact of temperature changes and manufacturing processes on photosensitive transistors, and improve the accuracy of sensing signals.

[0127] In some feasible embodiments, referring to Figures 20 and 21, Figure 20 is a partial structural diagram of another display panel according to some embodiments, and Figure 21 is a partial circuit diagram of another display panel according to some embodiments. A first color temperature sensing unit 401, a second color temperature sensing unit 402, a third color temperature sensing unit 403, a first white light sensing unit 404, and a reference sensing unit 405 are located in a first sub-region 204 of the display panel 100. The first color temperature sensing unit 401 includes a plurality of first color temperature sensing sub-units 410, the second color temperature sensing unit 402 includes a plurality of second color temperature sensing sub-units 420, the third color temperature sensing unit 403 includes a plurality of third color temperature sensing sub-units 430, the first white light sensing unit 404 includes a plurality of first white light sensing sub-units 440, and the reference sensing unit 405 includes a plurality of 150. For example, the first color temperature sensing sub-units 410, 420, 430, and 440... The number of reference sensing subunits 450 is 5. One first color temperature sensing subunit 410, one second color temperature sensing subunit 420, one third color temperature sensing subunit 430, one reference sensing subunit 450 and one first white light sensing subunit 440 are arranged in a group in the second direction y. In Figure 20, the five groups of first color temperature sensing subunit 410, second color temperature sensing subunit 420, third color temperature sensing subunit 430, first white light sensing subunit 440 and reference sensing subunit 450 are arranged alternately in the second direction y.

[0128] As shown in Figure 21, the first color temperature sensing subunit 410, the second color temperature sensing subunit 420, the third color temperature sensing subunit 430, the first white light sensing subunit 440, and the reference sensing subunit 450 each include multiple photosensitive transistors. For example, the first color temperature sensing unit 401, the second color temperature sensing unit 402, the third color temperature sensing unit 403, the first white light sensing unit 404, and the reference sensing unit 405 each include 75 photosensitive transistors. Each of the first color temperature sensing subunit 410, the second color temperature sensing subunit 420, the third color temperature sensing subunit 430, the first white light sensing subunit 440, and the reference sensing subunit 450 includes the same number of photosensitive transistors, which is 15. The control terminal, input terminal, and output terminal of each photosensitive transistor are connected to the corresponding signal line, and the connection method can be as shown in Figure 5.

[0129] In some feasible embodiments, the first color temperature sensing unit 401, the second color temperature sensing unit 402, the third color temperature sensing unit 403, the first white light sensing unit 404, and the reference sensing unit 405 are located in the first sub-area 204 of the display panel 100. The first color temperature sensing unit 401 includes multiple first color temperature sensing subunits 410, the second color temperature sensing unit 402 includes multiple second color temperature sensing subunits 420, the third color temperature sensing unit 403 includes multiple third color temperature sensing subunits 430, and the reference sensing unit 405 includes multiple 150. For example, the number of the first color temperature sensing subunits 410, the second color temperature sensing subunits 420, the third color temperature sensing subunits 430, and the reference sensing subunits 450 are all 5. One first color temperature sensing subunit 410, one second color temperature sensing subunit 420, one third color temperature sensing subunit 430, and one reference sensing subunit 450 are arranged in a group in the second direction y, and a total of five groups of first color temperature sensing subunits 410, second color temperature sensing subunits 420, third color temperature sensing subunits 430, and reference sensing subunits 450 are arranged alternately in the second direction y.

[0130] The applicant discovered that the sensing signal still exhibited inaccuracies. Through analysis of the product spectrum, it was found that the photosensitive transistor of the sensing unit 40 also responded to invisible light, such as wavelengths of 840nm and 900nm. When the proportion of invisible light in the ambient light was large, the sensing signal error increased. Therefore, a light-shielding layer 904 was added to the side of the sensing unit 40 away from the substrate 801, as shown in Figures 22 and 23. Figure 22 is a structural diagram of another display panel according to some embodiments, and Figure 23 is a partial structural diagram of another display panel according to some embodiments. The display panel 100 also includes a light-shielding layer 904. Referring to Figure 4, the light-shielding layer 904 can be located on the side of the sensing unit 40 away from the substrate 801. The light-shielding layer 904 is used to filter at least one of infrared light and ultraviolet light. In some feasible embodiments, the light-shielding layer 904 is located in the first sub-region 204. Exemplarily, the dimension of the light-shielding layer 904 in the first direction x is 0.2mm-0.7mm, and the dimension in the second direction y is 3.5mm-7mm. The size of the light-shielding layer 904 can be determined based on the aspect ratio of the sensing unit 40.

[0131] The light-shielding layer 904 can filter infrared and / or ultraviolet light. On the one hand, it can reduce the amount of invisible light shining on the sensing unit 40, reduce the influence of invisible light on the sensing signal, and improve the accuracy of sensing. On the other hand, it can reduce the ultraviolet light emitted by the display panel 100, reducing the stimulation of the screen to the user's eyes.

[0132] This disclosure also provides a sensing method for a display device, as shown in FIG24, which is a flowchart of a sensing method for a display device according to some embodiments. The display device includes a display panel as described in any of the preceding claims; the sensing method is described herein using an example of a display device including the display panel 100 shown in FIG5.

[0133] The sensing method includes steps S10 and S20.

[0134] In step S10, the first white light sensing signal sensed by the first white light sensing unit 404 and the second white light sensing signal sensed by the second white light sensing unit 406 are obtained.

[0135] In step S20, the intensity of the current ambient light is obtained based on the first white light sensing signal and the second white light sensing signal.

[0136] For example, the sensing method further includes steps S41 to S44, as shown in FIG25, which is a flowchart of another sensing method of a display device according to some embodiments.

[0137] In step S41, it is determined whether the difference between the first white light sensing signal and the second white light sensing signal is less than or equal to a preset threshold. If yes, proceed to step S42; otherwise, proceed to step S43. For example, due to manufacturing processes, circuit component errors in actual application scenarios, etc., even if the first white light sensing unit 404 and the second white light sensing unit 406 receive the same ambient light, there will still be a certain difference between the first white light sensing signal and the second white light sensing signal output by the two units. Therefore, the preset threshold is greater than the difference between the first white light sensing signal and the second white light sensing signal caused by engineering deviations such as component defects, thereby improving the accuracy of brightness detection.

[0138] In step S42, the intensity of the current ambient light is obtained based on the average value of the first white light sensing signal and the second white light sensing signal. For example, the average value of the first white light sensing signal and the second white light sensing signal is used as the white light sensing signal to obtain the brightness of the current ambient light.

[0139] If the difference between the first white light sensing signal and the second white light sensing signal is greater than a preset threshold, the intensity of the current ambient light is obtained based on either the first white light sensing signal or the second white light sensing signal.

[0140] For example, in step S43, the multiple color temperature sensing signals include a first color temperature sensing signal, a second color temperature sensing signal, and a third color temperature sensing signal, and a reference white light sensing signal is obtained based on the multiple color temperature sensing signals. For example, the reference white light sensing signal is obtained by adding the multiple color temperature sensing signals together.

[0141] In step S44, the intensity of the current ambient light is obtained based on the one of the first white light sensing signal and the second white light sensing signal that is closer to the reference white light sensing signal. For example, the one of the first white light sensing signal and the second white light sensing signal that is closer to the reference white light sensing signal is selected and used as the white light sensing signal to obtain the intensity of the current ambient light.

[0142] The display panel 100 includes a first white light sensing unit 404 and a second white light sensing unit 406. If both the first white light sensing unit 404 and the second white light sensing unit 406 can receive ambient light, the first white light sensing signal and the second white light sensing signal output by the two are basically the same. The difference may be due to errors caused by process or environmental factors.

[0143] If the sensing signal of either the first white light sensing unit 404 or the second white light sensing unit 406 suddenly drops due to ink obstruction or other reasons, multiple color temperature sensing signals are used for judgment. The first white light sensing signal and the second white light sensing signal that are basically consistent with the sum of the multiple color temperature sensing signals are the sensing signals output by the unobstructed sensing unit, which can be used for subsequent detection, calculation, etc.

[0144] By setting two white light sensing units, the first white light sensing unit 404 and the second white light sensing unit 406, the problem of sudden drop in light sensing data caused by the obstruction of a single white light sensing unit can be avoided. Furthermore, by using the sensing signals output by the first color temperature sensing unit 401, the second color temperature sensing unit 402, and the third color temperature sensing unit 403 to obtain a reference white light sensing signal, it is possible to determine which sensing unit (first white light sensing unit 404 or second white light sensing unit 406) is not obstructed. Therefore, the sensing signal output by the unobstructed sensing unit is used, improving the accuracy of brightness detection.

[0145] The first white light sensing unit 404 and the second white light sensing unit 406 are disposed on opposite sides of the display area 10, ensuring that if one of them experiences a sudden drop in sensing signal due to obstruction, the other can still receive ambient light and output a sensing signal, thereby improving the accuracy of brightness detection.

[0146] As shown in Figure 26, step S20 further includes steps S21, S22, S23, S25, and S26. Figure 26 is a flowchart of another sensing method of a display device according to some embodiments.

[0147] In step S21, the reference sensing signal output by the reference sensing unit 405 is acquired.

[0148] In step S22, a first compensation value and a second compensation value are obtained. The first compensation value is the signal output by the reference sensing unit 405 under 0 lux light intensity, and the second compensation value is the signal output by the first white light sensing unit 404 or the second white light sensing unit 406 under 0 lux light intensity.

[0149] Refer to Figure 27, which is an illuminance-voltage curve of the sensing unit. In Figure 27, the horizontal axis represents light intensity in lux, and the vertical axis represents voltage in mV. The vertical axis voltage is, for example, a digital voltage.

[0150] For example, the display panel 100 is placed under different illuminance levels to obtain the corresponding illuminance voltage, and multiple binding points are obtained. The multiple binding points are then linearized to obtain the illuminance voltage curve shown in Figure 27.

[0151] In step S23, the temperature correction coefficient is obtained based on the first white light sensing signal, the second white light sensing signal, the reference sensing signal, the first compensation value, and the second compensation value.

[0152] For example, when the display panel 100 is off, the difference between the reference sensing signal and the first compensation value is calculated, and the difference between the white light sensing signal and the second compensation value is subtracted to obtain the temperature correction parameter. The white light sensing signal is obtained from the first white light sensing signal and the second white light sensing signal in step S10.

[0153] In step S25, the backlight correction coefficient is obtained based on the reference sensing signal and the first compensation value;

[0154] For example, the difference between the reference sensing signal and the first compensation value is calculated after the backlight of the display panel 100 is turned on to obtain the backlight correction coefficient.

[0155] In step S26, the intensity of the current ambient light is obtained based on the first white light sensing signal, the second white light sensing signal, the temperature correction coefficient, and the backlight correction coefficient.

[0156] The difference between the white light sensing signal and the reference sensing signal, after being corrected by the temperature correction coefficient and the backlight correction coefficient, yields the intensity of the current ambient light according to the illuminance voltage curve shown in Figure 27.

[0157] The temperature correction coefficient can reduce the impact of temperature changes in the display panel 100 on the photosensitive transistors of the sensing unit 40, and the backlight correction coefficient can reduce the impact of backlight illumination on the photosensitive transistors of the sensing unit 40, effectively improving the accuracy of brightness detection and expanding the application scenarios of the display panel 100 at different temperatures. The display panel 100 is also configured to adjust the brightness of the display area 10 according to the brightness detection, so that the brightness of the display panel 100 changes with the ambient brightness, effectively reducing the power consumption of the display panel 100.

[0158] In some feasible embodiments, step S20 further includes step S24, in which the intensity of the current ambient light is obtained based on the first white light sensing signal, the second white light sensing signal, and the temperature correction coefficient. That is, temperature correction is performed only on the sensing signals. For example, temperature correction can be performed without backlight correction to obtain the intensity of the current ambient light.

[0159] In some feasible embodiments, step S20 further includes steps S27 and S28.

[0160] In step S27, multiple color temperature sensing signals obtained by multiple color temperature sensing units are acquired. The multiple color temperature sensing signals include a first color temperature sensing signal, a second color temperature sensing signal, and a third color temperature sensing signal.

[0161] For example, the first color temperature sensing signal is R, the second color temperature sensing signal is G, and the third color temperature sensing signal is B.

[0162] In step S28, the color temperature of the current ambient light is obtained based on multiple color temperature sensing signals and at least one of temperature correction coefficient and backlight correction coefficient.

[0163] Calculate the difference between multiple color temperature sensing signals under the current ambient light and multiple reference color temperature sensing signals output by multiple color temperature sensing units under 0 lux light intensity. After applying at least one of temperature correction and light source correction, obtain the voltage change values ​​XR, XG and XB of multiple color temperature sensing signals.

[0164] Since the voltage change values ​​XR, XG, and XB of the current color temperature sensing signal are RGB values ​​under the color filter, they need to be fitted first. The fitting process includes:

[0165] The calibration values ​​Rbd, Gbd, and Bbd of multiple color temperature sensing signals are obtained based on the voltage change values ​​XR, XG, and XB of multiple color temperature sensing signals. Rbd = XR / Ra, Gbd = XG / Ga, Bbd = XB / Ba, where Ra, Ga, and Ba are preset coefficients. For example, Ra = 0.88, Ga = 0.919, and Ba = 0.838. Ra, Ga, and Ba can be adjusted according to different display panels 100, and this embodiment does not limit this.

[0166] Based on the calibration values ​​Rbd, Gbd, and Bbd of multiple color temperature sensing signals, normalized multiple color temperature sensing signals Rgy, Ggy, and Dgy are obtained, and their calculation formulas are as follows:

[0167] Rgy=IF(Rbd<3000,0.002*Rbd^1.6332,Rbd≥3000,0.00004*Rbd^2.123)

[0168] Ggy=IF(Gbd<4000,0.0003*Gbd^1.8325,Gbd≥4000,0.0001*Gbd^1.9606)

[0169] Bgy=IF(Bbd<3500,17.155*EXP(0.0014*Bbd),Bbd≥3500,0.0001*Bbd^1.9996)

[0170] The tristimulus values ​​XYZ are obtained based on the normalized color temperature sensing signals Rgy, Ggy, and Dgy, and their calculation formula is as follows:

[0171] The color coordinates x1 and y1 are obtained based on the tristimulus values ​​XYZ, and their calculation formulas are as follows: x1=X / (X+Y+Z) y1=Y / (X+Y+Z)

[0172] The Correlated Color Temperature (CCT) is calculated based on color coordinates x1 and y1, using the following formula: CCT = 437*n^3 + 3601*n^2 + 6831*n + 5517

[0173] Where, n = (x1 - 0.3321) / (0.1858 - y)

[0174] In some feasible implementations, the sensing method also includes steps S31 and S32.

[0175] In step S31, the type of current ambient light is determined based on its color temperature. The type of current ambient light can be a cool white fluorescent lamp (CWF), a tri-phosphor fluorescent lamp (TL84), a super fluorescent lamp (3000KU30), an incandescent lamp (A), or a fluorescent lamp (6500KD65), etc. For example, the type of current ambient light can be determined by color coordinate values, or by calculating the ratio coefficients corresponding to multiple color temperature sensing signals.

[0176] In step S32, the illuminance of the display device is determined based on the intensity and type of the current ambient light. For example, the illuminance calculation can be based on the difference between the color temperature sensing unit and the reference sensing unit, or on the difference between multiple white light sensing units and the reference sensing unit. Since the color temperature sensing unit and the multiple white light sensing units respond differently under different types of ambient light, when the color temperature sensing unit is a green color temperature sensing unit, the illuminance coefficient of the CWF light source is 1, while the illuminance coefficient of the D65 light source is 1.06. Therefore, the slope of the binding point in Figure 27 needs to be adjusted synchronously to improve the accuracy of brightness detection. That is, the current light source type is first determined, the light source correction coefficient is obtained, and the illuminance of the current ambient light is obtained after adjusting the binding point.

[0177] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display panel, comprising a display area and a peripheral area surrounding the display area; the display panel comprising: Substrate; Multiple sensing units are disposed on the substrate and located in the peripheral area; The sensing unit includes at least one photosensitive transistor; Multiple filter sections, one of which is located on the side of the sensing unit away from the substrate; The plurality of sensing units include a plurality of white light sensing units, the filter portion above the white light sensing unit is hollowed out or transparent, and at least two of the white light sensing units are respectively located in the peripheral area corresponding to different sides of the display panel.

2. The display panel according to claim 1, wherein, The peripheral area includes a first sub-area, a second sub-area, a third sub-area, and a fourth sub-area. The first sub-area and the second sub-area are located on opposite sides of the display area in a first direction, and the third sub-area and the fourth sub-area are located on opposite sides of the display area in a second direction. The first direction and the second direction are perpendicular to the thickness direction of the display panel and intersect each other. The plurality of white light sensing units include a first white light sensing unit and a second white light sensing unit; The first white light sensing unit is located in the first sub-region, and the second white light sensing unit is located in the second sub-region; or... The first white light sensing unit is located in the third sub-region, and the second white light sensing unit is located in the fourth sub-region.

3. The display panel according to claim 2, wherein, The plurality of sensing units further includes a reference sensing unit and a plurality of color temperature sensing units, wherein a light-blocking section above the reference sensing unit blocks light; different color temperature sensing units allow different colors of light to pass through their respective light-blocking sections. The reference sensing unit and the plurality of color temperature sensing units are located in the first sub-region.

4. The display panel according to claim 3 further includes a control signal line, a first input signal line, and a second input signal line; The control terminals of the photosensitive transistors of the reference sensing unit, the plurality of color temperature sensing units, the first white light sensing unit, and the second white light sensing unit are connected to the control signal line to receive control signals and to turn on or off in response to the control signals. The input terminals of the photosensitive transistors of the reference sensing unit and the plurality of color temperature sensing units are connected to the first input signal line to receive the first input signal; The input terminals of the photosensitive transistors of the first white light sensing unit and the second white light sensing unit are connected to the second input signal line to receive the second input signal; The phase difference between the first input signal and the second input signal is 180 degrees.

5. The display panel according to claim 4, wherein, The control signal line includes a first control signal line and a second control signal line, and the first control signal line and the second control signal line are configured to transmit the same control signal. The control terminals of the photosensitive transistors of the plurality of color temperature sensing units are connected to the first control signal line, the first control signal line extends in the third sub-region and extends to the second sub-region; the control terminals of the photosensitive transistors of the reference sensing unit are connected to the second control signal line, the second control signal line extends along the fourth sub-region and extends to the second sub-region. The control terminal of the phototransistor of the first white light sensing unit is connected to one of the first control signal line and the second control signal line, and the control terminal of the phototransistor of the second white light sensing unit is connected to the other of the first control signal line and the second control signal line.

6. The display panel according to any one of claims 1 to 5, further comprising a plurality of output signal lines; The output terminal of the photosensitive transistor of one of the sensing units is connected to an output signal line, which is configured to transmit the sensing signal output by the photosensitive transistor.

7. The display panel according to any one of claims 3 to 5, wherein, The plurality of color temperature sensing units include a first color temperature sensing unit, a second color temperature sensing unit, and a third color temperature sensing unit. The first color temperature sensing unit includes a plurality of first color temperature sensing sub-units, the second color temperature sensing unit includes a plurality of second color temperature sensing sub-units, and the third color temperature sensing unit includes a plurality of third color temperature sensing sub-units. The plurality of first color temperature sensing sub-units, the plurality of second color temperature sensing sub-units, and the plurality of third color temperature sensing sub-units are arranged alternately in the second direction.

8. The display panel according to claim 7, wherein, The reference sensing unit includes multiple reference sensing sub-units; The plurality of first color temperature sensing sub-units, the plurality of second color temperature sensing sub-units, the plurality of third color temperature sensing sub-units, and the plurality of reference sensing sub-units are arranged alternately in the second direction.

9. The display panel according to claim 8, wherein, The first white light sensing unit is located in the first sub-region, and the first white light sensing unit includes a plurality of first white light sensing sub-units; The plurality of first color temperature sensing sub-units, the plurality of second color temperature sensing sub-units, the plurality of third color temperature sensing sub-units, the plurality of reference sensing sub-units, and the plurality of first white light sensing sub-units are arranged alternately in the second direction.

10. The display panel according to any one of claims 7 to 9, wherein, The plurality of first color temperature sensing subunits include an equal number of photosensitive transistors, the plurality of second color temperature sensing subunits include an equal number of photosensitive transistors, and the plurality of third color temperature sensing subunits include an equal number of photosensitive transistors.

11. The display panel according to claim 9, wherein, Each of the sensing units includes 75 photosensitive transistors; Each of the sensing units includes 5 sensing sub-units, and each sensing sub-unit includes 15 photosensitive transistors; The spacing between two adjacent sensing sub-units ranges from 10 micrometers to 100 micrometers.

12. The display panel according to any one of claims 2 to 5, further comprising: A light-shielding layer is located in the first sub-region and on the side of the plurality of sensing units away from the substrate, the light-shielding layer being used to filter at least one of infrared light and ultraviolet light; The length of the light-shielding layer in the first direction ranges from 0.2 mm to 0.7 mm, and the size in the second direction ranges from 3.5 mm to 7 mm.

13. The display panel according to any one of claims 1 to 12, wherein, The plurality of sensing units include the same number of photosensitive transistors.

14. A display device, comprising: The display panel as described in any one of claims 1 to 13; The driver chip is configured to provide control signals and input signals to the sensing unit in the display panel, and to receive sensing signals output by the sensing unit based on the control signals and the input signals.

15. The display device according to claim 14, wherein, The driver chip is disposed on the display panel, and the driver chip is provided with a control pin, a first input pin and a second input pin; The control pin is connected to the control signal line of the display panel, the first input pin is connected to the first input signal line of the display panel, and the second input pin is connected to the second input signal line of the display panel.

16. The display device according to claim 15 further includes a flexible circuit board, the flexible circuit board having a plurality of first type pins and a plurality of second type pins, wherein the number of first type pins is greater than the number of second type pins; One of the first type pins is connected to an output signal line of the display panel, and one of the second type pins is connected to at least one of the first type pins; The driver chip is also provided with a plurality of receiving pins, the number of which is equal to the number of the second type of pins, and one receiving pin is connected to one second type of pin; When at least two first-type pins are connected to a second-type pin, the flexible circuit board is configured to output sensing signals from at least two sensing units to the driver chip via the second-type pin in a time-division manner.

17. The display device according to claim 16, wherein, The output signal lines of the display panel include: a first output signal line to a sixth output signal line, which are respectively connected to the first color temperature sensing unit, the second color temperature sensing unit, the third color temperature sensing unit, the first white light sensing unit, the reference sensing unit, and the second white light sensing unit; The plurality of first-type pins include: first pins to sixth pins, respectively connected to the first output signal line to the sixth output signal line; the plurality of second-type pins include: seventh pins to tenth pins; wherein... Pin 9 connects to pin 5 and one of pins 1 through 4; Pin 10 connects to pin 6, and another pin among pins 1 through 4; Pin 7 and pin 8 are respectively connected to the remaining two pins from pin 1 to pin 4.

18. The display device according to claim 16 or 17, wherein, The flexible circuit board further includes a conversion circuit, through which each of the second type pins is connected to one or more of the first type pins; The conversion circuit is configured to convert the sensing signal transmitted from the output signal line to the first type of pin from a current signal to a voltage signal, and to transmit the converted sensing signal to the second type of pin.

19. The display device according to any one of claims 16 to 18, wherein, The driver chip also includes an analog-to-digital converter circuit, which includes multiple signal receiving terminals. The number of signal receiving terminals is equal to the number of receiving pins, and one signal receiving terminal is connected to one receiving pin. The analog-to-digital converter circuit is configured to convert the sensing signal received via the signal receiver from an analog signal into a digital signal.

20. A sensing method for a display device, applied to the display device as described in any one of claims 14 to 19, the sensing method comprising: Acquire the first white light sensing signal sensed by the first white light sensing unit and the second white light sensing signal sensed by the second white light sensing unit; The intensity of the current ambient light is obtained based on the first white light sensing signal and the second white light sensing signal.

21. The sensing method according to claim 20, wherein, When the difference between the first white light sensing signal and the second white light sensing signal is less than or equal to a preset threshold, the intensity of the current ambient light is obtained based on the average value of the first white light sensing signal and the second white light sensing signal. The intensity of the current ambient light is obtained based on one of the first white light sensing signal and the second white light sensing signal, since the difference between the first white light sensing signal and the second white light sensing signal is greater than the preset threshold.

22. The sensing method according to claim 21, wherein, The multiple color temperature sensing signals include a first color temperature sensing signal, a second color temperature sensing signal, and a third color temperature sensing signal; The step of obtaining the intensity of the current ambient light based on one of the first white light sensing signal and the second white light sensing signal includes: A reference white light sensing signal is obtained based on the first color temperature sensing signal, the second color temperature sensing signal, and the third color temperature sensing signal; The intensity of the current ambient light is obtained from the one that is closer to the reference white light sensing signal between the first white light sensing signal and the second white light sensing signal.

23. The sensing method according to any one of claims 20 to 22, wherein, The step of obtaining the intensity of the current ambient light based on the first white light sensing signal and the second white light sensing signal includes: Acquire the reference sensing signal output by the reference sensing unit; Obtain a first compensation value and a second compensation value, wherein the first compensation value is the signal output by the reference sensing unit under 0 lux light intensity, and the second compensation value is the signal output by the first white light sensing unit or the second white light sensing unit under 0 lux light intensity. The temperature correction coefficient is obtained based on the first white light sensing signal, the second white light sensing signal, the reference sensing signal, the first compensation value, and the second compensation value; The intensity of the current ambient light is obtained based on the first white light sensing signal, the second white light sensing signal, and the temperature correction coefficient.

24. The sensing method according to claim 23, wherein, The step of obtaining the intensity of the current ambient light based on the first white light sensing signal and the second white light sensing signal further includes: The backlight correction coefficient is obtained based on the reference sensing signal and the first compensation value; The intensity of the current ambient light is obtained based on the first white light sensing signal, the second white light sensing signal, the temperature correction coefficient, and the backlight correction coefficient.

25. The sensing method according to claim 24, wherein, The sensing method further includes: Acquire multiple color temperature sensing signals obtained from multiple color temperature sensing units; The color temperature of the current ambient light is obtained based on the plurality of color temperature sensing signals and at least one of the temperature correction coefficient and the backlight correction coefficient.

26. The sensing method according to claim 25, wherein, The sensing method further includes: Determine the type of ambient light based on its color temperature; The illuminance of the display device is determined based on the intensity and type of the current ambient light.

Images