Display panel and brightness adjusting method of display panel

Abstract

The invention relates to a display panel and a brightness control method of the display panel, and the display panel comprises a light-emitting module which is arranged in a display area of the display panel; the ambient light detection module is arranged in the non-display area of the display panel, and the ambient light detection module comprises a plurality of ambient light sensors; wherein the non-display area of the display panel at least partially surrounds the display area of the display panel; and the control module is respectively connected with the light emitting module and the ambient light detection module, and is used for receiving ambient light detection signals from each ambient light sensor and controlling the light emitting brightness of the light emitting module based on at least one ambient light detection signal. Through the technical scheme provided by the invention, the technical problem of misalignment of brightness adjustment of the display panel caused by wrong shielding of the ambient light sensor is solved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel and a method for adjusting the brightness of the display panel. Background Technology

[0002] With the development of display technology, most current display panels are equipped with ambient light sensors (ALS) to sense ambient light brightness. The display panel can adjust the display brightness based on the ambient light brightness sensed by the ambient light sensor.

[0003] When an ambient light sensor is mounted on the display panel, it is prone to accidental occlusion. If this occurs, the sensor will output an incorrect ambient light signal, failing to accurately detect the ambient light brightness. This results in inappropriate adjustment of the display panel's brightness, severely impacting the accuracy of brightness control and the user's visual experience. Summary of the Invention

[0004] This application provides a display panel and a method for adjusting the brightness of the display panel to solve the technical problem of inaccurate brightness adjustment of the display panel caused by the ambient light sensor being accidentally blocked.

[0005] In a first aspect, this application provides a display panel, the display panel comprising: A light-emitting module is disposed in the display area of ​​the display panel; An ambient light detection module is disposed in the non-display area of ​​the display panel, and the ambient light detection module includes multiple ambient light sensors; wherein, the non-display area of ​​the display panel at least partially surrounds the display area of ​​the display panel; The control module is connected to the light-emitting module and the ambient light detection module respectively, and is used to receive ambient light detection signals from each of the ambient light sensors, and control the light emission brightness of the light-emitting module based on at least one of the ambient light detection signals.

[0006] In one feasible embodiment of this application, a plurality of the ambient light sensors are disposed on at least two different edge sides of the display panel.

[0007] In one feasible embodiment of this application, the ambient light sensor is a phototransistor, which includes a source, a drain, a gate, and a photosensitive active layer. The source and drain of the phototransistor are both covered on the photosensitive active layer and are both made of a transparent conductive material.

[0008] In one feasible embodiment of this application, the transparent conductive material is indium tin oxide.

[0009] In one feasible embodiment of this application, the display panel further includes: A common gate trace is provided, which is connected to the gate of each of the photosensitive transistors. A common drain trace is connected to the drain of each of the photosensitive transistors; Multiple independent source traces are provided, with one end of each independent source trace connected to the source of a photosensitive transistor and the other end connected to the control module.

[0010] In one feasible embodiment of this application, the light-emitting module includes a plurality of light-emitting transistors for emitting light, and the photosensitive transistors are formed synchronously with the light-emitting transistors using a 4-mask process.

[0011] In one feasible embodiment of this application, the control module includes: A comparison unit is used to compare multiple ambient light detection signals and determine the maximum ambient light detection signal from the multiple ambient light detection signals; wherein the maximum ambient light detection signal is the ambient light detection signal with the largest amplitude. The control unit is used to control the luminous brightness of the light-emitting module based on the maximum ambient light detection signal.

[0012] Secondly, this application provides a method for adjusting the brightness of a display panel, the method comprising: Ambient light is detected by an ambient light detection module to obtain an ambient light detection signal; wherein, the ambient light detection module includes multiple ambient light sensors, and the ambient light detection signal includes multiple signals; The luminous brightness of the light-emitting module is controlled based on at least one of the ambient light detection signals.

[0013] In one feasible embodiment of this application, the ambient light detection signal is a current signal, and controlling the luminous brightness of the light-emitting module based on at least one of the ambient light detection signals includes: The magnitudes of the current amplitudes of multiple current signals are directly compared, and the current signal with the largest current amplitude is determined as the maximum ambient light detection signal. The luminous brightness of the light-emitting module is controlled based on the maximum ambient light detection signal.

[0014] In one feasible embodiment of this application, the ambient light detection signal is a current signal, and controlling the luminous brightness of the light-emitting module based on at least one of the ambient light detection signals includes: Convert the current signal into a voltage signal; The voltage amplitudes of multiple voltage signals are compared, and the voltage signal with the largest voltage amplitude is determined as the maximum ambient light detection signal; The luminous brightness of the light-emitting module is controlled based on the maximum ambient light detection signal.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art: The display panel provided in this application embodiment includes a light-emitting module, an ambient light detection module, and a control module. The ambient light detection module includes multiple ambient light sensors to detect ambient light and determine the ambient light detection signal. The control module controls the brightness of the light-emitting module based on the multiple ambient light sensors.

[0016] The display panel provided in this application embodiment, on one hand, detects ambient light through multiple ambient light sensors. Even if one ambient light sensor is accidentally blocked, the control module can still adjust the brightness based on the ambient light detection signals obtained from the other ambient light sensors, thus minimizing the problem of accidental blocking during display panel operation. On the other hand, the control module controls the brightness of the light-emitting module based on multiple ambient light sensors, avoiding the impact of incorrect ambient light detection signals caused by accidental blocking on the accuracy of brightness adjustment.

[0017] In summary, the technical solution obtained in this application solves the technical problem of inaccurate brightness adjustment of the display panel caused by accidental occlusion of the ambient light sensor. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application; Figure 2A schematic diagram illustrating the placement of an ambient light sensor in a display panel, provided as an embodiment of this application. Figure 3 A cross-sectional schematic diagram of a light-emitting transistor and a photosensitive transistor in a display panel provided for an embodiment of this application; Figure 4 A schematic diagram illustrating the connection between a light-emitting transistor and a control module in a display panel, provided in an embodiment of this application; Figure 5 This application provides a schematic diagram of the structure of a control module in a display panel. Figure 6 This is a flowchart illustrating a brightness control method for a display panel provided in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures: 1. Light-emitting module; 2. Ambient light detection module; 3. Control module; 31. Comparison unit; 32. Control unit; ALS, Ambient light sensor; Ld, Common drain trace; Ls, Independent source trace; Lg, Common gate trace; TFT1, Light-emitting transistor; TFT2, Photosensitive transistor; 300, Substrate; 301, Gate layer; 302, Gate insulating layer; 303, Amorphous silicon active layer; 304, N+ layer; 305, Passivation layer; 306, Color dimming layer; 307, Ultra-black matrix layer. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0025] To address the technical problem of inaccurate brightness adjustment of display panels caused by accidental occlusion of ambient light sensors in existing technologies, this application provides a display panel and a brightness adjustment method for the display panel, which can accurately detect ambient light and thus ensure the accuracy of brightness adjustment.

[0026] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application, with reference to... Figure 1 The display panel provided in this application embodiment includes: Light-emitting module 1 is located in the display area of ​​the display panel; An ambient light detection module 2 is disposed in the non-display area of ​​the display panel. The ambient light detection module 2 includes multiple ambient light sensors (ALS). The non-display area of ​​the display panel at least partially surrounds the display area of ​​the display panel. The control module 3 is connected to the light-emitting module 1 and the ambient light detection module 2 respectively. It is used to receive ambient light detection signals from each ambient light sensor ALS and control the light-emitting brightness of the light-emitting module 1 based on at least one ambient light detection signal.

[0027] Specifically, the display panel provided in this application embodiment includes a display area (or AA area) and a non-display area (or BB area), with the non-display area disposed around the periphery of the display area, at least partially surrounding the display area.

[0028] In some typical application scenarios, the display area is the effective area used to present the image, while the non-display area is the border area around the display area.

[0029] The light-emitting module 1 is located in the display area of ​​the display panel. Specifically, it can be composed of an array of millions of pixel units. Each pixel unit emits light through a light-emitting transistor TFT1. The light-emitting module 1 is used to emit light according to the image signal to form a picture that can be viewed by the user.

[0030] The ambient light detection module 2 is located in the non-display area of ​​the display panel. The ambient light detection module 2 integrates multiple (i.e., two or more) independent ambient light sensors (ALS). These ambient light sensors (ALS) are distributed in different positions in the non-display area to sense the ambient light intensity of the environment in which the display panel is located from multiple angles.

[0031] The control module 3 is connected to the light-emitting module 1 and the ambient light detection module 2 in terms of circuitry or logic. This connection enables the control module 3 to perform the brightness adjustment function and control the light-emitting module 1, thereby realizing the brightness adjustment function of the display panel.

[0032] In some specific examples, control module 3 may be a timing controller (TCON) within the display panel.

[0033] When the display panel is in operation, each ambient light sensor (ALS) in the ambient light detection module 2 independently detects the ambient light intensity and generates a corresponding ambient light detection signal. These ambient light detection signals generated by multiple ambient light sensors (ALS) are transmitted to the control module 3 together.

[0034] After receiving detection signals from each ambient light sensor (ALS), the control module 3 uses its internal logic to comprehensively determine the ambient light intensity based on at least one received ambient light detection signal, and calculates a target luminous intensity accordingly. Finally, the control module 3 sends a command to the luminous module 1 to adjust its luminous intensity to the calculated target intensity.

[0035] The display panel provided in this application embodiment, on one hand, detects ambient light through multiple ambient light sensors (ALS). Even if one ALS is accidentally blocked, the control module 3 can still adjust the brightness based on the ambient light detection signals obtained from the other ALS, thus minimizing the risk of accidental blocking during display panel operation. On the other hand, the control module 3 controls the brightness of the light-emitting module 1 based on multiple ALS, avoiding errors in ambient light detection signals caused by accidental blocking that could affect the accuracy of brightness adjustment.

[0036] To further avoid the problem of accidental occlusion, in one feasible embodiment of this application, multiple ambient light sensors (ALS) are disposed on at least two different edge sides of the display panel.

[0037] Specifically, multiple ambient light sensors (ALS) are disposed on at least two different edge sides of the display panel, that is, ambient light sensors (ALS) are disposed on at least two edge sides of the display panel, namely the top, bottom, left and right edge sides.

[0038] Figure 2 This application provides a schematic diagram illustrating the placement of an ambient light sensor (ALS) in a display panel, as shown in the embodiment. Figure 2 As shown, in a specific example, there are four ambient light sensors (ALS) in the display panel. These four ambient light sensors are ALS1, ALS2, ALS3 and ALS4. ALS1 is located in the upper left corner of the non-display area of ​​the display panel, ALS2 is located in the lower left corner of the non-display area of ​​the display panel, ALS3 is located in the upper right corner of the non-display area of ​​the display panel, and ALS4 is located in the lower right corner of the non-display area of ​​the display panel.

[0039] Based on the technical solution provided in the above embodiments, the ambient light sensor ALS is set on at least two different edge sides. The different settings of the different ambient light sensor ALS make it difficult to block different ambient light sensor ALS at the same time. There will always be an unblocked ambient light sensor ALS that is detecting the ambient light intensity, which further avoids the occurrence of the problem of accidental blocking.

[0040] Figure 3This is a cross-sectional schematic diagram of a display panel containing a light-emitting transistor (TFT1) and a photosensitive transistor (TFT2) according to an embodiment of this application. (Refer to...) Figure 3 In one feasible embodiment of this application, the ambient light sensor ALS is a photosensitive transistor TFT2. The photosensitive transistor TFT2 includes a source, a drain, a gate, and a photosensitive active layer. The source and drain of the photosensitive transistor TFT2 are both covered on the photosensitive active layer and are both made of transparent conductive material.

[0041] Specifically, each ambient light sensor ALS in the ambient light detection module 2 is a photosensitive transistor TFT2. The photosensitive transistor TFT2 includes a gate, a drain, a source, and a photosensitive active layer. From the perspective of the stacked structure, the source and drain are both located above the photosensitive active layer, covering a portion of the photosensitive active layer.

[0042] In this embodiment, both the source and drain of the photosensitive transistor TFT2 are made of transparent conductive material. Therefore, since the source and drain themselves are transparent, when ambient light shines on the photosensitive transistor TFT2, the light can not only shine on the photosensitive layer of the exposed channel region between the source and drain, but also penetrate the transparent source and drain electrodes to shine on the photosensitive active layer covered by them.

[0043] In this way, the effective photosensitive area of ​​the phototransistor TFT2 is greatly increased, and a larger photocurrent can be generated under the same light intensity, thereby obtaining a more refined ambient light detection signal and significantly improving the detection sensitivity of a single ambient light sensor ALS.

[0044] In one feasible embodiment of this application, the transparent conductive material used to fabricate the source and drain of the photosensitive transistor TFT2 can be indium zinc oxide (IZO), graphene, indium tin oxide (ITO), etc., and preferably, the transparent conductive material is indium tin oxide.

[0045] Since the non-display area of ​​the display panel includes multiple ambient light sensors (ALS) in the technical solution provided in this application embodiment, in actual implementation, the multiple ambient light sensors (ALS) will lead to a more complex connection circuit when connected to the control module 3, which increases the number of traces in the non-display area, resulting in messy wiring in the non-display area, and thus making the ambient light sensors (ALS) prone to short circuit failure.

[0046] Figure 4 This is a schematic diagram illustrating the connection between the light-emitting transistor TFT1 and the control module 3 in a display panel according to an embodiment of this application. (Refer to...) Figure 4To address the technical problem that multiple ambient light sensors (ALS) increase the number of traces in the non-display area, thereby making the ALS prone to short circuits, in one feasible embodiment of this application, the display panel further includes: The common gate trace Lg is connected to the gate of each photosensitive transistor TFT2. The common drain line Ld is connected to the drain of each photosensitive transistor TFT2. Multiple independent source traces Ls are provided. One end of each independent source trace Ls is connected to the source of a photosensitive transistor TFT2, and the other end is connected to the control module 3.

[0047] Specifically, the common gate trace Lg connects the gates of all TFT2 photosensitive transistors, and the common drain trace Ld connects the drains of all TFT2 photosensitive transistors. By sharing gate and drain traces, the number of traces in the non-display area of ​​the display panel and the number of pins required for external connections can be significantly reduced. This not only simplifies the circuit layout in the non-display area and saves valuable wiring space, but also greatly reduces the risk of short circuits between traces.

[0048] In this embodiment, the common gate line Lg connects the drains of all photosensitive transistors (TFTs) 2, and the other end is connected to the control module 3. Similarly, the common drain line Ld connects the drains of all photosensitive transistors (TFTs) 2, and the other end is also connected to the control module 3. Specifically, the other ends of the common gate line Lg and the common drain line Ld can be connected to the display driver chip (DDIC) or the power management chip (PMIC) in the control module 3.

[0049] During operation, the control module 3 only needs to apply a control voltage through the common gate line Lg to simultaneously turn on all ambient light sensors ALS; and provides operating voltage to all ambient light sensors ALS through the common drain line Ld.

[0050] Each ambient light sensor (ALS) generates an independent photocurrent of varying magnitude based on the light intensity it senses. This current is then read by the control module 3 via multiple independent source lines (Ls), thus enabling independent monitoring of the status of each sensor.

[0051] In one feasible embodiment of this application, different independent source traces Ls are connected to different input pins of the control module 3. The control module 3 can number the different ambient light detection signals read based on the number of each input pin, thereby distinguishing the ambient light intensity detected by different ambient light sensors ALS.

[0052] To reduce the manufacturing cost of the display panel provided in the above embodiments of this application, in a feasible embodiment of this application, the photosensitive transistor TFT2 for ambient light detection and the light-emitting transistor TFT1 for emitting light are manufactured simultaneously. Specifically, the photosensitive transistor TFT2 is formed simultaneously with the light-emitting transistor TFT1 using a 4-mask process (four-mask process).

[0053] Based on the above embodiments, and continuing to refer to Figure 3 The provided schematic diagram shows the cross-sectional views of the light-emitting transistor TFT1 and the photosensitive transistor TFT2 in the display panel. The manufacturing process of the array substrate of this display panel is as follows: Step 1: Gate layer 301 is formed: A layer of metal material (such as copper Cu or molybdenum Mo) is deposited on the substrate 300 by means of sputtering or evaporation. The first photomask is used for photolithography and etching to define the gate electrode patterns of all transistors on the substrate 300. This pattern includes the gates of a large number of light-emitting transistors (TFTs1) located in the display area, as well as the gates of a number of photosensitive transistors (TFTs2) located in the non-display area.

[0054] The second step involves the gate insulating layer 302, the amorphous silicon active layer 303, and the source electrode (i.e., Figure 4 (S) and drain (i.e.) Figure 4 (D) Formation: On the substrate 300 where the gate has been formed, three thin films are continuously deposited: a gate insulating layer 302, an amorphous silicon active layer 303 (AS) as the core photosensitive material, and an N+ layer 304 for forming good ohmic contact. Using a second photomask, the amorphous silicon active layer 303 and N+ layer 304 are photolithographically and etched to form active islands for all transistors. A layer of indium tin oxide (ITO) is deposited on the entire substrate 300 as a transparent conductive material. Subsequently, photolithography and etching are performed using a third photomask to form the source and drain electrode patterns of all transistors. While etching the indium tin oxide, the underlying N+ layer 304 is also etched away, thereby exposing the channel region between the source and drain, completing the basic structure of the photosensitive transistor TFT2 and the light-emitting transistor TFT1. The source and drain of the light-emitting transistor TFT1 are made of copper (Cu) or aluminum (Al), while the source and drain of the photosensitive transistor TFT2 are made of indium tin oxide.

[0055] The third step is the formation of the passivation layer 305: A passivation layer 305 is deposited on the substrate 300 where the transistor structure has been formed to protect the underlying transistor structure from environmental influences. Using a fourth photomask for photolithography and etching, contact holes are opened on the passivation layer 305, so that these holes precisely expose the source or drain of the transistor below that needs to be externally connected.

[0056] Step 4: Formation of the ITO electrode layer: After the passivation layer 305 is completed and the opening is made, another layer of indium tin oxide (ITO) is deposited. In the display area, this ITO layer is connected to the electrode of the light-emitting transistor TFT1 through contact holes to form a pixel electrode. In the non-display area, this layer can be used to form the final lead-out trace connecting the source and drain of the photosensitive transistor TFT2.

[0057] After forming the array substrate 300, a color dimming layer 306 is formed above the light-emitting transistor TFT1 to dim the light-emitting transistor TFT1; at the same time, an ultra-black matrix layer 307 is formed between the light-emitting transistors TFT1 / between the light-emitting transistor TFT1 and the photosensitive transistor TFT2 to prevent light leakage.

[0058] Figure 5 This is a schematic diagram of the structure of the control module 3 in a display panel provided in an embodiment of this application, with reference to... Figure 5 In one feasible embodiment of this application, the control module 3 includes: The comparison unit 31 is used to compare multiple ambient light detection signals and determine the maximum ambient light detection signal from the multiple ambient light detection signals; wherein, the maximum ambient light detection signal is the ambient light detection signal with the largest amplitude; The control unit 32 is used to control the luminous brightness of the light-emitting module 1 based on the maximum ambient light detection signal.

[0059] Specifically, the comparison unit 31 receives ambient light detection signals detected by multiple ambient light sensors ALS. After receiving multiple ambient light detection signals, the comparison unit 31 compares each ambient light detection signal and determines the maximum ambient light detection signal, which is the ambient light detection signal with the largest amplitude.

[0060] In one feasible embodiment of this application, the comparison unit 31 may specifically be a current comparator. The ambient light detection signal is a current signal. The current comparator directly compares the magnitude of the current amplitude of each ambient light detection signal and determines the current signal with the largest current amplitude as the maximum ambient light detection signal.

[0061] In one feasible embodiment of this application, the comparison unit 31 may specifically be a voltage comparator. The ambient light detection signal is a current signal. The control module 3 first converts the ambient light detection signal from a current signal to a voltage signal. After the conversion is completed, the voltage comparator compares the voltage amplitude of each ambient light detection signal and determines the current signal with the largest voltage amplitude as the maximum ambient light detection signal.

[0062] After determining the maximum ambient light detection signal, the comparison unit 31 transmits the maximum ambient light detection signal to the control unit 32, which then performs the final brightness adjustment.

[0063] The control unit 32 receives the maximum ambient light detection signal filtered by the comparison unit 31. The control unit 32 uses this confirmed and valid ambient light detection signal as the final judgment basis to calculate the most suitable screen brightness at the moment, and generates corresponding control commands to send to the light-emitting module 1 to complete the precise adjustment of the brightness of the display panel.

[0064] The technical solution provided in this embodiment further solves the technical problem of inaccurate brightness adjustment of the display panel caused by accidental occlusion of the ambient light sensor (ALS). In the technical solution provided in this application embodiment, if one or more of the multiple ambient light sensors (ALS) are occluded, the ambient light detection signal determined by the occluded ALS will be significantly lower. However, by adopting the technical solution provided in the above embodiment of this application, and by selecting only the maximum value, these invalid signals generated by occlusion can be ignored, and the valid signals provided by other unoccluded ambient light sensors (ALS) that can truly reflect the current ambient brightness can be adopted, thereby ensuring that the brightness of the display panel is accurately adjusted.

[0065] Furthermore, to achieve effective utilization of various ambient light detection signals, in one feasible embodiment of this application, the control module 3 is configured as follows: Determine the configuration weights for each ambient light detection signal; where the configuration weights are related to the setting position of the ambient light sensor (ALS) that collects each ambient light detection signal. The brightness of the light-emitting module 1 is controlled based on the ambient light detection signals.

[0066] Specifically, in this embodiment, considering the setting position of each ambient light detection signal, different configuration weights are assigned to different ambient light detection signals. After obtaining multiple configuration weights and multiple ambient light detection signals, the control module 3 performs a weighted average to calculate the current ambient light intensity, thereby controlling the luminous brightness of the luminous module 1.

[0067] The configuration weight of the ambient light detection signal is related to the location of the ambient light sensor (ALS) that collects the ambient light detection signal. For example, an ambient light sensor (ALS) located at the top of the display panel and not easily blocked by hand can be given a higher configuration weight, while an ambient light sensor (ALS) located at the bottom and easily blocked can be given a lower configuration weight.

[0068] Compared to the brightness adjustment technique using the maximum ambient light detection signal described in the above embodiments, the technique of setting configuration weights in this embodiment considers the ambient light detection status of all ambient light sensors (ALS), even if some ALS sensors may be mistakenly blocked. The technique provided by this embodiment can, to a certain extent, reduce the impact of the ambient light detection signal obtained by the ALS sensors in easily blocked areas on the final result, while fully considering the ambient light detection signals obtained by ALS sensors at different locations.

[0069] Figure 6 This is a flowchart illustrating a brightness control method for a display panel provided in an embodiment of this application. This method can be applied to the display panel described in any of the above embodiments, and specifically, it can be applied to the control module 3 of the display panel. (Refer to...) Figure 6 The method specifically includes the following steps: S1: Ambient light is detected by ambient light detection module 2 to obtain ambient light detection signals; wherein, ambient light detection module 2 includes multiple ambient light sensors ALS, and the ambient light detection signals include multiple signals; Specifically, when the display panel needs to automatically adjust its brightness, the control module 3 activates the ambient light detection module 2 located in the non-display area. Multiple ambient light sensors (ALS) within the ambient light detection module 2 simultaneously begin operating, each sensing the ambient light intensity at its location and generating an ambient light detection signal. Typically, the raw signal directly output from the ambient light sensor ALS is a current signal (i.e., photocurrent), the amplitude of which is proportional to the light intensity. Therefore, the control module 3 will obtain multiple current signals with potentially different amplitudes.

[0070] S2: Control the brightness of the light-emitting module 1 based on at least one ambient light detection signal; Specifically, after receiving multiple ambient light detection signals, the control module 3, based on its internally set logic, comprehensively judges the ambient light intensity of the current environment based on at least one received ambient light detection signal, and calculates a target luminous brightness accordingly. Finally, the control module 3 sends a command to the luminous module 1 to adjust its luminous brightness to the calculated target brightness, thereby achieving brightness control.

[0071] As a specific example, the brightness of the light-emitting module 1 can be controlled by adjusting the duty cycle of the PWM signal of the light-emitting module 1.

[0072] In one feasible embodiment of this application, the ambient light detection signal is a current signal, and the brightness of the light-emitting module 1 is controlled according to at least one ambient light detection signal, including: By directly comparing the magnitudes of multiple current signals, the current signal with the largest current amplitude is determined as the maximum ambient light detection signal. The brightness of the light-emitting module 1 is controlled based on the maximum ambient light detection signal.

[0073] In one feasible embodiment of this application, the ambient light detection signal is a current signal, and the brightness of the light-emitting module 1 is controlled according to at least one ambient light detection signal, including: Convert current signals into voltage signals; Compare the voltage amplitudes of multiple voltage signals and determine the voltage signal with the largest voltage amplitude as the maximum ambient light detection signal; The brightness of the light-emitting module 1 is controlled based on the maximum ambient light detection signal.

[0074] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0075] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A display panel, characterized in that, The display panel includes: A light-emitting module is disposed in the display area of ​​the display panel; An ambient light detection module is disposed in the non-display area of ​​the display panel, and the ambient light detection module includes multiple ambient light sensors; wherein, the non-display area of ​​the display panel at least partially surrounds the display area of ​​the display panel; The control module is connected to the light-emitting module and the ambient light detection module respectively, and is used to receive ambient light detection signals from each of the ambient light sensors, and control the light emission brightness of the light-emitting module based on at least one of the ambient light detection signals.

2. The display panel according to claim 1, characterized in that, Multiple ambient light sensors are disposed on at least two different edge sides of the display panel.

3. The display panel according to claim 1, characterized in that, The ambient light sensor is a phototransistor, which includes a source, a drain, a gate, and a photosensitive active layer. The source and drain of the phototransistor are both covered on the photosensitive active layer and are both made of transparent conductive material.

4. The display panel according to claim 3, characterized in that, The transparent conductive material is indium tin oxide.

5. The display panel according to claim 3, characterized in that, The display panel also includes: A common gate trace is provided, which is connected to the gate of each of the photosensitive transistors. A common drain trace is connected to the drain of each of the photosensitive transistors; Multiple independent source traces are provided, with one end of each independent source trace connected to the source of a photosensitive transistor and the other end connected to the control module.

6. The display panel according to claim 3, characterized in that, The light-emitting module includes multiple light-emitting transistors for emitting light, and the photosensitive transistors are formed synchronously with the light-emitting transistors using a 4-mask process.

7. The display panel according to claim 1, characterized in that, The control module includes: A comparison unit is used to compare multiple ambient light detection signals and determine the maximum ambient light detection signal from the multiple ambient light detection signals; wherein the maximum ambient light detection signal is the ambient light detection signal with the largest amplitude. The control unit is used to control the luminous brightness of the light-emitting module based on the maximum ambient light detection signal.

8. A method for adjusting the brightness of a display panel according to any one of claims 1 to 7, characterized in that, The method includes: Ambient light is detected by an ambient light detection module to obtain an ambient light detection signal; wherein, the ambient light detection module includes multiple ambient light sensors, and the ambient light detection signal includes multiple signals; The luminous brightness of the light-emitting module is controlled based on at least one of the ambient light detection signals.

9. The method according to claim 8, characterized in that, The ambient light detection signal is a current signal, and the brightness of the light-emitting module is controlled based on at least one of the ambient light detection signals, including: The magnitudes of the current amplitudes of multiple current signals are directly compared, and the current signal with the largest current amplitude is determined as the maximum ambient light detection signal. The luminous brightness of the light-emitting module is controlled based on the maximum ambient light detection signal.

10. The method according to claim 8, characterized in that, The ambient light detection signal is a current signal, and the brightness of the light-emitting module is controlled based on at least one of the ambient light detection signals, including: Convert the current signal into a voltage signal; The voltage amplitudes of multiple voltage signals are compared, and the voltage signal with the largest voltage amplitude is determined as the maximum ambient light detection signal; The luminous brightness of the light-emitting module is controlled based on the maximum ambient light detection signal.

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