Display module and display device

Abstract

A display module and display device are provided, belonging to the field of display technology. The display module includes multiple light-emitting elements and multiple sets of ambient light sensors located on a display panel. Each set of ambient light sensors includes multiple photosensitive transistors connected in parallel. These sensors output a light brightness sensing signal reflecting the brightness level under the control of a photosensitive control signal transmitted by a brightness control circuit. The brightness control circuit then controls the brightness of the multiple light-emitting elements based on the light brightness sensing signal. This enables adaptive adjustment of display brightness.

Description

Technical Field

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

[0002] With the development of display technology, current display devices are mostly provided with an ambient light sensor (ALS) to sense the brightness of ambient light, so that the display device can adaptively adjust the display brightness based on the brightness of the ambient light.

[0003] However, for small-sized display devices (such as many wearable devices), considering the cost and full-screen requirements, it is usually impossible to open a hole on the front of the display panel or install an external ALS to sense the ambient light brightness. This also results in most small-sized display devices being unable to adaptively adjust the display brightness based on the ambient light brightness. Summary of the Invention

[0004] A display module and a display device are provided to solve the problem in related art that most small-sized display devices cannot adaptively adjust the display brightness based on the ambient light brightness. The technical solution is as follows:

[0005] In one aspect, a display module is provided, comprising:

[0006] A display panel having a display area and a peripheral area at least partially surrounding the display area;

[0007] A plurality of light-emitting elements are located in the display area;

[0008] At least two groups of ambient light sensors are located in the peripheral area, each group of the ambient light sensors includes: a bright state sensor and a dark state sensor connected in parallel, and each of the bright state sensor and the dark state sensor includes: a plurality of photosensitive transistors connected in parallel;

[0009] The brightness control circuit is electrically connected to the at least two groups of ambient light sensors and the multiple light-emitting elements, respectively, and is used to: transmit a photosensitivity control signal to the at least two groups of ambient light sensors, receive a light brightness sensing signal transmitted by the at least two groups of ambient light sensors in response to the photosensitivity control signal, and control the light brightness of the multiple light-emitting elements based on the light brightness sensing signal transmitted by at least one group of the ambient light sensors.

[0010] Optionally, the at least two groups of ambient light sensors are configured to alternately and intermittently transmit the light brightness sensing signal based on the photosensitivity control signal.

[0011] Optionally, the display module further includes: at least two switching transistors corresponding one-to-one to the at least two groups of ambient light sensors, each of the switching transistors being connected between the brightness control circuit and a corresponding group of ambient light sensors, and each of the switching transistors being configured to: receive a switching control signal and, in response to the switching control signal, control the on / off switching between the brightness control circuit and the corresponding group of ambient light sensors;

[0012] The potential of the switch control signal is an effective potential used to control the brightness control circuit to communicate with the corresponding group of ambient light sensors, so that the light sensing control signal provided by the ambient light sensor is transmitted to the ambient light sensor; the potential of the switch control signal is an invalid potential used to control the brightness control circuit to disconnect from the corresponding group of ambient light sensors;

[0013] Furthermore, among the at least two switching transistors, there is an interval between the effective potentials of the switching control signals received by any two of the switching transistors, so that the at least two groups of ambient light sensors transmit the light brightness sensing signals alternately and intermittently based on the photosensitivity control signal.

[0014] Optionally, the display module includes: two groups of ambient light sensors, and two switching transistors corresponding to the two groups of ambient light sensors on a one-to-one basis, and the interval between the two groups of ambient light sensors transmitting the light brightness sensing signals is 50 milliseconds.

[0015] Optionally, the brightness control circuit is used to:

[0016] When a difference between the light brightness sensing signals transmitted by the two groups of ambient light sensors is less than a difference threshold, controlling the light brightness of the plurality of light-emitting elements based on the light brightness sensing signals transmitted by the two groups of ambient light sensors;

[0017] When the difference between the light brightness sensing signals transmitted by the two groups of ambient light sensors is greater than or equal to the difference threshold, the luminous brightness of the multiple light-emitting elements is controlled based on the light brightness sensing signal transmitted by one of the groups of ambient light sensors, where one group of ambient light sensors is the group of ambient light sensors that transmits a relatively larger light brightness sensing signal among the two groups of ambient light sensors.

[0018] Optionally, the gate of each switching transistor is used to receive the switching control signal, the source of each switching transistor is connected to the brightness control circuit, and the drain of each switching transistor is connected to a corresponding group of ambient light sensors.

[0019] Optionally, the display module further comprises: a flexible printed circuit board and an array substrate;

[0020] The at least two switching transistors are located on the array substrate or the flexible printed circuit board.

[0021] Optionally, the brightness control circuit includes: a display driver chip and a light-emitting driver circuit;

[0022] The display driver chip is connected to the at least two groups of ambient light sensors and is configured to transmit the light sensing control signal to the at least two groups of ambient light sensors, receive the light brightness sensing signals transmitted by the at least two groups of ambient light sensors in response to the light sensing control signal, and convert the light brightness sensing signals transmitted by at least one group of the ambient light sensors into light brightness values; wherein different light brightness values ​​correspond to different light emitting drive signals;

[0023] The light-emitting driving circuit is connected to the plurality of light-emitting elements and is used to drive the plurality of light-emitting elements to emit light based on a light-emitting driving signal corresponding to the light brightness value, so as to control the light-emitting brightness of the plurality of light-emitting elements.

[0024] Optionally, the display driver chip is further configured to connect to a client and transmit the determined light brightness value to the client, so that the client can determine a light driving signal corresponding to the light brightness value and transmit the light driving signal to the connected light driving circuit;

[0025] Alternatively, the display driver chip is further connected to the light-emitting driver circuit, and the display driver chip is further configured to determine a light-emitting driver signal corresponding to the light brightness value and transmit the light-emitting driver signal to the light-emitting driver circuit.

[0026] Optionally, the display driver chip is further externally connected to a flash memory, and a communication connection is established between the display driver chip and the flash memory;

[0027] In the case where the display driver chip is used to determine the light driving signal corresponding to the light brightness value, the light driving signals corresponding to different brightness values ​​are stored in the flash memory in the form of a lookup table for the display driver chip to call.

[0028] Optionally, the peripheral area surrounds the display area, and the peripheral area includes: a first peripheral area and a second peripheral area located on opposite sides of the display area in a first direction;

[0029] The display driver chip is located in the first peripheral area;

[0030] In the case where the display module includes two groups of ambient light sensors, one group of ambient light sensors is located at the center of the second peripheral area, and the other group of ambient light sensors is located in the first peripheral area and on either side of the display driver chip in the second direction, or both groups of ambient light sensors are located at the center of the second peripheral area, and the second direction intersects with the first direction.

[0031] Optionally, when both groups of ambient light sensors are located at the center of the second peripheral area, along the second direction, the dark state sensors and the bright state sensors included in one group of ambient light sensors are arranged in sequence with the bright state sensors and the dark state sensors included in the other group of ambient light sensors.

[0032] Optionally, the display driver chip is connected to the source and drain of multiple photosensitive transistors connected in parallel in each group of the ambient light sensors, and is used to transmit the light-sensitive control signal to the source of the multiple photosensitive transistors, and receive the light brightness sensing signal transmitted by the drain of the multiple photosensitive transistors.

[0033] On the other hand, a display device is provided, comprising: a power supply, and the display module as described in the above aspect;

[0034] The power supply is connected to the display module and is used to supply power to the display module.

[0035] Optionally, the display device is a wearable device.

[0036] In summary, the beneficial effects brought about by the technical solution provided by this application may include at least:

[0037] A display module and display device are provided. The display module includes multiple light-emitting elements and multiple sets of ambient light sensors located on a display panel. Each set of ambient light sensors includes multiple photosensitive transistors connected in parallel. These sensors output a light brightness sensing signal reflecting the brightness level under the control of a photosensitive control signal transmitted by a brightness control circuit. The brightness control circuit then controls the brightness of the multiple light-emitting elements based on the light brightness sensing signal. This enables adaptive adjustment of display brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 11 is a schematic structural diagram of a display module provided in an embodiment of the present application;

[0040] Figure 2 Schematic diagram of the dimensions of an ambient light sensor provided in an embodiment of the present application;

[0041] Figure 3 is a structural diagram of another display module provided in an embodiment of the present application;

[0042] Figure 4 This is a schematic diagram of the connection between a display driver chip and a photosensitive transistor provided in an embodiment of the present application;

[0043] Figure 5 This is a schematic diagram of a connection between a display driver chip and a flash memory provided in an embodiment of the present application;

[0044] Figure 6 This is a schematic diagram of the structure of two groups of ambient light sensors provided in an embodiment of the present application;

[0045] Figure 7 Schematic diagram of a display module including a switching transistor provided in an embodiment of the present application;

[0046] Figure 8 This is a schematic diagram of the connection between a display driver chip and a switching transistor provided in an embodiment of the present application;

[0047] Figure 9 This is a signal timing diagram for driving a switching transistor provided by an embodiment of the present application;

[0048] Figure 10 This is a schematic diagram of the location of an ambient light sensor provided in an embodiment of the present application;

[0049] Figure 11 This is a schematic diagram of another arrangement position of an ambient light sensor provided in an embodiment of the present application;

[0050] Figure 12 This is a schematic diagram of another arrangement position of an ambient light sensor provided in an embodiment of the present application;

[0051] Figure 13 This is a schematic diagram of the installation position of another ambient light sensor provided in an embodiment of the present application;

[0052] Figure 14 This is a schematic diagram of the installation position of another ambient light sensor provided in an embodiment of the present application;

[0053] Figure 15 This is a schematic diagram of the installation position of another ambient light sensor provided in an embodiment of the present application;

[0054] Figure 16It is a structural schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] To make the purpose, technical solutions and advantages of this application clearer, the following will further describe the implementation of this application in detail with reference to the accompanying drawings. The key terms involved in the examples of this application are introduced as follows:

[0056] Ambient light sensor (ALS): A sensor that senses the brightness or intensity of ambient light and converts it into an electrical signal. It has a wide range of applications in various fields. Of course, in some other embodiments, the ambient light sensor (ALS) is not limited to sensing ambient light.

[0057] Brightness sensors are more sensitive to higher light intensities and produce noticeable electrical signal changes in bright environments. They are often used in scenarios requiring detection of high light brightness. They are also called white (W) sensors, abbreviated as W.

[0058] Dark-state sensors are more sensitive to weaker light intensities and can produce more obvious electrical signal changes in low-light or dark environments. They are often used in scenes that require detection of low light brightness. They are also called dark (W)-state sensors, abbreviated as D.

[0059] Phototransistor: A semiconductor device sensitive to light signals that converts them into electrical signals (e.g., leakage current). These devices primarily include photodiodes and phototransistors. Phototransistors are commonly used in ALSs to reliably sense ambient light brightness. Generally, the brighter the light, the greater the leakage current output by the phototransistor.

[0060] Switching transistor: A semiconductor device used to control the on / off state of a circuit. It primarily controls the flow of current between the collector and emitter (for transistors) or the drain and source (for field-effect transistors) by applying an electrical signal to the base (for transistors) or gate (for field-effect transistors). Field-effect transistors (FETs) include thin-film transistors (TFTs) or metal-oxide-semiconductor (MOS) field-effect transistors, also known as MOS transistors.

[0061] Furthermore, photosensitive transistors and switching transistors typically include P-type transistors and N-type transistors. A P-type transistor turns on when it receives a low, valid potential and turns off when it receives a high, invalid potential. An N-type transistor turns on when it receives a high, valid potential and turns off when it receives a low, invalid potential. The terms high and low are relative and represent a potential state, not a potential magnitude.

[0062] In response to the problem that most current small-sized display modules cannot adaptively adjust the display brightness based on the brightness of the ambient light, that is, products without automatic screen brightness adjustment function, the embodiments of the present application provide a new display module. The ALS in this display module is optimized so that the ALS can be integrated into the display panel without the need to open a hole in the front of the screen to accommodate the ALS. This ensures a full screen while also achieving adaptive display brightness adjustment, which is particularly suitable for display modules of smaller wearable devices.

[0063] Figure 1 This is a schematic diagram of the structure of a display module provided in an embodiment of the present application. Figure 1 As shown, the display module includes: a display panel 01, a plurality of light emitting elements L1, at least two sets of ambient light sensors ALS, and a brightness control circuit 02. For example, Figure 1 Schematically showing n groups of ALSs, which are labeled ALS1 to ALSn, where n is an integer greater than 1. And, taking ALS1 as an example, Figure 1 The circuit diagram of each ALS group is also shown. Figure 1 It can be seen that:

[0064] The display panel 01 has a display area AA and a peripheral area BB at least partially surrounding the display area AA.

[0065] For example, reference Figure 1 In the display panel 01 shown therein, the peripheral area BB surrounds the display area AA and is located on each side of the display area AA, and the display area AA is rectangular. Of course, the area positions and shapes here are schematic illustrations. It can be understood that the display area AA is the area that can display the image, and the peripheral area BB can refer to the non-display area that cannot display the image. Generally, in order to achieve a full screen as much as possible, the display area AA occupies a larger area, while the peripheral area BB occupies a smaller area.

[0066] The plurality of light emitting elements L1 are located in the display area AA. It is understood that when the plurality of light emitting elements L1 emit light, the display area AA can perform display.

[0067] Optionally, the plurality of light emitting elements L1 may be as follows Figure 1As shown, the array is arranged in the display area AA, that is, the display panel can include multiple rows and columns of light-emitting elements L1. Moreover, the display module can be a liquid crystal display (LCD), and each light-emitting element L1 can be a light-emitting diode (LED) used in LCD. In LCD, LED is usually used as a backlight source. Accordingly, the luminance of the light-emitting element L1 is also called the backlight brightness. Of course, the arrangement and type of the light-emitting elements here are schematic illustrations.

[0068] At least two sets of ambient light sensors ALS are located in the peripheral area BB. Each set of ambient light sensors ALS includes a bright-state sensor ALS-W and a dark-state sensor ALS-D connected in parallel. Both the bright-state sensor ALS-W and the dark-state sensor ALS-D include multiple photosensitive transistors (e.g., photosensitive TFTs) T1 connected in parallel.

[0069] That is, in the embodiment of the present application, multiple groups of ambient light sensors ALS can be integrated on the display panel 01 to sense the brightness of light, so as to achieve adaptive adjustment of the display brightness. In this way, there is no need for an external ALS, nor is there a need to open a hole on the front of the screen to set up the ALS, which can be beneficial to the design of a full screen. Moreover, each group of ambient light sensors ALS includes not only a bright state sensor ALS-W that can sense stronger light, but also a dark state sensor ALS-D that can sense weaker light, and the range of light intensity that can be sensed is relatively comprehensive. In addition, each group of ambient light sensors ALS includes each photosensitive transistor T1 connected in parallel. Through this parallel optimization, not only can the problem of a single photosensitive transistor T1 being unable to meet the requirements of the size and accuracy of the collected leakage current be solved, but also the size of the ambient light sensor ALS can be reduced as much as possible, making it easier for the ambient light sensor ALS to be integrated on the display panel.

[0070] For example, in Figure 1 Based on this, taking a small-sized wearable device with a display module of about 2 inches as an example, Figure 2 The figure shows the size design of a set of ALS1 integrated on the display module. Figure 2 It can be seen that through parallel optimization, the length of each set of ALS can be shortened to 50% of the conventional length or even smaller. For example, the length L of each set of ALS can be optimized to about 1.75 millimeters (mm), and the width W can be optimized to about 0.03585 mm. In mainstream wearable devices of about 2 inches, the width WW of the ultra-narrow frame is generally about 0.6 mm, and the length LL is generally about tens of mm. It can be seen that each set of ALS after optimization can be placed in the display panel. Of course, the dimensions here are only schematic illustrations. In addition, Figure 2The diagram also schematically shows the length LL between ALS1 and the edge of the display panel 01, which is approximately 15.5422 mm. The edge of the display area AA and the edge of the TFT are also marked.

[0071] Optionally, in an embodiment of the present application, the dark state sensor ALS-D may further include: a light shielding layer covering the plurality of photosensitive transistors T1 connected in parallel, so as to achieve the purpose of detecting weaker light intensities. The light shielding layer may be, for example, a black matrix layer (BM) with low light transmittance. The bright state sensor ALS-W may not include the light shielding layer (e.g., BM). Accordingly, as previously described, the bright state sensor ALS-W has no additional obstruction to the reception of light and will receive more various types of light; while the dark state sensor ALS-D is blocked by a light shielding layer similar to BM, so the reception of certain specific light (e.g., backlight) is limited. On this basis, the dark state sensor ALS-D can serve as a control group for the bright state sensor ALS-W to eliminate the influence of some interference factors similar to backlight on the sensing of ambient light, thereby ensuring more reliable sensing of ambient light. For example, when the bright-state sensor ALS-W senses an abnormality in ambient light without being covered by BM, it can be compared with the ambient light sensed by the dark-state sensor ALS-D, which is basically unaffected by backlight interference factors, to more accurately determine whether the abnormality is caused by factors other than interference factors such as backlight, or is affected by interference factors such as backlight.

[0072] The brightness control circuit 02 is electrically connected to the at least two sets of ambient light sensors ALS and the plurality of light-emitting elements L1. Furthermore, the brightness control circuit 02 is configured to transmit a light-sensing control signal to the at least two sets of ambient light sensors ALS, receive light brightness sensing signals transmitted by the at least two sets of ambient light sensors ALS in response to the light-sensing control signal, and control the brightness of the plurality of light-emitting elements L1 based on the light brightness sensing signal transmitted by the at least one set of ambient light sensors ALS.

[0073] That is, in the embodiment of the present application, when adaptive display brightness adjustment is required, the brightness control circuit 02 can first transmit a light-sensing control signal to each set of ambient light sensors ALS, so that the ambient light sensors ALS reliably sense light intensity under the control of the light-sensing control signal and output an electrical signal (e.g., leakage current) reflecting the light intensity as a light brightness sensing signal. On this basis, the brightness control circuit 02 can then calculate a light brightness value based on the light brightness sensing signal transmitted by at least one set of ambient light sensors ALS, and flexibly control the light brightness of the multiple light-emitting elements L1 based on the calculated light brightness value, thereby achieving the purpose of adaptive display brightness adjustment, so that the display brightness can change with changes in light intensity.

[0074] Generally, a larger light brightness sensing signal corresponds to a larger light brightness value, i.e., a stronger light brightness; a smaller light brightness sensing signal corresponds to a smaller light brightness value, i.e., a weaker light brightness. Furthermore, the larger the light brightness value, the brighter the brightness of light-emitting element L1 can be controlled by brightness control circuit 02; conversely, the smaller the light brightness value, the dimmer the brightness of light-emitting element L1 can be controlled by brightness control circuit 02.

[0075] In summary, embodiments of the present application provide a display module. This display module includes multiple light-emitting elements and multiple sets of ambient light sensors located on a display panel. Each set of ambient light sensors includes multiple photosensitive transistors connected in parallel. These sensors output a light brightness sensing signal reflecting the brightness level under the control of a photosensitive control signal transmitted by a brightness control circuit. The brightness control circuit then automatically controls the brightness of the multiple light-emitting elements based on the light brightness sensing signal. This enables adaptive adjustment of display brightness.

[0076] Optionally, Figure 3 This is a schematic diagram of the structure of another display module provided in an embodiment of the present application. Figure 3 As shown, the brightness control circuit 02 may include: a display driver chip 021 and a light-emitting driver circuit 022 .

[0077] Optionally, when the display module is a touch-sensitive display module, the display driver chip 021 may be, for example, a touch display driver integration circuit (TDDIIC). When the light-emitting element L1 is an LED, the light-emitting driver circuit 022 may be, for example, an LED driver chip (LEDDriver). The following embodiments are described using an example in which the display driver chip 021 is a TDDIIC and the light-emitting driver circuit 022 is an LED Driver.

[0078] The display driver chip 021 can be connected to at least two sets of ambient light sensors ALS. Furthermore, the display driver chip 021 can be configured to transmit a light sensing control signal to the at least two sets of ambient light sensors ALS, receive light brightness sensing signals transmitted by the at least two sets of ambient light sensors ALS in response to the light sensing control signal, and convert the light brightness sensing signals transmitted by the at least one set of ambient light sensors ALS into light brightness values.

[0079] Different light brightness values ​​correspond to different light driving signals. That is, each light brightness value may correspond to a light driving signal, and different light brightness values ​​may correspond to different light driving signals. Of course, in other embodiments, a range of light brightness values ​​may correspond to a light driving signal. This embodiment of the present application is not limited to this.

[0080] Optionally, in Figure 1 Based on this, take a group of ALS1 as an example and continue to refer to Figure 4 As can be seen, the display driver chip 021 can be connected to the source (S) and drain (drain) of the multiple photosensitive transistors T1 connected in parallel in each set of ambient light sensors ALS. It can be used to transmit light sensing control signals to the sources of the multiple photosensitive transistors T1 and receive light brightness sensing signals transmitted from the drains of the multiple photosensitive transistors T1. In the figure, the drain of the dark-state sensor ALS-D in each set of ALS is labeled D, and the drain of the light-state sensor ALS-W is labeled W.

[0081] Alternatively, the light-sensing control signal may be, for example, a square wave (i.e., a periodic, non-sinusoidal signal). The gate (G) of each photosensitive transistor T1 may receive a control signal having a constant potential (e.g., 0 volts V). By transmitting the light-sensing control signal to the source of each photosensitive transistor T1, the gate-source voltage difference of each photosensitive transistor T1 may be controlled, thereby controlling each photosensitive transistor T1 to turn on to sense ambient light and output a light brightness sensing signal. Generally, a transistor may turn on when the absolute value of the gate-source voltage difference of the transistor is greater than the threshold voltage of the transistor.

[0082] Of course, the display driver chip 021 can also be connected to the gate of the photosensitive transistor T1 to transmit the required control signal to the gate of the photosensitive transistor T1. Alternatively, the gate of the photosensitive transistor T1 can also be connected to other control ICs to receive control signals provided by other control ICs.

[0083] Furthermore, it is understandable that, as previously described, the light brightness sensing signal output by the photosensitive transistor T1 is generally a current signal. On this basis, in an embodiment of the present application, a sampling resistor may be further provided between the drain of the photosensitive transistor T1 and the display driver chip 021 to convert the current signal into a voltage signal through the sampling resistor, and the voltage signal is generally an analog signal. Since the signal processed by the display driver chip 021 is generally a digital signal, in an embodiment of the present application, an analog to digital converter (ADC) may be further provided between the sampling resistor and the display driver chip 021 to convert the voltage value of the analog signal into the voltage value of the digital signal before transmitting it to the display driver chip 021. Of course, the sampling resistor and the ADC may also be integrated into the display driver chip 021 as part of the display driver chip 021.

[0084] Optionally, the voltage signal acquired by the display driver chip 021 can be referred to as raw data (rawdata) converted from the current signal. The display driver chip 021 can then convert the rawdata into a light brightness value, or ambient light intensity, using an internal ALS algorithm. The ALS algorithm refers to a series of calculation methods and steps used to process ALS output data to achieve specific functions, such as light brightness detection.

[0085] The light driving circuit 022 can be connected to the plurality of light emitting elements L1 and can be used to drive the plurality of light emitting elements L1 to emit light based on a light driving signal corresponding to the light brightness value, so as to control the light brightness of the plurality of light emitting elements L1.

[0086] For example, the light driving circuit 022 may transmit a light control signal to the plurality of light emitting elements L1 under the control of the light driving signal, so as to light up the plurality of light emitting elements L1 .

[0087] Optionally, the light-emitting drive signal can be, for example, a pulse width modulation (PWM) signal. Furthermore, the amplitude and / or duty cycle of different PWM signals can be different. The amplitude is the voltage or current value of the PWM signal when it is in a high-level state. The duty cycle is the ratio of the duration of the high-level state to the duration of the entire cycle within a switching cycle. In this way, different PWM signals can be selected based on different light brightness values ​​to adjust the light brightness of multiple light-emitting elements L1 to different levels.

[0088] Next, the method of determining the light driving signal based on the light brightness value is described as follows:

[0089] (1) As an optional implementation:

[0090] The display driver chip 021 can also be used to connect to the client HOST (or host), and can be used to transmit the determined light brightness value to the client HOST, so that the client HOST can determine the light driving signal corresponding to the light brightness value, and transmit the light driving signal to the connected light driving circuit 022.

[0091] That is, in this optional implementation, the display driver chip 021 can be solely responsible for collecting the leakage current transmitted by the ALS and converting it into raw data. This raw data is then converted into a light brightness value using the ALS algorithm and sent to the host. Accordingly, the host needs to be equipped with a microcontroller unit (MCU) or a system on chip (SOC) to receive the light brightness value output by the display driver chip 021. Furthermore, the host needs to pre-store different light drive signals corresponding to different light brightness values, as well as a calculation algorithm (e.g., interpolation) for converting light brightness values ​​into light drive signals. After receiving the light brightness value, the host can search for the corresponding light drive signal based on the light brightness value. If the received light brightness value is not pre-stored, the host can also calculate the corresponding light drive signal using an algorithm. The host can then feed the determined light drive signal back to the light drive circuit 022, so that the light drive circuit 022 can control the light emitting element L1 to emit light.

[0092] Optionally, the correspondence between different light brightness values ​​and different light driving signals can be stored in the form of a look-up table, and the correspondence can be a value that enables the screen to achieve a better display effect after testing the screen under different known ambient light intensity conditions.

[0093] (2) As another optional implementation:

[0094] Combine Figure 3 The display driver chip 021 can also be connected to the light-emitting driver circuit 022. The display driver chip 021 can also be used to: determine the light-emitting drive signal corresponding to the light brightness value, and transmit the light-emitting drive signal to the light-emitting driver circuit 022.

[0095] That is, in this alternative implementation, the function of the host determining the light drive signal based on the light brightness value in implementation (1) can be integrated into the display driver chip (e.g., TDDIIC) 021. After determining the light brightness value, the display driver chip 021 further determines the light drive signal corresponding to the light brightness value and directly outputs the required light drive signal to the light drive circuit 022. In this way, the host does not need an external MCU or SOC to receive the light brightness value and determine the light drive signal. This reduces the complexity of the host configuration and saves host computing power and space.

[0096] Optionally, continue to refer to Figure 5It can be seen that the display driver chip 021 may also be externally equipped with a flash memory Flash, and the display driver chip 021 may establish a communication connection with the flash memory Flash. The communication connection may be established using, for example, a synchronous serial communication bus I2C. Figure 5 Only one photosensitive transistor T1 is schematically shown.

[0097] In the case where the display driver chip 021 is used to determine the light driving signal corresponding to the light brightness value, that is, in the case of the above-mentioned implementation method (2), different light driving signals corresponding to different brightness values ​​can be stored in the flash memory Flash in the form of a lookup table for the display driver chip 021 to call. Of course, the calculation algorithm of the light driving signal can also be stored in the flash memory Flash for the display driver chip 021 to call. That is, after the display driver chip 021 determines the light brightness value using the ALS algorithm, it can exchange data with the flash memory Flash through the I2C bus to obtain the required signal or calculation algorithm to reliably determine the light driving signal corresponding to the light brightness value.

[0098] Optionally, the flash memory can be reused to store touch-related firmware (touch fw) to save cost and space.

[0099] It is understandable that implementation (2) is mostly used in wearable devices that require fewer brightness adjustment levels (e.g., 3 to 5 levels). Here, the level refers to the division of brightness into several different levels, each corresponding to a different brightness value. For example, level 1 may be the lowest brightness, level 5 is the highest brightness, and level 3 is at a medium to high brightness level.

[0100] Optionally, in an embodiment of the present application, the display module includes at least two sets of ambient light sensors (ALSs). These sets can be configured to alternately and intermittently transmit light brightness sensing signals based on a light-sensing control signal. That is, each adjacent set of ALSs can alternately report light brightness sensing signals to the brightness control circuit 02, one after the other, for the brightness control circuit 02 to adjust the brightness of the light-emitting element L1. This allows for multiple continuous readings of data feedback, providing more accurate feedback of the sensed light brightness to the brightness control circuit 02, enabling the brightness control circuit 02 to reliably adjust the display brightness.

[0101] For example, combined with Figure 6Taking the display module shown as an example, including two sets of ambient light sensors (ALS), it is assumed that within each 100 millisecond (ms) acquisition frame, each ALS collects 20 sets of data (i.e., light brightness sensing signals) for 40ms, leaving the remaining 60ms for the brightness control circuit 02 to calculate and wait for the arrival of the next frame. Among the 20 sets of data, several sets of abnormal data are generally discarded, meaning that each ALS can collect approximately 15 sets of data within each acquisition frame. Thus, by setting up two sets of ambient light sensors (ALS) to alternately collect and report light brightness sensing signals, 30 sets of data can be collected, achieving twice the continuous reading data feedback.

[0102] It is understandable that, in order to distinguish, Figure 6 The two groups of ALS are labeled ALS1 and ALS2, and the gate, source and drain of the photosensitive transistor T1 in ALS1 are labeled G1, S1, D1 / W1, respectively; the gate, source and drain of the photosensitive transistor T1 in ALS2 are labeled G2, S2, D2 / W2, respectively.

[0103] Optionally, based on the above embodiment, continue to refer to Figure 7 It can be seen that the display module described in the embodiment of the present application can also include: at least two switching transistors T2 (e.g., switching MOS transistors) corresponding to at least two groups of ambient light sensors ALS. In other words, a switching transistor T2 can be provided for each group of ALS, and different switching transistors T2 can be provided for different groups of ALS.

[0104] For example, reference Figure 7 , which schematically shows two groups of ALS1 and ALS2. Accordingly, the display module may further include: two switching transistors T2 connected to the two groups of ALS1 and ALS2 in a one-to-one correspondence. Figure 7 Only one photosensitive transistor T1 included in each ALS group is schematically shown.

[0105] Each switching transistor T2 can be connected between the brightness control circuit 02 (here, the display driver chip 021 included in the brightness control circuit 02, such as a TDDI IC) and a corresponding set of ambient light sensors ALS. Each switching transistor T2 can be used to receive a switching control signal and, in response to the switching control signal, control the connection and disconnection between the brightness control circuit 02 and the corresponding set of ambient light sensors ALS.

[0106] For example, in Figure 7 Combined with the basic Figure 8It can be seen that the gate G01 of each switching transistor T2 can be used to receive a switching control signal, the source S01 of each switching transistor T2 can be connected to the display driver chip 021, and the drain D01 of each switching transistor T2 can be connected to a corresponding set of ALSs. In combination with the connection method between the display driver chip 021 and the ALS described above, it can be seen that the drain of each switching transistor T2 here can be connected to the source S of the photosensitive transistor T1 in the ALS (for example, the source S1 of the photosensitive transistor T1 in ALS1). In addition, Figure 8 The figure also schematically shows the Flash external to the display driver chip 021 .

[0107] Optionally, combined Figure 8 It can also be seen that the gate G01 of each switching transistor T2 can also be connected to the TDDI IC to receive the switching control signal provided by the TDDI IC. Accordingly, it can be seen that the switching control signal can come from the TDDI IC. Of course, in some other embodiments, the gate G01 of the switching transistor T2 can also be connected to another switching control IC to receive the switching control signal provided by the other switching control IC. The embodiment of the present application does not limit the source of the switching control signal.

[0108] Among them, the potential of the switch control signal is an effective potential, which can be used to control the brightness control circuit 02 to be connected with a corresponding group of ambient light sensors ALS, so that the photosensitivity control signal provided by the ambient light sensor ALS is transmitted to the ambient light sensor ALS. The potential of the switch control signal is an invalid potential, which can be used to control the brightness control circuit 02 to be disconnected from the corresponding group of ambient light sensors ALS.

[0109] For example, combined with Figure 8 When the potential of the switch control signal is a valid potential, the switch transistor T2 can be turned on, and the source and drain of the switch transistor T2 can be turned on, thereby connecting the TDDIIC to the source of the photosensitive transistor T1 in the ALS, so that the TDDIIC can output a light-sensing control signal to the source of the photosensitive transistor T1 in the ALS, controlling the photosensitive transistor T1 to turn on to sense light brightness and output a light brightness sensing signal. When the potential of the switch control signal is an invalid potential, the switch transistor T2 can be turned off, and the source and drain of the switch transistor T2 can be disconnected, thereby disconnecting the TDDI IC from the source of the photosensitive transistor T1 in the ALS, so that the TDDIIC cannot output the light-sensing control signal to the source of the photosensitive transistor T1 in the ALS. At this time, the photosensitive transistor T1 cannot turn on to sense light brightness, and thus cannot output a light brightness sensing signal.

[0110] Accordingly, in at least two switch transistors T2 , there can be an interval between the effective potentials of the switch control signals received by any two switch transistors T2 , so that at least two groups of ambient light sensors ALS transmit light brightness sensing signals alternately and intermittently based on the photosensitivity control signal.

[0111] It can be understood that, on the basis of setting the effective potential of the switch control signal received by the two switching transistors T2 to have an interval, the turn-on time of the two switching transistors T2 can be spaced. Furthermore, the time for the photosensitivity control signal (such as a square wave) transmitted by TDDIIC to the two groups of ALS can be spaced. Accordingly, there is an interval in the time for the two groups of ALS corresponding to the two switching transistors T2 to sense the brightness of light, which ultimately ensures that the two groups of ambient light sensors ALS can alternately and intermittently transmit light brightness sensing signals based on the photosensitivity control signal. That is, the switching transistor T2 can be added to control the time for TDDIIC to output the square wave.

[0112] Optionally, the display module may further include a flexible printed circuit (FPC) and an array substrate (Array). At least two switching transistors T2 may be located on the array substrate (Array) or on the flexible printed circuit (FPC). The array substrate (Array) is generally also provided with a driving transistor that switches under the control of the light-emitting driving circuit 022, thereby driving the light-emitting element L1 to emit light.

[0113] Optionally, the at least two switching transistors T2 may be of the same type or of different types. The type here refers to a P-type transistor or an N-type transistor. Furthermore, as previously mentioned, the effective potential corresponding to a P-type transistor is a low potential, while the effective potential corresponding to an N-type transistor is a high potential.

[0114] Optionally, combined Figure 6 and Figure 7 The display module described in the embodiment of the present application may include: two sets of ambient light sensors ALS, and two switching transistors T2 corresponding to the two sets of ambient light sensors ALS, and the interval between the two sets of ambient light sensors ALS transmitting light brightness sensing signals may be 50ms. Based on this, taking the switching transistor T2 corresponding to ALS1 as an N-type transistor and the switching transistor T2 corresponding to ALS2 as a P-type transistor as an example, Figure 9 A control timing diagram is schematically shown.

[0115] Combine Figure 9It can be seen that first, a switch control signal with an effective potential (i.e., a high potential VGH) can be output to the switch transistor T2 corresponding to ALS1, so that the switch transistor T2 corresponding to ALS1 is turned on, and then the TDDIIC transmits a light-sensing control signal to the photosensitive transistor T1 in ALS1, controls the photosensitive transistor T1 in ALS1 to turn on and sense the light brightness, and outputs a light brightness sensing signal. Then, after an interval of 50ms, a switch control signal with an effective potential (i.e., a low potential VGL) can be output to the switch transistor T2 corresponding to ALS2, so that the switch transistor T2 corresponding to ALS2 is turned on, and then the TDDIIC transmits a light-sensing control signal to the photosensitive transistor T1 in ALS2, controls the photosensitive transistor T1 in ALS2 to turn on and sense the light brightness, and outputs a light brightness sensing signal. In this way, alternating detection of dual ALS is achieved.

[0116] In addition, based on the setting of the switch transistor T2, when the screen is off, the switch control signal of invalid potential is output to the switch transistor T2 corresponding to each group of ALS to control the switch transistor T2 corresponding to each group of ALS to turn off, so that the photosensitive transistor T1 in each group of ALS is turned off and stops sensing the light brightness and stops outputting the light brightness sensing signal. Figure 9 Both waveforms in the figure are pulled to 0 V. This can save computing power and reduce the power consumption of the entire machine caused by ALS.

[0117] Optionally, the brightness control circuit 02 (herein, it may refer to the TDDIIC therein) may also be used for:

[0118] When the difference between the light brightness sensing signals transmitted by the two sets of ambient light sensors ALS is less than the difference threshold, the light brightness of the plurality of light emitting elements L1 is controlled based on the light brightness sensing signals transmitted by the two sets of ambient light sensors ALS.

[0119] When the difference between the light brightness sensing signals transmitted by the two groups of ambient light sensors ALS is greater than or equal to a difference threshold, the luminous brightness of multiple light-emitting elements L1 is controlled based on the light brightness sensing signal transmitted by one of the groups of ambient light sensors ALS, where one group of ambient light sensors ALS is the group of ambient light sensors ALS that transmits a relatively larger light brightness sensing signal among the two groups of ambient light sensors ALS.

[0120] That is, on the basis of applying the two-group ALS solution, the display driver chip 021 can also refer to the difference threshold to detect whether the light brightness sensing signals transmitted by the two groups of ALS are significantly different. Assuming that the light brightness sensing signal transmitted by one group of ALS drops sharply due to the ALS being covered or having problems, and there is a large difference between it and the light brightness sensing signal transmitted by the other group of ALS, the display driver chip 021 can determine that a false detection has occurred. At this time, the display driver chip 021 can control the luminous brightness of the light-emitting element L1 based only on the relatively large light brightness sensing signal, that is, using a single ALS mode to adjust the brightness. When the light brightness sensing signals transmitted by the two groups of ALS are basically the same, the display driver chip 021 can restart the dual ALS mode to adjust the brightness, that is, control the luminous brightness of multiple light-emitting elements L1 based on the light brightness sensing signals transmitted by the two groups of ambient light sensors ALS, which is also called using a dual ALS mode to adjust the brightness. Optionally, the difference threshold can be pre-stored in the display driver chip 021, and of course it can also be flexibly adjusted.

[0121] Furthermore, it is understood that the display driver chip 021 can detect the digital voltage signal converted from the leakage current, which is the rawdata described above. For sudden drops in rawdata, the display driver chip 021 can simply collect the rawdata and compare it with the larger rawdata, without using the ALS algorithm to calculate the light brightness value or any subsequent actions. This not only prevents false detections but also reduces algorithm waste when a single ALS is obscured or has issues.

[0122] Optionally, combined Figure 10 In the display module described in the embodiments of the present application, the peripheral area BB may surround the display area AA, and the peripheral area BB may include: a first peripheral area BB1 and a second peripheral area BB2 located on opposite sides of the display area AA in the first direction X1. That is, the peripheral area BB includes: two peripheral areas located on the upper and lower sides of the display area AA. Of course, based on the fact that the peripheral area BB surrounds the display area AA, it can also be seen that, in addition to the two peripheral areas located on the upper and lower sides of the display area AA, the peripheral area BB actually also includes: two other peripheral areas located on the left and right sides of the display area AA. These other two peripheral areas can be considered to be located on opposite sides of the display area AA in the second direction X2. Among them, the second peripheral area BB2 can also be called the driver output (DO) side of the display module.

[0123] The first direction X1 and the second direction X2 may intersect. Figure 10 Furthermore, based on the array arrangement of the plurality of light emitting elements L1, the first direction X1 may refer to a row direction, and the second direction X2 may refer to a column direction.

[0124] Based on the above regional division, the following examples illustrate the location of each part:

[0125] The display driver chip (eg, TDDI IC) 021 may be located in the first peripheral area BB1. Accordingly, the first peripheral area BB1 may also be referred to as the IC side.

[0126] In the case where the display module includes two sets of ambient light sensors ALS1 and ALS2, such as Figure 10 As shown, both sets of ambient light sensors ALS1 and ALS2 can be located at the center of the second peripheral area BB2. That is, both sets of ALS can be located on the DO side and centered. This ensures that both sets of ALS1 and ALS2 collect light brightness from the same area, with good uniformity. This area can also receive ambient light directly facing the display module and is mostly used for front-facing handheld wearable products. It is understood that the center of the second peripheral area BB2 refers to the position where the second peripheral area BB2 is equidistant from the left and right edges, and equidistant from the upper and lower edges.

[0127] Or, as Figure 11 As shown, one set of ambient light sensors ALS1 can be located in the center of the second peripheral area BB2, and another set of ambient light sensors ALS2 can be located in the first peripheral area BB1 and can be located on either side of the display driver chip 021 in the second direction X2. Figure 11 , one group of ALS1 can be located on the DO side and centered, and another group of ambient light sensors ALS2 can be located on the IC side and near the left side of the display driver chip 021. Or, combined Figure 12 , one set of ALS1 can be located on the DO side and centered, and the other set of ambient light sensors ALS2 can be located on the IC side and near the right side of the display driver chip 021. In this way, the two sets of ALS1 and ALS2 can collect light brightness from different areas, and the collection range is more comprehensive.

[0128] It is understood that for a set of ALS2 located near the display driver chip 021, it can be combined with wearable products that are mostly worn on the user's wrist. Since this area is easily blocked by other objects or clothing cuffs, the ASL2 for products worn on the left hand can be placed on the right, and the ASL2 for products worn on the right hand can be placed on the left. This reduces the probability of the ALS being blocked, thereby reducing the probability of false detection. In addition, it is also understood that by placing the ALS close to the display driver chip 021, the wiring impedance can be reduced, thereby further optimizing the number of parallel photosensitive transistors T1 and achieving the smallest possible ALS size. The wiring here refers to the wiring connecting the display driver chip 021 to the ALS.

[0129] Optionally, combined Figure 10 and the aforementioned Figure 6 It can also be seen that when both sets of ambient light sensors ALS are located in the center of the second peripheral area BB, along the second direction X2, the dark-state sensors ALS-D and bright-state sensors ALS-W included in one set of ambient light sensors ALS can be arranged in sequence with the bright-state sensors ALS-W and dark-state sensors ALS-D included in the other set of ambient light sensors ALS. That is, in the two sets of ALS located in the second peripheral area BB2, the two dark-state sensors ALS-D can be adjacent to each other, and the two bright-state sensors ALS-W can be located on either side of the two dark-state sensors ALS-D. The two sets of ALS can be arranged adjacent to each other in a DWWD manner.

[0130] It is understandable that because the data collected by the bright state sensor ALS-W is large in magnitude, there is a problem of data difference due to the long distance, while the dark state sensor ALS-D is blocked by a light-shielding layer (such as BM), so the collected data is small in magnitude, and there is no problem of data difference due to the long distance. Therefore, by adopting the DWWD arrangement, not only can a compact arrangement be achieved, which is conducive to narrow frame design, but also the data difference caused by differences can be reduced.

[0131] It can also be understood that, combined with the previous records, when ALS is set on both the DO side and the IC side, the two groups of ALS can serve as control groups for each other, allowing the display driver chip 021 to detect the difference in rawdata collected by the two, and flexibly select single ALS mode to adjust the brightness or dual ALS mode to adjust the brightness according to the difference, which can reduce the probability of false detection and ensure more accurate brightness detection.

[0132] Of course, in the case where the display module includes a set of ambient light sensors ALS, such as Figure 13 As shown, the set of ambient light sensors ALS can be located at the center of the second peripheral area BB2. That is, the set of ALS can be located on the DO side and centered. Or, as Figure 14 As shown, the set of ambient light sensors ALS can be located in the first peripheral area BB1 and on the right side of the display driver chip 021 in the second direction X2. That is, the set of ALS can be located on the IC side and near the right side of the display driver chip 021. Or, as Figure 15 As shown, the set of ambient light sensors ALS may be located in the first peripheral area BB1 and on the left side of the display driver chip 021 in the second direction X2. That is, the set of ALS may be located on the IC side and near the left side of the display driver chip 021.

[0133] Based on the above description, compared with the small-sized wearable devices on the market that do not have the automatic screen brightness adjustment function, the display module provided by the embodiment of the present application: on the one hand, two or more groups of ALS are integrated on the display panel to achieve accurate brightness sensing, thereby realizing automatic screen brightness adjustment. This not only does not require a hole in the front of the screen, but also facilitates full-screen design. On the other hand, each group of ALS is provided to include multiple photosensitive transistors in parallel, and a small-size design is performed, which is easy to integrate and saves the cost of external ALS. On the other hand, based on the scheme of setting two groups of ALS, switching transistors are added so that the two groups of ALS alternately sense the brightness of light and output light brightness sensing signals. This increases the amount of brightness data that can be collected by the display driver chip, thereby achieving the purpose of more accurate adjustment of the screen brightness. In this scheme, the two groups of ALS can be arranged in a DWWD manner. On the other hand, based on the scheme of setting two groups of ALS, the data output by the two groups of ALS are compared to reduce the probability of false detection, and computing power is saved and power consumption is reduced. Furthermore, various ALS placements have been designed to accommodate wearable device wearing styles, reducing the likelihood of erroneous data feedback due to ALS obstruction. These various aspects can be combined arbitrarily to create customized solutions tailored to user needs and wearable requirements, allowing for the design of modules that meet specific specifications.

[0134] In summary, embodiments of the present application provide a display module. This display module includes multiple light-emitting elements and multiple sets of ambient light sensors located on a display panel. Each set of ambient light sensors includes multiple photosensitive transistors connected in parallel. These sensors output a light brightness sensing signal reflecting the brightness level under the control of a photosensitive control signal transmitted by a brightness control circuit. The brightness control circuit then automatically controls the brightness of the multiple light-emitting elements based on the light brightness sensing signal. This enables adaptive adjustment of display brightness.

[0135] The present application also provides a display device. Figure 16 As shown, the display device includes: a power supply 10 and the display module 00 as described above.

[0136] The power supply 10 is connected to the display module and is used to supply power to the display module.

[0137] Optionally, the display device is a wearable device. Of course, it can also include but is not limited to any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, and an e-book.

[0138] It is understandable that since the display device can have substantially the same technical effects as the display module described in the previous embodiment, the technical effects of the display device will not be repeatedly described here for the purpose of brevity.

[0139] It should be noted that the terms used in the examples of this application are only used to explain the examples and are not intended to limit this application. Unless otherwise defined, technical terms or scientific terms used in the embodiments of this application should have the common meanings understood by people with ordinary skills in the field to which this application belongs.

[0140] For example, the terms "first," "second," or "third," and similar terms used in the patent specification and claims of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "a" or "an" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Terms such as "include" or "comprises" mean that the elements or objects preceding "include" or "comprises" include the elements or objects listed after "include" or "comprises," and their equivalents, and do not exclude other elements or objects. Terms such as "upper," "lower," "left," or "right" are used only to indicate relative positional relationships. When the absolute position of the described objects changes, the relative positional relationship may also change accordingly. "Connected" or "coupled" refers to an electrical connection. "And / or" indicates that three possible relationships can exist. For example, "A and / or B" can mean: A exists alone, A and B exists simultaneously, or B exists alone. The character " / " generally indicates that the objects in the preceding and following relationship are in an "or" relationship.

[0141] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display module, characterized in that: The display module includes: A display panel having a display area and a peripheral area at least partially surrounding the display area; A plurality of light-emitting elements are located in the display area; At least two groups of ambient light sensors are located in the peripheral area, each group of the ambient light sensors includes: a bright state sensor and a dark state sensor connected in parallel, and each of the bright state sensor and the dark state sensor includes: a plurality of photosensitive transistors connected in parallel; a brightness control circuit, electrically connected to the at least two groups of ambient light sensors and the plurality of light-emitting elements, respectively, and configured to: transmit a light-sensing control signal to the at least two groups of ambient light sensors, receive light brightness sensing signals transmitted by the at least two groups of ambient light sensors in response to the light-sensing control signal, and control the light brightness of the plurality of light-emitting elements based on the light brightness sensing signal transmitted by at least one group of the ambient light sensors; The brightness control circuit includes: a display driver chip and a light-emitting driver circuit; the display driver chip is connected to the at least two groups of ambient light sensors and is used to transmit the light-sensing control signal to the at least two groups of ambient light sensors, receive the light brightness sensing signals transmitted by the at least two groups of ambient light sensors in response to the light-sensing control signal, and convert the light brightness sensing signals transmitted by at least one group of the ambient light sensors into light brightness values; wherein different light brightness values ​​correspond to different light-emitting drive signals; the light-emitting driver circuit is connected to the multiple light-emitting elements and is used to drive the multiple light-emitting elements to emit light based on the light-emitting drive signals corresponding to the light brightness values, so as to control the light brightness of the multiple light-emitting elements; Furthermore, the display driver chip is also used to connect to a client and transmit the determined light brightness value to the client, so that the client can determine a light driving signal corresponding to the light brightness value and transmit the light driving signal to the connected light driving circuit.

2. The display module according to claim 1, wherein: The at least two groups of ambient light sensors are used to transmit the light brightness sensing signal alternately and intermittently based on the light sensing control signal.

3. The display module according to claim 2, wherein: The display module further includes: at least two switching transistors corresponding one-to-one to the at least two groups of ambient light sensors, each of the switching transistors being connected between the brightness control circuit and a corresponding group of the ambient light sensors, and each of the switching transistors being configured to: receive a switching control signal and, in response to the switching control signal, control the on / off connection between the brightness control circuit and the corresponding group of the ambient light sensors; The potential of the switch control signal is an effective potential used to control the brightness control circuit to communicate with the corresponding group of ambient light sensors, so that the light sensing control signal provided by the ambient light sensor is transmitted to the ambient light sensor; the potential of the switch control signal is an invalid potential used to control the brightness control circuit to disconnect from the corresponding group of ambient light sensors; Furthermore, among the at least two switching transistors, there is an interval between the effective potentials of the switching control signals received by any two of the switching transistors, so that the at least two groups of ambient light sensors transmit the light brightness sensing signals alternately and intermittently based on the photosensitivity control signal.

4. The display module according to claim 3, wherein: The display module includes: two groups of ambient light sensors and two switch transistors corresponding to the two groups of ambient light sensors on a one-to-one basis, and the interval between the two groups of ambient light sensors transmitting the light brightness sensing signals is 50 milliseconds.

5. The display module according to claim 4, wherein: The brightness control circuit is used for: When a difference between the light brightness sensing signals transmitted by the two groups of ambient light sensors is less than a difference threshold, controlling the light brightness of the plurality of light-emitting elements based on the light brightness sensing signals transmitted by the two groups of ambient light sensors; When the difference between the light brightness sensing signals transmitted by the two groups of ambient light sensors is greater than or equal to the difference threshold, the luminous brightness of the multiple light-emitting elements is controlled based on the light brightness sensing signal transmitted by one of the groups of ambient light sensors, where one group of ambient light sensors is the group of ambient light sensors that transmits a relatively larger light brightness sensing signal among the two groups of ambient light sensors.

6. The display module according to claim 3, wherein: The gate of each switching transistor is used to receive the switching control signal, the source of each switching transistor is connected to the brightness control circuit, and the drain of each switching transistor is connected to a corresponding group of ambient light sensors.

7. The display module according to claim 3, wherein: The display module further comprises: a flexible printed circuit board and an array substrate; The at least two switching transistors are located on the array substrate or the flexible printed circuit board.

8. The display module according to any one of claims 1 to 7, characterized in that: The peripheral area surrounds the display area, and the peripheral area includes: a first peripheral area and a second peripheral area located on opposite sides of the display area in a first direction; The display driver chip is located in the first peripheral area; In the case where the display module includes two groups of ambient light sensors, one group of ambient light sensors is located at the center of the second peripheral area, and the other group of ambient light sensors is located in the first peripheral area and on either side of the display driver chip in the second direction, or both groups of ambient light sensors are located at the center of the second peripheral area, and the second direction intersects with the first direction.

9. The display module according to claim 8, wherein: When both groups of ambient light sensors are located at the center of the second peripheral area, along the second direction, the dark state sensors and the bright state sensors included in one group of ambient light sensors are arranged in sequence with the bright state sensors and the dark state sensors included in the other group of ambient light sensors.

10. The display module according to any one of claims 1 to 7, characterized in that: The display driver chip is connected to the source and drain of multiple photosensitive transistors connected in parallel in each group of the ambient light sensors, and is used to transmit the light-sensitive control signal to the source of the multiple photosensitive transistors and receive the light brightness sensing signal transmitted by the drain of the multiple photosensitive transistors.

11. A display device, characterized in that: The display device comprises: a power supply, and a display module according to any one of claims 1 to 10; The power supply is connected to the display module and is used to supply power to the display module.

12. The display device according to claim 11, wherein The display device is a wearable device.

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