Display panel and display equipment

Abstract

The invention discloses a display panel and display equipment, and relates to the technical field of display, the display panel comprises an ambient light sensor arranged in the display panel, the ambient light sensor comprises a plurality of photosensitive control units which are connected in parallel and are used for switching the switch state according to the level state of an accessed liquid crystal control signal, the level states of the liquid crystal control signals at the same time point are not high level states at the same time, namely at least one photosensitive control unit at the same time point is in a working state to adjust the backlight brightness of the display equipment, so that the on-off states of the photosensitive control units are switched based on the level states of the liquid crystal control signals. Different photosensitive control units are controlled to enter working states in different time periods, and the problems that when ambient light is continuously in a highlight state, a single thin film transistor is in a working state for a long time, so that the performance of an ambient light sensor is reduced, even the function is invalid, and the backlight adjusting function of display equipment is abnormally influenced are solved.

Description

Technical Field

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

[0002] Adjusting the backlight brightness of display devices is crucial to improving user experience and reducing product power consumption. Conventional display devices generally use fixed or manual backlight brightness adjustment methods, which cannot automatically adjust according to changes in ambient light, thus affecting display effects and energy efficiency. To this end, the application of ambient light sensors has become a solution. It can sense the surrounding light conditions and inform the processing chip to automatically adjust the display backlight brightness to reduce product power consumption and provide a soft picture.

[0003] The core component of the ambient light sensor is a thin film transistor, which is made on a glass substrate, leaving a blank on the opposite side of the glass substrate so that ambient light can shine on the thin film transistor. When the ambient brightness is high, the display device using the ambient light sensor chip will automatically adjust to high brightness; when the external environment is dark, the display device will adjust to low brightness. This automatic adjustment mechanism effectively improves the adaptability and viewing comfort of the display device.

[0004] However, this type of ambient light sensor has certain technical limitations. It usually uses a single thin-film transistor as a photosensitive element. When the ambient light is continuously in a high-brightness state, the thin-film transistor will be in working state for a long time, which can easily lead to photodegradation of the ambient light sensor. The photodegradation phenomenon will reduce the photosensitivity of the ambient light sensor and may even cause the ambient light sensor to fail, thereby affecting the backlight brightness adjustment function of the display device. Summary of the invention

[0005] The main purpose of the present application is to provide a display panel and a display device, aiming to solve the technical problem that conventional ambient light sensors are prone to performance degradation or even functional failure in high-brightness environments, thereby affecting the backlight brightness adjustment function of the display device.

[0006] To achieve the above-mentioned object, the present application proposes a display panel, which includes a display area and a non-display area, an ambient light sensor is provided on the non-display area, and the ambient light sensor includes a plurality of parallel photosensitive control units;

[0007] A photosensitive control unit, used to switch the switch state according to the level state of the connected liquid crystal control signal;

[0008] The level states of the liquid crystal control signals at the same time point are not in the high level state at the same time.

[0009] In one embodiment, the photosensitivity control unit is a first photosensitivity control unit composed of a first control switch device and a first photosensitivity switch device connected in series; or,

[0010] The photosensitivity control unit is a second photosensitivity control unit composed of a second control switch device and a second photosensitivity switch device connected in series;

[0011] The ambient light sensor includes at least one first light sensing control unit and at least one second light sensing control unit.

[0012] In one embodiment, the liquid crystal control signal includes a first liquid crystal control signal and a second liquid crystal control signal;

[0013] The control end of the first control switch device and the control end of the second photosensitive switch device are connected to the first liquid crystal control signal;

[0014] The control end of the second control switch device and the control end of the first photosensitive switch device are connected to the second liquid crystal control signal;

[0015] The level state of the first liquid crystal control signal and the level state of the second liquid crystal control signal at the same time point are not both high level.

[0016] In one embodiment, the non-display area further includes a gate driver array circuit, and the ambient light sensor is connected to the gate driver array circuit for receiving the first liquid crystal control signal and the second liquid crystal control signal generated by the gate driver array circuit.

[0017] In one embodiment, the input end of the first control switch device in each first light sensing control unit and the input end of the second control switch device in each second light sensing control unit are connected to the same positive voltage supply end;

[0018] The output end of the first photosensing switch device in each first photosensing control unit and the output end of the second photosensing switch device in each second photosensing control unit are connected to the same negative voltage power supply end.

[0019] In one embodiment, when the level state of the first liquid crystal control signal is a high level state, the level state of the second liquid crystal control signal is a low level state;

[0020] The first control switch device enters a conducting state, and transmits the current connected from the positive voltage supply terminal to the input terminal of the first photosensitive switch device;

[0021] The first light-sensitive switch device changes the current value flowing in the first light-sensitive switch device according to the sensed light changes, so that the pixel driver on the non-display area adjusts the backlight brightness of the display area according to the current value.

[0022] In one embodiment, when the level state of the first liquid crystal control signal is a low level state, the level state of the second liquid crystal control signal is a high level state;

[0023] The second control switch device enters the on state, and transmits the current connected from the positive voltage supply terminal to the input terminal of the second photosensitive switch device;

[0024] The second light-sensitive switch device changes the current value flowing in the second light-sensitive switch device according to the sensed light changes, so that the pixel driver on the non-display area adjusts the backlight brightness of the display area according to the current value.

[0025] In one embodiment, the ambient light sensor is filled with an insulating material, and the insulating material encloses the first light sensing control unit and the second light sensing control unit; or,

[0026] The insulating material encloses the first control switch device in each first photosensing control unit and the second control switch device in each second photosensing control unit.

[0027] In one embodiment, the ambient light sensor is disposed on one side of the first glass substrate, and the one side of the first glass substrate corresponds to the one side of the second glass substrate;

[0028] A light shielding layer is provided on one side of the second glass substrate, and a position of the light shielding layer on the second glass substrate vertically corresponds to positions of the first control switch device and the second control switch device on the first glass substrate.

[0029] In addition, to achieve the above-mentioned purpose, the present application also provides a display device, which includes the display panel as described above.

[0030] One or more technical solutions proposed in this application have at least the following technical effects:

[0031] A new ambient light sensor is proposed, which is arranged in a display panel. The ambient light sensor includes a plurality of parallel photosensitive control units. The photosensitive control unit is used to switch the switch state according to the level state of the connected liquid crystal control signal. The level states of the liquid crystal control signals at the same time point are not in the high level state at the same time.

[0032] That is, the present application improves the internal components of a conventional ambient light sensor, and improves the conventional ambient light sensor made of a single thin-film transistor into an ambient light sensor composed of multiple parallel photosensitivity control units. Each photosensitivity control unit switches to a corresponding switch state according to the level state of the connected liquid crystal control signal. When the level states of the liquid crystal control signals at the same time point are not in a high level state at the same time, at least one photosensitivity control unit is in a working state to adjust the backlight brightness of the display device at the same time point. Therefore, the switch state of each photosensitivity control unit is switched based on the level state of the liquid crystal control signal, so that different photosensitivity control units are controlled to enter a working state in different time periods, thereby avoiding the problem that when the ambient light continues to be in a high-brightness state, a single thin-film transistor is in a working state for a long time, causing the ambient light sensor to have a performance degradation or even a functional failure, and causing an abnormal impact on the backlight adjustment function of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is a schematic diagram of the module of the ambient light sensor of this application;

[0036] Figure 2 is a side cross-sectional schematic diagram of a conventional ambient light sensor on a display panel;

[0037] Figure 3 Schematic diagram of the internal structure of a conventional ambient light sensor;

[0038] Figure 4 A schematic diagram of a feasible internal structure of an ambient light sensor proposed in this application;

[0039] Figure 5 is a timing diagram of a first liquid crystal control signal and a second liquid crystal control signal;

[0040] Figure 6 This is a side cross-sectional structural diagram of the ambient light sensor of the present application on the display panel;

[0041] Figure 7 This is another side cross-sectional structural diagram of the ambient light sensor of the present application on the display panel.

[0042] Description of Figure Numbers:

[0043] 10. Photosensitive control unit;

[0044] 101, a first photosensing control unit; T1-1, a first control switch device; T1-2, a first photosensing switch device;

[0045] 102, second photosensing control unit; T2-1, second control switch device; T2-2, second photosensing switch device;

[0046] LC1, first liquid crystal control signal; LC2, second liquid crystal control signal;

[0047] Ta, control switch device; Tb, photosensitive switch device;

[0048] 100, ambient light; 20, isolation layer; 301, first glass substrate; 302, second glass substrate; 40, light shielding layer; 50, color filter; 60, pixel; 70, frame glue; 80, effective display active area.

[0049] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0051] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0052] The main solution of the embodiment of the present application is: to propose a new ambient light sensor arranged in the display panel, which includes a plurality of parallel photosensitivity control units; the photosensitivity control unit is used to switch the switch state according to the level state of the connected liquid crystal control signal; wherein the level states of the liquid crystal control signals at the same time point are not in the high level state at the same time.

[0053] Since the core component of the ambient light sensor in the prior art is a thin film transistor, the thin film transistor is made on a glass substrate, and a blank is left on the opposite glass substrate so that ambient light can shine on the thin film transistor. When the ambient brightness is high, the display device using the ambient light sensor chip will automatically adjust to high brightness; when the external environment is dark, the display device will adjust to low brightness. This automatic adjustment mechanism effectively improves the adaptability and viewing comfort of the display device.

[0054] However, this type of ambient light sensor has certain technical limitations. It usually uses a single thin-film transistor as a photosensitive element. When the ambient light is continuously in a high-brightness state, the thin-film transistor will be in working state for a long time, which can easily lead to photodegradation of the ambient light sensor. The photodegradation phenomenon will reduce the photosensitivity of the ambient light sensor and may even cause the ambient light sensor to fail, thereby affecting the backlight brightness adjustment function of the display device.

[0055] The present application provides a solution, namely, by improving the internal components of a conventional ambient light sensor, the conventional ambient light sensor made of a single thin-film transistor is improved into an ambient light sensor composed of multiple parallel photosensitivity control units, each photosensitivity control unit switches to a corresponding switch state according to the level state of the connected liquid crystal control signal, and when the level states of the liquid crystal control signals at the same time point are not in a high level state at the same time, at least one photosensitivity control unit is in a working state at the same time point to adjust the backlight brightness of the display device, so the switch state of each photosensitivity control unit is switched based on the level state of the liquid crystal control signal, so that different photosensitivity control units are controlled to enter the working state in different time periods, avoiding the problem that when the ambient light continues to be in a high-brightness state, a single thin-film transistor is in a working state for a long time, causing the ambient light sensor to have a performance degradation or even a functional failure, and causing an abnormal impact on the backlight adjustment function of the display device.

[0056] Based on this, an embodiment of the present application provides a display panel, which includes a display area and a non-display area, and an ambient light sensor is provided on the non-display area. Figure 1 , Figure 1 This is a module schematic diagram of the ambient light sensor of this application.

[0057] The ambient light sensor includes a plurality of parallel light sensing control units 10. The light sensing control unit 10 is used to switch the switch state according to the level state of the connected liquid crystal control signal. The level state of each liquid crystal control signal at the same time point is not in the high level state at the same time.

[0058] First based on Figure 2 and Figure 3 , the structure of a conventional ambient light sensor is explained, Figure 2 is a side cross-sectional diagram of a conventional ambient light sensor on a display panel. Figure 3 Schematic diagram of the internal structure of a conventional ambient light sensor. It can be seen that a conventional ambient light sensor is based on a single photosensitive thin film transistor (i.e. Figure 3The TFT in the display device can sense changes in ambient light. When the ambient light in the environment of the display device is in a continuous high-brightness state, the photosensitive thin-film transistor will be photodegraded due to long-term exposure to high-brightness light, which will reduce the photosensitivity of the photosensitive thin-film transistor. The ambient light sensor senses changes in ambient light based on the photosensitivity of the photosensitive thin-film transistor, and outputs a corresponding backlight brightness adjustment signal based on the sensing result to achieve the automatic backlight adjustment effect of the display device. Therefore, when the photosensitivity of the photosensitive thin-film transistor is reduced, the ambient light sensor's ability to respond to changes in ambient light will decrease, causing the automatic backlight adjustment effect of the display device to decrease or even fail. Among them, Figure 3 The VDD is the positive voltage supply terminal, and the VSS is the negative voltage supply terminal.

[0059] Therefore, based on the above situation, this embodiment proposes Figure 1 The internal module schematic diagram of an ambient light sensor is shown. According to the figure, it can be seen that the ambient light sensor proposed in this embodiment is provided with multiple parallel photosensitivity control units 10, and the photosensitivity control unit 10 can switch the switching state according to the level state of the connected liquid crystal control signal, that is, according to the level state of the connected liquid crystal control signal, it switches between the working state and the non-working state, and the photosensitivity control unit 10 in the working state can sense the change of ambient light, so that the ambient light sensor can output the corresponding backlight brightness adjustment signal according to the sensing result to adjust the backlight brightness of the display device, that is, the photosensitivity control unit 10 in this embodiment has the same function as the photosensitive thin film transistor in the conventional ambient light sensor.

[0060] In the present embodiment, the number of photosensitive control units 10 provided in the ambient light sensor is multiple, and because the level states of the liquid crystal control signals at the same time point are not simultaneously in the high level state, it can be obtained that the photosensitive control units 10 provided in the ambient light sensor at the same time point do not enter the working state at the same time, and there is at least one photosensitive control unit 10 in the working state. Therefore, by switching the switch state of each photosensitive control unit 10 based on the level state of the liquid crystal control signal, it is possible to control different photosensitive control units 10 to enter the working state in different time periods, thereby solving the problem that when the ambient light is continuously in a high-brightness state, a single photosensitive control unit 10 is in a working state for a long time, causing the ambient light sensor to have a performance degradation, or even a functional failure, and causing an abnormal effect on the backlight adjustment function of the display device. That is, the ambient light sensor proposed in the present embodiment can maintain its ability to respond to changes in ambient light in an environment where the ambient light is continuously in a high-brightness state, thereby ensuring the normal operation of the automatic backlight adjustment function of the display device.

[0061] right Figure 2The device shown in the process is explained, the photosensitive thin film transistor TFT is arranged on a glass substrate 110, and a glass substrate 120 is provided corresponding to the side of the glass substrate 110 where the photosensitive thin film transistor TFT is provided. The glass substrate 120 is provided with a color filter 130 and a black matrix 140. At the same time, pixels 150 for displaying pictures are provided between the two glass substrates corresponding to the color filter 130. At the same time, the black matrix 140 provided on the glass substrate 120 needs to avoid blocking the photosensitive thin film transistor TFT, so that the external ambient light 100 can irradiate the photosensitive thin film transistor TFT.

[0062] Reference Figure 4 As shown, in a feasible implementation, the light sensing control unit 10 is a first light sensing control unit 101 composed of a first control switch device T1-1 and a first light sensing switch device T1-2 connected in series; or, the light sensing control unit 10 is a second light sensing control unit 102 composed of a second control switch device T2-1 and a second light sensing switch device T2-2 connected in series. The ambient light sensor includes at least one first light sensing control unit 101 and at least one second light sensing control unit 102.

[0063] according to Figure 4 It can be seen that the photosensitivity control unit 10 proposed in this embodiment includes two types of photosensitivity control units 10, namely, a first photosensitivity control unit 101 composed of a first control switch device T1-1 and a first photosensitivity switch device T1-2 connected in series, and a second photosensitivity control unit 102 composed of a second control switch device T2-1 and a second photosensitivity switch device T2-2 connected in series.

[0064] Among them, the first control switch device T1-1 is used to control the conduction state of the first photosensitive switch device T1-2. When the first control switch device T1-1 enters the conduction state based on the liquid crystal control signal connected to it, the first photosensitive switch device T1-2 at this time will enter the working state, and change the flow current value from the input end of the first photosensitive switch device T1-2 to the output end of the first photosensitive switch device T1-2 according to the connected ambient light, so that the ambient light sensor can generate a corresponding backlight brightness adjustment signal according to the flow current value.

[0065] Similarly, the second photosensitivity control unit 102, the second control switch device T2-1 is used to control the conduction state of the second photosensitivity switch device T2-2. When the second control switch device T2-1 is turned on based on the liquid crystal control signal connected to it, the second photosensitivity switch device T2-2 at this time will enter the working state, and the flow current value flowing from the input end of the second photosensitivity switch device T2-2 to the output end of the second photosensitivity switch device T2-2 is changed according to the connected ambient light, so that the ambient light sensor can generate a corresponding backlight brightness adjustment signal according to the flow current value.

[0066] Figure 4 A connection structure is proposed in which a first photosensitivity control unit 101 and a second photosensitivity control unit 102 are connected in parallel in an ambient light sensor. When liquid crystal control signals transmitted to a first control switch device T1-1 and a second control switch device T2-1 are not in a high level state at the same time, the first control switch device T1-1 and the second control switch device T2-1 will not enter a conducting state at the same time, that is, the first photosensitivity control unit 101 and the second photosensitivity control unit 102 will not enter a working state at the same time. At any time point, at least one photosensitivity control unit 10 enters a working state. The working states of the first photosensitivity control unit 101 and the second photosensitivity control unit 102 are switched by liquid crystal control signals in different level states, which helps to extend the service life of the first photosensitivity control unit 101 and the second photosensitivity control unit 102, and avoid the light degradation phenomenon caused by a single photosensitivity control unit 10 being in a working state for a long time, which causes the performance of the ambient light sensor to decrease.

[0067] Combination Figure 5 For explanation, the liquid crystal control signal includes a first liquid crystal control signal LC1 and a second liquid crystal control signal LC2; the control end of the first control switch device T1-1 and the control end of the second photosensitive switch device T2-2 are connected to the first liquid crystal control signal LC1; the control end of the second control switch device T2-1 and the control end of the first photosensitive switch device T1-2 are connected to the second liquid crystal control signal LC2; wherein, the level state of the first liquid crystal control signal LC1 and the level state of the second liquid crystal control signal LC2 at the same time point are not both high levels.

[0068] The liquid crystal control signal in this embodiment includes a first liquid crystal control signal LC1 and a second liquid crystal control signal LC2. Since the first control switch device T1-1 and the second control switch device T2-1 enter the on state when the connected liquid crystal control signal is in the high level state, and the first photosensitive switch device T1-2 and the second photosensitive switch device T2-2 enter the working state when the connected liquid crystal control signal is in the low level state, the first liquid crystal control signal LC1 is set to control the first control switch device T1-1 and the second photosensitive switch device T2-2, and the second liquid crystal control signal LC2 is set to control the second control switch device T2-1 and the first photosensitive switch device T1-2.

[0069] Figure 5It is a time sequence of the first liquid crystal control signal LC1 and the second liquid crystal control signal LC2. During the time interval T1, the first liquid crystal control signal LC1 is in a low level state, while the second liquid crystal control signal LC2 is in a high level state. During the time interval T2, the first liquid crystal control signal LC1 is in a high level state, while the second liquid crystal control signal LC2 is in a low level state, which can realize the back and forth switching of the working state of the first light sensing control unit 101 and the second light sensing control unit 102. Among them, the potential of the high level state of the first liquid crystal control signal LC1 and the second liquid crystal control signal LC2 is 30±5V, and the potential of the low level state is -10±5V.

[0070] Further, according to Figure 4 It can be seen that the input end of the first control switch device T1-1 in each first light sensing control unit 101 and the input end of the second control switch device T2-1 in each second light sensing control unit 102 are connected to the same positive voltage supply end (ie Figure 4 The output end of the first light sensing switch device T1-2 in each first light sensing control unit 101 and the output end of the second light sensing switch device T2-2 in each second light sensing control unit 102 are connected to the same negative voltage supply end (i.e. Figure 4 on Vss in the circuit.

[0071] When the first control switch device T1-1 enters the on state, it can receive current from the positive voltage power supply terminal and transmit it to the first photosensitive switch device T1-2. The first photosensitive switch device T1-2 dynamically controls the current value transmitted to the negative voltage power supply terminal through the output terminal of the first photosensitive switch device T1-2 according to the changes in the ambient light received, so that the ambient light sensor can generate a corresponding backlight brightness adjustment signal according to the current value transmitted to the negative voltage power supply terminal.

[0072] When the second control switch device T2-1 enters the on state, it can receive current from the positive voltage power supply terminal and transmit it to the second photosensitive switch device T2-2. The second photosensitive switch device T2-2 dynamically controls the current value transmitted to the negative voltage power supply terminal through the output terminal of the second photosensitive switch device T2-2 according to the changes in the ambient light received, so that the ambient light sensor can generate a corresponding backlight brightness adjustment signal according to the current value transmitted to the negative voltage power supply terminal.

[0073] It should be noted that the non-display area also includes a gate driver array circuit. Taking into account the cost of the display device, this embodiment sets an ambient light sensor connected to the gate driver array circuit for accessing the first liquid crystal control signal LC1 and the second liquid crystal control signal LC2 generated by the gate driver array circuit. That is, no separate liquid crystal control signal generating device is additionally provided to generate a liquid crystal control signal for controlling the working state of the photosensitive control unit 10. Instead, the ambient light sensor is connected to the gate driver array circuit by adding a connecting line, so that the ambient light sensor is directly connected to the liquid crystal control signal generated by the gate driver array circuit, thereby avoiding the increase in device cost caused by the need to additionally add a separate liquid crystal control signal generating device.

[0074] based on Figure 4 and Figure 5 , the operating timing of the first light sensing control unit 101 and the second light sensing control unit 102 included in the ambient light sensor of this embodiment is described.

[0075] ① When the level state of the first liquid crystal control signal LC1 is in a low level state, the level state of the second liquid crystal control signal LC2 is in a high level state; the second control switch device T2-1 enters the on state, and transmits the current connected from the positive voltage power supply terminal to the input terminal of the second photosensitive switch device T2-2; the second photosensitive switch device T2-2 changes the flowing current value in the second photosensitive switch device T2-2 according to the sensed light changes, so that the pixel driver on the non-display area adjusts the backlight brightness of the display area according to the flowing current value.

[0076] When the internal structure of the ambient light sensor is Figure 4 When shown, and is currently in Figure 5During the time interval T1 shown, because the first control switch device T1-1 in the first photosensitivity control unit 101 is connected to the first liquid crystal control signal LC1 in a low level state, and the first photosensitivity switch device T1-2 is connected to the second liquid crystal control signal LC2 in a high level state, the first photosensitivity control unit 101 is in a non-working state at this time. The second control switch device T2-1 in the second photosensitive control unit 102 is connected to the second liquid crystal control signal LC2 in a high level state, and the second photosensitive switch device T2-2 is connected to the first liquid crystal control signal LC1 in a low level state. Therefore, the second photosensitive control unit 102 is in a working state at this time. The second control switch device T2-1 will connect to the current on the positive voltage power supply end and transmit the current to the input end of the second photosensitive switch device T2-2. The second photosensitive switch device T2-2 in the working state will dynamically change the flow current value of the current flowing from its input end to the negative voltage power supply end via the output end according to the changes in the received ambient light. The ambient light sensor can detect the flow current value, and after generating a corresponding backlight brightness adjustment signal according to the detection structure, the backlight brightness adjustment signal is transmitted to the pixel driver, so that the pixel driver can change the backlight brightness of the display area according to the backlight brightness adjustment signal.

[0077] ② When the level state of the first liquid crystal control signal LC1 is in a high level state, the level state of the second liquid crystal control signal LC2 is in a low level state; the first control switch device T1-1 enters the on state, and transmits the current connected from the positive voltage power supply end to the input end of the first photosensitive switch device T1-2; the first photosensitive switch device T1-2 changes the current value flowing in the first photosensitive switch device T1-2 according to the changes in the sensed light, so that the pixel driver on the non-display area adjusts the backlight brightness of the display area according to the flowing current value.

[0078] When the internal structure of the ambient light sensor is Figure 4 When shown, and is currently in Figure 5During the time interval T1 shown, because the second control switch device T2-1 in the second photosensitivity control unit 102 is connected to the second liquid crystal control signal LC2 in a low level state, and the second photosensitivity switch device T2-2 is connected to the first liquid crystal control signal LC1 in a high level state, the second photosensitivity control unit 102 is in a non-working state at this time. The first control switch device T1-1 in the first photosensitive control unit 101 is connected to the first liquid crystal control signal LC1 in a high level state, and the first photosensitive switch device T1-2 is connected to the second liquid crystal control signal LC2 in a low level state. Therefore, the first photosensitive control unit 101 is in a working state at this time. The first control switch device T1-1 will connect to the current on the positive voltage power supply end and transmit the current to the input end of the first photosensitive switch device T1-2. The first photosensitive switch device T1-2 in the working state will dynamically change the flow current value of the current flowing from its input end to the negative voltage power supply end via the output end according to the changes in the received ambient light. The ambient light sensor can detect the flow current value, and after generating a corresponding backlight brightness adjustment signal according to the detection structure, the backlight brightness adjustment signal is transmitted to the pixel driver, so that the pixel driver can change the backlight brightness of the display area according to the backlight brightness adjustment signal.

[0079] Considering the operational stability of the ambient light sensor 100 , it is proposed to fill an insulator in the ambient light sensor 100 , and the insulator may be a transparent polyimide.

[0080] In one possible implementation, refer to Figure 6 The side cross-sectional view of the ambient light sensor 100 on the display panel is shown, and the insulating material encapsulates the first photosensitive control unit 101 and the second photosensitive control unit 102. That is, the switch devices in the first photosensitive control unit 101 and the second photosensitive control unit 102 are encapsulated in transparent polyimide, and the polyimide is used as an encapsulation layer to prevent water vapor and other environmental factors from penetrating into the switch devices when the display device is running in a high temperature and high humidity environment, thereby improving the reliability and service life of the first photosensitive control unit 101 and the second photosensitive control unit 102, and further ensuring the operating stability of the ambient light sensor 100.

[0081] In another possible implementation, referring to Figure 7 As shown, the insulating material encloses the first control switch device T1 - 1 in each first photosensing control unit 101 and the second control switch device T2 - 1 in each second photosensing control unit 102 .

[0082] Furthermore, the insulating material used in the above-mentioned embodiment is a transparent polyimide, but the insulating material still intercepts the ambient light 100, that is, it reduces the light transmittance of the ambient light 100 irradiated on the photosensitive switch device Tb. In an operating environment where the ambient light 100 is weak, Figure 6 The state where the photosensitive control unit 10 is wrapped by an insulating object will reduce the light sensitivity of the photosensitive switch device Tb. Therefore, in order to ensure the responsiveness of the photosensitive switch device Tb to the ambient light 100, another wrapping method is proposed, that is, Figure 7 The side cross-sectional view of the ambient light sensor 100 on the display panel shows that the control switch device Ta in the first photosensitive control unit 101 and the second photosensitive control unit 102 is wrapped in polyimide, while the photosensitive switch device Tb in the first photosensitive control unit 101 and the second photosensitive control unit 102 is directly exposed to the non-display area, so that the external ambient light 100 can directly irradiate the photosensitive switch device Tb, avoiding the reduction of light transmittance.

[0083] Among them, from Figure 6 and Figure 7 It can be seen that the ambient light sensor 100 is arranged on one side of the first glass substrate 30, and the side of the first glass substrate 30 corresponds to the side of the second glass substrate 40; a shading layer 50 is provided on one side of the second glass substrate 40, and the position of the shading layer 50 on the second glass substrate 40 corresponds vertically to the positions of the first control switch device T1-1 and the second control switch device T2-1 on the first glass substrate 30.

[0084] At the same time, in order to avoid the influence of ambient light 100 on the control switch device Ta, it is proposed to provide a shading layer 50 for shading the control switch device Ta in the first photosensitive control unit 101 and the second photosensitive control unit 102 on the side of the second glass substrate 40 corresponding to the side of the first glass substrate 30. Because the position of the shading layer 50 corresponds vertically to the position of the control switch device Ta, it can effectively isolate the ambient light 100 from irradiating the control switch device Ta, thereby avoiding the influence of ambient light 100 on the control switch device Ta and improving the control stability of the control switch device Ta on the photosensitive switch device Tb.

[0085] right Figure 6 and Figure 7The devices involved in the ambient light sensor 100 are explained. The control switch device Ta and the photosensitivity control device in the ambient light sensor 100 are arranged on a pair of glass substrates. A second glass substrate 40 is provided corresponding to the side of the first glass substrate 30 on which the ambient light sensor 100 is provided. A color filter 60 and a light shielding layer 50 are provided on the second glass substrate 40. At the same time, pixels 70 for displaying images and frame glue 80 for bonding the first glass substrate 30 and the second glass substrate 40 together are provided between the two glass substrates corresponding to the color filter 60 to form a sealed space to prevent external gas, moisture and other pollutants from entering the interior of the display panel. At the same time, an effective display activity area 90 is also provided inside the isolation layer 20 for displaying images or content.

[0086] The present application also provides a display device, comprising the display panel as described above.

[0087] The display device provided by the present application can solve the technical problem that conventional ambient light sensors are prone to performance degradation or even functional failure in high-brightness environments, thereby affecting the backlight brightness adjustment function of the display device. Compared with the prior art, the beneficial effects of the display device provided by the present application are the same as the beneficial effects of the display panel provided by the above-mentioned embodiment, which will not be described in detail here.

[0088] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel includes a display area and a non-display area, the non-display area is provided with an ambient light sensor, and the ambient light sensor includes a plurality of parallel light sensing control units; The photosensitive control unit is used to switch the switch state according to the level state of the connected liquid crystal control signal; Wherein, the level states of the liquid crystal control signals at the same time point are not simultaneously in the high level state.

2. The display panel according to claim 1, wherein: The photosensitive control unit is a first photosensitive control unit composed of a first control switch device and a first photosensitive switch device connected in series; or, The photosensitive control unit is a second photosensitive control unit composed of a second control switch device and a second photosensitive switch device connected in series; The ambient light sensor includes at least one first light sensing control unit and at least one second light sensing control unit.

3. The display panel according to claim 2, wherein: The liquid crystal control signal includes a first liquid crystal control signal and a second liquid crystal control signal; The control end of the first control switch device and the control end of the second photosensitive switch device are connected to the first liquid crystal control signal; The control end of the second control switch device and the control end of the first photosensitive switch device are connected to the second liquid crystal control signal; Wherein, the level state of the first liquid crystal control signal and the level state of the second liquid crystal control signal at the same time point are not both high level.

4. The display panel according to claim 3, wherein: The non-display area further includes a gate driver array circuit, and the ambient light sensor is connected to the gate driver array circuit for receiving the first liquid crystal control signal and the second liquid crystal control signal generated by the gate driver array circuit.

5. The display panel according to claim 3, wherein: The input end of the first control switch device in each of the first light sensing control units and the input end of the second control switch device in each of the second light sensing control units are connected to the same positive voltage supply end; The output end of the first photosensing switch device in each of the first photosensing control units and the output end of the second photosensing switch device in each of the second photosensing control units are connected to the same negative voltage power supply end.

6. The display panel according to claim 5, wherein: When the level state of the first liquid crystal control signal is a high level state, the level state of the second liquid crystal control signal is a low level state; The first control switch device enters a conducting state, and transmits the current connected from the positive voltage supply terminal to the input terminal of the first photosensitive switch device; The first photosensing switch device changes the current value of the current flowing in the first photosensing switch device according to the sensed light changes, so that the pixel driver on the non-display area adjusts the backlight brightness of the display area according to the current value.

7. The display panel according to claim 5, wherein: When the level state of the first liquid crystal control signal is a low level state, the level state of the second liquid crystal control signal is a high level state; The second control switch device enters a conducting state, and transmits the current connected from the positive voltage supply terminal to the input terminal of the second photosensitive switch device; The second photosensing switch device changes the current value of the current flowing in the second photosensing switch device according to the sensed light changes, so that the pixel driver on the non-display area adjusts the backlight brightness of the display area according to the current value.

8. The display panel according to claim 2, wherein: The ambient light sensor is filled with an insulating material, and the insulating material encloses the first light sensing control unit and the second light sensing control unit; or, The insulating object encloses the first control switch device in each of the first photosensitivity control units and the second control switch device in each of the second photosensitivity control units.

9. The display panel according to claim 2, wherein: The ambient light sensor is disposed on one side of the first glass substrate, and the one side of the first glass substrate corresponds to one side of the second glass substrate; A light shielding layer is provided on one side of the second glass substrate, and a position of the light shielding layer on the second glass substrate vertically corresponds to a position of the first control switch device and the second control switch device on the first glass substrate.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 9.

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