Display control circuit and electronic equipment

Abstract

The present application discloses a display control circuit and an electronic device. The display control circuit includes: an ambient light detection circuit, a feedback control circuit and a pixel array of a display screen; the feedback control circuit is connected between the pixel array of the display screen and the ambient light detection circuit; when the pixel array of the display screen is in a closed state, the feedback control circuit controls the ambient light detection circuit to work. The present application detects the working state of the pixel array of the display screen through the feedback control circuit, and transmits the working state information of the pixel array detected by the feedback control circuit to the ambient light detection circuit. When the pixel array is in a working state, the ambient light detection circuit enters a dormant state; when the pixel array is in a closed state, the ambient light detection circuit detects the ambient light intensity. At this time, the display screen does not emit screen light, which can prevent the screen light emitted by the display screen from affecting the detection result of the ambient light detection circuit, has good real-time performance, and has a high accuracy of the detected ambient light intensity.

Description

Technical Field

[0001] The present application belongs to the field of electronic technology, and specifically relates to a display control circuit and an electronic device. Background Art

[0002] With the development of electronic technology, the screen-to-body ratio of electronic devices such as smartphones is getting larger and larger, and the area on the display screen of electronic devices used to set electronic devices such as sensors is getting smaller and smaller. Therefore, on more and more electronic devices, light sensors are set below the display screen, and the ambient light intensity is collected by the light sensors. The display brightness of the electronic device display is dynamically adjusted according to the ambient light intensity collected by the light sensors. However, in the process of the light sensor checking the ambient light, since the light sensor is placed below the screen, the light sensor cannot distinguish between the ambient light and the screen light emitted by the display screen. The screen light becomes interference in the detection process, resulting in inaccurate judgment of the ambient light intensity by the light sensor, which in turn leads to low accuracy of the ambient light intensity detected by the light sensor.

[0003] Therefore, how to improve the accuracy of light sensors in detecting ambient light is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present application aims to provide a display control circuit and an electronic device to solve the problem that the existing light sensor is affected by the screen light emitted by the display screen when detecting ambient light, resulting in low accuracy of the ambient light intensity detected by the light sensor, and effectively improve the detection accuracy of the ambient light intensity by the light sensor.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a display control circuit, which includes:

[0007] An ambient light detection circuit, a feedback control circuit and a pixel array of a display screen; the feedback control circuit is connected between the pixel array of the display screen and the ambient light detection circuit;

[0008] Wherein, when the pixel array of the display screen is in a closed state, the feedback control circuit controls the ambient light detection circuit to operate.

[0009] In a second aspect, an embodiment of the present application provides an electronic device, which includes:

[0010] A display control circuit as described in the first aspect.

[0011] In an embodiment of the present application, a display control circuit is provided. The display control circuit detects the working state of the pixel array of the display screen through a feedback control circuit, and transmits the working state information of the pixel array detected by the feedback control circuit to the ambient light detection circuit. When the pixel array is in the working state, the ambient light detection circuit enters the sleep state; when the pixel array is in the off state, the ambient light detection circuit detects the ambient light intensity. At this time, the display screen does not emit screen light, which can avoid the screen light emitted by the display screen affecting the detection result of the ambient light detection circuit. The real-time performance is good, and the accuracy of the detected ambient light intensity is high.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0014] Figure 1 A circuit frame of a display control circuit provided by an embodiment of the present invention Figure 1 ;

[0015] Figure 2 A circuit frame of a display control circuit provided by an embodiment of the present invention Figure 2 ;

[0016] Figure 3 is a structural schematic diagram of a first display control circuit provided by an embodiment of the present invention;

[0017] Figure 4 is a structural schematic diagram of a second display control circuit provided by an embodiment of the present invention;

[0018] Figure 5 is a structural schematic diagram of a third display control circuit provided by an embodiment of the present invention;

[0019] Figure 6 is a structural schematic diagram of a fourth display control circuit provided by an embodiment of the present invention;

[0020] Figure 7 4 is a circuit block diagram of an ambient light detection circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0021] Embodiments of the present invention will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0022] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The control circuit provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0025] An embodiment of the present invention provides a display control circuit, which is applied to an electronic device product, wherein the electronic device may be a mobile phone, a tablet computer, a handheld computer or other electronic device.

[0026] See also Figure 1 An embodiment of the present invention discloses a circuit block diagram of a display control circuit, which includes an ambient light detection circuit, a feedback control circuit and a pixel array of a display screen; the feedback control circuit is connected between the pixel array of the display screen and the ambient light detection circuit.

[0027] Wherein, when the pixel array of the display screen is in a closed state, the feedback control circuit controls the ambient light detection circuit to operate.

[0028] like Figure 2As shown, in this embodiment, the display control circuit also includes a processor 104, a display driving circuit 105 and a battery 106. The battery 106 is used to power the display driving circuit 105. The signal input end of the display driving circuit 105 is connected to the processor 104, and the input end of the pixel array 103 is connected to the signal output end of the display driving circuit 105.

[0029] In this embodiment, the working state of the pixel array 103 is detected by the feedback control circuit 102, and the working state information of the pixel array 103 detected by the feedback control circuit 102 is transmitted to the ambient light detection circuit 101;

[0030] When the feedback control circuit 102 detects that the pixel array 103 is in the working state, the feedback control circuit 102 outputs a first level signal to the ambient light detection circuit 101. The first level signal is used to indicate that the pixel array 103 is in the working state. At this time, the ambient light detection circuit 101 receives the first level signal and enters the dormant state.

[0031] When the feedback control circuit 102 detects that the pixel array 103 is in the off state, the feedback control circuit 102 outputs a second level signal to the ambient light detection circuit 101, and the second level signal is used to indicate that the pixel array 103 is in the sleep state. At this time, the ambient light detection circuit 101 receives the second level signal, and the ambient light detection circuit 101 enters the working state to detect the ambient light intensity. At this time, the display screen does not emit screen light, which can prevent the screen light emitted by the display screen from affecting the detection result of the ambient light detection circuit 101, and has good real-time performance and high accuracy of the detected ambient light intensity.

[0032] In this embodiment, the first level signal is different from the second level signal.

[0033] For example, when the first level signal is a high level signal, the second level signal is a low level signal.

[0034] For another example, when the first level signal is a low level signal, the second level is a high level signal.

[0035] In one embodiment, Figure 3 As shown, the feedback control circuit 102 includes a voltage comparator U1.

[0036] A first input terminal of the voltage comparator U1 is connected to a first terminal of the target pixel unit.

[0037] The second input terminal of the voltage comparator U1 is connected to the second terminal of the target pixel unit.

[0038] The output end of the voltage comparator U1 is connected to the ambient light detection circuit.

[0039] The voltage comparator U1 is used to control the ambient light detection circuit to detect the ambient light intensity when the target pixel unit is in the off state.

[0040] The target pixel unit is any one of a plurality of pixel units in a pixel array of the display screen.

[0041] In this embodiment, a reference voltage V0 is stored in the voltage comparator U1 , and the reference voltage V0 is equal to the turn-on voltage of the light emitting diode LED of the target pixel unit.

[0042] In the present embodiment, any one pixel unit is selected from a plurality of pixel units as a target pixel unit, and a voltage V1 across the light emitting diode LED of the target pixel unit is collected through a voltage comparator U1. When V1>V0, it indicates that the light emitting diode LED of the target pixel unit is turned on, and it can be considered that the display screen is working. At this time, the voltage comparator U1 outputs a first level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a dormant state; when V1≤V0, it indicates that the light emitting diode LED of the target pixel unit is turned off, and it can be considered that the display screen stops working. At this time, the voltage comparator U1 outputs a second level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a working state, detects the ambient light intensity, and avoids the screen light emitted by the display screen affecting the detection result of the ambient light detection circuit 101. The real-time performance is good, and the accuracy of the detected ambient light intensity is high.

[0043] For example, the voltage comparator U1 collects the voltage V1 across the light emitting diode LED of the target pixel unit. When V1>V0, the voltage comparator U1 outputs a high-level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a sleep state; when V1≤V0, the voltage comparator U1 outputs a low-level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a working state to detect the ambient light intensity.

[0044] In this embodiment, a first input terminal of the voltage comparator U1 is connected to the anode of the light emitting diode LED of the target pixel unit, and a second input terminal of the voltage comparator U1 is connected to the cathode of the light emitting diode LED of the target pixel unit.

[0045] In one embodiment, Figure 4 As shown, the feedback control circuit 102 includes a judgment module U2 and a plurality of voltage comparators U1 , and the plurality of voltage comparators U1 correspond one-to-one to a plurality of pixel units of a pixel array of a display screen.

[0046] A first input terminal of the voltage comparator U1 is connected to a first terminal of a corresponding pixel unit.

[0047] The second input terminal of the voltage comparator U1 is connected to the second terminal of the corresponding pixel unit.

[0048] The output end of the voltage comparator U1 is connected to the input end of the judgment module U2, and the output end of the judgment module U2 is connected to the ambient light detection circuit.

[0049] The determination module U2 is used to control the ambient light detection circuit to detect the ambient light intensity when the plurality of pixel units are in the off state.

[0050] In this embodiment, since each pixel unit of the pixel array 103 corresponds to a different power supply capacitor, the turn-off time of each pixel unit will also be different. Therefore, by setting a number of voltage comparators U1 equal to the number of pixel units, the working states of multiple pixel units are detected separately, thereby improving the accuracy of the feedback control circuit 102 in detecting the working state of the display screen, thereby improving the accuracy of detecting the ambient light intensity.

[0051] In this embodiment, each of the multiple voltage comparators U1 stores a reference voltage V0 , and the reference voltage V0 of the voltage comparator U1 is equal to the turn-on voltage of the light emitting diode LED of the corresponding pixel unit.

[0052] In this embodiment, a plurality of voltage comparators U1 respectively detect the voltage V1 across the light emitting diode LED of the corresponding pixel unit. For each voltage comparator U1, when V1>V0, the light emitting diode LED of the pixel unit corresponding to the voltage comparator U1 is turned on, and the voltage comparator U1 outputs a first level signal to the judgment module U2; when V1≤V0, the light emitting diode LED of the pixel unit corresponding to the voltage comparator U1 is turned off, and the voltage comparator U1 outputs a second level signal to the judgment module U2.

[0053] The judgment module U2 performs a logical operation on the multiple level signals received. When there is at least one first level signal among the multiple level signals, it indicates that the light emitting diode LED of at least one pixel unit among the multiple pixel units is in a working state, and the judgment module U2 outputs a first level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a sleep state; when the multiple level signals are all second level signals, it indicates that the light emitting diodes LED of the multiple pixel units are all in a closed state, and the judgment module U2 outputs a second level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a working state and detects the ambient light intensity; wherein the first level signal is different from the second level signal; when the first level signal is a high level signal, the second level is a low level signal; when the first level signal is a low level signal, the second level is a high level signal.

[0054] In this embodiment, for each voltage comparator U1 , a first input terminal of the voltage comparator U1 is connected to the anode of the light emitting diode LED of the corresponding pixel unit, and a second input terminal of the voltage comparator U1 is connected to the cathode of the light emitting diode LED of the corresponding pixel unit.

[0055] In one embodiment, Figure 4 As shown, the judgment module U2 is a gate circuit, and the gate circuit has multiple input terminals and one output terminal.

[0056] A plurality of input terminals of the gate circuit are respectively connected to output terminals of a plurality of voltage comparators U1 , and an output terminal of the gate circuit is connected to an ambient light detection circuit.

[0057] In this embodiment, a logic operation is performed on the level signals output by the plurality of voltage comparators U1 by setting a gate circuit, and the gate circuit can be selected as an AND gate circuit, an OR gate circuit or a NAND gate circuit.

[0058] For example, when the gate circuit is an AND gate circuit, the AND gate circuit has multiple input terminals and one output terminal, the multiple input terminals of the AND gate circuit are respectively connected to the output terminals of multiple voltage comparators U1, and the output terminal of the AND gate circuit is connected to the ambient light detection circuit; when there is at least one first level signal among the multiple level signals received by the AND gate circuit, the AND gate circuit outputs the first level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a sleep state; when the multiple level signals received by the AND gate circuit are all second level signals, the AND gate circuit outputs the second level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a working state and detects the ambient light intensity; wherein the first level signal is a low level signal, the second level signal is a high level signal, and the ambient light detection circuit 101 works when receiving the high level signal output by the AND gate circuit.

[0059] For another example, when the gate circuit is an OR gate circuit, the OR gate circuit has multiple input terminals and one output terminal, the multiple input terminals of the OR gate circuit are respectively connected to the output terminals of multiple voltage comparators U1, and the output terminal of the OR gate circuit is connected to the ambient light detection circuit; when there is at least one first level signal among the multiple level signals received by the OR gate circuit, the OR gate circuit outputs the first level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a sleep state; when the multiple level signals received by the OR gate circuit are all second level signals, the OR gate circuit outputs the second level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a working state and detects the ambient light intensity; wherein the first level signal is a high level signal, the second level signal is a low level signal, and the ambient light detection circuit 101 works when it receives the low level signal output by the OR gate circuit.

[0060] For another example, when the gate circuit is a NAND gate circuit, the NAND gate circuit has multiple input terminals and one output terminal, the multiple input terminals of the NAND gate circuit are respectively connected to the output terminals of multiple voltage comparators U1, and the output terminal of the NAND gate circuit is connected to the ambient light detection circuit; when there is at least one first level signal among the multiple level signals received by the NAND gate circuit, the NAND gate circuit outputs a second level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a sleep state; when the multiple level signals received by the NAND gate circuit are all second level signals, the NAND gate circuit outputs a first level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a working state and detects the ambient light intensity; wherein the first level signal is a low level signal, the second level signal is a high level signal, and the ambient light detection circuit 101 works when receiving a low level signal.

[0061] In one embodiment, Figure 5 As shown, the feedback control circuit 102 includes a resistor R and a voltage detection module U3.

[0062] The resistor R is connected in series between the target pixel unit and the ground terminal GND.

[0063] The first input terminal of the voltage detection module U3 is connected to the first end of the resistor R.

[0064] The second input terminal of the voltage detection module U3 is connected to the second end of the resistor R.

[0065] The output end of the voltage detection module U3 is connected to the ambient light detection circuit.

[0066] The voltage detection module U3 is used to control the ambient light detection circuit to detect the ambient light intensity when the target pixel unit is not working.

[0067] The target pixel unit is any pixel unit among a plurality of pixel units in a pixel array of the display screen.

[0068] In this embodiment, the voltage detection module U3 may be an ADC detection module.

[0069] In this embodiment, a reference voltage V2 is stored in the voltage detection module U3, V2 = R × I f , where R is the resistance of resistor R, I f The light emitting diode LED of the target pixel unit emits light, and the light emitting brightness of the light emitting diode LED of the target pixel unit is not enough to affect the current value flowing through the light emitting diode LED when the ambient light detection circuit 101 detects ambient light.

[0070] In this embodiment, any one pixel unit is selected from the multiple pixel units of the pixel array 103 as the target pixel unit, and a resistor R is connected in series between the target pixel unit and the ground terminal GND, and the voltage V3 across the resistor R is collected by the voltage detection module U3. When V3>V2, it means that the light emitting diode LED of the target pixel unit is emitting light normally. When the light emitting diode LED of the target pixel unit is emitting light normally, the light emitting brightness of the light emitting diode LED of the target pixel unit will affect the ambient light detection circuit 101 to detect the ambient light. At this time, the voltage detection module U3 outputs a first level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a dormant state.

[0071] When V3≤V2, it means that the light emitting diode LED of the target pixel unit does not emit light, or the light emitting diode LED of the target pixel unit emits light, but the light emitting brightness of the light emitting diode LED of the target pixel unit will not affect the ambient light detection circuit 101 to detect the ambient light. At this time, the voltage detection module U3 outputs a second level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters the working state, detects the ambient light intensity, and avoids the screen light emitted by the display screen affecting the detection result of the ambient light detection circuit 101. The real-time performance is good, and the accuracy of the detected ambient light intensity is high.

[0072] For example, the voltage detection module U3 collects the voltage V3 across the resistor R corresponding to the target pixel unit. When V3>V2, the voltage detection module U3 outputs a high-level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a sleep state; when V3≤V2, the voltage detection module U3 outputs a low-level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a working state, detects the ambient light intensity, and avoids the screen light emitted by the display screen affecting the detection result of the ambient light detection circuit 101. The real-time performance is good, and the accuracy of the detected ambient light intensity is high.

[0073] In one embodiment, Figure 6 As shown, the feedback control circuit 102 includes a judgment module U2 and a plurality of detection circuits, and the plurality of detection circuits correspond one-to-one to a plurality of pixel units of a pixel array of a display screen.

[0074] The detection circuit includes a resistor R and a voltage detection module U3.

[0075] The resistor R is connected in series between the corresponding pixel unit and the ground terminal GND.

[0076] The first input terminal of the voltage detection module U3 is connected to the first end of the corresponding resistor R.

[0077] The second input terminal of the voltage detection module U3 is connected to the second end of the corresponding resistor R.

[0078] The output end of the voltage detection module U3 is connected to the input end of the judgment module U2, and the output end of the judgment module U2 is connected to the ambient light detection circuit.

[0079] The determination module U2 is used to control the ambient light detection circuit to detect the ambient light intensity when the plurality of pixel units are in the off state.

[0080] In this embodiment, since the corresponding power supply capacitor of each pixel unit is different, the shutdown time of each pixel unit will also be different. Therefore, by setting a detection circuit with a number equal to the pixel units of the pixel array 103 to detect the working status of multiple pixel units respectively, the accuracy of the feedback control circuit 102 in detecting the working status of the display screen is improved, thereby improving the detection accuracy of the ambient light intensity.

[0081] In this embodiment, for each voltage detection module U3, a reference voltage V2 is stored in the voltage detection module U3, V2 = R × I f , where R is the resistance value of the resistor R corresponding to the voltage detection module U3, I f When the light emitting diode LED of the pixel unit corresponding to the voltage detection module U3 emits light and the light emitting brightness of the light emitting diode LED is not enough to affect the current value flowing through the light emitting diode LED when the ambient light detection circuit 101 detects ambient light.

[0082] In this embodiment, for each voltage detection module U3, the voltage V3 across the corresponding resistor R is collected by the voltage detection module U3. When the voltage V3 across the resistor R collected by the voltage detection module U3 is greater than the reference voltage V2, the voltage detection module U3 outputs a first level signal to the judgment module U2; when the voltage V3 across the resistor R collected by the voltage detection module U3 is not greater than the reference voltage V2, the voltage detection module U3 outputs a second level signal to the judgment module U2;

[0083] The judgment module U2 judges the received multiple level signals. When there is at least one first level signal among the multiple level signals, it means that the light emitting diode LED of at least one pixel unit among the multiple pixel units is in working state. The judgment module U2 outputs the first level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters the dormant state; when the multiple level signals are all second level signals, it means that the light emitting diodes LED of the multiple pixel units are all in the off state, or the light emitting brightness of the light emitting diodes LED of the multiple pixel units is not enough to affect the ambient light detection circuit 101 to detect the ambient light, and the judgment module U2 outputs the second level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters the working state and detects the ambient light intensity. Among them, the first level signal is different from the second level signal; when the first level signal is a high level signal, the second level is a low level signal; when the first level signal is a low level signal, the second level is a high level signal.

[0084] In one embodiment, Figure 6 As shown, the judgment module U2 is a gate circuit, and the gate circuit has multiple input terminals and one output terminal;

[0085] The multiple input terminals of the gate circuit are respectively connected to the output terminals of the multiple voltage detection modules U3, and the output terminal of the gate circuit is connected to the ambient light detection circuit.

[0086] In this embodiment, a logic operation is performed on the level signals output by the plurality of voltage detection modules U3 by setting a gate circuit, and the gate circuit can be selected as an AND gate circuit, an OR gate circuit or a NAND gate circuit.

[0087] For example, when the gate circuit is an AND gate circuit, the AND gate circuit has multiple input terminals and one output terminal, the multiple input terminals of the AND gate circuit are respectively connected to the output terminals of multiple voltage detection modules U3, and the output terminal of the AND gate circuit is connected to the ambient light detection circuit; when there is at least one first level signal among the multiple level signals received by the AND gate circuit, the AND gate circuit outputs the first level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a sleep state; when the multiple level signals received by the AND gate circuit are all second level signals, the AND gate circuit outputs the second level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a working state and detects the ambient light intensity; wherein the first level signal is a low level signal, the second level signal is a high level signal, and the ambient light detection circuit 101 works when receiving a high level signal.

[0088] For another example, when the gate circuit is an OR gate circuit, the OR gate circuit has multiple input terminals and one output terminal, the multiple input terminals of the OR gate circuit are respectively connected to the output terminals of multiple voltage detection modules U3, and the output terminal of the OR gate circuit is connected to the ambient light detection circuit; when there is at least one first level signal among the multiple level signals received by the OR gate circuit, the OR gate circuit outputs the first level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a sleep state; when the multiple level signals received by the OR gate circuit are all second level signals, the OR gate circuit outputs the second level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a working state and detects the ambient light intensity; wherein the first level signal is a high level signal, the second level signal is a low level signal, and the ambient light detection circuit 101 works when receiving a low level signal.

[0089] For another example, when the gate circuit is a NAND gate circuit, the NAND gate circuit has multiple input terminals and one output terminal, the multiple input terminals of the NAND gate circuit are respectively connected to the output terminals of multiple voltage detection modules U3, and the output terminal of the NAND gate circuit is connected to the ambient light detection circuit; when there is at least one first level signal among the multiple level signals received by the NAND gate circuit, the NAND gate circuit outputs a second level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a sleep state; when the multiple level signals received by the NAND gate circuit are all second level signals, the NAND gate circuit outputs a first level signal to the ambient light detection circuit 101, so that the ambient light detection circuit 101 enters a working state and detects the ambient light intensity; wherein the first level signal is a low level signal, the second level signal is a high level signal, and the ambient light detection circuit 101 works when receiving a low level signal.

[0090] In one embodiment, the gate circuit is an AND gate circuit, an OR gate circuit or a NAND gate circuit.

[0091] In this embodiment, by configuring the ambient light detection circuit 101 to work when receiving a low level signal or a high level signal, the gate circuit can be selected as an AND gate circuit, an OR gate circuit or a NAND gate circuit.

[0092] like Figure 7 As shown, the ambient light detection circuit 101 includes an ambient light detection control module 1011 and a light sensor 1012 . The ambient light detection control module 1011 is used to control the light sensor 1012 to detect the intensity of ambient light.

[0093] In this embodiment, the ambient light detection control module 1011 is connected to the processor 104 and the feedback control circuit 102 respectively, and the first level signal and the second level signal output by the feedback control circuit 102 are used to control whether the ambient light detection control module 1011 is working; the processor 104 configures the data transmission method, working mode, etc. of the ambient light detection control module 1011.

[0094] In this embodiment, the light sensor 1012 is controlled by the ambient light detection control module 1011. The ambient light intensity is detected by the light sensor 1012, and the ambient light intensity detected by the light sensor 1012 is transmitted to the ambient light detection control module 1011. The ambient light detection control module 1011 then sends the received ambient light intensity to the processor 104, and the processor 104 performs data processing on the received ambient light intensity value.

[0095] An embodiment of the present invention further provides an electronic device, which includes any one of the display control circuits provided in the above display control circuit embodiment section.

[0096] In this embodiment, the electronic device may be a mobile phone, a tablet computer, a PDA, etc.

[0097] In this embodiment, since the electronic device provided by the embodiment of the present invention includes any one of the display control circuits provided in the above display control circuit embodiment part, the electronic device provided by the embodiment of the present invention can achieve the same function as any one of the display control circuits provided in the above display control circuit embodiment part.

[0098] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0099] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A display control circuit, characterized in that: include: Ambient light detection circuit, feedback control circuit and pixel array of display screen; The feedback control circuit is connected between the pixel array of the display screen and the ambient light detection circuit; Wherein, when the pixel array of the display screen is in a closed state, the feedback control circuit controls the ambient light detection circuit to operate; The feedback control circuit includes a judgment module and a plurality of voltage comparators, and the plurality of voltage comparators correspond one-to-one to a plurality of pixel units of the pixel array of the display screen; The first input terminal of the voltage comparator is connected to the first terminal corresponding to the pixel unit; The second input terminal of the voltage comparator is connected to the second terminal corresponding to the pixel unit; The output end of the voltage comparator is connected to the input end of the judgment module, and the output end of the judgment module is connected to the ambient light detection circuit; The judgment module is used to control the ambient light detection circuit to detect the ambient light intensity when the plurality of pixel units are in a closed state; Each of the voltage comparators stores a reference voltage, which is equal to the on-state voltage of the light-emitting diode of the corresponding pixel unit; the voltage comparator is used to collect the voltage across the light-emitting diode of the pixel unit, and determine whether the pixel unit is in an off state based on the voltage across the light-emitting diode and the reference voltage.

2. The display control circuit according to claim 1, characterized in that: The feedback control circuit includes a voltage comparator; The first input terminal of the voltage comparator is connected to the first terminal of the target pixel unit; The second input terminal of the voltage comparator is connected to the second terminal of the target pixel unit; The output end of the voltage comparator is connected to the ambient light detection circuit; The voltage comparator is used to control the ambient light detection circuit to detect the ambient light intensity when the target pixel unit is in a closed state; The target pixel unit is any one of a plurality of pixel units in a pixel array of the display screen.

3. The display control circuit according to claim 1, characterized in that: The judgment module is a gate circuit, and the gate circuit has multiple input terminals and one output terminal; The multiple input terminals of the gate circuit are respectively connected to the output terminals of the multiple voltage comparators, and the output terminal of the gate circuit is connected to the ambient light detection circuit.

4. The display control circuit according to claim 1, characterized in that: The feedback control circuit includes a resistor and a voltage detection module; The resistor is connected in series between the target pixel unit and the ground terminal; The first input terminal of the voltage detection module is connected to the first terminal of the resistor; The second input terminal of the voltage detection module is connected to the second end of the resistor; The output end of the voltage detection module is connected to the ambient light detection circuit; The voltage detection module is used to control the ambient light detection circuit to detect the ambient light intensity when the target pixel unit is not working; The target pixel unit is any one of a plurality of pixel units in a pixel array of the display screen.

5. The display control circuit according to claim 1, characterized in that: The feedback control circuit includes a judgment module and a plurality of detection circuits, and the plurality of detection circuits correspond one-to-one to a plurality of pixel units of the pixel array of the display screen; The detection circuit includes a resistor and a voltage detection module; The resistor is connected in series between the corresponding pixel unit and the ground terminal; The first input terminal of the voltage detection module is connected to the first terminal corresponding to the resistor; The second input terminal of the voltage detection module is connected to the second terminal corresponding to the resistor; The output end of the voltage detection module is connected to the input end of the judgment module, and the output end of the judgment module is connected to the ambient light detection circuit; The judgment module is used to control the ambient light detection circuit to detect the ambient light intensity when the plurality of pixel units are in a closed state.

6. The display control circuit according to claim 5, characterized in that: The judgment module is a gate circuit, and the gate circuit has multiple input terminals and one output terminal; The multiple input ends of the gate circuit are respectively connected to the output ends of the multiple voltage detection modules, and the output end of the gate circuit is connected to the ambient light detection circuit.

7. The display control circuit according to claim 3 or 6, characterized in that: The gate circuit is an AND gate circuit, an OR gate circuit or a NAND gate circuit.

8. The display control circuit according to claim 1, characterized in that: The ambient light detection circuit comprises an ambient light detection control module and a light sensor, wherein the ambient light detection control module is used to control the light sensor to detect the intensity of ambient light.

9. An electronic device, characterized in that: include: A display control circuit as claimed in any one of claims 1 to 8.

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