WO2021115158A1 - 显示亮度控制装置及电子设备 - Google Patents

显示亮度控制装置及电子设备 Download PDF

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Publication number
WO2021115158A1
WO2021115158A1 PCT/CN2020/133070 CN2020133070W WO2021115158A1 WO 2021115158 A1 WO2021115158 A1 WO 2021115158A1 CN 2020133070 W CN2020133070 W CN 2020133070W WO 2021115158 A1 WO2021115158 A1 WO 2021115158A1
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WIPO (PCT)
Prior art keywords
switch
terminal
control
detection
diode
Prior art date
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PCT/CN2020/133070
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English (en)
French (fr)
Inventor
曲孔宁
Original Assignee
北京集创北方科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京集创北方科技股份有限公司 filed Critical 北京集创北方科技股份有限公司
Priority to EP20898471.6A priority Critical patent/EP4071748A4/en
Priority to KR1020227021587A priority patent/KR102631081B1/ko
Publication of WO2021115158A1 publication Critical patent/WO2021115158A1/zh
Priority to US17/837,317 priority patent/US11715443B2/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0876—Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light

Definitions

  • the present disclosure relates to the field of integrated circuit technology, and in particular to a display brightness control device and electronic equipment.
  • Electronic devices such as mobile phones include ambient light detectors, which automatically adjust the brightness of the display screen by detecting the brightness of the ambient light.
  • Traditional ambient light detection is realized by the photoelectric sensor on the front end of the mobile phone, which requires a separate sensor and compresses the space of other devices, and when the display is a full screen, it needs to be specially hollowed out to place the photoelectric sensor. This will increase the complexity of the process and at the same time reduce the user experience.
  • the present disclosure proposes a display brightness control device, the device is applied to a display panel, the display panel includes a thin film transistor unit and a light-emitting unit, and the device includes:
  • the detection module includes a plurality of thin film transistors in the thin film transistor unit, and is used to output a detection current according to the brightness of the ambient light;
  • the control module is electrically connected to the detection module and used to control the light-emitting brightness of the light-emitting unit according to the detection current.
  • the detection module includes one or more detection units
  • the control of the light-emitting brightness of the light-emitting unit according to the detection current includes:
  • a first control signal is obtained to control the light-emitting brightness of the light-emitting unit.
  • the detection unit includes a first diode, a first capacitor, a second capacitor, a first switch, and a second switch, where:
  • the negative terminal of the first diode is electrically connected to the first terminal of the first switch and the first terminal of the first capacitor
  • the second terminal of the first switch is electrically connected to the second switch
  • the first terminal of the second capacitor and the first terminal of the second capacitor, the control terminal of the first switch, the control terminal of the second switch, and the second terminal of the second switch are electrically connected to the control module,
  • the positive terminal of the first diode, the second terminal of the first capacitor, and the second terminal of the second capacitor are grounded
  • the first diode includes a plurality of thin film transistors connected in parallel.
  • control module includes a first operational amplifier, a third capacitor, a third switch, and a first control unit, wherein:
  • the first input terminal of the first operational amplifier is electrically connected to the second terminal of the second switch, the first terminal of the third capacitor, and the first terminal of the third switch.
  • the first operational amplifier The second input terminal is used to input a reference signal, and the output terminal of the first operational amplifier is electrically connected to the second terminal of the third capacitor, the second terminal of the third switch and the first control unit,
  • the control terminal of the third switch is electrically connected to the first control unit;
  • the first control unit is used for:
  • the conduction state of the first switch, the second switch, and the third switch is performed through the control terminal of the first switch, the control terminal of the second switch, and the control terminal of the third switch. Control to control the detection unit to obtain the detection current;
  • the first control signal is obtained according to the detection current.
  • control terminal of the first switch, the control terminal of the second switch, and the control terminal of the third switch are connected to the first switch and the second switch.
  • Controlling the conduction state of the third switch to control the detection unit to obtain the detection current includes:
  • the second switch When the first time period is reached, the second switch is turned on, and the first switch and the third switch are turned off.
  • the detection unit includes a second diode, a third diode, a fourth switch, a fifth switch, a first transistor, and a second transistor, where:
  • the positive terminal of the second diode is electrically connected to the first terminal of the fourth switch, and the second terminal of the fourth switch is electrically connected to the drain of the second transistor and the control module,
  • the positive terminal of the third diode is electrically connected to the first terminal of the fifth switch, and the second terminal of the fifth switch is electrically connected to the drain of the first transistor and the drain of the first transistor.
  • control terminal of the fourth switch and the control terminal of the fifth switch are electrically connected to the control module
  • the negative terminal of the second diode, the negative terminal of the third diode, the gate of the first transistor, and the gate of the second transistor are grounded,
  • the second diode and the third diode include a plurality of thin film transistors connected in parallel, and the third diode is set so as not to be irradiated by ambient light.
  • control module includes a second operational amplifier, a fourth capacitor, a sixth switch, and a second control unit, wherein:
  • the first input terminal of the second operational amplifier is electrically connected to the second terminal of the fourth switch and the drain of the second transistor, and the second input terminal of the second operational amplifier is used to input a reference signal,
  • the output terminal of the second operational amplifier is electrically connected to the second terminal of the fourth capacitor, the second terminal of the sixth switch and the second control unit, and the control terminal of the sixth switch is electrically connected to The second control unit;
  • the second control unit is used for:
  • the conduction state of the fourth switch, the fifth switch, and the sixth switch is performed through the control terminal of the fourth switch, the control terminal of the fifth switch, and the control terminal of the sixth switch. Control to control the detection unit to obtain the detection current;
  • the first control signal is obtained according to the detection current.
  • control terminal of the fourth switch, the control terminal of the fifth switch, and the control terminal of the sixth switch are connected to the fourth switch and the fifth switch.
  • Controlling the conduction state of the sixth switch to control the detection unit to obtain the detection current includes:
  • the sixth switch is turned on, and the fourth switch and the fifth switch are turned off;
  • the fourth switch and the fifth switch are turned on, and the sixth switch is turned off.
  • control module is arranged in a touch display driver chip (Touch and Display Driver Integration, TDDI), a fingerprint touch display driver chip (Fingerprint Touch and Display Driver Integration, FTDDI), and a fingerprint display driver Chip (Fingerprint and Display Driver Integration, FDDI) of any kind.
  • TDDI Touch and Display Driver Integration
  • FTDDI Fingerprint Touch and Display Driver Integration
  • FDDI Fingerprint and Display Driver Integration
  • an electronic device includes:
  • the display brightness control device The display brightness control device
  • the display panel includes at least one of a liquid crystal display panel, a light emitting diode display panel, an organic light emitting diode display panel, and a micro light emitting diode display panel.
  • the micro light emitting diode display panel includes Mini LED or Micro LED.
  • the detection module is realized by thin film transistors, and is arranged in the thin film transistor unit on the display surface.
  • the light-sensitive characteristics of the thin film transistors are used to detect the brightness of the ambient light, which occupies a small space and does not need to be hollowed out in the full screen. Setting, the process complexity is low, compared with the related technology, it has the characteristics of low cost, and can improve the user experience.
  • Fig. 1 shows a block diagram of a display brightness control device according to an embodiment of the present disclosure.
  • Fig. 2 shows a block diagram of a display brightness control device according to an embodiment of the present disclosure.
  • Fig. 3 shows a schematic diagram of a display brightness control device according to an embodiment of the present disclosure.
  • Fig. 4 shows a schematic diagram of a display brightness control device according to an embodiment of the present disclosure.
  • Fig. 5 shows a schematic diagram of a display brightness control device according to an embodiment of the present disclosure.
  • FIG. 1 shows a block diagram of a display brightness control device according to an embodiment of the present disclosure.
  • the display brightness control device may be applied to a display panel.
  • the display panel includes a thin film transistor unit and a light-emitting unit. As shown in FIG. 1, the device includes:
  • the detection module 10 includes a plurality of thin film transistors (TFT) in the thin film transistor unit, and is used to output a detection current according to the brightness of the ambient light;
  • TFT thin film transistors
  • the control module 20 is electrically connected to the detection module 10, and is configured to control the light-emitting brightness of the light-emitting unit according to the detection current.
  • the display brightness control device proposed by the embodiment of the present disclosure implements the detection module through thin film transistors, and is arranged in the thin film transistor unit on the display surface, and uses the photosensitive characteristics of the thin film transistor to detect the brightness of the ambient light, which occupies a small space and is used in a full screen. There is no need to hollow out the setting, the process complexity is low, compared with related technologies, it has the characteristics of low cost, and can improve the user experience.
  • the present disclosure does not limit the specific type of the display panel.
  • the display panel may be a self-luminous type display panel or a backlight type display panel, which can be selected by those skilled in the art as required.
  • the display panel may be a self-luminous type display panel, such as an organic light-emitting diode OLED display panel.
  • the light-emitting unit may refer to the display panel itself, and the control module 20 may control the display according to the detection current.
  • the light emission brightness of the panel; the thin film transistor unit may include a plurality of thin film transistors arranged on a substrate.
  • the display panel may be a backlight type display panel, such as a liquid crystal display panel.
  • the light-emitting unit may refer to a backlight layer in the display panel, and the control module 20 may control the backlight layer according to the detection current.
  • the luminescence brightness; the thin film transistor unit may include a plurality of thin film transistors arranged on a substrate.
  • the display panel may be set in an electronic device, and the electronic device may also be called a mobile device.
  • the mobile device may refer to various forms of access mobile devices, user units, user equipment, user stations, mobile stations, and mobile stations ( Mobile Station, MS), remote station, remote mobile equipment, mobile equipment, user mobile equipment, terminal equipment (terminal equipment), wireless communication equipment, user agent or user device.
  • the user equipment can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, user equipment in the future 5G network, or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) Mobile devices, etc., are not limited in the embodiments of the present disclosure.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • FIG. 2 shows a block diagram of a display brightness control device according to an embodiment of the present disclosure.
  • the detection module includes one or more detection units 110, and the control of the light-emitting brightness of the light-emitting unit according to the detection current may include:
  • a first control signal is obtained to control the light-emitting brightness of the light-emitting unit.
  • the embodiment of the present disclosure can control the luminous brightness of the display panel through the detection current output by one or more detection units.
  • multiple detection units 110 may be used, and the multiple detection units 110 may be distributed at multiple positions of the thin film transistor unit to obtain multiple detection currents.
  • the control module 20 may obtain a control signal according to each detection current.
  • a plurality of control signals are synthesized to obtain the first control signal to realize the control of the luminous brightness of the display panel.
  • the display brightness control device proposed in the embodiment of the present disclosure can obtain a more accurate first control signal, thereby better adapting to changes in ambient light.
  • only one detection unit may be used to detect the brightness of the ambient light, so that the cost can be better reduced and the change of the brightness of the ambient light can be reacted more quickly.
  • the detection unit 110 in the embodiment of the present disclosure may include multiple possible implementation manners.
  • each detection unit 110 may be the same or different.
  • a possible implementation manner of the detection unit 110 will be exemplarily introduced below.
  • FIG. 3 shows a schematic diagram of a display brightness control device according to an embodiment of the present disclosure.
  • the detection unit 110 may include a first diode D1, a first capacitor C1, a second capacitor C2, a first switch K1, and a second switch K2, where :
  • the negative terminal of the first diode D1 is electrically connected to the first terminal of the first switch K1 and the first terminal of the first capacitor C1, and the second terminal of the first switch K1 is electrically connected to the first terminal of the first capacitor C1.
  • the first terminal of the second switch K2 and the first terminal of the second capacitor C1, the control terminal of the first switch K1, the control terminal of the second switch K2, and the second terminal of the second switch K2 The terminal is electrically connected to the control module (the control terminal of each switch and its connection relationship are not shown), the positive terminal of the first diode D1, the second terminal of the first capacitor C1, and the second capacitor
  • the second end of C2 is grounded
  • the first diode D1 includes a plurality of thin film transistors connected in parallel.
  • a plurality of thin film transistors are connected in parallel to obtain the first diode D1, and the light-sensitive characteristics of the thin film transistors can be used to detect the brightness of the ambient light.
  • control module 20 may include a first operational amplifier A1, a third capacitor C3, a third switch K3, and a first control unit 210, wherein:
  • the first input terminal of the first operational amplifier A1 is electrically connected to the second terminal of the second switch K2, the first terminal of the third capacitor C3, and the first terminal of the third switch K3.
  • the second input terminal of the first operational amplifier A1 is used to input the reference signal VCM, and the output terminal of the first operational amplifier is electrically connected to the second terminal of the third capacitor C3 and the second terminal of the third switch K3
  • the control terminal of the third switch K3 is electrically connected to the first control unit 210;
  • the first control unit 210 is used to:
  • the first control signal is obtained according to the detection current.
  • the first control unit 210 may include a digital-to-analog converter, a microprocessor MCU, a digital signal processor DSP, etc., to convert the voltage signal VCA output by the first operational amplifier A1 into a first control unit. signal.
  • control terminal of the first switch K1, the control terminal of the second switch K2, and the control terminal of the third switch K3 are connected to the first switch K1
  • Controlling the conduction state of the second switch K2 and the third switch K3 to control the detection unit 110 to obtain the detection current may include:
  • the first switch K1 and the third switch K3 are turned on, and the second switch K2 is turned off;
  • the second switch K2 When the first time period is reached, the second switch K2 is turned on, and the first switch K1 and the third switch K3 are turned off.
  • the first switch K1 when the first switch K1 is turned on and the second switch K2 is turned off, the second capacitor C2 can be charged, and when the third switch K3 is turned on, the first operational amplifier can be charged A1 is set.
  • the second switch K2 When the first time period is reached, the second switch K2 is turned on, the first switch K1 and the third switch K3 are turned off, the second capacitor C2 starts to discharge, and the output terminal of the first operational amplifier A1
  • the first control unit 210 controls the conduction state of the first switch K1, the second switch K2, and the third switch K3, which can realize the sampling of the detection current and obtain the corresponding voltage signal.
  • the size of the third capacitor C3 can be reduced, thereby saving space and cost.
  • the third capacitance is required to be at least 50pF.
  • the embodiment of the present disclosure can set the first capacitor C1 and the second capacitor C2 to change the third capacitor C1 and the second capacitor C2.
  • the size of the capacitor C3 is reduced to 1/10 of the original size.
  • the capacitance value of the first capacitor C1 may be 9 times the capacitance value of the second capacitor C2.
  • FIG. 4 shows a schematic diagram of a display brightness control device according to an embodiment of the present disclosure.
  • the detection unit 110 includes a second diode D2, a third diode D3, a fourth switch K4, a fifth switch K5, a first transistor Q1, The second transistor Q2, where:
  • the positive terminal of the second diode D2 is electrically connected to the first terminal of the fourth switch K4, and the second terminal of the fourth switch K4 is electrically connected to the drain of the second transistor Q2 and the Control module 20,
  • the positive terminal of the third diode D3 is electrically connected to the first terminal of the fifth switch K5, and the second terminal of the fifth switch K5 is electrically connected to the drain of the first transistor Q1, the The gate of the first transistor Q1 and the gate of the second transistor Q2,
  • the control terminal of the fourth switch K4 and the control terminal of the fifth switch K5 are electrically connected to the control module 20 (the control terminal of each switch and the connection relationship with the control module are not shown),
  • the negative terminal of the second diode D2, the negative terminal of the third diode D3, the gate of the first transistor Q1, and the gate of the second transistor Q2 are grounded,
  • the second diode D2 and the third diode D3 include a plurality of thin film transistors connected in parallel, and the third diode D3 is set so as not to be irradiated by ambient light.
  • the second diode D2 and the third diode D3 are realized by multiple thin film transistors connected in parallel, and the third diode D3 is set to be unable to be irradiated by ambient light, and thin film can be used.
  • the photosensitive characteristic of the transistor detects the ambient light, and using the third diode D3 as a control, the base current (base current) existing in the thin film transistor itself can be eliminated to improve the signal-to-noise ratio.
  • control module 20 may include a second operational amplifier A2, a fourth capacitor C4, a sixth switch K6, and a second control unit 220, where:
  • the first input terminal of the second operational amplifier A2 is electrically connected to the second terminal of the fourth switch K4 and the drain of the second transistor Q2, and the second input terminal of the second operational amplifier A2 is used for Input the reference signal VCM, the output terminal of the second operational amplifier A2 is electrically connected to the second terminal of the fourth capacitor C4, the second terminal of the sixth switch K6 and the second control unit 220, the The control terminal of the sixth switch K6 is electrically connected to the second control unit 220 (the control terminal and connection relationship are not shown);
  • the second control unit 220 may be used for:
  • the first control signal is obtained according to the detection current.
  • control terminal of the fourth switch K4, the control terminal of the fifth switch K5, and the control terminal of the sixth switch K6 are connected to the fourth switch K4, the control terminal of the sixth switch K6, and the fourth switch K4.
  • Controlling the conduction states of the fifth switch K5 and the sixth switch K6 to control the detection unit 110 to obtain the detection current may include:
  • the sixth switch is turned on, and the fourth switch and the fifth switch are turned off;
  • the fourth switch and the fifth switch are turned on, and the sixth switch is turned off.
  • the embodiment of the present disclosure turns on the sixth switch and turns off the fourth switch and the fifth switch to set the second operational amplifier A2.
  • the embodiment of the present disclosure turns on the fourth switch, the fifth switch, and turns off the sixth switch to obtain the detection current through the detection unit 110, where the third and second The pole tube D3 has undergone light-shielding processing and can output the basic current.
  • the second diode D2 senses the brightness of the ambient light and outputs the first current.
  • the current mirror composed of the first transistor Q1 and the second transistor Q2 divides the first current and the basic current. Make a difference to obtain the detection current. Since the detection current is obtained after removing the base current, error interference is eliminated and the signal-to-noise ratio is improved.
  • the embodiment of the present disclosure takes the current mirror composed of the first transistor Q1 and the second transistor Q2 as an example to illustrate the difference circuit.
  • the difference circuit may also include others.
  • the second control unit 220 may include a digital-to-analog converter, a microprocessor MCU, a digital signal processor DSP, etc., to convert the voltage signal VCA output by the first operational amplifier A1 into the first control unit. signal.
  • first control unit 210 and the second control unit 220 can process the voltage signal VCA in the same manner.
  • the processing of the voltage signal VCA will be exemplified below. It should be understood that the following description is applicable to the first control unit 210 and the second control unit 220.
  • the embodiment of the present disclosure may perform analog-to-digital conversion on the voltage signal VCA to obtain a digital signal corresponding to the voltage signal VCA, and the digital signal may be stored in a storage unit (for example, In SRAM), by calling the preset light intensity look-up table stored in the storage unit, the ambient light intensity corresponding to the digital signal can be obtained, and the first control signal can be obtained by using the obtained ambient light intensity.
  • a storage unit for example, In SRAM
  • the preset light intensity look-up table may include the corresponding relationship between the voltage (digital signal) and the ambient light intensity. Therefore, after the voltage is obtained, the voltage can be used to find the corresponding ambient light intensity.
  • the detection module 10 when the detection module 10 includes multiple detection units, multiple control signals can be obtained.
  • the embodiment of the present disclosure can perform processing such as averaging operation on multiple control signals.
  • the luminous brightness of the display panel can more accurately reflect the change of the ambient light.
  • the present disclosure does not limit the specific method of controlling the luminous intensity of the display panel by the first control signal.
  • the self-luminous type display Panels such as OLED, etc.
  • the first control signal can be used to directly control the luminous brightness of the display panel;
  • the first control signal can be used to control the luminous brightness of the backlight layer to achieve the Control of luminous brightness.
  • FIG. 5 shows a schematic diagram of a display brightness control device according to an embodiment of the present disclosure.
  • the detection module 10 can be installed in the display panel, the control module 20 can be installed in the control chip (or called the multiplex control chip), and the detection module 10 can obtain the detection current through a newly-added connection line.
  • the detection current is transmitted to the control module 20 of the control chip, and the control module 20 obtains the first control signal according to the detection current to control the luminous brightness of the display panel.
  • control chip may include any one of a touch display drive chip, a fingerprint touch display drive chip, and a fingerprint display drive chip. That is, the control module 20 can reuse the control chip of the display panel itself to realize the control of the detection module and the control of the light-emitting brightness of the display panel, thereby saving cost.

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  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

一种显示亮度控制装置及电子设备，显示亮度控制装置应用于显示面板中，显示面板包括薄膜晶体管单元及发光单元，显示亮度控制装置包括：检测模块（10），包括薄膜晶体管单元中的多个薄膜晶体管，用于根据环境光亮度输出检测电流；控制模块（20），电连接于检测模块（10），用于根据检测电流控制发光单元的发光亮度。通过薄膜晶体管实现检测模块（10），并设置在显示面板的薄膜晶体管单元中，利用薄膜晶体管的感光特性对环境光亮度进行检测，占用空间小，在全面屏时无需挖空设置，工艺复杂度低，相较于相关技术具有低成本的特点，且可以提高用户体验。

Description

显示亮度控制装置及电子设备 技术领域
本公开涉及集成电路技术领域，尤其涉及一种显示亮度控制装置及电子设备。
背景技术
手机等电子设备包含环境光检测器，通过检测环境光亮度来自动调节显示屏的亮度。传统环境光检测是通过手机前端的光电传感器实现，这样需要单独的传感器，并压缩其它器件空间，而且当显示屏为全面屏时还需要专门挖空来放置光电传感器。这样会增加工艺复杂度，同时会降低用户体验。
发明内容
有鉴于此，本公开提出了一种显示亮度控制装置，所述装置应用于显示面板中，所述显示面板包括薄膜晶体管单元及发光单元，所述装置包括：
检测模块，包括所述薄膜晶体管单元中的多个薄膜晶体管，用于根据环境光亮度输出检测电流；
控制模块，电连接于所述检测模块，用于根据所述检测电流控制所述发光单元的发光亮度。
在一种可能的实施方式中，所述检测模块包括一个或多个检测单元，所述根据所述检测电流控制所述发光单元的发光亮度，包括：
根据所述一个或多个检测单元输出的检测电流，得到第一控制信号，以控制所述发光单元的发光亮度。
在一种可能的实施方式中，所述检测单元包括第一二极管、第一电容、第二电容、第一开关、第二开关，其中：
所述第一二极管的负极端电连接于所述第一开关的第一端和所述第一电容的第一端，所述第一开关的第二端电连接于所述第二开关的第一端及所 述第二电容的第一端，所述第一开关的控制端、所述第二开关的控制端及所述第二开关的第二端电连接于所述控制模块，所述第一二极管的正极端、所述第一电容的第二端、所述第二电容的第二端接地，
其中，所述第一二极管包括并联的多个薄膜晶体管。
在一种可能的实施方式中，所述控制模块包括第一运算放大器、第三电容、第三开关及第一控制单元，其中：
所述第一运算放大器的第一输入端电连接于所述第二开关的第二端、所述第三电容的第一端、所述第三开关的第一端，所述第一运算放大器的第二输入端用于输入基准信号，所述第一运算放大器的输出端电连接于所述第三电容的第二端、所述第三开关的第二端及所述第一控制单元，所述第三开关的控制端电连接于所述第一控制单元；
所述第一控制单元用于：
通过所述第一开关的控制端、所述第二开关的控制端、所述第三开关的控制端对所述第一开关、所述第二开关、所述第三开关的导通状态进行控制，以控制所述检测单元得到所述检测电流；
根据所述检测电流得到所述第一控制信号。
在一种可能的实施方式中，所述通过所述第一开关的控制端、所述第二开关的控制端、所述第三开关的控制端对所述第一开关、所述第二开关、所述第三开关的导通状态进行控制，以控制所述检测单元得到所述检测电流，包括：
在开始检测的第一时间段，导通所述第一开关、所述第三开关，并断开所述第二开关；
在达到所述第一时间段时，导通所述第二开关、断开所述第一开关及所述第三开关。
在一种可能的实施方式中，所述检测单元包括第二二极管、第三二极管、第四开关、第五开关、第一晶体管、第二晶体管，其中：
所述第二二极管的正极端电连接于所述第四开关的第一端，所述第四开 关的第二端电连接于所述第二晶体管的漏极及所述控制模块，
所述第三二极管的正极端电连接于所述第五开关的第一端，所述第五开关的第二端电连接于所述第一晶体管的漏极、所述第一晶体管的栅极及所述第二晶体管的栅极，
所述第四开关的控制端、所述第五开关的控制端电连接于所述控制模块，
所述第二二极管的负极端、所述第三二极管的负极端、所述第一晶体管的栅极、所述第二晶体管的栅极接地，
其中，所述第二二极管、所述第三二极管包括并联的多个薄膜晶体管，所述第三二极管被设置为无法被环境光照射。
在一种可能的实施方式中，所述控制模块包括第二运算放大器、第四电容、第六开关及第二控制单元，其中：
所述第二运算放大器的第一输入端电连接于所述第四开关的第二端、所述第二晶体管的漏极，所述第二运算放大器的第二输入端用于输入基准信号，所述第二运算放大器的输出端电连接于所述第四电容的第二端、所述第六开关的第二端及所述第二控制单元，所述第六开关的控制端电连接于所述第二控制单元；
所述第二控制单元用于：
通过所述第四开关的控制端、所述第五开关的控制端、所述第六开关的控制端对所述第四开关、所述第五开关、所述第六开关的导通状态进行控制，以控制所述检测单元得到所述检测电流；
根据所述检测电流得到所述第一控制信号。
在一种可能的实施方式中，所述通过所述第四开关的控制端、所述第五开关的控制端、所述第六开关的控制端对所述第四开关、所述第五开关、所述第六开关的导通状态进行控制，以控制所述检测单元得到所述检测电流，包括：
在开始检测的第二时间段，导通所述第六开关，并断开所述第四开关、所述第五开关；
在达到所述第二时间段时，导通所述第四开关、所述第五开关、断开所述第六开关。
在一种可能的实施方式中，所述控制模块设置于触控显示驱动芯片(Touch and Display Driver Integration，TDDI)、指纹触控显示驱动芯片(Fingerprint Touch and Display Driver Integration，FTDDI)、指纹显示驱动芯片(Fingerprint and Display Driver Integration，FDDI)的任意一种之中。
根据本公开的另一方面，提出了一种电子设备，所述电子设备包括：
所述的显示亮度控制装置；
显示面板。
在一种可能的实施方式中，所述显示面板包括液晶显示面板、发光二极管显示面板、有机发光二极管显示面板、微发光二极管显示面板的至少一种。
在一种可能的实施方式中，所述微发光二极管显示面板包括Mini LED或Micro LED。
本公开实施例的各个方面，通过薄膜晶体管实现检测模块，并设置在显示面的薄膜晶体管单元中，利用薄膜晶体管的感光特性对环境光亮度进行检测，占用空间小，在全面屏时无需挖空设置，工艺复杂度低，相较于相关技术具有低成本的特点，且可以提高用户体验。
根据下面参考附图对示例性实施例的详细说明，本公开的其它特征及方面将变得清楚。
附图说明
包含在说明书中并且构成说明书的一部分的附图与说明书一起示出了本公开的示例性实施例、特征和方面，并且用于解释本公开的原理。
图1示出了根据本公开一实施方式的显示亮度控制装置的框图。
图2示出了根据本公开一实施方式的显示亮度控制装置的框图。
图3示出了根据本公开一实施方式的显示亮度控制装置的示意图。
图4示出了根据本公开一实施方式的显示亮度控制装置的示意图。
图5示出了根据本公开一实施方式的显示亮度控制装置的示意图。
具体实施方式
以下将参考附图详细说明本公开的各种示例性实施例、特征和方面。附图中相同的附图标记表示功能相同或相似的元件。尽管在附图中示出了实施例的各种方面，但是除非特别指出，不必按比例绘制附图。
在这里专用的词“示例性”意为“用作例子、实施例或说明性”。这里作为“示例性”所说明的任何实施例不必解释为优于或好于其它实施例。
另外，为了更好的说明本公开，在下文的具体实施方式中给出了众多的具体细节。本领域技术人员应当理解，没有某些具体细节，本公开同样可以实施。在一些实例中，对于本领域技术人员熟知的方法、手段、元件和电路未作详细描述，以便于凸显本公开的主旨。
请参阅图1，图1示出了根据本公开一实施方式的显示亮度控制装置的框图。
所述显示亮度控制装置可以应用于显示面板中，所述显示面板包括薄膜晶体管单元及发光单元，如图1所示，所述装置包括：
检测模块10，包括所述薄膜晶体管单元中的多个薄膜晶体管(Thin Film Transistor，TFT)，用于根据环境光亮度输出检测电流；
控制模块20，电连接于所述检测模块10，用于根据所述检测电流控制所述发光单元的发光亮度。
本公开实施例提出的显示亮度控制装置，通过薄膜晶体管实现检测模块，并设置在显示面的薄膜晶体管单元中，利用薄膜晶体管的感光特性对环境光亮度进行检测，占用空间小，在全面屏时无需挖空设置，工艺复杂度低，相较于相关技术具有低成本的特点，且可以提高用户体验。
本公开对显示面板的具体类型不做限定，显示面板可以是自发光类型显示面板，也可以是背光类型显示面板，本领域技术人员可以根据需要选定。
在一个示例中，所述显示面板可以为自发光类型显示面板，例如有机发光二极管OLED显示面板，在这种情况下，所述发光单元可以指显示面板本身，控制模块20可根据检测电流控制显示面板的发光亮度；所述薄膜晶体管单元可以包括设置在基板上的多个薄膜晶体管。
在一个示例中，所述显示面板可以为背光类型显示面板，例如液晶显示面板，在这种情况下，所述发光单元可以指显示面板中的背光层，控制模块20可以根据检测电流控制背光层的发光亮度；所述薄膜晶体管单元可以包括设置在基板上的多个薄膜晶体管。
所述显示面板可以设置在电子设备中，所述电子设备也可以称为移动设备，移动设备可以指各种形式的接入移动设备、用户单元、用户设备、用户站、移动站、移动台(Mobile Station，MS)、远方站、远程移动设备、移动设备、用户移动设备、终端设备(terminal equipment)、无线通信设备、用户代理或用户装置。用户设备还可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的用户设备或者未来演进的公用陆地移动通信网络(Public Land Mobile Network，PLMN)中的移动设备等，本公开实施例对此并不限定。
请参阅图2，图2示出了根据本公开一实施方式的显示亮度控制装置的框图。
在一种可能的实施方式中，如图2所示，所述检测模块包括一个或多个检测单元110，所述根据所述检测电流控制所述发光单元的发光亮度，可以包括：
根据所述一个或多个检测单元110输出的检测电流，得到第一控制信号，以控制所述发光单元的发光亮度。
通过以上装置，本公开实施例可以通过一个或多个检测单元输出的检测电流，以对显示面板的发光亮度进行控制。
在一个示例中，可以采用多个检测单元110，将多个检测单元110分布在薄膜晶体管单元的多个位置，以得到多个检测电流，控制模块20可以根据每个检测电流得到一个控制信号，并综合多个控制信号得到所述第一控制信号以实现对显示面板的发光亮度的控制。这样，本公开实施例提出的显示亮度控制装置可以得到更加准确的第一控制信号，从而更好地适应环境光的变化。
当然，在其他实施方式中，也可以仅采用一个检测单元对环境光亮度进行检测，这样可以更好地缩减成本、更快地反应环境光亮度的变化。
本公开实施例中的检测单元110可以包括多种可能的实施方式，当检测模块10包括多个检测单元110时，每个检测单元110可以相同，也可以不同。下面将对检测单元110可能的实施方式进行示例性介绍。
请参阅图3，图3示出了根据本公开一实施方式的显示亮度控制装置的示意图。
在一种可能的实施方式中，如图3所示，所述检测单元110可以包括第一二极管D1、第一电容C1、第二电容C2、第一开关K1、第二开关K2，其中：
所述第一二极管D1的负极端电连接于所述第一开关K1的第一端和所述第一电容C1的第一端，所述第一开关K1的第二端电连接于所述第二开关K2的第一端及所述第二电容C1的第一端，所述第一开关K1的控制端、所述第二开关K2的控制端及所述第二开关K2的第二端电连接于所述控制模块(未示各个开关的控制端及其连接关系)，所述第一二极管D1的正极端、所述第一电容C1的第二端、所述第二电容C2的第二端接地，
其中，所述第一二极管D1包括并联的多个薄膜晶体管。
本公开实施例通过将多个薄膜晶体管并联以得到第一二极管D1，利用薄膜晶体管的感光特性，可以对环境光亮度进行检测。
在一种可能的实施方式中，如图3所示，所述控制模块20可以包括第一运算放大器A1、第三电容C3、第三开关K3及第一控制单元210，其中：
所述第一运算放大器A1的第一输入端电连接于所述第二开关K2的第二端、所述第三电容C3的第一端、所述第三开关K3的第一端，所述第一运算放大器A1的第二输入端用于输入基准信号VCM，所述第一运算放大器的输出端电连接于所述第三电容C3的第二端、所述第三开关K3的第二端及所述第一控制单元210，所述第三开关K3的控制端电连接于所述第一控制单元210；
所述第一控制单元210用于：
通过所述第一开关的控制端、所述第二开关的控制端、所述第三开关的控制端对所述第一开关K1、所述第二开关K2、所述第三开关K3的导通状态进行控制，以控制所述检测单元110得到所述检测电流；
根据所述检测电流得到所述第一控制信号。
在一种可能的实施方式中，第一控制单元210可以包括数模转换器、微处理器MCU、数字信号处理器DSP等，以将第一运算放大器A1输出的电压信号VCA转换为第一控制信号。
在一种可能的实施方式中，所述通过所述第一开关K1的控制端、所述第二开关K2的控制端、所述第三开关K3的控制端对所述第一开关K1、所述第二开关K2、所述第三开关K3的导通状态进行控制，以控制所述检测单元110得到所述检测电流，可以包括：
在开始检测的第一时间段，导通所述第一开关K1、所述第三开关K3，并断开所述第二开关K2；
在达到所述第一时间段时，导通所述第二开关K2、断开所述第一开关K1及所述第三开关K3。
在开始检测的第一时间段，当第一开关K1导通、第二开关K2断开时，可以对第二电容C2进行充电，而当第三开关K3导通时，可以对第一运算放大器A1进行置位。
在达到所述第一时间段时，导通所述第二开关K2、断开所述第一开关 K1及所述第三开关K3，第二电容C2开始放电，第一运算放大器A1的输出端输出电压信号VCA，其中，VCA＝i1*t1/C3，i1为电容C2放电时输入到第一运算放大器的第一输入端的电流大小(即检测电流)，t1为检测时间。
本公开实施例通过第一控制单元210对所述第一开关K1、所述第二开关K2、所述第三开关K3的导通状态进行控制，可以实现检测电流的采样并得到对应的电压信号，通过设置第一电容C1、第二电容C2，可以减小第三电容C3的大小，从而节约空间、成本。
在一个示例中，如果要控制第一运算放大器A1输出的电压VCA的变化在2V以内，第三电容要求至少为50pF，本公开实施例通过设置第一电容C1、第二电容C2可以将第三电容C3的大小降低为原来的1/10。
在一个示例中，第一电容C1的电容值可以为第二电容C2的电容值的9倍。
应该说明的是，本公开实施例对第一时间段的具体大小不做限定，本领域技术人员可以根据需要设置。
下面对检测单元110、控制模块20的其他可能实现方式进行介绍。
请参阅图4，图4示出了根据本公开一实施方式的显示亮度控制装置的示意图。
在一种可能的实施方式中，如图4所示，所述检测单元110包括第二二极管D2、第三二极管D3、第四开关K4、第五开关K5、第一晶体管Q1、第二晶体管Q2，其中：
所述第二二极管D2的正极端电连接于所述第四开关K4的第一端，所述第四开关K4的第二端电连接于所述第二晶体管Q2的漏极及所述控制模块20，
所述第三二极管D3的正极端电连接于所述第五开关K5的第一端，所述第五开关K5的第二端电连接于所述第一晶体管Q1的漏极、所述第一晶体管Q1的栅极及所述第二晶体管Q2的栅极，
所述第四开关K4的控制端、所述第五开关K5的控制端电连接于所述控制模块20(未示出各个开关的控制端及其与控制模块的连接关系)，
所述第二二极管D2的负极端、所述第三二极管D3的负极端、所述第一 晶体管Q1的栅极、所述第二晶体管Q2的栅极接地，
其中，所述第二二极管D2、所述第三二极管D3包括并联的多个薄膜晶体管，所述第三二极管D3被设置为无法被环境光照射。
本公开实施例通过并联的多个薄膜晶体管实现所述第二二极管D2、所述第三二极管D3，并设置所述第三二极管D3为无法被环境光照射，可以利用薄膜晶体管的感光特性对环境光进行检测，并且，利用第三二极管D3作为对照，可以消除薄膜晶体管本身存在的基础电流(base电流)，以提高信噪比。
在一种可能的实施方式中，如图4所示，所述控制模块20可以包括第二运算放大器A2、第四电容C4、第六开关K6及第二控制单元220，其中：
所述第二运算放大器A2的第一输入端电连接于所述第四开关K4的第二端、所述第二晶体管Q2的漏极，所述第二运算放大器A2的第二输入端用于输入基准信号VCM，所述第二运算放大器A2的输出端电连接于所述第四电容C4的第二端、所述第六开关K6的第二端及所述第二控制单元220，所述第六开关K6的控制端电连接于所述第二控制单元220(未示出控制端及连接关系)；
所述第二控制单元220可以用于：
通过所述第四开关K4的控制端、所述第五开关K5的控制端、所述第六开关K6的控制端对所述第四开关K4、所述第五开关K5、所述第六开关K6的导通状态进行控制，以控制所述检测单元110得到所述检测电流；
根据所述检测电流得到所述第一控制信号。
在一种可能的实施方式中，所述通过所述第四开关K4的控制端、所述第五开关K5的控制端、所述第六开关K6的控制端对所述第四开关K4、所述第五开关K5、所述第六开关K6的导通状态进行控制，以控制所述检测单元110得到所述检测电流，可以包括：
在开始检测的第二时间段，导通所述第六开关，并断开所述第四开关、所述第五开关；
在达到所述第二时间段时，导通所述第四开关、所述第五开关、断开所 述第六开关。
其中，在开始检测的第二时间段，本公开实施例通过导通所述第六开关，并断开所述第四开关、所述第五开关，以对第二运算放大器A2进行置位，在达到所述第二时间段时，本公开实施例通过导通所述第四开关、所述第五开关、断开所述第六开关以通过检测单元110得到检测电流，其中，第三二极管D3进行了光遮挡处理，可以输出基础电流，第二二极管D2感测环境光亮度输出第一电流，第一晶体管Q1和第二晶体管Q2组成的电流镜将第一电流和基础电流做差，以得到所述检测电流，由于该检测电流是去除了基础电流后得到的，因此，消除了误差干扰、提高了信噪比。
当然，本公开实施例是以第一晶体管Q1和第二晶体管Q2组成的电流镜为例对做差电路进行示例性说明，在其他实施方式中，做差电路也可以包括其他。
在一个示例中，在达到所述第二时间段时，导通所述第四开关、所述第五开关、断开所述第六开关，第二运算放大器A2的输出端输出的电压信号VCA＝i2*t2/C4，其中，i2表示检测单元110输出的检测电流(第一电流与基础电流的差电流)，t2表示单次检测时间，例如为1μs。如果要控制输出的电压信号VCA在2V以内，第四电容C4的电容值可以为10pF左右。
在一种可能的实施方式中，第二控制单元220可以包括数模转换器、微处理器MCU、数字信号处理器DSP等，以将第一运算放大器A1输出的电压信号VCA转换为第一控制信号。
在一种可能的实施方式中，第一控制单元210与第二控制单元220在得到电压信号VCA后，对电压信号VCA的处理方式可以相同，下面将对电压信号VCA的处理进行示例性介绍，应该明白，以下介绍适用于第一控制单元210与第二控制单元220。
在一种可能的实施方式中，在得到电压信号VCA后，本公开实施例可以对电压信号VCA进行模数转换以得到电压信号VCA对应的数字信号，该数字信号可以被存储在存储单元(例如SRAM)中，通过调用存储在在存储单元 中的预设光强查找表，可以得到该数字信号对应的环境光强度，利用得到的环境光强度可以得到第一控制信号。
其中，预设光强查找表可以包括电压(数字信号)与环境光强度的对应关系，因此，在得到电压后，可以利用电压查找到对应的环境光强度。
应该说明的是，本公开对通过查找到的环境光强度得到第一控制信号的具体实施方式不做限定，本领域技术人员可以根据相关技术确定。
在一种可能的实施方式中，当检测模块10包括多个检测单元时，可以得到多个控制信号，在这种情况下，本公开实施例可以对多个控制信号进行平均值运算等处理，以得到所述第一控制信号，从而使得显示面板的发光亮度更准确地反应环境光的变化。
当然，以上描述是示例性的，不应视为是对本公开的限制，在其他实施方式中，也可以对多个第一控制信号进行其他处理，对此本公开不做限定。
应该说明的是，由于显示面板包括多种，例如自发光型、背光型，因此，本公开对利用第一控制信号控制显示面板的发光强度的具体方式不做限定，例如，对于自发光型显示面板(例如OLED等)，可以利用第一控制信号直接控制显示面板的发光亮度；对于背光型显示面板(例如LCD等)，可以利用第一控制信号控制背光层的发光亮度以实现对显示面板的发光亮度的控制。
请参阅图5，图5示出了根据本公开一实施方式的显示亮度控制装置的示意图。
如图5所示，检测模块10可以设置于显示面板中，控制模块20可以设置于控制芯片中(或称为复用控制芯片)，检测模块10在得到检测电流时，通过新增的连接线将检测电流传输到控制芯片的控制模块20中，控制模块20根据检测电流得到第一控制信号以控制显示面板的发光亮度。
在一种可能的实施方式中，控制芯片可以包括触控显示驱动芯片、指纹触控显示驱动芯片、指纹显示驱动芯片的任意一种。即，控制模块20可以复用显示面板本身的控制芯片，以实现对检测模块的控制、显示面板的发光亮度的控制，从而可以节约成本。
以上已经描述了本公开的各实施例，上述说明是示例性的，并非穷尽性的，并且也不限于所披露的各实施例。在不偏离所说明的各实施例的范围和精神的情况下，对于本技术领域的普通技术人员来说许多修改和变更都是显而易见的。本文中所用术语的选择，旨在最好地解释各实施例的原理、实际应用或对市场中的技术的改进，或者使本技术领域的其它普通技术人员能理解本文披露的各实施例。

Claims (11)

  1. 一种显示亮度控制装置，其特征在于，所述装置应用于显示面板中，所述显示面板包括薄膜晶体管单元及发光单元，所述装置包括：
    检测模块，包括所述薄膜晶体管单元中的多个薄膜晶体管，用于根据环境光亮度输出检测电流；
    控制模块，电连接于所述检测模块，用于根据所述检测电流控制所述发光单元的发光亮度。
  2. 根据权利要求1所述的装置，其特征在于，所述检测模块包括一个或多个检测单元，所述根据所述检测电流控制所述发光单元的发光亮度，包括：
    根据所述一个或多个检测单元输出的检测电流，得到第一控制信号，以控制所述发光单元的发光亮度。
  3. 根据权利要求2所述的装置，其特征在于，所述检测单元包括第一二极管、第一电容、第二电容、第一开关、第二开关，其中：
    所述第一二极管的负极端电连接于所述第一开关的第一端和所述第一电容的第一端，所述第一开关的第二端电连接于所述第二开关的第一端及所述第二电容的第一端，所述第一开关的控制端、所述第二开关的控制端及所述第二开关的第二端电连接于所述控制模块，所述第一二极管的正极端、所述第一电容的第二端、所述第二电容的第二端接地，
    其中，所述第一二极管包括并联的多个薄膜晶体管。
  4. 根据权利要求3所述的装置，其特征在于，所述控制模块包括第一运算放大器、第三电容、第三开关及第一控制单元，其中：
    所述第一运算放大器的第一输入端电连接于所述第二开关的第二端、所述第三电容的第一端、所述第三开关的第一端，所述第一运算放大器的第二输入端用于输入基准信号，所述第一运算放大器的输出端电连接于所述第三电容的第二端、所述第三开关的第二端及所述第一控制单元，所述第三开关的控制端电连接于所述第一控制单元；
    所述第一控制单元用于：
    通过所述第一开关的控制端、所述第二开关的控制端、所述第三开关的 控制端对所述第一开关、所述第二开关、所述第三开关的导通状态进行控制，以控制所述检测单元得到所述检测电流；
    根据所述检测电流得到所述第一控制信号。
  5. 根据权利要求4所述的装置，其特征在于，所述通过所述第一开关的控制端、所述第二开关的控制端、所述第三开关的控制端对所述第一开关、所述第二开关、所述第三开关的导通状态进行控制，以控制所述检测单元得到所述检测电流，包括：
    在开始检测的第一时间段，导通所述第一开关、所述第三开关，并断开所述第二开关；
    在达到所述第一时间段时，导通所述第二开关、断开所述第一开关及所述第三开关。
  6. 根据权利要求2所述的装置，其特征在于，所述检测单元包括第二二极管、第三二极管、第四开关、第五开关、第一晶体管、第二晶体管，其中：
    所述第二二极管的正极端电连接于所述第四开关的第一端，所述第四开关的第二端电连接于所述第二晶体管的漏极及所述控制模块，
    所述第三二极管的正极端电连接于所述第五开关的第一端，所述第五开关的第二端电连接于所述第一晶体管的漏极、所述第一晶体管的栅极及所述第二晶体管的栅极，
    所述第四开关的控制端、所述第五开关的控制端电连接于所述控制模块，
    所述第二二极管的负极端、所述第三二极管的负极端、所述第一晶体管的栅极、所述第二晶体管的栅极接地，
    其中，所述第二二极管、所述第三二极管包括并联的多个薄膜晶体管，所述第三二极管被设置为无法被环境光照射。
  7. 根据权利要求6所述的装置，其特征在于，所述控制模块包括第二运算放大器、第四电容、第六开关及第二控制单元，其中：
    所述第二运算放大器的第一输入端电连接于所述第四开关的第二端、所述第二晶体管的漏极，所述第二运算放大器的第二输入端用于输入基准信号， 所述第二运算放大器的输出端电连接于所述第四电容的第二端、所述第六开关的第二端及所述第二控制单元，所述第六开关的控制端电连接于所述第二控制单元；
    所述第二控制单元用于：
    通过所述第四开关的控制端、所述第五开关的控制端、所述第六开关的控制端对所述第四开关、所述第五开关、所述第六开关的导通状态进行控制，以控制所述检测单元得到所述检测电流；
    根据所述检测电流得到所述第一控制信号。
  8. 根据权利要求7所述的装置，其特征在于，所述通过所述第四开关的控制端、所述第五开关的控制端、所述第六开关的控制端对所述第四开关、所述第五开关、所述第六开关的导通状态进行控制，以控制所述检测单元得到所述检测电流，包括：
    在开始检测的第二时间段，导通所述第六开关，并断开所述第四开关、所述第五开关；
    在达到所述第二时间段时，导通所述第四开关、所述第五开关、断开所述第六开关。
  9. 根据权利要求1所述的装置，其特征在于，所述控制模块设置于触控显示驱动芯片、指纹触控显示驱动芯片、指纹显示驱动芯片的任意一种之中。
  10. 一种电子设备，其特征在于，所述电子设备包括：
    如权利要求1～9任一项所述的显示亮度控制装置；
    显示面板。
  11. 根据权利要求10所述的电子设备，其特征在于，所述显示面板包括液晶显示面板、发光二极管显示面板、有机发光二极管显示面板、微发光二极管显示面板的至少一种。
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CN112951177A (zh) 2021-06-11
KR20220104044A (ko) 2022-07-25
EP4071748A4 (en) 2022-12-28
EP4071748A1 (en) 2022-10-12
CN112951177B (zh) 2022-09-02
US20220301520A1 (en) 2022-09-22
KR102631081B1 (ko) 2024-01-29
US11715443B2 (en) 2023-08-01

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