WO2020191654A1 - 一种便携式探测显示设备 - Google Patents

一种便携式探测显示设备 Download PDF

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Publication number
WO2020191654A1
WO2020191654A1 PCT/CN2019/079858 CN2019079858W WO2020191654A1 WO 2020191654 A1 WO2020191654 A1 WO 2020191654A1 CN 2019079858 W CN2019079858 W CN 2019079858W WO 2020191654 A1 WO2020191654 A1 WO 2020191654A1
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Prior art keywords
film transistor
thin film
display device
control signal
capacitor
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PCT/CN2019/079858
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English (en)
French (fr)
Inventor
黄建军
张源
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深圳大学
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Application filed by 深圳大学 filed Critical 深圳大学
Priority to PCT/CN2019/079858 priority Critical patent/WO2020191654A1/zh
Publication of WO2020191654A1 publication Critical patent/WO2020191654A1/zh

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Classifications

    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/30—Transforming light or analogous information into electric information

Definitions

  • the invention relates to a display device, in particular to a portable detection display device, which belongs to the field of electronic technology.
  • Existing display equipment generally collects signals by the camera device in the display equipment, and the acquired signal is an analog signal, and then the analog signal needs to be converted into a digital signal by a digital-to-analog conversion device in the display equipment, and then the signal is converted into a digital signal by the display equipment.
  • the display device displays the collected signal according to the digital signal. Since such a display device requires a camera device, a digital-to-analog conversion device, and a display device, it requires a relatively high cost and is not easily portable.
  • a portable detection and display device with low cost and easy portability is provided.
  • the present invention provides a portable detection display device.
  • the detection display device includes at least one pixel circuit.
  • the pixel circuit includes a first thin film transistor (1), a second thin film transistor (2), a third thin film transistor (3), and a fourth thin film transistor.
  • the source of the first thin film transistor (1) is connected to the negative electrode of the photodiode (5), and the drain of the first thin film transistor (1) is connected to the power supply;
  • the drain of the second thin film transistor (2) is connected to the negative electrode of the photodiode (5), the source of the second thin film transistor (2) is connected to the first end of the first capacitor (6), and the third thin film transistor ( 3)
  • the drain of the first capacitor (6) is connected to the first terminal, and the source of the third thin film transistor (3) is connected to the gate of the fourth thin film transistor (4);
  • the source of the fourth thin film transistor (4) is connected to the input terminal of the display device (7), and the drain of the fourth thin film transistor (4) is connected to the power supply;
  • the gates of the first thin film transistor (1), the second thin film transistor (2), and the third thin film transistor (3) are connected to the first control signal, the second control signal, and the third control signal.
  • the control signal and the third control signal are used to control the on and off of the first thin film transistor (1), the second thin film transistor (2), and the third thin film transistor (3);
  • the second end of a capacitor (6) is grounded.
  • the pixel circuit further includes at least one voltage-capacity circuit, and the voltage-capacity circuit includes a fifth thin film transistor (8) and a second capacitor (9);
  • the source of the fifth thin film transistor (8) is connected to the source of the second thin film transistor (2), the gate of the fifth thin film transistor (8) is connected to the fourth control signal, and the drain of the fifth thin film transistor (8) It is connected to the first end of the second capacitor (9), the first end of the second capacitor (9) is also connected to the first end of the first capacitor (6), and the second end of the first capacitor (6) is grounded.
  • the display device (7) is a display device (7) such as LED, OLED, or Micro LED.
  • the first thin film transistor (1), the second thin film transistor (2), the third thin film transistor (3), and the fourth thin film transistor (4) are P-type thin film transistors or N-type thin film transistors.
  • the first control signal, the second control signal, and the third control signal in each pixel circuit in the detection display device are controlled by the array substrate row drive (Gate Driver on Array, GOA) circuit of each pixel circuit, so that The detection display device realizes the rolling shutter.
  • GOA Gate Driver on Array
  • the first control signal, the second control signal, and the third control signal in each pixel circuit in the detection display device are respectively connected to the first logic circuit, the second logic circuit, and the third logic circuit.
  • the second logic circuit and the third logic circuit respectively control the first control signal, the second control signal, and the third control signal according to the preset time sequence, so that the detection display device realizes the global shutter.
  • the present invention provides a portable detection display device.
  • the portable detection display device includes at least one pixel circuit.
  • the pixel circuit includes a first thin film transistor (1), a second thin film transistor (2), a third thin film transistor (3), and a Four thin film transistors (4), photodiodes (5), first capacitors (6) and display devices (7).
  • the photodiodes (5) are used to collect light signals, and the fourth thin film transistors (4) are based on light.
  • the signal controls the brightness of the display device (7).
  • the connection relationship of each device in the portable detection display device includes:
  • the source of the first thin film transistor (1) is connected to the negative electrode of the photodiode (5), the drain of the first thin film transistor (1) is connected to the power supply; the drain of the second thin film transistor (2) is connected to the photodiode
  • the negative electrode of the tube (5) is connected, the source of the second thin film transistor (2) is connected to the first end of the first capacitor (6); the drain of the third thin film transistor (3) is connected to the first terminal of the first capacitor (6)
  • One end is connected, the source of the third thin film transistor (3) is connected to the gate of the fourth thin film transistor (4); the source of the fourth thin film transistor (4) is connected to the input terminal of the display device (7), the fourth The drain of the thin film transistor (4) is connected to the power supply; the gates of the first thin film transistor (1), the second thin film transistor (2), and the third thin film transistor (3) are connected to the first control signal, the second control signal, and the Three control signal connections, the first control signal, the second control signal, and the third control signal are used to control the on and off of
  • the display device (7) (equivalent to a pixel) in each pixel circuit of the portable detection display device provided by the present invention can realize the brightness control of the display device (7) based on the light signal collected by the photodiode (5) .
  • the display devices (7) in each pixel circuit will form a pixel array. Since each display device (7) has different brightness, different images can be displayed in the pixel array. . Since the portable detection and display device provided by the present invention does not require a digital conversion device and a separate display device, the portable detection and display device has the characteristics of low cost and easy portability.
  • FIG. 1 is a schematic structural diagram of a portable detection display device provided by an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of another portable detection display device provided by an embodiment of the present invention.
  • VR glasses and similar equipment This kind of equipment is relatively cumbersome, cannot collect external environmental data, and has a single function. It requires an independent data conversion chip and an independent display screen to display external data. It is expensive and inconvenient to carry.
  • the present invention provides a portable detection display device, which includes at least one pixel circuit,
  • a pixel circuit is specifically introduced here, including: a first thin film transistor (1), a second thin film transistor (2), a third thin film transistor (3), a fourth thin film transistor (4), a photodiode (5), The first capacitor (6) and the display device (7).
  • the photodiode (5) is used to collect light signals
  • the fourth thin film transistor (4) controls the brightness of the display device (7) based on the light signals.
  • the gates of the first thin film transistor (1), the second thin film transistor (2), and the third thin film transistor (3) are connected to the first control signal, the second control signal, and the third control signal.
  • the control signal and the third control signal are used to control the on and off of the first thin film transistor (1), the second thin film transistor (2), and the third thin film transistor (3).
  • multiple pixel circuits can form an orderly arranged two-dimensional array, and the same control signals of these multiple pixel circuits are connected together and controlled by the external unit in accordance with the timing sequence, so that the orderly arranged pixel circuit two
  • the photodiode (5) in the dimensional array can collect light and integrate at the same time, and can realize global exposure.
  • Figure 1 is specifically:
  • the source of the first thin film transistor (1) is connected to the negative electrode of the photodiode (5), and the drain of the first thin film transistor (1) is connected to the power supply;
  • the drain of the second thin film transistor (2) is connected to the negative electrode of the photodiode (5), and the source of the second thin film transistor (2) is connected to the first end of the first capacitor (6);
  • the drain of the third thin film transistor (3) is connected to the first end of the first capacitor (6), and the source of the third thin film transistor (3) is connected to the gate of the fourth thin film transistor (4);
  • the source of the fourth thin film transistor (4) is connected to the input terminal of the display device (7), and the drain of the fourth thin film transistor (4) is connected to the power supply;
  • the anode of the photodiode (5) and the second end of the first capacitor (6) are grounded.
  • the display device (7) may be an LED or an OLED, a Micro LED or other display devices.
  • the working principle of the pixel circuit is: the first control signal and the second control signal can control the first thin film transistor (1) and the second thin film transistor (2) to be turned on, so as to charge the first capacitor (6);
  • the first thin film transistor (1) is controlled by the first control signal and the second control signal to turn off, and the second thin film transistor (2) remains on.
  • the photodiode (5) generates The current discharges the first capacitor (6), causing the voltage on the first capacitor (6) to decrease.
  • the second control signal controls the second thin film transistor (2) to turn off (at this time, the first capacitor (6) remains constant Voltage)
  • the third control signal controls the third thin film transistor (3) and the fourth transistor to turn on.
  • the current on the display device (7) is determined by the gate voltage of the fourth thin film transistor (4), namely Determined by the voltage of the first capacitor (6).
  • the working principle of the pixel circuit shows that the pixel circuit can realize a certain linear relationship between the light signal sampled by the photodiode (5) (5) and the brightness of the display device (7).
  • the display device (equivalent to a pixel) in each pixel circuit of the portable detection display device provided by the present invention can realize the control of the brightness of the display device based on the light signal collected by the photodiode (5).
  • the portable detection display device includes a plurality of pixel circuits, the display devices in each pixel circuit will form a pixel array. Since each display device has a different brightness, different images can be displayed in the pixel array. Since the portable detection display device provided by the present invention does not require a digital conversion device and a separate display device, the portable detection display device has the characteristics of low cost and easy portability.
  • the portable detection display device also includes at least one voltage-capacity circuit. It should be understood that the voltage-capacity circuits are in parallel. Here we mainly introduce the case of only one voltage-capacity circuit:
  • the portable detection display device shown in Figure 2 has an additional voltage-capacity circuit, which includes: a fifth thin film transistor (8) and a second capacitor (9), the source of the fifth thin film transistor (8) is connected to the source of the second thin film transistor (2), the gate of the fifth thin film transistor (8) is connected to the fourth control signal, and the fifth thin film transistor (8) ) Is connected to the first end of the second capacitor (9), the first end of the second capacitor (9) is also connected to the first end of the first capacitor (6), and the second end of the first capacitor (6) Ground.
  • a fifth thin film transistor (8) and a second capacitor (9) the source of the fifth thin film transistor (8) is connected to the source of the second thin film transistor (2), the gate of the fifth thin film transistor (8) is connected to the fourth control signal, and the fifth thin film transistor (8) ) Is connected to the first end of the second capacitor (9), the first end of the second capacitor (9) is also connected to the first end of the first capacitor (6), and the second end of the first capacitor (6) Ground.
  • the second capacitor can be turned on by the fourth control signal correspondingly to control the voltage output of the display device (7) in a reasonable range Inside, play a role in displaying the sampled signal.
  • the display device (7) is an LED, OLED, Micro LED, or other devices that can be used for display.
  • the first thin film transistor (1), the second thin film transistor (2), the third thin film transistor (3), and the fourth thin film transistor (4) may be P-type thin film transistors or N-type thin film transistors. .
  • the shutter is a mechanism used to control the effective exposure time.
  • the short exposure time is suitable for the global shutter, and the rolling shutter is more suitable when the exposure time is long. It can have lower noise and frame rate.
  • the embodiment of the present invention provides two other examples:
  • the first control signal, the second control signal, and the third control signal in each pixel circuit in the detection display device are controlled by the array substrate row drive (Gate Driver on Array, GOA) circuit of each pixel circuit. , So that the detection display device realizes a rolling shutter.
  • GOA Gate Driver on Array
  • Another example is: detecting the first control signal, the second control signal, and the third control signal in each pixel circuit in the display device are respectively connected to the first logic circuit, the second logic circuit, and the third logic circuit.
  • the logic circuit, the second logic circuit, and the third logic circuit respectively control the first control signal, the second control signal, and the third control signal according to a preset time sequence, so that the detection display device realizes a global shutter.
  • the rolling shutter is achieved by the row-by-row exposure of the sensor.
  • the sensor scans line by line for exposure until all pixels are exposed.
  • all actions are completed in a very short time.
  • the exposure time of pixels in different rows is different.
  • the global shutter is achieved by exposing the entire scene at the same time.
  • the sensor collects light at the same time and exposes at the same time, that is, when the exposure starts, the sensor starts to collect light; when the exposure ends, the light collection circuit is cut off. Then the sensor reads a picture.

Abstract

本发明公开了一种便携式探测显示设备，包括至少一个像素电路，像素电路中的各个器件的连接关系为：第一薄膜晶体管的源极、漏极分别与光电二级管的负极、电源连接，第二薄膜晶体管的漏极、源极分别与光电二级管的负极、第一电容的第一端连接，第三薄膜晶体管的漏极、源极分别与第一电容的第一端、第四薄膜晶体管的栅极连接，第四薄膜晶体管的源极、漏极分别与显示器件的输入端、电源连接，第一至第三薄膜晶体管的栅极分别与第一至第三控制信号连接，光电二级管的正极、第一电容的第二端接地。本发明公开了一种便携式探测显示设备，由于其不包括数字转换等设备，所用薄膜晶体管根据电路设计可以为NMOS或者PMOS，因此具有低成本、易便携的特点。

Description

一种便携式探测显示设备 技术领域
本发明涉及一种显示设备，尤其是一种便携式探测显示设备，属于电子技术领域。
 背景技术
现有的显示设备一般由显示设备中的摄像装置采集信号，采集得到的信号为模拟信号，之后还需要由显示设备中的数模转换装置将该模拟信号转换为数字信号，进而由显示设备中的显示装置根据数字信号显示采集信号，由于这样的显示设备需要摄像装置、数模转换装置、显示装置，因此需要较高的成本，同时也不易便携。
 技术问题
一种便携式探测显示设备，具有低成本、易便携的特点。
 技术解决方案
本发明提供一种便携式探测显示设备，探测显示设备包括至少一个像素电路，像素电路包括：第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）、第四薄膜晶体管（4）、光电二级管（5）、第一电容（6）以及显示器件（7）；光电二级管（5）用于采集光信号，第四薄膜晶体管（4）基于光信号控制显示器件（7）的亮度；
第一薄膜晶体管（1）的源极与光电二级管（5）的负极连接，第一薄膜晶体管（1）的漏极与电源连接；
第二薄膜晶体管（2）的漏极与光电二级管（5）的负极连接，第二薄膜晶体管（2）的源极与第一电容（6）的第一端连接，第三薄膜晶体管（3）的漏极与第一电容（6）的第一端连接，第三薄膜晶体管（3）的源极与第四薄膜晶体管（4）的栅极连接；
第四薄膜晶体管（4）的源极与显示器件（7）的输入端连接，第四薄膜晶体管（4）的漏极与电源连接；
第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）的栅极与第一控制信号、第二控制信号、第三控制信号连接，第一控制信号、第二控制信号、第三控制信号用于控制第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）的导通和关闭；光电二级管（5）的正极、第一电容（6）的第二端接地。
可选的，像素电路还包括至少一个容压电路，容压电路包括第五薄膜晶体管（8）、第二电容（9）；
第五薄膜晶体管（8）的源极与第二薄膜晶体管（2）的源极连接，第五薄膜晶体管（8）的栅极与第四控制信号连接，第五薄膜晶体管（8）的漏极与二电容（9）的第一端连接，第二电容（9）的第一端还与第一电容（6）的第一端连接，第一电容（6）的第二端接地。
可选的，显示器件（7）为LED、OLED或者Micro LED等显示器件（7）。
可选的，第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）、第四薄膜晶体管（4）为P型薄膜晶体管或者为N型薄膜晶体管。
可选的，探测显示设备中的各像素电路中的第一控制信号、第二控制信号、第三控制信号由各像素电路的阵列基板行驱动（Gate Driver on Array，GOA）电路控制，以使探测显示设备实现卷帘快门。
可选的，探测显示设备中各像素电路中的第一控制信号、第二控制信号、第三控制信号分别连接第一逻辑电路、第二逻辑电路、第三逻辑电路，第一逻辑电路、第二逻辑电路、第三逻辑电路按照预设时序时分别控制第一控制信号、第二控制信号、第三控制信号，以使探测显示设备实现全局快门。
 有益效果
本发明提供一种便携式探测显示设备，该便携式探测显示设备包括至少一个像素电路，像素电路包括：第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）、第四薄膜晶体管（4）、光电二级管（5）、第一电容（6）以及显示器件（7），光电二级管（5）用于采集光信号，第四薄膜晶体管（4）基于光信号控制显示器件（7）的亮度。该便携式探测显示设备中的各个器件的连接关系包括：
第一薄膜晶体管（1）的源极与光电二级管（5）的负极连接，第一薄膜晶体管（1）的漏极与电源连接；第二薄膜晶体管（2）的漏极与光电二级管（5）的负极连接，第二薄膜晶体管（2）的源极与第一电容（6）的第一端连接；第三薄膜晶体管（3）的漏极与第一电容（6）的第一端连接，第三薄膜晶体管（3）的源极与第四薄膜晶体管（4）的栅极连接；第四薄膜晶体管（4）的源极与显示器件（7）的输入端连接，第四薄膜晶体管（4）的漏极与电源连接；第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）的栅极与第一控制信号、第二控制信号、第三控制信号连接，第一控制信号、第二控制信号、第三控制信号用于控制第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）的导通和关闭；光电二级管（5）的正极、第一电容（6）的第二端接地。
本发明提供的便携式探测显示设备的每一个像素电路中的显示器件（7）（相当于一个像素）都能基于光电二级管（5）采集的光信号实现对显示器件（7）亮度的控制。在便携式探测显示设备包括多个像素电路时，各个像素电路中的显示器件（7）将构成像素阵列，由于每个显示器件（7）的亮度不同，因此可在像素阵列中显示出不同的图像。由于本发明提供的便携式探测显示设备不需要数字转换装置以及分离的显示装置，因此该便携式探测显示设备具有低成本、易便携的特点。
 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种便携式探测显示设备的结构示意图；
图2为本发明实施例提供的另一种便携式探测显示设备的结构示意图。
 本发明的实施方式
为使得本发明的发明目的、特征、优点能够更加的明显和易懂，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而非全部实施例。基于本发明中的实施例，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在介绍本发明提供的便携式探测显示设备之前，先介绍现有的一些显示设备：
（1）VR眼镜以及其相似的设备。此种设备比较笨重，无法采集外部环境数据，其功能也单一，需要独立数据转换芯片和独立显示屏来显示外部数据，具有价格昂贵、不便于携带的特点。
（2）Google眼镜以及其相似的设备。此种设备也比较笨重，需要独立的感光芯片和数据转换芯片来采集外部环境数据，同时需要独立的显示屏来显示外部数据，从而具有价格昂贵的特点，同时也不易便携。
为解决现有的显示设备具有的价格昂贵、不易便携的技术问题，本发明提供了一种便携式探测显示设备，该探测显示设备包括至少一个像素电路，
此处具体介绍一个像素电路，包括：第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）、第四薄膜晶体管（4）、光电二级管（5）、第一电容（6）以及显示器件（7）。其中，光电二级管（5）用于采集光信号，第四薄膜晶体管（4）基于光信号控制显示器件（7）的亮度。
第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）的栅极与第一控制信号、第二控制信号、第三控制信号连接，第一控制信号、第二控制信号、第三控制信号用于控制第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）的导通和关闭。
需要了解的是，多个像素电路可以组成有序排列的二维阵列，且这多个像素电路的相同控制信号都分别连接在一起由外部统一按照时序来控制，这样有序排列的像素电路二维阵列中的光电二级管（5）可以同时采光和积分，可以实现全局曝光。像素电路中的第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）、第四薄膜晶体管（4）、光电二级管（5）、第一电容（6）以及显示器件（7）的连接关系可参见图1所示，具体为：
第一薄膜晶体管（1）的源极与光电二级管（5）的负极连接，第一薄膜晶体管（1）的漏极与电源连接；
第二薄膜晶体管（2）的漏极与光电二级管（5）的负极连接，第二薄膜晶体管（2）的源极与第一电容（6）的第一端连接；
第三薄膜晶体管（3）的漏极与第一电容（6）的第一端连接，第三薄膜晶体管（3）的源极与第四薄膜晶体管（4）的栅极连接；
第四薄膜晶体管（4）的源极与显示器件（7）的输入端连接，第四薄膜晶体管（4）的漏极与电源连接；
光电二级管（5）的正极、第一电容（6）的第二端接地。
在另外的一些示例下，显示器件（7）可以为LED或者OLED，Micro LED 或其它显示器件。
像素电路的工作原理为：第一控制信号和第二控制信号可以控制第一薄膜晶体管（1）和第二薄膜晶体管（2）导通，实现对第一电容（6）的充电；当第一电容（6）充电结束时，由第一控制信号和第二控制信号控制使第一薄膜晶体管（1）关闭，第二薄膜晶体管（2）保持导通，此时光电二级管（5）产生的电流对第一电容（6）放电，导致第一电容（6）上的电压降低，之后，第二控制信号控制第二薄膜晶体管（2）关闭（此时第一电容（6）保持一定的电压量），第三控制信号控制使第三薄膜晶体管（3）和第四晶体管导通，此时，显示器件（7）上的电流由第四薄膜晶体管（4）的栅极电压决定，即由第一电容（6）的电压决定。像素电路的工作原理可知，像素电路可以实现光电二级管（5）（5）采样的光信号和显示器件（7）的亮度具有一定的线性关系。
本发明提供的便携式探测显示设备的每一个像素电路中的显示器件（相当于一个像素）都能基于光电二级管（5）采集的光信号实现对显示器件亮度的控制。在便携式探测显示设备包括多个像素电路时，各个像素电路中的显示器件将构成像素阵列，由于每个显示器件的亮度不同，因此可在像素阵列中显示出不同的图像。由于本发明提供的便携式探测显示设备不需要数字转换设备以及分离的显示装置，因此该便携式探测显示设备具有低成本、易便携的特点。
下文将基于上述实施例提供的便携式探测显示设备，介绍其他的一些便携式探测显示设备。
在另外一些示例下，便携式探测显示设备还包括至少一个容压电路，需要了解的是，容压电路之间是并联关系，此处主要介绍只有一个容压电路的情况：
请参见图2，图2所示的便携式探测显示设备与图1所示的便携式探测显示设备相比，多了一个容压电路，容压电路包括：第五薄膜晶体管（8）、第二电容（9），第五薄膜晶体管（8）的源极与第二薄膜晶体管（2）的源极连接，第五薄膜晶体管（8）的栅极与第四控制信号连接，第五薄膜晶体管（8）的漏极与二电容（9）的第一端连接，第二电容（9）的第一端还与第一电容（6）的第一端连接，第一电容（6）的第二端接地。
当光电二级管（5）的电流太大导致第一电容上的电压衰减太多时，可以相应的通过第四控制信号打开第二电容，以便控制显示器件（7）的电压的输出在合理范围内，起到显示采样信号的作用。
在另外的一些示例下，显示器件（7）为LED、OLED、Micro LED或者其它可用于显示的器件。
在另外的一些示例下，第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）、第四薄膜晶体管（4）可以为P型薄膜晶体管或者为N型薄膜晶体管。
需要了解的是，快门是用于控制有效曝光时间的机构，曝光时间短的适合全局快门，曝光时间长时卷帘快门更适合，可以有更低的噪声和帧速。基于此，本发明实施例提供了另外两种示例：
一种示例为：探测显示设备中的各像素电路中的第一控制信号、第二控制信号、第三控制信号由各所述像素电路的阵列基板行驱动（Gate Driver on Array，GOA）电路控制，以使所述探测显示设备实现卷帘快门。
另一种示例为：探测显示设备中各像素电路中的第一控制信号、第二控制信号、第三控制信号分别连接第一逻辑电路、第二逻辑电路、第三逻辑电路，所述第一逻辑电路、第二逻辑电路、第三逻辑电路按照预设时序时分别控制所述第一控制信号、第二控制信号、第三控制信号，以使所述探测显示设备实现全局快门。
需要了解的是，卷帘快门通过传感器逐行曝光的方式实现的。在曝光开始的时候，传感器逐行扫描逐行进行曝光，直至所有像素点都被曝光。当然，所有的动作在极短的时间内完成。不同行像元的曝光时间不同。
全局快门是通过整幅场景在同一时间曝光实现的。传感器同时收集光线，同时曝光，即在曝光开始的时候，传感器开始收集光线；在曝光结束的时候，光线收集电路被切断。然后传感器读出一幅照片。
需要说明的是，本领域技术人员应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的模块并不一定都是本发明所必须的。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其它实施例的相关描述，同时，上述本发明实施例序号仅仅为了描述，不代表实施例的优劣，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本发明的保护之内。

Claims (6)

  1. 一种便携式探测显示设备，其特征在于，所述探测显示设备包括至少一个像素电路，所述像素电路包括：第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）、第四薄膜晶体管（4）、光电二级管（5）、第一电容（6）以及显示器件（7）；所述光电二级管（5）用于采集光信号，所述第四薄膜晶体管（4）基于所述光信号控制显示器件（7）的亮度；
    所述第一薄膜晶体管（1）的源极与所述光电二级管（5）的负极连接，所述第一薄膜晶体管（1）的漏极与电源连接；所述第二薄膜晶体管（2）的漏极与所述光电二级管（5）的负极连接，所述第二薄膜晶体管（2）的源极与所述第一电容（6）的第一端连接，所述第三薄膜晶体管（3）的漏极与所述第一电容（6）的第一端连接，所述第三薄膜晶体管（3）的源极与所述第四薄膜晶体管（4）的栅极连接；
    所述第四薄膜晶体管（4）的源极与所述显示器件（7）的输入端连接，所述第四薄膜晶体管（4）的漏极与电源连接；
    所述第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）的栅极分别与第一控制信号、第二控制信号、第三控制信号连接，所述第一控制信号、第二控制信号、第三控制信号分别用于控制所述第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）的导通和关闭；所述光电二级管（5）的正极、所述第一电容（6）的第二端接地。
  2. 如权利要求1所述的探测显示设备，其特征在于，所述像素电路还包括至少一个容压电路，所述容压电路包括第五薄膜晶体管（8）、第二电容（9）；
    所述第五薄膜晶体管（8）的源极与所述第二薄膜晶体管（2）的源极连接，所述第五薄膜晶体管（8）的栅极与第四控制信号连接，所述第五薄膜晶体管（8）的漏极与所述二电容（9）的第一端连接，所述第二电容（9）的第一端还与所述第一电容（6）的第一端连接，所述第一电容（6）的第二端接地。
  3. 如权利要求1所述的探测显示设备，其特征在于，所述显示器件（7）为LED、OLED、Micro LED或者其它可用于显示的器件。
  4. 如权利要求1所述的探测显示设备，其特征在于，所述第一薄膜晶体管（1）、第二薄膜晶体管（2）、第三薄膜晶体管（3）、第四薄膜晶体管（4）为P型薄膜晶体管或者为N型薄膜晶体管。
  5. 如权利要求1所述的探测显示设备，其特征在于，所述探测显示设备中的各像素电路中的第一控制信号、第二控制信号、第三控制信号由各所述像素电路的阵列基板行驱动（Gate Driver on Array，GOA）电路控制，以使所述探测显示设备实现卷帘快门。
  6. 如权利要求1所述的探测显示设备，其特征在于，所述探测显示设备中各像素电路中的第一控制信号、第二控制信号、第三控制信号分别连接第一逻辑电路、第二逻辑电路、第三逻辑电路，所述第一逻辑电路、第二逻辑电路、第三逻辑电路按照预设时序时分别控制所述第一控制信号、第二控制信号、第三控制信号，以使所述探测显示设备实现全局快门。
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