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Backlight control method applied to display device

A backlight control and display device technology, which is applied in the fields of components, circuits, display devices, backlight control, and light-emitting units, can solve the problem of low gray scale control accuracy, and achieve the effect of improving gray scale control ability and smooth current-voltage curve

Active Publication Date: 2021-09-17
TCL CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiments of the present invention provide a light-emitting unit, component, circuit, display device, and backlight control method, aiming to solve the problem of low gray scale control accuracy in the prior art

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  • Backlight control method applied to display device
  • Backlight control method applied to display device
  • Backlight control method applied to display device

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Embodiment Construction

[0037] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the embodiment of the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0038] The terms "comprising" and any variations thereof in the description and claims of the present invention and the above drawings are intended to cover non-exclusive inclusion. For example, a process, method or system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also inc...

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Abstract

A light emitting unit includes a first switch tube, a second switch tube, an LED chip, a first storage capacitor and a first resistor, the gate of the first switch tube is a scan signal, and the source of the first switch tube is a data signal , the positive electrode of the LED chip is the power signal input end, the drain of the second switch tube is connected to the first end of the first resistor, and the second end of the first resistor is grounded. Adding a resistor in series with the switch tube that drives the LED makes the current-voltage curve of the switch tube more gentle. For the same current range, the corresponding new voltage control range becomes larger, which can achieve higher precision. Modulation, so as to improve the gray level control ability of LED.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a light emitting unit, a component, a circuit, a display device and a backlight control method. Background technique [0002] At present, most LED backlight technologies are driven in a static or passive manner. Compared with this traditional technology, the TFT (Thin Film Transistor, thin film transistor) backplane can drive light-emitting elements in an active way, which has the advantages of high contrast and energy saving, and is often used to drive LCD panels or OLED (Organic Light-Emitting Diode, organic LED) panel. [0003] For example, in the active driving circuit of the 2T1C (2 switch tubes + 1 capacitor) pixel unit in the display panel, the switch tubes connected in series with the LEDs need to withstand relatively large current. However, due to the limited voltage control accuracy of the drive circuit, the current can be controlled more accurately in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34G09G3/36
CPCG09G3/3413G09G3/3648
Inventor 林智远陈光郎马刚谢相伟闫晓林
Owner TCL CORPORATION
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