Unlock instant, AI-driven research and patent intelligence for your innovation.

Current mirror circuit, display drive circuit and display device

A current mirror and circuit technology, which is applied in the field of display devices, current mirror circuits, and display drive circuits, can solve the problems of large current mirror errors and difficulty in ensuring that Vds is completely phased, etc.

Active Publication Date: 2017-11-24
BOE TECH GRP CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Obviously, in the actual working process of the circuit, it is difficult to ensure that the V of each MOS tube ds are exactly equal, so the mirror error of the current is larger

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Current mirror circuit, display drive circuit and display device
  • Current mirror circuit, display drive circuit and display device
  • Current mirror circuit, display drive circuit and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0063] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or that other methods, components, materials, devices, steps, etc. may be employed. In other instances, well-known technical s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a current mirror circuit, a display drive circuit and a display device. The current mirror circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, an operational amplifier, a fifth transistor, a sixth transistor, a seventh transistor and an eighth transistor. Equivalence of a current ratio of an input end and an output end to a ratio of a width-length ratio of the first transistor and a width-length ratio of the third transistor can be guaranteed, current mirror errors are reduced, and current mirror precision is improved.

Description

technical field [0001] The present disclosure relates to the technical field of integrated circuits, and in particular to a current mirror circuit, a display driving circuit, and a display device. Background technique [0002] The current mirror circuit is the most basic circuit in the analog integrated circuit, which can mirror a given driving source current according to a certain ratio, so that the output current is exactly the same as the driving current. Current mirror circuits generally have high resolution, high output impedance, and high tracking speed when the input current changes. Therefore, current mirror circuits have been widely used in the design of analog and digital circuits. [0003] Such as figure 1 As shown, the cascode (cascode) current mirror circuit includes 4 MOS transistors. When all 4 MOS tubes are working in saturation state, according to the calculation formula of saturation current: [0004] where u is the mobility, is the aspect ratio, V ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 王糖祥宋琛
Owner BOE TECH GRP CO LTD