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

LED display screen drive output blanking clamp circuit and LED display screen

A technology of LED display and drive output, applied in static indicators, instruments, etc., can solve the problems of dark first line, lower ghost, bright short-circuit line, etc.

Pending Publication Date: 2018-11-06
SHENZHEN FM ELECTRONICS GRP CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an LED display drive output blanking clamping circuit, aiming to solve the problems of ghosting, darkening of the first row and short-circuit row brightening in the LED display blanking control circuit in the traditional technical solution

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
  • LED display screen drive output blanking clamp circuit and LED display screen
  • LED display screen drive output blanking clamp circuit and LED display screen
  • LED display screen drive output blanking clamp circuit and LED display screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0017] figure 1 It shows the block diagram of the LED display drive output blanking clamping circuit provided by the preferred embodiment of the present invention. For the convenience of description, only the parts related to this embodiment are shown, and the details are as follows:

[0018] refer to figure 1 , an LED display drive output blanking clamp circuit, comprising: a constant current drive module 10 and a first blanking module 20.

[0019] Wherein, the constant current driving module 10 is connected with the LED display screen, and has a first output terminal that outputs a driving sign...

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

An LED display screen drive output blanking clamp circuit includes: a constant current driving module which is connected to an LED display screen and has an output driving signal for driving a first output end of the LED display screen; and a first blanking module which is connected to a reference voltage signal and a blanking drive signal associated with a drive signal level state, and performs clamping on the output voltage of the first output end by using the reference voltage signal. The drive output blanking clamp circuit has the functions of pull-up control and pull-down control by the first blanking module and the constant current driving module; the output blanking pull-up level is precise and adjustable, pull-up can solve the problem of low ghost shadows, and the pull-down clamp can avoid the darkness of the first line; and the output voltage of the first output end of the constant current driving module can be controlled to be dynamically adjusted, which solves the problem that an output short-circuit line is bright.

Description

technical field [0001] The invention belongs to the technical field of LED display drive control, in particular to an LED display drive output blanking clamp circuit and an LED display. Background technique [0002] The row line and column line of the LED (Light Emitting Diode, light emitting diode) display screen have improper potential due to the parasitic capacitance, so that the LED driver chip will generate upper ghost images during row scanning, and generate lower ghost images during column driving. At present, after the column driver is turned off, the column is pulled up, the parasitic capacitance of the column is charged, and the output voltage is directly pulled up to the DC power supply, which effectively solves the problem of ghosting, but it also brings the first row New problems such as dimming and short-circuiting. [0003] Therefore, the LED display blanking control circuit in the traditional technical scheme has the problems of the first row being dark and ...

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): G09G3/32
CPCG09G3/32
Inventor 李科举
Owner SHENZHEN FM ELECTRONICS GRP CO LTD