Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-speed and high-precision control proposal and control circuit for LED (light emitting diode) brightness and color

A control circuit and brightness control technology, applied in the fields of LED display, circuit control, and integrated circuits, can solve the problems of complex and unrealizable circuits, and achieve the effects of high speed, reduced difficulty, and high production efficiency

Inactive Publication Date: 2011-04-13
惠州市科信达电子有限公司
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In special places, such as narrow space, due to the complexity of the circuit, it cannot be realized

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
  • High-speed and high-precision control proposal and control circuit for LED (light emitting diode) brightness and color
  • High-speed and high-precision control proposal and control circuit for LED (light emitting diode) brightness and color
  • High-speed and high-precision control proposal and control circuit for LED (light emitting diode) brightness and color

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0049] Such as Figure 4 The schematic diagram of driving current linear sweep-output luminous flux is shown. The input is a high-precision linear scanning current, and the output is the luminous flux of the LED, which are measured in RGB respectively, and the measurement data is expressed in a quantified form. Among them, the test curve of R LED can be represented by multi-segment broken lines ArBr, BrCr, CrDr, DrEr, ErFr, FrGr, GrHr, HrIr, etc.; the test curve of G LED can be represented by multi-segment broken lines AgBg, BgCg, CgDg, DgEg, EgFg, FgGg, GgHg , HgIg, etc.; B LED test curves can be represented by multi-segment broken lines AbBb, BbCb, CbDb, DbEb, EbFb, FbGb, GbHb, HbIb, IbJb, JbKb, etc.

[0050] The part with a higher rate of change of the curve is approximated by using more polylines.

[0051] The start of th...

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 relates to a high-speed and high-precision control proposal and control circuit for LED (light emitting diode) brightness and color as well as an algorithm. The control circuit comprises the following five parts: a single LED scanning and data matrix, a full color and RGB (red-green-blue) corresponding matrix, a brightness control equation, a driving current calibration, multi-line segment approximation and full color display matrix, and an integral circuit proposal. According to the scheme of the invention, various errors in the course of design and creation can be eliminated, and high consistency and high precision of the color and brightness control are achieved. Although the device precision of the used circuit board is 1% or much worse, and various errors exist between the circuit boards, through the implementation of the scheme, the color and brightness errors of each LED and each LED module are 0.1% or more.

Description

technical field [0001] The invention relates to the fields of integrated circuits, LED display and circuit control, in particular to the high-speed, high-precision and high-consistency control of RGB LEDs. Using a general-purpose MCU to control the circuit board, using advanced manufacturing technology, through the algorithm of integrating test and calibration data, and using simple table lookup and addition operations, the purpose of design is achieved. Background technique [0002] The current LED color display scheme considers the luminous efficiency of RGB LEDs to be consistent, or uses packaging equipment to use RGB LEDs with luminous efficiency errors within a certain range as the same LEDs; the drive current error of the drive circuit board is considered It is very small and can be ignored; the combination of driving current and LED is considered to be perfect, and the error will not be enlarged, so that the error of the display can be detected. [0003] The current ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00G09G3/32G01J1/00G01R19/00
Inventor 尹登庆廖启博樊亮
Owner 惠州市科信达电子有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com