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
CN102013225AInactive Publication Date: 2011-04-13惠州市科信达电子有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
惠州市科信达电子有限公司
Publication Date
2011-04-13
Estimated Expiration
Not applicable · inactive patent

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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.
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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

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