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Method for adjusting LED (Light Emitting Diode) gray scale

A grayscale and amplitude technology, applied in the field of grayscale control of the display screen, can solve the problems that the display time cannot be infinitely small, cannot be infinitely large, and the image display cannot obtain good effects, etc., so as to improve the grayscale performance ability and level Clear, fine-grained images

Inactive Publication Date: 2012-01-25
SHENZHEN MOONCELL ELECTRIC
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  • Abstract
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  • Claims
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Problems solved by technology

Since the length of the display time is limited (neither infinitely small nor infinitely large), this pulse width modulation method cannot meet the demand when the display screen needs higher grayscale performance capability, so that the image display cannot obtain a good Effect

Method used

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  • Method for adjusting LED (Light Emitting Diode) gray scale
  • Method for adjusting LED (Light Emitting Diode) gray scale
  • Method for adjusting LED (Light Emitting Diode) gray scale

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Embodiment Construction

[0013] 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.

[0014] The core idea of ​​the present invention is to convert the unified constant current method adopted in the prior art (that is, the current through the LED remains constant from the beginning to the end during the adjustment process) into Step-type constant current mode (that is, during the adjustment process, the current through the LED remains unchanged after decreasing step by step), increasing the number of gray levels, thereby enhancing the image display effect of the display screen.

[0015] The grayscale adjustment method of the embodiment of the present invention is specifically as fol...

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Abstract

The invention provides a method for adjusting LED (Light Emitting Diode) gray scale. The method comprises the following step of: adjusting the LED gray scale by using a current modulation method for reducing current passing through an LED, wherein the reduction amplitude at each scale is 1 / 2. In the invention, a pulse width modulation method and a current modulation method are combined, so that the gray scale expression capacity of a display screen is improved; and compared with the prior art, the gray scale is improved by 2m times (m is number of scales for current adjustment), so that the an image displayed by the display screen is finer and smoother, the hierarchy is clearer and a visual effect is better.

Description

technical field [0001] The invention belongs to the technical field of gray level control of display screens, in particular to a method for adjusting the gray level of LEDs. Background technique [0002] The display screen is one of the important media for people to receive various information. As a multimedia display terminal, the display screen has an important index, that is, the number of gray scales that the display screen can display is also called the gray scale performance capability. The more gray scales the display can show, that is, the stronger the gray scale performance capability, the more delicate the displayed image, the clearer the image layers, and the better the visual perception for the human eye. The number of grayscale levels is related to the bit width of the grayscale data. Assuming that the bitwidth of the grayscale data is Nbit, the display can show 0~(2 N -1) Total 2 N At this time, it is also said that the display has Nbit grayscale performanc...

Claims

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Application Information

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IPC IPC(8): G09G5/02
Inventor 胡家同
Owner SHENZHEN MOONCELL ELECTRIC
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