LED (Light-Emitting Diode) display screen pulse control method capable of eliminating dynamic false contour

A technology of LED display and dynamic false contour, which is applied to static indicators, instruments, etc., can solve problems such as wrong display content, achieve the effect of concentrating the luminous time and avoiding the phenomenon of dynamic false contour

Active Publication Date: 2015-04-29
XIAN NOVASTAR TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the existing pulse width modulation method, the sub-fields corresponding to each data bit of the display code are fixedly set bit by bit in order in the entire gray field corresponding to the display code, and the pulses of each data bit are realized in turn; in this way, the successively realized display The pulses are connected end to end, causing the human eyes to perceive wrong display content during the process of display data transformation

Method used

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  • LED (Light-Emitting Diode) display screen pulse control method capable of eliminating dynamic false contour
  • LED (Light-Emitting Diode) display screen pulse control method capable of eliminating dynamic false contour
  • LED (Light-Emitting Diode) display screen pulse control method capable of eliminating dynamic false contour

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Embodiment Construction

[0025] Such as figure 2 , Figure 5 A specific embodiment of the present invention is shown, the embodiment is to set the fractional field at the middle position of the entire gray field. The specific method is as follows:

[0026] On the basis of the existing gated pulse width modulation technology, according to the binary code of the input gray level, the input gray level bits are divided into two parts according to the pulse width, and the integer weight bits (bits whose pulse width is greater than one subfield) and fractional weight bits (bits with a pulse width less than one subfield);

[0027] The fractional weight bit is still implemented according to the existing pulse width modulation method, but the position of the implementation is changed, such as figure 2 As shown, the decimal place is no longer implemented at the beginning or end of a field, but in the middle of a field;

[0028] The integer weight bit does not divide the weight, and calculates the number N...

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Abstract

The invention provides an LED (Light-Emitting Diode) display screen pulse control method capable of eliminating a dynamic false contour, which can be used for improving a dynamic false contour phenomenon existing in an LED display screen during playing of moving pictures. The method comprises the following steps of: sequentially realizing all decimal weight bits at a certain fixed position in an entire gray-scale field, and marking a plurality of sub-fields occupied by the fixed position as a decimal field as a whole; and integrating each pulse needed by the realization of all integer weight bits into a wide pulse, and realizing the wide pulse at a position which is adjacent to the decimal field to complete brightness control over an LED lamp point. Due to the adoption of the LED display screen pulse control method provided by the invention, the phenomenon of sensing of wrong brightness is avoided through visual integration when two gray scales which are realized successively are seen by human eyes; and the difference between an integration result and an original gray scale is not too large, so that the occurrence of the dynamic false contour is avoided effectively.

Description

technical field [0001] The invention is applied to an LED display screen that uses a pulse width modulation method to control the brightness of a lamp point, and relates to a pulse control method for improving the display effect of a moving picture on the LED display screen. Background technique [0002] With the wide application of LED display screens, the requirements for picture quality are becoming more and more stringent. However, when displaying video pictures, bright or dark lines other than the outline information of the image itself will be observed on the image, which is called dynamic false outline. (dynamic false contour DFC). [0003] Gated pulse width modulation is one of the main methods to control the gray level at present. According to the received binary code to be displayed, the sub-fields arranged in a certain order are sequentially lit with a set duty cycle to achieve different gray levels. level (each bit of gated PWM corresponds to at least one subfie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32
Inventor 赵小明李慧赵园美郑瑞涛
Owner XIAN NOVASTAR TECH
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