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A kind of multi-line scan line feed display method and chip

A line display and chip technology, applied in the field of multi-line scan and line feed display methods and chips, can solve the problems of low grayscale clock GCLK frequency, poor display picture quality, inability to display high grayscale levels, etc., so as to improve the display grayscale. Level, Dependency Reduction, Enhanced Display Effect

Active Publication Date: 2022-03-29
PURESEMI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For the multi-line scanning constant current source chip in the prior art, it is necessary to input the gray clock GCLK from the chip to realize the line-wrapping display operation. The frequency of the gray clock GCLK is not high, and it cannot display high gray levels when the number of line scans is high. , poor display picture quality, etc., the present invention provides a multi-line scan line-feed display method and chip, through the control card to generate an independent line-feed signal to switch between different lines; the grayscale clock GCLK is generated inside the chip, so that it can display The gray level is greatly improved, and the display effect of the screen is also improved. The line feed signal captures the scanned data at the same time, reducing the waste of idle time, and improving the time utilization rate and display refresh rate.

Method used

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  • A kind of multi-line scan line feed display method and chip
  • A kind of multi-line scan line feed display method and chip
  • A kind of multi-line scan line feed display method and chip

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Embodiment 1

[0040] Figure 4 Shown is a schematic diagram of line feed timing in the prior art, where the grayscale clock GCLK is sent to the chip by an external control card. The principle of line-wrapping display in the prior art is not to display data when the grayscale clock GCLK is not received, and to display the data of this line when the grayscale clock GCLK is received, so as to realize the display of multiple lines of data. This method is limited by external hardware factors such as the layout and wiring of the PCB board, and the frequency of the grayscale clock GCLK cannot be made very high. According to the formula: grayscale = grayscale clock GCLK frequency / (frame frequency * line scan number ), the gray-scale clock GCLK remains unchanged, and when the line scan number increases, the gray-scale level decreases. And the existing technology is equivalent to relying on the external grayscale clock GCLK for line feed and display, which requires high PCB board manufacturing. Fo...

Embodiment 2

[0052] This embodiment introduces its gray scale data display method in detail based on the constant current chip described in Embodiment 1.

[0053] figure 1 A schematic flow chart of the display method for the constant current chip, including the following steps:

[0054] Step 1: The external control card generates a high-level pulse signal to the chip as a line feed signal. The width of the high-level pulse signal is N data clock DCLK cycles, and N is an integer not less than the number of channels of the multi-line sweep constant current chip. . Figure 5 For the timing diagram of line feed display in the present invention, taking a 16-channel constant current chip as an example, the number of channels is 16, so the minimum high pulse width of the line feed signal is 16 data clock DCLK clock cycles.

[0055] The pulse width of the line feed signal is set according to the number of channels of the multi-line scanning constant current chip. When displaying, the data of eac...

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Abstract

The invention discloses a multi-line scanning and line-changing display method and a chip, which belong to the technical field of LED display. For the multi-line scanning constant current source chip in the prior art, it is necessary to input the gray clock GCLK from the chip to realize the line-wrapping display operation. The frequency of the gray clock GCLK is not high, and it cannot display high gray levels when the number of line scans is high. , poor display picture quality, etc., the present invention provides a multi-line scan and line-feed display method and chip, which can realize the switching of different lines through the independent line-feed signal generated by the control card, to update the data of different lines; The gray-scale clock GCLK is generated inside the chip, which greatly increases the upper limit of the frequency of the gray-scale clock GCLK, so that the gray scale that can be displayed is greatly improved, and the display effect of the screen is also greatly improved. The line feed signal is captured at the same time Scan data, reduce the waste of idle time, improve time utilization and display refresh rate.

Description

technical field [0001] The invention relates to the technical field of LED display, and more specifically, to a multi-line scanning and line-changing display method and a chip. Background technique [0002] As a new type of lighting material, LED has the advantages of long life, low power consumption, small size, safety and reliability. At present, it has been widely used in lighting, display screen and other equipment. With the development of small-pitch LED technology and gray-scale modulation technology, LED display screens can now display more delicate and realistic images and pictures. The LED display screen with small dot pitch will place more light-emitting diodes on a relatively small lamp board. light emitting diodes. [0003] In the design of multi-line scanning constant current source chip, two clock signals are generally sent to the chip through the control card outside the chip, one is the clock for sampling grayscale data and register data, and the frequency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32
CPCG09G3/32G09G2320/0271
Inventor 张若平宋霄蒋召宇何书专
Owner PURESEMI CO LTD
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