Display control method and device

A display control and pulse width modulation technology, applied to static indicators, instruments, etc., can solve problems such as partial display distortion, achieve high refresh rate, high display control, and simple scheme

CN101901578BActive Publication Date: 2012-08-29SHENZHEN SUNMOON MICROELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-08-29

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Abstract

The embodiment of the invention provides a display control method. The method comprises the following steps that: a basic clock inputs a counter, and the counter outputs a periodic digital signal; the periodical digital signal output by the counter enters a data gate through a logic combiner and a pulse width modulation PWM signal is output, wherein the duty ratio of the PWM signal is a preset threshold A; the highest updating frequency of the PWM signal is the preset threshold B; and output high pulses are distributed in a pulse width modulation standard period; and the PWM signal drives a light emitting diode LED for display control. According to the scheme provided by the invention, the pulse width modulation signal is generated at a higher frequency on the premise that the original data is not affected, so the display control at high updating frequency is realized. The scheme is realized simply and efficiently by logically combining the output of the counter and gating data.
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Description

technical field

[0001] The present invention relates to the field of digital communication, in particular, the present invention relates to a display control method and device. Background technique

[0002] How to control the brightness of LEDs, technology development from the initial analog dimming method to the current pulse width modulation pulse dimming method, and even now many applications can combine analog dimming and pulse width modulation pulse dimming. Analog dimming means that through the written data, the current flowing through the LED is adjusted to change the brightness of the LED. Pulse width modulation pulse dimming refers to adjusting the time width of LED on or off within a period of time. When the LED is turned on, it is driven by a fixed current, which can be set by an external resistor; when the LED is turned off, no current flows. In this way, the display effect within a certain period of time is that the brightness of the lamp has changed. And wit...

Examples

Embodiment Construction

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0032] Now people require that the display screen becomes clearer and clearer, and the content of the screen becomes more and more complex. That is to say, the data volume of the picture is getting larger and larger, and at the same time, a higher refresh rate of the flat panel display is required. Therefore, it is required that the flat panel display chip can generate a pulse width modulation pulse signal at a higher frequency without affecting the accuracy of the original data. The implementation of the traditional pulse width modulat...