Interactive display device and method of LED (Light Emitting Diode) display driver

Abstract

The invention provides an interactive display device and method of an LED (Light Emitting Diode) display driver. Two paths of parallel triggers with enabled ends are arranged; a latch control signal is used for carrying out secondary timing sequence displacement and time delaying to be used as a clock signal to alternatively work, and a display data signal which is input at present is output to a selector; the selector takes the original latch control signal and the latch control signal subjected to the secondary timing sequence displacement to carry out logic AND operation and a result is output as a selection evidence, so as to realize the aim of carrying out stepless division on a digital display period and realizing interactive display controlled by a data encoding combination; the control to display time width can be realized in a data display requirement so as to realize the stepless division on the display period and a random division interval is generated according to requirements. According to the interactive display device and method disclosed by the invention, the data encoding combination control of output can be realized, and the refresh rate and gray scale representation of a display image can be improved in a display application.

Description

technical field [0001] The invention relates to the field of LED display driving, in particular to an LED display driving interactive display device and method. Background technique [0002] In digital display control, the gray level is expressed by its data bit width, such as 24-bit true color image, R / G / B three colors, each color is composed of 8-bit data, and can express 256 gray levels ; With the requirements of the development of display technology, such as brightness adjustment, color space conversion, GAMMA correction and other technical needs, 8-bit representation can no longer meet the actual requirements, and now each color data has expanded to 16-bit width. [0003] 1. Traditional LED display drive devices such as figure 1 As shown, the signal function of the device is described as follows: [0004] SCK: The input terminal of the clock signal, shifting data on the rising edge [0005] SDI: serial data input [0006] SDO: Serial data output terminal, which can ...

AI Technical Summary

Problems solved by technology

[0024] 3.1. Not suitable for the performance and application of high-level grayscale

Improve the / OE response speed, and the next problem is that the clock frequency SCK that can be stably transmitted on the LED display unit board PCB cannot exceed 30MHz frequency; if 10ns duty cycle control is generated, at least 50MHz clock frequency is required to control

[0036] 3.3. Use duty cycle control, loss of brightness

The duty cycle below 1 / 64 is no longer suitable for PWM control of traditional 16-bit constant current LED drivers

[0038] 3.4, the carrying area is limited

The loading area should not be too large, otherwise the display image refresh rate will be very low

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