Display Device Driving Control Circuit Assembly with Distinct Clock Frequencies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-speed clock signals from timing controllers and driving chips in LCD display devices often result in excessive electromagnetic interference due to shared clock frequencies, leading to EMC issues.
Innovation Solution
Implementing a display device driving control circuit assembly with a first and second timing controller, each transmitting signals with distinct clock frequencies, using spread-spectrum crystal oscillator frequency multipliers and point-to-point transmission units to embed and transmit timing control clocks, ensuring non-overlapping frequency ranges between the two.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed clock signals are used in timing controllers and driving chips to achieve high resolution and high refresh rate, then display performance is improved, but electromagnetic interference increases due to superimposition of energy at the same clock frequency
Solution Approach 1:
The patent changes the clock frequency parameter of at least one timing controller or driving chip to be different from the others. Specifically, it sets the clock frequency of the first timing controller to be different from the clock frequency of the second timing controller, and similarly for driving chips. This parameter differentiation prevents energy superimposition and reduces electromagnetic interference while maintaining high-speed operation for high refresh rates.
2Device complexity
If multiple timing controllers and driving chips operate at the same clock frequency to simplify system design, then device complexity is reduced, but electromagnetic interference becomes excessively high due to energy superimposition
Solution Approach 1:
The patent introduces frequency differentiation as a design parameter. It configures the first timing controller with a first clock frequency and the second timing controller with a second clock frequency, where the two frequencies are different. Similarly, driving chips are assigned different clock frequencies. This approach maintains relatively simple system architecture while effectively reducing electromagnetic interference through parameter diversification.
Data Source
AI summary
The present application provides a display device driving control circuit assembly and a display device. In the present application, a frequency of the first timing control clock of the first timing controller and a frequency of the second timing control clock of the second timing controller are different, as a result, a radiation intensity generated by the first timing controller and the second timing controller during operation is greatly reduced, thereby greatly reducing an intensity of electromagnetic compatibility.