Display Panel Differential Signaling for Temperature-Dependent Noise Control
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Solution Overview
Problem
Image display apparatuses experience panel noise due to temperature changes and electromagnetic noise, particularly at high and room temperatures, as the length of wiring from the timing controller to data drivers increases with higher panel resolutions.
Innovation Solution
The image display apparatus includes a timing controller that outputs differential signals with varying rising slopes and levels based on detected temperatures, using a temperature detector to adjust signal levels and slopes to reduce panel noise and electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the signal level from the timing controller is increased to reduce panel noise at high temperature, then panel noise is reduced, but electromagnetic noise is generated at room temperature
Solution Approach 1:
The timing controller dynamically adjusts the signal level based on detected temperature conditions. At high temperatures, the controller increases the signal level to overcome panel noise, while at room temperature, it maintains a lower signal level to avoid generating electromagnetic noise. This dynamic adaptation resolves the contradiction by making the signal level variable rather than fixed.
Solution Approach 2:
The patent changes the signal level parameter according to temperature conditions. The timing controller detects temperature and accordingly modifies the output signal characteristics - using a first signal level for high temperature operation and a second signal level for room temperature operation. This parameter change allows optimization for different operating conditions without causing harmful effects.
2Object-affected harmful factors
If the signal level from the timing controller is maintained at a low level to avoid electromagnetic noise, then electromagnetic noise is reduced, but panel noise increases at high temperature
Solution Approach 1:
The timing controller employs dynamic signal level adjustment based on real-time temperature detection. When high temperature is detected, the controller automatically increases the signal level to maintain adequate signal integrity and reduce panel noise. When room temperature is detected, it reduces the signal level to minimize electromagnetic noise generation. This dynamic behavior ensures optimal performance across different temperature conditions.
Solution Approach 2:
The patent implements parameter changes in the signal level based on temperature conditions. The timing controller uses a first signal level parameter for high temperature operation to reduce panel noise, and switches to a second signal level parameter for room temperature operation to reduce electromagnetic noise. This conditional parameter adjustment resolves the trade-off between the two types of noise.
Data Source
AI summary
An image display apparatus is disclosed. The image display device according to an embodiment of the present disclosure includes: a timing controller to output a differential signal; a plurality of data drivers to output a respective data signal based on the differential signal; a panel to output an image based on the respective data signal; and a temperature detector to detect a temperature of or around the panel, wherein the timing controller is configured to: in response to the temperature being a first temperature, output a first differential signal whose level increases based on a first rising slope; and in response to the temperature being a second temperature higher than the first temperature, output a second differential signal whose level increases based on a second rising slope greater than the first rising slope. Accordingly, it is possible to reduce panel noise based on a temperature change and electromagnetic noise.