Display Panel Temperature Profiling from Driving Chip Load Ratios
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Solution Overview
Problem
Heat generated by driving chips in display devices can increase the temperature of the display panel, potentially damaging it and leading to lower quality images due to varying load levels based on the pattern displayed.
Innovation Solution
A display device that includes a timing controller to determine data voltages for each driving chip, calculate load ratios, and generate a temperature profile by comparing maximum and minimum load patterns, allowing for adjustments to data voltages to manage heat effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If driving chips operate at high load to improve display performance, then display quality is improved, but heat generation increases causing temperature rise that damages the display panel and degrades image quality
Solution Approach 1:
The timing controller performs preliminary determination of data voltages and calculation of load ratios before the driving chips actually operate. By predicting the temperature profile in advance based on the determined load ratios and generating compensation values beforehand, the system prepares compensatory measures before the harmful temperature rise occurs, thereby preventing image degradation rather than reacting to it afterward
Solution Approach 2:
The system establishes a feedback loop where the timing controller continuously monitors the load ratios of driving chips, predicts the resulting temperature profiles, and adjusts data voltages accordingly. The compensation values generated based on predicted temperature profiles are fed back to adjust the operating parameters of driving chips, creating a closed-loop control system that dynamically balances display quality and temperature management
2Manufacturing precision
If data voltages are adjusted to compensate for heat effects, then image quality is maintained, but the complexity of the control system increases
Solution Approach 1:
The timing controller segments the control process into distinct functional modules: a data voltage determination unit that determines initial data voltages, a load ratio calculation unit that computes load ratios from determined voltages, and a compensation value generation unit that creates temperature compensation values. This segmentation allows each module to perform a specific function independently, making the overall complex system more manageable and easier to implement
Solution Approach 2:
The timing controller acts as an intermediary between the display control system and the driving chips. It introduces intermediate calculation steps (load ratio determination and temperature profile prediction) that mediate between the input display data and the final voltage output to driving chips. This intermediary role allows the system to manage complexity by centralizing the complex calculations in the timing controller while keeping the driving chips relatively simple
Data Source
AI summary
A display device includes a display panel including pixels, driving chips applying data voltages to the pixels through channels; and a timing controller determining the data voltages output from the channels by each of the driving chips based on input image data, determining a load ratio of each of the driving chips based on the data voltages, generating a current temperature profile of a first pixel row based on the load ratio of each of the driving chips, generating a current temperature profile of a second pixel row based on the load ratio of each of the driving chips, and generating a two-dimensional temperature profile based on the current temperature profiles of the first pixel row and the second pixel row.