Temperature-Dependent Overdrive Circuit for LCD Panels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LCD panels face challenges in adjusting response time due to temperature variations, as the overdrive values stored in look-up tables (LUTs) do not account for temperature-dependent changes, leading to suboptimal image rendering across different temperatures.
Innovation Solution
A temperature-dependent overdrive circuit that includes multiple LUTs, temperature sensors, a control circuit, and an overdrive processor to generate adjusted image data by selecting the appropriate overdrive values and temperature correction coefficients based on sensed temperature data, ensuring accurate and flexible overdrive processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional LUT is used to store overdrive values, then the overdrive circuit can generate adjusted image data, but the response time adjustment is inaccurate under different temperatures
Solution Approach 1:
The single LUT is segmented into multiple LUTs, each storing overdrive values optimized for specific temperature ranges. The control circuit divides the temperature range into multiple segments and selects the appropriate LUT based on the sensed temperature, ensuring accurate overdrive values for each temperature condition.
Solution Approach 2:
The system dynamically selects different LUTs based on real-time temperature sensing. The control circuit adjusts the selection of overdrive values according to the current temperature, making the overdrive circuit adaptive and flexible to temperature variations rather than using fixed overdrive values.
2Adaptability or versatility
If multiple LUTs are used to store temperature-specific overdrive values, then temperature adaptability is improved, but the device complexity increases
Solution Approach 1:
Multiple LUTs are integrated into a single overdrive circuit structure, where each LUT serves a specific temperature range but all work together within the same circuit framework. The control circuit universally handles temperature sensing, LUT selection, and overdrive value generation, managing multiple functions within a unified design.
Solution Approach 2:
The control circuit acts as an intermediary between the temperature sensor and the multiple LUTs. It receives temperature data, determines the appropriate temperature range, selects the corresponding LUT, and outputs the appropriate overdrive values, thereby managing the complexity of coordinating multiple LUTs without requiring direct complex interconnections between them.
3Manufacturing precision
If temperature sensors and control circuits are added to select appropriate LUTs, then temperature-dependent overdrive accuracy is improved, but the manufacturing complexity increases
Solution Approach 1:
The system changes the parameter being controlled from fixed overdrive values to temperature-dependent overdrive values. By introducing temperature as a variable parameter and using temperature sensors to detect it, the system automatically adjusts the overdrive values according to temperature conditions, improving manufacturing precision without requiring manual calibration for different temperatures.
Solution Approach 2:
The overdrive circuit performs self-adjustment based on temperature sensing. The control circuit automatically selects the appropriate LUT and overdrive values based on the sensed temperature, eliminating the need for manual intervention or external calibration. The system serves itself by autonomously adapting to temperature changes.
Data Source
AI summary
A circuit for overdriving an LCD panel according to an image data and a temperature, and the corresponding are disclosed. The circuit includes: a memory for storing a previous image data; a plurality of LUTs, each coupled to receive the previous image data from the memory and a present image data, for storing overdrive values; a first temperature sensor, for sensing the temperature of a first area of the LCD panel to generate a first temperature data; a control circuit, for generating a selection signal and a temperature correction coefficient according to the first temperature data; a selection circuit, coupled to the plurality of LUTs, for selecting one LUT from the plurality of LUTs according to the selection signal and outputting the overdrive value of the selected LUT; and an overdrive processor, for generating adjusted image data according to the overdrive value and the temperature correction coefficient.