Panel Overdrive Voltage Control Using Built-In Temperature Sensing
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Solution Overview
Problem
Existing display panels require external temperature detectors and processing units to generate overdrive voltages, leading to high costs and limiting their application in narrow frame designs.
Innovation Solution
Incorporating a built-in temperature detector within the panel's controller to sense temperature and generate overdriving voltages based on lookup information, eliminating the need for external components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external temperature detector and external processing unit are used to generate overdrive voltage, then temperature sensing and overdrive voltage generation can be achieved, but device complexity and cost increase
Solution Approach 1:
The patent combines the temperature detector and processing unit functions into the display driver integrated circuit itself. The driver IC includes a temperature sensing unit and a processing unit that work together within the same chip to sense temperature and generate overdrive voltages, eliminating the need for separate external components while maintaining reliable temperature sensing capability
Solution Approach 2:
The display driver IC is designed to perform multiple functions: it serves as both the display driving circuit and the temperature sensing system. The processing unit within the driver IC can process both display control signals and temperature sensing data, making the system more versatile and reducing overall device complexity
2Measurement precision
If external temperature detector and processing unit are used, then accurate temperature sensing is achieved, but manufacturing cost increases
Solution Approach 1:
By integrating the temperature detector and processing unit into the display driver IC, the patent reduces the total component count and assembly steps required for manufacturing. This integration lowers manufacturing costs while maintaining accurate temperature measurement capability through the dedicated sensing and processing units within the driver IC
Solution Approach 2:
The display driver IC performs its own temperature sensing and processing functions without requiring external assistance. The driver IC autonomously senses the display panel temperature and generates appropriate overdrive voltages, eliminating the need for additional external components and reducing manufacturing complexity and cost
3Device complexity
If built-in temperature detector is used in controller, then cost is reduced and narrow frame application is enabled, but temperature sensing function must be integrated into existing controller
Solution Approach 1:
The processing unit within the display driver IC is designed to handle multiple types of data processing, including both display control operations and temperature sensing operations. This multi-functional capability allows the controller to integrate temperature sensing without requiring separate dedicated processing hardware, facilitating narrow frame applications while managing integration complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces costs and enables the panel to be used in narrow frame applications while improving display performance by reducing response time and addressing issues like mura and burn-in.
Implementation Method 1
A built-in temperature detector of the controller senses temperature of the panel to generate a sensing temperature value
Data Source
AI summary
A method for generating overdriving voltage based on temperature of panel is disclosed. The method includes the following steps. A built-in temperature detector of a controller senses temperature of the panel to generate a sensing temperature value. Alternatively, the controller calculates a sensing temperature value, according to lookup information and raw data. The raw data is obtained according to touch sensing signals output from multiple touch sensors. Then, the controller generates an overdriving voltage, according to the sensing temperature value and another lookup information. The controller outputs the overdriving voltage to the pixel circuit.