LCD Gate Drive Control for Low-Temperature Blur Suppression
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Solution Overview
Problem
Existing liquid crystal display devices experience image blurring at low temperatures due to the increased time required for the liquid crystal layer to respond to image signals, which is exacerbated by doubling the frame frequency to suppress blurring, leading to image quality deterioration.
Innovation Solution
A display device and control method that utilize a display device and a control method that utilize a display device and a control method that includes a display panel with a liquid crystal layer driven by pixel electrodes, a backlight, transistors, gate lines, and a temperature sensor to adjust the backlight's operation of the device's operation, leveraging the gate signals and the operation of the device's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frame frequency is doubled to suppress image blurring at low temperatures, then image blurring is reduced, but the write time per pixel row is reduced leading to deterioration in image quality
Solution Approach 1:
The gate drive circuit dynamically adjusts the number of gate lines driven per horizontal synchronization signal cycle based on detected temperature. At low temperatures, it increases the number of gate lines per cycle to maintain adequate write time, while at higher temperatures it can drive fewer gate lines per cycle. This dynamic adaptation resolves the contradiction between preventing image blurring and maintaining image quality across different temperature conditions.
2Duration of action of moving object
If the number of gate lines supplied with gate signals in one horizontal synchronization signal cycle is increased, then the write time is extended allowing for lower frame frequencies, but the liquid crystal layer response time becomes insufficient causing image blurring
Solution Approach 1:
The system changes the parameter of gate line driving configuration based on temperature conditions. Specifically, it adjusts the number of gate lines supplied with gate signals per horizontal synchronization signal cycle according to the liquid crystal layer's temperature-dependent response characteristics. This parameter adaptation allows the system to optimize both write time and liquid crystal response time under varying temperature conditions, preventing image blurring while maintaining adequate write duration.
Data Source
AI summary
A display device includes a control circuit and a temperature sensor. The control circuit causes a gate drive circuit to transmit gate signals to a plurality of gate lines during a light-out period which is a period other than a lighting period in one cycle of a vertical synchronization signal. When a temperature detected by the temperature sensor is lower than a first threshold temperature, the control circuit sets a setting number, which is the number of gate lines supplied with the gate signals from the gate drive circuit in one cycle of a horizontal synchronization signal, to a first number that is greater than one.