Display Device Frame Frequency Conversion Circuit
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Solution Overview
Problem
Display devices, particularly liquid crystal displays, experience image quality degradation such as motion blur and flicker when switching frame frequencies, which existing technologies fail to fully address.
Innovation Solution
A display device with a frame frequency conversion circuit and timing control circuit that generates at least two display areas with different frame frequencies, allowing for smooth switching between them, including a third mode with varying selection periods to prevent frame drops and flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If frame frequency is increased to reduce motion blur, then display quality for moving images is improved, but image quality degradation such as frame drops and flicker occurs during switching
Solution Approach 1:
The patent applies dynamics by making the display device adaptable to different frame frequencies based on operating conditions. The system dynamically switches between first and second frame frequencies depending on temperature conditions, allowing the display to optimize motion blur reduction while maintaining stability. This resolves the contradiction by making the frame frequency variable rather than fixed, enabling the system to achieve high speed when needed while maintaining reliability through adaptive switching.
Solution Approach 2:
The patent changes the frame frequency parameter based on temperature conditions. When temperature is above a threshold, the system operates at a first frame frequency; when temperature is below the threshold, it switches to a second frame frequency. This parameter change approach allows the system to optimize display performance for moving images at higher frequencies while avoiding image quality degradation during switching by using lower frequencies under less optimal conditions.
2Productivity
If frame frequency switching is implemented to reduce motion blur, then moving image display performance is improved, but frame drops and flicker occur during the switching process
Solution Approach 1:
The patent applies preliminary action by detecting temperature conditions before initiating frame frequency switching. The system monitors temperature and only performs frame frequency switching when the temperature is above the threshold, ensuring optimal conditions for switching are met beforehand. This prevents frame drops and flicker by preparing the system in advance with suitable thermal conditions, thereby improving moving image display performance without compromising reliability.
Solution Approach 2:
The patent implements feedback by continuously monitoring temperature conditions and using this information to control frame frequency switching decisions. The temperature detection unit provides feedback to the control unit, which adjusts the frame frequency accordingly. This feedback mechanism ensures that switching occurs only under appropriate thermal conditions, preventing frame drops and flicker while maintaining high display performance for moving images.
3Speed
If high frame frequency is used to improve moving image display, then motion blur is reduced, but image quality degradation occurs under low temperature conditions
Solution Approach 1:
The patent changes the frame frequency parameter based on temperature conditions. When temperature is above a threshold, the system operates at a first frame frequency to reduce motion blur; when temperature is below the threshold, it switches to a second frame frequency to prevent image quality degradation. This parameter adaptation resolves the contradiction by optimizing frame frequency according to thermal conditions, ensuring reliable image quality across different temperature environments.
Data Source
AI summary
A display device includes a frame frequency conversion circuit configured to convert a frame frequency of an input display data and a timing control circuit configured to control a first drive circuit and a second drive circuit based on a frame frequency after the conversion. The display device generates at least two display areas on the display panel. The at least two display areas display images at different frame frequencies. The display device further includes a switch unit configured to display an image at the frame frequency before the conversion at one of the at least two display areas and configured to display an image at the frame frequency after the conversion at another one of the at least two display areas. At least one of a boundary position and a size of the at least two display areas varies with time.