Display Device Light Emission Timing Adjustment
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Solution Overview
Problem
Display devices, such as organic electroluminescence displays, face increased power consumption with higher brightness, leading to a flash phenomenon that deteriorates display quality, and existing methods to mitigate this, like frame memory, increase manufacturing costs.
Innovation Solution
A display device that adjusts light emission time for each frame based on calculated power consumption using a processor, driver, and controller, determining brightness adjustment magnification through a decreasing function to prevent flash phenomena without the need for frame memory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If brightness is increased to improve display quality, then display quality is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the light emission timing adjustable and adaptive. The controller dynamically adjusts the light emission timing based on the brightness of the current frame and the previous frame, allowing the system to optimize power consumption while maintaining display quality. This dynamic adjustment resolves the contradiction by enabling the display to operate at lower power consumption levels without sacrificing visual quality.
Solution Approach 2:
The patent changes the parameter of light emission timing based on brightness conditions. By modifying the emission timing parameter according to the brightness levels of consecutive frames, the system achieves a balance between power consumption and display quality. This parameter change allows the display to reduce power consumption when brightness levels are stable while maintaining quality when needed.
2Use of energy by moving object
If brightness is adjusted down to reduce power consumption, then power consumption is reduced, but flash phenomenon occurs that deteriorates display quality
Solution Approach 1:
The patent implements feedback by continuously monitoring the brightness of the current frame and the previous frame. The controller uses this feedback information to determine whether to adjust light emission timing, thereby preventing flash phenomena while maintaining power consumption reduction. The feedback mechanism ensures that brightness adjustments are made intelligently based on actual display conditions.
Solution Approach 2:
The system dynamically adjusts light emission timing based on real-time brightness comparisons between consecutive frames. This dynamic control prevents the flash phenomenon by adapting the emission timing to the actual brightness changes, thereby maintaining display quality while achieving power consumption reduction.
3Illumination intensity
If frame memory is added to prevent flash phenomenon, then display quality is maintained, but manufacturing cost increases
Solution Approach 1:
The patent extracts the frame memory component from the system by implementing an alternative solution using existing processors and controllers. Instead of adding hardware memory, the system uses software-based brightness comparison and timing adjustment logic that is already present in the display controller, thereby avoiding the manufacturing cost increase associated with frame memory while still preventing flash phenomena.
Solution Approach 2:
The patent replaces the expensive frame memory hardware with a cost-effective software-based solution using existing processor and controller resources. This approach uses disposable computational logic rather than persistent hardware memory, achieving the same functional result at lower manufacturing cost.
Data Source
AI summary
According to one embodiment, a display device displays an n−1th frame (n is an integer which is greater than or equal 2) and an nth frame in this order. The display device includes a display panel, calculator, adjuster, and controller. The calculator calculates power consumption of the n−1th frame. The adjuster determines whether or not the nth frame is brighter than the n−1th frame, and adjusts brightness of the nth frame based on a brightness adjustment magnification of the nth frame calculated based on the power consumption of the n−1th frame and a decreasing function, when the nth frame is not brighter than the n−1th frame. The controller stops light emission with an arbitrary timing when the nth frame is displayed, when the nth frame is brighter than the n−1th frame.