Display Device Frame Segmentation for Power Reduction
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Solution Overview
Problem
Existing display devices do not effectively reduce electric power consumption during scanning periods, leading to increased energy usage and potential degradation of display quality due to luminance gradients.
Innovation Solution
A display device configuration where scanning and pause periods are alternated between consecutive frames, with the pause period set to an entire frame and the scanning period set to a shorter duration within the preceding frame, effectively reducing self-consumed electric current and preventing luminance gradient degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a single pause period is set to a single frame, then electric power consumption is reduced, but the scanning period cannot be shortened further
Solution Approach 1:
The patent divides the frame structure into two separate frames: a first frame containing both scanning and pause periods, and a second frame containing only a pause period. This segmentation allows the pause functionality to be extended across frame boundaries, effectively lengthening the pause period without compromising scanning performance. The scanning period can be shortened within the first frame while maintaining adequate display refresh, and the extended pause in the second frame provides additional power savings.
2Loss of energy
If the scanning period is shortened, then self-consumed electric current is reduced, but the polarity reversal period becomes shorter causing luminance gradient
Solution Approach 1:
The patent implements a periodic driving scheme where scanning alternates between frames with different configurations. The first frame performs scanning operations while the second frame provides an extended pause period. This periodic alternation allows the display to refresh at adequate intervals (maintaining display quality) while spending significant time in low-power pause states (reducing self-consumed current). The regular cycling between active and pause modes prevents luminance gradient issues while achieving energy savings.
3Use of energy by moving object
If the pause period is extended, then electric power consumption is reduced, but the scanning frequency may decrease
Solution Approach 1:
By segmenting the display operation into two alternating frame types (first frame with scanning+pause, second frame with pause only), the patent enables extended pause periods without reducing the scanning frequency of display refresh. The scanning operations concentrate in the first frame maintaining adequate refresh rates, while the second frame provides extended power-saving pause time. This segmentation allows both high scanning frequency and long pause periods to coexist.
Data Source
AI summary
A display device including a display panel and repeating a scanning period during which the display panel is scanned and a pause period during which the display panel is not scanned. A scanning period and a pause period are set successively to a preceding frame out of two consecutive frames. A pause period is set to an entire period of a subsequent frame out of the two consecutive frames.