Display Device Driving Method for Moving Still Image Boundary
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Solution Overview
Problem
Display devices struggle to prevent the visual recognition of boundaries between moving and still image units, leading to noticeable differences in luminance and image quality due to continuous data voltage application across all rows.
Innovation Solution
A display device and driving method that apply data voltages to specific rows in a sequential and decreasing manner, while omitting compensation scan signals to certain rows, to gradually adjust the luminance around the boundary between moving and still image units, thereby minimizing the visual distinction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data voltages are continuously applied to all rows including the boundary area, then image update is maintained, but luminance difference at boundary becomes noticeable
Solution Approach 1:
The patent applies different data voltage application strategies to different regions. Specifically, data voltages are applied to rows in the moving image unit while omitting compensation scan signals for rows in the still image unit, creating locally optimized display characteristics that reduce boundary visibility
Solution Approach 2:
The patent dynamically adjusts the number of rows receiving data voltages based on the frame number. The range of rows receiving data voltages expands and contracts over time, creating a dynamic transition zone that prevents fixed boundary artifacts and improves visual continuity
2Stability of the object's composition
If compensation scan signals are applied to all rows, then display uniformity is maintained, but boundary visibility increases
Solution Approach 1:
The patent extracts and omits compensation scan signals from specific rows (rows corresponding to the still image unit), while maintaining them for other rows (moving image unit). This selective extraction creates a gradual transition that hides the boundary between different display regions
3Productivity
If data voltages are applied to all rows in every frame, then image refresh is complete, but processing time increases
Solution Approach 1:
Instead of applying data voltages to all rows in every frame, the patent applies data voltages only to a partial set of rows (specifically rows in the moving image unit), while relying on held values for still image unit rows. This partial action reduces processing time while maintaining acceptable display quality
Data Source
AI summary
A display device includes a plurality of pixels arranged in m rows and n columns, where the pixels receive write scan signals, data voltages and compensation scan signals, a plurality of write scan lines which provides the write scan signals to the pixels, a plurality of data lines which provides the data voltages to the pixels, and a plurality of compensation scan lines which provides the compensation scan signals to the pixels, wherein in h-th to p-th frames, the data voltages are applied to pixels arranged in first to i-th rows, and in h-th to (h+k)-th frames, the data voltages are applied to pixels of a row unit by increasing sequentially the number of the row unit to which the data voltages are applied in at least one row unit from an i-th row to an (i+1)-th row.