Display Driving Device Grouping Light Emitting Elements
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Solution Overview
Problem
Display driving devices face challenges in maintaining voltage levels and brightness due to collective driving of light emitting elements, which leads to voltage drops and decreased brightness.
Innovation Solution
The solution involves grouping light emitting elements into non-overlapping groups based on video information, allowing for either collective or divided driving to optimize voltage maintenance and brightness, with the grouper determining the number of groups based on brightness information to adjust driving periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If light emitting elements are collectively driven, then driving simplicity is improved, but voltage drop increases and brightness decreases
Solution Approach 1:
The patent divides the scanning line into multiple light emitting element groups (first group, second group, third group, etc.) and drives them sequentially in different time periods. This segmentation prevents simultaneous driving of all elements, reducing voltage drop while maintaining brightness through controlled sequential activation.
2Ease of operation
If light emitting elements are collectively driven, then driving simplicity is improved, but voltage drop increases
Solution Approach 1:
The patent segments the light emitting elements into multiple groups and drives them sequentially. By controlling the driving timing of each group separately, the system reduces the total current demand on any single scanning line at any given time, thereby minimizing voltage drop across the display.
3Stress or pressure
If light emitting elements are divided into groups with non-overlapping driving periods, then voltage maintenance is improved, but driving complexity increases
Solution Approach 1:
The patent dynamically determines the driving timing of each light emitting element group based on the display scanning sequence. The driver controls the timing of group activation to ensure non-overlapping periods while maintaining voltage levels. This dynamic control adapts the driving pattern to the scanning sequence, managing complexity through systematic timing control.
Data Source
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AI summary
The display driving device (1) includes: a grouper (2) that performs grouping of a plurality of light emitting elements (for example, light emitting elements (21 to 2n)) arranged on a scanning line (for example, a scanning line (SL2)) of the display (9) into one or more light emitting element groups (for example, light emitting element groups (G1 to G5)) based on video information input; and a driver (for example, a cathode driver (CD)) that drives the one or more light emitting element groups so that driving periods do not overlap.