Block-Segmented Display Emission for Lower IR-Drop
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Solution Overview
Problem
Existing display devices face challenges in improving display quality by minimizing voltage drops (IR-drop) during the emission of light from sub-pixels, particularly in liquid crystal and organic light emitting display devices.
Innovation Solution
The display device is partitioned into multiple blocks, with sub-pixels in different blocks emitting light at different times, and includes circuit units to control the supply of driving current based on data signals, minimizing overlap in emission times and reducing voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all sub-pixels emit light simultaneously, then display quality is maintained, but voltage drops (IR-drop) increase due to overlapping current consumption
Solution Approach 1:
The display unit is divided into multiple blocks (first block, second block, etc.), and sub-pixels within each block are further divided into different emission periods. This segmentation allows current consumption to be distributed across time and space, reducing simultaneous current draw and minimizing voltage drops while maintaining overall display quality through coordinated emission control.
2Loss of energy
If sub-pixels are divided into different emission periods, then voltage drops are reduced, but display uniformity may be affected
Solution Approach 1:
The emission control unit implements periodic emission patterns where sub-pixels in different blocks operate in alternating emission periods (first emission period, second emission period, etc.). This periodic action ensures that while voltage drops are reduced through time-division multiplexing, display uniformity is maintained by systematically cycling through all blocks within a frame period, preventing visible artifacts.
3Stability of the object's composition
If emission times are staggered across blocks, then current flow stability improves, but control complexity increases
Solution Approach 1:
The emission control unit is configured to preliminarily determine and control the emission timing of each block based on predetermined patterns. By establishing emission schedules in advance (first block in first emission period, second block in second emission period, etc.), the system achieves current flow stability without requiring complex real-time control logic during operation.
Data Source
AI summary
A display device includes: sub-pixels including a first circuit unit configured to control a supply period of a driving current correspondingly to a first data signal, and a second circuit unit configured to supply the driving current to a light emitting element correspondingly to a second data signal; and a display unit partitioned into j (j is a natural number of 2 or more) blocks including two or more of the sub-pixels, wherein the sub-pixels included in different blocks are configured to emit light at different times.