Display Device Shared Emission Signal Line for Luminous Efficiency
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Solution Overview
Problem
In LED display devices, optimizing the luminous efficiencies of red, green, and blue sub-pixels is challenging due to varying trends in luminous efficiencies and current density/duty cycle of their driving currents.
Innovation Solution
The display device employs a configuration where the blue and green sub-pixels share a common emission signal line for improved light emission duty, while the red sub-pixel has a separate emission signal line, allowing for distinct light emission periods and duties to enhance power consumption and reduce signal wiring complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each sub-pixel has a separate emission signal line, then each sub-pixel can be controlled independently for optimal luminous efficiency, but the number of signal lines increases and wiring complexity increases
Solution Approach 1:
The patent merges the emission signal lines for blue and green sub-pixels into a single shared signal line, while maintaining a separate signal line for red sub-pixels. This combining approach reduces the total number of emission signal lines from three to two, simplifying the wiring structure while still allowing independent control of each sub-pixel type through multiplexed timing signals.
Solution Approach 2:
The shared emission signal line serves multiple functions by carrying emission control signals for both blue and green sub-pixels through time-division multiplexing. The single signal line performs the work of two separate signal lines by sequentially controlling different sub-pixel types, thereby reducing overall system complexity without sacrificing control capability.
2Device complexity
If blue and green sub-pixels share a common emission signal line, then the number of signal lines is reduced and wiring is simplified, but the control independence for optimizing each sub-pixel's luminous efficiency is reduced
Solution Approach 1:
The patent introduces dynamic time-division multiplexing control for the shared emission signal line. The control signals are dynamically switched between different sub-pixel types (blue and green) based on temporal patterns. This dynamic control mechanism allows the single shared signal line to provide independent control sequences for each sub-pixel type at different time intervals, maintaining control independence while reducing physical wiring complexity.
Data Source
AI summary
A display device is provided. The display device includes a first pixel, a first emission signal line and a second emission signal line. The first pixel includes a blue sub-pixel, a green sub-pixel and a red sub-pixel. The blue sub-pixel includes a first emission control switch. The green sub-pixel includes a second emission control switch. The red sub-pixel includes a third emission control switch. The first emission signal line is electrically connected to the first emission control switch and the second emission control switch. The second emission signal line is electrically connected to the third emission control switch.