LED Pixel Signal Line Sharing for Lower-Wiring Display Panels
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Solution Overview
Problem
LED display devices with three-color pixels require a large number of signal lines, leading to complex wiring and increased costs due to the need for multiple signal lines per pixel column.
Innovation Solution
A display device configuration where pixels with three-color LEDs share signal lines, reducing the number of signal lines per column to two by alternating the connection of red, green, and blue LEDs, allowing for efficient signal transmission and simplified wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If three signal lines are provided per pixel column for three-color LED elements, then each LED element can be controlled independently, but the number of signal lines on the substrate becomes large and wiring becomes complicated
Solution Approach 1:
The patent merges the control of multiple LED elements by connecting LED elements of the same color across adjacent pixel columns to shared signal lines. Specifically, red LED elements in even columns share one signal line while blue LED elements in even columns share another, and similarly for odd columns. This combining approach reduces the signal lines from three per column to two total, while maintaining independent color control capability through selective activation of these shared lines.
Solution Approach 2:
The patent makes signal lines universal by designing them to serve multiple functions and multiple LED elements simultaneously. The first signal line universally controls all red LED elements across all pixel columns (both even and odd), and the second signal line universally controls all blue LED elements across all pixel columns. This multi-functionality allows the same physical signal line to address different LED elements at different times, reducing the total number of required signal lines while preserving full color control.
2Adaptability or versatility
If multiple signal lines are provided per pixel column, then full color control is achieved, but the number of driving ICs increases and costs increase
Solution Approach 1:
The patent combines the driving functions for multiple LED elements into fewer driving ICs. By organizing LED elements into groups controlled by shared signal lines (red elements on first line, blue elements on second line), the system reduces the number of required driving ICs from three per column to fewer total ICs that can control the entire display through time-multiplexed or selective activation of the shared signal lines.
3Loss of information
If three signal lines are used per pixel column, then complete video signal transmission is possible, but power consumption increases
Solution Approach 1:
The patent merges the power delivery paths by using shared signal lines that carry current to multiple LED elements. Instead of having separate power lines for each LED element, the same signal lines that control red elements also deliver power to all red elements across the display, and similarly for blue elements. This reduces the total number of high-current signal lines required, thereby reducing overall power consumption while maintaining complete video signal transmission capability through selective activation of the shared lines.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the number of signal lines and driving ICs, lowering costs, improving luminance, and reducing power consumption while maintaining effective video signal transmission.
Implementation Method 1
one pixel usually includes LED elements of three colors of red (R), green (G), and blue (B)
Data Source
AI summary
Provided is a display device which enables a reduction in the number of signal lines. A display device includes: a substrate; multiple pixels that are provided on the substrate and form multiple columns; and multiple signal lines that are provided on the substrate and extend in a column direction. The multiple pixels include at least one of multiple first pixels having light emitting diode elements of three colors or multiple second pixels having light emitting diode elements of two colors. The number of the signal lines is two per column.