Micro LED Pixel Unit with Dual Green Sub-Pixels for White Balance
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Solution Overview
Problem
High-resolution micro LED display panels face issues with reduced light-emitting efficiency and wavelength shift due to current supply differences, leading to inconsistencies in brightness and color imaging performance.
Innovation Solution
A pixel unit design comprising four sub-pixels, including at least one red LED element, two green LED elements, and one blue LED element, with a control element outputting control signals to each LED element through dedicated control channels, ensuring optimal current distribution and maintaining white balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sub-pixel sizes are reduced to achieve higher resolution, then display resolution is improved, but manufacturing precision requirements increase and light-emitting efficiency decreases
Solution Approach 1:
The pixel unit is segmented into multiple independently controllable sub-pixels (red, green1, green2, blue) with dedicated control channels. This segmentation allows each sub-pixel to be controlled individually, enabling precise current distribution to compensate for size reduction effects and maintain manufacturing feasibility while achieving high resolution.
Solution Approach 2:
Different current control strategies are applied to different sub-pixels based on their specific characteristics. The control element outputs customized control signals (CR1, CG1, CB1) to each sub-pixel through dedicated control channels, allowing local optimization of light-emitting efficiency while maintaining overall high resolution display performance.
2Measurement precision
If sub-pixel sizes are reduced to achieve higher resolution, then display resolution is improved, but light-emitting efficiency decreases
Solution Approach 1:
The control element provides customized control signals to each sub-pixel through dedicated control channels, optimizing current distribution to maximize light-emitting efficiency of each sub-pixel despite size reduction. This local optimization ensures that smaller sub-pixels operate at peak efficiency.
Solution Approach 2:
The system dynamically adjusts current parameters (CR1, CG1, CB1) supplied to each sub-pixel based on their individual characteristics and size. By changing current magnitude and timing parameters, the system compensates for reduced light-emitting efficiency in smaller sub-pixels while maintaining high resolution.
3Illumination intensity
If current supply is increased to compensate for smaller sub-pixel size, then brightness is improved, but wavelength shift occurs causing color inconsistency
Solution Approach 1:
Each sub-pixel receives customized control signals with specific current parameters tailored to its color type and size characteristics. Red, green, and blue sub-pixels are controlled independently with optimized current waveforms, allowing brightness compensation without causing wavelength shift or color inconsistency.
Solution Approach 2:
The control element independently manages current supply to each sub-pixel based on their specific electrical and optical characteristics. This feedback-oriented control approach adjusts current parameters to achieve target brightness levels while maintaining stable wavelength and color consistency, preventing the wavelength shift that would occur with simple current increase.
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
The solution enhances light-emitting efficiency and maintains consistent white balance, addressing issues of brightness and color inconsistency in high-resolution micro LED display panels.
Implementation Method 1
The display technology is mainly driven by light-emitting diode (LED) which can meet the requirements of display such as wide color gamut, high density, high brightness, and low power consumption by its unique element characteristics
Implementation Method 2
each sub-pixel can be driven to emit light individually since they use micro LEDs as sub-pixels in the display panels
Data Source
AI summary
In order to maintain the white balance ratio of the mixed white light, a pixel unit is provided, which is composed of four sub-pixels of red, green, blue, and another green colors, and these sub-pixels are composed of a red LED element, a first green LED element, a blue LED element and a second green LED element. A control element is used to control the four sub-pixels of red, first green, blue and second green correspondingly by outputting control signals through the control channels. Base on the adjustment of the current, the brightness ratio of the above three colors is still maintained at the ratio of 3:6:1 of the white balance, and the ratio of the white balance of the white light after being mixed is also maintained.