RGBW Display Substrate White Sub-Pixel Color Interference Control
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Solution Overview
Problem
The white sub-pixel in RGBW structural pixels interferes with the color display by increasing the perceived brightness of mixed color lights, causing a shift in color coordinates perceived by the human eye, leading to reduced brightness and altered color appearance.
Innovation Solution
A display substrate with a control unit that controls the white sub-pixel to be in a dark state when specific data signals are transmitted, using an electrochromic cell to change its transmittance and prevent visual interference with the mixed color light emitted by red, green, and blue sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a white sub-pixel is added to form an RGBW structure, then the brightness of the pixel is improved, but the white sub-pixel causes interference to the color displayed by the pixel
Solution Approach 1:
The patent applies a dynamic control mechanism where the white sub-pixel's light emission is dynamically adjusted based on the display content. When color information is being displayed, the white sub-pixel is controlled to reduce or eliminate its light emission, preventing color interference. When brightness enhancement is needed, the white sub-pixel is activated. This dynamic switching resolves the contradiction between maintaining brightness improvement and preventing color interference.
Solution Approach 2:
The patent changes the operational parameters of the white sub-pixel by controlling its light emission intensity based on different display modes. By adjusting the emission parameter from full intensity (for brightness enhancement) to reduced or zero intensity (for accurate color display), the system resolves the contradiction between brightness improvement and color accuracy.
2Illumination intensity
If the white sub-pixel emits white light continuously, then the overall brightness is enhanced, but the perceived brightness of mixed color light is reduced
Solution Approach 1:
The system dynamically adjusts the white sub-pixel's emission based on the required display output. When color accuracy is prioritized, the white sub-pixel emission is reduced or eliminated. When overall brightness enhancement is needed and color accuracy is less critical, the white sub-pixel is activated. This dynamic adjustment resolves the contradiction between overall brightness enhancement and perceived brightness accuracy.
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 solution ensures that the user's viewing effect is improved by preventing the white sub-pixel from affecting the brightness and color perception of mixed color lights, maintaining the actual brightness and color coordinates of the displayed colors.
Implementation Method 1
an electrochromic layer disposed on the electrolyte layer... controlling the white sub-pixel to be in a dark state upon the data signal chip transmitting a predetermined set of data signals to the pixels
Data Source
AI summary
Disclosed are a display substrate and a driving method thereof, and a display device. The display substrate includes a plurality of pixels, a data signal chip and a control unit. Each of the pixels includes a white sub-pixel; the data signal chip is for transmitting a set of data signals to the pixels, the set of data signals including data signals transmitted to the white sub-pixel; and the control unit controls the white sub-pixel to be in a dark state when the data signal chip transmits a predetermined set of data signals to the pixels. When the data signal chip transmits the predetermined set of data signals to the pixels, the display substrate controls the white sub-pixel to be in a dark state.