RGBW Signal Conversion Device for OLED Display Brightness Optimization
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Solution Overview
Problem
Existing methods for converting RGB signals to RGBW signals in OLED display technology reduce image brightness and contrast, increase power consumption, and require costly driving chips, leading to shorter device lifetimes and higher manufacturing costs.
Innovation Solution
A signal conversion device comprising a gamma conversion unit, brightness detection unit, and brightness processing unit that generates RGBW output signals based on RGB proportional coefficients and brightness input values, optimizing image brightness without increasing power consumption and reducing power usage in light emitting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If RGB signals are converted to RGBW signals using prior art methods, then the display device can utilize white sub-pixels for improved luminous efficiency, but the brightness and contrast of the displayed image are reduced
Solution Approach 1:
The patent applies parameter changes by modifying the gamma conversion process and introducing brightness scaling coefficients to dynamically adjust the conversion from RGB to RGBW signals. This allows optimization of both luminous efficiency and image brightness by changing the mathematical parameters of the conversion algorithm rather than using fixed conversion methods.
Solution Approach 2:
The patent introduces dynamic adjustment mechanisms through brightness scaling coefficients that can be modified in real-time based on display conditions. The conversion process is made dynamic rather than static, allowing the system to adapt to different viewing conditions and content types to maintain optimal brightness and contrast while utilizing white sub-pixels.
2Adaptability or versatility
If prior art conversion methods are used, then RGBW display is achieved, but power consumption of light emitting devices increases
Solution Approach 1:
The patent modifies the conversion parameters to optimize power consumption by adjusting the gamma curve and brightness scaling coefficients. This allows the system to achieve RGBW display capability while controlling the power consumption through parameter optimization rather than direct conversion methods that consume excessive power.
3Adaptability or versatility
If prior art conversion methods are used, then RGBW signaling is implemented, but manufacturing cost increases due to requirement of high-cost driving chips
Solution Approach 1:
The patent makes the driving chip's existing RGB output interface universal by implementing software-based conversion to RGBW signals. This allows the same driving chip to support both traditional RGB displays and advanced RGBW displays without hardware modifications, thereby reducing manufacturing costs while maintaining RGBW signal transmission capability.
4Use of energy by moving object
If prior art conversion methods are used, then white sub-pixels are activated, but the lifetime of light emitting devices is reduced
Solution Approach 1:
The patent optimizes the balance between luminous efficiency and device lifetime by adjusting the gamma conversion parameters and brightness scaling coefficients. This controlled parameter adjustment allows white sub-pixels to be utilized effectively for improved luminous efficiency while preventing excessive power consumption that would reduce device lifetime.
Data Source
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AI summary
The present invention discloses a signal conversion device, a signal conversion method and a display device. The signal conversion device includes a gamma conversion unit, a brightness detection unit and a brightness processing unit, wherein the gamma conversion unit is used for performing a gamma conversion process on RGB input signals and generating RGB brightness input values; the brightness detection unit is used for generating a W brightness input value based on RGB proportional coefficients and the RGB brightness input values; and the brightness processing unit is used for generating RGBW output signals based on the RGB proportional coefficients, the RGB brightness input values and the W brightness input value. With the present invention, the brightness of a displayed image can be increased with a premise that the power consumption is not changed, so that the contrast of the displayed image is increased, and the display quality of the image is also improved. With the present invention, the power consumption of light emitting devices is reduced with a premise that the display brightness of a displayed image is not changed, so that the lifetime of the light emitting devices is increased, the cost of driving chips is reduced and thus the manufacturing cost of products is reduced.