Transparent Solar Cell Display Module Power Efficiency
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Solution Overview
Problem
Conventional solar-powered liquid crystal displays have limited power efficiency due to a small effective power-generating area and unsuitable color temperature for visual comfort, especially when applied in building-integrated photovoltaic systems and displays requiring natural lighting.
Innovation Solution
A display module incorporating a transparent type solar cell with high visible light transmittance (10%-40%) and a color temperature greater than 2400K, allowing the solar cell to cover both the display area and its surroundings, increasing the power-generating area and efficiency, and featuring a driving circuit, electric power storage device, and power supply transfer switch for efficient energy management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional solar cell is deployed around a display area, then the display function is maintained, but the power-generating area is limited and power efficiency is low
Solution Approach 1:
The patent merges the solar cell with the display device by positioning the solar cell directly above the display area. This integration allows the solar cell to cover both the display area and surrounding areas, significantly increasing the power-generating area while maintaining the display function. The merged structure enables simultaneous light absorption for power generation and light transmission for display purposes.
Solution Approach 2:
The patent transitions from a two-dimensional deployment of solar cells around the display perimeter to a three-dimensional configuration where the solar cell is positioned above the display area. This vertical arrangement allows the solar cell to utilize both the display area and surrounding areas for power generation, effectively increasing the power-generating area without expanding the horizontal footprint.
2Power
If a transparent type solar cell with strong absorbability for short wavelengths is used, then power generation is improved, but the transmissive spectrum presents a color range from orange-red to dark red causing discomfort to human eyes
Solution Approach 1:
The patent changes the key parameter of color temperature from below 2400K (causing orange-red to dark red color range) to above 2400K. This parameter change adjusts the transmissive spectrum to present a more natural color range that is comfortable for human eyes while maintaining effective power generation capability. The modified solar cell achieves both power generation and visual comfort requirements.
3Object-affected harmful factors
If the visible light transmittance of the solar cell is increased to improve visual comfort, then color rendering is improved, but power generation efficiency may be reduced
Solution Approach 1:
The patent applies different optical properties to different regions of the solar cell system. The solar cell positioned above the display area has optimized properties for both power generation and light transmission, while maintaining a visible light transmittance of 10%-40%. This local optimization allows the system to achieve visual comfort in the display area while maintaining effective power generation in the solar cell region.
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 significantly enhances power-generating efficiency while maintaining visual comfort, enabling applications in building-integrated photovoltaics, e-books, and outdoor billboards by effectively utilizing solar energy and ensuring comfortable color rendering.
Implementation Method 1
The transparent type solar cell is located on a surface of the first substrate relative to an incident direction of the light source for absorbing the light source and converting the light source into electric power
Data Source
AI summary
A display module is provided, which includes a first and a second substrates, a transparent type solar cell, a display device, an electric power storage device, a driving circuit and a power supply transfer switch. In the display module, the first substrate, the transparent type solar cell, the display device and the second substrate are successively arranged according to an incident direction of a light source. The transparent type solar cell has a visible light transmittance of 10%-40% and a color temperature (Tc) larger than 2400K. The electric power storage device is connected to the transparent type solar cell for storing electric power there from, and the driving circuit is connected to the display device for driving the same. The power supply transfer switch is used for transferring the electric power into the electric power storage device or the driving circuit.