Transparent Solar Battery for Real-Time Display Recharging
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Solution Overview
Problem
Display devices, such as smartphones, have limited endurance due to high power consumption, especially during internet browsing and gaming, and cannot be charged anytime, which restricts their service time.
Innovation Solution
A display device with a rechargeable battery and a transparent solar battery that can recharge in real-time without disrupting the display, using a photosensitive coating to sense light from the backlight and control the charging process through a signal processing unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a transparent solar battery is added to enable real-time recharging, then the service time of the display device is extended, but the device structure becomes more complex
Solution Approach 1:
The transparent solar battery is integrated into the display panel structure itself, merging the charging function with the existing display components. The solar battery is positioned between the upper substrate and the color filters, utilizing the display panel's internal space rather than adding external components, thereby extending service time while minimizing structural complexity increase
Solution Approach 2:
The display panel is designed to serve multiple functions: displaying visual information and simultaneously generating electrical energy through the transparent solar battery. This multi-functionality allows the same device structure to both display content and recharge the battery, addressing the service time extension need without proportionally increasing overall device complexity
2Measurement precision
If the photosensitive coating area is increased to improve light sensing accuracy, then the working state detection becomes more accurate, but the display area is reduced
Solution Approach 1:
The photosensitive coating is selectively applied only to specific regions where light sensing is required, such as the border areas or specific zones of the display panel, rather than uniformly across the entire surface. This localized application ensures accurate working state detection while preserving maximum display area for visual content
Solution Approach 2:
The display panel is segmented into different functional zones: display areas for visual output and photosensitive coating areas for light sensing. This segmentation allows the photosensitive coating to be concentrated in specific regions (such as around the edges or in non-display areas) to achieve sufficient sensing accuracy without compromising the overall display area
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 extends the service time of the display device by allowing real-time recharging during standby periods without affecting the display or increasing computational load.
Implementation Method 1
a transparent solar battery disposed at the upper substrate and configured to recharge the rechargeable battery of the display device
Implementation Method 2
a photosensitive coating disposed in a non-transparent region of the display panel and configured to sense the light emitted by the backlight source
Data Source
AI summary
A display device comprises a display panel and a backlight source, the display panel having an upper substrate and a lower substrate disposed opposite to the upper substrate. The display device further includes a transparent solar battery arranged at the upper substrate, a photosensitive coating arranged in a non-transparent region of the display panel and configured to sense the light from the backlight source, and a signal processing unit connected to the photosensitive coating and the transparent solar battery. The signal processing unit determines the working state of the display device according to changes in resistance of the photosensitive coating, and makes the transparent solar battery recharge or not recharge a rechargeable battery of the display panel.