Photodeformable Ambient Light Sensor for Display Brightness Control
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Solution Overview
Problem
Existing display devices require manual adjustment of brightness, which is cumbersome, and existing light sensing technologies like photodiodes have complex structures and high production costs, leading to increased power consumption.
Innovation Solution
A display device with an integrated ambient light sensor using a photodeformable element comprising a photodeformable material layer that deforms in response to ambient light changes, adjusting display brightness by connecting or disconnecting with a metal wire to transmit electrical signals, thereby simplifying the structure and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual adjustment of display brightness is used, then device complexity is reduced, but ease of operation deteriorates
Solution Approach 1:
The display device automatically adjusts its brightness based on ambient light conditions detected by the photodeformable element, eliminating the need for manual user intervention. The system serves itself by autonomously sensing environmental light and modifying display output accordingly, resolving the contradiction between simplicity and operational convenience.
2Measurement precision
If photodiode light sensing technology is used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces conventional photodiode-based optical sensing with a photodeformable material that converts light energy directly into mechanical deformation. This mechanical output can be directly sensed by simple contactless methods, eliminating the need for complex photodiode circuits and signal processing while maintaining detection accuracy.
Solution Approach 2:
The invention changes the sensing mechanism from electrical (photodiode current) to mechanical (material deformation). By utilizing the physical deformation of the photodeformable material in response to light, the system achieves light detection with a fundamentally different parameter basis, simplifying the overall sensor structure.
3Measurement precision
If photodiode light sensing technology is used, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The photodeformable material converts light energy into mechanical deformation without requiring active electrical components or power-consuming signal processing circuits. The mechanical deformation itself serves as the detection signal, dramatically reducing power consumption compared to electronic photodiode-based systems that require bias currents and amplification circuits.
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 allows for automatic adjustment of display brightness based on ambient light conditions, reducing power consumption and manufacturing complexity while enhancing user comfort and environmental sustainability.
Implementation Method 1
the photodeformable element comprises a photodeformable material layer; the photodeformable element is configured to deform in response to a change in ambient light to obtain output of the ambient light sensor
Data Source
AI summary
Disclosed are a display device and a method for adjusting its display brightness. The display device includes a display screen and an ambient light sensor in the display screen, wherein the ambient light sensor includes a photodeformable element, and the photodeformable element includes a photodeformable material layer; and the photodeformable element is configured to deform in response to a change in ambient light to obtain output of the ambient light sensor. The ambient light sensor has a simple structure and is easy to be made and to be combined with the display screen.