Optical Cavity Display with Peripheral Sensing
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Solution Overview
Problem
Display apparatuses face reliability and robustness issues under harsh conditions, particularly due to rapid temperature increases from sunlight and light source heat, which can cause liquefaction or yellowing of the liquid crystal layer, and existing temperature monitoring methods are not precise enough to detect the temperature of sensitive components.
Innovation Solution
Incorporating an optical cavity between the display unit and the backlight module, with sensing devices such as cameras, light sensors, or temperature sensors disposed on the periphery to accurately monitor the liquid crystal layer's temperature and ambient light, allowing for precise self-detection and control of the display's operation to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is placed in front of a small portion of the viewing surface to detect image quality, then the self-detection capability is improved, but the viewing surface area is reduced due to sensor shielding
Solution Approach 1:
The sensing device is moved from the front viewing surface to the periphery of the optical cavity, changing the spatial dimension of sensor placement. This allows the sensor to detect light from the display unit without blocking the viewing surface, resolving the contradiction between detection capability and viewing area.
2Quantity of substance
If temperature sensors are mounted on a circuit board with the light source module to monitor internal temperature, then the temperature monitoring coverage is improved, but the temperature measurement precision of sensitive components is reduced
Solution Approach 1:
The sensing device acts as an intermediary between the light source module and the liquid crystal layer. It detects light from the display unit and infers the temperature of the liquid crystal layer indirectly, providing precise temperature measurement without direct contact that would interfere with component operation.
3Adaptability or versatility
If the display apparatus operates under harsh conditions with sunlight irradiation, then the adaptability is improved, but the temperature of the liquid crystal layer increases causing liquefaction or yellowing
Solution Approach 1:
The sensing device provides real-time feedback on the temperature and ambient conditions of the liquid crystal layer. This feedback enables the control system to adjust operating parameters dynamically, allowing the display apparatus to maintain proper functioning under harsh conditions while preventing temperature-related damage.
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 enables more precise self-detection and longer lifespan of the display apparatus by accurately measuring the liquid crystal layer's temperature and ambient conditions, allowing for real-time adjustments to reduce heat and ensure proper functioning, even in harsh environments.
Implementation Method 1
The at least one sensing device is disposed on the periphery of the optical cavity for sensing the temperature of the liquid crystal layer
Implementation Method 2
The optical cavity is formed between the display unit and the backlight module
Data Source
AI summary
A display apparatus is provided. The display apparatus comprises a display unit, a backlight module, an optical cavity and at least one sensing device. The optical cavity is formed between the display unit and the backlight module. The at least one sensing device is disposed on the periphery of the optical cavity for sensing the display unit.