Liquid Crystal Device Rear Light Sensor Placement
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Solution Overview
Problem
Liquid crystal devices face challenges in receiving sufficient ambient light due to polarizing plates, leading to reduced light intensity and a need for larger light receiving areas, which compromises the exterior design and display area.
Innovation Solution
A liquid crystal device design where the light receiving element is positioned to avoid overlap with polarizing and sealing materials, allowing ambient light to reach the light receiving surface without significant reduction, and a control element adjusts illumination light intensity based on received ambient light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light receiving element is installed inside the liquid crystal panel near the display area, then the ambient light detection sensitivity is improved, but the light receiving area needs to be increased which narrows the display area and deteriorates exterior design
Solution Approach 1:
The light receiving element is positioned on the rear surface of the liquid crystal panel, utilizing the third dimension (depth/thickness) rather than occupying planar space within the display area. This spatial repositioning allows the light receiving element to capture ambient light from the rear without encroaching on the front display area, thus maintaining both detection sensitivity and display area size.
Solution Approach 2:
The invention introduces an optical guide structure that acts as an intermediary to transport ambient light from the front display area to the light receiving element positioned on the rear surface. This optical guide enables the light receiving element to detect ambient light effectively without being directly exposed at the front, resolving the conflict between detection sensitivity and display area.
2Measurement precision
If the light receiving area is increased to improve ambient light detection, then the detection sensitivity is improved, but the exterior design deteriorates due to reduced display area
Solution Approach 1:
By moving the light receiving element to the rear surface and using optical guides to transport light, the system achieves sufficient light collection without increasing the planar footprint. This maintains the sleek exterior design and full display area while still providing adequate ambient light detection sensitivity through the optical path extension in the depth dimension.
3Reliability
If polarizing plates are disposed in the front and rear sides of the display area, then the liquid crystal display function is improved, but the ambient light intensity reaching the light receiving surface is significantly decreased
Solution Approach 1:
The optical guide structure serves as an intermediary that captures ambient light before it passes through the front polarizing plate and directs it to the light receiving element. This allows the polarizing plates to remain in place for proper LCD function while the optical guide provides an alternative light path that preserves ambient light intensity for detection purposes.
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
Ensures sufficient ambient light reception without increasing the light receiving area, maintaining the exterior design and display area integrity while optimizing power consumption based on ambient light conditions.
Implementation Method 1
a light receiving element that receives ambient light
Implementation Method 2
first and second substrates supporting a liquid crystal layer in a sandwich manner
Data Source
AI summary
Provided is a liquid crystal device including: a liquid crystal panel which includes first and second substrates supporting a liquid crystal layer in a sandwich manner and a sealing material disposed between the first and second substrate to seal the liquid crystal layer, and on which illumination light is irradiated from the rear side thereof; an optical plate disposed in the front side of the liquid crystal panel; and a control element that controls a display status of an image displayed on the liquid crystal panel, wherein: the liquid crystal panel includes a light receiving element that receives ambient light; and the light receiving element is disposed in a position where at least a portion of a light receiving surface thereof does not overlap the optical plate when seen from a plan view.