Optical Member Structure for Wide-Angle Light Detection in Displays
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Solution Overview
Problem
Existing display devices struggle to accurately detect the amount of incident light on a transmission reflection member using a sensor, particularly in varying light conditions, which affects the functionality and convenience of the device.
Innovation Solution
The display device incorporates an optical member with reflective surfaces that continue to each other, forming a polygonal surface bulging outwards, which guides light to a sensor for detection, expanding the angle range in which light can be detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is used to detect incident light on the transmission reflection member, then light detection capability is provided, but the detection is inaccurate in varying light conditions
Solution Approach 1:
The patent introduces an optical member as an intermediary between the incident light and the sensor. This optical member includes a light receiving surface that captures light from multiple directions and a light guiding surface that directs the captured light to the sensor. By using this intermediary optical structure, the system achieves accurate light detection across varying light conditions without requiring the sensor to directly face all possible incident light angles.
Solution Approach 2:
The optical member transforms the one-dimensional direct detection path into a multi-dimensional light collection system. The light receiving surface is configured to receive light from various angles and directions, effectively adding spatial dimensions to the detection capability. This allows the sensor to detect light that would otherwise miss it directly, improving both accuracy and adaptability to varying light conditions.
2Device complexity
If the sensor directly detects incident light, then the structure is simple, but the angle range for detection is limited
Solution Approach 1:
The optical member adds spatial dimensions to the detection system by incorporating a light receiving surface that spans multiple angles and a light guiding surface that redirects light from various directions to the sensor. This dimensional expansion allows the system to maintain relatively simple construction while achieving wide-angle detection capability.
Solution Approach 2:
The optical member serves multiple functions: it acts as a light collector, a light director, and an angle-expander simultaneously. By integrating these functions into a single component with a light receiving surface and a light guiding surface, the system achieves wide-angle detection without proportionally increasing overall structural complexity.
3Ease of manufacture
If the optical member uses flat reflective surfaces, then manufacturing is easier, but light guidance efficiency is reduced
Solution Approach 1:
The light guiding surface is designed with curved or inclined facets instead of flat surfaces. These curved surfaces more effectively redirect light from various angles toward the sensor, improving light guidance efficiency. While curved surfaces are slightly more complex to manufacture than flat surfaces, they provide superior optical performance in guiding light from the light receiving surface to the sensor.
Solution Approach 2:
The patent optimizes the inclination angles and curvature parameters of the light guiding surface to maximize light guidance efficiency. By carefully selecting and adjusting these geometric parameters, the system achieves high light guidance efficiency while maintaining manufacturability through standardized angular configurations.
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 configuration enhances the ability to detect light across a wide angle range, improving the device's functionality and user convenience by effectively managing light intensity from various directions.
Implementation Method 1
The optical member includes reflective surfaces continuing to each other. The optical member is configured to receive light, reflect the light by the reflective surfaces, and guide the reflected light to the sensor.
Data Source
AI summary
A display device includes a display panel, a transmission reflection member, a sensor, and an optical member. The transmission reflection member is provided in front of the display panel. The sensor detects an amount of light corresponding to incident light incident onto the transmission reflection member. The optical member is provided near the transmission reflection member. The optical member includes reflective surfaces continuing to each other. The optical member receives light and reflects the light by the reflective surfaces. The optical member guides the reflected light to the sensor. The reflective surfaces constitute a polygonal surface bulging out toward an opposite side of an incident side with respect to a virtual plane defined by outer contours of the reflective surfaces.