Rotating Optical Sensing Module for Display Calibration
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Solution Overview
Problem
Current display devices lack an effective method to simultaneously detect ambient light and display light for calibration, requiring additional detection elements and not allowing for simultaneous ambient and display light detection.
Innovation Solution
An optical sensing module integrated into the display device, featuring a frame, light sensing element, and diffusion element, which can rotate to face either ambient light or the display surface, enabling dual sensing modes for light intensity and chromaticity measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional detection elements are used to detect display light for calibration, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The optical sensing module is designed to perform multiple functions: detecting ambient light intensity and detecting display light for brightness and chromaticity calibration. By making the same detection element serve multiple purposes through rotational repositioning, the system achieves comprehensive light detection capabilities without adding separate dedicated sensors for each function, thus improving measurement precision while avoiding increased device complexity
Solution Approach 2:
The optical sensing module is made rotatable around a first rotation axis, allowing it to dynamically change its detection direction. This dynamic repositioning enables the same physical sensor to access different light sources (ambient light or display light) at different times, effectively multiplying its utility and eliminating the need for multiple static sensors
2Measurement precision
If the optical sensing module rotates to face the display surface for receiving image light, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The optical sensing module incorporates a rotational mechanism around a first rotation axis that enables it to switch between facing the ambient light direction and facing the display surface. This dynamic repositioning allows the same sensor to accurately measure both ambient light and display light by orienting itself appropriately, achieving high measurement precision without requiring separate fixed sensors for each measurement type
Solution Approach 2:
The rotational mechanism enables a single optical sensing module to serve multiple measurement functions: ambient light sensing and display light calibration. By making the module rotatable, the system allows one component to perform the work of what would traditionally require multiple dedicated sensors, improving measurement precision while keeping the overall device complexity manageable
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
Enables thinner display devices by providing multiple calibration modes, allowing for simultaneous detection of ambient and display light, reducing the need for additional detection elements and enhancing calibration capabilities.
Implementation Method 1
The diffusion element is connected to the frame and is disposed above the light sensing element
Data Source
AI summary
An optical sensing module, including a frame, a light sensing element, and a diffusion element is provided. The light sensing element is disposed on the frame. The diffusion element is connected to the frame and is disposed above the light sensing element. In a first sensing mode, ambient light passes through the diffusion element before received by the light sensing element to make the optical sensing module to obtain light intensity of the ambient light. In a second sensing mode, the optical sensing module rotates around a first rotation axis to make the light sensing element face a display surface of the display device for receiving image light of the display surface so that the optical sensing module obtains brightness or chromaticity of the display device. A display device having this optical sensing module is also provided.