Transmission Display Shade Control for Ambient Light Adaptation
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Solution Overview
Problem
Existing head-mounted display devices lack effective control over transmittance of shade, particularly in relation to ambient light and power consumption, which affects the user's experience and efficiency.
Innovation Solution
A transmission type display device with a control unit that adjusts transmittance by setting a light intensity determination value fixed or variable based on ambient light levels and power remaining capacity, using sensors to optimize shade control and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the transmittance of the shade is controlled by fixing the light intensity determination value, then the control of transmittance is simplified, but the adaptability to different ambient light conditions deteriorates
Solution Approach 1:
The patent implements a dual-mode control system where the control unit can dynamically switch between first mode (fixing light intensity determination value) and second mode (variably setting light intensity determination value). This dynamic switching capability allows the system to adapt to different ambient light conditions while maintaining controllable complexity through mode selection.
2Adaptability or versatility
If the light intensity determination value is variably set to adapt to ambient light, then the adaptability improves, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts the light intensity determination value based on detected ambient light levels. The control unit switches between fixed and variable modes, using variable setting only when ambient light conditions require adaptation, thereby reducing overall power consumption compared to continuously variable control.
Solution Approach 2:
The patent changes the parameter of light intensity determination value from fixed to variable based on detected ambient light conditions. This parameter change is triggered only when necessary, allowing the system to maintain low power consumption in stable conditions while adapting when ambient light changes.
3Manufacturing precision
If the transmittance control continuously adjusts based on ambient light, then the image quality is improved, but the power consumption increases
Solution Approach 1:
The control unit performs periodic detection of ambient light levels and adjusts the light intensity determination value accordingly. Rather than continuous adjustment, the system uses periodic sampling and mode switching, maintaining image quality through regular updates while reducing power consumption by keeping the system in a fixed state between updates.
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 device achieves satisfactory control over transmittance, allowing for reduced power consumption and improved user experience by dynamically adjusting shade transmittance according to ambient light conditions and power availability.
Implementation Method 1
a sensor that detects one or both of the level of the ambient light, and the level of the transmitted light passing through the shade
Implementation Method 2
a display unit that transmits ambient light to an image extraction area, so as to output image light from the image formation unit to the image extraction area
Data Source
AI summary
A transmission type display device includes an image formation unit that forms an image of image light, a display unit that transmits ambient light to an image extraction area, and a control unit that determines a first mode in which alight intensity determination value that is a value for determining a light intensity of an image formed by the image formation unit is fixed, and a second mode in which the light intensity determination value is variably set, wherein in the first mode, the control unit fixes the light intensity determination value, and controls the transmittance of the shade, and wherein in the second mode, the control unit variably sets the light intensity determination value, and controls the transmittance of the shade.