HMD Display Luminance Control via Temperature Feedback
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Solution Overview
Problem
Existing display devices with light sources or light emitting parts often face temperature issues due to heat generation, leading to operational limitations, and existing heating countermeasures restrict the mechanical structure of the device.
Innovation Solution
A display device with temperature detection and control mechanisms that adjust the luminance of picture elements based on temperature, ensuring the operation temperature remains within an appropriate range without significantly affecting visibility, and includes features like gamma correction for maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminance of picture elements is increased to improve display visibility, then the brightness and visibility of the display image is improved, but the temperature of the picture elements rises excessively causing operational limitations
Solution Approach 1:
The patent implements a feedback control mechanism where a temperature detection section continuously monitors the temperature of each picture element, and a control section adjusts the luminance based on the detected temperature. When temperature exceeds a predetermined threshold, the control section lowers the luminance of the corresponding picture element, creating a closed-loop feedback system that maintains temperature within operational limits while preserving visibility as much as possible.
2Temperature
If mechanical structures are added to conduct and radiate heat efficiently, then the heat dissipation capability is improved, but the shape and configuration of the display device are restricted
Solution Approach 1:
The patent replaces mechanical heat dissipation structures with a control-based thermal management system. Instead of using heat sinks, thermal conductors, or other mechanical structures to passively conduct and radiate heat, the invention actively controls the luminance of picture elements based on temperature detection. This substitution eliminates the need for complex mechanical thermal management structures, thereby avoiding restrictions on device shape and configuration while still achieving effective temperature control.
3Temperature
If the luminance is reduced to lower the temperature, then the operation temperature can be maintained within appropriate range, but the visibility of the display image is significantly degraded
Solution Approach 1:
The patent applies local quality control by independently managing the luminance of each picture element based on its specific temperature condition. Rather than uniformly reducing the luminance of the entire display, the control section selectively adjusts the luminance of individual picture elements or specific regions that exceed the temperature threshold. This localized approach maintains temperature control while preserving the visibility and overall display quality of areas operating within normal temperature ranges.
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
Effectively manages temperature within the display device to prevent overheating while maintaining image quality and user comfort, allowing for continuous operation without structural restrictions.
Implementation Method 1
a temperature detection section adapted to detect temperature of each of the first picture element and the second picture element
Implementation Method 2
a first picture element and a second picture element each generating picture light
Data Source
AI summary
An HMD worn by a user to use includes a right display unit and a left display unit, an image display section for making a right eye of the user visually recognize an image based on light emitted by the right display unit and making a left eye of the user visually recognize an image based on light emitted by the left display unit, temperature sensors for detecting respective temperatures of the right display unit and the left display unit, and a control section for controlling the luminance of at least either one of the light display unit and the left display unit based on the temperatures detected by the temperature sensors.