Wearable Projector Transmittance Control for Battery and Ambient Light
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Solution Overview
Problem
Wearable electronic devices based on augmented reality struggle with image visibility in high ambient illuminance and power consumption, making it difficult for users to recognize projected images, especially when the ambient light is bright or the image is dark.
Innovation Solution
Incorporating a battery, illuminance sensor, transparent member with a light adjustment mechanism, and a projector, the device adjusts transmittance and output luminance based on ambient brightness and battery capacity to enhance visibility and minimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the output luminance of the projector is increased to improve image visibility in high ambient illuminance, then the visibility of projected content is improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of output luminance based on real-time ambient illuminance measurements and battery capacity status. The processor continuously monitors environmental conditions and automatically modifies the projector's luminance output, transitioning from static to adaptive operation to optimize both visibility and power consumption.
Solution Approach 2:
The system changes the operating parameters of the projector by adjusting output luminance levels according to ambient illuminance conditions and battery capacity. When ambient light increases, the projector luminance is increased accordingly; when battery capacity is low, luminance is reduced to conserve energy, thereby adapting performance parameters to environmental and power constraints.
2Illumination intensity
If the transmittance of the transparent member is decreased to improve image visibility in bright ambient light, then the visibility of projected content is improved, but the power consumption increases
Solution Approach 1:
The transmittance of the transparent member is dynamically adjusted based on ambient illuminance levels. The processor monitors ambient light conditions and automatically modifies the transmittance property of the transparent member, enabling adaptive optical performance that responds to environmental changes while managing power consumption.
Solution Approach 2:
The optical parameter of the transparent member (transmittance) is changed in response to ambient illuminance conditions. In bright environments, transmittance is decreased to enhance image visibility; in dim environments, transmittance is increased to maintain visibility while reducing power consumption requirements.
3Illumination intensity
If the output luminance is continuously adjusted to match ambient illuminance, then the visibility is optimized, but the battery capacity is depleted faster
Solution Approach 1:
The system implements a feedback control mechanism where the processor continuously monitors both ambient illuminance and battery capacity status. Based on this dual-parameter feedback, the processor makes intelligent decisions about output luminance adjustment, balancing visibility requirements against available power resources to extend device operation duration.
Solution Approach 2:
Instead of continuously maximizing output luminance to match ambient illuminance, the system applies partial action by adjusting luminance to sufficient levels for acceptable visibility while conserving battery capacity. This approach accepts slightly reduced visibility in exchange for significantly extended battery life, particularly when ambient conditions permit.
4Illumination intensity
If the transmittance and luminance are adjusted frequently to adapt to changing ambient conditions, then the visibility is maintained, but the power consumption increases
Solution Approach 1:
The system employs periodic action by adjusting transmittance and luminance at discrete intervals based on significant changes in ambient illuminance or battery capacity, rather than continuously. The processor monitors conditions and triggers adjustments only when necessary, reducing the frequency of actuator operations and associated power consumption while maintaining adequate visibility.
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
Improves visibility of projected content and reduces power consumption by dynamically adjusting transmittance and luminance according to ambient conditions and battery state, ensuring optimal image recognition and extended device usage.
Implementation Method 1
an illuminance sensor configured to measure a brightness of an outside of the wearable electronic device
Implementation Method 2
a light adjustment member disposed in at least a part of the transparent member and adjusting a transmittance with respect to the incident light
Data Source
AI summary
An electronic device is disclosed. The wearable electronic device, according to various embodiments, comprises: a battery; an illuminance sensor capable of measuring the brightness of the outside of the wearable electronic device; a transparent member capable of transmitting light incident from the outside; a light adjusting member arranged on at least one portion of the transparent member and capable of adjusting the transmittance of the incident light; a projector capable of outputting an image through the transparent member; and a processor, wherein the processor may be configured so as to measure the remaining capacity of the battery and the brightness of the outside, and when the remaining capacity is within a first predetermined range, adjust the transmittance to a first predetermined transmittance and adjust the output luminance of the projector to a first predetermined luminance on the basis of the brightness, and when the remaining capacity is within a second predetermined range, adjust the transmittance to a second predetermined transmittance and adjust the output luminance of the projector to a second predetermined luminance which is lower than the first predetermined luminance on the basis of the brightness. In addition, various embodiments may be provided.