Transmissive Display Illumination Control for Reflection Reduction
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Solution Overview
Problem
Conventional image display devices with transmissive modes suffer from insufficient transparency and reflection issues due to the placement of illuminators behind the display panel, leading to suboptimal viewing experiences, especially in varying ambient light conditions.
Innovation Solution
An image display device configuration that includes a display panel switchable between image display and transmissive modes, with an illuminator and illuminance detector to adjust illumination brightness based on ambient light levels, ensuring optimal transparency and minimizing reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an illuminator is disposed behind the display panel to illuminate objects in the space portion, then the visibility of objects behind the panel is improved, but reflection from the display panel surface increases and transparency is reduced
Solution Approach 1:
The patent applies dynamics by making the illuminator's emission intensity adjustable rather than fixed. The controller dynamically changes the illuminator's emission intensity based on ambient light conditions detected by the illuminance detector, allowing the system to adapt between high visibility needs and transparency preservation needs.
Solution Approach 2:
The patent changes the parameter of illuminator emission intensity according to ambient illuminance levels. By detecting ambient light conditions and adjusting the illuminator's output accordingly, the system optimizes the balance between illuminating objects behind the panel and maintaining panel transparency.
2Object-affected harmful factors
If the display panel is operated in transmissive mode to view objects behind the panel, then transparency is improved, but the display functionality is reduced
Solution Approach 1:
The system dynamically switches between image display mode and transmissive mode based on user needs and ambient conditions. The controller can transition between these modes, allowing the display panel to function as both a display device and a transparent window depending on the operational state.
Solution Approach 2:
The display panel is designed with multi-functionality, serving both as an active display device and as a transparent window. By combining image display capability with transmissive mode operation, the panel can fulfill multiple functions depending on the operational state and ambient conditions.
3Device complexity
If fixed illumination brightness is used regardless of ambient conditions, then the illumination control is simplified, but the transparency and reflection characteristics become suboptimal in varying light environments
Solution Approach 1:
The patent implements feedback by using the illuminance detector to continuously monitor ambient light conditions and feed this information back to the controller. The controller then adjusts the illuminator's emission intensity based on this feedback, creating a closed-loop control system that automatically optimizes transparency and reflection characteristics.
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 solution effectively utilizes the display panel in transmissive mode by dynamically adjusting illumination brightness, maintaining natural transparency and reducing reflection, thereby enhancing the visibility of objects behind the panel regardless of ambient conditions.
Implementation Method 1
an illuminance detector which detects an ambient illuminance of the image display device
Implementation Method 2
an illuminator which is disposed behind the display panel, and emits illumination light to the space portion
Data Source
AI summary
An image display device includes a display panel, a space portion, an illuminator, a controller, and an illuminance sensor. The display panel is switchable between an image display mode in which an image is displayed and a transmissive mode in which the display panel is in a transmissive state where a back side of the display panel is visible in a front view. The space portion and the illuminator are provided behind the display panel. The illuminator emits illumination light to the space portion. The controller controls the illuminator. The illuminance sensor detects an ambient illuminance of the image display device. The controller performs illumination control for causing the illuminator to emit illumination light with a brightness that is in accordance with a result of detection by the illuminance sensor when the display panel is operating in the transmissive mode.