Glassless 3D Display Sensing Through a Translucent Decorative Layer
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Solution Overview
Problem
Conventional display devices that display stereoscopic images without special glasses are visible when not in use, and there is a need to make the display panel invisible in the non-display state, as well as detect external proximity objects near the display region.
Innovation Solution
A detection system comprising a display panel, backlight, parallax barrier, sensor region, and decorative layer that uses light from the back surface to make the display panel invisible and detect external proximity objects using electrodes and a detection circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a parallax barrier is used to display stereoscopic images without special glasses, then the display device can achieve glassless 3D display functionality, but the display panel itself may be visually recognized when the device is in a non-display state
Solution Approach 1:
The patent applies a decorative layer with translucency that can change its optical properties. When the display is off, the decorative layer appears opaque or translucent to hide the display panel structure. When the display is on, the decorative layer becomes transparent to allow light transmission and image display. This dynamic optical property change resolves the contradiction by making the panel invisible only when needed.
Solution Approach 2:
The decorative layer is designed with dynamic optical characteristics that respond to the display state. The layer transitions between opaque and transparent states based on whether the display is active or inactive, allowing the system to adapt its appearance dynamically. This dynamic behavior enables the panel to be hidden during non-display states while maintaining visibility functionality during active display states.
2Adaptability or versatility
If a parallax barrier is used for stereoscopic display, then glassless 3D functionality is achieved, but the ability to detect external proximity objects near the display region is lost
Solution Approach 1:
The patent merges the decorative layer with sensing functionality by integrating sensors within or behind the decorative layer structure. This combination allows the decorative layer to simultaneously serve as both an aesthetic element and a sensing medium, enabling proximity detection without compromising the glassless 3D display functionality. The merged structure resolves the contradiction by adding detection capability without adding separate components that would interfere with the parallax barrier operation.
Solution Approach 2:
The decorative layer is designed to perform multiple functions: it provides aesthetic appearance, controls light transmission, and enables proximity sensing. By making the decorative layer multi-functional, the system achieves proximity detection capability while maintaining the glassless 3D display functionality. This universal design resolves the contradiction by eliminating the need to choose between display functionality and detection capability.
3Object-generated harmful factors
If a decorative layer with translucency is added to overlap the detection region and parallax barrier, then the display panel can be made invisible in non-display state, but the device structure becomes more complex
Solution Approach 1:
The patent combines multiple functions into the decorative layer: aesthetic appearance, light transmission control, and proximity sensing. By merging these functions into a single integrated layer, the design adds minimal structural complexity while achieving multiple objectives. The decorative layer serves as both a cosmetic element and a functional component, reducing the need for separate structures.
Solution Approach 2:
The decorative layer is designed as a multi-functional element that simultaneously provides visual aesthetics, optical control, and sensing capabilities. This universal design approach allows a single component to fulfill multiple roles, thereby minimizing the increase in device complexity while achieving the desired panel invisibility and proximity detection functions.
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 system effectively makes the display panel invisible in the non-display state and can detect external proximity objects, enhancing user experience by providing a seamless interaction with stereoscopic images.
Implementation Method 1
a decorative layer having translucency and provided at a position overlapping the detection region and the parallax barrier
Implementation Method 2
a sensor region having a detection region and disposed on a back surface of a front plate, a plurality of electrodes provided in the detection region
Implementation Method 3
a parallax barrier having a plurality of openings and disposed at a position overlapping the display panel
Implementation Method 4
a backlight configured to irradiate the display panel with light from the back surface side
Data Source
AI summary
A detection system includes a display panel configured to display an image using light from a back surface side, a backlight configured to irradiate the display panel with light from the back surface side, a parallax barrier having a plurality of openings and disposed at a position overlapping the display panel, a sensor region having a detection region and disposed on a back surface of a front plate, a plurality of electrodes provided in the detection region, and a decorative layer having translucency and provided at a position overlapping the detection region and the parallax barrier.