Active Stereographic Display Lens Array Touch Integration
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Solution Overview
Problem
Conventional autostereographic image displays suffer from reduced image quality due to reduced horizontal resolution and increased thickness when trying to implement both stereographic and touch functions simultaneously, and they often require a fixed user position for optimal image viewing.
Innovation Solution
An active-type stereographic image display apparatus integrates a touch sensing unit with a lens array that adjusts focal length and curvature to provide multiple focusing regions, allowing for improved image quality and user flexibility by separating left and right eye images using a lens array and controlling the distance between the image display unit and the lens array.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lenticular lens is added to achieve autostereographic image display, then stereographic image capability is improved, but the thickness of the display apparatus increases and image quality degrades
Solution Approach 1:
The patent merges the lenticular lens layer with the touch screen structure by making the lens array transparent and integrating it into the touch screen's transparent electrode layers and protective films. This combination allows the stereographic display function to be achieved without adding separate thickness, as the lens structure becomes part of the existing touch screen assembly rather than a separate component.
Solution Approach 2:
The transparent lenticular lens array serves multiple functions simultaneously: it acts as the optical element for autostereographic display, maintains touch screen functionality, and serves as part of the protective structure. This multi-functionality eliminates the need for separate components, thereby reducing overall thickness while maintaining stereographic capability.
2Adaptability or versatility
If a lenticular lens is added to achieve autostereographic image display, then stereographic image capability is improved, but image quality degrades due to reduced horizontal resolution
Solution Approach 1:
The patent applies local quality by making the lenticular lens transparent in the regions where it does not interfere with the display pixels, while maintaining its optical focusing function in specific areas. This selective transparency allows light to pass through unaffected in certain zones while still providing the necessary optical separation for stereographic display in other zones, thereby preserving horizontal resolution where critical.
3Adaptability or versatility
If a touchscreen is attached to the autostereographic image display, then touch functionality is improved, but image quality further degrades due to increased thickness
Solution Approach 1:
The patent combines the touch screen structure with the lenticular lens array by integrating the transparent electrode layers and protective films with the lens structure. This merging eliminates the need for separate attachment of the touch screen to the autostereographic display, as they become a unified structure, thereby preventing additional thickness accumulation.
4Manufacturing precision
If a conventional lenticular lens is used, then a single focal region is achieved, but user flexibility is reduced as fixed positioning is required
Solution Approach 1:
The patent implements dynamics by making the focal length of the lenticular lens adjustable rather than fixed. The lens driving control unit can change the focal length according to the user's viewing distance, allowing the system to adapt to different user positions and maintain high-quality stereographic images dynamically, rather than requiring the user to be at a fixed position.
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
This solution enhances image quality by reducing layer thickness, allowing for adjustable focal length and curvature, enabling high-quality stereographic images across various user positions without the need for a fixed viewpoint, while integrating touch functionality into a single structure.
Implementation Method 1
separating an image output from the image display unit through a lens array into a first eye image and a second eye image based on a refractive index of light
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
An active-type stereographic image display apparatus includes an image display unit; a touch sensing unit to sense a touch position through a first transparent electrode layer and a second transparent electrode layer that are arranged to cross with each other, and to separate an image output from the image display unit through a lens array into a first eye image and a second eye image based on a refractive index of light; and a lens driving control unit to control a focal length by controlling the lens array. The method for driving the active-type stereographic image includes displaying a stereographic image comprising a first eye image and a separate second eye image, sensing a touch position of a user input, separating an image output into a first eye image and a second eye image, and controlling a focal length provided by a lens array.