Image Pickup Window Geometry for Display Area Preservation
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Solution Overview
Problem
Conventional image display devices with integrated image pickup cameras reduce the display area due to the wider non-display area required for the image pickup window, which compromises the size of the display region.
Innovation Solution
The image pickup camera is positioned on the back surface of the image forming layer within the image display region, with an image pickup window part that has a diameter φp satisfying the condition 2Dp tan(θ/2) ≤ φp, where Dp is the distance to the camera focal point and θ is the angle of view, allowing the window to overlap the lens and minimize the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image pickup camera is disposed in the image pickup window part, then image pickup functionality is achieved, but the non-display area becomes wider and the display area becomes smaller
Solution Approach 1:
The patent merges the image pickup window part with the display area by positioning the camera within the display region rather than in a separate non-display area. This integration allows the window part to overlap the lens in plan view while maintaining both display and image pickup functions in the same spatial region, thereby preventing reduction of the display area.
2Area of stationary object
If the image pickup window part is positioned to overlap the lens, then the display area is maximized, but image pickup quality may be compromised
Solution Approach 1:
The patent applies local quality by creating a specific geometric relationship between the window part and lens at the overlap region. The window part's edge diameter φp is precisely controlled to satisfy 2Dp tan(θ/2) ≤ φp, ensuring that the optical path remains unobstructed while maintaining display quality. This localized geometric precision ensures both display area maximization and image pickup quality.
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 configuration prevents the image pickup window from reducing the display area, enabling a larger display region while maintaining effective image pickup functionality.
Implementation Method 1
an image pickup camera which includes an image pickup lens and is disposed on the back surface side of the image forming layer... so as to face toward a display surface of the image forming layer
Data Source
AI summary
Provided is an image display device which includes an image pickup camera and makes it possible to prevent an image pickup window part from reducing a display area. The image display device which includes the image pickup camera is configured such that: the image pickup window part for the image pickup camera is disposed in an image display region; and a diameter φp of the image pickup window part is set so as to satisfy a specific condition which is based on an angle of view θ of the image pickup camera.