Asymmetric Prism Film for Borderless Display
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Solution Overview
Problem
Conventional display devices face challenges in minimizing the impact of panel frame borders on image display when combining multiple devices, often resulting in decreased image brightness and increased thickness, making them unsuitable for larger display dimensions like laptops or televisions.
Innovation Solution
A display device configuration that includes a backlight module, an optical film set with a light-splitting layer and a grating layer, and a prism film with asymmetric prisms, which splits and directs light to reduce border effects without compromising brightness or increasing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If two lens films (bottom concave lens film and top convex lens film) are used to expand image display range and reduce border effects, then the border effects are reduced, but the overall thickness of the display device increases and image brightness decreases
Solution Approach 1:
The patent extracts and removes one of the two lens films (either the bottom concave lens film or the top convex lens film) from the conventional display device structure. By eliminating one lens film while retaining the other, the patent reduces the overall thickness of the display device while still achieving the function of expanding the image display range and reducing border effects through the remaining lens film's optical properties
Solution Approach 2:
The patent modifies the optical parameters of the remaining lens film (such as curvature radius, refractive index, or thickness of the lens film) to compensate for the removal of the other lens film. By adjusting these parameters, the patent maintains the image expansion function and border reduction effect while achieving a thinner overall device structure
2Object-affected harmful factors
If two lens films are used to expand image display range, then the border effects are reduced, but image brightness decreases
Solution Approach 1:
The patent removes one lens film from the dual-lens-film structure, thereby reducing the total number of optical interfaces. This reduction in interfaces minimizes light loss through reflection and refraction at each interface, thereby maintaining or improving image brightness while still achieving border effect reduction through the remaining lens film
Solution Approach 2:
The patent optimizes the optical parameters of the remaining lens film (such as increasing its refractive index or adjusting its curvature) to enhance light transmission efficiency. By carefully tuning these parameters, the patent ensures that sufficient light reaches the display panel, maintaining high image brightness while achieving the desired image expansion and border reduction
3Object-affected harmful factors
If two lens films are used to reduce border effects, then the border effects are minimized, but the device complexity and manufacturing complexity increase
Solution Approach 1:
The patent simplifies the display device structure by removing one lens film from the conventional dual-lens-film configuration. This reduction in component count directly decreases device complexity, making the overall structure simpler and easier to manufacture while retaining the essential function of border effect reduction through the remaining lens film
Solution Approach 2:
The patent designs the remaining lens film to perform multiple functions: it serves as both the image expansion element and the border reduction element. By making this single lens film multi-functional, the patent eliminates the need for separate components, thereby reducing device complexity and streamlining the manufacturing process
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 effectively shifts or expands images to minimize border effects while maintaining image brightness and preventing thickness increases, enabling borderless image display in larger devices.
Implementation Method 1
the light-splitting layer splits the backlight into a first backlight group and a second backlight group, and average light-emitting directions of both backlight groups are inclined with respect to the light-emitting surface
Implementation Method 2
the grating layer only allows the first backlight group to pass while blocking the second backlight group from passing
Implementation Method 3
the prism film has a plurality of prisms disposed side-by-side on one side of the prism film facing the display panel... the first surface and the second surface are asymmetric
Data Source
AI summary
A display device includes a backlight module, a display panel, a prism film, a light-splitting layer, and a grating layer. The light-splitting layer splits light into a first backlight group and a second backlight group, wherein the two groups are inclined in different directions relative to a light-emitting surface of the backlight module. The grating layer allows the first backlight group to pass while blocking the second backlight group. The prism film has a plurality of prisms disposed facing the display panel. Each prism has a first surface and a second surface, wherein the angle between the first surface and the normal line to the light-emitting surface is greater than the angle between the second surface and the normal line to the light-emitting surface.