Liquid Crystal Display Optical Panel for Bezel-Free Image Enlargement
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Solution Overview
Problem
Liquid crystal display devices face challenges in reducing or eliminating the non-display region at the peripheral edge, and using convex lenses to enlarge images results in image distortion and uneven visibility across different viewing points, especially in multi-display setups.
Innovation Solution
A liquid crystal display device incorporating a planar light source, a transmissive liquid crystal panel, an optical panel with a laminated structure, and a viewing angle enlarging means to refract and disperse light rays, allowing for correct image display and enlarged effective display area without distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a convex lens is arranged on the front surface of the liquid crystal panel to enlarge the image, then the effective display area is enlarged, but the image becomes distorted and visibility varies depending on viewing points
Solution Approach 1:
The optical panel is divided into multiple regions corresponding to individual pixels or pixel groups. Each region has a specific refraction pattern designed to redirect light from its corresponding pixel region. This segmentation allows precise control of light paths while maintaining overall image fidelity and enabling effective area enlargement without distortion.
Solution Approach 2:
Different regions of the optical panel have different refraction characteristics tailored to their specific functions. The refraction amount and direction vary locally across the panel to compensate for viewing angle effects and maintain image accuracy. This local optimization ensures that each pixel's light is redirected appropriately while preserving the overall image quality.
2Area of moving object
If the non-display region is reduced to eliminate the bezel, then the effective display area ratio is improved, but the drivers and signal lines cannot be properly arranged
Solution Approach 1:
The optical panel extends into the region where the bezel would traditionally be located, utilizing the space in front of the liquid crystal panel. This dimensional extension allows the optical functionality to occupy the peripheral space without interfering with the driver arrangement on the liquid crystal panel's non-display region, effectively enlarging the display area ratio while maintaining manufacturability.
3Area of moving object
If a multi-display is used to achieve larger screen display, then the display size is increased, but the images from multiple displays are not aligned properly when viewed from finite distances
Solution Approach 1:
The optical panel modifies the angular distribution of light rays emerging from the liquid crystal panel. By controlling the refraction parameters across different regions, the optical panel ensures that light from corresponding pixel regions of multiple displays is redirected at consistent angles, enabling proper alignment and merging of images when viewed from finite distances in multi-display configurations.
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 enables faithful image representation across various viewing angles and enlarges the effective display area, potentially eliminating the need for a bezel and ensuring correct image display in both single and multi-display configurations.
Implementation Method 1
an optical panel, which is an optical element having a flat-plate shape and arranged so that a rear surface thereof is directed to the liquid crystal panel, for enlarging the original image to form a display image on a front surface of the optical panel, the optical panel causing a unit parallel ray of each of the plurality of pixels to obliquely travel by refraction so that an incident position and an exit position of the unit parallel ray are shifted from each other in a flat-plate plane
Implementation Method 2
viewing angle enlarging means which is arranged so that a rear surface thereof is directed to the optical panel, and allows the unit parallel ray from the optical panel to enter, the viewing angle enlarging means generating a dispersed ray by expanding an angular distribution of the unit parallel ray and exiting the dispersed ray from a front surface of the viewing angle enlarging means, thereby enlarging a viewing angle of the display image
Data Source
AI summary
Provided is a liquid crystal display device which is capable of eliminating a non-display region at a peripheral edge of a display screen, and displaying an image on the entire surface thereof. A backlight unit (22) emits parallel rays. The liquid crystal panel (24) transmits the parallel ray as a unit parallel ray in pixel unit, thereby forming an original image. An image enlarging panel (26) is an optical element having a flat-plate shape. The image enlarging panel (26) causes the unit parallel ray of each pixel to obliquely travel by refraction to shift a position of the unit parallel ray in a flat-plate plane, to thereby forms a display image enlarged the original image. A viewing angle enlarging panel (28) expands an angular distribution of the entering unit parallel ray from the image enlarging panel (26), thereby enlarging a viewing angle of the display image.