Display Device Peripheral Region Light Transmission
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Solution Overview
Problem
Conventional display devices cause discomfort when viewing a background through the peripheral regions outside the display area, as these regions do not transmit light, leading to an incomplete viewing experience.
Innovation Solution
The display device incorporates an array substrate and a counter substrate with a liquid crystal layer, along with a light source that emits light into the side surfaces, featuring a mesh-shaped metal layer in the peripheral regions to ensure non-orthogonal light incidence, reducing light leakage and allowing the background to be visible without discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the peripheral region outside the display region does not transmit light, then the display contrast is improved, but the background cannot be seen causing discomfort to the viewer
Solution Approach 1:
The patent applies different optical properties to different regions of the display device. The display region maintains light blocking for contrast, while the peripheral region is designed to transmit light for background visibility. This local differentiation resolves the contradiction by allowing each region to have the quality needed for its specific function.
2Object-affected harmful factors
If the peripheral region transmits light to allow background visibility, then viewer comfort is improved, but display contrast may be degraded
Solution Approach 1:
The patent segments the display device into distinct functional regions: a display region for image output with controlled light blocking, and a peripheral region for background transmission. This segmentation allows the device to simultaneously achieve high contrast in the display area and background visibility in the peripheral area without mutual interference.
3Shape
If wiring lines are added to the peripheral region to match the display region pattern, then symmetry is improved, but light leakage increases
Solution Approach 1:
The patent extracts the functional requirement of symmetry from the peripheral region's physical structure. Instead of adding wiring lines that would create symmetry, the design achieves visual balance through other means while maintaining the light-transmitting property. This extraction allows the peripheral region to be symmetric in appearance without the harmful effect of light leakage from additional conductive elements.
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 effectively reduces the sense of discomfort by ensuring the background is visible through the peripheral regions, maintaining consistent transmittance and minimizing light leakage, thus enhancing the overall viewing experience.
Implementation Method 1
a liquid crystal layer including polymer-dispersed liquid crystals filled between the first light-transmitting substrate and the second light-transmitting substrate
Implementation Method 2
A direction of incidence of light from a first side surface closest to the light source toward an opposite surface of the first side surface is non-orthogonal to a first side forming a mesh of the metal layer
Data Source
AI summary
A display device includes: an array substrate; a counter substrate; a liquid crystal layer; and a light source that emits light into a side surface of the array substrate or a side surface of the counter substrate. The display device includes: first wiring lines in a first peripheral region outside a display region, the first wiring lines being configured to be supplied with a constant potential; and second wiring lines in a second peripheral region located opposite to the first peripheral region with the display region therebetween, the second wiring lines being coupled to the scanning lines. A shape of a region occupied by the first wiring lines in the first peripheral region is obtained by inverting a shape of a region occupied by the second wiring lines in the second peripheral region, in a mirror-symmetrical manner. The first wiring lines are not coupled to the scanning lines.