Side Surface Reflectors for Display Light Leakage Control
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Solution Overview
Problem
Existing display apparatuses struggle to allow visual recognition of a background on one surface from the opposite surface while minimizing light leakage from the second surface of the display panel, which is not effectively addressed by traditional backlight devices or reflection plates.
Innovation Solution
A display apparatus comprising a first and second light-transmissive substrate with a liquid crystal layer and at least one light-emitting device, where a reflector is arranged on the side surfaces of the substrates to reflect light and control the scattering state of the liquid crystal layer, allowing visualization of the background while suppressing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a backlight device or reflection plate is arranged on the back of the display panel, then light leakage from the second surface is suppressed, but visual recognition of the background on the opposite surface is blocked
Solution Approach 1:
The invention divides the light control function into two separate components: a first reflection plate on the first surface for controlling light exit, and a second reflection plate on the second surface for controlling light entry. This segmentation allows each reflection plate to independently manage light in its respective direction, enabling background visibility while suppressing light leakage from the second surface.
2Stability of the object's composition
If a backlight device is used to control light, then display uniformity is improved, but device complexity and light leakage are increased
Solution Approach 1:
The invention extracts the light control function from the traditional backlight device and implements it through reflection plates positioned on both surfaces of the display panel. By taking out the light control function from the back surface only approach and distributing it across both surfaces, the invention achieves display uniformity without requiring a complex backlight device structure.
3Object-generated harmful factors
If a reflection plate is arranged on the back of the display panel, then light leakage is suppressed, but the structure becomes more complex
Solution Approach 1:
The invention merges the light control functions of both surfaces by implementing reflection plates on the first surface and second surface that work together as an integrated system. The first reflection plate and second reflection plate are positioned and configured to cooperate, with the first controlling light exiting the first surface and the second controlling light entering the second surface, achieving light leakage suppression through a coordinated dual-surface structure.
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 clear visualization of the background on one surface from the opposite surface while reducing light leakage, achieving high transmittance and improved display uniformity without the need for a backlight device or reflection plate.
Implementation Method 1
at least one reflector arranged on at least one of a side surface of the first light-transmissive substrate or a side surface of the second light-transmissive substrate, the side surface of the first or second light-transmissive substrate being on an opposite side of the side surface of the first or second light-transmissive substrate to which the at least one light-emitting device faces, and configured to reflect light at the side surface on the opposite side
Implementation Method 2
a liquid crystal layer including polymer dispersed liquid crystals sealed between the first light-transmissive substrate and the second light-transmissive substrate
Data Source
AI summary
According to an aspect, a display apparatus includes: a first light-transmissive substrate; a second light-transmissive substrate arranged to face the first light-transmissive substrate; a liquid crystal layer including polymer dispersed liquid crystals sealed between the first light-transmissive substrate and the second light-transmissive substrate; at least one light-emitting device arranged to face at least one of a side surface of the first light-transmissive substrate or a side surface of the second light-transmissive substrate; and at least one reflector arranged on at least one of a side surface of the first light-transmissive substrate or a side surface of the second light-transmissive substrate, the side surface of the first or second light-transmissive substrate being on an opposite side of the side surface of the first or second light-transmissive substrate to which the at least one light-emitting device faces, and configured to reflect light at the side surface on the opposite side.