Substrate-Integrated Light Source Display for Slimmer Profile
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) face challenges in achieving slimness, weight savings, and high color richness while maintaining reliability and wide-angle light distribution, as they require a bulky backlight module, and organic light-emitting diode (OLED) displays are unstable at varying environmental conditions.
Innovation Solution
A display device structure comprising a lower substrate, a light source, a polarized light activation layer, an inner polarizer layer, and a light modulation layer, where the light source generates light that enters the lower substrate, exciting the polarized light activation layer to produce polarized color lights, which are then enhanced in polarization by the inner polarizer layer before reaching the light modulation layer, allowing for improved light distribution and color richness without the need for a bulky backlight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a traditional backlight module with light-guide plate is used in LCD, then the display can provide sufficient light, but the thickness and weight of the display increase significantly
Solution Approach 1:
The patent extracts and removes the light-guide plate from the traditional backlight module structure. By placing the light source directly at the bottom of the lower substrate and using a reflective layer to redirect light upward, the design eliminates the need for a separate light-guide plate, thereby reducing display thickness while maintaining adequate light output.
Solution Approach 2:
The patent changes the spatial arrangement of the light source from a side-mounted configuration (in traditional LCDs) to a bottom-mounted configuration. The light source is positioned at the bottom surface of the lower substrate, emitting light upward through the substrate, which reduces the horizontal space required and allows for a thinner overall display structure.
2Length of moving object
If OLED layer is used to eliminate backlight module, then display thickness is reduced, but display performance dramatically decreases under high or low temperatures and humidity levels
Solution Approach 1:
The patent employs a composite structure combining inorganic lower substrate and upper substrate materials with organic light modulation layer and polarizer layers. The inorganic substrates provide environmental stability and protection against temperature and humidity variations, while the organic layers provide the necessary optical functions, creating a hybrid structure that achieves both thinness and reliability.
3Reliability
If LCD structure is used, then reliability is maintained across different conditions, but color richness and angle of FWHM of light distribution are lower compared to OLED
Solution Approach 1:
The patent applies local quality enhancement by introducing a polarizer layer with specific optical properties at strategic positions within the display structure. The polarizer layer is configured to manipulate light polarization and improve color saturation and distribution characteristics in specific regions, thereby enhancing overall color richness and light distribution angle while maintaining the reliable LCD architecture.
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 results in a thinner, lighter display with enhanced color richness and wider angle light distribution, maintaining stability across various conditions, addressing the limitations of both LCDs and OLEDs.
Implementation Method 1
at least a portion of the light entering the lower substrate passes through the bottom surface and enters the polarized light activation layer to excite the polarized light activation layer to generate a plurality of polarized color lights of different colors
Implementation Method 2
The polarized color lights pass through the lower substrate to be raised in polarization levels by the inner polarizer layer before reaching the light modulation layer
Data Source
AI summary
A display device includes a lower substrate, a light source, a polarized light activation layer, an inner polarizer layer, a light modulation layer, and an upper substrate. The lower substrate has a light entrance side, and a bottom surface and a top surface opposite to each other. The light source generates light entering the lower substrate through the light entrance side. The light entering into the lower substrate at least partially passes through the bottom surface to enter and excite the polarized light activation layer into generating a plurality of polarized color lights of different colors. The polarized color lights have their polarization levels increased by the inner polarizer layer before reaching the light modulation layer.