LCD Module Reflective Bump Structure for Single-Step Fabrication
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Solution Overview
Problem
Current reflective LCD technologies face challenges in fabricating array bump-structure layers with varying sloping conditions within a single photolithography step, leading to increased process time and costs, and difficulty in achieving both concentrative and wide-angle light reflection properties.
Innovation Solution
The LCD module design incorporates a bottom substrate with distinct first and second surfaces, where the reflective member is disposed on the second surface, allowing for the fabrication of bumps with different sloping angles in a single photolithography step, enabling adjustable reflection angles and improved wide viewing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single photolithography step is used to fabricate array bump-structure layer, then fabrication process is simplified, but it is difficult to achieve bumps with different sloping angles for both concentrative and wide-angle properties
Solution Approach 1:
The array bump-structure layer is segmented into multiple regions (first bump region and second bump region), where each region contains bumps with different sloping angles. This segmentation allows a single photolithography step to produce structurally diverse bumps by defining different geometric patterns in different regions, thus achieving both concentrative and wide-angle light reflection properties without increasing fabrication complexity.
Solution Approach 2:
Different regions of the array bump-structure layer are assigned different local geometric qualities (sloping angles). The first bump region has bumps with a first sloping angle optimized for concentrative reflection, while the second bump region has bumps with a second sloping angle optimized for wide-angle reflection. This local quality variation enables the single photolithography step to produce functionally differentiated bumps across the display panel.
2Adaptability or versatility
If multiple photolithography steps are performed to create different bump conditions in different regions, then both concentrative and wide-angle properties can be achieved, but fabrication time and costs substantially increase
Solution Approach 1:
Multiple bump structures with different sloping angles are merged into a single array bump-structure layer that can be fabricated in one photolithography step. The patent combines the first bump region and second bump region into one integrated layer, allowing simultaneous formation of bumps with different geometries through a single processing step, thereby eliminating the need for multiple sequential photolithography steps and reducing fabrication time and costs.
3Illumination intensity
If smooth bumps are used in the bump structure, then concentrating property of reflected light is greater favoring front viewing, but wide-angle light cannot be received and reflected
Solution Approach 1:
Different regions of the display panel are assigned different local bump geometries: the first bump region contains smooth bumps with higher concentrating property for front viewing, while the second bump region contains sloped bumps with wider light reception and reflection capabilities for wide-angle viewing. This local quality differentiation allows the display to provide both concentrative and wide-angle properties simultaneously across different spatial regions.
4Adaptability or versatility
If sloped bumps are used in the bump structure, then wide-angle light can be received and reflected favoring wide-angle viewing, but concentrating property of reflected light is reduced
Solution Approach 1:
The display panel is divided into regions with different local bump qualities: the second bump region contains sloped bumps optimized for wide-angle viewing with enhanced light reception and reflection capabilities, while the first bump region contains smooth bumps optimized for front viewing with higher light concentration. This local quality variation allows each region to specialize in its intended viewing function without compromising the other.
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 approach reduces fabrication steps and increases process yield, allowing for optimized light reflection angles tailored to user environments, enhancing both concentrative and wide-angle viewing experiences while minimizing power consumption.
Implementation Method 1
reflective displays use bump structures having reflective efficacy to reflect ambient light for illuminating the screen
Implementation Method 2
The displaying principle of LCDs is to make use of dielectric anisotropy of liquid-crystal molecules. By applying an external electric field, the arrangement of liquid-crystal molecules changes, enabling various photoelectric effects in liquid-crystal thin films
Implementation Method 3
as the light source, such as LEDs, emits light into the light-guiding plate, light enters the light-guiding plate by refraction
Data Source
AI summary
The present invention provides a liquid crystal display module, which comprises a bottom substrate, one or more reflective member, an array bump-structure layer, a liquid crystal layer, and a top substrate. The array bump-structure layer comprises one or more first bump region and one or mode second bump region. The second bump region is disposed on the reflective member correspondingly. By using the reflective member, the problem of complicated fabrication of the array bump layer having a plurality of sloping angles according to the prior art can be avoided.