Hybrid Display Layout With Light Modulation to Eliminate Bezels
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Solution Overview
Problem
Emissive displays face high costs due to the need for light emission devices for every pixel, which limits brightness and performance, especially for larger displays, and are challenged by bezel effects.
Innovation Solution
The use of light emitting devices with light modulations, such as liquid crystal, e-ink, or MEMS-based shutters, integrated with a backplane hosting driving components and optimized spacing, along with reflective layers and color conversion materials, to eliminate bezel effects and match pixel sizes, enabling larger displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light emission devices are used for every pixel in emissive displays, then display coverage and brightness are improved, but manufacturing cost increases significantly
Solution Approach 1:
The display is segmented into two functional parts: light emission devices (LEDs) positioned at corners or edges, and light modulation devices (LCD pixels) covering the main display area. This segmentation allows only a few light emission devices to serve multiple pixels through light guidance, reducing the number of expensive light-emitting components while maintaining display coverage.
Solution Approach 2:
A light guidance structure (including reflective surfaces and optical waveguides) acts as an intermediary between the light emission devices and the light modulation devices. This intermediary captures light from LEDs and redirects it to illuminate multiple LCD pixels, enabling one light source to serve multiple display elements and significantly reducing overall system cost.
2Ease of manufacture
If the number of light emission devices is reduced to lower cost, then manufacturing cost decreases, but display coverage and brightness are compromised
Solution Approach 1:
The patent transitions from a planar arrangement where each pixel requires its own light source to a three-dimensional optical system using light guidance structures. By utilizing reflective surfaces and optical waveguides that extend light paths in multiple dimensions, a single light emission device can illuminate multiple pixels across a large display area, effectively expanding coverage without proportionally increasing the number of light sources.
Solution Approach 2:
The light guidance structure serves multiple functions: it reflects light from LEDs, directs light to multiple pixels, and enables corner-mounted or edge-mounted light sources to illuminate entire display panels. This multi-functional optical intermediary allows fewer light emission devices to achieve coverage equivalent to or greater than traditional per-pixel illumination.
3Device complexity
If light emission devices are placed at corners or edges, then device complexity is reduced, but light distribution uniformity across the display becomes challenging
Solution Approach 1:
The light guidance structure incorporates locally optimized reflective surfaces with specific angles and properties tailored to different regions. Corner-mounted LEDs use reflective surfaces angled to distribute light across the display, while edge-mounted configurations use different reflection geometries. This local optimization of optical properties ensures uniform light distribution despite the simplified corner or edge placement of light sources.
Solution Approach 2:
The optical system incorporates adjustable or adaptive light guidance elements that can optimize light distribution based on viewing conditions. Dynamic adjustment of reflective surface angles or optical waveguide properties allows the system to maintain uniform illumination across the display area while keeping the overall device structure simple and cost-effective.
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 costs and enhances display performance by allowing for larger displays while maintaining brightness and performance, with light modulations effectively directing and enhancing light emission, and adapting to ambient light conditions.
Implementation Method 1
light modulations, such as liquid crystal, e-ink, or MEMS-based shutters
Implementation Method 2
reflective layers and color conversion materials, to eliminate bezel effects
Data Source
AI summary
This invention is to use the light emitting devices with light modulations to eliminate the effect of bezels and match the pixels. It also enables the development of large displays. The invention discloses an array of light emitting devices along with light modulation devices housed with stage, backplane and pads. A filler with reflective material is also used within the housing.