Segmented Light-Emitting Units for Reflective Liquid Crystal Displays
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Solution Overview
Problem
In display devices, arranging a transmission-type light-emitting device above a reflective liquid crystal element poses challenges in distinguishing between light emitted towards the reflective liquid crystal display device and light emitted towards the opposite side, affecting visibility, and existing configurations may impair image visibility due to light shielding layers.
Innovation Solution
A display device configuration featuring a light-emitting device with multiple light-emitting units and a light-transmitting unit between them, positioned between the reflective liquid crystal element and an optical member, where light from the units is reflected by the reflective element and transmitted through the light-transmitting unit to form an image with the optical member, optimizing light distribution and reducing the visibility of light shielding elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a transmission-type light-emitting device is arranged right above a reflective liquid crystal element, then the footprint and total height are reduced, but it becomes impossible to distinguish between light emitted toward the reflective liquid crystal display device side and light emitted toward the opposite side
Solution Approach 1:
The light-emitting device is divided into multiple light-emitting units arranged in a specific pattern, with light-shielding layers positioned between them. This segmentation allows light to be emitted in controlled directions - some toward the reflective liquid crystal element and some toward the opposite side - enabling the observer to distinguish between the two light paths while maintaining the compact stacked configuration.
2Loss of information
If the light-emitting device emits light only toward the reflective liquid crystal display device side, then light direction confusion is avoided, but the visibility of the displayed image may be affected by the light shielding layer
Solution Approach 1:
The light-shielding layers are strategically positioned only in specific regions between the light-emitting units, rather than covering the entire light-emitting device. This localized shielding approach allows sufficient light to pass through to the observer while still providing the necessary light direction distinction, thereby maintaining image visibility without compromising the ability to distinguish light paths.
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 enhances image visibility by ensuring light is effectively reflected and transmitted, reducing the impact of light shielding layers and allowing clear image formation, while maintaining a compact design.
Implementation Method 1
the light emitted from the plurality of light-emitting units is reflected by the reflective liquid crystal element
Data Source
AI summary
A display device (1) includes a light-emitting device (10), a reflective liquid crystal element (20), and an optical member (30). The light-emitting device (10) includes a plurality of light-emitting units (142) and a light-transmitting unit (144) located between the light-emitting units (142) adjacent to each other. The light-emitting device (10) is located between the reflective liquid crystal element (20) and the optical member (30). The plurality of light-emitting units (142) emit light toward the reflective liquid crystal element (20). The light emitted from the plurality of light-emitting units (142) is reflected by the reflective liquid crystal element (20), transmitted through the light-emitting unit (142) of the light-emitting device (10), and formed into an image by the optical member (30).