Dual-Surface Display Pixel Layout to Minimize Light Crosstalk
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Solution Overview
Problem
Existing display devices primarily emit light from one surface, limiting their ability to display images on both surfaces and suffer from light interference and crosstalk between top and bottom emission light emitting diodes.
Innovation Solution
A display device with alternately disposed top and bottom emission light emitting diodes, separated by black matrices, to emit light on both surfaces of the substrate, minimizing interference and crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light emitting diodes are disposed to emit light to both surfaces of the substrate, then image display capability on both surfaces is improved, but light interference and crosstalk between top and bottom emission light emitting diodes occurs
Solution Approach 1:
The display device is segmented into first sub pixels for top emission and second sub pixels for bottom emission, with light emitting diodes alternately disposed in different regions of the substrate. This spatial segmentation separates the light emission paths and reduces interference between top and bottom emission diodes.
Solution Approach 2:
Different regions of the substrate are assigned different emission characteristics - first sub pixels are optimized for top emission while second sub pixels are optimized for bottom emission. This local differentiation allows each region to perform its specific function with minimal interference from the other emission direction.
2Object-affected harmful factors
If light emitting diodes are alternately disposed in different regions, then light interference is reduced, but device structure complexity increases
Solution Approach 1:
The patent combines top emission and bottom emission light emitting diodes into a single integrated substrate structure, where both types of diodes coexist in alternating patterns. This merging approach reduces the need for separate devices while maintaining the benefits of reduced light interference through alternating disposal.
3Object-affected harmful factors
If black matrices are formed to enclose light emitting diodes, then crosstalk is minimized, but manufacturing complexity increases
Solution Approach 1:
Black matrices are introduced as intermediary structures that enclose individual light emitting diodes and separate adjacent diodes. These black matrix structures act as optical barriers that prevent light from one diode from interfering with adjacent diodes, thereby minimizing crosstalk while providing a systematic approach to light isolation.
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
Enables dual-surface image display with reduced light interference and crosstalk, enhancing display quality and allowing for seamless tiling of large screens.
Implementation Method 1
a plurality of first light emitting diodes which is disposed in the plurality of first sub pixels and emits light to one surface of the substrate, and a plurality of second light emitting diodes which is disposed in the plurality of second sub pixels and emits light to an opposite surface to one surface of the substrate
Data Source
AI summary
A display device can include a substrate having a plurality of first sub pixels and a plurality of second sub pixels, a plurality of first light emitting diodes disposed in the plurality of first sub pixels and configured to emit light to one surface of the substrate, and a plurality of second light emitting diodes disposed in the plurality of second sub pixels and configured to emit light to an opposite surface to one surface of the substrate. The plurality of first light emitting diodes and the plurality of second light emitting diodes are alternately disposed on the plane. Accordingly, light is emitted to opposite surfaces of the substrate to display images on the opposite surfaces of the substrate.