Dual-Sided Transparent LED Electrode Layout for Rear Light Leakage
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Solution Overview
Problem
In transparent LED displays using micro-LEDs, light emitted from the LEDs leaks to the rear of the transparent substrate through gaps between electrodes, reducing the display's transparency.
Innovation Solution
The LEDs are arranged on both surfaces of the transparent substrate with electrodes on one surface shielding the light paths from the LEDs on the opposite surface, preventing light leakage by using electrodes on one surface to block light paths from the LEDs on the other surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LEDs are arranged on both surfaces of the transparent substrate to increase aperture ratio, then light transmission is improved, but light leakage to the rear surface increases
Solution Approach 1:
The patent converts the harmful light leakage into a beneficial effect by using the leaked light to illuminate the rear surface shielding region. The electrodes on the rear surface are positioned to receive and block the leaked light, converting what would be waste light into a functional element that prevents further leakage and enhances the overall display performance.
Solution Approach 2:
The patent introduces a third dimension by arranging electrodes on both the front and rear surfaces of the transparent substrate. This dual-surface electrode arrangement creates shielding regions that extend into the depth of the substrate, effectively blocking light leakage paths that would otherwise escape through the rear surface.
2Area of stationary object
If aperture ratio is increased to improve transparency, then light transmission is improved, but light leakage through electrode gaps increases
Solution Approach 1:
The patent converts the harmful light leakage through electrode gaps into a beneficial illumination source for the rear surface shielding region. By positioning electrodes on the rear surface to intercept this leaked light, the system transforms the gap leakage problem into a functional feature that enhances display performance without reducing aperture ratio.
Solution Approach 2:
The patent applies local quality by creating specific shielding regions on the rear surface where electrodes are densely arranged to block light leakage. This localized electrode density variation allows the aperture ratio to remain high in the display area while providing targeted light blocking in the shielding regions where leakage occurs.
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 effectively prevents light from leaking to the opposite surface of the transparent substrate, enhancing the display's transparency by reducing light loss and increasing the aperture ratio.
Implementation Method 1
each of the electrodes on the second surface is arranged in a second surface shielding region including a region that shields a light path extending from one of the LEDs arranged on the first surface through the transparent substrate
Implementation Method 2
each of the electrodes on the first surface is arranged in a first surface shielding region including a region that shields a light path extending from the LEDs on the second surface through the transparent substrate
Data Source
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AI summary
A transparent LED display includes a transparent substrate, pairs of electrodes arranged in an array on the transparent substrate, LEDs each arranged between a corresponding one of the pairs of electrodes, and apertures provided on the transparent substrate, the apertures being areas free of the electrodes and allowing light to pass through, wherein the LEDs are arranged on both of a first surface and a second surface of the transparent substrate, and each of the electrodes on the second surface is arranged in a second surface shielding region including a region that shields a light path extending from one of the LEDs arranged on the first surface through the transparent substrate, and each of the electrodes on the first surface is arranged in a first surface shielding region including a region that shields a light path extending from the LEDs on the second surface through the transparent substrate.