Thyristor Light Emitting Element with Low-Resistance Current Path
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Solution Overview
Problem
In light emitting elements, thyristors can become electrically separated due to high resistance layers, leading to unevenness and lighting deviation in light emission, which is undesirable.
Innovation Solution
A light emitting element with a low resistance layer is used to prevent electrical separation of the thyristor, ensuring stable current flow and uniform light emission by laminating the thyristor on the light emitting unit with a low resistance layer that does not impede current flow laterally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a high resistance layer is used in the thyristor structure, then the thyristor can be electrically separated for independent control, but this causes unevenness and lighting deviation in light emission
Solution Approach 1:
The patent applies local quality by creating a low resistance layer specifically at the position where current flows from the electrode contacting the thyristor, while other regions may maintain different resistance characteristics. This localized modification ensures sufficient current flow through the thyristor without requiring high resistance for electrical separation, thereby preventing lighting deviation while maintaining control capability.
2Reliability
If additional electrodes are added to prevent electrical separation, then uniform light emission can be maintained, but the device complexity and size increase
Solution Approach 1:
The patent changes the resistance parameter of the semiconductor layer by introducing a low resistance layer with different doping concentration or material composition. This parameter change allows the existing electrode structure to function effectively without adding additional electrodes, thereby maintaining uniform light emission while avoiding increased device complexity.
3Illumination intensity
If the light emitting unit size is increased to improve light output, then more light can be emitted, but the overall device size increases
Solution Approach 1:
The patent changes the electrical resistance parameter of the thyristor structure by introducing a low resistance layer, which improves current flow characteristics and light emission efficiency. This allows achieving higher light output from a compact structure without increasing the device size, as the improved electrical parameters enable more efficient light generation within the same physical footprint.
Data Source
AI summary
A light emitting element includes: a substrate; a light emitting unit that is laminated on the substrate; and a thyristor that is laminated on the light emitting unit and performs setting so as to cause the light emitting unit to emit light or increase an amount of emitted light by being turned into an ON state, the thyristor having a low resistance layer with a resistance which does not electrically separate the thyristor at a position where a current flows from an electrode being in contact with the thyristor.