Light-emitting part with serial connection body and substrate grooves
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Solution Overview
Problem
Conventional light-emitting devices require multiple steps for production, leading to increased cycle time and reduced brightness per unit area due to the need for serial connection and spacing, which obstructs downsizing and productivity.
Innovation Solution
A light-emitting part with a single base substrate and multiple light-emitting devices connected in series, where a third device without a current path is included to eliminate the need for excessive spacing, allowing for higher brightness per unit area and simplified production by using a serial connection body with a connection member to connect electrodes of adjacent devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light-emitting devices are connected in series with spacing between them, then electrical connection is achieved, but brightness per unit area is reduced and device size increases
Solution Approach 1:
The patent merges the spacing function into the base substrate itself by forming groove patterns directly on the substrate. This eliminates the need for separate spacing structures between devices, allowing devices to be positioned closer together while maintaining electrical isolation. The groove patterns serve dual purposes: providing mechanical spacing and enabling electrical connection paths, thereby increasing brightness per unit area without compromising connection reliability.
2Reliability
If multiple steps are used for isolating and rearranging light-emitting devices, then proper spacing and connection are achieved, but cycle time increases and productivity decreases
Solution Approach 1:
The patent performs preliminary actions by pre-forming groove patterns on the base substrate before mounting the light-emitting devices. This advance preparation of the substrate structure eliminates the need for subsequent isolating and rearranging steps. Devices can be directly mounted in their final positions with proper spacing already provided by the grooves, significantly reducing cycle time and improving productivity while maintaining reliable isolation and connection.
3Reliability
If cutting allowance is provided when dividing growth substrate, then device separation is achieved, but light-emission amount per unit area is reduced
Solution Approach 1:
The patent extracts the separation function from the physical cutting of the growth substrate and relocates it to groove patterns formed on the substrate surface. This allows devices to remain mounted on the complete substrate without requiring cutting allowances, as the groove patterns provide sufficient electrical and mechanical separation. The result is maximized light-emission amount per unit area while maintaining proper device separation through the groove structures.
Data Source
AI summary
The present invention provides a light-emitting part and a light-emitting apparatus exhibiting high brightness per unit area, and simplified production methods therefor. The light-emitting unit comprises a single base substrate, and a plurality of light-emitting devices thereon. The light-emitting unit includes a serial connection body which connects at least a part of the light-emitting devices in series. The serial connection body comprises light-emitting devices which make a current path, a light-emitting device which does not make a current path, and a connection member which electrically connects an n-electrode and a p-electrode of the light-emitting devices.