EL Lighting Device Terminal Electrode Segmentation
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Solution Overview
Problem
Existing electroluminescent lighting devices face challenges in easy connection to external power supplies, which hinders convenience and efficiency.
Innovation Solution
A lighting device design featuring a housing with terminal electrodes that are electrically connected to the light-emitting element, allowing for direct contact with an external power supply, and optionally including a sensor element for temperature-based power control, with an inorganic insulating film for protection and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the lighting device uses an electroluminescent material with thin film structure, then the emission efficiency is improved, but the connection to external power supply becomes more difficult
Solution Approach 1:
The housing is divided into a light source unit and a holder unit that can be easily assembled together. The terminal electrode is segmented into a first terminal electrode on the housing and a second terminal electrode on the light-emitting element, allowing for simple electrical connection through direct contact between these segmented parts.
Solution Approach 2:
The terminal electrode structure serves as an intermediary component that bridges the electrical connection between the external power supply and the light-emitting element. The first terminal electrode on the housing and the second terminal electrode on the light-emitting element act as intermediate connection points that facilitate easy power supply connection.
2Ease of operation
If the terminal electrode is exposed on the housing peripheral end, then the power supply connection is simplified, but the protection of internal components is reduced
Solution Approach 1:
The housing structure provides localized protection: the housing body covers and protects the light-emitting element and internal components, while the peripheral end portion is intentionally left open to expose the terminal electrode for easy power supply connection. This local quality differentiation allows simultaneous achievement of protection and ease of connection.
Solution Approach 2:
The housing is functionally segmented into a protective body portion that encloses internal components and a peripheral end portion that exposes the terminal electrode. This segmentation allows the housing to simultaneously provide protection for internal components while enabling easy external connection at the exposed terminal electrode location.
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
Facilitates easy and efficient connection to external power supplies, enhances convenience, and extends the device's durability and lifetime through improved protection and power management.
Implementation Method 1
an inorganic insulating film covering a top surface of the light-emitting element is preferably provided
Implementation Method 2
A region of the housing, which covers a light emitting surface of the light-emitting element, and at least one of the first electrode and the second electrode have a light-transmitting property
Implementation Method 3
The first terminal electrode and the second terminal electrode are in contact with respective terminal electrodes for an external power supply, so that the external power supply and the light-emitting element are electrically connected to each other
Implementation Method 4
a light-emitting element including an EL layer interposed between a first electrode and a second electrode
Data Source
AI summary
A lighting device including an electroluminescent (EL) material is connected to an external power supply easily and the convenience is improved. In a lighting device having a light-emitting element including an electroluminescence (EL) layer, a housing including a light-emitting element has a terminal electrode electrically connected to the light-emitting element on a peripheral end portion. The terminal electrode provided on the housing so as to be exposed to the outside is in contact with a terminal electrode for the external power supply, so that the external power supply and the light-emitting element are electrically connected to each other and power can be supplied to the lighting device.