Backlight LED Antistatic Layout for ESD-Resistant Displays
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Solution Overview
Problem
Display apparatuses are vulnerable to damage from static electricity due to thinning circuit patterns, particularly affecting light sources like LEDs, necessitating improved antistatic measures.
Innovation Solution
Incorporation of an antistatic member with a specific shape or structure that surrounds light emitting diodes and power feeding lines, ensuring it is spaced apart to enhance antistatic performance in all directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If circuit patterns are thinned to reduce size, then device compactness is improved, but vulnerability to electrostatic discharge increases
Solution Approach 1:
An antistatic member is introduced as an intermediary element between the thinned circuit patterns and external electrostatic sources. This member forms a protective barrier that intercepts and dissipates static electricity before it can reach the vulnerable light sources, thereby maintaining reliability despite reduced circuit thickness.
Solution Approach 2:
The antistatic member is positioned in advance around the light sources and circuit patterns to provide preemptive protection. By establishing this protective structure before electrostatic discharge occurs, the system cushions against potential damage, allowing thin circuit designs to maintain their compactness without sacrificing reliability.
2Reliability
If antistatic member is placed close to light sources, then protection effectiveness is improved, but risk of electrostatic discharge to circuit patterns increases
Solution Approach 1:
The antistatic member is strategically positioned with different spatial relationships to different components: it is placed close to light sources to provide intensive protection where needed, while maintaining appropriate spacing from circuit patterns to minimize discharge risk. This localized quality adjustment optimizes protection effectiveness for each component type.
Solution Approach 2:
The patent utilizes spatial dimensionality by arranging the antistatic member in a closed curve configuration around light sources, creating a three-dimensional protective zone. This dimensional approach allows the member to be close to light sources for protection while naturally maintaining distance from circuit patterns through proper geometric positioning.
3Reliability
If antistatic member forms closed curve around light sources, then antistatic performance in all directions is improved, but device complexity increases
Solution Approach 1:
The antistatic member forming a closed curve serves multiple functions simultaneously: it provides omnidirectional electrostatic protection around light sources, defines spatial boundaries for component placement, and can serve as part of the structural substrate. This multi-functionality justifies the increased structural complexity by delivering comprehensive antistatic performance in all directions.
Data Source
AI summary
A display apparatus may include: a liquid crystal panel; and a backlight unit configured to provide light to the liquid crystal panel. The backlight unit includes: a substrate including an insulating layer and a conductive layer, the insulating layer defining a first part of a first surface of the substrate, and the conductive layer defining a second part of the first surface; and light emitting diodes on the first surface of the substrate; wherein the conductive layer includes: at least one power feeding pad connected to the light emitting diodes; at least one power feeding line connected to the at least one power feeding pad; and an antistatic member spaced apart from the at least one power feeding pad and the at least one power feeding line, and wherein the antistatic member includes a closed curve in which at least two of the plurality of light emitting diodes are disposed.