Display Backlight Antistatic Pad Layout for Dense LED Arrays
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Solution Overview
Problem
The increasing number of light sources in display apparatuses, such as LEDs or OLEDs, leads to a narrowing area for electrostatic discharge protection circuits, making them vulnerable to static electricity damage.
Innovation Solution
A display apparatus design that includes light emitting diodes without Zener diodes, incorporating an antistatic member with divided antistatic pads and an insulating dome to protect the light sources from static electricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of light sources is increased to improve contrast ratio, then the display quality is improved, but the area available for electrostatic discharge protection circuits becomes narrower
Solution Approach 1:
The patent extracts the Zener diode from the light source structure and replaces it with an external antistatic pad connected via conductive adhesive. This removes the space-consuming protection component from the light source area while maintaining electrostatic discharge protection functionality through the external pad structure.
Solution Approach 2:
The patent transitions from planar protection circuit layout to a three-dimensional structure by using conductive adhesive to connect the antistatic pad to the light source. This vertical connection approach frees up horizontal space while maintaining electrical connectivity for protection.
2Reliability
If Zener diodes are used to protect light sources from static electricity, then the light sources are protected, but the device complexity and area consumption increase
Solution Approach 1:
The patent extracts the protection function from the integrated Zener diode and implements it through a separate antistatic pad with conductive adhesive connection. This separation simplifies the light source structure while maintaining protection capability through the external pad configuration.
Solution Approach 2:
The patent uses a simple conductive adhesive layer as the connection medium between the antistatic pad and light source, replacing complex protection circuitry with a simpler, more economical solution that achieves the same protective function.
3Reliability
If Zener diodes are included with each light source, then electrostatic discharge protection is provided, but the manufacturing area and cost increase
Solution Approach 1:
The patent merges the protection function into the substrate structure by forming the antistatic pad directly on the substrate and connecting it to the light source through conductive adhesive. This integration eliminates the need for separate protection components and reduces manufacturing complexity.
Solution Approach 2:
The substrate serves multiple functions: it supports the light sources and simultaneously provides the antistatic pad structure for electrostatic discharge protection. This multi-functionality reduces the overall component count and manufacturing area required.
Data Source
AI summary
Provided is a display apparatus including: a liquid crystal panel; a substrate; a light source module disposed on the substrate. The light source module includes a light emitting diode disposed on the substrate, a feed pad provided on the substrate, an antistatic pad provided on the substrate; and an insulating dome provided on the substrate and covering the light emitting diode. The antistatic pad is divided into two parts by an outline of the insulating dome.