Recessed Display PCB Shielding for Driving Chip ESD Protection
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Solution Overview
Problem
Display devices are vulnerable to external static electricity, which can compromise the reliability and functionality of the driving chips within the display panel.
Innovation Solution
The display device incorporates a recessed part in the main circuit board with a shielding layer or pattern to protect the driving chip from external static electricity, eliminating the need for a separate cover and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate cover is used to protect the driving chip from static electricity, then the driving chip is protected from external static electricity, but the device complexity and manufacturing process are increased
Solution Approach 1:
The patent merges the shielding function with the main circuit board by forming a shielding pattern directly on the board. The shielding pattern is integrated into the circuit board structure itself, combining the support function of the circuit board with the protective function of the shield, thereby eliminating the need for a separate cover structure
Solution Approach 2:
The main circuit board is given multiple functions: it serves as both the structural support for mounting the driving chip and as the shielding protection against static electricity. The shielding pattern on the circuit board performs the protective function that would otherwise require a separate component
2Reliability
If a separate cover is used to protect the driving chip from static electricity, then the driving chip is protected from external static electricity, but the manufacturing process and time are increased
Solution Approach 1:
The shielding function is combined with the circuit board manufacturing process. The shielding pattern is formed on the circuit board during the same manufacturing steps, eliminating the need for separate assembly of a protective cover and reducing overall manufacturing time
Solution Approach 2:
The shielding pattern is formed on the circuit board in advance during the manufacturing process, before the driving chip is mounted. This preliminary creation of the shielding structure eliminates the need for subsequent assembly steps to install separate protective covers
3Ease of manufacture
If the driving chip is mounted on the connection circuit board without a recessed part, then the manufacturing process is simpler, but the driving chip is more exposed to external static electricity
Solution Approach 1:
The circuit board has different structures in different regions: a recessed part specifically where the driving chip is mounted, and a flat surface elsewhere. The recessed part provides localized protection for the chip while maintaining the overall simplicity of the board structure
Solution Approach 2:
The driving chip is nested within the recessed part of the circuit board, which is itself nested within the shielding pattern. This nested arrangement provides protection through multiple layers without requiring a separate outer cover
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
The shielding layer effectively protects the driving chip from static electricity, enhancing the reliability and integrity of the display device while reducing manufacturing complexity.
Implementation Method 1
The main circuit board includes a shielding layer overlapping the recessed part
Data Source
AI summary
A display device includes a display panel. A main circuit board has a recessed part that is recessed in a thickness direction of the display panel. A connection circuit board is electrically connected to the display panel on a first side of the connection circuit board and electrically connected to the main circuit board on a second side of the connection circuit board opposite to the first side. A driving chip is mounted on the second side of the connection circuit board and is disposed in the recessed part. The main circuit board includes a shielding layer overlapping the recessed part.