Curved Display Panel Asymmetric Source PCB Design
Solution Overview
Problem
Large flat panel displays experience picture quality issues due to viewing angle, and the bending of source printed circuit boards leads to drive failure and stress on the display panel, causing physical damage and screen malfunctions.
Innovation Solution
A display apparatus design featuring a display panel with a curved shape, where the source printed circuit boards are connected to chip-on-films that are bent in the thickness direction, with specific side lengths to minimize bending stress, and a control printed circuit board positioned between the source printed circuit boards to manage curvature and reduce structural instability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display panel is made large in flat shape, then the viewing angle picture quality deteriorates, but making it curved improves viewing angle quality while causing bending stress on circuit boards
Solution Approach 1:
The source printed circuit board is designed with asymmetric dimensions where the fourth side length is specifically shorter than the third side length. This asymmetric configuration allows the circuit board to better accommodate the curvature of the display panel while reducing bending stress and preventing drive failure.
Solution Approach 2:
The patent changes the dimensional parameters of the source printed circuit board, specifically setting the fourth side length to be shorter than the third side length. This parameter modification enables the circuit board to flex appropriately with the curved display panel without experiencing excessive stress that would lead to drive failure.
2Stability of the object's composition
If the source printed circuit board is made rigid for structural stability, then manufacturing and assembly become easier, but bending stress causes drive failure and physical damage
Solution Approach 1:
The source printed circuit board is designed as a flexible component that can bend to match the curved shape of the display panel. The asymmetric dimensions (fourth side shorter than third side) enable this flexibility while maintaining structural integrity, preventing both drive failure and physical damage from excessive stress.
3Reliability
If the source printed circuit board is made flexible to accommodate curvature, then bending stress is reduced, but structural stability and manufacturing become more difficult
Solution Approach 1:
The asymmetric design of the source printed circuit board (fourth side shorter than third side) provides a simple geometric solution that achieves flexibility for curvature accommodation. This asymmetric configuration is straightforward to manufacture while effectively reducing bending stress on the display panel.
Data Source
AI summary
A display apparatus includes a display panel including a frontside, a backside, a first side extended along a first direction and a second side extended along a second direction intersecting the first direction, a chip-on-film attached to the frontside of the display panel at the first side, and a source printed circuit board connected to the chip-on-film, wherein the first side is curved in a thickness direction of the display panel, the source printed circuit board includes a third side extended along the second direction and a fourth side extended along the first direction, the fourth side having a length that is shorter than a length of the third side.