Display Panel Bonding Pin Detection Using Pixel Drive Circuits
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display panel technologies face challenges in quickly and accurately detecting the bonding state between the display panel and the flexible circuit board, which affects the reliability and performance of the display panel.
Innovation Solution
A display panel and detection method utilizing a pixel drive circuit to detect the bonding pins by using a detection circuit connected to data output pins, with a preset timing to drive control lines and obtain detection signals, enabling rapid identification of bonding issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional bonding detection methods are used, then the bonding state can be detected, but the detection process is time-consuming and cannot quickly identify bonding failures
Solution Approach 1:
The patent applies preliminary action by pre-configuring the pixel drive circuit with detection functionality before the actual bonding process. The detection circuit is prepared in advance with test signals and routing, enabling immediate post-bonding verification without requiring separate detection equipment or time-consuming setup procedures.
Solution Approach 2:
The pixel drive circuit performs self-service by using its own internal resources (power supply circuit, control lines, data lines) to conduct bonding detection. The circuit generates test signals, routes them through the bonding interface, and detects signal integrity without requiring external detection equipment, thereby achieving fast self-diagnosis of bonding quality.
2Reliability
If comprehensive bonding detection is performed, then bonding quality can be ensured, but the detection system becomes complex and difficult to implement
Solution Approach 1:
The pixel drive circuit is designed with multi-functionality, serving both its primary display function and bonding detection function. The same control lines, data lines, and power supply circuit are used for both driving the display and conducting bonding tests, eliminating the need for separate dedicated detection hardware and reducing overall system complexity.
Solution Approach 2:
The patent uses existing signal lines (control lines and data lines) as intermediaries to transmit test signals through the bonding interface. These lines already exist in the display panel structure and serve as natural pathways for detection signals, avoiding the need for additional dedicated test connections or complex detection hardware.
3Ease of repair
If bonding failures are not quickly detected, then production efficiency is maintained, but repair difficulty and costs increase
Solution Approach 1:
The detection is performed as a preliminary step immediately after bonding, before the display panel proceeds to subsequent production steps. This early detection allows bonding issues to be identified and addressed while the panel is still in the production line, preventing defective products from advancing and reducing rework costs.
Solution Approach 2:
The detection circuit provides immediate feedback on bonding quality by analyzing the integrity of test signals transmitted through the bonding interface. This real-time feedback mechanism allows for instant identification of bonding failures, enabling quick decision-making on whether to rework or reject the panel, thereby improving both repair ease and production yield.
Data Source
AI summary
A display panel and a detection method thereof, and a display device are disclosed. The display panel includes a pixel drive circuit, a data drive circuit, a detection circuit, and a power supply circuit. The data drive circuit includes a data driver and multiple data out-put pins that are respectively connected to multiple data lines through bonding. The detection circuit includes a detector and multiple detection ends that are respectively connected to the multiple data output pins and that are each used to receive a signal transmitted from the respective data line to the respective data output pins. After the display panel enters a test mode, a preset timing is provided to drive each control line to be turned on so that each pixel drive subcircuit operates and the detection circuit obtains a detection signal from each data line.