LED Transfer Inspection During Display Panel Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During the manufacturing process of display devices, particularly those using light emitting diodes, the inspection of light emitting devices before transfer can increase process time, and omitting this inspection may result in non-functional display panels due to improperly functioning light emitting devices being transferred.
Innovation Solution
An apparatus and method for manufacturing display devices that includes a support member for light emitting devices, a transfer device, and a light receiving unit to inspect the light emitting devices during the transfer process, ensuring normal operation by detecting emitted light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inspection of light emitting devices is performed before transfer, then reliability of display panel is improved, but productivity deteriorates due to increased process time
Solution Approach 1:
The patent performs light emission inspection of light emitting devices on the second support member before the transfer process begins. This preliminary inspection identifies and excludes defective devices, ensuring that only functional devices are transferred to the display panel, thereby improving reliability without adding post-transfer repair steps
Solution Approach 2:
The inspection process is merged with the transfer process by performing inspection on the second support member before transfer. The light receiving unit detects light from devices positioned on the second support member, and this inspection is integrated into the overall manufacturing flow, allowing defective devices to be identified and excluded before they are transferred to the display panel
2Productivity
If inspection of light emitting devices is omitted, then productivity is improved by reducing process time, but reliability deteriorates due to non-functional display panels
Solution Approach 1:
The patent performs light emission inspection of light emitting devices on the second support member before the transfer process begins. This preliminary inspection identifies and excludes defective devices, ensuring that only functional devices are transferred to the display panel, thereby improving reliability without adding post-transfer repair steps
Solution Approach 2:
The light emitting devices are inspected while positioned on the second support member using the light receiving unit. The system uses its own positioning mechanism to facilitate inspection, and defective devices are identified through their failure to emit light when stimulated, allowing the process to self-select functional devices for transfer
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
Facilitates efficient inspection of light emitting devices during transfer, reducing the risk of non-functional display panels and potentially eliminating the need for repair processes.
Implementation Method 1
a light receiving unit that detects light emitted from the plurality of light emitting devices for inspecting the plurality of light emitting devices
Data Source
AI summary
An apparatus for manufacturing a display device includes a transfer device that transfers a plurality of light emitting devices to a display panel and a light receiving unit that detects light emitted from the plurality of light emitting devices. In addition, a method for manufacturing a display device includes contacting a stamp of a transfer device with the light emitting device and inspecting whether the light emitting device normally emits light, in a state in which the stamp and the light emitting device are in contact with each other.