Display Device Dummy Pad Interference Reduction
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Solution Overview
Problem
Display devices face issues with electromagnetic interference between signals inputted through adjacent pads, which can lead to short-circuiting, compromising the reliability and performance of the device.
Innovation Solution
Incorporating dummy pads and lines with voltage levels that are averages or intermediate between control signals, positioned between control pads, to reduce electromagnetic interference and prevent short-circuiting by minimizing voltage level differences between adjacent pads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If signals are inputted through densely packed pads, then the device can be driven with various signals, but electromagnetic interference occurs between adjacent pads
Solution Approach 1:
A dummy pad is positioned between the first control pad and the second control pad to act as an intermediary element. This dummy pad receives a dummy signal with a voltage level between the voltage levels of the control signals applied to the adjacent control pads, thereby mediating the electromagnetic interaction and preventing direct interference between the control pads
2Object-affected harmful factors
If dummy pads are positioned between control pads, then electromagnetic interference is reduced, but the pad structure becomes more complex
Solution Approach 1:
The dummy pad serves multiple functions: it acts as an electromagnetic shield between control pads, provides a reference voltage level, and maintains signal integrity. By combining these functions into a single element, the solution reduces electromagnetic interference without proportionally increasing structural complexity
Data Source
AI summary
A display device includes a pixel, a first control pad, a second control pad, and a first dummy pad. The pixel may emit light with luminance corresponding to a data signal. Supply of the data signal to the pixel depends on a first control signal and a second control signal. The first control pad is connected to a first control line for supplying the first control signal. The second control pad is connected to a second control line for supplying the second control signal. The first dummy pad is positioned between the first control pad and the second control pad and may receive a first dummy signal. A voltage level of the first dummy signal is in a range from a voltage level of the first control signal to a voltage level of the second control signal.