Display Device Conductive Layer for High-Voltage Noise Shielding
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Solution Overview
Problem
Display devices are susceptible to operational interference from external high voltage noise, which affects the driver's performance.
Innovation Solution
A display device design incorporating a conductive layer maintained at a predetermined potential, such as ground potential, overlapping the signal driver and other critical components, to shield against external noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a driver is provided on the display panel, then the display device can be integrated and compact, but the driver operation is adversely influenced by external high voltage noise
Solution Approach 1:
A conductive layer is introduced as an intermediary between the external environment and the driver circuit. This conductive layer acts as a shield that intercepts and redirects external high voltage noise, preventing it from reaching and interfering with the driver operation on the display panel.
Solution Approach 2:
The conductive layer converts the harmful effect of external noise into a beneficial shielding effect. By positioning the conductive layer to overlap with the driver region, the noise that would otherwise directly interfere with the driver is instead captured and dissipated by the conductive shield, protecting the integrated driver circuit.
2Device complexity
If external high voltage noise is present, then the display device structure remains simple, but the display quality deteriorates due to flickering and noise interference
Solution Approach 1:
The conductive layer serves as a mediating shield between the external noise source and the sensitive display components. It intercepts high voltage noise before it can cause flickering or interference, thereby improving display quality without requiring complex noise filtering circuits or shielding mechanisms.
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 conductive layer effectively suppresses noise interference, improving display quality by preventing flickering and stabilizing the operation of the signal driver and sensor components.
Implementation Method 1
a conductive layer maintained at a predetermined potential... the conductive layer overlaps the extension portion in plan view... when, for example, high voltage is applied as a noise which comes from the outside, the operation of the driver is sometimes adversely influenced
Data Source
AI summary
According to one embodiment, a display device includes a first substrate, a second substrate opposing the first substrate, a wiring substrate connected to the first substrate, a cover member located on an opposite side to the first substrate so as to interpose the second substrate therebetween and a conductive layer maintained at a predetermined potential, and the first substrate includes an extension portion extending further from the second substrate, the wiring substrate is connected to the extension portion, the cover member includes a first surface opposing the extension portion, and the conductive layer overlaps the extension portion in plan view.