Display Device Static Electricity Protection via Color Filter
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Solution Overview
Problem
Display devices are susceptible to damage from static electricity, which can flow through wires and affect insulating layers and switching elements, causing defects.
Innovation Solution
Incorporating gaps or discontinuities in conductive lines and using a color filter to minimize light leakage, along with a capacitor formed between a dummy pattern and a conductor to prevent static electricity from reaching the display area, and employing a sealant and light blocking member to block moisture and light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gaps or discontinuities are introduced in conductive lines to block static electricity, then reliability is improved, but light leakage increases
Solution Approach 1:
A color filter layer is introduced as an intermediary substance between the gaps in conductive lines and the display area. This mediator blocks light leakage through the gaps while maintaining the electrical discontinuity needed to prevent static electricity flow, thus resolving the contradiction between reliability improvement and light leakage prevention
Solution Approach 2:
The color filter layer serves multiple functions simultaneously: it acts as a light-blocking layer to prevent light leakage through gaps, and it also serves as part of the protective structure against static electricity. By making the color filter multi-functional, the patent resolves the contradiction without requiring additional components
2Object-affected harmful factors
If a color filter is added to block light leakage through gaps, then light leakage is reduced, but device complexity increases
Solution Approach 1:
The color filter layer is designed to serve dual purposes: preventing light leakage through gaps and maintaining structural integrity of the display device. By making this layer multi-functional, the patent reduces the need for additional separate components, thereby limiting the increase in device complexity while still achieving light leakage prevention
3Reliability
If a sealant is applied between color filter and common electrode to block moisture, then reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The sealant is applied in advance between the color filter and common electrode to create a protective barrier against moisture before final assembly is completed. This prior cushioning approach ensures that even if alignment precision is not perfect, the sealant provides a buffer that maintains reliability by preventing moisture ingress through minor gaps or misalignments
Data Source
AI summary
A display device including a first substrate having a display area and a peripheral area surrounding the display area, a second substrate facing the first substrate, a common voltage line disposed on the peripheral area of the first substrate, a color filter disposed on the common voltage line overlapping the common voltage line, a common electrode disposed below the second substrate and having an opening overlapping the common voltage line and the color filter, and a sealant disposed between the color filter and the common electrode overlapping the common voltage line, the color filter, and the opening.