Display Device Through Hole Data Line Pitch and Sequence
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Solution Overview
Problem
The challenge is to prevent deterioration in image quality due to the presence of a through hole in the active area of a display device, particularly as bezel sizes decrease and optical modules are integrated into these areas, causing capacitance coupling effects that lead to signal interference and vertical stains.
Innovation Solution
A display device design featuring a through hole in the active area with a hole bezel zone surrounding it, where data lines have a smaller wire pitch and a distinct arrangement sequence compared to the active area, with bridge areas to change the sequence and alternate metal layers to minimize capacitance coupling, and time-division-driven data signals with opposite polarities applied adjacent to each other to offset coupling effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a through hole is formed in the active area to mount an optical module, then the optical module can be integrated into the display device, but capacitance coupling occurs between adjacent data lines causing signal interference and vertical stains
Solution Approach 1:
The patent applies different wire pitch configurations to different regions: the active area uses a first wire pitch while the hole bezel zone uses a second wire pitch. This local differentiation allows the through hole to be accommodated in the active area without causing capacitance coupling issues, as the altered wire pitch in the hole bezel zone compensates for the disturbance caused by the through hole.
Solution Approach 2:
The patent changes the wire pitch parameter from the first wire pitch in the active area to the second wire pitch in the hole bezel zone. This parameter modification adjusts the electrical characteristics of the data lines in the region surrounding the through hole, thereby preventing capacitance coupling and signal interference while maintaining optical module integration capability.
2Area of stationary object
If the wire pitch is reduced in the hole bezel zone to accommodate the through hole, then the through hole can be disposed in the active area, but capacitance coupling between adjacent data lines increases
Solution Approach 1:
The patent implements local quality by assigning different wire pitch characteristics to different zones: the active area maintains its original wire pitch while the hole bezel zone adopts a modified wire pitch. This localized adjustment enables the through hole to be positioned in the active area without causing excessive capacitance coupling, as the special wire pitch configuration in the hole bezel zone compensates for the reduced spacing.
Solution Approach 2:
The patent modifies the wire pitch parameter specifically in the hole bezel zone surrounding the through hole. By changing this geometric parameter, the electrical characteristics of the data lines are adjusted to prevent capacitance coupling effects, thereby enabling active area utilization for the through hole without generating harmful electromagnetic interference.
3Device complexity
If data lines are arranged in a conventional sequence, then the wiring structure is simple, but image quality deteriorates due to vertical stains caused by capacitance coupling
Solution Approach 1:
The patent applies different data line arrangement sequences to different regions: a first arrangement sequence is used in the active area while a second arrangement sequence is used in the hole bezel zone. This local differentiation maintains relatively simple wiring structures in the majority of the display while preventing vertical stains and image quality deterioration in the critical region surrounding the through hole.
Solution Approach 2:
The patent changes the arrangement sequence parameter of the data lines in the hole bezel zone from the conventional first sequence to a modified second sequence. This parameter change reconfigures the spatial distribution of data lines in the region affected by the through hole, thereby eliminating capacitance coupling-induced vertical stains while maintaining overall wiring structure simplicity.
Data Source
AI summary
Disclosed is a display device including a panel including an active area in which a plurality of subpixels is disposed, a through hole formed through the active area of the panel, a hole bezel zone disposed between the through hole and the active area so as to surround the through hole, and a plurality of data lines extending from a first active area of the active area to a second active area of the active area via the hole bezel zone, the plurality of data lines having a smaller wire pitch in the hole bezel zone than in the first active area and the second active area, wherein a first arrangement sequence of the plurality of data lines disposed in the first active area and a second arrangement sequence of the plurality of data lines disposed in the hole bezel zone are different from each other.