Display Device Wiring Segmentation for Lower Signal Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices face issues with increased wiring resistance and signal delay, particularly at the ends of control signal lines, leading to voltage drop and potential visual recognition of divided regions due to increased space between distribution circuits, which are unsuitable for high-definition displays in applications like VR, AR, and MR.
Innovation Solution
The display device incorporates a substrate with scanning and signal lines arranged in different directions, utilizing a driver IC mounted along the signal line selection circuit, with buffer circuits at both ends, and a wiring configuration that includes first, second, and third wires to reduce impedance and improve signal control, allowing for time-division multiplexing of pixel signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control lines are provided at the center of the substrate to reduce wiring resistance, then wiring resistance is reduced, but voltage drop and delay at both ends of the control signal lines increases
Solution Approach 1:
The patent segments the control signal line into multiple sections by providing control lines at both ends of the distribution circuit rather than just at the center. This segmentation allows control signals to be supplied from multiple directions, reducing the effective length of high-resistance paths and minimizing voltage drop and delay at the ends of the signal lines.
Solution Approach 2:
The patent transitions from a single-center control line approach to a multi-dimensional wiring structure by adding control lines at both ends of the distribution circuit. This dimensional expansion of the control signal distribution network reduces the maximum distance any pixel must receive control signals, thereby reducing overall signal delay while maintaining low wiring resistance.
2Reliability
If control signal lines are coupled to both ends of each distribution circuit to reduce waveform rounding, then waveform quality is improved, but the number of control signal lines increases and space between distribution circuits increases
Solution Approach 1:
The control signal lines are designed to serve multiple functions simultaneously: they provide control signals to reduce waveform rounding while also defining the boundaries between distribution circuit regions. By making the control signal lines serve dual purposes, the patent avoids needing additional dedicated spacing elements, thus reducing the overall space between distribution circuits while maintaining waveform quality.
3Reliability
If more control signal lines are provided to reduce waveform rounding, then signal quality is improved, but definition of the display panel decreases due to larger space between distribution circuits
Solution Approach 1:
The patent applies local quality by providing control lines specifically at critical locations (both ends of the distribution circuit) rather than uniformly across the entire substrate. This localized approach improves signal quality where it is most needed (at the distribution circuit boundaries) while minimizing the overall space occupied by control lines, thereby preserving display definition.
Data Source
AI summary
A display device includes a substrate having a display region in which a plurality of pixels are arrayed in a first direction and a second direction different from the first direction, a plurality of scanning lines coupled to the pixels arrayed in the first direction, a plurality of signal lines coupled to the pixels arrayed in the second direction, a gate driver configured to supply a scanning signal to the scanning lines in a selection period of the scanning lines, a signal line selection circuit configured to supply a pixel signal to the signal lines in a selection period of the signal lines, and a driver IC.