Display Apparatus Time-Division Driving Circuit Wiring Complexity
Solution Overview
Problem
Conventional display apparatuses with light-emitting portions and through holes on a single-through hole-per-light-emitting portion basis face increased complexity in wiring due to numerous through holes and wiring lines, making alignment and formation of TFTs and through conductors challenging, especially in high-resolution displays.
Innovation Solution
A display apparatus with a time-division driving circuit on the substrate's surface and fewer connection conductors that connect to light-emission control signal lines, allowing for reduced wiring complexity and improved alignment, using through conductors or side conductors to connect driving circuits and signal lines across the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single through hole is provided per light-emitting portion, then electrical connection to each light-emitting portion is achieved, but wiring complexity increases and alignment difficulty arises
Solution Approach 1:
Multiple light-emission control signal lines are merged into a single through-hole connection by implementing a time-division driving circuit. The driving circuit receives multiple control signals through one through-hole and sequentially distributes them to different light-emitting portions via different signal lines, combining multiple connection functions into a single physical connection point.
Solution Approach 2:
A single through-hole connection structure is designed to serve multiple functions by connecting to a time-division driving circuit that can handle multiple light-emission control signals. This universal connection point replaces multiple dedicated through-holes, allowing the same physical structure to fulfill multiple electrical connection roles through temporal signal multiplexing.
2Manufacturing precision
If numerous through holes and wiring lines are provided for high-resolution displays, then each light-emitting portion can be individually controlled, but alignment and formation of TFTs and through conductors becomes challenging
Solution Approach 1:
Multiple through-hole connections are merged into a single through-hole connection by implementing a time-division driving circuit. The driving circuit receives multiple control signals through one through-hole and sequentially distributes them to different light-emitting portions via different signal lines, combining multiple connection functions into a single physical connection point.
Solution Approach 2:
The problem is solved by transitioning from a spatial multiplexing approach (multiple through-holes in different locations) to a temporal multiplexing approach (single through-hole with time-division signal distribution). This dimensional change from space to time reduces the number of physical connection points while maintaining individual control capability.
3Reliability
If multiple connection conductors are provided for each light-emission control signal line, then signal input to light-emitting portions is ensured, but wiring arrangement complexity increases
Solution Approach 1:
Multiple connection conductors carrying different control signals are merged into a single connection conductor by implementing a time-division driving circuit. The circuit sequentially transmits different control signals through the same conductor at different time intervals, combining multiple signal transmission functions into a single physical conductor.
Solution Approach 2:
The time-division driving circuit employs periodic action by sequentially and repeatedly transmitting different light-emission control signals through the same connection conductor at different time intervals. This periodic signal multiplexing allows a single conductor to reliably carry multiple control signals without physical interference.
Data Source
AI summary
A display apparatus includes: a substrate having a first principal surface and a second principal surface opposite to the first principal surface; light-emitting portions disposed on a first principal surface side; a time-division driving circuit which is disposed on the first principal surface side, and outputs a light-emission control signal to the light-emitting portions via respective light-emission control signal lines in a time-division manner; a driving signal line which is disposed on a second principal surface side, and feeds the light-emission control signal to the light-emitting portions via the time-division driving circuit; and a connection conductor which extends from the first principal surface to the second principal surface, and electrically connects the time-division driving circuit and the driving signal line. A number of the connection conductor is smaller than a number of the light-emission control signal lines by electrically connecting the one connection conductor to the light-emission control signal lines.