Electro-optical Device Symmetrical Data Line Driving Circuit Layout
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Solution Overview
Problem
In high-definition electro-optical devices, the arrangement of data line driving circuits along the sides of the display unit leads to increased design complexity and display unevenness due to differences in circuit characteristics, making it difficult to achieve compact and uniform image display.
Innovation Solution
The electro-optical device features first and second data line driving circuits arranged in line symmetry on either side of the display unit, with connection units and power sources also in line symmetry, allowing for reduced size and increased definition without significant design man-hours and minimizing display unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If data line driving circuits are arranged on the upper and lower sides of the display unit, then the device can be reduced in size and increased in definition, but the design period is extended and display unevenness occurs due to characteristic differences
Solution Approach 1:
The patent applies asymmetry in reverse by enforcing symmetry - the first and second data line driving circuits are arranged in line symmetry with respect to the display unit, and their layouts are made symmetrical. This symmetrical arrangement allows one circuit to serve as a template for the other, reducing design time while ensuring consistent characteristics that prevent display unevenness.
Solution Approach 2:
The patent uses copying by making the layout of the second data line driving circuit symmetrical to the first data line driving circuit. This allows the design of one circuit to be replicated for the other, significantly reducing design period and ensuring identical characteristics that prevent display unevenness while maintaining the compact upper-lower arrangement.
2Volume of moving object
If data line driving circuits are arranged on the upper and lower sides of the display unit, then the device can be reduced in size and increased in definition, but display unevenness occurs due to characteristic differences
Solution Approach 1:
The patent applies asymmetry in reverse by enforcing symmetry - the first and second data line driving circuits are arranged in line symmetry with respect to the display unit, and their layouts are made symmetrical. This symmetrical arrangement ensures that both circuits have identical characteristics, preventing display unevenness while maintaining the compact upper-lower arrangement that reduces device size.
Solution Approach 2:
The patent applies homogeneity by ensuring that the first and second data line driving circuits have identical layouts and characteristics through symmetrical arrangement. This homogeneity in circuit design ensures consistent performance across the display, eliminating display unevenness while allowing the circuits to be positioned on opposite sides for compactness.
3Measurement precision
If the pitch of pixel circuits is decreased for high-definition display, then the resolution is improved, but the wiring pitch and transistor arrangement pitch must be reduced increasing device complexity
Solution Approach 1:
The patent applies segmentation by dividing the data line driving function into two separate circuits - a first data line driving circuit and a second data line driving circuit - arranged on opposite sides of the display unit. This segmentation allows each circuit to handle a portion of the data lines, reducing the complexity of wiring and transistor arrangement for each individual circuit while maintaining high-definition display capability.
Data Source
AI summary
An electro-optical device includes a display unit provided with a first pixel circuit connected to a first data line, a second pixel circuit connected to a second data line, a third pixel circuit connected to a third data line, and a fourth pixel circuit connected to a fourth data line, a first data line driving circuit configured to supply a gradation signal to the first data line and the second data line, and a second data line driving circuit configured to supply a gradation signal to the third data line and the fourth data line. The first data line driving circuit and the second data line driving circuit are arranged to sandwich the display unit in a wiring direction of the first data line. A layout of the first data line driving circuit and a layout of the second data line driving circuit are in line symmetry.