Electro-optical Device Reverse-Direction Control Signal Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electro-optical devices, such as liquid crystal projectors, require external circuit connections and dedicated wiring for reversing scanning direction control signals, leading to noise interference and phase differences, which can result in erroneous operations and reduced image quality.
Innovation Solution
An electro-optical device with a substrate-integrated reverse-direction control signal generating circuit that produces both forward and reverse control signals, eliminating the need for external circuit connections and dedicated wiring, thereby stabilizing signal supply and reducing noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external circuit connections and dedicated wiring are used for reverse-direction control signals, then the scanning direction can be reversed, but noise interference and phase differences occur causing erroneous operations
Solution Approach 1:
The patent integrates the reverse-direction control signal generating circuit directly into the substrate with the scanning line drive circuit, merging what were previously separate external components into a unified integrated structure. This eliminates the need for separate wiring paths and external connections, thereby preventing noise interference and phase differences while maintaining the ability to reverse scanning direction.
Solution Approach 2:
The substrate acts as an intermediary medium that hosts both the forward-direction control signal input terminal and the reverse-direction control signal generating circuit. This intermediary structure enables the conversion and distribution of control signals without requiring external wiring, thus isolating the control signals from external noise sources while maintaining functional versatility.
2Adaptability or versatility
If dedicated wiring is extended from external-circuit connecting terminal to scanning line drive circuits, then reverse-direction control signal can be supplied, but wiring path length increases causing noise influence and signal degradation
Solution Approach 1:
The patent combines the reverse-direction control signal generating circuit with the scanning line drive circuit on the same substrate, eliminating the need for extended wiring paths. The control signals are generated and distributed through on-substrate connections rather than through long external wires, thereby reducing noise influence and signal degradation.
Solution Approach 2:
The patent extracts the reverse-direction control signal generating function from the external circuit and relocates it to the substrate. By taking out this function from the external domain and integrating it into the substrate, the patent eliminates the need for long wiring paths while preserving the reverse scanning capability.
3Adaptability or versatility
If reverse-direction control signal is supplied through long wiring path, then scanning direction reversal is achieved, but phase and amplitude differences occur between control signals
Solution Approach 1:
The patent merges the control signal generation and distribution functions on the substrate, ensuring that both forward-direction and reverse-direction control signals are generated through the same integrated circuit structure. This unified approach guarantees consistent phase and amplitude characteristics for both signal types, enabling precise image inversion without signal degradation.
Solution Approach 2:
The patent uses parameter changes in the control signal generation circuitry to achieve scanning direction reversal. By modifying the timing and phase parameters of control signals generated on the substrate, the patent achieves image inversion while maintaining signal integrity and consistency across all scanning lines.
Data Source
AI summary
An electro-optical device includes a substrate, a plurality of pixel portions disposed in a pixel area, a plurality of scanning lines and a plurality of data lines disposed in the pixel area, at least one scanning line drive circuit that supplies scanning signals to the plurality of scanning lines, and at least one reverse-direction control signal generating circuit that generates, based on a forward-direction control signal for controlling the scanning line drive circuit to supply the scanning signals to the plurality of scanning lines in a first order, a reverse-direction control signal for controlling the scanning line drive circuit to supply the scanning signals to the plurality of scanning lines in a second order, which is the reverse of the first order, and that supplies the forward-direction control signal and the reverse-direction control signal to the scanning line drive circuit. The plurality of pixel portions, the plurality of scanning lines and the plurality of data lines, the scanning line drive circuit, and the reverse-direction control signal generating circuit being disposed on the substrate.