Electrooptic Driving Circuit Voltage Amplitude Reduction
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Solution Overview
Problem
Existing electrooptic devices, such as liquid crystal devices, face complexity in circuit configuration when trying to reduce the voltage amplitude of data lines, which is necessary for high-definition display, and this complexity hinders efficient operation.
Innovation Solution
A driving circuit configuration that includes scanning lines, data lines, capacitor lines, and storage capacitors, where the voltage of capacitor lines is selectively shifted or held to reduce the voltage amplitude applied to pixel capacitors, allowing for high-definition display with a simpler circuit design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If storage capacitors are connected to capacitor lines that share lines with scanning-line driving circuits, then voltage amplitude of data lines is reduced, but circuit configuration becomes complicated
Solution Approach 1:
The capacitor lines are divided into first and second capacitor lines that are selectively connected to different scanning lines. This segmentation allows independent control of voltage application to storage capacitors, enabling voltage amplitude reduction without requiring complex shared line configurations.
Solution Approach 2:
The circuit employs dynamic switching mechanisms where the first and second capacitor lines are selectively connected to different scanning lines based on selection signals. This dynamic reconfiguration enables flexible voltage control while maintaining a relatively simple static circuit structure.
2Manufacturing precision
If voltage amplitude of data lines is reduced for high-definition display, then display quality improves, but circuit configuration complexity increases
Solution Approach 1:
Capacitor lines are introduced as intermediary elements between the scanning-line driving circuit and the storage capacitors. These intermediary lines enable voltage amplitude reduction by providing dedicated pathways for voltage control, thereby achieving high-definition display without directly complicating the main data transmission paths.
Solution Approach 2:
The circuit changes the voltage parameter dynamically by selectively connecting capacitor lines to different scanning lines. This parameter change approach enables precise control of voltage amplitude applied to pixel capacitors, achieving high-definition display through controlled voltage modulation rather than complex circuit topologies.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively reduces the voltage amplitude of data lines, enabling high-definition display while maintaining a straightforward circuit structure, thus improving display quality and reducing power wastage due to parasitic capacitance.
Implementation Method 1
a pixel capacitor disposed between the pixel switching element and the common electrode
Implementation Method 2
a storage capacitor disposed between one end of the pixel capacitor and one of the first and second capacitor lines corresponding to the scanning line
Implementation Method 3
when one scanning line is selected, shifts the voltage of a first capacitor line corresponding one scanning line to a predetermined voltage, and when a scanning line apart from one scanning line by predetermined number of lines is selected, changes the predetermined voltage by a predetermined value or holds the predetermined voltage
Data Source
AI summary
A driving circuit of an electrooptic device comprises: a plurality of scanning lines; a plurality of data lines; first and second capacitor lines; a common electrode; pixels, the pixels each including: a pixel switching element; a pixel capacitor; and a storage capacitor; a scanning-line driving circuit; and a capacitor-line driving circuit that shifts the voltage of a first (or second) capacitor line corresponding one scanning line to a predetermined voltage when said one scanning line is selected, and when a scanning line apart from said one scanning line by predetermined number of lines is selected, changes the predetermined voltage by a predetermined value or holds the predetermined voltage; and when said one scanning line is selected; and a data-line driving circuit.