Alternating Gate Lines for LCD Driving Unit Load Reduction
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Solution Overview
Problem
The existing liquid crystal display (LCD) technologies face a significant burden on the data driving unit due to the need for quick switching of data voltages between sub-pixel electrodes, leading to increased power consumption and potential flickering issues.
Innovation Solution
The implementation of a display apparatus with alternating first and second gate lines, where each pixel comprises a first and second sub-pixel electrode, allowing for independent voltage application, and a gate driving unit that applies gate-on voltages to scanning groups of gate lines in specific orders to reduce the load on the data driving unit by minimizing the variation in data voltage polarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data voltages are quickly switched between sub-pixel electrodes to control electric field intensity and orientation, then picture quality is improved, but the load on the data driving unit increases and power consumption increases
Solution Approach 1:
The gate lines are divided into two independent sets (first gate lines and second gate lines) that alternate with each other. Each set controls different sub-pixel electrodes independently, allowing the data driving unit to maintain constant voltage polarity for longer periods while still achieving precise control over the electric field in each sub-pixel, thereby reducing power consumption while maintaining picture quality.
2Adaptability or versatility
If data voltages are quickly switched between sub-pixel electrodes, then electric field control is improved, but the period that switching devices are enabled decreases, increasing the burden on the data driving unit
Solution Approach 1:
The gate driving unit is segmented into two independent driving circuits that respectively control the first and second gate lines. This segmentation allows each circuit to operate independently with its own scanning sequence, enabling flexible and precise control of the electric field in different sub-pixel regions without requiring the data driving unit to perform complex rapid switching operations.
Solution Approach 2:
The patent implements dynamic scanning sequences where the gate driving unit can selectively enable different scanning patterns for the first and second gate lines based on the display content and timing requirements. This dynamic control allows the system to adapt the switching frequency and timing to minimize the burden on the data driving unit while maintaining precise electric field control when needed.
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 approach reduces the load on the data driving unit by minimizing the frequency of voltage polarity changes and enhances the rotational force and response speed of liquid crystal molecules, thereby improving picture quality and reducing flickering.
Implementation Method 1
An electric field is generated in the liquid crystal layer by applying a data voltage to pixel electrodes and applying a common voltage to a common electrode
Implementation Method 2
LCDs are comprised of two substrates on which a plurality of electrodes are formed and a liquid crystal layer is interposed between the two substrates
Data Source
AI summary
A display apparatus including a plurality of data lines which transmit a data signal received from a data driving unit, a plurality of first gate lines and a plurality of second gate lines, which cross the data lines and are arranged in such a manner that the first gate lines and the second gate lines alternate with each other, a plurality of pixels which are defined by the data lines, the first gate lines, and the second gate lines, each of the pixels including a first sub-pixel electrode to which a first data voltage is applied by a first switching device connected to one of the first gate lines and a second sub-pixel electrode to which a second data voltage is applied by a second switching device connected to one of the second gate lines, and a gate driving unit which selects a scanning group including two or more first gate lines and two or more second gate lines, applies a gate-on voltage to the first gate lines of the scanning group according to a first predetermined scanning order, and applies the gate-on voltage to the second gate lines of the scanning group according to a second predetermined scanning order.