Dot-inversion display devices with shared storage capacitors
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) face high power consumption due to inversion techniques like dot inversion, which increases energy usage in battery-powered devices, necessitating the development of display devices and driving methods with low power consumption.
Innovation Solution
The display device incorporates a vertical driver that scans gate lines in sequence and switches polarity on supplemental lines after scanning, allowing for dot-inversion while reducing power consumption by sharing storage capacitors across rows and using a horizontal driver to provide polarity signals through data lines, thereby minimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dot inversion is used to improve display quality, then display quality is improved, but power consumption increases
Solution Approach 1:
The patent segments the display into multiple groups of pixels, where each group shares common data lines and storage capacitors. By organizing pixels in this segmented manner, the system can perform dot inversion while reducing the overall capacitive load on data lines, thereby lowering power consumption while maintaining display quality.
Solution Approach 2:
The patent merges multiple storage capacitors into shared storage capacitor groups that are common to multiple pixels. This merging reduces the total number of capacitive loads that need to be charged and discharged during inversion, directly reducing power consumption while enabling dot inversion for high display quality.
2Use of energy by moving object
If conventional inversion methods are used to reduce power consumption, then power consumption is reduced, but display quality deteriorates
Solution Approach 1:
By segmenting the pixel array into groups that share common data lines and storage capacitors, the patent enables dot inversion (which provides high display quality) while reducing the capacitive load on individual data lines, thus lowering power consumption compared to conventional methods.
Solution Approach 2:
The patent changes the electrical parameters by using shared storage capacitors with higher capacitance values that are common to multiple pixels. This parameter change allows the system to maintain voltage stability during dot inversion while reducing the frequency of charging/discharging operations, thereby lowering power consumption.
3Reliability
If data lines are used as capacitive loads for storage capacitors, then storage function is achieved, but power consumption increases
Solution Approach 1:
The patent merges multiple storage capacitor functions into shared storage capacitor groups that are electrically connected to common data lines. This merging allows multiple pixels to share the same storage capacitor infrastructure, reducing the total capacitive load on data lines and thereby reducing power consumption while maintaining reliable storage function.
Solution Approach 2:
The shared storage capacitors serve multiple pixels simultaneously, making the data lines universal for both data transmission and storage functions. This multi-functionality reduces the overall number of dedicated storage capacitor connections, lowering power consumption while ensuring reliable storage across all pixels.
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 enables dot-inversion with reduced power consumption, maintaining high display quality while lowering energy expenditure, thus suitable for battery-powered devices.
Implementation Method 1
In response to the applied voltage, the liquid crystal within the cell of the pixel changes its rotation and tilt angle, and thus, the amount of light is absorbed or passing therethrough.
Implementation Method 2
a voltage is sent down the correct column. Since other intersecting rows are turned off, only the TFT and capacitor at the particular pixel receives a charge.
Data Source
AI summary
Display devices with low power consumption. In the display device, and first and second data lines, first and second gate lines, first and second supplemental lines, first and second pixels are provided. In the first pixel, a first transistor comprises a first terminal coupled to the first data line and a control terminal coupled to the first gate line, and a first storage capacitor comprises a first terminal coupled to the second terminal of the first transistor and a second terminal coupled to the first supplemental line. In the second pixel, a second transistor comprises a first terminal coupled to the second data line, and a control terminal coupled to the second gate line, and a second storage capacitor comprises a first terminal coupled to the second terminal of the second transistor and a second terminal coupled to the second supplemental line.