Partial Controller Gate Signal Interception for LCD Power Reduction
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Solution Overview
Problem
Conventional liquid crystal display (LCD) devices with gate-on-glass (GOG) type configurations face challenges in efficiently displaying images on only a part of the screen without increasing power consumption, as they require complex control operations to write data voltages in non-image sections, leading to unnecessary power usage.
Innovation Solution
The implementation of a liquid crystal display device with a partial controller that intercepts and controls gate signals to specific gate lines, allowing for image display on only a part of the screen, along with a timing controller that manages driving timings and supplies pixel data to the data driver, reducing power consumption by selectively driving gate lines and data voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional LCD devices display images on only a part of the screen, then image display flexibility is improved, but power consumption increases due to complex control operations in non-image sections
Solution Approach 1:
The patent extracts and removes the need for complex control operations in non-image sections by introducing a partial controller that selectively controls gate signals only for the required display region. This eliminates unnecessary power consumption associated with controlling the entire screen area while maintaining the ability to display images on partial regions.
Solution Approach 2:
The patent segments the gate driver control into two parts: a main gate driver for general control and a partial controller for selective control of specific gate lines. This segmentation allows the system to control only the necessary portions of the display, reducing power consumption while maintaining adaptability for partial screen display.
2Ease of manufacture
If conventional LCD devices use gate-on-glass configuration, then manufacturing cost is reduced, but control complexity increases when displaying on partial screen
Solution Approach 1:
The patent segments the control architecture by adding a partial controller that works alongside the existing gate driver. This segmentation allows the GOG configuration to maintain its manufacturing simplicity while the partial controller handles the additional complexity of partial screen control, preventing the entire system from becoming overly complex.
Solution Approach 2:
The partial controller serves multiple functions: it selectively controls gate signals for partial display regions, manages power consumption by disabling unnecessary gate lines, and maintains compatibility with the existing GOG architecture. This multi-functionality reduces the need for completely new control systems, preserving ease of manufacture.
3Area of stationary object
If conventional LCD devices write data voltages in non-image sections, then complete screen coverage is achieved, but power consumption increases unnecessarily
Solution Approach 1:
The patent applies partial action by controlling the gate driver to activate only the gate lines corresponding to the required display region. This prevents data voltages from being written to non-image sections, eliminating unnecessary power consumption while achieving complete coverage of the intended display area.
Solution Approach 2:
The patent implements local quality control by enabling different gate lines selectively based on the display requirements. Regions requiring image display receive active gate signals and data voltages, while non-image regions remain inactive, optimizing power consumption locally across different parts of the screen.
Data Source
AI summary
A liquid crystal display device including a liquid crystal panel, a gate driver configured to supply gate signals to gate lines on the liquid crystal panel, a data driver configured to supply data voltages to data lines on the liquid crystal panel, and a partial controller configured to control the gate driver to intercept a part of the gate signals to be supplied to the gate lines.