Level Shifter Circuit for Flexible Display Panel Voltage Output
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Solution Overview
Problem
Display drivers face challenges in efficiently providing different high voltage signals to display panels due to variations in panel requirements, while operating on low voltage to conserve power, and existing level shifters are not adequately adaptable to these differences.
Innovation Solution
A semiconductor device incorporating a code generator and level shifter with multiple voltage controllers and converters, which output signals at different voltage levels based on a generated code, allowing for flexible voltage control across multiple output terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a level shifter converts low voltage signal to high voltage signal, then power consumption is reduced, but adaptability to different display panels is insufficient
Solution Approach 1:
The level shifter is divided into multiple voltage controllers (first through fourth voltage controllers) and voltage converters (first through fourth voltage converters), each responsible for specific output terminals. This segmentation allows independent control of voltage levels for different display panels, resolving the contradiction between power efficiency and adaptability.
Solution Approach 2:
The voltage controllers and converters are dynamically enabled or disabled based on the code input and display panel requirements. The code generator produces unique codes for different panels, and the system dynamically activates only the necessary voltage conversion paths, achieving both power savings and adaptability.
2Adaptability or versatility
If multiple voltage controllers and converters are used to provide different high voltage signals, then adaptability to different display panels is improved, but device complexity increases
Solution Approach 1:
Each voltage controller and converter is designed with multi-functionality to handle different voltage level requirements. The same structural units (controllers and converters) serve multiple purposes across different output terminals and display panel configurations, reducing overall device complexity while maintaining high adaptability.
Solution Approach 2:
The patent uses replicated voltage controller and converter units for different output terminals. Instead of designing entirely separate circuits for each voltage level, standardized units are copied and configured through code control, simplifying the design process and reducing complexity while providing diverse voltage outputs.
3Use of energy by moving object
If voltage controllers are enabled to output signals at first voltage level, then power consumption is optimized, but voltage level flexibility is reduced
Solution Approach 1:
The system uses periodic code generation and evaluation to determine which voltage controllers and converters should be enabled. Based on the displayed content and panel requirements, the system periodically adjusts the enabled state of voltage conversion units, optimizing power consumption while maintaining voltage level flexibility when needed.
Data Source
AI summary
A semiconductor device includes a code generator and a level shifter. The code generator generates a code including one bit that is in a first logic state and at least one bit that is in a second logic state. The level shifter outputs signals that are at a first voltage level or at a second voltage level through a plurality of output terminals in response to the code. The level shifter includes a plurality of voltage controllers and a plurality of voltage converters. All but one of the voltage controllers control first signals output through all but one of the output terminals to be at the first voltage level in response to the at least one bit. One of the voltage converters controls a second signal output through the remaining output terminal to be at the second voltage level in response to the first signals.