Voltage Level Generating Device for IC Area Reduction
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Solution Overview
Problem
Conventional common voltage level generating devices in driver integrated circuits require large circuit layout areas and high power consumption due to the need for multiple buffers and operational amplifiers, which increases static current consumption and power usage.
Innovation Solution
A voltage level generating device comprising a reference voltage generating module, a first circuit module, a second circuit module, and a switch module, which reduces the circuit layout area by using a buffer, a voltage regulator, and an arithmetic logic unit (ALU) to generate and selectively output different voltage levels, thereby minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple buffers and operational amplifiers are used to generate different voltage levels, then the voltage level generation capability is improved, but the circuit layout area increases
Solution Approach 1:
The patent combines multiple voltage level generation functions into a single integrated circuit block. The first and second circuit modules are merged to generate both first voltage level (VCOMH) and second voltage level (VCOML) within the same circuit architecture, reducing the overall circuit layout area while maintaining the capability to generate multiple voltage levels.
Solution Approach 2:
The circuit modules are designed with multi-functionality to perform multiple operations. The switch module can selectively output different voltage levels (VCOMH or VCOML) based on operational requirements, allowing a single circuit configuration to serve multiple voltage generation purposes without requiring separate dedicated circuits for each voltage level.
2Adaptability or versatility
If multiple buffers and operational amplifiers are used to generate different voltage levels, then the voltage level generation capability is improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic voltage level selection through the switch module, which can dynamically choose between outputting the first voltage level (VCOMH) or the second voltage level (VCOML) based on real-time operational requirements. This dynamic switching capability allows the system to adapt power consumption levels to actual needs, avoiding continuous high power consumption while maintaining voltage level generation versatility.
Solution Approach 2:
The circuit modules can change their output voltage parameters dynamically. By adjusting the output voltage levels according to different operational modes (such as different display refresh rates or power saving modes), the system optimizes power consumption while maintaining the necessary voltage level generation capabilities for various display conditions.
3Use of energy by stationary object
If high resistance value resistor units are used to reduce static current consumption, then the power consumption is reduced, but the circuit complexity increases
Solution Approach 1:
The patent employs resistor units with specifically optimized resistance values that balance static current consumption reduction with circuit simplicity. By carefully selecting resistance parameters, the design achieves low static current consumption without requiring overly complex circuit configurations or additional compensation components.
Data Source
AI summary
The present invention discloses a voltage level generating device. The voltage level generating device includes: a reference voltage generating module, a first circuit module, a second circuit module, and a switch module. The voltage level generating device disclosed in the present invention only requires a buffer, a voltage regulator, and a arithmetic logic unit (ALU) to attain the same function of the conventional common voltage level generating device, and thus the circuit layout area can be reduced so as to decrease the cost of the integrated circuit (IC). In addition, the voltage level generating device disclosed in the present invention also can select different output of voltage level in order to reduce the power consumption of a display device.