Alternating Transistor Inverter Circuit for LCD Heat Management
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Solution Overview
Problem
Conventional inverter circuits for LCD devices generate excessive heat due to simultaneous operation of transistors, leading to potential damage and burnout of chips over time, as heat dissipation is inefficient.
Innovation Solution
The inverter circuit design alternates the operation of transistors in each chip, ensuring only one transistor is active at a time, reducing heat accumulation and enhancing heat emission efficiency, thereby minimizing the risk of chip damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transistors operate simultaneously in conventional inverter circuits, then the circuit can drive multiple loads effectively, but excessive heat is generated leading to chip damage and burnout
Solution Approach 1:
The patent implements periodic action by alternating the operation of transistor pairs in different chips. The control circuit switches between different transistor combinations in a periodic manner, ensuring that not all transistors operate simultaneously. This periodic switching pattern reduces peak heat generation while maintaining continuous load driving capability across multiple chips.
Solution Approach 2:
The patent applies segmentation by dividing the transistor operations across multiple chips, with each chip containing specific transistor pairs. By segmenting the overall switching operation into distributed chip-level operations and coordinating them through a control circuit, the system spreads heat generation across multiple components rather than concentrating it in a single location, thereby managing thermal loads more effectively.
2Power
If multiple transistors operate at the same time, then the inverter can handle higher power loads, but heat dissipation becomes inefficient causing chip impairment
Solution Approach 1:
The control circuit implements periodic switching patterns that activate different transistor pairs at different time intervals. This ensures that while power handling capacity is maintained through coordinated operation of multiple transistors, no single chip experiences continuous high thermal stress, thereby preserving chip durability and system reliability.
Solution Approach 2:
The patent merges the operational functions of multiple transistor pairs across different chips into a coordinated system. By combining the switching actions of various transistor pairs under unified control, the system achieves high power handling capacity while distributing thermal loads across multiple chips, preventing any single chip from experiencing excessive heat that would compromise reliability.
3Productivity
If transistors are switched on and off frequently, then AC voltage is generated effectively, but heat accumulation occurs reducing system reliability
Solution Approach 1:
The patent uses periodic action to control the switching of transistor pairs in a coordinated fashion. The control circuit generates periodic square wave signals that switch transistor pairs on and off in an alternating pattern, efficiently generating AC voltage at the transformer outputs. Simultaneously, the periodic nature of this switching ensures that heat generation is distributed over time rather than concentrated, maintaining system reliability.
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 design effectively decreases heat accumulation in each chip, improving heat emission efficiency and reducing the risk of chip impairment or burnout, thus enhancing the reliability of the inverter circuit.
Implementation Method 1
a first transformer (15) including a first primary winding (151), a second primary winding (152), and a first secondary winding (154)... a second transformer (16) including a third primary winding (161), a fourth primary winding (162), and a second secondary winding (164)... outputting an alternating current voltage
Data Source
AI summary
An exemplary inverter circuit (2) includes a first switch circuit (22) including a first transistor (221) and a second transistor (222); a second switch circuit (23) including a third transistor (231) and a fourth transistor (232); and a pulse width modulation circuit (21) including a first output terminal (211) and a second output terminal (212). A gate electrode of the first transistor is connected to the first output port. A gate electrode of the second transistor is connected to the second output port. A gate electrode of the third transistor is connected to the first output port. A gate electrode of the fourth transistor is connected to the second output port. A drain electrode of the third transistor is connected to a drain electrode of the first transistor, and a drain electrode of the fourth transistor is connected to a drain electrode of the second transistor.