Driver Chip Temperature Control Circuit for Excessive Current
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Solution Overview
Problem
High power consumption and excessive temperature in driver chips of large-sized, high-resolution, and high-refresh-frequency display apparatuses lead to potential chip burnout, exceeding junction and operation surface temperature specifications.
Innovation Solution
A temperature control circuit for driver chips that includes a switching transistor, comparison circuit, and control circuit to detect excessive driving currents by comparing voltages against a reference threshold, adjusting gate electrode signals, and implementing cooling modes to reduce temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the driver chip operates at high power consumption to support large size, high resolution, and high refresh frequency, then the display performance is improved, but the temperature of the driver chip exceeds the specification and reliability deteriorates
Solution Approach 1:
The patent implements preliminary temperature monitoring and current detection before the driver chip reaches dangerous temperature levels. The temperature control circuit continuously monitors the driving current and compares it against threshold values, enabling early intervention through current reduction before thermal damage occurs, thus preventing rather than reacting to overheating
Solution Approach 2:
The patent establishes a feedback mechanism where the temperature control circuit monitors the driving current, compares it with reference voltages representing current thresholds, and automatically adjusts the driving current downward when excessive current is detected. This closed-loop control ensures the driver chip operates within safe temperature boundaries while maintaining optimal performance when conditions permit
2Speed
If the driving current is increased to support high refresh frequency and resolution, then the display quality is improved, but the driver chip temperature exceeds safe operating limits
Solution Approach 1:
The patent makes the driving current dynamic rather than fixed. The temperature control circuit continuously adjusts the driving current based on real-time monitoring conditions, comparing detected voltages against reference thresholds. This dynamic adjustment allows the system to optimize refresh frequency and resolution while automatically reducing current when temperature constraints are approached, balancing performance with reliability
3Device complexity
If no cooling measures are taken to maintain simplicity, then device complexity is reduced, but the driver chip will burn out leading to product failures
Solution Approach 1:
The patent implements a self-service protection mechanism where the temperature control circuit autonomously monitors driving current and automatically reduces current when excessive conditions are detected, without requiring external cooling systems or manual intervention. The circuit uses internal comparison logic against reference voltages to self-regulate and protect the driver chip, achieving reliable thermal management through simplicity
Solution Approach 2:
The patent introduces a temperature control circuit as an intermediary protection layer between the power supply and the driver chip. This intermediate circuit monitors the driving current and inserts current reduction control when necessary, acting as a protective mediator that prevents direct thermal damage to the driver chip while maintaining overall system simplicity
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
Effectively prevents driver chip burnout by detecting and reducing excessive currents and temperatures, maintaining operational safety and efficiency.
Implementation Method 1
the comparison circuit is configured to compare a magnitude relationship between a voltage on the second comparison end and the first reference voltage and output a comparison result
Implementation Method 2
a switching transistor, including a gate electrode, a first electrode and a second electrode; the control circuit outputs a control signal to the switching transistor, so as to adjust an output current on the boost circuit
Implementation Method 3
the boost circuit is configured to supply a driving voltage to the driver chip
Data Source
AI summary
A temperature control circuit of a driver chip, a temperature control method of the driver chip, a power management integrated chip, a timing control driver board and a display apparatus are disclosed. The temperature control circuit includes a switching transistor, a comparison circuit and a control circuit; a first electrode of the switching transistor is connected with a first node, a second comparison end and the first electrode or a second electrode of the switching transistor are connected to a second node; the control circuit is configured to output a first reference voltage to the comparison circuit, the comparison circuit is configured to compare a magnitude relationship between a voltage on the second comparison end and the first reference voltage and output a comparison result; the control circuit acquires the comparison result and determines whether an output current on the boost circuit is excessively large.