Display Driving Controller With Dynamic Overcurrent Feedback
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Solution Overview
Problem
Existing display devices face issues with excessive power consumption due to overcurrents, which can lead to potential damage and inefficiencies.
Innovation Solution
A driving controller is introduced with a luminance controller, overcurrent control determiner, current sensor, switching circuit, and current controller to manage current flow and prevent overcurrents by adjusting the gate control signal through a current adjust transistor, utilizing transistors and resistors to regulate voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If current is increased to drive the display panel, then brightness and image quality are improved, but power consumption increases excessively
Solution Approach 1:
The patent implements dynamic current control by continuously monitoring the actual current through a current sensor and adjusting the driving current in real-time based on feedback. The controller dynamically modifies the gate control signal to the current adjust transistor, enabling the display panel to operate at optimal current levels rather than fixed high current, thus reducing power consumption while maintaining required brightness.
Solution Approach 2:
The patent employs a feedback mechanism where the current sensor detects the actual current flowing to the display panel and feeds this information back to the controller. The controller compares the actual current with reference values and adjusts the driving current accordingly through the current adjust transistor, preventing both overcurrent (excessive power consumption) and undercurrent (insufficient brightness).
2Power
If driving voltage is increased to improve display performance, then image quality is enhanced, but overcurrent occurs causing potential damage
Solution Approach 1:
The patent implements preliminary protective action by continuously monitoring the driving current before it can cause damage. The current sensor detects overcurrent conditions in real-time, and the controller preemptively adjusts the gate control signal to reduce current through the current adjust transistor, preventing potential damage before it occurs rather than reacting after damage happens.
Solution Approach 2:
The patent introduces a current adjust transistor as an intermediary component between the power source and the display panel. This transistor acts as a controllable current regulator, allowing the controller to precisely modulate the current flowing to the display panel, thereby enabling high driving power when needed while preventing dangerous overcurrent levels that could cause damage.
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
The solution effectively reduces power consumption and prevents damage by dynamically managing current levels, ensuring efficient operation of the display panel.
Implementation Method 1
a current sensor that receives an input current through a first voltage line transferring a first driving voltage, compares the input current and a reference current
Implementation Method 2
a switching circuit that is connected between a second voltage line and a first node and adjusts a current flowing between the second voltage line and the first node in response to a gate control signal
Data Source
AI summary
Disclosed is a driving controller which includes a luminance controller calculating a load of an input image signal, an overcurrent control determiner comparing the load and a reference load and outputting an enable signal corresponding to a result of comparing the load and the reference load, a current sensor receiving an input current through a first voltage line transferring a first driving voltage, comparing the input current and a reference current in response to the enable signal, and outputting a first signal corresponding to a result of comparing the input current and the reference current, a switching circuit connected between a second voltage line and a first node and adjusting a current flowing between the second voltage line and the first node in response to a gate control signal, and a current controller outputting the gate control signal corresponding to the current in response to the first signal.