Display Panel Current Feedback for Communication Fault Protection
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Solution Overview
Problem
Display panels in light emitting display devices are prone to damage due to poor communication with current sensors, leading to potential malfunctions and reduced performance.
Innovation Solution
A display device comprising a display panel, a voltage generator, a current detector, and a current controller, which includes a current comparison unit and a protection operating unit to monitor and adjust driving currents, preventing damage by detecting and responding to changes in load and current levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current detector and current controller communicate to monitor driving current, then the reliability of display panel operation is improved, but the complexity of the communication system increases
Solution Approach 1:
The patent implements a feedback mechanism where the current detector continuously monitors the driving current of the display panel and communicates current status information to the current controller. The current controller adjusts driving parameters based on this feedback to prevent overcurrent conditions, thereby improving operational reliability through closed-loop control.
Solution Approach 2:
The patent introduces a communication interface as an intermediary between the current detector and current controller. This intermediary component facilitates reliable current status transmission while isolating the complexity of communication protocols from the core current control functionality, managing system complexity through modular design.
2Measurement precision
If the voltage generator adjusts driving voltage based on voltage control signal, then the current management precision is improved, but the device complexity increases
Solution Approach 1:
The voltage generator receives a voltage control signal that is generated based on feedback from the current detector's monitoring of driving current. This feedback loop enables the voltage generator to dynamically adjust the driving voltage to maintain precise current management, improving precision through adaptive control.
Solution Approach 2:
The patent combines the voltage control functionality with the current management system. The voltage generator is integrated into the current control loop, where it works cooperatively with the current detector and current controller to achieve precise current management through coordinated voltage adjustment.
3Object-affected harmful factors
If the protection operating unit monitors communication between current detector and current controller, then the display panel protection is improved, but the system complexity increases
Solution Approach 1:
The protection operating unit implements preliminary anti-action by continuously monitoring communication between the current detector and current controller to detect potential communication failures or abnormal conditions before they can cause display panel damage. This preventive monitoring allows the system to take protective action in advance.
Solution Approach 2:
The protection operating unit uses feedback from communication monitoring to detect abnormal conditions. When communication anomalies are detected, the unit generates protection signals to prevent harmful effects, applying feedback control to safeguard the display panel against potential damage.
Data Source
AI summary
Disclosed is a display device including a display panel, a voltage generator, a current detector, and a current controller. The display panel includes a pixel for receiving a driving voltage. The voltage generator generates the driving voltage, determines a voltage level of the driving voltage based on a voltage control signal, and performs a protection operation in response to a protection signal. The current detector detects a driving current of the display panel and outputs a current signal corresponding to the detected driving current. The current controller includes a current comparison unit that generates a result signal by comparing a present current level of the current signal from the current detector to a previous current level and a protection operating unit that receives the result signal and outputs the protection signal based on a change in the load and a difference between the target current and the current signal.