Display Data Driving Chip Overcurrent Protection Circuit
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Solution Overview
Problem
Existing display devices lack effective control over power supply to driving chips, leading to potential overcurrent issues that can affect the reliability and efficiency of the display panel's operation.
Innovation Solution
Incorporating a power controller that utilizes sensors and comparators to monitor power currents in data driving chips, generating signals to block power when overcurrent is detected, ensuring safe and efficient power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is continuously supplied to data driving chips, then the display device can maintain normal operation, but overcurrent issues may occur that affect reliability
Solution Approach 1:
The patent implements preliminary protection by providing a power control circuit that proactively monitors power consumption of data driving chips before overcurrent damage occurs. The circuit detects abnormal power consumption levels and preemptively blocks power supply to affected chips, preventing overcurrent issues from developing into reliability problems.
2Reliability
If power control circuits with sensors are added to each data driving chip, then overcurrent can be detected and blocked, but device complexity increases
Solution Approach 1:
The patent segments the power control function by providing separate power control circuits for different data driving chips (e.g., first power control circuit for first data driving chip, second power control circuit for second data driving chip). Each segment independently monitors and controls power to its associated chip, enabling granular overcurrent protection while distributing the complexity across multiple independent units rather than requiring a single complex centralized controller.
Data Source
AI summary
A display device includes: a first data driving chip including: a first data driving circuit to generate a first data signal; and a first sensor to sense a first overcurrent flowing in the first data driving circuit based on a first power current flowing in the first data driving circuit to generate a first signal; a second data driving chip including: a second data driving circuit to generate a second data signal; and a second sensor to sense a second overcurrent flowing in the second data driving circuit based on a second power current flowing in the second data driving circuit to generate a second signal; and a power controller to control first and second powers respectively supplied to the first and second data driving chips, and to block at least one of the first and second powers based on at least one of the first and second signals.