Current Sensor Generating Multi-Period Data for Display Control
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Solution Overview
Problem
Existing display devices face challenges in quickly providing various sensing currents to controllers, which are necessary for controlling luminance, driving voltage, and voltage supply in display panels.
Innovation Solution
A current sensor is designed to generate first, second, and third current data sets, including average, minimum, and maximum sensing currents for different periods, allowing for quick provision of sensing currents to controllers and enabling precise control of display panel operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a current sensor samples current at a high frequency to provide various sensing currents quickly to controllers, then the speed of providing sensing currents is improved, but the complexity of the current sensor increases
Solution Approach 1:
The current sensor is divided into multiple independent data generators (first current data generator, second current data generator, third current data generator), each responsible for generating specific types of current data (first current data, second current data, third current data) with different characteristics. This segmentation allows each generator to be optimized for its specific function while working together to provide comprehensive sensing current data to controllers at high speed.
2Adaptability or versatility
If multiple controllers require various sensing currents for different control functions, then the versatility of the system is improved, but the complexity of current data generation increases
Solution Approach 1:
The current sensor employs multiple data generators that produce different types of current data (first, second, and third current data) from the same sampling source. Each data generator processes the sampled current data differently to create specialized current data suitable for different controller functions (luminance control, driving voltage control, over-current protection), making the system universally applicable to various control needs without requiring separate sensing systems.
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 current sensor effectively provides sensing currents suitable for different controllers, enabling rapid and accurate control of display panel operations, including luminance, driving voltage, and voltage supply, thereby enhancing the overall performance and efficiency of the display device.
Implementation Method 1
an analog-to-digital converter which converts a voltage between opposite terminals of a sensing resistor connected to the power line into the sensing currents based on the sampling frequency
Data Source
AI summary
A display device may include a display panel which displays an image based on image data, a power supply which provides a driving voltage to the display panel through a power line, a current sensor which generates first current data including average, minimum, and maximum sensing currents of a first period based on sensing currents generated by sampling a current flowing through the power line at a sampling frequency, generates second current data including average, minimum, and maximum sensing currents of a second period less than the first period based on the sensing currents, and includes a first controller controlling the image data or the power supply based on the second current data, and a timing controller which communicates with the current sensor, and includes a second controller controlling the image data or the power supply based on the first and second current data.