Display Device Power Current Prediction Using AI
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Solution Overview
Problem
The existing display devices require a current sensor to sense the power current, which increases manufacturing costs and may lead to replacement issues due to sensor shortages.
Innovation Solution
A display device is designed to predict the power current using an artificial intelligence model that receives inputs such as luminance efficiency for each color in panel blocks, temperature, deterioration amount of pixels, load of input image data, and position of panel blocks, thereby eliminating the need for a current sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a current sensor is used to sense the power current for luminance control, then the luminance control precision is improved, but the manufacturing cost increases and the device complexity increases
Solution Approach 1:
The patent extracts the current sensing function from a dedicated current sensor and relocates it to the timing controller's existing data processing pathway. By utilizing the data driver's output data as a proxy for power current calculation, the system eliminates the need for separate current sensing hardware while maintaining the ability to control luminance through power current adjustment.
Solution Approach 2:
The timing controller is designed to perform multiple functions: it processes display data, calculates power current based on that data, and controls luminance accordingly. This multi-functional approach allows the same component to handle both data processing and power management tasks, eliminating the need for dedicated current sensing hardware.
2Measurement precision
If a current sensor is used to sense the power current, then the luminance control is improved, but the device complexity increases
Solution Approach 1:
The patent merges the current sensing function with the timing controller's existing data processing capabilities. By combining the calculation of power current with the data processing workflow, the system reduces the number of separate components and simplifies the overall device architecture while maintaining accurate power current measurement.
Solution Approach 2:
The timing controller serves multiple purposes including data processing, power current calculation, and luminance control. This multi-functional design reduces device complexity by eliminating dedicated current sensing components and integrating their functionality into an existing universal controller.
3Measurement precision
If luminance efficiency for each color in panel blocks is used as input to predict power current, then the prediction accuracy is improved, but the data processing complexity increases
Solution Approach 1:
The system performs preliminary calculations of luminance efficiency for each color in panel blocks before using these values to predict power current. By pre-processing the luminance efficiency data during the normal display operation, the system prepares the necessary information in advance, making the power current prediction more accurate without requiring additional complex processing during critical timing operations.
Data Source
AI summary
A display device includes a display panel including a pixel, a data driver which provides a data voltage to the pixel, an artificial intelligence model which receives luminance efficiency for each of colors in each of panel blocks of the display panel and predicts a power current applied to the display panel, and a timing controller which controls the data driver and provides the luminance efficiency for each of the colors to the artificial intelligence model.