Power Management IC Authentication for Display Devices
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Solution Overview
Problem
The existing communication methods between a timing controller and a power management integrated circuit in display devices can lead to the leakage of proprietary technology, as manufacturers can easily identify and understand the operating conditions and proprietary technologies used by other manufacturers, compromising intellectual property.
Innovation Solution
Implementing an authentication mechanism where the power management integrated circuit operates in either a normal mode or a protection mode based on a comparison between an authentication hex value received from the timing controller and a result hex value generated using specific authentication formulas, preventing unauthorized access to proprietary technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power management integrated circuit communicates with the timing controller using I2C communication to change operating conditions, then the ease of operation is improved, but the loss of information (proprietary technology leakage) worsens
Solution Approach 1:
An authentication mechanism is introduced as an intermediary between the timing controller and power management integrated circuit. The timing controller generates authentication data based on driving set data and transmits it to the power management integrated circuit. The power management integrated circuit verifies this authentication data before allowing operating condition changes, preventing unauthorized access to proprietary technologies while maintaining ease of operation for authorized changes
2Ease of operation
If the power management integrated circuit allows easy identification of specifications to understand proprietary technology, then the ease of operation is improved, but the loss of information (intellectual property leakage) worsens
Solution Approach 1:
The authentication mechanism performs preliminary verification before allowing any operating condition changes. The timing controller generates authentication data from driving set data, and the power management integrated circuit verifies this data before processing. This preliminary anti-action prevents unauthorized manufacturers from accessing or understanding proprietary technologies embedded in the power management integrated circuit, while still allowing easy operation for authorized devices
Data Source
AI summary
A display device includes a display panel, a display panel driving circuit, and a power management integrated circuit that generates driving voltages, receives driving set data from a timing controller, stores driving hex values corresponding to the driving set data in first internal registers, and determines voltage levels of the driving voltages based on the driving hex values. The power management integrated circuit divides the driving hex values into upper and lower decimal values, derives a result decimal value by applying the upper and lower decimal values to a first authentication-formula, generates a result hex value based on the result decimal value, compares an authentication hex value corresponding to authentication data received from the timing controller with the result hex value, and selectively operates in a normal mode or in a protection mode based on a comparison result between the authentication hex value and the result hex value.