Automotive chipsets support functional safety in high resolution displays
Chipsets designed to drive and control automotive LCDs, including larger high resolution monitors used for navigation and the instrument cluster, have been announced by Rohm Semiconductor.
They integrate a gamma correction IC, timing controller, source driver, and gate driver for driving HD/FHD class displays, along with a power management IC (PMIC). Each is designed to share information as needed, and marks the first time functional safety has been successfully introduced in devices for displays. Compatibility with LCDs for side mirrors and speedometers that can lead to accidents is also provided.
A fail function in the timing controller verifies operation, making it possible to configure high resolution LCD panels, says the company. Each IC configured in the chipset integrates a function for mutually selecting the expected failure mode. As a result, it is possible to complementarily detect panel failure and confirm and provide feedback on information such as input signals to the LCD as well as peeling/destruction of the LCD driver.
The PMIC includes a double register for detecting abnormalities and auto-refresh function to enable recovery during abnormal operation, ensuring high reliability against unexpected influences such as noise.