Backlight and LCD Bias Reference Design for 90-Hz Refresh-Rate Virtual/Augmented Reality Displays
Description
This reference design describes the power solution for LCD displays in wearable devices: especially in augmented-reality (AR) and virtual reality (VR) headsets. The high current accuracy backlight driver is achieved by LP8556: which provides high current during small duty cycle synchronized with refresh rate. The LCD bias power driver is provided by TPS65132: which is simple to use and has a small package. The detailed design theory: component selection: and test results are also discussed.
Features
- Strobe backlight with 90HzSupport 50mA with 6 channelsBacklight on with 10% duty burst modeSupports one Li-ion battery input or 12-V adaptor input
Applications
- Digital still camera
- Aircraft cockpit display
- Interconnect/distribution box
- STB & DVR
- Virtual reality headset
- Broadcast reference monitor
- Circuit breaker (ACB
- MCCB
- VCB)
- Smartphone
Product Categories
- Power management