US 12,008,958 B2
HDR OLED display power control
Nobuyuki Suzuki, Kirkland, WA (US); Baek Woon Lee, Bellevue, WA (US); Ying Zheng, Sammamish, WA (US); Samu Matias Kallio, Redmond, WA (US); and Kari Jussi Ropo, Redmond, WA (US)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Jul. 27, 2022, as Appl. No. 17/815,480.
Prior Publication US 2024/0038166 A1, Feb. 1, 2024
Int. Cl. G09G 3/3233 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 2300/0828 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/0286 (2013.01); G09G 2310/0289 (2013.01); G09G 2310/0294 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0626 (2013.01); G09G 2330/021 (2013.01); G09G 2330/028 (2013.01); G09G 2360/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An organic light emitting diode (OLED) display system configured to reproduce high dynamic range (HDR) video and reduce power consumption, the OLED display system comprising:
an OLED array of OLED pixels;
a power management system configured to provide power to the OLED pixels, the power management system comprising at least one voltage generator that generates OLED voltages for OLED emission in the OLED array, the at least one voltage generator comprising a pixel digital-to-analog converter (DAC) reference voltage generator that generates a pixel DAC reference voltage and an electroluminescent (EL) cathode bias voltage generator that generates an EL cathode bias voltage;
a timing microcontroller comprising a decoder/encoder configured to receive HDR pixel data and output display pixel data; and
a memory storing instructions executable by the timing microcontroller to:
sample a sampled portion of the HDR pixel data;
determine a luminance index value of the sampled portion of the HDR pixel data, wherein the luminance index value corresponds to a maximum luminance of the sampled portion of the HDR pixel data; and
use the luminance index value to control the pixel DAC reference voltage generator and the electroluminescent (EL) cathode bias voltage generator.