18483282. Electronic Devices With Low Refresh Rate Display Pixels simplified abstract (Apple Inc.)
Electronic Devices With Low Refresh Rate Display Pixels
Organization Name
Inventor(s)
Chin-Wei Lin of San Jose CA (US)
Shyuan Yang of San Jose CA (US)
Chuang Qian of Santa Clara CA (US)
Abbas Jamshidi Roudbari of Saratoga CA (US)
Ting-Kuo Chang of San Jose CA (US)
Electronic Devices With Low Refresh Rate Display Pixels - A simplified explanation of the abstract
This abstract first appeared for US patent application 18483282 titled 'Electronic Devices With Low Refresh Rate Display Pixels
Simplified Explanation
The patent application describes a display technology using organic light-emitting diode (OLED) pixels with a low refresh rate. Each pixel consists of six thin-film transistors and one capacitor. One of the transistors acts as the drive transistor and is compensated using the remaining five transistors and the capacitor. The technology also includes on-bias stress operations to mitigate first frame dimming, multiple anode reset and on-bias stress operations during vertical blanking periods to reduce flicker and maintain balance, and the use of two different emission signals controlled by pulse width modulation to achieve darker black levels.
- The display technology uses OLED pixels with a low refresh rate.
- Each pixel consists of six thin-film transistors and one capacitor.
- One transistor serves as the drive transistor and is compensated using the other five transistors and the capacitor.
- On-bias stress operations are applied before threshold voltage sampling to mitigate first frame dimming.
- Multiple anode reset and on-bias stress operations are inserted during vertical blanking periods to reduce flicker and maintain balance.
- Two different emission signals controlling each pixel are toggled together using pulse width modulation to achieve darker black levels.
Potential Applications
- High-quality displays for televisions, smartphones, and other electronic devices.
- Virtual reality and augmented reality headsets with improved visual performance.
- Medical imaging displays with enhanced image quality and accuracy.
Problems Solved
- Mitigates first frame dimming, which can affect the initial brightness of the display.
- Reduces flicker during vertical blanking periods, improving visual comfort.
- Improves first frame performance by inserting anode reset and on-bias stress operations between data refreshes.
Benefits
- Enhanced display quality with darker black levels.
- Reduced flicker for improved visual comfort.
- Improved first frame performance for a better user experience.
Original Abstract Submitted
A display may have an array of organic light-emitting diode display pixels operating at a low refresh rate. Each display pixel may have six thin-film transistors and one capacitor. One of the six transistors may serve as the drive transistor and may be compensated using the remaining five transistors and the capacitor. One or more on-bias stress operations may be applied before threshold voltage sampling to mitigate first frame dimming. Multiple anode reset and on-bias stress operations may be inserted during vertical blanking periods to reduce flicker and maintain balance and may also be inserted between successive data refreshes to improve first frame performance. Two different emission signals controlling each pixel may be toggled together using a pulse width modulation scheme to help provide darker black levels.
