17870576. SYSTEMS AND METHODS FOR INCREASING A PULSE WIDTH MODULATION FREQUENCY WHILE PRESERVING RESOLUTION simplified abstract (Apple Inc.)

SYSTEMS AND METHODS FOR INCREASING A PULSE WIDTH MODULATION FREQUENCY WHILE PRESERVING RESOLUTION

Organization Name

Apple Inc.

Inventor(s)

Behzad Mohtashemi of Los Gatos CA (US)

Mohammad J Navabi-shirazi of Phoenix AZ (US)

Feng Guo of Santa Clara CA (US)

Omar Alnaggar of Palo Alto CA (US)

Venkataraman V Iyer of Sunnyvale CA (US)

Jingdong Chen of San Jose CA (US)

Yang Zhang of Saratoga CA (US)

Ming Gu of San Jose CA (US)

Asif Hussain of Clearwater FL (US)

SYSTEMS AND METHODS FOR INCREASING A PULSE WIDTH MODULATION FREQUENCY WHILE PRESERVING RESOLUTION - A simplified explanation of the abstract

This abstract first appeared for US patent application 17870576 titled 'SYSTEMS AND METHODS FOR INCREASING A PULSE WIDTH MODULATION FREQUENCY WHILE PRESERVING RESOLUTION

Simplified Explanation

The patent application describes a system and method for increasing the frequency of a pulse width modulation (PWM) clock while preserving the resolution of the PWM signal. This is achieved by dividing the brightness code by a multiple M, which allows for driving an electronic display backlight system.

• The system allows for increasing the frequency of a PWM clock while maintaining the resolution of the PWM signal.
• The system includes backlight dimming circuitry that receives a brightness code and generates the PWM signal by dividing the brightness code by a multiple M.
• The backlight element is driven by the PWM signal over a PWM clock cycle equal to M times the baseline PWM clock frequency.
• This innovation enables efficient control of the backlight element in electronic display systems.

Potential Applications

• Electronic display systems, such as LCD or LED displays, that require backlight control.
• Mobile devices, such as smartphones or tablets, with adjustable display brightness.
• Televisions or computer monitors that utilize PWM for backlight dimming.

Problems Solved

• Preserves the resolution of the PWM signal while increasing the frequency of the PWM clock.
• Provides efficient control of the backlight element in electronic display systems.
• Allows for precise adjustment of display brightness.

Benefits

• Improved visual experience with higher PWM clock frequency.
• Efficient use of backlight power.
• Enhanced control over display brightness.
• Enables smoother dimming transitions in electronic display systems.

Original Abstract Submitted

Systems and methods for preserving a pulse width modulation (PWM) resolution while increasing the frequency of a pulse width modulation (PWM) clock are provided. An electronic display backlight system may include a backlight element and backlight dimming circuitry. The backlight element may be driven according to a pulse width modulation (PWM) signal over a PWM clock cycle equal to a multiple M of a baseline PWM clock frequency associated with a baseline PWM resolution. The backlight dimming circuitry may receive a brightness code of the baseline PWM resolution and generate the PWM signal at least in part by dividing the brightness code by M.