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公开(公告)号:US20240339086A1
公开(公告)日:2024-10-10
申请号:US18642765
申请日:2024-04-22
Applicant: Apple Inc.
Inventor: Mahesh B. Chappalli , Assaf Menachem , Daniel Yechiel Dar , Ido Yaacov Soffair
CPC classification number: G09G3/3426 , G09G3/36 , G09G2320/0233 , G09G2320/0247 , G09G2320/041 , G09G2320/043 , G09G2320/046 , G09G2320/0653 , G09G2330/021
Abstract: An electronic display device has a panel that operates in conjunction with a light-emitting diode (LED) backlight. The device “slopes” or gradually ramps a change in brightness of an LED based on a target brightness value of the LED, a current brightness value of the LED, and temperature at the LED. The device also may limit power to the backlight based on an estimated power consumption of a current row of LEDs of the backlight and power consumption of the other rows of LEDs. The device also may determine a reduced voltage to supply to an LED based on a current to supply to the LED to cause the LED to operate. The device also may send an interrupt to the backlight to block updates to the backlight while image content is written to pixels of the panel. The device further compensates for aging of and temperature at an LED.
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公开(公告)号:US20220084477A1
公开(公告)日:2022-03-17
申请号:US17357868
申请日:2021-06-24
Applicant: Apple Inc.
Inventor: Mahesh B. Chappalli , Assaf Menachem , Daniel Yechiel Dar , Ido Yaacov Soffair
Abstract: An electronic display device has a panel that operates in conjunction with a light-emitting diode (LED) backlight. The device “slopes” or gradually ramps a change in brightness of an LED based on a target brightness value of the LED, a current brightness value of the LED, and temperature at the LED. The device also may limit power to the backlight based on an estimated power consumption of a current row of LEDs of the backlight and power consumption of the other rows of LEDs. The device also may determine a reduced voltage to supply to an LED based on a current to supply to the LED to cause the LED to operate. The device also may send an interrupt to the backlight to block updates to the backlight while image content is written to pixels of the panel. The device further compensates for aging of and temperature at an LED.
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公开(公告)号:US11967290B2
公开(公告)日:2024-04-23
申请号:US17357868
申请日:2021-06-24
Applicant: Apple Inc.
Inventor: Mahesh B. Chappalli , Assaf Menachem , Daniel Yechiel Dar , Ido Yaacov Soffair
CPC classification number: G09G3/3426 , G09G3/36 , G09G2320/0233 , G09G2320/0247 , G09G2320/041 , G09G2320/043 , G09G2320/046 , G09G2320/0653 , G09G2330/021
Abstract: An electronic display device has a panel that operates in conjunction with a light-emitting diode (LED) backlight. The device “slopes” or gradually ramps a change in brightness of an LED based on a target brightness value of the LED, a current brightness value of the LED, and temperature at the LED. The device also may limit power to the backlight based on an estimated power consumption of a current row of LEDs of the backlight and power consumption of the other rows of LEDs. The device also may determine a reduced voltage to supply to an LED based on a current to supply to the LED to cause the LED to operate. The device also may send an interrupt to the backlight to block updates to the backlight while image content is written to pixels of the panel. The device further compensates for aging of and temperature at an LED.
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