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公开(公告)号：US20240373721A1
公开(公告)日：2024-11-07
申请号：US18568070
申请日：2022-05-10
Applicant: Apple Inc.
Inventor： Bulong Wu , Zhen Zhang , Paul S Drzaic , Yong Sun , Izhar Z Ahmed , Kuan H Lu , Han-Chieh Chang , Mingjing Ha , Yung-Yu Hsu
IPC: H10K59/80 , H10K77/10 , H10K102/00
Abstract: An electronic device may have a display overlapped by a display cover layer. Portions of the surface of the display and cover layer may have curved profiles. For example, a display cover layer may have transparent sidewall portions with curved surface profiles. The transparent sidewall portions of the display cover layer may include rounded corners having areas of compound curvature. A flexible display panel may be pressed over a mold to impart desired curvature (such as compound curvature) to the flexible display panel. To mitigate wrinkling in a flexible display panel molded to have compound curvature, a backfilm may be included that absorbs compressive strains in the display panel. The backfilm may have a coefficient of thermal expansion that is higher than that of the display panel. Instead or in addition, the backfilm may have portions with different Young's modulus magnitudes or different thickness magnitudes.
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公开(公告)号：US20180174505A1
公开(公告)日：2018-06-21
申请号：US15895248
申请日：2018-02-13
Applicant: Apple Inc.
Inventor： Prashant Mandlik , Bhadrinarayana Lalgudi Visweswaran , Izhar Z Ahmed , Zhen Zhang , Tsung-Ting Tsai , Ki Yeol Byun , Yu Cheng Chen , Sungki Lee , Mohammad Hajirostam , Sinan Alousi
CPC classification number: G09G3/32 , G01L1/2281 , G09G3/3266 , G09G3/3677 , G09G2300/043 , G09G2310/0286 , G09G2330/12 , G09G2380/02 , G11C19/28 , H01L27/3225 , H01L27/3276 , H01L51/0031 , H01L51/0097 , H01L2251/5338
Abstract: An electronic device may have a flexible display such as an organic light-emitting diode display. A strain sensing resistor may be formed on a bent tail portion of the flexible display to gather strain measurements. Resistance measurement circuitry in a display driver integrated circuit may make resistance measurements on the strain sensing resistor and a temperature compensation resistor to measure strain. A crack detection line may be formed from an elongated pair of traces that are coupled at their ends to form a loop. The crack detection line may run along a peripheral edge of the flexible display. Crack detection circuitry may monitor the resistance of the crack detection line to detect cracks. The crack detection circuitry may include switches that adjust the length of the crack detection line and thereby allow resistances to be measured for different segments of the line.
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公开(公告)号：US11087670B2
公开(公告)日：2021-08-10
申请号：US15895248
申请日：2018-02-13
Applicant: Apple Inc.
Inventor： Prashant Mandlik , Bhadrinarayana Lalgudi Visweswaran , Izhar Z Ahmed , Zhen Zhang , Tsung-Ting Tsai , Ki Yeol Byun , Yu Cheng Chen , Sungki Lee , Mohammad Hajirostam , Sinan Alousi
Abstract: An electronic device may have a flexible display such as an organic light-emitting diode display. A strain sensing resistor may be formed on a bent tail portion of the flexible display to gather strain measurements. Resistance measurement circuitry in a display driver integrated circuit may make resistance measurements on the strain sensing resistor and a temperature compensation resistor to measure strain. A crack detection line may be formed from an elongated pair of traces that are coupled at their ends to form a loop. The crack detection line may run along a peripheral edge of the flexible display. Crack detection circuitry may monitor the resistance of the crack detection line to detect cracks. The crack detection circuitry may include switches that adjust the length of the crack detection line and thereby allow resistances to be measured for different segments of the line.
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