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公开(公告)号：US20240086014A1
公开(公告)日：2024-03-14
申请号：US18514934
申请日：2023-11-20
Applicant: Apple Inc.
Inventor： Rungrot Kitsomboonloha , Donggeon Han , Jason N Gomez , Kyung Wook Kim , Nikolaus Hammler , Pei-En Chang , Saman Saeedi , Shih Chang Chang , Shinya Ono , Suk Won Hong , Szu-Hsien Lee , Victor H Yin , Young-Jik Jo , Yu-Heng Cheng , Joyan G Sanctis , Hongwoo Lee
CPC classification number: G06F3/04182 , G06F3/044 , H10K59/40 , G06F3/0412 , G06F2203/04107 , G06F2203/04112
Abstract: An electronic device may have a display with touch sensors. One or more shielding layers may be interposed between the display and the touch sensors. The shielding layers may include shielding structures such as a conductive mesh structure and/or a transparent conductive film. The shielding structures may be actively driven or passively biased. In the active driving scheme, one or more inverting circuits may receive a noise signal from a cathode layer in the display and/or from the shielding structures, invert the received noise signal, and drive the inverted noise signal back onto the shielding structures to prevent any noise from the display from negatively impacting the performance of the touch sensors. In the passive biasing scheme, the shielding structures may be biased to a power supply voltage.
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公开(公告)号：US11861110B1
公开(公告)日：2024-01-02
申请号：US17956715
申请日：2022-09-29
Applicant: Apple Inc.
Inventor： Rungrot Kitsomboonloha , Donggeon Han , Jason N Gomez , Kyung Wook Kim , Nikolaus Hammler , Pei-En Chang , Saman Saeedi , Shih Chang Chang , Shinya Ono , Suk Won Hong , Szu-Hsien Lee , Victor H Yin , Young-Jik Jo , Yu-Heng Cheng , Joyan G Sanctis , Hongwoo Lee
CPC classification number: G06F3/04182 , G06F3/044 , H10K59/40 , G06F3/0412 , G06F2203/04107 , G06F2203/04112
Abstract: An electronic device may have a display with touch sensors. One or more shielding layers may be interposed between the display and the touch sensors. The shielding layers may include shielding structures such as a conductive mesh structure and/or a transparent conductive film. The shielding structures may be actively driven or passively biased. In the active driving scheme, one or more inverting circuits may receive a noise signal from a cathode layer in the display and/or from the shielding structures, invert the received noise signal, and drive the inverted noise signal back onto the shielding structures to prevent any noise from the display from negatively impacting the performance of the touch sensors. In the passive biasing scheme, the shielding structures may be biased to a power supply voltage.
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公开(公告)号：US12197679B2
公开(公告)日：2025-01-14
申请号：US18312889
申请日：2023-05-05
Applicant: Apple Inc.
Inventor： Sagar R. Vaze , Yu-Heng Cheng , Prathit Bugnait , Isaac W. Chan
Abstract: Differential driving and/or sensing can reduce noise in a touch screen. In some examples, the touch electrodes and/or routing traces can be implemented using metal mesh in first and second metal layers. To mitigate electrical interference at the touch screen from a display, a display-noise shield or sensor can be provided between the display and the touch screen. In some examples, a shield can minimize a noise contribution from the display to signals generated at the touch screen. In other examples, a sensor can enable a differential read out of signals at the touch screen that subtracts a noise component measured by the sensor. Forming the shield or sensor, and the touch screen over the display using an on-cell process can improve touch screen performance and yield. The shield can be connected to a conductive ring and flex circuit via tapping points in a stackup separate from a display stackup.
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