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公开(公告)号:US11158256B2
公开(公告)日:2021-10-26
申请号:US16762846
申请日:2018-09-28
Applicant: Apple Inc.
Inventor: Chin-Wei Lin , Fan Gui , Hung Sheng Lin , Hyunwoo Nho , Jie Won Ryu , Junhua Tan , Kingsuk Brahma , Majid Gharghi , Mohammad Reza Esmaeili Rad , Shinya Ono , Yun Wang , Zino Lee
IPC: G09G3/3233 , G09G3/3275
Abstract: A display may include an array of organic light-emitting diode display pixels having transistors characterized by threshold voltages subject to transistor variations. Compensation circuitry may be used to sense a current from selected display pixels. A display pixel may include a drive transistor, a gate setting transistor for driving a reference voltage onto the gate terminal of the drive transistor, a data loading and current sensing transistor for connecting the drive transistor to a data/current-sensing line, a light-emitting diode, an emission control transistor coupled between the drive transistor and the diode, and an anode resetting transistor for selectively resetting the anode terminal of the diode. During in-frame current sensing operations, the emission control transistor may be turned off to decouple the drive transistor from the diode, thereby blocking off any residue current and lateral leakage current that may be present at the diode.
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公开(公告)号:US20230081342A1
公开(公告)日:2023-03-16
申请号:US17859835
申请日:2022-07-07
Applicant: Apple Inc.
Inventor: Chin-Wei Lin , Aida R Colon-Berrios , Fan Gui , Levent Erdal Aygun , Mohammad Reza Esmaeili Rad , Ran Tu , Xin Lin , Yun Wang
IPC: G09G3/3233 , H01L27/32
Abstract: A display may include an array of pixels. Each pixel in the array may include a drive transistor, emission transistors, a data loading transistor, a gate voltage setting transistor, an initialization transistor, an anode reset transistor, a storage capacitor, and an optional current boosting capacitor coupled in series with an isolation transistor. A data refresh may include a initialization phase, a threshold voltage sampling phase, and a data programming phase. The threshold voltage sampling phase can be substantially longer than the data programming phase to decrease a current sampling level during the threshold voltage sampling phase, which helps reduce the display luminance sensitivity to temperature variations. During a data refresh, the isolation transistor can be turned on to provide current boosting. During emission periods, the isolation transistor is turned off to prevent cathode noise from potentially coupling through to one or more direct-current voltage nodes in the pixel.
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公开(公告)号:US20250095540A1
公开(公告)日:2025-03-20
申请号:US18815162
申请日:2024-08-26
Applicant: Apple Inc.
Inventor: Vehbi Calayir , Weimin Zhang , Bret Rothenberg , Zhongyuan Ren , Fenghua Zheng , Mohammad Reza Esmaeili Rad
IPC: G09G3/20
Abstract: A power management integrated circuit (PMIC) of an electronic display may include image data reference voltage adjustment circuitry, a negative supply voltage generator that may generate a negative supply voltage with multiple negative supply voltages, and/or a dedicated timing controller. The image data reference voltage adjustment circuitry may tune image data reference voltages for generating programming voltages based on receiving an indication of an undesired direct current (DC) voltage offset, an undesired alternating current (AC) noise, or both. The image data reference voltage adjustment circuitry may receive the indication from a display panel of the electronic display. The negative supply voltage generator may elevate a voltage of the negative supply voltage to reduce a power consumption of the electronic display. The dedicated timing controller may improve (e.g., reduce length of) a frequency range of one or more switched voltages of the PMIC to reduce front of screen artifacts.
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公开(公告)号:US11004391B2
公开(公告)日:2021-05-11
申请号:US16869329
申请日:2020-05-07
Applicant: Apple Inc.
Inventor: Hei Kam , Junhua Tan , Wei H. Yao , Shihchang Chang , Derek K. Shaeffer , Chaohao Wang , Hyunwoo Nho , Yun Wang , Baris Cagdaser , Majid Gharghi , Yongjun Li , Aida Raquel Colon-Berrios , Mohammad Reza Esmaeili Rad , Hyunsoo Kim , Alex H. Pai , Hsin-Ying Chiu , Jiun-Jye Chang , Ching-Sang Chuang , Xin Lin
IPC: G09G3/32 , G09G3/3233 , G09G3/36 , G09G3/3291
Abstract: An electronic device includes an electronic display having an active area comprising a pixel. The electronic device also includes processing circuitry configured to receive image data and predict a change in threshold voltage associated with a transistor of the pixel based at least in part on the image data. Furthermore, the processing circuitry is configured to adjust the image data to generate adjusted image data based at least in part on the predicted change in threshold voltage.
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公开(公告)号:US20190088207A1
公开(公告)日:2019-03-21
申请号:US16134802
申请日:2018-09-18
Applicant: Apple Inc.
Inventor: Chin-Wei Lin , Majid Gharghi , Mohammad Reza Esmaeili Rad , Yun Wang , Jie Won Ryu , Kingsuk Brahma , Shingo Hatanaka , Shinya Ono , Ting-Kuo Chang
IPC: G09G3/3266 , G09G3/3233
Abstract: A display may have rows and columns of pixels. Gate lines may be used to supply gate signals to rows of the pixels. Data lines may be used to supply data signals to columns of the pixels. The data lines may include alternating even and odd data lines. Data lines may be organized in pairs each of which includes one of the odd data lines and an adjacent one of the even data lines. Demultiplexer circuitry may be configured dynamically during data loading and pixel sensing operations. During data loading, data from display driver circuitry may be supplied, alternately to odd pairs of the data lines and even pairs of the data lines. During sensing, the demultiplexer circuitry may couple a pair of the even data lines to sensing circuitry in the display driver circuitry and then may couple a pair of the odd data lines to the sensing circuitry.
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公开(公告)号:US11854490B1
公开(公告)日:2023-12-26
申请号:US17879642
申请日:2022-08-02
Applicant: Apple Inc.
Inventor: Levent Erdal Aygun , Chin-Wei Lin , Yun Wang , Xin Lin , Aida R Colon-Berrios , Shih Chang Chang , Fan Gui , Mohammad Reza Esmaeili Rad , Ran Tu , Warren S Rieutort-Louis , Abbas Jamshidi Roudbari , Bhadrinarayana Lalgudi Visweswaran , Cheng-Chih Hsieh , Ricardo A Peterson , Shyuan Yang , Ting-Kuo Chang , Tsung-Ting Tsai , Yuchi Che
IPC: G09G3/3266 , G09G3/00 , H01L27/12
CPC classification number: G09G3/3266 , G09G3/007 , H01L27/124 , G09G2300/0452 , G09G2300/0861 , G09G2310/0286 , G09G2320/0626 , G09G2330/021
Abstract: To reduce the amount of space occupied in the inactive area of a display by gate driver circuitry, at least a portion of the gate driver circuitry may be positioned in the active area of the display. To accommodate the gate driver circuitry, emissive sub-pixels may be laterally shifted relative to corresponding thin-film transistor sub-pixels. This allows for the thin-film transistor sub-pixels to be grouped adjacent to the central area of the active area, leaving room along an edge of the active area to accommodate one or more additional display components such as gate driver circuitry or fanout portions of data lines.
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公开(公告)号:US20210012712A1
公开(公告)日:2021-01-14
申请号:US16762846
申请日:2018-09-28
Applicant: Apple Inc.
Inventor: Chin-Wei Lin , Fan Gui , Hung Sheng Lin , Hyunwoo Nho , Jie Won Ryu , Junhua Tan , Kingsuk Brahma , Majid Gharghi , Mohammad Reza Esmaeili Rad , Shinya Ono , Yun Wang , Zino Lee
IPC: G09G3/3233
Abstract: A display may include an array of organic light-emitting diode display pixels having transistors characterized by threshold voltages subject to transistor variations. Compensation circuitry may be used to sense a current from selected display pixels. A display pixel may include a drive transistor, a gate setting transistor for driving a reference voltage onto the gate terminal of the drive transistor, a data loading and current sensing transistor for connecting the drive transistor to a data/current-sensing line, a light-emitting diode, an emission control transistor coupled between the drive transistor and the diode, and an anode resetting transistor for selectively resetting the anode terminal of the diode. During in-frame current sensing operations, the emission control transistor may be turned off to decouple the drive transistor from the diode, thereby blocking off any residue current and lateral leakage current that may be present at the diode.
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公开(公告)号:US20180224996A1
公开(公告)日:2018-08-09
申请号:US15662003
申请日:2017-07-27
Applicant: Apple Inc.
Inventor: Mohammad Reza Esmaeili Rad , Shinya Ono , Ting-Kuo Chang
CPC classification number: G06F3/0416 , G01B7/18 , G06F3/041 , G06F3/045 , G06F3/046 , G06F2203/04102 , H01L27/323 , H01L27/3276 , H01L51/0096 , H01L51/5209 , H01L51/5225 , H01L51/56 , H01L2227/323
Abstract: A force input sensor can include a strain-sensitive region disposed as a meandering electrical trace onto a structural or functional layer of a display stack. In particular, the meandering electrical trace can include one or more diversions from a linear path, each diversion configured to increase the length of the electrical trace. A diversion can form a loop to increase the inductance of the meandering electrical trace; the inductance of the meandering electrical trace can be correlated to length of the inductive trace which, in turn, can be correlated to strain experienced by the structural or functional layer.
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