公开(公告)号：US10192938B2

公开(公告)日：2019-01-29

申请号：US15919057

申请日：2018-03-12

Applicant: Apple Inc.

Inventor： Cheng-Ho Yu ,  Chin-Wei Lin ,  Shyuan Yang ,  Ting-Kuo Chang ,  Tsung-Ting Tsai ,  Warren S. Rieutort-Louis ,  Shih-Chang Chang ,  Yu Cheng Chen ,  John Z. Zhong

IPC: H01L27/32 ,  G09G3/3233 ,  G09G3/3266 ,  G06F3/044

Abstract: A display may have an array of pixels. Display driver circuitry may supply data and control signals to the pixels. Each pixel may have seven transistors, a capacitor, and a light-emitting diode such as an organic light-emitting diode. The seven transistors may receive control signals using horizontal control lines. Each pixel may have first and second emission enable transistors that are coupled in series with a drive transistor and the light-emitting diode of that pixel. The first and second emission enable transistors may be coupled to a common control line or may be separately controlled so that on-bias stress can be effectively applied to the drive transistor. The display driver circuitry may have gate driver circuits that provide different gate line signals to different rows of pixels within the display. Different rows may also have different gate driver strengths and different supplemental gate line loading structures.

公开(公告)号：US10121430B2

公开(公告)日：2018-11-06

申请号：US14942068

申请日：2015-11-16

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Jungbae Kim ,  Kyung Wook Kim ,  MinKyu Kim ,  Shih Chang Chang ,  Vasudha Gupta ,  Young Bae Park

IPC: G09G3/36 ,  G09G3/3233 ,  G02F1/1368 ,  G02F1/1362 ,  G02F1/1343

Abstract: A display may have an array of light-emitting diode pixels or pixels containing portions of a liquid crystal layer to which electric fields are applied using electrodes. A pixel with a light-emitting diode may have a drive transistor coupled in series with the light-emitting diode. A storage capacitor may be coupled to a gate of the drive transistor. A pixel with a liquid crystal portion may have a storage capacitor coupled to a given one of the electrodes in that pixel. Switching circuitry in each pixel may be used to load data from a data line into the storage capacitor of the pixel. The switching circuitry may include a semiconducting-oxide transistor coupled to an associated data line and a series-connected silicon transistor that is coupled to the storage capacitor.

公开(公告)号：US10115339B2

公开(公告)日：2018-10-30

申请号：US14850111

申请日：2015-09-10

Applicant: Apple Inc.

Inventor： Vasudha Gupta ,  Chin-Wei Lin ,  Tsung-Ting Tsai

IPC: G09G3/32 ,  G09G3/3233 ,  G09G3/3208 ,  G09G3/3225 ,  G09G3/3266

Abstract: Display driver circuitry may load data into an array of pixels via data lines. The display driver circuitry may supply control signals including scan signals to the pixels via control lines. Each pixel may have transistors and capacitor circuitry for controlling the emission of light from a light-emitting diode. A drive transistor may be coupled in series with the light-emitting diode to control the amount of current flowing through the light-emitting diode. The drive transistor may have a drive transistor gate terminal that is coupled to one of the source-drain terminals of a switching transistor. The switching transistor may have a switching transistor gate terminal that receives the scan signal. When transitioning prior to an emission phase of operation, the scan signal may have a two-step transition profile or other shape that enhances display performance by reducing dynamic effects in the switching transistor.

公开(公告)号：US10032841B2

公开(公告)日：2018-07-24

申请号：US15351266

申请日：2016-11-14

Applicant: Apple Inc.

Inventor： Tsung-Ting Tsai ,  Vasudha Gupta ,  Chin-Wei Lin

IPC: H01L27/32 ,  H01L29/786 ,  H01L51/00 ,  H01L27/12

CPC classification number: H01L27/3262 ,  H01L27/1225 ,  H01L27/1251 ,  H01L27/1255 ,  H01L27/3258 ,  H01L27/3265 ,  H01L27/3276 ,  H01L29/78651 ,  H01L29/78672 ,  H01L29/7869 ,  H01L51/0097 ,  H01L2251/5338 ,  Y02E10/549

Abstract: An electronic device display may have an array of pixel circuits. Each pixel circuit may include an organic light-emitting diode and a drive transistor. Each drive transistor may be adjusted to control how much current flows through the organic light-emitting diode. Each pixel circuit may include one or more additional transistors such as switching transistors and a storage capacitor. Semiconducting oxide transistors and silicon transistors may be used in forming the transistors of the pixel circuits. The storage capacitors and the transistors may be formed using metal layers, semiconductor structures, and dielectric layers. Some of the layers may be removed along the edge of the display to facilitate bending. The dielectric layers may have a stepped profile that allows data lines in the array to be stepped down towards the surface of the substrate as the data lines extend into an inactive edge region.

公开(公告)号：US09940866B2

公开(公告)日：2018-04-10

申请号：US14978988

申请日：2015-12-22

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Zhen Zhang ,  Shih Chang Chang ,  Sang Ha Kim

IPC: G09G3/20 ,  G02F1/1345 ,  G09G3/36

CPC classification number: G09G3/2092 ,  G02F1/1345 ,  G02F2201/56 ,  G09G3/20 ,  G09G3/3666 ,  G09G2300/0426 ,  G09G2300/0439 ,  G09G2300/08 ,  G09G2310/0221 ,  G09G2310/0264 ,  G09G2310/0281 ,  G09G2310/0286

Abstract: A display may have an array of pixels. The array of pixels may have a shape such as a circular shape or other shape with a curved edge. Display driver circuitry may supply data signals to the pixels using folded vertical data lines and bisected horizontal gate lines. Each folded vertical lines may have a first segment in a left half of the array and a second segment in a right half of the display. Curved coupling segments in an inactive area of the display may be used in joining the first and second segments. Display driver circuits may be provided in top and bottom portions of the inactive area to supply data to respective top and bottom portions of the array. Gate driver output buffers may have different strengths in different rows of the array.

公开(公告)号：US20180075801A1

公开(公告)日：2018-03-15

申请号：US15404139

申请日：2017-01-11

Applicant: Apple Inc.

Inventor： Chengrui LE ,  Chaohao Wang ,  Kingsuk Brahma ,  Jie Won Ryu ,  Chin-Wei Lin ,  Rui Zhang

IPC: G09G3/3233 ,  G09G3/3258

Abstract: Aspects of the subject technology relate to electronic devices with displays. A display may include an array of display pixels each having a drive transistor and an organic light-emitting diode. A pulse-width-modulated current may be provided to the organic light-emitting diode during each display frame to compensate for an on-bias compensation applied to the drive transistor between display frames. The pulse-width-modulated current may be provided with a pulse-width-modulation ratio that decreases over the course of each display frame. The decrease of the pulse-width-modulation ratio for each display frame may be determined based on a peak luminance for that display frame. The reduction in flicker provided by the pulse-width-modulated current may facilitate operation of the display with a reduced refresh rate, thereby reducing power consumption by the display.

公开(公告)号：US20170365214A1

公开(公告)日：2017-12-21

申请号：US15431337

申请日：2017-02-13

Applicant: Apple Inc.

Inventor： Tsung-Ting Tsai ,  Shinya Ono ,  Chin-Wei Lin ,  Ting-Kuo Chang

IPC: G09G3/3233 ,  H01L51/52 ,  G09G3/3266 ,  H01L27/32

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/08 ,  G09G2320/041 ,  G09G2320/045 ,  H01L27/3279

Abstract: An organic light-emitting diode display may contain an array of display pixels. Each display pixel may have a respective organic light-emitting diode that is controlled by a drive transistor. At low temperatures, it may be necessary to increase the amount of current through an organic light-emitting diode to achieve a desired luminance level. In order to increase the current through the light-emitting diode, the ground voltage level may be lowered. However, this may lead to thin-film transistors within the pixel leaking, which may result in undesirable display artifacts such as bright dots being displayed in a dark image. In order to prevent leakage in the transistors, the transistors may be coupled to separate reference voltage supplies or separate control lines. Additionally, the transistors may be positioned to minimize leakage even at low ground voltage levels.

公开(公告)号：US20170263173A1

公开(公告)日：2017-09-14

申请号：US15179896

申请日：2016-06-10

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Chin-Wei Lin ,  Hyunwoo Nho

IPC: G09G3/20

CPC classification number: G09G3/2003 ,  G09G3/2092 ,  G09G3/3233 ,  G09G2310/0235 ,  G09G2320/0626 ,  G09G2320/0666 ,  G09G2330/021 ,  G09G2330/025 ,  G09G2330/028 ,  H04N5/2256

Abstract: Driving methods and display systems are described for operating a display panel in flash mode. In an embodiment, the driving method includes time multiplexing between at least two panel operation voltage (VOP) levels including a first VOP level and a second VOP level across all Vdd input lines to a display area, and emitting a first wavelength range from a first subpixel group during application of the first VOP level across all of the Vdd input lines and emitting a second wavelength range from a second subpixel group during application of the second VOP level across all of the Vdd input lines.

公开(公告)号：US09679956B2

公开(公告)日：2017-06-13

申请号：US15150285

申请日：2016-05-09

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Shih Chang Chang ,  Ching-Sang Chuang

IPC: H01L27/32 ,  H01L23/552 ,  H01L27/12 ,  H01L29/786

Abstract: A display may have an array of organic light-emitting diode display pixels. Each display pixel may have a light-emitting diode that emits light under control of a drive transistor. Each display pixel may also have control transistors for compensating and programming operations. The array of display pixels may have rows and columns. Row lines may be used to apply row control signals to rows of the display pixels. Column lines (data lines) may be used to apply display data and other signals to respective columns of display pixels. A bottom conductive shielding structure may be formed below each drive transistor. The bottom conductive shielding structure may serve to shield the drive transistor from any electric field generated from the adjacent row and column lines. The bottom conductive shielding structure may be electrically floating or coupled to a power supply line.

公开(公告)号：US09601517B2

公开(公告)日：2017-03-21

申请号：US14504261

申请日：2014-10-01

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Shih Chang Chang ,  Vasudha Gupta

IPC: H01L27/12 ,  H01L27/32 ,  H01L27/15 ,  G09G3/32

CPC classification number: H01L27/1225 ,  G09G3/32 ,  G09G2300/0426 ,  G09G2300/0842 ,  G09G2300/0861 ,  H01L27/1222 ,  H01L27/124 ,  H01L27/156 ,  H01L27/3255

Abstract: An electronic device may include a display. The display may be formed by an array of light-emitting diodes mounted to the surface of a substrate. The light-emitting diodes may be inorganic light-emitting diodes formed from separate crystalline semiconductor structures. An array of pixel control circuits may be used to control light emission from the light-emitting diodes. Each pixel control circuit may be used to supply drive signals to a respective set of the light-emitting diodes. The pixel control circuits may each have a silicon integrated circuit that includes transistors such as emission enable transistors and drive transistors for supplying the drive signals and may each have thin-film semiconducting oxide transistors that are coupled to the integrated circuit and that serve as switching transistors.