公开(公告)号：US20190371964A1

公开(公告)日：2019-12-05

申请号：US16545919

申请日：2019-08-20

Applicant: Apple Inc.

Inventor： David P. Bour ,  Kelly McGroddy ,  Daniel Arthur Haeger ,  James Michael Perkins ,  Arpan Chakraborty ,  Jean-Jacques P. Drolet ,  Dmitry S. Sizov

IPC: H01L33/06 ,  H01L33/00 ,  H01L33/44 ,  H01L33/30 ,  H01L33/14 ,  H01L33/20

Abstract: LED structures are disclosed to reduce non-radiative sidewall recombination along sidewalls of vertical LEDs including p-n diode sidewalls that span a top current spreading layer, bottom current spreading layer, and active layer between the top current spreading layer and bottom current spreading layer.

公开(公告)号：US10395594B1

公开(公告)日：2019-08-27

申请号：US15247661

申请日：2016-08-25

Applicant: Apple Inc.

Inventor： Thomas Charisoulis ,  Tore Nauta ,  Kapil Sakariya ,  Jean-Jacques P. Drolet

IPC: G09G3/3241 ,  G09G3/20 ,  G09G3/3275 ,  G09G3/3258 ,  H01L29/786 ,  H01L27/12 ,  H01L27/32 ,  H01L25/16

Abstract: Methods, systems, and apparatuses for controlling an emission of the light emitting devices are described herein. The light emitting devices may be light emitting diode (LED) devices including μLED devices or organic LED (OLED) devices. Emission control of the LED may be performed using a micro-scale driving circuit (e.g., μDriver) containing drive transistors for constant current driving of the light emitting devices. One embodiment provides for a display driver hardware circuit including emission logic, the emission logic including comparator logic to compare a data voltage from a storage capacitor to a voltage ramp provided via the TFT backplane, the comparator logic to cause the emission logic to generate an emission pulse to an LED device, and wherein the integrated circuit is to switch and drive a plurality of LED devices. In one embodiment each of the plurality of LED devices is a subpixel for a display device.

公开(公告)号：US20180321432A1

公开(公告)日：2018-11-08

申请号：US15809891

申请日：2017-11-10

Applicant: Apple Inc.

Inventor： Jean-Jacques P. Drolet ,  Jonathan S. Steckel

IPC: G02B5/32 ,  G03H1/00 ,  H01L27/32

Abstract: A display may have an array of pixels. Each pixel may have a light-emitting diode such as an organic light-emitting diode or may be formed from other pixel structures such as liquid crystal display pixel structures. The pixels may emit light such as red, green, and blue light. An angle-of-view adjustment layer may overlap the array of pixels. During operation, light from the pixels passes through the angle-of-view adjustment layer to a user. The viewing angle for the user is enhanced as the angular spread of the emitted light from the pixels is enhanced by the angle-of-view adjustment layer. The angle-of-view adjustment layer may be formed from holographic structures recorded by applying laser beams to a photosensitive layer or may be formed from a metasurface that is created by patterning nanostructures on the display using printing, photolithography, or other patterning techniques.

公开(公告)号：US20170179339A1

公开(公告)日：2017-06-22

申请号：US15452294

申请日：2017-03-07

Applicant: Apple Inc.

Inventor： Jonathan S. Steckel ,  Sajjad A. Khan ,  Jean-Jacques P. Drolet

IPC: H01L33/04 ,  H01L33/60 ,  H01L33/58 ,  H01L33/28 ,  H01L33/56

Abstract: A display may be provided with light sources. The light sources may include light emitting diodes. The light sources may have packages formed from package bodies to which the light-emitting diodes are mounted. Layers such as quantum dot layers, light-scattering layers, spacer layers, and diffusion barrier layers may be formed over the package bodies and light-emitting diodes. Quantum dots of different colors may be stacked on top of each other. A getter may be incorporated into one or more of the layers to getter oxygen and water. Quantum dots may be formed from semiconductor layers that are doped with n-type and p-type dopant to adjust the locations of their conduction and valance bands and thereby enhanced quantum dot performance.

公开(公告)号：US20160197309A1

公开(公告)日：2016-07-07

申请号：US14881072

申请日：2015-10-12

Applicant: Apple Inc.

Inventor： Jean-Jacques P. Drolet

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

CPC classification number: H01L51/5281 ,  G02B27/286

Abstract: A display may have thin-film transistor circuitry on a substrate. An array of organic light-emitting diodes may be formed on the thin-film transistor circuitry. The organic light-emitting diodes may have anodes, cathodes, and emissive material located between the anodes and cathodes. A circular polarizer may be formed over the array of organic light-emitting diodes. The circular polarizer may include a linear polarizer and a quarter wave plate. The linear polarizer may be formed from one or more film layers having narrowband dichroic dyes so that the polarizer exhibits transmission peaks aligned with a selected subset of wavelengths and absorbance notches corresponding to the selected subset of wavelengths. The selected subset of wavelengths may cover the ranges where the light-emitting diodes are outputting light. Configured in this way, the polarizer will exhibit enhanced luminance at the desired wavelengths while suppressing ambient light reflections at other wavelengths in the visible spectrum.

Abstract translation: 显示器可以在衬底上具有薄膜晶体管电路。 可以在薄膜晶体管电路上形成有机发光二极管阵列。 有机发光二极管可以具有位于阳极和阴极之间的阳极，阴极和发光材料。 可以在有机发光二极管的阵列上形成圆偏振器。 圆偏振器可以包括线性偏振器和四分之一波片。 线性偏振器可以由具有窄带二色性染料的一个或多个膜层形成，使得偏振器表现出与所选择的波长子集和对应于所选择的波长子集的吸光度凹口对准的透射峰。 所选择的波长子集可以覆盖发光二极管输出光的范围。 以这种方式配置，偏振器将在期望的波长处显示增强的亮度，同时抑制在可见光谱中的其它波长处的环境光反射。

公开(公告)号：US20140035960A1

公开(公告)日：2014-02-06

申请号：US13665616

申请日：2012-10-31

Applicant: APPLE INC.

Inventor： Chenhua You ,  Jean-Jacques P. Drolet

IPC: G09G5/10 ,  G09G3/36

CPC classification number: G09G3/3413 ,  G09G2320/0242 ,  G09G2320/045 ,  G09G2320/064 ,  G09G2330/021

Abstract: Quantum dot backlights for use in displays and processes for controlling the dimming of quantum dot backlights are provided. The backlight can include an LED (e.g., a blue LED) configured to emit a light through a sheet of quantum dots. The quantum dots can be configured to emit colored light (e.g., red and green light) in response to the light emitted from the LED. To control the relative luminance of the LED, the backlight can be controlled through the use of current dimming to adjust the brightness of the LED at high relative luminance settings to increase the light output efficiency and can include the use of pulse width modulation to adjust the brightness of the LED at low relative luminance settings to reduce the amount of wavelength shift experienced by the LED.

Abstract translation: 提供了用于控制量子点背光调光的显示器和过程中的量子点背光。 背光源可以包括被配置为通过一束量子点发射光的LED（例如，蓝色LED）。 量子点可以被配置为响应于从LED发射的光而发出彩色光（例如，红色和绿色光）。 为了控制LED的相对亮度，可以通过使用电流调光来控制背光，以在高相对亮度设置下调节LED的亮度，以增加光输出效率，并且可以包括使用脉宽调制来调整 LED的亮度在相对亮度低的设置下可以减少LED发生的波长偏移量。