公开(公告)号：US20180031202A1

公开(公告)日：2018-02-01

申请号：US15659600

申请日：2017-07-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vikrant R. Bhakta

IPC: F21S8/10 ,  B60Q1/14 ,  B60Q1/076

CPC classification number: F21S41/675 ,  B60Q1/076 ,  B60Q1/12 ,  B60Q1/14 ,  B60Q2300/45 ,  F21S41/141 ,  F21S41/25 ,  F21S41/36

Abstract: In described examples, a DMD includes micromirrors. A first light source generates a first beam profile illuminating a first set of micromirrors of the DMD. A second light source generates a second beam profile illuminating a second set of micromirrors of the DMD. The first and second beam profiles partially overlap on at least some micromirrors of the DMD. The first light source is source-modulated independently of the second light source for adjusting power and brightness in response to a sensed driving condition. The micromirrors of the DMD are modulated in response to the sensed driving condition.

公开(公告)号：US20210254807A1

公开(公告)日：2021-08-19

申请号：US17224729

申请日：2021-04-07

Applicant: Texas Instruments Incorporated

Inventor： Vikrant R. Bhakta ,  Jeffrey Scott Farris

IPC: F21S41/25 ,  F21S41/675 ,  F21S41/153

Abstract: An automotive headlamp is provided that includes a digital micromirror device (DMD) headlight module, the DMD headlight module including a DMD, a white light module to provide a white light beam to illuminate the DMD, illumination optics optically coupled between the DMD and the white light module to prepare the white light beam for illuminating the DMD, and projection optics optically coupled to the DMD to receive pixelated light reflected by the DMD and project a pixelated light beam on road, in which at least one of the DMD, the white light module, and the illumination optics shape a beam profile of the white light beam such that the light reflected by the DMD has a pixelated non-uniform beam profile suitable for projecting a white light beam that forms a portion of a white light beam of the headlamp.

公开(公告)号：US10995925B2

公开(公告)日：2021-05-04

申请号：US16119933

申请日：2018-08-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vikrant R. Bhakta ,  Jeffrey Scott Farris

IPC: F21S41/25 ,  F21S41/675 ,  F21S41/153

Abstract: To generate a projected light beam, a headlamp includes: a light source to provide light; and a digital micromirror device (DMD). Illumination optics are optically coupled between the light source and the DMD to illuminate the DMD with the light from the light source. The DMD is arranged to reflect the light as pixelated light. Projection optics are optically coupled to the DMD to project the pixelated light as a mid-beam portion of the projected light beam. The mid-beam portion has a non-uniform mid-range beam profile shaped by at least the DMD and the illumination optics. A field of view and an intensity of the projected light beam are controllable by the light source and the DMD. Also, the headlamp includes a high beam module to provide a high beam portion of the projected light beam.

公开(公告)号：US10798350B2

公开(公告)日：2020-10-06

申请号：US16050697

申请日：2018-07-31

Applicant: Texas Instruments Incorporated

Inventor： Vikrant R. Bhakta ,  Jeffrey Matthew Kempf

IPC: H04N9/31 ,  H04N5/74 ,  H04N5/225

Abstract: Described examples include an optical apparatus having a first lens, a first optical element having a first aperture, a second lens, and a second optical element having a second aperture. The optical apparatus includes a third lens having a first portion to receive projected light from the first lens through the first aperture and to project the projected light onto a target. Also, the third lens has a second portion to receive reflected light reflected from the target and to provide the reflected light to the second lens through the second aperture.

公开(公告)号：US10458612B2

公开(公告)日：2019-10-29

申请号：US15850698

申请日：2017-12-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vikrant R. Bhakta

IPC: F21S41/16 ,  F21S41/14 ,  F21S41/147 ,  F21S41/143 ,  F21S41/64 ,  F21S41/675 ,  G03B21/20 ,  H01S5/00 ,  F21S41/33 ,  F21S41/36 ,  F21S41/32 ,  F21S41/30 ,  F21S41/173 ,  F21S41/265 ,  F21S41/255 ,  F21S41/176

Abstract: An illumination apparatus is provided that includes a yellow phosphor converter to receive a blue laser light beam and to convert a portion of the blue laser light beam to yellow light, a dichroic mirror optically coupled to the yellow phosphor converter to receive the phosphor-emitted light beam and to filter the phosphor-emitted light beam to provide a dichroic-filtered light beam, the dichroic mirror configured to pass yellow light and to reflect at least some blue light, and a blue light source optically coupled to the dichroic mirror to provide a blue light beam, the dichroic mirror configured to reflect the blue light beam in a same direction as the dichroic-filtered light beam.

公开(公告)号：US20190166348A1

公开(公告)日：2019-05-30

申请号：US15826181

申请日：2017-11-29

Applicant: Texas Instruments Incorporated

Inventor： Jeffrey Matthew Kempf ,  Vikrant R. Bhakta

IPC: H04N13/00 ,  G02B26/08 ,  H04N13/02 ,  H04N5/225 ,  G06T7/521

Abstract: Described examples include an imager includes a light source; a spatial light modulator to receive light from the light source and to provide patterned light to illuminate an object; a sensor to receive a first and an offset reflected light from reflection of the patterned light off an object; and a processor to receive sensed images of the first reflected light and the offset reflected light and apply a deconvolution to a combined image including a combination of the sensed images of the first reflected light and the offset reflected light to generate the combined image having pixel density greater than the sensed images of the first reflected light and the offset reflected light, wherein the processor is configured to determine a position of at least one point on the object by triangulation between the spatial light modulator and the sensor using the patterned light and the combined image.

公开(公告)号：US10066799B2

公开(公告)日：2018-09-04

申请号：US14752825

申请日：2015-06-26

Applicant: Texas Instruments Incorporated

Inventor： Vikrant R. Bhakta ,  Jeffrey Scott Farris

IPC: F21S41/25 ,  F21S41/675 ,  F21S41/141 ,  F21S8/10

Abstract: An automotive headlamp is provided that includes a digital micromirror device (DMD) headlight module, the DMD headlight module including a DMD, a white light module to provide a white light beam to illuminate the DMD, illumination optics optically coupled between the DMD and the white light module to prepare the white light beam for illuminating the DMD, and projection optics optically coupled to the DMD to receive pixelated light reflected by the DMD and project a pixelated light beam on road, in which at least one of the DMD, the white light module, and the illumination optics shape a beam profile of the white light beam such that the light reflected by the DMD has a pixelated non-uniform beam profile suitable for projecting a white light beam that forms a portion of a white light beam of the headlamp.

公开(公告)号：US20170122515A1

公开(公告)日：2017-05-04

申请号：US14925328

申请日：2015-10-28

Applicant: Texas Instruments Incorporated

Inventor： Vikrant R. Bhakta

IPC: F21S8/10

CPC classification number: F21S41/14 ,  F21S41/125 ,  F21S41/13 ,  F21S41/16 ,  F21S41/285 ,  F21S41/321 ,  F21S41/37 ,  F21S41/43 ,  F21S45/70

Abstract: Intrinsically safe laser sourced illumination. A system for illumination is disclosed, including a plurality of laser illumination sources configured to transmit laser beams; a dichroic mirror spaced from the plurality of laser illumination sources and having an aperture configured to allow the laser beams to pass through the dichroic mirror, the remaining surfaces of the dichroic mirror configured to reflect the laser beams; a phosphor element spaced from the dichroic mirror and coated with a substance to fluoresce when struck by the laser beams and configured to disperse the laser beams and to output combined light that includes fluorescent light and the dispersed laser beams; and an illumination output arranged to receive the combined light from the phosphor element and to output illuminating light containing both the fluorescent light and the dispersed laser beams. Methods are also disclosed.

公开(公告)号：US20160347237A1

公开(公告)日：2016-12-01

申请号：US15144170

申请日：2016-05-02

Applicant: Texas Instruments Incorporated

Inventor： Vikrant R. Bhakta ,  Alexander Lyubarsky

IPC: B60Q1/14 ,  F21S8/10

CPC classification number: F21S41/675 ,  B60Q2400/50 ,  F21S41/255 ,  F21S41/265 ,  F21S41/285 ,  F21S41/645

Abstract: In described examples of a headlamp to project a beam of light from a lens, the headlamp includes: an illumination module to output a light beam to an illumination path; and illumination optics to receive the light beam and to provide illumination to a programmable spatial light modulator. The programmable spatial light modulator is arranged to receive the illumination and to output non-uniform illumination as patterned light to projection optics. The projection optics are arranged to receive the patterned light and to output the patterned light through the lens. At least one of the illumination optics and the projection optics includes an anamorphic lens to shape the light beam.

Abstract translation: 在用于投射来自透镜的光束的头灯的所述示例中，前照灯包括：照明模块，用于将光束输出到照明路径; 以及照明光学器件以接收光束并向可编程空间光调制器提供照明。 可编程空间光调制器被布置成接收照明并且将非均匀照明作为图案化的光输出到投影光学器件。 投影光学器件被布置成接收图案化的光并且通过透镜输出图案化的光。 照明光学元件和投影光学元件中的至少一个包括成形光束的变形透镜。

公开(公告)号：US20160191869A1

公开(公告)日：2016-06-30

申请号：US14583764

申请日：2014-12-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vikrant R. Bhakta

IPC: H04N9/31 ,  G02B27/09 ,  G02B19/00 ,  G02B26/08 ,  G02B26/00 ,  G02B27/14 ,  G02B5/18 ,  F21V8/00 ,  G02B27/30

CPC classification number: H04N9/3111 ,  G02B6/0096 ,  G02B26/008 ,  G02B27/0927 ,  G02B27/0994 ,  G02B27/4244 ,  G03B21/208 ,  H04N9/3158

Abstract: A Gaussian-distributed excitation light beam of an excitation spectrum emitted from an excitation light source enters a light pipe and is there converted to a top-hat spatially distributed excitation beam. The top-hat distributed excitation beam is focused on a phosphor-coated or reflective portion of a surface of an optical wavelength conversion element. Fluoresced and reflected beams travel outward from the wavelength conversion element and re-enter the light pipe to be homogenized during transit through the light pipe. A homogenized fluoresced or reflected beam is relayed to an output as one of a sequence of colors of homogenized light. The functions of Gaussian to top-hat conversion of the excitation beams directed toward the optical conversion element and homogenization of beams directed outward from the optical conversion element are both efficiently performed using a single, shared light pipe.

Abstract translation: 从激发光源发射的激发光谱的高斯分布激发光束进入光管，并转换成顶帽空间分布的激发光束。 顶帽分布式激发光束聚焦在光波长转换元件的表面的磷光体涂覆或反射部分上。 荧光和反射光束从波长转换元件向外移动，并在透过光管的过程中重新进入光管以使其均匀化。 均匀化的荧光或反射光束被中继到输出作为均匀光的一系列颜色之一。 使用单个共用的光管来有效地执行高斯到朝向光转换元件的激发光束的顶帽转换和从光转换元件向外指向的光束的均匀化的功能。