公开(公告)号：US11280907B2

公开(公告)日：2022-03-22

申请号：US16235338

申请日：2018-12-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jeffrey Matthew Kempf ,  Vikrant R. Bhakta ,  Jeffrey Scott Farris

IPC: G01S17/89 ,  G01S17/42 ,  G02B27/28 ,  G02B5/28 ,  H04N13/254 ,  H04N13/218

Abstract: A depth imaging system includes an optical image sensor, an optical beam steering system, an object identification system, and a depth measurement system. The object identification system is coupled to the optical image sensor. The object identification system is configured to identify an object in an image captured by the optical image sensor. The depth measurement system is coupled to the optical beam steering device. The depth measurement system is configured to, responsive to identification of the object by the object identification system: direct an optical signal, via the optical beam steering device, to the object, and to determine a distance to the object based on a time-of-flight of the optical signal.

公开(公告)号：US20240201376A1

公开(公告)日：2024-06-20

申请号：US18589693

申请日：2024-02-28

Applicant: Texas Instruments Incorporated

Inventor： Terry A. Bartlett ,  Nirmal C. Warke ,  David P. Magee ,  Jeffrey Scott Farris ,  Patrick Oden

IPC: G01S17/26 ,  G01S7/481 ,  G01S7/484

CPC classification number: G01S17/26 ,  G01S7/4814 ,  G01S7/4816 ,  G01S7/4817 ,  G01S7/484

Abstract: In described examples, a method includes receiving light from a field of view on a spatial light modulator that includes a two-dimensional array of picture elements in rows and columns; and determining a portion of the two-dimensional array that corresponds to a region of interest in response to a transmit scan beam illuminating the field of view. The method also includes directing light from the portion of the two-dimensional array to a photodiode, and directing light outside the portion away from the photodiode.

公开(公告)号：US20190017671A1

公开(公告)日：2019-01-17

申请号：US16119933

申请日：2018-08-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vikrant R. Bhakta ,  Jeffrey Scott Farris

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

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：US09907135B2

公开(公告)日：2018-02-27

申请号：US15410907

申请日：2017-01-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jeffrey Scott Farris ,  Michael David McCormick ,  Jason Ryan Thompson

IPC: H05B37/02 ,  H05B33/08 ,  G02B27/01 ,  H02J7/00

CPC classification number: H05B33/086 ,  G02B27/01 ,  G02B27/0101 ,  G02B2027/0112 ,  G02B2027/0118 ,  H02J7/0068 ,  H02J7/007 ,  H05B33/0818 ,  H05B33/0827 ,  H05B33/089 ,  H05B37/0218 ,  Y10T307/625

Abstract: For controlling a level of luminance produced by a color light-emitting diode (LED) array, a method includes: for a predetermined flux bit-slice period, activating a color enable signal to select a primary color LED and to select a predetermined light flux magnitude set-point; selectively charging an energy storage device and discharging the energy storage device through the selected primary color LED to generate a light flux output during the flux bit-slice period; adjusting a rate of selectively charging the energy storage device to maintain a magnitude of the light flux output at the predetermined light flux magnitude set-point during the flux bit-slice period; and adjusting the predetermined light flux magnitude set-point over the life of the selected LED as the selected LED ages as a function of an anode-to-cathode voltage drop across the selected LED for a given magnitude of current flowing through the selected LED.

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：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：US10426010B2

公开(公告)日：2019-09-24

申请号：US15859110

申请日：2017-12-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： John Peter Fenske ,  Muhammad Roshanali Rajabali ,  Jeffrey Scott Farris

IPC: H05B33/08 ,  H04N9/31

Abstract: In described examples, a circuit for controlling a light emitting diode (LED) includes a first flip flop including first and second control inputs. In response to assertion of a first control signal, the first flip flop generates a second control signal to control a first switch coupled in parallel with the LED. An edge detect circuit is coupled to an output of the first flip flop. In response to generation of the second control signal, the edge detect circuit generates a third control signal. A second flip flop includes third and fourth control inputs. The third control input is coupled to an output of the edge detect circuit. The second flip flop generates a fourth control signal to control a second switch coupled, via an inductor, to the first switch and the LED.

公开(公告)号：US10368412B2

公开(公告)日：2019-07-30

申请号：US15859081

申请日：2017-12-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： John Peter Fenske ,  Muhammad Roshanali Rajabali ,  Jeffrey Scott Farris

IPC: H05B33/08 ,  H04N9/31

Abstract: In described examples, a circuit for controlling a light emitting diode (LED) includes a switch control circuit to generate a first control signal for a first switch coupled in parallel with the LED. The switch control circuit generates the first control signal responsive to a magnitude of loop current through the first switch relative to a first reference signal. A switch driver generates a second control signal for a second switch coupled to the first switch via an inductor. The first switch driver generates the second control signal responsive to the magnitude of the loop current through the first switch relative to the first reference signal.

公开(公告)号：US20170357000A1

公开(公告)日：2017-12-14

申请号：US15619048

申请日：2017-06-09

Applicant: Texas Instruments Incorporated

Inventor： Terry A. Bartlett ,  Nirmal C. Warke ,  David P. Magee ,  Jeffrey Scott Farris ,  Patrick Ian Oden

IPC: G01S17/10 ,  G01S7/484

CPC classification number: G01S17/102 ,  G01S7/4814 ,  G01S7/4816 ,  G01S7/4817 ,  G01S7/484

Abstract: In described examples, a spatial light modulator (SLM) receives light from a field of view. The SLM includes a two-dimensional array of picture elements in rows and columns. In response to a transmit scan beam that illuminates the field of view, a portion of the two-dimensional array is impacted by light reflected from a region of interest. The portion of the two-dimensional array is determined. Light is directed from the portion of the two-dimensional array to a photodiode. Light that impacts the two-dimensional array outside the portion is directed away from the photodiode.