公开(公告)号：US09781784B2

公开(公告)日：2017-10-03

申请号：US14533763

申请日：2014-11-05

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Bharath Patil ,  Jagannathan Venkataraman

IPC: G05F1/00 ,  H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  H05B33/08 ,  H05B41/392 ,  H02M3/156

CPC classification number: H05B33/0815 ,  G09G2320/064 ,  H02M3/156 ,  H05B33/0818 ,  H05B33/0845 ,  H05B33/0851 ,  H05B37/02 ,  H05B41/3927 ,  Y02B20/346 ,  Y02B20/347 ,  Y10S362/80

Abstract: In an embodiment, method of controlling an illumination device by an output signal of a DC-DC converter is disclosed. The output signal is controlled by a PWM signal. The method includes receiving a feedback signal corresponding to variation in the output signal with respect to a pre-determined output signal, and determining a target duty cycle of the PWM signal based on the feedback signal. The PWM signal of the target duty cycle is capable of enabling the DC-DC converter to generate the pre-determined output signal. The method includes providing the PWM signal of an effective duty cycle equal to the target duty cycle over N switching pulses of the PWM signal to the DC-DC converter. The method provides the PWM signal by providing M switching pulses of a first PWM signal of a first duty cycle, and N−M switching pulses of a second PWM signal of a second duty cycle.

公开(公告)号：US20150078001A1

公开(公告)日：2015-03-19

申请号：US14486057

申请日：2014-09-15

Applicant: Texas Instruments Incorporated

Inventor： Bharath Patil ,  Karthik Rajagopal ,  Subhash Chandra Venkata Sadhu

IPC: G02B27/48

CPC classification number: G02B27/48

Abstract: Laser speckle reduction using a passive diffuser. A diffuser for reducing laser speckle is disclosed comprising a diffuser having a colloid configured for placement in a light path of a coherent light source. The colloid exhibits Brownian motion. The diffuser can be formed of transparent plates containing the colloid. In a system for illumination, a coherent source of light outputting a light beam along a light path is provided; and a diffuser for reducing laser speckle effects is placed in the light path, the diffuser comprising a colloid disposed in a container that is transparent to the light beam output by the coherent source. A method includes illuminating a photosensitive sensor, comprising transmitting a coherent light from a light source through a diffuser comprising a colloid and directing the light from the diffuser onto the photosensitive sensor. Additional embodiments are disclosed.

Abstract translation: 使用无源漫射器进行激光散斑减光。 公开了一种用于减少激光散斑的漫射器，其包括具有配置用于放置在相干光源的光路中的胶体的扩散器。 胶体呈现布朗运动。 扩散器可以由含有胶体的透明板形成。 在照明系统中，提供沿光路输出光束的相干光源; 并且用于减少激光散斑效应的扩散器被放置在光路中，扩散器包括设置在由相干光源输出的光束透明的容器中的胶体。 一种方法包括照射光敏传感器，包括从光源通过包括胶体的扩散器传输相干光并将来自扩散器的光引导到感光传感器上。 公开了另外的实施例。

公开(公告)号：US20150074306A1

公开(公告)日：2015-03-12

申请号：US14482474

申请日：2014-09-10

Applicant: Texas Instruments Incorporated

Inventor： Ravishankar S. Ayyagari ,  Supreet Joshi ,  Bharath Patil ,  Madhav Tejaswi Boddhapu

IPC: G06F13/362 ,  G06F13/38

CPC classification number: G06F13/4295 ,  G06F13/4072

Abstract: In a single wire communications interface embodiment, a single wire is coupled between a master device and at least one slave device, the master device configured for transmitting data words as serial data to and for receiving data words as serial data from the at least one slave device, and the at least one slave device configured for transmitting data words as serial data to and receiving data words as serial data from the master device; wherein prior to transmission of any data word on the single wire by one of the master device and the slave device, a sync pulse is first transmitted on the single wire. Integrated circuit embodiments for implementing the single wire communications interface, and method embodiments incorporating the single wire communications interface are disclosed. Additional embodiments are disclosed.

Abstract translation: 在单线通信接口实施例中，单线耦合在主设备和至少一个从设备之间，主设备被配置为将数据字作为串行数据发送到串行数据，并将数据字作为来自至少一个从站的串行数据接收 所述至少一个从设备被配置为将来自所述主设备的数据字作为串行数据发送到数据字并作为串行数据接收; 其中在通过主设备和从设备之一在单线上发送任何数据字之前，首先在单线上发送同步脉冲。 公开了用于实现单线通信接口的集成电路实施例以及并入单线通信接口的方法实施例。 公开了另外的实施例。