Daniel G Draper, 684708 Dover St, Chicago, IL 60640

7381935, Jun 3, 2008

Nov 19, 2004

10/993525

Gilberto I. Sada - Irvine CA, US
Maurice M. Reintjes - Beaverton OR, US
Keith R. Jones - Irvine CA, US
Daniel Draper - Portland OR, US

Mindspeed Technologies, Inc. - Newport Beach CA

G01J 1/32

250205, 250214 R

A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a default or target value from memory may be utilized to bias or otherwise control operation of an optic signal generator or driver. During operation, pre-stored values may continue to be utilized or an open loop or closed loop control system may be utilized. An open loop control system may incorporate a temperature module or a timer module to account for changes in environment or changes due to aging that may undesirably affect system operation. A closed loop control system may incorporate one or more feedback loops that generate a compensation value to account for detected changes. In one configuration one or more peak values of the actual optic signal, or a portion thereof, are detected and processed to generate the compensation signal.

7853154, Dec 14, 2010

Jan 12, 2007

11/653110

Quazi Ikram - Irvine CA, US
Cristiano Bazzani - Irvine CA, US
Daniel Draper - Portland OR, US
Maurice M. Reintjes - Beaverton OR, US

Mindspeed Technologies, Inc. - Newport Beach CA

H04B 10/04
H01S 3/00

398192, 398182, 372 3802, 372 3807

An optic signal transmit system and biasing method and apparatus and system is disclosed to reduce power consumption during non-transmit periods. An optic signal generator receives a bias signal and an outgoing signal. A burst/transmit enable signal enables the transmit system into transmit mode, such as during a transmit window in a time multiplexed environment such as PON networks. A bias circuit biases the driver and/or optic signal generator. To realize power savings, the bias circuit includes one or more stages which are selectively enabled to adequately bias the driver and optic signal generator during transmit windows but disabled during periods when the system is not transmitting. The bias circuit may comprise a current mirror with a reference device, a fixed device, and switched device, which is selectively included in the circuit by a bias switch. The bias switch is responsive to a burst/transmit enable signal or a signal related thereto.

8243211, Aug 14, 2012

Mar 30, 2009

12/384035

Cristiano Bazzani - Irvine CA, US
Daniel Draper - Portland OR, US

Mindspeed Technologies, Inc. - Newport Beach CA

H04N 5/64

348744, 348554, 353 85

A projection system with one or more light sources reduced power consumption and optional scanning capability is disclosed. A controller processes image data to generate light source control signals and pixel screen control signals which are coordinated to generate an image. Reductions in power consumption occur by matching the light output from the light source to the brightest pixel(s) in the pixel screen for a particular frame. By setting the light output level to an intensity or duration matched to only the maximum level corresponding to a image frame, power consumption is reduced as compared to an embodiment which sets the light source output to its maximum level or maximum duration. The pixel screen, which may be an LCD screen, sets pixel areas corresponding to the brightest pixels as transparent and other, less bring pixels on the pixel screen are set to appropriate levels of reduced transparency.

2009017, Jul 9, 2009

Jul 15, 2008

12/218623

Cristiano Bazzani - Irvine CA, US
Daniel Draper - Portland OR, US
Kevin B. McDonald - Portland OR, US

H01S 3/10

372 26

An optical signal generator is configured with an associated control system and driver configured to reduce speckle. Speckle reduction occurs by pulsing the drive signal between a first current level and a second current level. These pulses force the optical signal generator to introduce oscillations into the optical signal. The coherence of the emitted light is reduced during the period of oscillations in the optical signal, which reduces speckle. In one embodiment, the pulsing of the drive signal brings the drive signal down to a level near or below threshold, which in turn intermittently turns off the optical signal output. Returning the optical signal to a desired optical output intensity introduces the speckle reducing oscillation. The pulse frequency, and duty cycle is controlled by a duty cycle control signal to modulate overall optical power and adjust amount of despeckle.