Hung L Dang

7080940, Jul 25, 2006

May 5, 2004

10/839876

John P. Gotthold - Sunnyvale CA, US
Terry M. Stapleton - San Jose CA, US
Robert Champetier - Depoe Bay OR, US
Hung Dang - San Jose CA, US

Luxtron Corporation - Santa Clara CA

G01J 5/08
G01J 5/28
G01K 1/14
G01K 11/20
F21V 8/00
G02B 6/00

374161, 374 131, 374208, 374121, 385 12, 385147, 2504581, 2504591, 250 234, 2505781

A temperature sensor that has a thermally conducting contact with a surface that emits electromagnetic radiation in proportion to the temperature of the contact is disclosed. The sensor has a resilient member attached to the contact and configured to extend the contact toward the object to be measured. A first light waveguide is attached to the contact and is configured to transmit the electromagnetic radiation from the contact. The sensor has a guide with a bore formed therein that the first waveguide is insertable into. When the contact is moved, the first waveguide moves within the bore. A second waveguide is attached to the guide such that a variable gap is formed between the ends of the first waveguide and the second waveguide. Electromagnetic energy from the first waveguide traverses the gap and can be transmitted by the second waveguide. The guide allows the first waveguide to move with the contact in order to ensure that the contact is fully engaged with the surface of the object.

7374335, May 20, 2008

Feb 24, 2006

11/361543

John P. Gotthold - Sunnyvale CA, US
Terry M. Stapleton - San Jose CA, US
Robert Champetier - Depoe Bay OR, US
Hung Dang - San Jose CA, US

Luxtron Corporation - Santa Clara CA

G01K 11/12
G01K 11/20
G01K 11/32
G01J 5/08

374161, 374141, 374131

A luminescent temperature sensor comprising (i) an object having a recess, (ii) a layer of luminescent material disposed in the recess, wherein the luminescent material emits electromagnetic radiation having a detectable optical characteristic that is functionally dependent on the temperature of the object, and (iii) a light waveguide in optical communication with the layer of luminescent material, is provided. A test device for measuring a temperature in a processing step comprising (i) an object having a surface and having a recess in the surface of the object, (ii) a layer of luminescent material disposed in the recess, wherein the luminescent material emits electromagnetic radiation having a detectable optical characteristic that is functionally dependent on the temperature of the object in response to a source of excitation radiation, and (iii) an optical window that seals said layer of luminescent material in the recess in the surface of the object, is provided.

7583571, Sep 1, 2009

Nov 14, 2005

11/273518

Ainobu Yoshimoto - Milpitas CA, US
Hung Phi Dang - Santa Clara CA, US

LSI Corporation - Milpitas CA

G11B 7/00

369 475, 369 591, 369116

An apparatus comprising a first circuit, a second circuit and a third circuit. The first circuit may be configured to (i) generate a read power signal and (ii) control power of a laser beam emitted from an optical pick-up circuit during a read process. The second circuit may be configured to (i) generate a first write power signal and (ii) control one or more power levels of the laser beam during a write process in response to a second write power signal. The third circuit may be configured to generate the second write power signal and a third write power signal in response to a target write signal.

7633840, Dec 15, 2009

Jun 9, 2006

11/450846

Ainobu Yoshimoto - Milpitas CA, US
Hung Phi Dang - Santa Clara CA, US

LSI Corporation - Milpitas CA

G11B 7/00

369 4429

An apparatus comprising a focus controller, a photo-diode sensor, a data circuit, a focus error creation circuit and a focus offset circuit. The focus controller may be configured to control a lens in relation to a laser beam and allow the laser beam to focus on a disc. The photo-diode sensor may be configured to generate one or more photo-diode signals in response to the laser beam. The data circuit may be configured to generate one or more disc status signals in response to the one or more photo-diode signals. The focus error creation circuit may generate a focus error signal. The focus error signal may provide a first value based on a focus point of the laser beam. The focus offset circuit may be configured to offset the first value of the focus error signal to a second value in response to the disc status signals to allow the focus controller to move the lens to a position which will increase the focus point of the laser beam on the disc.

7636377, Dec 22, 2009

Mar 25, 2005

11/090528

Yuanping Zhao - San Jose CA, US
Hung P. Dang - Santa Clara CA, US

LSI Corporation - Milpitas CA

H01S 3/00

372 3807, 372 381, 372 3802, 372 3801

The present invention is directed to an optical disc recorder laser power control apparatus utilizing two different current sources to solve the problem caused by the contradiction between control resolution and control range. The first current source and the second current source are connected in parallel to a single control output pin. The first current source and the second current source may work independently from each other. The laser driver controls emission power of one of the laser diodes with a driving current supplied from the single control output pin coupled to both the first current source and the second current source. Advantageously, the fine laser power control pitch from the first current source contributes to fine control resolution, while the coarse laser power control from the second current source provides a wide control range for various kinds of laser diodes.

7920446, Apr 5, 2011

Dec 7, 2009

12/632046

Ainobu Yoshimoto - Milpitas CA, US
Hung Phi Dang - Santa Clara CA, US

LSI Corporation - Milpitas CA

G11B 7/00

369 4429

An apparatus includes a first circuit and a second circuit. The first circuit may be configured to generate status signals and an error signal in response to accessing a storage medium. The error signal provides a first value based on an accuracy of accessing the storage medium. The second circuit may be configured to offset the first value of the error signal to a second value to increase the accuracy of accessing said storage medium. The status signals include one or more of a data signal and a differential signal. In a first mode, an offset signal is generated in response to the data signal. In a second mode, the offset signal is generated in response to the differential signal.

20080225926, Sep 18, 2008

May 9, 2008

12/118629

John P. Gotthold - Sunnyvale CA, US
Terry M. Stapleton - San Jose CA, US
Robert Champetier - Depoe Bay OR, US
Hung Dang - San Jose CA, US

G01J 5/00

374131

A vacuum processing chamber for measuring the temperature of a surface of an object comprising a cap is provided. The cap has a non-deformable end wall of thermally conducting material and a side wall connected thereto. An outside surface of the end wall is shaped to conform to a shape of the object surface to be measured. A surface on an inside of the end wall of the cap emits electromagnetic radiation having a detectable optical characteristic that is proportional to the temperature of the cap end wall. The vacuum processing chamber further comprises a light wave guide having one end held within the cap a distance from the radiation emitting element and in optical communication therewith.