Kin Sang Chan

US Patent:

6433917, Aug 13, 2002

Filed:

Nov 22, 2000

Appl. No.:

09/718619

Inventors:

Wenhui Mei - Plano TX
Kin Foong Chan - Plano TX

Assignee:

Ball Semiconductor, Inc. - Allen TX

International Classification:

G02B 2608

US Classification:

359292, 359291

Abstract:

A light modulation element, device, and system is discussed. The light modulation element includes three electrodes, a flexible member, and a mirror. The flexible member is connected between the three electrodes so that the first and second electrodes are on one side and the third electrode is on the opposite side of the flexible member. The mirror is attached to the flexible member so that it can move therewith. The flexible member moves responsive to an external electrostatic force provided by one or more of the three electrodes so that the mirror is positioned in a predetermined position responsive to the state of the flexible member.

US Patent:

6512625, Jan 28, 2003

Filed:

Dec 1, 2000

Appl. No.:

09/728691

Inventors:

Wenhui Mei - Plano TX
Kin Foong Chan - Plano TX
Dong Youn Sim - Miyagi-ken, JP

Assignee:

Ball Semiconductor, Inc. - Allen TX

International Classification:

G02B 2600

US Classification:

359290, 359291

Abstract:

A light modulation element, device, and system is discussed. The light modulation element includes three electrodes, a flexible member, and a mirror. The flexible member is connected between the three electrodes so that the first and second electrodes are on one side and the third electrode is on the opposite side of the flexible member. The mirror is attached to the flexible member so that it can move therewith. The flexible member moves responsive to an external electrostatic force provided by one or more of the three electrodes so that the mirror is positioned in a predetermined position responsive to the state of the flexible member.

US Patent:

6658315, Dec 2, 2003

Filed:

Oct 31, 2001

Appl. No.:

09/682911

Inventors:

Kin Chan - Plano TX

Assignee:

Ball Semiconductor, Inc. - Allen TX

International Classification:

G06F 1900

US Classification:

700121, 716 21

Abstract:

A system and method for non-synchronously projecting light in an imaging system is provided. A pixel panel may be selectively controlled to direct light onto or away from a subject. A light source, such as a laser diode, projects light pulses at the pixel panel. The pulses are not synchronized with the pixel panel, so the light may strike the pixel panel at any time when the pixel panel is operable to direct light towards the subject. The pulses may be constant or variable in energy or duration, depending on the desired results.

US Patent:

7062094, Jun 13, 2006

Filed:

Feb 14, 2002

Appl. No.:

09/683789

Inventors:

Xiaoqi Zhou - Richardson TX, US
Wenhui Mei - Plano TX, US
Takashi Kanatake - Dallas TX, US
Kin Foong Chan - Plano TX, US

Assignee:

Disco Corporation - Tokyo

International Classification:

G06K 9/36
H04N 1/413

US Classification:

382232, 35842613

Abstract:

A method for losslessly transmitting data is provided. The data is separated into two or more portions and the second portion is subtracted from the first portion to find a difference. The first portion and the difference are transmitted, and then the second portion is reconstructed by adding the difference to the first portion. The data may comprise two or more images, with each image being a temporally displaced version of the preceding image. Each image may be divided into multiple areas, where the areas on each image correspond to the areas on the other images. A difference may be obtained by subtracting each area of an image from the corresponding area of the preceding image. The first image may then be transferred as a reference image along with the differences, and each image may be reconstructed by adding each difference to the corresponding area of the previous image.

US Patent:

20020126479, Sep 12, 2002

Filed:

Mar 7, 2002

Appl. No.:

09/683971

Inventors:

Jinhui Zhai - Plano TX, US
Wenhui Mei - Plano TX, US
Kin Chan - Plano TX, US

Assignee:

Ball Semiconductor, Inc. - Allen TX

International Classification:

F21V033/00
F21S002/00
G02B006/00
G02B005/32

US Classification:

362/244000, 345/032000, 362/227000, 362/234000, 359/020000, 359/015000, 385/147000

Abstract:

A high power light source is provided. The light source includes one or more diodes that may produce relatively coherent light of a desired intensity. The diodes may be pulsed to provide light as desired. The light projected by the diodes passes through a combiner, which combines the light from the different diodes and passes the combined light to an incoherence apparatus. The incoherence apparatus may include a rotating surface relief phase device such as an optical hologram, a computer generated hologram, or a diffractive optical element with random phase modulation. The incoherence apparatus may include a rotating fiber conduit comprising a plurality of multifiber cores. The incoherence apparatus renders the combined light incoherent and passes it to an illuminator apparatus that focuses the incoherent combined light onto an image plane.

US Patent:

20020133144, Sep 19, 2002

Filed:

Mar 19, 2001

Appl. No.:

09/812219

Inventors:

Kin Chan - Plano TX, US
Jeffrey Whitman - Dallas TX, US
Suzanne Ahn - Dallas TX, US

Assignee:

Ball Semiconductor, Inc.

International Classification:

A61B018/20

US Classification:

606/004000

Abstract:

A digital micromirror device is used in a semi-automated system to reflect a tailored portion of a laser beam according to image data that defines a mapped target area of an object for selective irradiation by the tailored laser beam. A computer having an interface device, such as a light pen, is used to map the boundary on a computer screen of a target area of an object, which may be the retina of a patient's eye or some other object. A projector cooperates with a laser source, the digital micromirror device and the computer to enable a laser beam to be tailored to correspond to the irregular shape of the intended target area to avoid irradiating portions of the object other than the target area itself. The system is capable of tracking movement of the target area and maintaining the tailored laser beam aligned to irradiate the target area during movement. The individual micromirrors of the digital micromirror device can be time-division modulated to vary the dose of irradiation across the target area according to a gray-scale map of the image of the target area.

US Patent:

20020149834, Oct 17, 2002

Filed:

Nov 15, 2001

Appl. No.:

09/999149

Inventors:

Wenhui Mei - Plano TX, US
Kin Chan - Plano TX, US
Dong Sim - Sendai, JP

Assignee:

Ball Semiconductor, Inc. - Allen TX

International Classification:

G02B026/00
G02F001/29

US Classification:

359/295000, 359/290000, 359/291000, 359/292000

Abstract:

A light modulation element, device, and system is discussed. The light modulation element includes three electrodes, a rigid member, and a mirror. The rigid member is connected between the three electrodes so that the first and second electrodes are on one side and the third electrode is on the opposite side of the rigid member. The mirror is attached to the rigid member so that it can move therewith. The rigid member moves responsive to an external electrostatic force provided by one or more of the three electrodes so that the mirror is positioned in a predetermined position responsive to the state of the rigid member.

US Patent:

20020171047, Nov 21, 2002

Filed:

Mar 28, 2001

Appl. No.:

09/820030

Inventors:

Kin Chan - Plano TX, US
Wenhui Mei - Plano TX, US
Jinhui Zhai - Plano TX, US
Akira Ishikawa - Royse City TX, US

International Classification:

G21G005/00

US Classification:

250/492100

Abstract:

A system for performing digital lithography onto a subject is provided. The system includes a laser diode or LED array for generating and projecting a digital pattern. The array has a plurality of lasers which may be controlled either individually or as a group to produce the desired pattern. A lens system may then direct the digital pattern to the subject, thereby enabling the lithography.