Ellen Ai Lee

US Patent:

8391367, Mar 5, 2013

Filed:

Dec 23, 2009

Appl. No.:

12/645740

Inventors:

Leslie D. Kohn - Saratoga CA, US
Ellen M. Lee - Saratoga CA, US

Assignee:

Ambarella, Inc. - Santa Clara CA

International Classification:

H04N 11/02

US Classification:

3752402, 37524023, 37524025, 37524026

Abstract:

An apparatus comprising a transform circuit, a first coder circuit, a second coder circuit, and a memory circuit. The transform circuit may be configured to generate (i) one or more first coefficients in response to a sample signal when in a first mode and (ii) the sample signal in response to the first coefficients when in a second mode. The first coder circuit may be configured to generate (i) a first bitstream signal in response to one or more second coefficients when in the first mode and (ii) the second coefficients in response to the first bitstream signal when in the second mode. The second coder circuit may be configured to generate (i) a second bitstream signal in response to one or more third coefficients when in the first mode and (ii) the third coefficients in response to the second bitstream signal when in the second mode. The memory circuit may be configured to store the first coefficients, the second coefficients, and the third coefficients. The memory may be configured to allow the transform circuit, the first coder circuit, and the second coder circuit to operate independently.

US Patent:

20220297381, Sep 22, 2022

Filed:

Jun 6, 2022

Appl. No.:

17/833185

Inventors:

- Dearborn MI, US
Siddharthan Selvasekar - Livermore CA, US
Ching-Hung Chuang - Northville MI, US
Ellen Lee - Ann Arbor MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

B29C 64/386
B33Y 80/00
B33Y 10/00
B33Y 50/00
B29D 24/00

Abstract:

A part formed by an additive manufacturing process consist of regions of voids, regions of solid material, and regions of non-uniform lattice cells, where each lattice cell includes bars. The regions are spatially distributed throughout the part as a function of load conditions such that the solid material is distributed in regions of first load paths and the non-uniform lattice cells are distributed in regions of second load paths lower in magnitude than the first load paths. Diameters of each bar of a non-uniform lattice cell are sized as a function of at least one of a resolution unit of the additive manufacturing process and part performance requirements. The diameters of the bars of the non-uniform lattice cells are classified into clusters with an average diameter size being assigned to all non-uniform lattice cells in the same cluster.

US Patent:

20190152150, May 23, 2019

Filed:

Nov 20, 2017

Appl. No.:

15/817330

Inventors:

- Dearborn MI, US
Siddharthan Selvasekar - Livermore CA, US
Ching-Hung Chuang - Northville MI, US
Ellen Lee - Ann Arbor MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

B29C 64/386
B33Y 10/00
B33Y 80/00

Abstract:

A part formed by an additive manufacturing process is provided, which consists of three (3) regions: regions of voids with no material; regions of solid material; and regions of non-uniform lattice cells. The regions are spatially distributed throughout the part as a function of load conditions such that the solid material is distributed in regions of first load paths and the lattice cells are distributed in regions of second load paths lower in magnitude than the first load paths. The lattice cells are tailored to the additive manufacturing process constraints and machine resolution.