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Lum
Chee Foo Lum, Penang MY
| Patent application number | Description | Published |
|---|---|---|
| 20080251700 | ENCODER WITH A COMBINED POSITION AND INDEX TRACK - An optical encoder. The encoder includes a coding element, an emitter, and a detector. The coding element has a track with a track pattern. The track pattern includes a plurality of optically distinguishable sections, which include a plurality of position sections and an index section. The emitter generates a light signal incident on the track of the coding element. The detector includes a combined position and index photodetector array. The combined position and index photodetector array includes a plurality of position photodetectors and an index photodetector. Embodiments of this type of optical encoder implement position and index sections in a single track on the coding element. | 10-16-2008 |
| 20080251701 | ENCODER WITH A COMBINED POSITION AND INDEX TRACK - An optical encoder. The encoder includes a coding element, an emitter, and a detector. The coding element has a track with a track pattern. The track pattern includes a plurality of optically distinguishable sections, which include a plurality of position sections and an index section. The emitter generates a light signal incident on the track of the coding element. The detector includes a combined position and index photodetector array. The combined position and index photodetector array includes a plurality of position photodetectors and an index photodetector. Embodiments of this type of optical encoder implement position and index sections in a single track on the coding element. | 10-16-2008 |
| 20100127162 | OPTICAL JOG WHEEL WITH SPIRAL CODING ELEMENT - A user navigational apparatus. The user navigational apparatus includes a dial, a coding element, and an encoder. The coding element is coupled to a dial. The coding element includes a track of alternating reflective and non-reflective sections, each having a substantially oblique leading edge relative to a direction of movement of the coding element. The encoder includes an emitter and a detector. The emitter generates a light signal incident on the track of the coding element. The detector detects a reflected light signal which corresponds to a portion of the incident light signal that is reflected off of the reflective sections of the track. The detector also generates a channel signal corresponding to the reflected light signal. | 05-27-2010 |
Chee Foo Lum, Bayan Lepas MY
| Patent application number | Description | Published |
|---|---|---|
| 20110267268 | BACKLIGHTING FOR OPTICAL FINGER NAVIGATION - An optical finger navigation (OFN) device includes an OFN sensor module, a light source, and a vertical light guide. The OFN sensor module is coupled to a circuit substrate. The OFN sensor module generates a navigation signal in response to a movement detected at a navigation surface based on light reflected from a user's finger. The light source is also coupled to the circuit substrate. The light source generates light (which is separate from the light generated for the OFN sensor module). The vertical light guide is disposed to circumscribe a perimeter of the OFN sensor module. The vertical light guide receives the light from the light source and guides the light toward a light emission surface at a perimeter surface area circumscribing the navigation surface. | 11-03-2011 |
Choong Kead Leslie Lum, Singapore SG
Lye Yoong Lum, Singapore SG
| Patent application number | Description | Published |
|---|---|---|
| 20100270068 | TUNER HOUSING - A tuner housing according to the invention comprises a support for carrying electronic equipment and at least one cover part which is attached to the support. The support comprises at least one ground lug which extends through a hole of the cover part. The cover part is provided with a projection which projects into the hole and contacts the ground lug. | 10-28-2010 |
Marvin K. Lum, Calgary CA
| Patent application number | Description | Published |
|---|---|---|
| 20110137702 | WORKFLOW APPLICATIONS - A facility is described for enabling workflow applications. The facility receives a request to identify an optimized resource list that identifies resources capable of performing a workflow process task. The workflow process task can be associated with a document type relating to a document associated with a workflow envelope. The workflow envelope can store multiple documents of at different document types. The facility includes a workflow engine and a simulation engine. The workflow engine performs workflow process tasks based on the tasks identified in the workflow envelope. The simulation engine can employ modeling and historical data from a workflow metrics data source to generate the optimized resource list and identify identifying resources matching the workflow process tasks identified in the workflow envelope. | 06-09-2011 |
Ooi Lin Lum, Singapore SG
| Patent application number | Description | Published |
|---|---|---|
| 20100145096 | Process for Recovery and Purification of Lactic Acid - The present invention relates to a process for recovery and purification of lactic acid from a fermentation broth containing lactic acid. The process comprises subjecting the fermentation broth to ultrafiltration and/or microfiltration to form a first permeate, concentrating the first permeate to form concentrated broth, subjecting the concentrated broth to supported liquid membrane for extraction of lactic acid into a separate stream, subjecting the extracted lactic acid solution to activated carbon for removal of colour, subjecting the extracted lactic acid solution to cation exchange resin for deminerization, subjecting the extracted lactic acid solution to anion exchange resin for removal of anionic impurities and concentrating the extracted lactic acid solution to desired concentration. The supported liquid membrane of the present invention contains an organic layer that comprises a earner, a co-extractant, a diluent and a stabilizer. | 06-10-2010 |
| 20110028759 | Process for the Purification of Organic Acids - A process for recovery and purification of an organic acid from a fermentation broth containing a salt form of the organic acid, comprises the steps of subjecting the fermentation broth to one of ultrafiltration and microfiltration to form a first permeate, concentrating the first permeate to form a concentrated broth, subjecting the concentrated broth to a supported liquid membrane for extraction of lactic acid into a separate stream comprising an extracted solution, subjecting the extracted solution to activated carbon for colour removal, a cation exchange resin for demineralization, and an anion exchange resin for removal of anionic impurities to form a post polished organic acid, filtering the post polished organic acid to remove impurities above a predetermined threshold and concentrating the post polished organic acid to a desired concentration. | 02-03-2011 |
Richard Lum, Singapore SG
| Patent application number | Description | Published |
|---|---|---|
| 20110163233 | Optical Proximity Sensor with Improved Dynamic Range and Sensitivity - Various embodiments of an optical proximity sensor and corresponding circuits and methods for measuring small AC signal currents arising from the detection of pulsed AC light signals emitted by a light emitter and reflected from an object to detected in the presence of larger ambient light DC current signals are disclosed. Circuits and corresponding methods are described that improve the dynamic range, sensitivity and detection range of an optical proximity sensor by cancelling the contributions of DC current signals arising from ambient light signals that otherwise would dominate the detected small AC signal currents. The DC signal cancellation occurs in a differential amplifier circuit before small AC signal currents are provided to an analog-to-digital converter The circuits and methods may be implemented using conventional CMOS design and manufacturing techniques and processes. | 07-07-2011 |
Richard K.k. Lum, Singapore SG
| Patent application number | Description | Published |
|---|---|---|
| 20090154206 | Circuit and associated method for reducing power consumption in an a power transformer - A method and circuit is provided for reducing power consumption in a power transformer, typically incorporated into an electrical or electronic device such as a consumer device. In an embodiment, a detection/isolation circuit is coupled to an input of a power transformer/rectifier via a switching device. The switching device can be, for example, a solid state relay. The detection/isolation circuit is configured to sense the occurrence of no-load conditions in the power transformer and responsively disengage the power transformer from a coupled source of power (e.g., wall outlet) via the coupled switching device. | 06-18-2009 |
Richard Kok Keong Lum, Singapore SG
| Patent application number | Description | Published |
|---|---|---|
| 20080197271 | Temperature-Compensated High Dynamic Range Optical Receiver - A light sensor having a photocurrent subsection and an interface circuit is disclosed. The photocurrent subsection includes a photodetector, an amplifier, a diode and an impedance element. The first photodetector generates a current between a first node and a power rail in response to being illuminated with light. The interface circuit generates an output signal that is related to the logarithm of the intensity of light that is incident on the photodetector. The impedance element is constructed in a manner that compensates for the thermal dependency of the impedance through the diode. Additional photocurrent subsections can be added to further reduce the thermal dependency of the output signal. | 08-21-2008 |
| 20090206817 | High Voltage Drive Circuit Employing Capacitive Signal Coupling and Associated Devices and Methods - According to one embodiment, there is provided a high voltage drive circuit comprising drive and sense electrodes formed substantially in a single plane. The device effects signal transfer between drive and receive circuits through the drive and sense electrodes by capacitive means, and permits high voltage devices, such as IGBTs, to be driven thereby without the use of high voltage transistors, thereby eliminating the need to use expensive fabrication processes such as SOI when manufacturing high voltage gate drive circuits and ICs. The device may be formed in a small package using, by way of example, using CMOS or other conventional low-cost semiconductor fabrication and packaging processes. | 08-20-2009 |