Patents by Inventor David Lum

David Lum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9165493
    Abstract: A video-rendering chip performs gain correction on received display input, based on a display temperature, to produce output values that are shown on the display. The video-rendering chip includes multipliers, a microprocessor, and a memory. The microprocessor receives a display temperature from a sensor, determines gain correction coefficients that correspond to the display temperature, and provides the correction coefficients to the multipliers. The multipliers then multiply the display input by the correction coefficients to produce the output values. The microprocessor may determine the correction coefficients utilizing a lookup table or a correction coefficient formula stored in the memory. The microprocessor may receive an updated display temperature periodically and may determine new correction coefficients that correspond to the updated display temperature. The microprocessor may receive updated display temperatures at fixed periods or at varying periods based on the previous display temperature.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: October 20, 2015
    Assignee: Apple Inc.
    Inventors: Gabriel G. Marcu, David Lum, Wei Chen
  • Patent number: 8847998
    Abstract: The disclosed embodiments relate to a system that communicates a change in a display setting from a display to a host system for the display. During operation, the system determines at the display that the display setting has changed. Next, in response to the change, the system sends an interrupt from the display to the host system through a first interface, wherein the interrupt informs the host system that the display setting has changed. After sending the interrupt to the host system, the system receives a request from the host system to obtain values for one or more display settings including the changed display setting. In response to the request, the system sends updated values for the one or more display settings to the host system.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: September 30, 2014
    Assignee: APPLE Inc.
    Inventors: Maciej Maciesowicz, Jack I. Fu, David Lum
  • Publication number: 20120253887
    Abstract: The intent of this patent is to provide an electronic based platform for the general public and members of particular groups to share their opinion, make payment toward influencing policies, and provide input to commercial, social, financial, and political groups and influence their actions. Demographic, geographic, and other information may also be cross-referenced to increase the utility of the data and focus questions relevant to the participants. Conceptually, we can have the equivalent a NielsenĀ® rating not from a few thousand but millions. We can have the equivalent of Election Day every week or every month. We can have a referendum on issues every day. The implication of its effect on society is a democracy come true. The ease of use and the accessibility will make even the true novice in electronic communication devices enthusiastic participants.
    Type: Application
    Filed: February 15, 2012
    Publication date: October 4, 2012
    Inventors: Peter Lum, Clifford Lum, David Lum, Tiffany Lum
  • Publication number: 20110032275
    Abstract: A video-rendering chip performs gain correction on received display input, based on a display temperature, to produce output values that are shown on the display. The video-rendering chip includes multipliers, a microprocessor, and a memory. The microprocessor receives a display temperature from a sensor, determines gain correction coefficients that correspond to the display temperature, and provides the correction coefficients to the multipliers. The multipliers then multiply the display input by the correction coefficients to produce the output values. The microprocessor may determine the correction coefficients utilizing a lookup table or a correction coefficient formula stored in the memory. The microprocessor may receive an updated display temperature periodically and may determine new correction coefficients that correspond to the updated display temperature. The microprocessor may receive updated display temperatures at fixed periods or at varying periods based on the previous display temperature.
    Type: Application
    Filed: August 10, 2009
    Publication date: February 10, 2011
    Applicant: Apple Inc.
    Inventors: Gabriel G. Marcu, David Lum, Wei Chen
  • Publication number: 20100091048
    Abstract: An apparatus for controlling backlighting of an electronic display, such as a liquid crystal display (LCD) panel. The apparatus may synchronize a power cycle of one or more light-emitting diode (LED) strings to a frame rate of the LCD panel.
    Type: Application
    Filed: October 14, 2009
    Publication date: April 15, 2010
    Applicant: Apple Inc.
    Inventors: Andrew P. Aitken, Paolo Sacchetto, Jason Gomez, David Lum