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Patent Issued for Electronic Device Configured to Operate in a Normal Mode and a Low Power Mode (USPTO 10013910)

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07/12/2018 | 11:40pm CEST

By a News Reporter-Staff News Editor at Electronics Newsweekly -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventor Park, Sung-Un (Suwon-si, KR), filed on March 15, 2017, was published online on July 3, 2018.

The assignee for this patent, patent number 10013910, is Samsung Display Co. Ltd. (KR).

Reporters obtained the following quote from the background information supplied by the inventors: "Exemplary embodiments of the present inventive concept relate to electronic devices, and more particularly, to electronic devices capable of reducing interface power consumptions in low power modes and methods of operating the electronic devices.

"Recently, an electronic device is requested to support a low power mode to reduce power consumption. In particular, in a portable electronic device, such as a smart phone, the low power mode is highly required to be used as long as possible even if a charge amount of a battery is small. To meet these requirements, an ultra low power saving (ULPS) mode has been developed as the low power mode of the portable electronic device. In the ULPS mode, the portable electronic device may perform only basic functions, such as a phone call, a text, or an internet, and/or only limited applications, such as a memo application, a messenger application, or the like so as to reduce the power consumption of the portable electronic device. However, it is more desirable to further reduce the power consumption in the low power mode, such as the ULPS mode."

In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventor's summary information for this patent: "Some example embodiments provide an electronic device capable of reducing interface power consumption between a host device and a display device in a low power mode.

"Some example embodiments provide a method of operating an electronic device capable of reducing interface power consumption between a host device and a display device in a low power mode.

"According to example embodiments, there is provided an electronic device including a host device configured to provide a display device with first image data having a first number of bits per pixel in a normal mode, and to convert the first image data into second image data having a second number of bits per pixel less than the first number of bits per pixel to provide the display device with the second image data in a low power mode, and the display device configured to display a first image based on the first image data in the normal mode, and to convert the second image data into third image data to display a second image based on the third image data in the low power mode.

"In example embodiments, the host device may include a first data converting block configured to bypass the first image data in the normal mode, and to convert the first image data into the second image data in the low power mode.

"In example embodiments, the first data converting block may convert RGB data as the first image data into luminance data as the second image data in the low power mode.

"In example embodiments, the first data converting block may convert the RGB data into the luminance data using an equation 'Y=0.25*R+0.5*G+0.25*B', where Y represents a value of the luminance data, R represents a value of red sub-pixel data of the RGB data, G represents a value of green sub-pixel data of the RGB data, and B represents a value of blue sub-pixel data of the RGB data.

"In example embodiments, the second number of bits per pixel of the second image data may be one third of the first number of bits per pixel of the first image data.

"In example embodiments, the display device may include a second data converting block configured to bypass the first image data in the normal mode, and to convert the second image data into the third image data in the low power mode.

"In example embodiments, the second data converting block may convert luminance data as the second image data into black-and-white data as the third image data in the low power mode.

"In example embodiments, the black-and-white data may include red sub-pixel data, green sub-pixel data and blue sub-pixel data each having a value the same as a value of the luminance data with respect to each pixel.

"In example embodiments, the display device may display a color image as the first image in the normal mode, and may display a black-and-white image as the second image in the low power mode.

"In example embodiments, the electronic device may further include a plurality of data lanes located between the host device and the display device, the plurality of data lanes being used to transfer the first image data and the second image data.

"In example embodiments, the first image data may be transferred through the plurality of data lanes in the normal mode, and the second image data may be transferred through a portion of the plurality of data lanes in the low power mode.

"In example embodiments, supplying power to a remaining portion of the plurality of data lanes through which the second image data are not transferred may be stopped during the low power mode.

"In example embodiments, the first image data may be transferred from the host device to the display device using a dual display serial interface in the normal mode, and the second image data may be transferred from the host device to the display device using a single display serial interface in the low power mode.

"According to example embodiments, there is provided an electronic device including a host device configured to provide a display device with RGB data having a first number of bits per pixel in a normal mode, and to convert the RGB data into luminance data having a second number of bits per pixel less than the first number of bits per pixel to provide the display device with the luminance data in a low power mode, and the display device configured to display a color image based on the RGB data in the normal mode, and to convert the luminance data into black-and-white data to display a black-and-white image based on the black-and-white data in the low power mode.

"According to example embodiments, there is provided a method of operating an electronic device including a host device and a display device. In the method, the host device provides the display device with first image data having a first number of bits per pixel in a normal mode. The host device provides the display device with second image data having a second number of bits per pixel less than the first number of bits per pixel in a low power mode by converting the first image data into the second image data. The display device displays a first image based on the first image data in the normal mode, and the display device displays a second image based on third image data in the low power mode by converting the second image data into the third image data.

"In example embodiments, the first image data may be RGB data, and the second image data may be luminance data.

"In example embodiments, the second number of bits per pixel of the second image data may be one third of the first number of bits per pixel of the first image data.

"In example embodiments, the third image data may be black-and-white data including red sub-pixel data, green sub-pixel data and blue sub-pixel data each having a value the same as a value of the second image data with respect to each pixel.

"In example embodiments, the first image may be a color image, and the second image may be a black-and-white image.

"In example embodiments, the first image data may be transferred through a plurality of data lanes between the host device and the display device in the normal mode, and the second image data may be transferred through a portion of the plurality of data lanes in the low power mode.

"As described above, in the electronic device and the method of operating the electronic device according to example embodiments, the host device may transfer, in the low power mode, the second image data having the number of bits per pixel less than the number of bits per pixel of the first image data transferred in the normal mode to the display device, and thus the interface power consumption between the host device and the display device in the low power mode may be reduced.

"Further, in the electronic device and the method of operating the electronic device according to example embodiments, the image data may be transferred in the low power mode using a portion of the plurality of data lanes between the host device and the display device, and thus the interface power consumption between the host device and the display device in the low power mode may be further reduced."

For more information, see this patent: Park, Sung-Un. Electronic Device Configured to Operate in a Normal Mode and a Low Power Mode. U.S. Patent Number 10013910, filed March 15, 2017, and published online on July 3, 2018. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=10013910.PN.&OS=PN/10013910RS=PN/10013910

Keywords for this news article include: Business, Electronics Companies, Samsung Display Co. Ltd.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2018, NewsRx LLC

(c) 2018 NewsRx LLC, source Technology Newsletters

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