POWERING MOBILE DEVICE DISPLAYS USING DIFFERENT VOLTAGE RANGES

• US 20180166005A1
• Filed: 12/08/2016
• Published: 06/14/2018
• Est. Priority Date: 12/08/2016
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Lee, Yiting, Suzuki, Nobuyuki, Ji, Gang, Tsai, Jackson, Hsiao, Jimmy Y.
• Granted Patent: US 10,446,088 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 1/263 Arrangements for using multiple switchable power supplies, e.g. battery and AC G06F1/30 takes precedence
• CPC Class Codes: G09G 2320/064 by time modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2360/04 Display device controller operating with a plurality of display units
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336

Abstract

An example apparatus for powering a mobile device display includes a first voltage regulator electronically to be electronically coupled to a display backlight and to a power rail. The power rail is coupled to a power source to provide a first voltage within a first range of voltages. The first voltage regulator is to provide a second voltage within a second range of voltages to the display backlight. The apparatus also includes a second voltage regulator to be electronically coupled to display electronics of the mobile device display and the power rail. The second voltage regulator is to provide a third voltage within a third range of voltages to the display electronics. The first range of voltages, the second range of voltages, and the third range of voltages, are different voltages.

Claims

1. An apparatus for powering a mobile device display, comprising:

a first voltage regulator to be electronically coupled to a display backlight and to a power rail, the power rail coupled to a power source to provide a first voltage within a first range of voltages, the first voltage regulator to provide a second voltage within a second range of voltages to the display backlight; and

a second voltage regulator to be electronically coupled to display electronics of the mobile device display and to the power rail, the second voltage regulator to provide a third voltage within a third range of voltages to the display electronics, wherein the first range of voltages, the second range of voltages, and the third range of voltages comprise different voltages.

2. The apparatus of claim 1, wherein the second voltage regulator is further to be electronically coupled to a second power rail coupled to a power management system, the power management system coupled to the power rail, the second power rail to provide an additional voltage within an additional range of voltages to the second voltage regulator, wherein the additional range of voltages is different from the first range of voltages.

3. The apparatus of claim 1, comprising a power routing switch to be electronically coupled to the power rail to provide the first voltage from the power source.

4. The apparatus of claim 1, wherein the power source comprises two or more cells.

5. The apparatus of claim 1, wherein the first range of voltages, the second range of voltages, and the third range of voltages, each comprise a differing output voltage value plus or minus three percent of a differing input voltage value.

6. The apparatus of claim 1, wherein the second range of voltages comprises a smaller range within a larger range of 6 to 8.4 volts.

7. The apparatus of claim 1, wherein the first voltage range a smaller range within a larger range of 9 to 12.6 volts.

8. The apparatus of claim 1, wherein the first voltage regulator or the second voltage regulator comprises a linear voltage regulator.

9. The apparatus of claim 1, wherein the first voltage regulator or the second voltage regulator comprises a pulse width modulator regulator.

10. The apparatus of claim 1, comprising a power routing switch comprising a low-voltage field-effect transistor.

11. A method for powering a mobile device display, comprising:

providing, via a power rail, a first voltage within a first range of voltages to voltage regulators directly from a power source;

converting, via the voltage regulators, the first voltage into one or more converted voltages within one or more converted ranges of voltages; and

providing, via the voltage regulators, a converted voltage within a converted range of voltages to a display backlight and a display electronics of the display, wherein the first range of voltages and the converted ranges of voltages comprise different voltages.

12. The method of claim 11, comprising providing, via a second rail, a second voltage within a second range of voltages to one of the voltage regulators.

13. The method of claim 11, wherein converting the voltage into the one or more converted voltages comprises using pulse width modulation to control the one or more converted ranges of voltages.

14. The method of claim 11, wherein providing the first voltage to the voltage regulators directly from the power source comprises routing the first voltage from the power source via a low-voltage field-effect transistor.

15. The method of claim 11, wherein providing the converted voltage to the display backlight and the display electronics comprises maintaining the converted voltage within the converted range of voltages.

16. A system for powering a mobile device display, comprising:

a display panel comprising a display backlight and display electronics;

a first voltage regulator to be electronically coupled to the display backlight and to a power rail, the power rail coupled to a power source to provide a first voltage within a first range of voltages, the first voltage regulator to provide a second voltage within a second range of voltages to the display backlight; and

a second voltage regulator to be electronically coupled to the display electronics and the power rail to provide a third voltage within a third range of voltages to the display electronics, wherein the first range of voltages, the second range of voltages, and the third range of voltages, comprise different voltages.

17. The system of claim 16, wherein the second voltage regulator is further to be electronically coupled to a second power rail coupled to a power management system, the power management system coupled to the power rail, the second power rail to provide a fourth voltage within a fourth range of voltages to the second voltage regulator.

18. The system of claim 16, comprising a power routing switch to be electronically coupled to the power rail to provide a fourth voltage within a fourth range of voltages to the power rail from the power source.

19. The system of claim 16, wherein the power source comprises a two cell, a three cell, or a four cell battery.

20. The system of claim 16, wherein the mobile device display comprises a resolution of full high-definition or higher resolution.