Systems and methods for display systems with dynamic power control

• US 9,606,607 B2
• Filed: 08/14/2014
• Issued: 03/28/2017
• Est. Priority Date: 05/17/2011
• Status: Active Grant

• Current Assignee: IGNIS Innovation Incorporated
• Original Assignee: IGNIS Innovation Incorporated
• Inventors: Chaji, Gholamreza
• Primary Examiner(s): Lee, Jr., Kenneth B
• Application Number:
  US14/459,979
• Publication Number:
  US 20140354624A1
• Time in Patent Office: 957 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06F 1/3218 of display devices
• CPC Class Codes: G06F 1/3265 Power saving in display device
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2300/0866 by means of changes in the pixel supply voltage
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2320/045 Compensation of drifts in the characteristics of light emitting or modulating elements
• CPC Class Codes: G09G 2320/048 using evaluation of the usage time
• CPC Class Codes: G09G 2320/0613 The adjustment depending on the type of the information to be displayed
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/022 in absence of operation, e.g. no data being entered during a predetermined time
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

Methods and systems to dynamically adjust a voltage supply of a display are provided. Systems are provided to receive a digital data input indicative of an amount of luminance to be emitted from the display, to determine a desired supply voltage to supply to the display based on the received digital data, and to adjust an adjustable voltage supply according to the determined desired supply voltage. Furthermore, the methods and systems disclosed herein provide for dynamically separately controlling supply voltages supplied to distinct subsections of the display. Systems and methods are also provided for operating a display device in an idle mode by turning off subsections of the display that would otherwise be shown dark and thereby save energy required to program the subsections with display information.

Claims

1. A system for driving a display, the system comprising:

multiple pixel circuits arranged in an array, each of said pixel circuits comprising a light emitting device and a driving transistor for conveying a driving current through the light emitting device;

a controller for determining when said display is to be in a standby mode; and

multiple frame buffers pre-loaded with image data for programming only selected pixel circuits when the display is in a standby mode.

2. The system of claim 1 in which said frame buffers include both full frame buffers storing data for programming a first group of selected pixel circuits when the display is in a standby mode, and partial frame buffers storing data for programming only the changes for a second group of elected pixel circuits when the display is in a standby mode.

3. The system of claim 1 in which said frame buffers are accessed sequentially to change the display in a predetermined sequence.

4. The system of claim 3 in which said frame buffers contain data representing the display of an object moving along a predetermined trajectory.