Load driver

• US 10,418,990 B2
• Filed: 03/14/2018
• Issued: 09/17/2019
• Est. Priority Date: 04/18/2007
• Status: Active Grant

• Current Assignee: Monterey Research, LLC (Vector Capital Corporation)
• Original Assignee: Monterey Research, LLC (Vector Capital Corporation)
• Inventors: Wright, David G., Muriby, Jason Faris, Hancioglu, Erhan
• Primary Examiner(s): Nguyen, Long
• Application Number:
  US15/921,403
• Publication Number:
  US 20180205376A1
• Time in Patent Office: 552 Days
• Field of Search: None
• CPC Class Codes: H03K 17/687 the devices being field-effect transistors
• CPC Class Codes: H03K 19/0016 by using a control or a clock signal, e.g. in order to apply power supply
• CPC Class Codes: H03K 19/00369 Modifications for compensating variations of temperature, supply voltage or other physical parameters

Abstract

A method for driving a load includes driving a load to an initial voltage within a voltage window, the voltage window based on an input voltage and an offset voltage, and driving the load to approximately the input voltage.

Claims

1. A device, comprising:

a first circuit configured to drive an output terminal to a first voltage; and

a second circuit configured to adjust the first voltage at the output terminal to a second voltage,

wherein the first circuit and the second circuit are configured to be operational alternatively, and

wherein the first and second circuits are configured to be turned off when the second voltage reaches a steady state.

2. The device of claim 1, wherein the output terminal is configured to drive an electronic display.

3. A device, comprising:

a first circuit configured to drive an output terminal to a first voltage, wherein the first voltage is configured to be within a voltage range defined by an upper voltage and a lower voltage; and

a second circuit configured to adjust the first voltage at the output terminal to a second voltage, wherein the first circuit and the second circuit are configured to be operational alternatively, wherein the first circuit comprises;

a first comparator configured to control a first switch according to at least an outcome of comparing the first voltage to the lower voltage; and

a second comparator configured to control a second switch according to at least an outcome of comparing the first voltage to the upper voltage.

4. The device of claim 3, further comprising:

a first current source configured to charge the output terminal when the first switch is turned on; and

a second current source configured to discharge the output terminal when the second switch is turned on.

5. A method comprising:

driving a load to a first voltage within a voltage window, the voltage window based on at least an input voltage and an offset voltage;

adjusting the first voltage to a second voltage, the second voltage approximates the input voltage;

configuring the driving the load to the first voltage and the adjusting the first voltage to the second voltage to operate alternatively; and

configuring the voltage window to be defined by an upper voltage and a lower voltage,

wherein the upper voltage is substantially a sum of the input voltage and the offset voltage,

wherein the lower voltage is substantially a difference between the input voltage and the offset voltage.

6. A device comprising:

a circuit configured to;

drive a load to an initial non-zero voltage within a voltage window, the voltage window based on an input voltage and an offset voltage;

drive the load to approximately the input voltage in response to driving the load to the initial non-zero voltage; and

be turned off when the load is at a steady state voltage, the steady state voltage being approximately the input voltage.

7. The device of claim 6, further comprising:

an electronic display device, the electronic display device coupled to the circuit and providing the load.

8. The device of claim 7, wherein the electronic display device comprises a liquid crystal display panel.