Power supply system and display apparatus

• US 10,270,333 B2
• Filed: 08/13/2015
• Issued: 04/23/2019
• Est. Priority Date: 06/05/2015
• Status: Active Grant

• Current Assignee: Sitronix Technology Corporation
• Original Assignee: Sitronix Technology Corporation
• Inventors: Liao, Min-Nan
• Primary Examiner(s): Donovan, Lincoln D
• Assistant Examiner(s): Mattison, Dave
• Application Number:
  US14/825,191
• Publication Number:
  US 20160359406A1
• Time in Patent Office: 1,349 Days
• Field of Search: 327536
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3688 suitable for active matrices only
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers
• CPC Class Codes: H02M 1/36 Means for starting or stopping converters
• CPC Class Codes: H02M 3/07 using capacitors charged and discharged alternately by semiconductor devices with control electrode , e.g. charge pumps

Abstract

A power supply system includes a control module for generating a control signal; a first charging pump module, coupled to the control module, for generating an adjustment charging value according to the control signal, and outputting a charging voltage according to the adjustment charging value and a conduction voltage source; an amplifying module, coupled to the first charging pump module, for utilizing the charging voltage to generate an amplifying voltage; and a load module, coupled to the amplifying module, for processing a dynamic charging operation according to the amplifying voltage.

Claims

1. A power supply system, comprising:

a control module for generating a control signal;

a first charging pump module, coupled to the control module, comprising;

a first charging pump circuit comprising a first flying capacitor unit; and

a second charging pump circuit comprising a second flying capacitor unit and a first transistor switch coupled between the first flying capacitor unit and the second flying capacitor unit for selecting one of a first voltage boost factor and a second voltage boost factor according to the control signal, wherein the first flying capacitor unit is serially connected to the second flying capacitor unit when the first voltage boost factor is selected, the second flying capacitor unit is disconnected from the first flying capacitor unit when the second voltage boost factor is selected, and the first charging pump module outputs a charging voltage according to the one of the first voltage boost factor and the second voltage boost factor and a conduction voltage source;

an amplifying module, coupled to the first charging pump module, for utilizing the charging voltage as a voltage source to generate an amplifying voltage; and

a load module, coupled to the amplifying module, for processing a dynamic charging operation according to the amplifying voltage.

2. The power supply system of claim 1, wherein the control signal generated by the control module is utilized to turn on or turn off the second flying capacitor unit, so as to generate the first voltage boost factor and the second voltage boost factor.

3. The power supply system of claim 1, wherein the control module is further coupled to the amplifying module to receive a reference voltage and the amplifying voltage, such that the control module correspondingly outputs the control signal to turn on or turn off the second flying capacitor unit according to a difference between the reference voltage and the amplifying voltage, so as to generate the first voltage boost factor and the second voltage boost factor.

4. The power supply system of claim 1, wherein the dynamic charging operation is operated to output an initiation adjustment charging value when the amplifying voltage is smaller than a predetermined voltage, and is operated to output a termination adjustment charging value when the amplifying voltage is larger than the predetermined voltage, and the initiation adjustment charging value is larger than the termination adjustment charging value.

5. The power supply system of claim 1, further comprising a second charging pump module and a switch module, wherein the switch module is coupled to the first charging pump module, the second charging pump module, the control module and the amplifying module, and the first charging pump module corresponds to a first adjustment charging value and the second charging pump module corresponds to a second adjustment charging value, such that the switch module is operated to switch the first charging pump module or the second charging pump module to be connected to the amplifying module according to the control signal, so as to utilize the first adjustment charging value or the second adjustment charging value for generating the amplifying voltage to be transmitted to the amplifying module.

6. The power supply system of claim 1, wherein the first charging pump module further comprises:

a plurality of charging pump circuits, each charging pump circuit comprises a plurality of transistor switches and a flying capacitor unit;

wherein the control module is coupled to a plurality of flying capacitor units of the plurality of charging pump circuits, to utilize the control signal for turning on or turning off the plurality of flying capacitor units, so as to generate the first voltage boost factor and the second voltage boost factor, such that the first charging pump module outputs the charging voltage to be transmitted to the amplifying module.

8. The power supply system of claim 1, wherein the first charging pump module further comprises a third charging pump circuit comprising:

a third flying capacitor unit; and

a second transistor switch coupled to the first, second and third flying capacitor units;

wherein the first flying capacitor unit is serially connected to the second and third flying capacitor units and the second and third flying capacitor units are paralleled connected when the first voltage boost factor is selected, the second flying capacitor unit is disconnected from the first and second flying capacitor units when the second voltage boost factor is selected;

wherein the control module is coupled to the third flying capacitor unit, to utilize the control signal for turning on or turning off the third flying capacitor unit, so as to generate the first voltage boost factor and the second voltage boost factor, such that the first charging pump module outputs the charging voltage to be transmitted to the amplifying module.

7. A display apparatus, comprising:

a display panel; and

a power supply system, coupled to the display panel, the power supply system comprising;

a first charging pump module, coupled to the control module, comprising;

a first charging pump circuit comprising a first flying capacitor unit; and

a second charging pump circuit comprising a second flying capacitor unit and a first transistor switch coupled between the first flying capacitor unit and the second flying capacitor unit for selecting one of a first voltage boost factor and a second voltage boost factor according to the control signal, wherein the first flying capacitor unit is serially connected to the second flying capacitor unit when the first voltage boost factor is selected, the second flying capacitor unit is disconnected from the first flying capacitor unit when the second voltage boost factor is selected, and the first charging pump module outputs a charging voltage according to the one of the first voltage boost factor and the second voltage boost factor and a conduction voltage source;

an amplifying module, coupled to the first charging pump module, for utilizing the charging voltage as a voltage source to generate an amplifying voltage; and

a load module, coupled to the amplifying module, for processing a dynamic charging operation according to the amplifying voltage, to drive a display operation of the display panel.

9. The display apparatus of claim 7, wherein the first charging pump module further comprises a third charging pump circuit comprising:

a third flying capacitor unit; and

a second transistor switch coupled to the first, second and third flying capacitor units;

wherein the first flying capacitor unit is serially connected to the second and third flying capacitor units and the second and third flying capacitor units are paralleled connected when the first voltage boost factor is selected, the second flying capacitor unit is disconnected from the first and second flying capacitor units when the second voltage boost factor is selected;

wherein the control module is coupled to the third flying capacitor unit, to utilize the control signal for turning on or turning off the third flying capacitor unit, so as to generate the first voltage boost factor and the second voltage boost factor, such that the first charging pump module outputs the charging voltage to be transmitted to the amplifying module.