Driver circuit for LCDM

• US 20030142083A1
• Filed: 01/28/2002
• Published: 07/31/2003
• Est. Priority Date: 01/28/2002
• Status: Active Grant

• Current Assignee: Inventec Corporation
• Original Assignee: Inventec Corporation
• Inventors: Yu, William
• Granted Patent: US 6,753,855 B2
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: H05B 41/36 Controlling

Abstract

A driver circuit of an LCDM is disclosed. The driver circuit contains a driving unit and a transformer unit. When the LCDM needs to drive a plurality of inverters, the driving unit sends out a driving voltage in an asynchronous way to drive the transformer unit. The transformer unit amplifies the driving voltage and sends it to the lamps. The invention thus achieves the goal of driving the LCDM using different timings within a work period.

Claims

1. A driver circuit for LCDM (liquid crystal display module) that is installed with a plurality of lamps to be driven within a work period, the driver circuit comprising:

a driving unit, which receives the work period, performs operations on the work period and, after the operations being completed, sends a plurality of driving voltages in an asynchronous way to an output terminal within the work period; and

a transformer unit, which is connected to the driving unit for receiving, amplifying and transforming the plurality of driving voltages and transmitting them to the plurality of lamps.

2. The driver circuit of claim 1, wherein the driving unit further comprises:

a driving unit, which receives the work period, performs operations on the work period, and, after the operations being completed, produces a plurality of driving signals in an asynchronous way to a first output terminal and a second output terminal;

a first switching unit, which is connected to the first output terminal for converting the driving signal into the driving voltage to be sent to the first output terminal; and

a second switching unit, which is connected to the second output terminal for converting the driving signal into the driving voltage to be sent to second the output terminal.

3. The driver circuit of claim 1 or 2, wherein the transformer unit further comprises:

a first amplifying unit, which is connected to the first switching unit for amplifying and transmitting the driving voltage to the first output terminal;

a second amplifying unit, which is connected to the second switching unit for amplifying and transmitting the driving voltage to the second output terminal;

a first transforming unit, which is connected to the first amplifying unit for transforming and transmitting the driving voltage to the lamps; and

a second transforming unit, which is connected to the second amplifying unit for transforming and transmitting the driving voltage to the lamps.

4. The driver circuit of claim 1, wherein the lamp is a CCFL (cold cathode fluorescent lamp).

5. The driver circuit of claim 2, wherein the driving unit is a control IC (integrated circuit).

6. The driver circuit of claim 3, wherein the first amplifying unit is an MOSFET (metal oxide semiconductor field effect transistor).

7. The driver circuit of claim 3, wherein the second amplifying unit is an MOSFET (metal oxide semiconductor field effect transistor).

8. The driver circuit of claim 3, wherein the first transforming unit is a transformer.

9. The driver circuit of claim 3, wherein the second transforming unit is a transformer.