Testing system and adapter thereof utilizing a common power supply and display device to test different main board circuits

• US 8,648,609 B2
• Filed: 09/10/2010
• Issued: 02/11/2014
• Est. Priority Date: 11/09/2009
• Status: Expired due to Fees

• Current Assignee: Wistron Corporation
• Original Assignee: Wistron Corporation
• Inventors: Shi, Kai-Fu, Xu, Zhen-Wu
• Primary Examiner(s): PATEL, PARESH H
• Application Number:
  US12/879,614
• Publication Number:
  US 20110109322A1
• Time in Patent Office: 1,250 Days
• Field of Search: None
• US Class Current: 324/555
• CPC Class Codes: G01R 31/58 Testing of lines, cables or conductors testing of electric windings G01R31/72
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 2330/04 Display protection
• CPC Class Codes: G09G 3/006 Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: H04N 17/04 for receivers

Abstract

A testing system utilizing a common power supply and a display device to test different types of a main board circuit is disclosed. The testing system includes a power supply device for outputting a predetermined power; a liquid crystal display for receiving a control signal from the main board circuit to perform a testing procedure; and an adapter. The adapter includes a first circuit coupled electrically between the power supply device and the main board circuit for converting the predetermined power into a power needed by the main board circuit, and a second circuit coupled electrically between the main board circuit and the liquid crystal display for converting a control signal generated by the main board circuit into a signal format required to perform the testing procedure on the liquid crystal display.

Claims

1. A testing system utilizing a common power supply and a display device to test different types of a main board circuit, said testing system comprising:

a power supply device for outputting a predetermined power;

a liquid crystal display for receiving a control signal from the main board circuit to perform a testing procedure; and

an adapter including

a first circuit coupled electrically between said power supply device and the main board circuit for converting the predetermined power into a power needed by the main board circuit, and

a second circuit coupled electrically between the main board circuit and said liquid crystal display for converting a control signal generated by the main board circuit into a signal format required to perform the testing procedure on said liquid crystal display.

2. The testing system as claimed in claim 1, wherein said first circuit includes a first input port coupled electrically to said power supply device, a first output port coupled electrically to the main board circuit, and a DC-to-DC with overvoltage protect module bridging said first input port and said first output port, said first input port having a plurality of power pins, said first output port having a plurality of power pins and control pins.

3. The testing system as claimed in claim 2, wherein said first circuit further includes a first level converter and a plurality of electronic switches, input voltages of a first pin and a second pin of said first output port being generated by said electronic switches which are controlled by said first level converter which is in turn controlled by a first control pin using the power from said first input port.

4. The testing system as claimed in claim 3, wherein said first circuit further includes an auto discharge when AC power off module that has a shutdown status identifying circuit, a discharge electronic switch with multiple inputs, and a plurality of discharge resistors, said shutdown status identifying circuit performing discharging through said discharge electronic switch and said discharge resistors when detecting a testing system shutdown.

5. The testing system as claimed in claim 2, wherein said first circuit further includes a first level converter and an electronic switch, power of third and fourth pins of said first output port being obtained by said DC-to-DC with overvoltage protect module converting a predetermined voltage of said pins of said first input port into a power for supply to a third pin of said first input port, and at the same time, a voltage level of said first control pin, which has been converted by said first level converter, controls said electronic switches to generate power for said fourth pin.

6. The testing system as claimed in claim 2, wherein said first circuit further includes a second level converter that is used for converting the predetermined voltage of said first input port, and outputting one of a positive sequence voltage, an inversion voltage, and a control signal having a voltage level different from that of the predetermined voltage, the output being provided to a second control pin of said first input port.

7. The testing system as claimed in claim 1, wherein said second circuit includes a second input port coupled electrically to the main board circuit, a second output port coupled electrically to said liquid crystal display, and an electrostatic discharge protection module bridging said second input port and said second output port, said electrostatic discharge protection module including an input end for receiving an interface control signal, a first diode for pulling up an overly high positive pulse noise of the interface control signal to a predetermined voltage, and a second diode for pulling down a peak negative pulse noise of the interface control signal to a ground voltage level.

8. The testing system as claimed in claim 7, wherein said second circuit further includes an auto adaptive power supply transfer module bridging said second input port and said second output port, said auto adaptive power supply transfer module being used for setting up and outputting an operating voltage that corresponds to a regulated voltage required by said liquid crystal display.

9. The testing system as claimed in claim 1, wherein the signal format complies with a low-voltage differential signaling (LVSD) standard.

10. The testing system as claimed in claim 1, wherein said testing system is used for testing the main board circuit used by said liquid crystal display.

11. An adapter utilizing a common power supply device and a display device to test different types of a main board circuit, said adaptor comprising:

a first circuit coupled electrically between the power supply device and the main board circuit to be tested, said first circuit including a first input port coupled electrically to the power supply device and a first output port coupled electrically to the main board circuit for converting a predetermined power generated by the power supply device into a power needed by the main board circuit; and

a second circuit coupled electrically between the main board circuit and the display device, said second circuit including a second input port coupled electrically to the main board circuit and a second output port coupled electrically to the display device for converting a control signal generated by the main board circuit into a signal format required to perform the testing procedure on the display device.

12. The adaptor as claimed in claim 11, wherein said first circuit further includes a DC-to-DC with overvoltage protect module bridging said first input port and said first output port, said DC-to-DC with overvoltage protect module including a DC-to-DC conversion portion and an overvoltage protection portion, said DC-to-DC conversion portion converting a first voltage loaded by said first input port into a second voltage to be used by a microprocessor of the main board circuit, said overvoltage protection portion being used for automatically disconnecting the power supply of the second voltage to render the output of the second voltage to be 0 volts when the second voltage is higher than a predetermined voltage.

13. The adaptor as claimed in claim 11, wherein said first circuit further includes a first level converter and a plurality of electronic switches interposed between said first input port and said first output port, said first output port having a first control pin for generating a system on voltage level, said first level converter being used to convert the system on voltage level of said first control pin and controlling the on and off states of said electronic switches to output the converted voltage level to said first output port.

14. The adaptor as claimed in claim 11, wherein said first circuit further includes an auto discharge when AC power off module that has a shutdown status identifying circuit, a discharge electronic switch with multiple inputs, and an a plurality of discharge resistors, said shutdown status identifying circuit performing discharging through said discharge electronic switch and said discharge resistors when detecting a testing system shutdown.

15. The adaptor as claimed in claim 11, wherein said first circuit further includes a second level converter that is used for converting the predetermined voltage of said first input port, and outputting one of a positive sequence voltage, an inversion voltage, and a control signal having a voltage level different from that of the predetermined voltage, the output being provided to a second control pin of said first output port.

16. The adaptor as claimed in claim 11, wherein said second circuit further includes an electrostatic discharge protection module bridging said second input port and said second output port, said electrostatic discharge protection module including an input end for receiving an interface control signal, a first diode for pulling up an overly high positive pulse noise of the interface control signal to a predetermined voltage, and a second diode for pulling down a peak negative pulse noise of the interface control signal to a ground voltage level.

17. The adaptor as claimed in claim 11, wherein said second circuit further includes an auto adaptive power supply transfer module bridging said second input port and said second output port, said auto adaptive power supply transfer module being used for setting up and outputting an operating voltage that corresponds to a regulated voltage required by the display device.

18. An adapter utilizing a common power supply device and a display device to test different types of a main board circuit, an output voltage of the main board circuit being a first voltage or a second voltage, the display device requiring the first voltage, said adaptor comprising:

a second input port coupled electrically to the main board circuit;

a second output port coupled electrically to the display device; and

an auto adaptive power supply transfer module including

a main board power input end for receiving one of the first voltage and the second voltage from said second input port,

an identifying circuit for outputting a low-level voltage when detecting the first voltage, and outputting a high-level voltage when detecting the second voltage,

a panel power output end coupled electrically to said second output port,

a negative sequence module for converting the high-level voltage and the low-level voltage to a low-level voltage and a high-level voltage, respectively,

a first voltage switch coupled electrically to said identifying circuit, said negative sequence module, and said panel power output end for switching on when receiving a high-level voltage and switching off when receiving a low-level voltage,

a direct current voltage converting module coupled electrically between said main board power input end and said panel power output end,

a second voltage switch coupled electrically between said identifying circuit and said direct current voltage converting module for switching on when receiving a high-level voltage and for switching off when receiving a low-level voltage, and

a setup unit disposed between said first voltage switch and said second voltage switch, such that, when said setup unit is disposed in a first position for outputting a high resistance, said main board power input end is controlled to provide the first voltage and to convert and output a low-level voltage through said identifying circuit for subsequent conversion to a high-level voltage through said negative sequence module, and a low-level voltage not passed through said negative sequence module turns off the second voltage switch, and when said setup unit is disposed in a second position for a grounded output, said main board power input end is controlled to provide the second voltage and to convert and output a high-level voltage through said identifying circuit for subsequent conversion to a low-level voltage through said negative sequence module, and a high-level voltage not passed through said negative sequence module turns on the second voltage switch and is subsequently output to said panel power output end.

19. The adaptor as claimed in claim 18, wherein said auto adaptive power supply transfer module further includes:

an external power input end coupled electrically to said second input port for receiving a third voltage; and

an external switch coupled electrically among said external power input end, said main board power input end, and said panel power output end to be turned on when receiving a high-level voltage and to be turned off when receiving a low-level voltage;

wherein, when said setup unit is disposed in the second position with a grounded output, said first voltage switch and said second voltage switch are both turned off and said external switch is turned on.