Portable universal video/audio computer tester

• US 5,991,805 A
• Filed: 07/16/1996
• Issued: 11/23/1999
• Est. Priority Date: 07/16/1996
• Status: Expired due to Fees

• Current Assignee: Yuri Krukovsky
• Original Assignee: Yuri Krukovsky
• Inventors: Krukovsky, Yuri
• Primary Examiner(s): Ramirez, Ellis B.
• Application Number:
  US08/682,989
• Time in Patent Office: 1,225 Days
• Field of Search: 395/200.11, 395/183.22, 395/183.2, 348/189, 348/185, 371/20.1, 371/22.6, 371/21.1
• US Class Current: 709/223
• 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 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04

Abstract

A portable, universal video and audio computer tester has a video section including a pluggable video connector for connecting to an external source of a video signal; a video detector for detecting an input RGB video signal; a video indicator for signaling presence of an input RGB video signal; a synch detector for detecting an input video synchronization signal; and, synch indicating means for signaling presence of a and input horizontal and a vertical synchronization signal. An audio section has pluggable audio connectors; an internal audio generator for creating an output audio signal; an audio indicator for signaling presence of an input audio signal from the external source or from the internal audio generator; a switch for changing an operational mode from an input audio signal to an output audio signal. Connection to either an external or internal power supply is provided. Operations of video computer interfaces and audio computer interfaces can be verified by connection to the video connector and to the audio connector, respectively.

Claims

1. A portable, analog, video computer tester for testing a video computer interface, having a unitary housing and comprising:

directy pluggable video connection means providing cable-free connection to an external source of a video signal;

video detection means connected to the video connection means for detecting separate components of a RGB video signal input into the connection means;

video indicating means connected to the video detection means for signaling presence of separate components of a RGB video signal detected by the video detection means;

synch test circuit means connected to the video connection means for testing and indicating presence of separate components of a video synchronization signal input into the connection means; and

,

means for connecting to one ot an external power supply and an internal power supply,

so that operation of a video computer interface can be verified by connection thereof to the video connection means.

4. A portable tester according to claim 1 wherein the synch test circuit means further comprises a horizontal and vertical selector of a synch-on-green composite synchronization signal and a horizontal and vertical selector of a composite synchronization signal and a synch indicating means for signaling presence of a horizontal and a vertical synchronization signal.

6. A tester according to claim 1 wherein the video connection means includes standard IBM and Apple connectors connected to common video test circuitry.

10. A tester according to claim 6 wherein video circuitry is powered on through ground pins of the video connectors and a ground of the external device.

12. A portable tester according to claim 1 wherein the video indicating means and the synch test circuit means for indicating presence of separate components of a video synchronization signal comprise respective LED.

2. A portable, analog, audio computer tester for testing an audio computer interface and peripheral audio devices, having a unitary housing and comprising:

directly pluggable audio connection means providing cable-free connection to a source of an audio signal;

internal audio generating means for creating an output audio signal;

audio indicating means connected to the audio connection means for signaling presence of an audio signal input to the connection means from one of the external source and the internal generating means;

means connected to the audio connection means and the audio generating means for changing an operational mode thereof from an input audio signal to an output audio signal; and

,

means for connecting to one of an external power supply and an internal power supply,

so that operation of an audio computer interface can be verified by connection thereof to the audio connection means.

8. A tester according to claim 2 wherein the audio connection means includes a standard audio plug and audio socket connected to common audio test circuitry.

14. A portable tester according to claim 2 wherein the audio indicating means comprises a LED.

3. A portable, analog, video and audio computer tester for testing video and audio computer interface and audio peripheral devices, having a unitary housing and comprising:

directly pluggable video connection means providing cable-free connection to an external source of a video signal;

video detection means connected to the video connection means for detecting separate components of a RGB video signal input into the connection means;

video indicating means connected to the video detection means for signaling presence of separate components of a RGB video signal detected by the video detection means;

synch test circuit means connected to the video connection means for testing and indicating presence of separate components of a video synchronization signal input into the connection means; and

,

directly pluggable audio connection means providing cable-free connection to a source of an audio signal;

internal audio generating means for creating an output audio signal;

audio indicating means connected to the audio connection means for signaling presence of an audio signal input to the connection means from one of the external source and the internal generating means;

means connected to the audio connection means and the audio generating means for changing an operational mode thereof from an input audio signal to an output audio signal; and

,

means for connecting to one of an external power supply and an internal power supply,

so that respective operations of video computer interfaces and audio computer interfaces can be verified by connection thereof to the video connection means and to the audio connection means, respectively.

5. A portable tester according to claim 3 wherein the synch test circuit means further comprises a horizontal and vertical selector of a synch-on-green composite synchronization signal and a horizontal and vertical selector of a composite synchronization signal and a synch indicating means for signaling presence of a horizontal and a vertical synchronization signal.

7. A tester according to claim 3 wherein the video connection means includes standard IBM and Apple connectors connected to common video test circuitry.

9. A tester according to claim 3 wherein the audio connection means includes a standard audio plug and audio socket connected to common audio test circuitry.

11. A tester according to claim 7 wherein video circuitry is powered on through ground pins of the video connectors and a ground of the external device.

13. A portable tester according to claim 3 wherein the video indicating means and the synch test circuit means for indicating presence of separate components of a video synchronization signal comprise respective LED.