Method and apparatus for automatic performance evaluation of electronic display devices

• US 5,572,444 A
• Filed: 08/08/1994
• Issued: 11/05/1996
• Est. Priority Date: 08/19/1992
• Status: Expired due to Fees

• Current Assignee: MTL Systems, Inc.
• Original Assignee: MTL Systems, Inc.
• Inventors: Harshbarger, John H. Jr., Lentz, Louis F., Shellhause, Michael W.
• Primary Examiner(s): Voeltz, Emanuel T.
• Assistant Examiner(s): PEESO, THOMAS R
• Application Number:
  US08/287,539
• Time in Patent Office: 820 Days
• Field of Search: 364/551.01, 348/181, 348/222, 235/462, 235/471, 382/10, 382/12, 382/17, 382/58, 382/59, 382/65
• US Class Current: 702/117
• CPC Class Codes: G06F 11/34 Recording or statistical evaluation of computer activity, e.g. of down time, of input/output operation ; Recording or statistical evaluation of user activity, e.g. usability assessment
• CPC Class Codes: H04N 17/02 for colour television signals

Abstract

A method and apparatus for evaluating the degradation of a video display device. Single parameter test signals and patterns, generated either internally or externally to the video device, are displayed on the screen. A sensing device such as a CCD camera reads the screen and transmits the data to a processing unit. Codes, imbedded in the test signal or pattern, indicate to the testing device what test is currently being run, the content of the test, and/or the specific setup situation. The code may be inherent in the pattern, the sequencing, or in addition thereto. The processing unit reads and interprets the results in accordance with the received test codes. The apparatus includes a portable, hand-held unit capable of detecting video degradation on a pass/fail basis. The unit is separate from the display under test and is capable of identifying and evaluating the test through the receipt and interpretation of the embedded codes in the test patterns, and evaluating performance on a go/no-go basis.

Claims

1. A method for automatically evaluating the performance of an electronic video display device, said method comprising the steps of:

generating a time sequenced plurality of test stimuli and inputting said test stimuli sequence to the video display device for display of respective test images thereon, said test stimuli sequence defining an embedded code;

providing a processor capable of recognizing said embedded code;

sensing said plurality of test stimuli and outputting signals corresponding thereto to said processor;

analyzing said test stimuli in the sequence defined by said embedded code with said processor, to evaluate the performance of the video display device; and

providing by means of an output device an indication of the performance of the video display device.

2. The method of claim 1, wherein said test stimuli sequence includes a plurality of optical trigger images, each said trigger image indicating a beginning of a predetermined test.

3. The method of claim 1, comprising the further step of programming said processor to determine said embedded code.

4. The method of claim 3, comprising the further step of providing said processor with a programmable card.

5. The method of claim 3, wherein said programming step includes programming said processor to include an applications program corresponding to said embedded code.

6. The method of claim 5, comprising the further step of recording data utilized by said processor, said applications program comparing at least one of said data with a respective said test stimuli to evaluate the performance of the video display device.

7. The method of claim 6, wherein said recording step comprises the step of recording said data in a memory device contained within said processor.

8. The method of claim 5, wherein said embedded code is indicative of current test parameters, said current test parameters represented by at least one predetermined said datum.

9. The method of claim 1, wherein each said test stimuli comprises a single parameter test pattern.

10. The method of claim 1, wherein said providing step comprises providing a visual indication of the performance of the video display device.

11. The method of claim 1, wherein said determining, analyzing and providing steps are carried out using a hand held processor.

12. A system for automatically evaluating the performance of an electronic video display device, comprising:

means for generating test stimuli and inputting said test stimuli to the video display device for display of a test image thereon, said test stimuli including an embedded code indicative of current test parameters; and

means for sensing and processing said test stimuli, dependent on said embedded code, to evaluate the performance of the video display device;

wherein said sensing and processing means is optically connected to said generating means and has an absence of a data connection with said generating means.

13. The system of claim 12, wherein said generating means generates a plurality of test stimuli defining a sequence of test stimuli, said sequence of test stimuli defining an embedded code representing current test parameters.