Test Method for a Screen in a Vehicle

• US 20160217719A1
• Filed: 05/28/2014
• Published: 07/28/2016
• Est. Priority Date: 06/20/2013
• Status: Active Grant

• Current Assignee: Continental Automotive GmbH (Continental AG)
• Original Assignee: Continental Automotive GmbH (Continental AG)
• Inventors: KABATEK, Ulrich, MLLER, Gerhard, SCHMIDT, Reiner, LAHR, Torsten, HOHMANN, Kai
• Granted Patent: US 10,304,363 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2320/029 by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
• CPC Class Codes: G09G 2330/12 Test circuits or failure detection circuits included in a display system, as permanent part thereof
• CPC Class Codes: G09G 2380/10 Automotive applications
• 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 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

In a test method, a screen in a vehicle is actuated in order to generate a specified raster image. An electric current intensity flowing as a result of the actuation is measured, and the measured current intensity is compared with a specified reference current intensity. It is ascertained whether the raster image was generated without errors dependent on the comparison.

Claims

1-13. -13. (canceled)

14. A test method comprising:

actuating a screen (1) in a vehicle to produce a prescribed raster image (RB);

measuring an electrical current intensity (I) flowing as a result of the actuating;

comparing the measured electrical current intensity (I) with a prescribed reference current intensity (IREF); and

ascertaining whether the raster image (RB) has been produced without error based on the comparing.

15. The test method as claimed in claim 14, wherein the electrical current intensity (I) used to supply the screen (1) with current is used in the measuring and is compared with the prescribed reference current intensity (IREF) in the comparing.

16. The test method as claimed in claim 14, wherein the electrical current intensity (I) flowing at a driver stage of the screen (1) is used in the measuring and is compared with the prescribed reference current intensity (IREF) in the comparing.

17. The test method as claimed in claim 14, wherein the electrical current intensity (I) flowing for charging at least one pixel of the screen (1) is used in the measuring and is compared with the prescribed reference current intensity (IREF) in the comparing.

18. The test method as claimed in claim 14, in which the screen (1) is a luminescent screen.

19. The test method as claimed in claim 14, in which the screen (1) is a TFT liquid crystal screen.

20. The test method as claimed in claim 19, wherein the screen (1) has a backlight and the actuating is effected with the backlight not switched on.

21. The test method as claimed in claim 14, wherein the actuating is effected in response to a switching on of the screen (1).

22. The test method as claimed in claim 14, wherein the reference current intensity (IREF) is ascertained based on data from a graphics memory.

23. The test method as claimed in claim 14, wherein the electrical current intensity (I) used to supply a hidden point on the screen (1) with current is used in the measuring.

24. A test method according to claim 14 in which testing is performed with different prescribed raster images (RB) and respectively associated reference current intensities (IREF).

25. The test method as claimed in claim 24, wherein the different prescribed raster images (RB) are produced at a prescribed frequency in succession that is greater than or equal to 20 Hz.

26. A test apparatus (TV), wherein the test apparatus (TV) is configured to carry out a test method as claimed in claim 14.