Screen protection method for image display apparatus

• US 6,667,693 B1
• Filed: 12/30/1999
• Issued: 12/23/2003
• Est. Priority Date: 12/31/1998
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Dong Hyeon, Lee, Hyung Il
• Primary Examiner(s): Crosland, Donnie L.
• Application Number:
  US09/475,129
• Time in Patent Office: 1,454 Days
• Field of Search: 340/815.4, 340/525, 340/461, 345/115-117, 345/672, 345/682, 348/563, 348/569, 348/564, 348/173, 725/33, 725/32
• US Class Current: 340/815.4
• CPC Class Codes: H04N 21/4424 Monitoring of the internal components or processes of the client device, e.g. CPU or memory load, processing speed, timer, counter or percentage of the hard disk space used error monitoring in general G06F11/30; arrangements for monitoring conditions of receiving stations in broadcast systems H04H60/32; diagnosis, testing or measuring for television receivers H04N17/04
• CPC Class Codes: H04N 21/4882 for displaying messages, e.g. warnings, reminders arrangements for providing short real-time information to substation in data switching networks H04L12/1895
• CPC Class Codes: H04N 5/445 for displaying additional information H04N5/50 takes precedence
• CPC Class Codes: H04N 5/68 Circuit details for cathode-ray display tubes deviation circuits H04N3/16
• CPC Class Codes: H04N 5/7408 Direct viewing projectors, e.g. an image displayed on a video CRT or LCD display being projected on a screen

Abstract

A technique for protecting a screen surface from being damaged due to a fixed display operation of an image display apparatus such as a projection TV. The method includes a first step for displaying an alarm message for informing no external signal input in the mode in which an external signal is inputted, a second step for checking whether an external signal is inputted in the state that the first step is being performed and the mode is changed, and a third step for checking whether the alarm message display time of the first step becomes identical with a set display time and displaying an alarm message when the time exceeds the set time and dynamically displaying a random format graphic or character.

Claims

1. A screen protection method, which comprises:

providing an image display apparatus of a projection screen TV;

displaying a fixed alarm message at a certain portion of a projection screen; and

randomly changing a display position of the fixed alarm message and displaying the fixed alarm message when a fixed alarm message display time elapses a set time.

2. The method of claim 1, wherein said alarm message is an alarm message informing that there is not an external input signal.

3. The method of claim 2, wherein said alarm message output is stopped when an external signal is inputted after the alarm message is displayed or the mode is changed.

4. The method of claim 1, wherein said alarm message is a character or a graphic.

5. The method of claim 1, wherein a display position of the alarm message is changed in a horizontal direction or a vertical direction.

6. The method of claim 1, wherein a display position of the alarm message is changed in a diagonal direction or a scanning direction.

7. A screen protection method, which comprises:

providing an image display apparatus of a projection screen TV;

displaying an alarm message at a certain portion of a projection screen; and

randomly changing a display position of the alarm message at a certain period and displaying the alarm message.

8. The method of claim 7, wherein said alarm message is an alarm message informing that there is not an external input signal.

9. The method of claim 8, wherein said alarm message output is stopped when an external signal is inputted after the alarm message is displayed or the mode is changed.

10. The method of claim 7, wherein said alarm message is a character or a graphic.

11. The method of claim 7, wherein a display position of the alarm message is changed in a horizontal direction or a vertical direction.

12. The method of claim 7, wherein a display position of the alarm message is changed in a diagonal direction or a scanning direction.

13. A screen protection method, which comprises:

providing an image display apparatus;

displaying a fixed alarm message at a certain portion of a TV projection screen; and

randomly changing a display position of the fixed alarm message and displaying the alarm message when a fixed alarm message display time elapses a set time.

14. A screen protection method for an image display apparatus, comprising the steps of:

displaying an alarm message at a certain portion of a TV projection screen; and

randomly changing a display position of the alarm message at a certain period and displaying the alarm message.

15. A screen protection method, which comprises:

providing an image display apparatus of a projection screen TV;

displaying a fixed alarm message at a certain portion of a projection screen; and

changing a fixed alarm message and a display position of the same when a fixed alarm message display time elapses a set time and displaying the fixed alarm message, wherein the display position of the fixed alarm message is randomly changed.

16. A screen protection method, which comprises:

providing an image display apparatus of a projection screen TV;

displaying an alarm message at a certain portion of a projection screen; and

changing the alarm message and a display position of the same at a certain period and displaying the alarm message, wherein the display position of the fixed alarm message is randomly changed.