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CRT display device
| Details |
Inventors: Tashiro, Tsukasa; Hayashi, Shigeo; Miyazaki, Toshiyuki; Sogo, Norihito;
Assignee: Totoku Electric Co., Ltd. (Tokyo, JP); Kaga Electronics Co. Ltd. (Tokyo, JP)
Primary Examiner: Brier; Jeffery
Assistant Examiner:
Attorney, Agent or Firm:
A CRT display device on which an input signal which has been processed can form an image signal which results in an image being displayed. The CRT display device has a separate message section which can be a dot matrix display. On this separate message section there is a display where displayed messages indicative of the input signal. The message display section displays messages related to the input signal even when there is no image on the cathode ray tube of the CRT display device so that a user based on these messages can input parameters to provide an image on the CRT. The messages on the display device can be shown in various languages. |
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DETAILED DESCRIPTION Accordingly, an object of this invention is to provide a CRT display device in which, even when no image is displayed on the CRT, the state of the input signal can be readily detected by the user.
In order to achieve the foregoing object of the invention, a CRT display device in which an input signal is processed to form an image signal, and an image is displayed on a CRT according to the image signal thus formed, according to the invention, comprises: input signal state detecting means for detecting the state of an input signal; message displaying means provided in addition to the CRT; and display control means for displaying a message representing the state of the input signal detected by the input signal state detecting means on the message displaying means.
Preferably, the CRT display device further comprises: display language selecting means, so that the display control means displays the message on the message displaying means in a language selected by the language selecting means.
The term "message representing the state of the input signal" as used herein includes messages as to a horizontal frequency, vertical frequency, and positive and negative polarities.
In the CRT display device of the invention, the display control means operates to display the state of an input signal, in the form of a message, on the message displaying means, which is detected by the input signal state detecting means.
Hence, even when no image is displayed on the CRT, the user can read the message displayed on the message displaying means, to determine why no image is displayed.
More specifically, it can be readily determined which of the following reasons has caused the trouble: no input signal is applied thereto because the CRT display device is insufficiently connected to the personal computer or the like, or an input signal applied to the CRT display device from the personal computer or the like is out of the range of tolerance of the CRT display device, or others.
With the CRT display device of the invention, the user can select a desired language among a plurality of languages with the display language selecting means, so that the message be displayed in the language
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Radio 
