JPH01305420A - Character display device - Google Patents

Abstract

PURPOSE:To surely display the fault of a CPU when the fault occurs in the CPU by providing the source of data representing a faulty state provided sepa rately from the CPU. CONSTITUTION:In an ordinary operation, the output of the CPU 1 is selected and displayed by a selection part 4 as a character display displaying signal. Meanwhile, when the fault of the CPU is detected by a CPU fault detecting part 3, the fault detecting part 3 controls the selection part 4 so as to select the output of a fixed display generating part 2 as the displaying signal to be sent to a driving part 5. In such a way, fixed display data representing the fault of the CPU is displayed on a character display part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is applied to a display device. In particular, the present invention relates to means for automatically switching to a fixed display indicating the failure of the driving CPU.

〔overview〕

The present invention proactively detects failure conditions by providing a generation source of data indicating the failure status that is provided separately from the CPU in the status display means at the time of failure of the CPU that generates data to be displayed on the character display section. It is made so that it can be displayed.

[Conventional technology]

In the conventional example, as shown in FIG. 2, the output of the CPU is directly input to the drive section 5 to drive the character display section 6.

[Problem that the invention seeks to solve]

In such conventional examples, character display is performed only by data generated by the CPU, so the CPU
There is a drawback that the displayed content becomes abnormal (for example, no display) when a U failure occurs.

The present invention aims to eliminate such drawbacks and provides a character display device that proactively displays this state when a CPU failure occurs.

[Means for solving problems]

The present invention provides a CPU that generates character data, a drive unit that generates a character display drive signal corresponding to the character data, a character display unit that displays characters corresponding to the character display drive signal, and a CPU that generates character data. a CPU failure detection unit that detects the presence or absence of a failure; a fixed display generation unit that generates predetermined character data related to the failure; The present invention is characterized by comprising a selection section that supplies the character data generated by the fixed display generation section to the driving section.

[Effect]

When a CPU that generates data for a character display has a failure, this CPU failure is detected, and display data from the normal CPU is switched to fixed display data indicating the CPU failure and displayed on the character display section.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings. 1st
The figure is a block configuration diagram showing the configuration of this embodiment.

As shown in FIG. 1, this embodiment includes a CPU that generates character data, a drive unit 5 that generates a character display drive signal corresponding to the character data,
A character display section 6 that displays characters corresponding to this character display driving signal, a CPU failure detection section 3 that detects whether or not there is a failure in the CPU 1, and a fixed display generation section that generates predetermined character data related to the failure. 2, and the CPU according to the detection output of this CPU failure detection section.
A selection section 4 is provided for supplying character data generated by the fixed display generation section 2 to the drive section 5 in place of the character data generated by the fixed display generation section 2.

Next, the operation of this embodiment will be explained.

As a normal character display display signal, the CPU
1 output is selected by the selection unit 4. When a CPU failure is detected by the CPU failure detection section 3, the output of the fixed display generation section 2 is selected by the selection section 4 as the display signal sent to the drive section 5. The driving section 5 drives the character display section 6 based on the input signal.

〔Effect of the invention〕

As described above, the present invention switches the character display display signal from the CPU output to the fixed display signal generator output in the event of a CPU failure, and therefore has the effect of reliably displaying the CPU failure in the event of a CPU failure.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block configuration diagram showing the configuration of a conventional example. 1...CPU, 2...Fixed display generator, 3...C
PU failure detection unit, 4... selection unit, 5... drive unit, 6
...Character display section.

Claims (1)

[Claims] 1. A CPU (1) that generates character data, a drive unit (5) that generates a character display drive signal corresponding to the character data, and a character display drive signal that generates a character corresponding to the character display drive signal. In a character display device comprising a character display section (6) for displaying a character, the above-mentioned C.
A CPU failure detection unit (3) that detects the presence or absence of a failure in the PU; a fixed display generation unit (2) that generates predetermined character data related to the failure; A character display device comprising: a selection section (4) for supplying character data generated by the fixed display generation section to the drive section in place of the generated character data.