| 摘要 |
PURPOSE:To display much volume of information with a small number of lamps by a method wherein an abnormal condition sensing change-over switch for sensing a presence or absence of abnormal condition and changing-over the content of display is arranged in a light emitting diode circuit for use in displaying information. CONSTITUTION:A micro-computer program has an abnormal condition sensing and change-over switch 50. When the switch 50 detects a presence or absence of abnormal condition to find that the abnormal condition is not present after starting of operation, an operation for displaying the desired content is caused to perform in a group of diodes 41a. In turn, in case that the abnormal condition is found, it is displayed in the group of diodes 41a. The display plate 20a acting as a display plane is provided with a time display tube 23, temperature conditioning and the operation condition display diode 41a and a lamp 21a for restricting the operation. In this way, the number of diodes can be decreased and a convenient and less expensive unit can be attained. |
