Composite fluorescent display apparatus

DETAILED DESCRIPTION Therefore, the present invention is intended to eliminate the above-mentioned disadvantages of the prior art.
It is an object of the present invention to provide a composite fluorescent display apparatus which is light in weight, excellent in appearance, and capable of effecting different types of display in one display apparatus.
It is another object of the present invention to provide a composite fluorescent display apparatus which permits ratio of space occupied by display patterns to overall dimensions of a substrate to be improved remarkably.
It is further object of the present invention to provide a composite fluorescent display apparatus which is capable of effecting display which is easy to observe from a wide viewing angle without accompanying any viewing distortion of the indicator elements.
It is still another object of the present invention to provide a composite fluorescent display apparatus which is easy to manufacture, reliable in its operation, and simplifies various processes required for forming the display apparatus in a great deal, thereby to improve the production efficiency and to reduce the manufacturing costs of the apparatus.
The foregoing and other objects are attained in accordance with an aspect of the present invention through the provision of a composite fluorescent display apparatus of the type which permits the display to be observed through a transparent substrate made of an insulating material on which pattern display portions for effecting different types of display are arranged.
The pattern display portions are divided into several groups, each of which is hermetically sealed by an independent back cover.