JPS61256874A - Display device - Google Patents

Abstract

PURPOSE:To inexpensively obtain a display device having a green color or an umber color by providing a colored transparent color filter and a transparent smoke plate at the front plane of the display part of a cathode ray tube having a white color displaying. CONSTITUTION:A cathode ray tube 2 having the white color displaying to which a circuit 3 is connected and a back cover 4 are mounted on a grill 1 which provides a window at a displaying area and a plate-shaped color filter 6 which is made of an orange colored transparent acryl resin and a smoke plate 7 which is made of a transparent acryl resin are fitted in such a way that they can freely be loaded and unloaded. A picture image which is displayed on the displaying area of the cathode ray tube 2 can be seen as the orange colored picture near an umber colored one through the color filter 6.

Description

[Detailed description of the invention] Industrial applications This invention is a computer, a word processor.

The present invention relates to a display device used for displaying data on a data terminal or the like.

Prior Art A conventional display device of this type had a structure as shown in FIG.

That is, a cathode ray tube 2 is attached to the grill 1, and a circuit 3 is connected to it.
are connected and covered with a back cover 4 from the rear. Here, 6 is a knob for adjusting the brightness of the display section.

Problems to be Solved by the Invention However, with this type of structure, when manufacturing several types of display devices with different display colors, the cathode ray tube itself must be changed depending on the display color, making management at the component stage inconvenient. be.

In addition, the current display colors are generally white, green, and amber, but green cathode ray tubes are more expensive than white cathode ray tubes, and amber cathode ray tubes are more expensive than white cathode ray tubes. They are more expensive than colored cathode ray tubes, and there is a very close difference when compared to white ones.

Therefore, the present invention makes it possible to produce a display device with different display colors using an inexpensive cathode ray tube with a white display and a simple configuration.

The means for solving the problem and the technical means of the present invention for solving the problem are as follows:
A colored transparent color filter is provided in front of the display section of the above-mentioned white display cathode ray tube, and a transparent smoke plate is further provided in front of the color filter.

action The effect of this technical means is as follows.

That is, what is displayed in white on the display section of a cathode ray tube appears to be colored in the color of the color filter when it passes through a color filter. However, if only a color filter is used, not only the shining parts but also the background will appear colored, so by passing the smoke plate through, the non-shining background parts will be darkened and only the shining parts will be visible. Make it stand out.

As a result, even though the cathode ray tube displays white and is inexpensive, it is possible to display any desired color by changing the color of the color filter.

In addition, parts can be managed simply by managing flat color filters by color, and assembly workers can also directly recognize the type of display color by color.

EMBODIMENT Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In Fig. 1, reference numeral 1 denotes a grill with a window in the display area, and a cathode ray tube 2 with a white display connected to a circuit 3 and a back cover 4 are attached to this grill 1, and an orange color A plate-shaped color filter 6 made of transparent acrylic resin and a smoke plate made of transparent smoked acrylic resin are removably fitted in this order.

When the image displayed in the display area of the cathode ray tube 2 is viewed through the color filter 6, it becomes orange close to amber. However, if only the color filter 6 is used, the reflected light from the surface of the color filter 6 in response to external light will be directly visible to the user's eyes, and even the undisplayed portions of the display area will appear orange.

Therefore, by providing a smoke plate 7 in front of the color filter 6, it is possible to cut the reflected light from the color filter 6 and make only the displayed image appear orange.

Next, other embodiments of the present invention will be described.

FIG. 2 shows a second embodiment of the present invention. In this embodiment, by attaching the smoke plate 7 to the grill 1 so as to be openable and closable, the color filter 6 can be attached and detached to suit the user's preference. The display color can be easily changed by using a color filter made of green transparent acrylic resin instead of the orange color filter to create a green display device. FIG. 3 shows a third embodiment of the present invention, and like the second embodiment, the display color can be easily changed according to the user's preference, but this is different from the smoke color. A plate T is fixed to a grill 1, and a color filter 6 can be freely attached and detached through a slit-like hole provided on the side surface of the grill 1.

Effects of the Invention As described above, in the present invention, a colored and transparent color filter and a transparent smoke plate are stacked in this order on the front of the display section of a cathode ray tube displaying white. Only images displayed in white can be viewed by being colored with the color of the color filter, and a display device capable of displaying green or amber colors can be provided at low cost.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a display device according to a first embodiment of the present invention, FIG. 2 is a perspective view of a display device according to a second embodiment of the present invention,
FIG. 3 is a sectional view of a display device according to a third embodiment of the present invention, and FIG. 4 is an exploded perspective view of a conventional display device. 1...Grill, 2...Cathode ray tube, 6.
...Color filter, 7...Smoke board.

Claims (2)

[Claims] (1) A cathode ray tube that displays characters, figures, etc. in white, a black transparent smoke plate installed in front of the display area of the cathode ray tube, and a smoke plate provided between the display area of the cathode ray tube and the smoke plate. A display device characterized by having a colored transparent color filter. (2) A display device according to claim 1, characterized in that a color filter is detachably provided between the display area of the cathode ray tube and the smoke plate.