JPS6230336Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a channel display device for a television receiver or the like.

FIG. 1a shows a schematic cross-sectional view of a conventional channel display device. Indicator lamp 1 in Figure 1
The emitted light 2 passes through the channel display characters 6 drawn on the channel display board 7, and the channel display characters 6 are displayed as shown in FIG. 1b. In a portion of the channel display board 7 other than the channel display characters 6, the light 2 hits the light shielding film 7a and is reflected, and the reflected light 4 reaches a reflection plate 8 installed at the rear of the channel display board 7. However, in the conventional channel display device, since the shape of the reflector 8 is conical,
The reflected light 4 that is not reflected in the direction of the channel display board 7 but is reflected by the channel display board 7 hardly contributes to illumination of the channel display characters 6.

The purpose of the present invention is to eliminate the drawbacks of the prior art described above, to efficiently utilize reflected light, to improve the illumination efficiency of channel display characters, and to provide a channel display device with less difference in illuminance between the center and peripheral parts of the display characters. It is about providing.

In order to achieve the above object, in the present invention, the reflector is formed into a truss-like shape, and in particular, the rasp-like curved surface is formed in a substantially exponential shape in cross section. The light emitted from the indicator lamp and reflected by the light-shielding film of the channel display board is reflected on a reflecting plate formed in a substantially exponential shape and irradiated onto the channel display board again, thereby improving the illuminance of the channel display characters. At the same time, the reflected light from the channel display board is further diffused to the periphery to improve the illuminance at the periphery of the channel display characters.

An embodiment of the present invention will be specifically described using FIGS. 2 and 3. In the channel display device according to the present invention, a reflector plate 9 having a substantially exponential cross-sectional shape is installed on the outer periphery of the display lamp 1 attached to a lamp board 10, and is further held in front of the reflector plate 9 by a display plate holder 11. A channel display board 7 is arranged.

Light 2 on the main optical axis emitted from indicator lamp 1
passes directly through the channel display board 7 and is recognized from the front. Further, after the light 3 emitted from the display lamp 1 in the vicinity of the main optical axis reaches the channel display plate 7, only the channel display characters 6 pass through, and the rest is once reflected by the light shielding film 7a onto the reflection plate 9. Here, the light 4 reflected by the reflection plate 9 is further reflected toward the periphery of the channel display plate 7. In this way, the light that has not passed through the channel display board 7 is repeatedly reflected while gradually decreasing between the channel display board 7 and the reflection plate 9, and when it reaches the light passing portion of the channel display board 7, it is irradiated onto the front surface. . Further, the light 5 that tends to leak laterally from the display lamp 1 is reflected by the reflection plate 9, focused on the main optical axis, and illuminates the channel display plate 7.

By making the cross-sectional shape of the reflecting plate 9 substantially exponential in this way, all of the lights 2, 3, and 5 emitted by the display lamp 1 are reflected and diffused, and the channel display characters 6 on the channel display board 7 are bright and Irradiation can be performed with less uneven brightness.

In addition, as shown in FIG. 3, the channel display board 7
This effect can be significantly improved by forming a reflective film 7b on the back surface of the disc except for the channel display characters 6.

As explained above, according to the present invention, the illuminance of the channel display characters is improved by irradiating the reflected light from the channel display board, which has been hardly used in the past, back onto the channel display board via the reflector. Furthermore, it is possible to provide a channel display device that prevents a decrease in illuminance at the periphery of the channel display board, has high character recognition, and has a small difference in illuminance between the center and the periphery.

[Brief explanation of the drawing]

Figures 1a and b are cross-sectional views schematically showing a conventional channel display device, Figure 2 is a cross-sectional view showing an embodiment of a channel display device according to the present invention, and Figure 3 is a channel display in a channel display device according to the present invention. FIG. 3 is a cross-sectional view showing the main parts of the plate. 1...Display lamp, 6...Channel display characters, 7...Channel display board, 9...Reflector plate.

Claims (1)

[Scope of utility model registration request] A channel display device comprising an indicator lamp, a reflector, and a channel display plate on which light-transmitting indicator characters are drawn, and which displays channel display characters on the channel display plate by irradiating the channel display plate with light emitted by the indicator lamp and light emitted by the indicator lamp and reflected by the reflector, characterized in that the reflective surface of the reflector is formed into a substantially exponential shape in cross section.