JPH07219463A - Lighting system of display panel section - Google Patents

Abstract

PURPOSE:To provide a lighting system of a display panel section capable of improving the light effect of display sections with LED elements without requiring electrical and mechanical changes. CONSTITUTION:LED elements 6 are used as the lighting source of a display panel section in this lighting system of the display panel section. The LED elements 6 are fitted on a wiring board 7 at the positions corresponding to display sections 2 of the display panel section, and the silk printing 9 for attaining a light reflecting action is applied on the wiring board 7 around the fitting faces of the LED elements 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to electronic equipment such as VHs.
The present invention relates to an illuminating device for illuminating a display panel of a so-called double-deck type video recording device that is integrally provided with an S (registered trademark) VCR and an 8 mm VCR, and in particular, the illuminance of the display panel section can be adjusted to a current value. The present invention relates to a lighting device that can be improved without increasing it.

[0002]

2. Description of the Related Art Conventionally, an LED element (light emitting diode) is generally used as a light source for illuminating a display panel of a video recording apparatus of this type. The current applied to the LED element is about 10 mA, but the display state of the display panel may not be determined if the light emitting efficiency (brightness) of the LED element is low. In addition, in order to increase the illuminance of the LED element, a larger amount of current may flow depending on the case.

As an example, as a method for driving an LED element, a microcomputer (microcomputer) directly outputs L
When driving an ED element, it is not possible to emit many LED elements at one time because the control current of the microcomputer itself is extremely small, and because the microcomputer does not cause the influence of heat generation etc. It is preferable from the viewpoint of safety of the microcomputer itself to drive the LED element by using the switch circuit.

[0004]

However, the use of a switch circuit such as a digital TV has a problem that the number of parts is large because an electronic part such as a transistor and a resistor is used, and a large amount of current flows through the LED element. Since it flows, there is a problem that the life of the LED element is shortened accordingly.

Further, as a method for mechanically increasing the illumination efficiency of the display panel section at a constant current value, a member such as a table is interposed between the LED element and its mounting substrate to bring the LED element closer to the display panel section. However, in this case, there is a problem in that the number of parts increases and the number of manufacturing steps increases.

The present invention has been made to solve the above-mentioned problems, and improves the illumination efficiency of the display panel section by the LED elements without requiring electrical and mechanical changes. It is an object of the present invention to obtain a lighting device for a display panel unit that can be manufactured.

[0007]

In order to achieve the above object, a lighting device for a display panel unit according to the present invention is a lighting device for a display panel unit, which uses an LED element 6 as a light source for illuminating the display panel unit. Each display section of the display panel 2,
The LED element 6 is supported and mounted on the wiring board 7 at a position corresponding to 3, and the light reflecting member 9 (silk printing) is formed on the wiring board 7 around the LED element 7 mounting surface.

The display panel illuminator according to a preferred embodiment of the present invention is a wiring board 7 which is silk-printed 9 as a light reflecting member.

Further, in the illuminating device for the display panel section according to the preferred embodiment of the present invention, the silk printing 9 is composed of the mesh-shaped printing surface 9b, and the light from the LED element 6 is diffused.

[0010]

In the illumination device for the display panel section of the present invention configured as described above, the light from the LED element 6 directly illuminates the display sections 2 and 3, and a part of the light from the LED element 6 is not emitted. The light reflecting member 9 is reflected to illuminate the display units 2 and 3. As a result, even if the current supplied to the LED element 6 is about the same as in the conventional case, the amount of illumination to the display units 2 and 3 is increased and the display units 2 and 3 can be illuminated more brightly.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a display panel illuminating device according to the present invention will be described below with reference to the drawings by taking a display panel of a double-deck type video recording device in which a VHS deck and an 8 mm video deck are integrated. To do.

FIG. 1 is a front view of a display panel section of the video recording apparatus of this embodiment, FIG. 2 is an enlarged cross-sectional view of an essential part of the present invention, and FIG.
It is a top view of silk printing of an ED element and its periphery.

In FIG. 1, reference numeral 1 is a main body of the video recorder, and a display panel 2 on the side of the VHS video deck is provided at the center of the front panel of the main body 1 of the deck.
And a display panel section 3 on the side of the 8 mm video deck.

Now, description will be given of each mode display of the tape running on the display panel section 2 on the VHS video deck side. 2a is a display section which is turned on when the VHS video deck is operating, and 2b is dubbing from the VHS side to 8 mm side. Editing direction display section, 2c tape return display section, 2d playback display section, 2e tape feed display section, 2f pause display section, 2
Reference numeral g is a recording display portion, 2h is a reserved recording display portion, and 2i is a cassette mark display portion. Incidentally, 4 is a window for inserting the VHS cassette into the deck.

Further, description will be given of each mode display of the tape running of the display section 3 on the side of the 8 mm video deck.
b is a display unit for the dubbing editing direction from the 8 mm side to the VHS side, 3c is a tape return display unit, 3d is a reproduction display unit, and 3e.
Is a tape feed display portion, 3f is a pause display portion, 3g is a recording display portion, 3h is a HI8 display portion, 3i is a cassette mark display portion, 3j is a reserved recording display portion. In addition, 5 is an insertion window into the deck of the 8 mm cassette.

The above-mentioned respective display sections 2 and 3 are brightly illuminated by the light emission of the LED element 6 which will be the light source described later when the corresponding display section is in the tape running mode, and the user can recognize the difference in the brightness of the display section. You can

The LED element 6 is composed of a light emitting diode as an example, and one LED element 6 is arranged corresponding to each of the above-mentioned display portions.

The support structure of the LED element 6 in the mechanical deck body 1 will be described below with reference to a sectional view taken along the line AA in FIG. 1. The LED element 6 is electrically and mechanically mounted on the wiring board 7. The display units 2a, 2c, 2f, 2h are attached and correspond to the front of each LED element 6. still,
The wiring board 7 is provided with electrical wiring and electronic parts (not shown) on the back surface side where the LED elements 6 are not supported, and L
The mounting surface of the ED element 6 is a flat surface. Further, each LED element 6 is partitioned by a partition plate 8 having a length reaching the corresponding display portion so that light from the LED element 6 does not leak to the outside.

Then, a light reflecting member which is an essential part of the present invention is formed on the wiring board 7 around the mounting surface of the LED element 6 by a method such as printing. This light reflecting member is formed, for example, by silk printing 9 using an ink made of particles of metal or the like having good reflectivity. That is, the light from the LED element 6 due to the formation of the silk printing 9 is reflected by the direct light L illuminating the display portion directly from the LED element 6 and the silk printing 9 surface from the LED element 6 as shown in FIG. It is possible to illuminate the display unit with the reflected light L ₁ , so that even if the amount of light emitted from the LED element 6 is constant, the amount of illumination light that illuminates the display unit is large, and the display unit can be illuminated even brighter.

FIGS. 4a, 4b and 4c are plan views of the LED element 6 and the silk print 9. FIG. 4a shows a state in which the silk print is rectangular solid print 9a (smooth print surface). 4b shows a state in which the silk printing is performed in a square shape by mesh printing 9b, and FIG. 4c shows a state in which the silk printing is performed in a circular shape by finer mesh printing 9c than in the case of FIG. 4b.

In the case of the solid printing 9a shown in FIG. 4a, the light from the LED element 6 can totally reflect the surface of the solid printing 9a to illuminate the display portion, and the mesh printing 9 shown in FIGS. 4b and 4c.
In the case of b and 9c, the light from the LED element 6 is diffused on the concave and convex mesh printed surfaces 9b and 9c so that the entire display portion can be uniformly illuminated.

The silk printing 9 described above is the wiring board 7
Since the silk printing process can be performed during the molding step, the step required for silk printing can be extremely shortened.

In general, the light emission color of an LED element looks different depending on how it is viewed, such as when it is yellow or green and when it is red. It is also possible to perform the silk printing of the invention to adjust the balance of the brightness of the display section.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

In the embodiment, the case where the light reflecting member is formed by silk printing has been described. However, other than silk printing, the light reflecting material may be printed in a film shape or a film shape may be adhered to the above-mentioned material. The same effect as that of the embodiment can be obtained.

The embodiment of the lighting device for the display panel has been described by taking the display panel of the double-deck type video recording device in which the VHS deck and the 8 mm video deck are integrated as an example. It is also widely applicable to panel lighting devices.

[0027]

As described above, the illuminating device for the display panel section according to the present invention corresponds to the display section of the display panel in the illuminating apparatus for the display panel section using the LED element as the light source for illuminating the display panel section. The LED element is supported and mounted on the wiring board at the position where the LED element is mounted, and the light reflecting member is formed on the wiring board around the LED element mounting surface. There is an effect that the amount of illumination light for illuminating is increased and the display unit can be illuminated more brightly.

Further, since the light reflecting member can be formed by a method such as printing during the molding process of the wiring board, the number of parts can be reduced and the manufacturing process of the lighting device can be reduced.

Further, since the amount of light emitted from the LED element itself is not increased, the power consumption required for the LED element is small, and as a result, the life of the LED element can be greatly improved.

[Brief description of drawings]

FIG. 1 is a front view of a display panel section of this example.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory diagram of LED elements and silk printing.

FIG. 4 is a plan view of an LED element and each example of silk printing.

[Explanation of symbols]

 1 Mechanical deck main body 2, 3 Display 6 LED element 7 Wiring board 9 Silk printing 9a Solid printing 9b, 9c Mesh printing

Claims (3)

[Claims] 1. An LED as a light source for illuminating a display panel section.
In a lighting device for a display panel unit using an element (light emitting diode), the LED is provided at a position corresponding to each display unit of the display panel.
The element is supported and mounted on the wiring board, and the LED
An illumination device for a display panel, wherein a light reflecting member is formed on a wiring board around the element mounting surface. 2. The illumination device for a display panel according to claim 1, wherein the light reflecting member is silk-printed on the wiring board. 3. The silk printing has a mesh shape,
The lighting device for a display panel section according to claim 1, wherein light from the LED element is diffused.