JPH10282914A - Light emitting diode bright structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent lighting mottle, to improve luminance, and to reduce the manufacturing cost by mounting light emitting diodes lighting operation buttons, LED lenses, a display part, and the like on a wiring board. SOLUTION: Operation switches 21 are mounted between the center part and the lower part of a surface of a wiring board 20, light emitting diodes 22 of required numbers are mounted at required points between operation switches 21, and white resist 23a is applied on a whole surface corresponding to the operation part of the wiring substrate 20 excluding light emitting diodes and operation switches 21. A liquid crystal display unit is mounted at the slightly upper part from the center part of a surface of the wiring board 20, light emitting diodes 26 of required numbers are mounted transversely with one line at the lower part of the liquid crystal display unit, and white resist 23b of a band shape is applied on a surface of the wiring board 20 along light emitting diodes. A light emitting diode 27 is mounted also at an upper end part of the wiring board 20 corresponding to a LED lens, white resist 23c is applied also on a peripheral part of the light emitting diode 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bright structure of a light emitting diode for illuminating an operation section of a small electronic device such as a portable telephone.

[0002]

2. Description of the Related Art Small electronic devices such as portable telephones have a brilliant structure in which an operation unit is illuminated so that operation is possible even in a dark place. A light emitting diode is mounted on a wiring board provided inside the small electronic device, and the light emitting diode illuminates an operation button, a liquid crystal display, and the like.

FIGS. 3 to 5 show conventional small electronic devices,
In particular, a light emitting diode bright structure in a mobile phone will be described.

[0006] The mobile phone 1 shown in FIG.
An antenna 3 protrudes from one end of the upper surface 1 of the housing 2, and an LED lens 4 is fitted from the upper surface of the housing 2 to the front. A receiving unit 5, a display unit 6, an operation unit 7, and a transmitting unit 8 are provided on the front of the housing 2 in this order from above.

A push button 9 is provided on an operation unit 7 on the upper surface of the housing 2.
Are formed in a required arrangement such as a matrix, and a push button pad 11 is provided on the inner surface side of the upper surface of the housing 2. The push button pad 11 is made of translucent synthetic rubber, and the push button 9 that penetrates the button hole 10 is integrally formed.

The wiring board 12 shown in FIG. 4 is provided in parallel with the inner upper surface of the housing 2.
Operation switches 13 are mounted on the surface of the device 2 in correspondence with the push buttons 9, and a required number of light emitting diodes 14 for illuminating the operation unit 7 are mounted at required positions between the operation switches 13.

On the wiring board 12, a liquid crystal display unit (not shown) including an LCD pedestal 15, a backlight (not shown), and a liquid crystal display (not shown) corresponding to the display section 6 is provided. A light emitting diode 16 for illuminating the liquid crystal display unit is attached to the lower part of the liquid crystal display unit.
The required number has been implemented.

The LE is also provided above the wiring board 12.
Light-emitting diode 17 for notification of incoming call corresponding to D lens 4
Has been implemented.

The push button pad 11 is provided between the wiring board 12 and the housing 2, and the operation switch is provided between the push button pad 11 and the wiring board 12 so as to provide an operational feeling of the push button 9. A resilient sheet 18 whose portion corresponding to 13 is curved in a convex shape is provided.

The light emitting diodes 14, 16, 17 are:
For example, the mobile phone 1 emits light when receiving a radio wave, and the LED lens 4, the liquid crystal display, the push button 9
To illuminate.

[0011]

However, in the above-described conventional light-emitting diode luminous structure, there are problems such as uneven illumination and insufficient luminance. In order to improve luminance, the resilient sheet 18 must be made white. However, when a white elastic sheet was used, there were problems such as an increase in component costs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and aims to eliminate illumination spots, improve luminance, and reduce costs.

[0013]

According to the present invention, an operation button, an LED lens, a light emitting diode for illuminating a display unit and the like are mounted on a wiring board in a small electronic device such as a portable telephone, and at least a peripheral portion of the light emitting diode is provided. The present invention relates to a light-emitting diode glitter structure having a diffusion film attached thereto, and the diffusion film relates to a light-emitting diode glitter structure which is a white resist or a white silk print. Diffuses, eliminates illumination spots, and improves brightness.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

The wiring board 20 shown in FIGS. 1 and 2 is provided inside the housing of a portable telephone (not shown), and the portable telephone is constructed in substantially the same manner as the above-mentioned conventional portable telephone. , The description of which is omitted.

From the center of the surface of the wiring board 20 downward, operation switches 21 are mounted corresponding to the push buttons of the operation section of the portable telephone, and a required number (eight in FIG. ) Is mounted, and the light emitting diode 22 and the operation switch 2 are mounted.
A white resist 23a is attached to the entire surface of the wiring board 20 except for the area 1 corresponding to the operation section.

A liquid crystal display unit 25 composed of an LCD pedestal 24, a backlight (not shown), and a liquid crystal display (not shown) is provided slightly above the center of the surface of the wiring board 20 in correspondence with the display. Is mounted, and a required number of light emitting diodes 26 (4 in the figure) are provided below the liquid crystal display unit 25.
) Are mounted in a row. A white resist 2 is formed on the surface of the wiring board 20 along the light emitting diode 26 in a strip shape.
3b is deposited.

A light emitting diode 27 corresponding to the LED lens is mounted on the upper end of the wiring board 20, and a white resist 23c is also attached to the periphery of the light emitting diode 27.

For example, when the portable telephone receives a radio wave, the light emitting diodes 22, 26 and 27 emit light.
Light from the light emitting diodes 22, 26, and 27 is irregularly reflected by the white resists 23a, 23b, and 23c (hatched portions in FIG. 1) and diffused over the entire surface. The operation button, the display unit, and the LED lens are illuminated without unevenness by the diffused light. Also, the white resists 23a, 23
3b and 23c efficiently reflect and diffuse the light of the light emitting diodes 22, 26 and 27, eliminate light loss, and improve luminance. Therefore, there is no need to separately make the resilient sheet white, and the resilient sheet can be made of a transparent material.
Further, the cost can be reduced in combination with the fact that the number of light emitting diodes can be reduced.

The diffusion film is not limited to a white resist such as a white resist formed on the periphery of the light emitting diode, but may be white silk printing or the like. May be limited to the peripheral part of.

[0021]

As described above, according to the present invention, a light emitting diode emits light, illuminates an operation button, a display unit, an LED lens, and the like, and a light diffused film such as a white resist diffuses light from the light emitting diode. As we remove illumination spots and improve brightness,
Since the number of light-emitting diodes can be reduced and the resilient sheet can be made of a transparent sheet, excellent effects such as cost reduction can be exhibited.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view showing the first embodiment.

FIG. 3 is a schematic explanatory view of a conventional mobile phone.

FIG. 4 is a front view showing a conventional example.

FIG. 5 is a view taken in the direction of arrows AA in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Wiring board 21 Operation switch 22 Light emitting diode 23a Resist 23b Resist 23c Resist 26 Light emitting diode 27 Light emitting diode

Claims (2)

[Claims] In a small electronic device such as a mobile phone, a light emitting diode for illuminating an operation button, an LED lens, a display unit, and the like is mounted on a wiring board, and a diffusion film is attached to at least a periphery of the light emitting diode. Light emitting diode brilliant structure. 2. The light emitting diode luminous structure according to claim 1, wherein said diffusion film is made of white resist or white silk printing.