CN201112172Y

CN201112172Y - Printing type light conducting plate for electronic product press keys light source

Info

Publication number: CN201112172Y
Application number: CNU2007201190206U
Authority: CN
Inventors: 冯力航
Original assignee: CHEMRICH ELECTRONICS MATERIAL (SHENZHEN) Co Ltd
Current assignee: Renben Electronics (Shenzhen) Co., Ltd.
Priority date: 2007-03-16
Filing date: 2007-03-16
Publication date: 2008-09-10
Anticipated expiration: 2017-03-16

Abstract

The utility model relates to a printed light guide plate used for the light source of the press keys of electric products. The printed light guide plate comprises a light guide base plate which is arranged at the back of a press key panel, wherein, one end margin of the light guide base plate is right opposite to an LED light and a plurality of ink spots are arranged on each position requiring lighting at one side surface, falling away from the press key panel, of the light guide base plate. The ink spots are preferably arranged sparsely at one end, close to the LED light, of the light guide base plate and intensively at the other end, far from the LED light, of the light guide base plate. By printing and forming the ink spots on each position requiring lighting of the light guide base plate of the utility model, the light from the light guide base plate is refracted by the ink spots to light up the back of the press key and further light up the press key. The printed light guide plate has simple structure, low cost and high efficiency; the intensity of the ink spots increases from the end close to the LED light to the other end far away from the LED light; the more the ink spots are, the more the light is refracted, thereby making up for the defect of low light intensity at the end, far from the LED light due to the attenuation of light of the light guide base plate and guaranteeing the even light intensity of the whole press key panel.

Description

The printed form light guide plate that electronic product button light source is used

Technical field

The utility model relates to a kind of light guide plate, is meant the printed form light guide plate that a kind of electronic product button light source is used especially.

Background technology

The inboard of electronic product (for example mobile phone, PDA, MP3/MP4 etc.) button often is equiped with light source illuminating button, so that the user still can find sign on the button when using at the dark place with correct selection key.At present, a kind of light source is to illuminate in the some LED lamp of button installed inside, yet this to illuminate the mode structure comparatively complicated, and distribution of light is inhomogeneous, and is brighter from the zone that the LED lamp is near, and darker from LED lamp zone far away, is unfavorable for using.Another kind of light source is in the back side of button installing one deck light guide base plate, at an end of light guide base plate the LED lamp is housed.The LED lamp is luminous, guides to the button back side by light guide base plate and illuminates, and then, there is the uneven defective of distribution of light equally in this mode that illuminates.

The utility model content

Technical problem to be solved in the utility model is: the printed form light guide plate that provides a kind of electronic product button light source to use, its cost is low, and the light guide effect height.

The further technical problem to be solved of the utility model is: the printed form light guide plate that provides a kind of electronic product button light source to use, its distribution of light of shining on key panel is even.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: the printed form light guide plate that provides a kind of electronic product button light source to use, comprise for the light guide base plate of being located at the key panel back side, light guide base plate one ora terminalis is over against the LED lamp, and a side surface that deviates from key panel in light guide base plate needs the luminous position place to be printed with some printing ink site at each.

Preferably, on the described light guide base plate from by LED lamp one end to away from LED lamp one end by rare to thickly distributing the printing ink site.

Preferably, described printing ink site is the printing ink site that is added with color pigment.

Preferably, described light guide plate is a color light guide plate, the transparence and the printing ink site is white in color.

Preferably, described LED lamp is a color LED lamp.

Preferably, described light guide base plate is PC substrate or pet substrate.

The beneficial effects of the utility model are: the utility model is by each needs the printing of luminous position place to form the printing ink site on light guide base plate, can the light refraction in the light guide base plate be come out to shine in the button back side by the printing ink site, thereby illuminate button, it is simple in structure, and cost is low, the efficient height; The density of printing ink site can be determined according to required light luminance; Also can design the density of printing ink site according to the printing ink site recently with respect to the distance of LED lamp, near more from the LED lamp, the printing ink dot density is more little, and far away more from the LED lamp, the printing ink dot density is big more, and the printing ink site is many more, the light of refraction is many more, after adopting design like this,, whole key panel light luminance is evenly distributed by reflecting more rays though the light attenuation in the light guide base plate is feasible low slightly away from LED lamp place light luminance.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Description of drawings

Fig. 1 is the schematic diagram of the printed form light guide plate used of the utility model electronic product button light source.

Fig. 2 is that printed form light guide plate that the utility model electronic product button light source is used is mounted to the schematic diagram on the key panel.

Fig. 3 is a light guide plate refracted ray schematic diagram.

Embodiment

As shown in Figure 1 to Figure 3, the printed form light guide plate that the utility model provides a kind of electronic product button light source to use comprises that described light guide base plate 4 can adopt the material of leaded light excellent performances such as PC substrate or pet substrate for the light guide base plate 4 of being located at key panel 7 back sides.Light guide base plate 1 one ora terminalis are over against LED lamp 2, a side surface that deviates from key panel 7 in light guide base plate 1 needs the luminous position place to be printed with some printing ink site 6 at each, usually adopt the mode of silk screen printing, and need luminous position normally corresponding to the position of each button on the key panel 7, like this, when the light that the LED lamp sends is transmitted to the position of printing ink site 6 through light guide base plate 4, promptly can reflect, a side that is not provided with printing ink site 6 towards light guide base plate 4 is penetrated, as shown in Figure 3.Consider that light has decay to a certain degree in light guide base plate 4, for guaranteeing that key panel 7 light intensity everywhere evenly distributes, and the distribution density of printing ink site 6 is designed to lean on LED lamp 2 one ends to extremely thickly being distributed by rare away from LED lamp 2 one ends from described light guide base plate 4, like this, though it is low slightly away from LED lamp 2 place's light luminances that the light attenuation in the light guide base plate 4 makes, by reflecting more rays whole key panel 7 light luminances is evenly distributed.

Shown in Figure 2, be that light guide base plate 4 is installed on structural representation on the key panel 7, the appropriate location is provided with the shell fragment 3 of protrusion on its button substrate 1, and is provided with one deck conductive silver paste 5 at upper surface, and this is identical with the common key-press board structure; And light guide base plate 4 is pasted on the back side of key panel 7 with the one side that is not provided with printing ink site 6, and it is provided with a side of printing ink site 6, and LED lamp 2 is located at an end of light guide base plate 4; Then, key panel 7 is assembled in button substrate 1 top, makes light guide base plate 4 between key panel 7 and button substrate 1.

And be to realize the glory effect, the simplest mode is the employing color LED lamp.Certainly, when adopting common white LED lamp, then can adopt color light guide plate, and the printing ink site transparence that is white in color, equally can be with the LED white light through color light guide plate and change into colourama; Also can adopt water white light guide plate, and can in described printing ink site, add color pigment, can make the light that reflects away be colored equally.

Claims

1. printed form light guide plate that electronic product button light source is used, comprise for the light guide base plate of being located at the key panel back side, light guide base plate one ora terminalis is characterized in that over against the LED lamp: a side surface that deviates from key panel in light guide base plate needs the luminous position place to be printed with some printing ink site at each.

2. light guide plate as claimed in claim 1 is characterized in that: described light guide base plate from by LED lamp one end to away from LED lamp one end by rare to thickly distributing the printing ink site.

3. light guide plate as claimed in claim 1 or 2 is characterized in that: described light guide plate is a color light guide plate, the transparence and the printing ink site is white in color.

4. light guide plate as claimed in claim 1 or 2 is characterized in that: described LED lamp is a color LED lamp.

5. light guide plate as claimed in claim 1 is characterized in that: described light guide base plate is PC substrate or pet substrate.