KR101113023B1 - Light guide sheet - Google Patents

Abstract

The present invention relates to a waveguide sheet for a keypad of a portable terminal using a cutting, for example, rectangular, triangle, circle, ellipse, and water droplet-shaped cutting to increase luminance at a portion corresponding to a key region of a keypad.
To this end, the present invention is a light guide plate of FLGF which diffusely diffuses the horizontal light emitted from the light emitting device between the keypad and the printed circuit board of the portable terminal by the rectangular shape (14), triangular shape (16), circular shape (18). And the keypad 30 to which a plurality of buttons printed with numbers or letters on the surface are formed on the fabric 10 having the full cutting of the water droplets 12 and the water droplets 12 in combination; The function key region of the fabric 10 is a key portion of line a is a symmetrical drop shape 12 with a triangular shape 16 in the center, and a key portion of line b is a rectangular shape 14 in the center. A small water droplet shape symmetrical with small droplet shape (12), the key portion of the c line is arranged in a left and right droplet shape 12 and a circular shape (18); Numerical key area of the fabric 10, the d-line to the i-line with a small triangular shape (16), two rows of water droplets (12), a large triangular shape (16) with a large triangular shape (14) Each of the water droplets 12 is arranged on the basis of a small triangular shape (16) and one or two circular shapes 18 are arranged under the shape.

Description

Waveguide Sheet for Keypad {LIGHT GUIDE SHEET}

The present invention relates to a waveguide sheet for a keypad of a portable terminal using a cutting, for example, rectangular, triangle, circle, ellipse, and water droplet-shaped cutting to increase luminance at a portion corresponding to a key region of a keypad.

The product feature of the light guide plate for the keypad of the portable terminal which has been made up to now is given a certain scratch (Scretch) at the bottom of the light guide plate, and implemented in a multi-faceted manner so that the light direction of the light emitting diode (LED) can rise to the top.

However, in order to give a scratch at the bottom of the light guide plate during processing, that is, V cutting, hot press, forming, pressing, sealing and laser, it was accompanied by a lot of working time and processing difficulties in mass production.

Therefore, the inventors of the present invention have been considered in various ways to implement a light guide plate using a perfect perforation, rather than giving a cross-sectional scratch of light as a method that is generally available for mass production using a plotter or mass production using a press and a sealing machine. .

On the other hand, when looking at the complete punching method in the conventional keypad was to proceed to the hole to reduce the height of the waveguide in the guide hole, the light emitting diode hole, and the actuator dome and increase the key sense of the dome.

The present invention invented a waveguide formed only by perforations in view of the above circumstances, by using the maximum of the light incident on the fabric by using the reflection and refraction of the light substantially leaking outwards The purpose is to provide a waveguide sheet for a keypad of a portable terminal that can minimize the light and maximize the extreme efficiency of light.

Another object of the present invention is to use a waveguide sheet for a keypad of a portable terminal that can maintain a smooth click feeling every time the corresponding key is touched by using a full-cutting of various shapes to increase the brightness in the portion corresponding to the key area of the keypad. Can provide.

In order to achieve the above object, the present invention provides a rectangular light guide plate of a FLGF (Full Cutting Keypad Lighting Guide Film) which diffuses light emitted in a horizontal direction from a light emitting device between a keypad of a portable terminal and a printed circuit board by diffuse reflection. 14) the keypad on which a plurality of buttons are printed, the numbers or letters of the surface of which are formed on the processing fabric 10 in which the full cutting of the triangular shape 16, the circular shape 18 and the droplet shape 12 is arranged in combination. 30) is configured to combine; As the function key area of the fabric 10, the upper part of the upper part of the display is a symmetrical drop shape 12 with a triangular shape 16 in the center, and the key part of the upper middle display is a rectangular shape of the center (14). ) And a small droplet shape symmetrical with a small droplet shape (12), the key portion of the upper bottom display is arranged in a left and right droplet shape 12 and a circular shape (18); Numerical key area of the processing fabric 10, from the top of the bottom display to the bottom of the bottom display with a small triangular shape (16), two rows of water droplets (12), a large triangular shape (16) in a large square shape ( 14) and each of the water droplets 12 are arranged on the basis of the small triangular shape 16 so that one or two circular shapes 18 are arranged under the shape.

As described above, according to the present invention, there is provided a waveguide sheet for a keypad of a portable terminal using a full cutting of a rectangle, a triangle, a circle, an ellipse, and a drop shape to increase luminance at a portion corresponding to a key region of the keypad. can do.

In addition, the present invention has an effect that can achieve a smooth click feeling when touching the corresponding key by using a full cut of various shapes.

1 is a separated state diagram for explaining a waveguide sheet for a keypad of a portable terminal according to the present invention;
2 is a coupling state diagram illustrating a waveguide sheet for a keypad of a portable terminal of the present invention;
3 to 6 are state diagrams showing the degree of refraction of light according to each shape in the fabric shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a separated state diagram for explaining a waveguide sheet for a keypad of a portable terminal according to the present invention, Figure 2 is a coupling state diagram showing a waveguide sheet for a keypad of a portable terminal of the present invention.

According to the present invention, perforation is formed on the light guide plate of the portion corresponding to the key region of the keypad, for example, a rectangular cut 14, a triangular 16, a circular 18 and a water droplet 12 are completely cut. It is a waveguide sheet for a keypad of a used portable terminal. In addition, the present invention can achieve a smooth click feeling when the corresponding key of the keypad 30 is touched by using the fully cut processing fabric 10 of various shapes.

The fabric 10, which is a combination of the square shape 14, the triangular shape 16, the circular shape 18, and the water droplet shape 12, is arranged in combination with the light emitted from the light emitting element on the printed circuit board in the horizontal direction. This is a light guide plate of a Full Cutting Keypad Lighting Guide Film (FLGF) that causes diffuse reflection to diffuse, and as shown in FIG. 2, the keypad 30 having a plurality of buttons printed with numerals or letters on the surface is combined.

The light guide plate is an optical sheet for converting a point (LED) light source into a surface light source by forming a precut pattern on a 0.125 m / m flashable polycarbonate sheet, wherein the rectangular shape (14), triangle shape (16), and circle Full cutting of shape (18) and water drop (12) to adjust brightness of each key part (CLR, SEND, END, 1 2 3 4 5 6 7 8 9 * 0 #) brightly It is made to distribute uniformly, spreading and increasing overall.

Therefore, the fabric 10 is cut into a large number of droplets 12, squares 14, triangles 16, and circles 18 from the top a line to the bottom i line by cutting each key large and small. It is arranged in combination to fit the site (CLR, SEND, END, 1 2 3 4 5 6 7 8 9 * 0 #).

That is, the function key area of the processing fabric 10 is the upper upper display (a line), the upper middle display (b line), and the upper lower display (c line), and the key portion of the a line is formed in the center triangle shape (16). Symmetrical water droplets (12), the b line is the center of the square shape (14) and the small droplet shape symmetrical big and small droplets shape (12), the key portion of the c line is the left and right water droplets It is a shape (12) and a circle (18).

The numerical key area of the fabric 10, the upper upper display (d line) .. The lower lower display (i line), and from the d line to the i line of the small triangular shape (16) and two lines of the center Each droplet 12 is arranged with a droplet shape 12 and a large triangle shape 16 through a large square shape 14 and a small triangle shape 16. Under the shape, one or two circular shapes 18 are arranged.

As described above, perforations are formed on the keypad 30 to further increase luminance, for example, a square shape 14, a triangular shape 16, a circular shape 18, and a droplet shape 12, which are large and small. Full cutting is used. In addition, the fabric is able to give a soft touch feeling when touching the key by using a full cutting of various shapes.

Therefore, the present invention can maximize the extreme efficiency of the light as well as minimize the light leaking to the outside by using the maximum of the light incident on the fabric by using the reflection and refraction of the light.

3 to 6 are state diagrams showing the degree of refraction of light according to each shape in the fabric shown in FIG. The fabric of the waveguide sheet using the large and small perforations has various forms, using the shapes of the square shape of FIG. 4, the triangle of FIG. 5, the circle of FIG. 6, the ellipse and the water droplet of FIG. 3. The product can be realized by forming a waveguide only with a perforation without using a pattern by using the degree of exposure to the exposed part.

With the actual implementation of the waveguide sheet of the present invention, the brightness management according to the size has a difference in the degree by varying the size even if they have the same effect, and can proceed with a difference between the one near the top and the bottom of the light emitting device (LED). have.

In addition, the refraction and reflection of light using shapes can effectively arrange the effects of circulation, reflection, and refraction of light using various shapes. Light diffusion using light scattering is to use the degree of light emitted from each cut part of the processed fabric to make the light more clear and reduce the amount of light leaking out to raise the best brightness.

As the fabric uses full cutting of various shapes, smooth click feeling can be achieved when the corresponding key is touched.

As shown in Figure 3a, the droplet-shaped light path in the processed fabric can produce a small but strong luminance at the upper side by dividing the light and maintaining the direction of the light. The light path in the shape of a water droplet shown in FIG. 3B is thickened and maintains the direction of light, thereby creating a large and strong luminance at the upper side, which can diffuse light from side to side.

The water droplet-shaped light path shown in FIG. 3C may divert the light to the right and change the direction of the light by giving a strong light to the whole part. As shown in FIG. 3D, the light path of the droplet shape divides the light to the left side and sends the light to the right side so that the amount of the right light and the left light can be adjusted according to the angle. Therefore, the brightness and distribution can be adjusted by fine adjustment using the shape of the water droplets shown in FIG. 3.

The light path of the rectangular shape shown in Figure 4a controls the left and right diffusion of light, the diffusion conduction is increased according to the corner radius value of the square and the light is reflected to the top side. The light path of the rectangular shape shown in Figure 4b is also light is lowered to the bottom but diffused to the left and right to enable the bottom transmission and diffusion at the same time. Therefore, light can be spread and distributed by using the rectangular shape shown in FIG.

The light path of the triangular shape shown in FIG. 5A collects light rather than the above-mentioned squares by even spreading of light and brightens it. The light path of the triangular shape shown in Figure 5b can be evenly diffused to the lower side than the upper side by the even spread of light. The light path of the triangular shape shown in Figure 5c is easy to transfer to the cross by transmitting the light to the middle of the lower left, the upper middle respectively.

Therefore, using the triangular shape shown in Figure 5 is used when violent light control is necessary and is good to transfer to the cross.

The circular light path shown in FIG. 6 is similar to the direction opposite to the above-described water droplets, but the light emitting area is large, and the amount of light going to the left and right is larger than that of the water droplets. Therefore, in the droplet-shaped effect is simple, but the mold processing is easy to use a lot of points depending on the situation.

In the other shapes of the fabric, the curved line is a function of largely refracting or collecting light, and the straight line may be a whole or partial reflection.

As described above, the present invention is applied to the waveguide by using a droplet shape or other shapes in order to use light, and can be used together with the pattern and the perfect punching. In addition, the present invention can achieve a smooth click feeling when touching the corresponding key by using a full cutting of various shapes.

As described above, the present invention can produce the same effect in the top view LED as well as the side view light emitting diode (LED). That is, when used as the top view LED, as shown in FIGS. 3 to 6, one side of the light is processed by the shape of the part which is received when the incident part of the light proceeds in various forms such as water droplets, rectangles, triangles, etc. Direction and desired direction can be adjusted.

When the various shapes and patterns are combined as shown in Figs. 3 to 6, the present invention can be utilized so that the pattern type can be used in existing processing methods, that is, press, laser.

As shown in Figure 3 to 6, the light guide plate product can be implemented by the punching process using water droplets, squares, triangular, etc. of the basic shape, in this case, when the height of the keypad on the light guide plate is high, the light efficiency is reduced Light can be maximized by using a separate reflective film on the bottom surface of the fabric, which is a light guide plate, slightly larger than a punch shape.

Therefore, in addition to serving as a light guide plate of a general mobile phone, it is also possible in the form of a lamination in order to increase the output of additional light guide light from the bottom of the fabric of the light guide plate.

For example, instead of using a light guide plate independently, it can be applied to existing light guide plate (LGF) products. First, when attaching to the upper part of the light guide plate, by applying a thinner film than the LED output part due to the thickness in the existing light guide plate (LGF), the light emitted from the LED is transmitted by using the light guide plate to transmit the entire light emission of the LED. The efficiency can be improved. This is to laminate the light guide plate (LGF) on the dome sheet and attach the light guide plate by bonding printing on the bottom.

When attaching to the bottom of the light guide plate, it is printed by bonding to the bottom of the light guide plate and attached to the dome sheet. Then, the light guide plate (LGF) is attached on the light guide plate. On the contrary, it aims to make the brightness higher and brighter when viewed by humans due to the high illuminance. This is to bond the light guide plate (LGF) after bonding the light guide plate on the dome sheet.

Meanwhile, in the case of a slim phone, a small space should be used, and in this case, various shapes of shapes shown in FIGS. 3 to 6 may be formed on the forge part and the light emitting diode part of the keypad to minimize the thickness of the slim phone. .

As described above, in the case of the side view LED, the shape of the incidence portion may be modified as in the top view LED to adjust the incident light.

Although described based on the waveguide sheet for keypad of the portable terminal of the present invention, this is illustrative of the best embodiment of the present invention and is not intended to limit the claims of the present invention.

It is apparent that the present invention can be variously modified and imitated by those skilled in the art without departing from the scope of the technical idea of the present invention.

10: processing fabric
12: droplet shape
14: square shape
16: triangle shape
18: circle shape
30: keypad

Claims (5)

A light guide plate of FLGF that diffuses the horizontally emitted light from the light emitting element by diffuse reflection between the keypad of the portable terminal and the printed circuit board, and has a rectangular shape (14), a triangle shape (16), a circular shape (18), and a water drop shape ( 12) the keypad 30 is configured to engage the keypad 30 in which a plurality of buttons with numbers or letters printed on the surface are formed on the fabric 10 in which the full cutting is combined;
As the function key area of the fabric 10, the upper part of the upper part of the display is a symmetrical drop shape 12 with a triangular shape 16 in the center, and the key part of the upper middle display is a rectangular shape of the center (14). ) And a small droplet shape symmetrical with a small droplet shape (12), the key portion of the upper bottom display is arranged in a left and right droplet shape 12 and a circular shape (18);
Numerical key area of the processing fabric 10, from the top of the bottom display to the bottom of the bottom display with a small triangular shape (16), two rows of water droplets (12), a large triangular shape (16) in a large square shape ( 14) and each of the water droplets 12 are arranged on the basis of the small triangular shape (16) for the keypad of the portable terminal, characterized in that one or two circular shape (18) is arranged under the water droplet and triangle shape. Waveguide sheet.
The method of claim 1,
The water wave shape in the processing fabric is a fine control to adjust the brightness and distribution, the square shape is a light diffusion and dispersion, the triangle shape is a waveguide sheet for a keypad of a portable terminal, which is used when violent light control is required .
The method of claim 2,
The waveguide sheet for a keypad of a portable terminal, characterized in that the light guide light is adjusted in one direction and a desired direction by the shape of the portion received when the incident portion of the light guide in the processing fabric in the form of water droplets, rectangles, triangles and circles.
The method of claim 1,
The waveguide sheet for a keypad of a portable terminal, characterized in that the curved in the processed fabric is largely refracted or aggregated the light guide, and in the case of a straight line, the whole or partial reflection.
The method of claim 1,
Waveguide sheet for a keypad of a portable terminal, characterized in that to increase the output of the light guide by adding a separate reflective film slightly larger than the punching shape on the bottom surface of the processing fabric.

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