TWM458604U - Keypad light-guiding structure of touch-control mobile phone - Google Patents

Abstract

The utility model discloses a key light guide structure of a touch phone. The key light guide structure of the touch phone comprises a light emitting diode (LED) luminous source, a light guide film and a light guide piece, wherein the top surface of the light guide film is provided with a bright dipping face arranged at a position corresponding to functional key characters of the touch phone. The bottom surface of the light guide film is provided with a light guide piece, wherein the light guide piece bends to form a preset shape, a first end of the light guide piece is formed into a section which can accommodate light rays emitted by the LED luminous source, and the section of the second end of the light guide piece is formed to be smaller than the first end of the light guide piece. In the light guide piece, besides the first end and the second end, electroplated reflective film coating is paved outside all outer surfaces of the light guide piece to prevent the light rays from being emitted out. The first end of the light guide piece is matched with the LED luminous source, and the second end of the light guide piece is connected with a side face of the light guide film. On one hand, the key light guide structure of the touch phone can greatly improve the luminous efficiency of the LED luminous source and enable the light rays projected on the functional key characters to be even; on the other hand, the key light guide structure of the touch phone is favorable for further thinning the thickness of the touch phone, and therefore provides the basis for further miniaturization of the touch phone.

Description

Touch phone button light guiding structure

The present invention relates to a touch mobile phone, and more particularly to a touch light guide structure of a touch mobile phone capable of efficiently emitting light.

With the continuous advancement of communication technology and the continuous improvement of information technology, mobile phones have become one of the indispensable items in people's daily life. At the same time, in order to facilitate people to carry and use, mobile phones are also moving toward miniaturization, light weight, thinning and multi-functionality. Among them, the touch mobile phone is one of the most popular mobile communication devices at present. Although the touch mobile phone adopts a large-screen touch screen, there are still several function keys in the touch mobile phone, so that the user can quickly use the touch function. The function of the mobile phone, in order to ensure that the function keys can be used well at night or under the condition of insufficient light, the existing touch mobile phone will set the backlight after the function key, and when the mobile phone is used, the backlight is bright and used. The characters of the function keys can be clearly seen. In the existing touch mobile phone or other push-button mobile phone, the LED light source is usually disposed under the function key or the button. When the mobile phone is used, the LED light source automatically emits a high-level light, and the light directly passes the function key or Buttons to provide backlighting, but this structure is not conducive to thinning the phone. Therefore, in a conventional touch mobile phone, a light guide plate is disposed under the function key, and a side opposite to the function key of the light guide plate forms a light surface, and an LED light source is disposed on the other side of the light guide plate that intersects the light exit surface. The LED illumination source is controlled by the circuit board to emit light, so that the light guide plate refracts and reflects the light emitted by the LED illumination source, so that the light enters from the side. The light can be directed to the upper direction to provide backlight for the function keys above the light guide plate. However, this structure still has the following two drawbacks: First, the light efficiency is not high and the light is uneven, and there is more light loss. It is because some light entering the light guide plate is refracted from the bottom surface or other side surfaces, which affects the light efficiency and makes the display of the function keys have uneven brightness; secondly, it is not conducive to the thinning of the touch mobile phone, which is due to The light guide plate needs to have a certain thickness to receive the light emitted by the LED light source through the side.

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a light guiding structure of a touch mobile phone button, which can greatly improve the luminous efficiency of the LED light source and uniformize the light projected on the function key. On the other hand, it is beneficial to further thinning the thickness of the touch mobile phone, thereby providing a basis for further miniaturization of the touch mobile phone.

The technical solution adopted by the present invention to solve the technical problem is: a light guiding structure of a touch phone button, comprising: at least one LED light source; a light guiding film, the upper surface of the light guiding film is set as a light emitting surface, and the light guiding film The upper surface is disposed at a position corresponding to the function key of the touch mobile phone; in the bottom surface of the light guide film, a light guide body is further disposed at a position corresponding to the function key of the touch mobile phone; a light guiding member, the light guiding member is bent into a predetermined shape, the first end of the light guiding member is set to be sufficient to accommodate a cross section of the light emitting line of the LED light source, and the cross section of the second end of the light guiding member is set to be smaller than a cross-sectional dimension of the first end of the light guide; in the light guide, except for the first end and the second end The outer surface is provided with an electroplated reflective film layer to prevent light entering the light guiding member from being emitted from the outer surface; the first end of the light guiding member is disposed at a position capable of cooperating with the corresponding LED illumination source, and guiding light The second end of the piece is connected to the side of the light guiding film.

Further, a plating reflective film layer is disposed on the bottom surface of the light guiding film, and the plating reflective film layer covers the bottom surface and is coated on the outside of the light guiding body to block light entering the light guiding film from the bottom surface Shoot it out.

Further, in the light guiding film, all the side surfaces except the intersection with the second end of the light guiding member are provided with a plating reflective film layer to prevent light entering the light guiding film from being emitted from the side surfaces. .

Further, in the light guiding film, a plating reflective film layer is further disposed on the upper surface except the position corresponding to the function key of the touch mobile phone to block the light entering the light guiding film from these The upper surface is shot out.

The junction between the second end of the light guiding member and the side surface of the light guiding film is a unitary structure.

The second end of the light guiding member is fixed to the side surface of the light guiding film by adhesive bonding.

The second end of the light guiding member and the side surface of the light guiding film are fixed by ultrasonic bonding.

The light guide body on the bottom surface of the light guiding film is composed of uneven spots formed by frosting.

The light guide body on the bottom surface of the light guiding film is composed of light guiding ink dots formed by printing.

The light guiding structure of a touch mobile phone button of the present invention is in the light guiding member All of the outer surfaces except the first end and the second end are provided with an electroplated reflective film layer to prevent light entering the light guide from being emitted from the outer surfaces; thus, from the inner cavity of the light guide member Corresponding to the lens, it can totally reflect the light, and can well guide the light entering the light guide from the second end to the light guiding film.

The light emitted by the LED illumination source first enters from the first end of the light guide (ie, the end with a larger cross-sectional area), passes through the refraction and total reflection of the light guide, and then passes through the second end of the light guide (ie, the cut The smaller end enters the light guiding film, and then passes through the refraction and reflection of the light guiding film, that is, a part is directly refracted from the light emitting surface of the light guiding film, and the other part is reflected and guided through the back surface of the light guiding film. The diffusion of the light guiding body of the light film is emitted from the light emitting surface, which can greatly improve the luminous efficiency of the LED light source and uniformize the light projected on the function key.

The touch light guiding structure of the touch mobile phone can also be provided with a plating reflective film layer on the bottom surface of the light guiding film, and the plating reflective film layer covers the bottom surface and is coated on the outside of the light guiding body. The light that enters the light guiding film is prevented from being emitted from the bottom surface; thus, the light guiding film is also equivalent to the lens, and the light can be totally reflected. In order to achieve a better effect, further, in the light guiding film, all the peripheral sides except the interface with the second end of the light guiding member are provided with a plating reflective film layer to block the light entering the light guiding film. Shot from these sides, that is, an electroplated reflective film layer is also applied to the peripheral sides of the light guiding film. Of course, it must be excluded from the position at the junction with the second end of the light guiding member, thus making the four sides of the light guiding film It can also totally reflect light. Further, in the light guiding film, in addition to the function key character of the touch mobile phone An electroplated reflective film layer is further disposed on the upper surface other than the corresponding position to prevent light entering the light guiding film from being emitted from the upper surface, that is, an electroplated reflective film layer is also disposed on the upper surface of the light guiding film. The upper surface must have a light-emitting area, and the light-emitting area is located at a position corresponding to the function key of the touch mobile phone, so that the upper surface of the light-guiding film can also totally reflect the light. Therefore, for the light guiding film, except for the light exiting region and the light incident region (ie, the region in contact with the light guiding member), the light entering the light guiding film can be totally reflected, so that the luminous efficiency is greatly improved. And the light is even.

The light guiding structure of the touch mobile phone button of the present invention is provided with a light guiding body at a position corresponding to the function key character of the touch mobile phone in the bottom surface of the light guiding film, and the light guiding body may be the light guiding film body The concave and convex points formed by the frosting may also be the light guiding ink dots formed on the light guiding film, and when the light hits the concave and convex points or the light guiding ink dots, an upward diffusion occurs, and the pair of function keys are emitted. The light forms a good superposition effect.

The beneficial effect of the present invention is that the LED light source, the light guiding film and the light guiding member are used to form the light guiding structure; and the upper surface of the light guiding film is set as the light emitting surface, and the upper surface of the light guiding film is set and touched Controlling the corresponding position of the function key of the mobile phone; in the bottom surface of the light guiding film, a light guiding body is further disposed at a position corresponding to the function key of the touch mobile phone; the light guiding member is bent into a preset The first end of the light guiding member is configured to be sufficient to accommodate a cross section of the light emitting line of the LED light source, and the cross section of the second end of the light guiding member is set to be smaller than the cross sectional dimension of the first end of the light guiding member; In the piece, all outer surfaces except the first end and the second end are provided with an electroplated reflective film layer to block entry into the light guide member The light is emitted from the outer surfaces; the first end of the light guide is disposed at a position compatible with the corresponding LED light source, and the second end of the light guide is connected to the side of the light guide film; The aspect can greatly improve the luminous efficiency of the LED light source and make the light projected on the function key characters uniform, and on the other hand, the thickness of the touch mobile phone is further thinned, thereby providing a basis for further miniaturization of the touch mobile phone. Since the plating reflective film layer is provided on the bottom surface of the light guiding film, the light entering the light guiding film is not refracted outside the bottom surface of the light guiding film, but is totally reflected by the bottom surface, thereby improving light efficiency. Since an electroplated reflective film layer is applied to the peripheral side and the upper surface of the light guiding film, these surfaces form a lens-type total reflection of the light entering the light guiding film, thereby improving light efficiency and uniformizing the light. Since the frosted embossed dots or the light guiding ink dots are provided in the bottom surface of the light guiding film, these dots diffuse the light to make the light uniform.

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the light guiding structure of the touch phone button of the present invention is not limited to the embodiment.

For example, as shown in the accompanying drawings, a light guide structure of a touch mobile phone is used on a touch mobile phone. As shown in FIG. 1 , the touch mobile phone includes a touch module 100 and a bottom of the touch mobile phone. The outer casing 200, the driving circuit board 300 of the LED and the light guiding structure of the present invention; the touch module 100 is provided with four function key characters 101.

Referring to FIG. 2 and FIG. 3 simultaneously, the light guiding structure of the present invention includes: at least one LED illumination source 1 (four in this embodiment, corresponding to four function key characters 101); a light guiding film 2, an upper surface of the light guiding film 2 is a light emitting surface 21, and an upper surface of the light guiding film 2 is disposed at a position corresponding to the function key 101 of the touch mobile phone; In the bottom surface, a light guide body 23 is further disposed at a position corresponding to the function key 101 of the touch mobile phone; the light guide film 2 is pasted with the adhesive 20, and the light guide film 2 can be touched by the adhesive 20 The module 100 is bonded together and the light-emitting surface 21 of the light guiding film 2 corresponds to the function key element 101.

Please refer to FIG. 4, FIG. 6 and FIG. 7 at the same time, at least one light guiding member 3 (four in the embodiment, corresponding to four function key characters 101), and the light guiding member 3 is bent into a preset shape. The first end 31 of the light guiding member 3 is disposed to be sufficient to accommodate a cross section of the light emitting line of the LED light source 1, and the cross-sectional dimension of the second end 32 of the light guiding member 3 is set to be smaller than the cross section of the first end 31 of the light guiding member 3. Dimensions; in the light guiding member 3, all outer surfaces except the first end 31 and the second end 32 are provided with a plating reflective film layer 34 to prevent light entering the light guiding member 3 from being emitted from the outer surfaces; It is noted that all outer surfaces except the first end and the second end, all of the outer surfaces referred to herein should exclude a very small portion of the outer surface that cannot be plated due to the position held by the clamp during the electroplating process.

The first end 31 of the light guiding member 3 is disposed at a position compatible with the corresponding LED light source 1, and the second end 32 of the light guiding member 3 is connected to the side surface of the light guiding film 2.

Wherein, the junction between the second end 32 of the light guiding member 3 and the side surface of the light guiding film 2 is an integral structure, that is, the light guiding member and the light guiding film are the same component; of course, the light guiding member and the light guiding member The membrane can also be two separate parts, the light guide The second end is fixed to the side of the light guiding film by a glue bonding, or the second end of the light guiding member is fixed to the side of the light guiding film by ultrasonic bonding.

Referring to FIG. 5, in the bottom surface of the light guiding film 2, a light guiding body 23 is further disposed at a position corresponding to the function key 101 of the touch mobile phone, and the bottom surface of the light guiding film 2 is The light guide body 23 is composed of a light guide ink dot formed by printing. Of course, the light guide body on the bottom surface of the light guide film may be formed of a bump formed by frosted. When the light hits the bump point or the light guiding ink point, an upward diffusion occurs, which forms a good superposition effect on the light that is directed to the function key 101.

The touch light guiding structure of the touch mobile phone of the present invention is that in the light guiding member 3, all outer surfaces except the first end 31 and the second end 32 are provided with a plating reflective film layer 34 to block the entrance of the light guiding light. The light of the piece 3 is emitted from the outer surface; thus, it is equivalent to the lens when viewed from the inner cavity of the light guiding member 3, and can totally reflect the light, and can well guide the light entering the light guiding member 3 from the second end. 32 leads to the light guiding film 2.

The light emitted by the LED illumination source 1 first enters from the first end 31 of the light guide member 3 (ie, the end having a larger cross-sectional area), passes through the refraction and total reflection of the light guide member 3, and then passes through the light guide member 3. The two ends 32 (ie, the end having a smaller cross-sectional area) enter the light guiding film 2, and then pass through the refraction and reflection of the light guiding film 2, that is, a part is directly refracted from the light emitting surface of the light guiding film 2, and the other part passes through The reflection of the back surface of the light guiding film 2 and the diffusion of the light guiding body 23 of the light guiding film 2 are emitted from the light emitting surface, which can greatly improve the luminous efficiency of the LED light source 1 and can be projected on the function key. The light is even.

In order to achieve better results, it can also be provided on the bottom surface of the light guiding film 2 An electroplated reflective film layer covering the bottom surface and covering the outer surface of the light guide body 23 to prevent light entering the light guiding film 2 from being emitted from the bottom surface; thus, the light guiding film 2 It is also equivalent to a lens, which can totally reflect light.

Further, it is also possible to design: in the light guiding film, all the side surfaces except the interface with the second end of the light guiding member are provided with a plating reflective film layer to block entering the light guiding film 2 Light is emitted from these sides; that is, an electroplated reflective film layer is also applied on the side surfaces of the light guiding film, of course, it must be excluded from the position at the junction with the second end of the light guiding member, thus making the light guiding film four The side also provides total reflection of light.

Further, the light guiding film is further provided with an electroplating reflective film layer in the upper surface except the position corresponding to the function key of the touch mobile phone to block the entrance of the light guide. The light from the film is emitted from these upper surfaces. That is, an electroplated reflective film layer is also added on the upper surface of the light guiding film. Of course, the upper surface must have a light exiting region, and the light emitting region is disposed at a position corresponding to the function key of the touch mobile phone, so that the light guiding light is made. The upper surface of the film also provides total reflection of light. Therefore, for the light guiding film, except for the light exiting region and the light incident region (ie, the region in contact with the light guiding member), the light entering the light guiding film can be totally reflected, so that the luminous efficiency is greatly improved. And the light is even.

The above embodiments are only used to further explain the light guiding structure of the touch mobile phone keys of the present invention, but the present creation is not limited to the embodiment, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present creation are provided. , all fall within the protection scope of this creative technical solution.

1‧‧‧LED light source

2‧‧‧Light guide film

3‧‧‧Light guides

20‧‧‧ Back glue

21‧‧‧Glossy

23‧‧‧Light guide

31‧‧‧ first end

32‧‧‧second end

34‧‧‧Electroplating reflective film

100‧‧‧ touch module

101‧‧‧Function key characters

200‧‧‧ touch phone bottom case

300‧‧‧Drive Circuit Board

1 is a schematic view showing the appearance of a mobile phone using the present invention; FIG. 2 is a schematic exploded view of the mobile phone using the present invention; FIG. 3 is a partial structural view of the present creation (top view); FIG. 4 is a side view of the present invention; 5 is a partial schematic view of the bottom surface of the light guiding film of the present invention; FIG. 6 is a schematic structural view of the light guiding member of the present invention; and FIG. 7 is a schematic cross-sectional view of the light guiding member (near the first end end portion) of the present invention.

100‧‧‧ touch module

101‧‧‧Function key characters

200‧‧‧ touch phone bottom case

Claims (9)

A light guide structure for a touch phone button, comprising: at least one LED light source; a light guide film, wherein an upper surface of the light guide film is a light exit surface, and an upper surface of the light guide film is disposed on the touch surface a position corresponding to a function key of the mobile phone; in a bottom surface of the light guiding film, a light guiding body is further disposed at a position corresponding to a function key of the touch mobile phone; at least one light guiding member, the guiding The light member is bent into a predetermined shape, and the first end of the light guide member is configured to be sufficient to accommodate a cross section of the light-emitting line of the LED light source, and the cross-sectional dimension of the second end of the light guide member is set to be smaller than the light guide member a cross-sectional dimension of the first end; in the light guide, all outer surfaces except the first end and the second end are provided with an electroplated reflective film layer to block light entering the light guide from the outer surface The first end of the light guiding member is disposed at a position compatible with the corresponding LED light source, and the second end of the light guiding member is connected to the side surface of the light guiding film. The light guide structure of the touch mobile phone button of the first aspect of the invention, wherein the bottom surface of the light guide film is provided with an electroplated reflective film layer covering the bottom surface and coated on the bottom surface The outside of the light body prevents light entering the light guiding film from being emitted from the bottom surface. The light guide structure of the touch mobile phone key according to the second aspect of the invention, wherein the light guide film is provided with all the plating sides except for the intersection with the second end of the light guide member. The film layer prevents light entering the light guiding film from being emitted from these sides. The light guide structure of the touch mobile phone button according to claim 3, wherein the light guide film is provided with the plating in an upper surface other than a position corresponding to a function key of the touch mobile phone. The film layer is reflected to prevent light entering the light guiding film from being emitted from the upper surfaces. The light guide structure of the touch mobile phone key according to the first aspect of the invention, wherein the second end of the light guide and the side of the light guide film are in an integrated structure. The light guide structure of the touch mobile phone according to the first aspect of the invention, wherein the second end of the light guide is fixed to the side of the light guide film by glue. The light guide structure of the touch mobile phone according to the first aspect of the invention, wherein the second end of the light guide is fixed to the side of the light guide film by ultrasonic bonding. The light guide structure of the touch mobile phone key according to the first aspect of the invention, wherein the light guide body of the bottom surface of the light guide film is composed of a concave-convex point formed by frosting. The touch light guide button light guide structure according to claim 1, wherein the light guide body of the bottom surface of the light guide film is formed by the light guide ink dots formed by printing.