CN101241205B

CN101241205B - Light guide method of light guide plate and key structure using same

Info

Publication number: CN101241205B
Application number: CN200710000452XA
Authority: CN
Inventors: 刘张礼
Original assignee: Ichia Technologies Inc
Current assignee: Ichia Technologies Inc
Priority date: 2007-02-07
Filing date: 2007-02-07
Publication date: 2010-07-21
Anticipated expiration: 2027-02-07
Also published as: CN101241205A

Abstract

A key structure comprising: the circuit board, the first elastic layer, the second elastic layer, the shading layer, the key group, the light-emitting component and the shading sheet. The light guide plate has on the second elastic layer, the shading structure that has the chain form on the light guide plate, the shading structure is formed by arranging a plurality of perforation with adjacent staggered mode, and two leaded light districts are separated into with the light guide plate to the shading structure, and after two outside different chromatic lights of leaded light district led into the light guide plate, at the light process in arbitrary leaded light district during the shading structure, will make through fenestrate light luminance decay, let light can't reach another leaded light district to avoid the light in two leaded light districts to produce mutual interference or mix light scheduling problem.

Description

The light-guiding method of light guide plate and the press-key structure that uses this light guide plate

Technical field

The present invention relates to a kind of button, the light-guiding method and the structure of the inner backlight of particularly a kind of button.

Background technology

Backlight module on being used in LCD, signboard, billboard widely, even also using backlight module widely as the electronic product of mobile phone, personal digital aid (PDA).Because backlight module is installed in button, thereby make the user at night or do not have under the situation of light source, still operation push-button successfully.

Traditional button is in the press-key structure internal configurations light guide plate to be arranged, and disposes light emitting diode at light guide plate periphery or bottom.When using electronic product, described light emitting diode is lighted immediately, and light is imported light guide plate inside, this moment light guide plate with the light guide arrangement on the button of light guide plate top, make keytop present translucent effect, allow the user can clearly see literal, numeral or symbol on each keytop.

Multi-color LED is manufactured in recent years come out after, it also is widely used on the button of electronic product.Heterogeneous light light emitting diode produces different color light, so that keytop or some button group present the colored backlight effect of different color light under the control of the circuit of electronic product.Because light guide plate has only one deck, if therefore have a plurality of heterogeneous light light emitting diodes to be lighted simultaneously, and light is imported light guide plate inside simultaneously, then make easily and light phase mutual interference or generation mixed light each other cause the shown coloured light of keytop can not reach the coloured light of original setting.Therefore, in order to solve light phase mutual interference or problem such as mixed light each other, therefore utilize the patch attaching of black or shading place that printing ink is coated light guide plate, after a plurality of polychromatic lights are imported into light guide plate inside, make keytop or some button group present the effect backlight of different color light, allow light can not produce problems such as interference or mixed light each other.But, when adopting this shading mode,, then will cause light leakage phenomena to take place if processing attaches or coating is handled desirablely not to the utmost, and the time-consuming and preface of taking a lot of work that also causes light guide plate to make.

Summary of the invention

Therefore, the present invention makes light-shielding structure on light guide plate, utilizes described light-shielding structure to decay by the light luminance of light-shielding structure, produces problems such as phase mutual interference or mixed light each other to avoid light.

For achieving the above object, be manufactured with the light-shielding structure of chain form on the light guide plate of the present invention, described light-shielding structure is to be arranged in the adjacent mode that staggers by a plurality of perforation to form, and described light-shielding structure is separated into two light guide zone with described light guide plate, after the light of the different color light of two light guide zone outsides imports light guide plate, the light of arbitrary light guide zone is during through described light-shielding structure, with the light luminance decay that makes by described perforation, allow light can't arrive another light guide zone, thereby avoid the light of two light guide zone to produce problems such as phase mutual interference or mixed light.

Description of drawings

Fig. 1 is the schematic flow sheet of the light-guiding method of light guide plate of the present invention;

Fig. 2 is the stereoscopic synoptic diagram of light guide plate of the present invention;

Fig. 3 is the local enlarged diagram of Fig. 2;

Fig. 4 is the shading synoptic diagram of light guide plate of the present invention;

Fig. 5 is the schematic top plan view of light guide plate of the present invention;

Fig. 6 is the schematic side view of light guide plate of the present invention;

Fig. 7 is the synoptic diagram that light guide plate of the present invention and press-key structure are used;

Fig. 8 is the schematic side view of Fig. 7;

Fig. 9 is the optical path synoptic diagram of Fig. 7;

Figure 10 is the schematic side view of another embodiment of the present invention;

Figure 11 is the synoptic diagram of light guide plate of the present invention when being used on the mobile phone; And

Figure 12 is the synoptic diagram of press-key structure of the present invention when being used on the automobile audio panel.

In the accompanying drawing, the list of parts of each label representative is as follows:

Step 100～106 light guide plate 1

Carrier 11 block shape light guide sections 12

Frame shaped light guide section 13 strip light guide sections 14

Leaded light microstructure 15 light-shielding structures 16

The perforation 161,161a light guide zone 17,17 '

Light 18

breach

19,19a, 19b

Refraction part 191,191a, 191b circuit board 2

First elastic layer, 3 thin shrapnels 31

Metal clips 32 second elastic layers 4

Elastic body 41 convex bodys 42

Light shield layer 5 hollow holes 51

Button group 6 buttons 61

Surface 611,311 adhesion layers 62

Slit 63 luminescence components 7

Base 71 illuminating parts 72

Anti-dazzling screen 8 mobile phones 9

Automobile audio panel 10

Embodiment

Relevant technology contents of the present invention and detailed description, existing conjunction with figs. is carried out following explanation.

Fig. 1 is the schematic flow sheet of the light-guiding method of light guide plate of the present invention.As shown in the figure, at first,, prepare light guide plate, be formed with block shape light guide section, frame shaped light guide section and strip light guide section on this light guide plate in step 100.

Step 102, the light-shielding structure of moulding chain form on light guide plate, described light-shielding structure is divided into two light guide zone with light guide plate, and described light-shielding structure is made up of a plurality of perforation, and described a plurality of perforation are arranged in the adjacent mode that staggers.

Step 104, when the luminescence component of arbitrary light guide zone outside was lighted, light was imported in this light guide zone.

Step 106, when light passes through the perforation of light-shielding structure, light will be perforated and reflect in adjacent perforation, cause the light luminance decay, thereby can't pass perforation and arrive another light guide zone, make two specific light sources that light guide zone produced can phase mutual interference or mixed light.

Fig. 2 is the stereoscopic synoptic diagram of light guide plate of the present invention, and Fig. 3 is the local enlarged diagram of Fig. 2.As shown in the figure, light guide plate 1 is the carrier of being made by the PC film of clear, colorless or TPU film 11, has block shape light guide section 12, frame shaped light guide section 13 and strip light guide section 14 on the carrier 11.Block shape light guide section 12 is directed to light on the corresponding one key, and frame shaped light guide section 13 is directed to light in the specific button group, and strip light guide section 14 is directed at light on the lateral margin of carrier 11.

The light guide section of block shape light guide section 12, frame shaped light guide section 13 and strip light guide section 14 is made up of a plurality of leaded light microstructures 15, after externally light imports carrier 11 inside, leaded light microstructure 15 changes the path of passing through of light, light can be concentrated be projeced on the button.

Simultaneously please together with reference to Fig. 4, at block shape light guide section 12, be provided with the light-shielding structure 16 of chain form between frame shaped light guide section 13 and the strip light guide section 14, it is separated into two light guide zone 17 with carrier 11,17 ', light-shielding structure 16 is to be arranged in the adjacent mode that staggers by a plurality of perforation 161 to form, after light guide zone 17 or 17 ' with light from outside 18 imports carriers 11, when light 18 passes through the perforation 161 of light-shielding structures 16, perforation 161 reflects light 18 on adjacent perforation 161a, make light 18 decay and can not pass light-shielding structure 16, therefore in light guide zone 17 and 17 ' when importing light 18 respectively, neitherly can produce problems such as phase mutual interference or mixed light.

Again together with reference to Fig. 5, a side and place, two angles at the carrier 11 of light guide plate 1 all are provided with

breach

19,19a, 19b, have stepped light refraction portion 191,191a, 191b in

breach

19,19a, the 19b, dispose luminescence component 7 on

breach

19,19a, the 19b, after the light 18 that luminescence component 7 is produced when being lighted is imported by refraction part 191,191a, 191b, allow light source can be diffused into quickly and evenly the

light guide zone

17,17 of carrier 11 ' on.

Again together with reference to Fig. 6, the leaded light particle 15 semicircular in shape shrinkage pool shapes on the light guide plate 1.After extraneous light 18 was imported into carrier 11 inside of light guide plate 1, when light 18 was passed through to leaded light microstructure 15, the little structure 15 of leaded light can change the path of passing through of light 18, thereby light 18 can be projeced on the button in the concentrated area.

Fig. 7 is the synoptic diagram that light guide plate of the present invention and press-key structure are used.As shown in the figure: disclosed press-key structure comprises in this figure: circuit board 2, first elastic layer 3, second elastic layer 4, light shield layer 5, button group 6, luminescence component 7 and anti-dazzling screen 8.

Circuit board 2 is for being printed with the thin film printed circuit board of circuit.

First elastic layer 3 is disposed on the circuit board 2, have the thin shrapnel of making by rigid PC material 31 on it and be covered on the thin shrapnel 31 and with the metal clips 32 of circuit board 2 corresponding configurations, metal clips 32 is when being pressed distortion, just produce snap sound, thereby allow the user feel to have the effect of pressing keys 61.

Second elastic layer 4 is disposed on first elastic layer 3, and is made up of light guide plate 1 and elastic body 41.Elastic body 41 is made by soft PC material, and itself and light guide plate 1 combine by the hot pressing technology, and forms a plurality of convex bodys 42 on elastic body 41, convex body 42 corresponding sheet metal 32 configurations.

Light shield layer 5 is arranged on second elastic layer 4, and light shield layer 5 is a hollow hole 51 at corresponding leaded light particle 15 places, and adjacent button 61 formed slits 63 are positioned on the light shield layer 5, to intercept the interference between the light.

Button group 6 is made up of a plurality of buttons 61, each button 61 all is to be made by the material with translucent effect, its surface is provided with numeral, literal or the symbol with translucent effect, the bottom is provided with adhesion layer 62, adhesion layer 62 is used to make button 61 to be covered on light shield layer 5, simultaneously adjacent button 61 formed slits 63 are positioned on the light shield layer 5, make light shield layer 5 can prevent that light from leaking from the slit, and it is better to make the printing opacity on the surface 611 of button 61 imitate light.

Luminescence component 7 is the light emitting diode of lateral direction light emission, has base 71 on it, has illuminating part 72 on the base 71, and illuminating part 72 is disposed at a side of second elastic layer 4.

Anti-dazzling screen 8 leaks to prevent light above between the luminescence component 7 and second elastic layer 3, makes light be able to the concentrated area simultaneously and imports in the light guide plate 1.

Fig. 8 is the schematic side view of Fig. 7, and Fig. 9 is the optical path synoptic diagram of Fig. 7.As shown in the figure, after the light 18 that the illuminating part 72 of luminescence component 7 is produced is entered by light guide plate 1, when light 18 process leaded light microstructures 15, leaded light microstructure 15 is with upwards projection of light 18, again through the hollow hole 51 of light shield layer 5 and light 18 can be projeced in the button group 6, allow the surface 611 of each button 61 all have translucent effect, make numeral, literal or the symbol on the surface 611 of button 61 can know demonstration.

Simultaneously, after button 61 is pressed by external force, the convex body 42 of second elastic layer 4 is pressed on the surface 311 of the thin shrapnel 31 of first elastic layer 3, metal clips 32 distortion are pressed on circuit board 2, circuit board 2 just produces signal, in the process of pressing keys 61, metal clips 32 can produce the snap sound, allows the feel effect of pressing keys 61 of user.

Figure 10 is the schematic side view of another embodiment of the present invention.As shown in the figure, disclosed press-key structure is identical haply with the disclosed press-key structure of Fig. 8 with Fig. 7 among this figure, and difference is that the leaded light microstructure 15 on the light guide plate 1 is for protruding from the semicircle protruding grain on light guide plate 1 surface.After light 18 is imported by light guide plate 1, leaded light microstructure 15 is assembled upwards projection with light 18, again through the hollow hole 51 of light shield layer 5, light 18 can be projeced in the button group 6, allow the surface 611 of each button 61 all have translucent effect, make numeral, literal or the symbol on the surface 611 of button 61 can know demonstration.

Figure 11 is the synoptic diagram of light guide plate of the present invention when being used on the mobile phone.As shown in the figure, light guide plate 1 of the present invention is disposed at the press-key structure inside of mobile phone 9, when mobile phone 9 is used, after light guide plate 1 imports light, when light process light-shielding structure 16, decay takes place and can not pass light-shielding structure 16 in light, so light guide zone 17 and 17 ' pairing button 61 will present the effect backlight of different color light.

Suppose that the light that light guide zone 17 imports is redness, and the light of light guide zone 17 ' imported is for green, can clearly be seen that on the key panel of mobile phone 9 button 61 of light-shielding structure more than 16 presents redness, and the button 61 of light-shielding structure below 16 presents green.So, on mobile phone 9, make some button group produce particular color, when the user carries out some operation (as playing games), just can not push the wrong the situation of button.

Figure 12 is the synoptic diagram of press-key structure of the present invention when being used for the automobile audio panel.As shown in the figure, the panel of press-key structure of the present invention can also be installed on the automobile audio panel 10 except can be used for mobile phone, uses control cold air conditioner system, audio-video system and satellite navigation system etc.

The above is the preferred embodiments of the present invention only, is not so promptly limits claim of the present invention, and every other equivalence of being done in characteristic range of the present invention changes or modifies, and all should be included in the claim of the present invention.

Claims

1. A light guide method for a backlight inside a button, comprising:

a), prepare light guide plate, described light guide plate is transparent and colorless PC film or PTU film;

b), forming a light-shielding structure on the transparent PC film or PTU film, and the light-shielding structure divides the PC film or PTU film into two light-guiding areas, the first light-guiding area and the second light-guiding area , the first light guide area has a block-shaped light guide part, a frame-shaped light guide part and a strip-shaped light guide part, and the second light guide area has a block-shaped light guide part, wherein the light-shielding The structure is composed of a plurality of perforations arranged in a chain in an adjacent and staggered manner; and

c) After the at least two light rays are respectively guided by the two light guide regions of the light guide plate, when the at least two light rays reach the light shielding structure, the two light rays entering the light shielding structure are attenuated, So that it is impossible to pass through the light-shielding structure, the two light rays formed on the two light guide areas respectively will not interfere with each other, and the two light rays are projected on the key.

2. The light guiding method for the internal backlight of the key according to claim 1, wherein the block-shaped light guiding part, the frame-shaped light guiding part and the strip-shaped light guiding part are composed of a plurality of light guiding microstructures .

3 . The light guide method for the backlight inside the button according to claim 2 , wherein the light guide microstructure is a semicircular concave hole or a bump protruding from the surface of the PC film or the PTU film. 4 .

4. A light guide plate structure inside the button, the light guide plate structure has a transparent and colorless PC film or PTU film, the PC film or PTU film has a block-shaped light guide part, a frame-shaped light guide part and a long The strip-shaped light guide part is provided with a light-shielding structure between the block-shaped light guide part, the frame-shaped light guide part and the strip-shaped light guide part, and the light-shielding structure combines the PC film or The PTU film is divided into two light guide areas, the first light guide area and the second light guide area, the first light guide area has a block-shaped light guide part, a frame-shaped light guide part and a strip-shaped light guide part , the second light guide area has a block-shaped light guide part, wherein the light shielding structure is composed of a plurality of perforations, and the plurality of perforations are arranged in a chain-like manner in an adjacent staggered manner.

5 . The structure of the light guide plate inside the key according to claim 4 , wherein the block-shaped light guide part guides light to a corresponding single key.

6 . The light guide plate structure inside the key according to claim 4 , wherein the frame-shaped light guide part guides light to a specific key group.

7. The light guide plate structure inside the key according to claim 4, wherein the strip-shaped light guide part guides light to the side edge of the PC film or the PTU film.

8 . The structure of the light guide plate inside the key according to claim 4 , wherein the block-shaped light guide part, the frame-shaped light guide part and the strip-shaped light guide part are composed of a plurality of light guide microstructures.

9. The light guide plate structure inside the key according to claim 8, wherein the light guide microstructure is a semicircular concave hole or a bump protruding from the surface of the PC film or the PTU film.

10. The light guide plate structure inside the button according to claim 4, wherein, two corners of one side and the other side of the PC film or the PTU film are provided with gaps, and the gaps have stepped The light refraction part; in addition, a light-emitting component is arranged on the position corresponding to the notch.

11. A button structure, comprising:

circuit board;

The first elastic layer is arranged on the circuit board, and has a thin film elastic sheet on it, and a metal elastic sheet attached to the thin film elastic sheet and configured correspondingly to the circuit board;

The second elastic layer is arranged on the first elastic layer, and it is composed of a light guide plate and an elastic body. The light guide plate is a transparent and colorless PC film or PTU film, and the PC film or PTU film has a block shaped light guide part, frame-shaped light guide part and strip-shaped light guide part, between the block-shaped light guide part, the frame-shaped light guide part and the strip-shaped light guide part A light-shielding structure, the light-shielding structure separates the PC film or the PTU film into two light-guiding areas, a first light-guiding area and a second light-guiding area, the first light-guiding area has a block-shaped light-guiding part, A frame-shaped light guide part and a strip-shaped light guide part, the second light guide area has a block-shaped light guide part, wherein the light-shielding structure is composed of multiple perforations, and the multiple perforations are staggered adjacent to each other Arranged in a chain-like manner; a plurality of convex bodies are formed on the elastic body, and the convex bodies correspond to the configuration of the metal shrapnel;

a light-shielding layer, which is arranged on the second elastic layer, and the light-shielding layer has hollow holes corresponding to the light-guiding particles; and

The button group is composed of a plurality of buttons, and there are light-transmitting numbers, characters or symbols on the surface of the buttons.

12. The key structure according to claim 11, wherein the circuit board is a thin film printed circuit board.

13. The key structure according to claim 11, wherein the thin film elastic piece is made of hard PC material.

14. The key structure according to claim 11, wherein the block-shaped light guiding part guides light to a corresponding single key.

15. The key structure according to claim 11, wherein the frame-shaped light guide guides light to a specific key group.

16. The key structure according to claim 11, wherein the strip-shaped light guiding part guides light to the side edge of the PC film or the PTU film.

17. The button structure according to claim 11, wherein the block-shaped light guide part, the frame-shaped light guide part and the strip-shaped light guide part are composed of a plurality of light guide microstructures.

18. The button structure according to claim 17, wherein the light guide microstructure is a semicircular concave hole or a bump protruding from the surface of the PC film or the PTU film.

19. The button structure according to claim 11, wherein, two corners of one side and the other side of the PC film or PTU film are provided with notches, and there is a step-shaped light refraction part in the notches .

20. The key structure according to claim 11, wherein the elastic body is made of soft PC material.

21. The key structure according to claim 11, wherein the key is made of light-transmitting material.

22. The key structure according to claim 11, wherein an adhesive layer is provided at the bottom of the key, and the adhesive layer is used to attach the key to the light-shielding layer.

23. The key structure according to claim 11, further comprising a light-emitting component, the light-emitting component being disposed on one side of the second elastic layer.

24. The button structure according to claim 23, further comprising a shading sheet, a part of the shading sheet is located above the light-emitting component, and a part is located above the space between the light-emitting component and the second elastic layer .