CN218585861U - Backlight module of luminous keyboard and keyboard - Google Patents

Abstract

The application relates to a backlight module of a light-emitting keyboard, which comprises a first composite film, a light guide film and a second composite film, wherein the light guide film is arranged on the first composite film, a plurality of LED lamps are arranged between the first composite film and the light guide film, the first composite film and the light guide film are provided with a plurality of corresponding through holes, and the LED lamps are arranged in the through holes in a penetrating manner, so that the first composite film and the light guide film can be smoothly attached together. The second complex film sets up on the leaded light membrane, and the through-hole is located the orthographic projection of second complex film at the leaded light membrane, and the second complex film can cover the through-hole, and then covers the inside LED lamp of wearing to locate the through-hole for light can not follow the through-hole and jets out, prevents to set up the position of LED lamp and crosses bright, and light on the key cap is inhomogeneous, guarantees that light can throw to each key cap through the leaded light membrane on, makes each key cap evenly shine. Compare traditional backlight unit, reduced the area of second complex film, saved raw materials for production, reduced manufacturing cost.

Description

Backlight module of luminous keyboard and keyboard

Technical Field

The application relates to the technical field of production of keyboard circuit films, in particular to a backlight module of a luminous keyboard and the keyboard.

Background

The keyboard is an instruction and data input device for operating computer equipment, and can input English letters, chinese characters, numbers, punctuations and the like into the computer through the keyboard, so as to send commands, input data and the like to the computer.

The keyboard receives the wide application as the input device of computer, along with the development of technique, sell the keyboard that has luminous button on the market at present, make the keyboard luminous through set up the LED lamp in the keyboard is inside, LED is the one-way lamp, need use the light shield layer earlier to shield the LED lamp light beam of a part reflector layer reflection, it is inhomogeneous to prevent LED lamp light beam, but present light shield layer covers whole leaded light layer almost, and can not directly print with the leaded light layer on, need print the light shield layer on the PET membrane earlier, the PET membrane that will print the light shield layer covers on the leaded light layer again, light shield layer structural area is too big, the repeatability shading, the production materials is extravagant, manufacturing cost is too high.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a backlight module of a light-emitting keyboard and a keyboard aiming at the problems of too large area of a light-shielding plate, waste of production materials, overhigh production cost and the like.

The application provides a backlight unit and keyboard of luminous keyboard adopts following technical scheme:

a backlight module of a luminous keyboard comprises a first composite film, a light guide film and a second composite film, wherein the light guide film is arranged on the first composite film, a plurality of LED lamps are arranged between the light guide film and the first composite film, the first composite film and the light guide film are provided with a plurality of corresponding through holes, and the LED lamps are arranged in the through holes in a penetrating mode; the second composite film is arranged on the light guide film, and the through hole is positioned in the orthographic projection of the second composite film on the light guide film.

Through adopting above-mentioned technical scheme, the leaded light membrane covers on first complex film, and the light beam of a plurality of LED lamps between leaded light membrane and the first complex film jets into the leaded light membrane, sees the light guide to each key cap of keyboard on through the leaded light membrane and sees through to illuminate the key cap, the light of LED lamp can be sheltered from to first complex film simultaneously, prevents that light from jetting out from the downside of leaded light membrane. The LED lamp is arranged in the through hole corresponding to the first composite film and the light guide film in a penetrating mode, so that the first composite film and the light guide film can be smoothly attached together. The second complex film can cover a plurality of through-holes for wear to locate the LED lamp in a plurality of through-holes and covered, prevent that the position that sets up the LED lamp from crossing bright, light on the key cap is inhomogeneous.

Traditional backlight unit, the shape of second complex film set to with the key cap looks adaptation of keyboard for the second complex film just can shelter from the clearance between the key cap, guarantees only that the key cap is evenly luminous, but does not directly cover the position that is provided with the LED lamp, and the second complex film need lay earlier on one deck PET membrane, and the PET membrane that will lay the second complex film again sets up on the light guide plate, and is provided with the keyboard film at backlight unit's upside, the keyboard film has possessed the same light-shading strip with the second complex film, the repeated shading of second complex film, needs more raw and other materials when this kind of backlight unit produces, and manufacturing cost is too high.

But backlight unit that this application provided only need with the shape setting of second complex film to can cover the LED lamp can, and need not lay the second complex film on the PET membrane, both removed the one deck PET membrane, still greatly reduced the area of second complex film, saved production raw and other materials, reduced backlight unit's manufacturing cost.

In an embodiment of the present application, the LED lamps define a light emitting area on the light guiding film, and an orthographic projection of the second composite film on the light guiding film completely coincides with the light emitting area.

Through adopting above-mentioned technical scheme, the LED lamp is luminous on sending out light zone, and the second complex film covers completely and sends out light zone for LED's light can't be penetrated away from sending out light zone, and has the leaded light membrane to derive the light of LED lamp evenly.

In an embodiment of the present application, the light emitting region is located in the middle of the light guiding film.

Through adopting above-mentioned technical scheme, send out the light zone and be located the leaded light membrane in the middle of can making the even scattering of light of LED lamp to send out the leaded light membrane of light zone both sides on to make the light that the leaded light membrane derived can throw to the key cap of keyboard uniformly on, make user experience feel good.

In an embodiment of the present application, the first composite film includes a first light shielding layer and a first reflective layer, and the first reflective layer is disposed on the first light shielding layer.

Through adopting above-mentioned technical scheme, first light shield layer shelters from the light that the LED lamp sent, prevents that light from overflowing from the downside of leaded light membrane, guarantees that light can only follow the leaded light membrane and jets out. The first reflecting layer can reflect light emitted by the LED lamp to the light guide film, and projects the light to the keycap through the light guide film, so that the keycap can shine, and the first reflecting layer can project the light to the maximum extent to the keycap through the light guide film, so that the brightness of the keycap is prevented from being insufficient, and the brightness of the keycap is improved.

In an embodiment of the present application, an area of the first light shielding layer is not smaller than an area of the first light reflecting layer.

Through adopting the above technical scheme, prevent that the light of LED lamp from passing through first reflector layer excessive, guarantee to throw the light on first reflector layer and can be sheltered from and can not be excessive by first light shield layer, and throw the light total reflection on first reflector layer and give the leaded light membrane, make the luminous flux in the leaded light membrane bigger, the light that the leaded light membrane was derived is brighter, more even, light is fully thrown to the key cap on, the light utilization ratio has been improved, reduce arranging of LED lamp, in order to prevent that the LED lamp is too much, arrange too densely and lead to the keyboard part to generate heat, influence user experience and feel, also can reduce the life of keyboard. And make full use of light can guarantee that key cap luminance is enough, need not to cross the multirow and establish the LED lamp for the keyboard keeps good heat dissipation function, improves user experience, reinforcing product life.

In an embodiment of the present application, the light guide film is provided with a light guide region.

Through adopting above-mentioned technical scheme, the light that the LED lamp sent can throw on the key cap that corresponds through leaded light region for every key cap evenly shines.

In an embodiment of the present application, an adhesive surface is disposed on a surface of the second composite film close to the light guide film.

Through adopting above-mentioned technical scheme, the second complex film prevents that the second complex film from breaking away from the leaded light membrane through pasting the face cover on the leaded light membrane, can't cover luminous zone completely, and leads to light excessive, and the key cap luminance is inhomogeneous. The adhesive surface enhances the stability of the second composite film covering the light guide film,

in an embodiment of the present application, the composite film further includes a waterproof film disposed on the second composite film.

Through adopting above-mentioned technical scheme for the second complex film has waterproof function, prevents that water from passing through the second complex film and entering into the LED lamp in, damaging the LED lamp. The waterproof film can ensure the normal use of the LED lamp, is not easy to be damaged, and reduces the maintenance rate of the luminous keyboard.

In an embodiment of the present application, one side that the first light shield layer is kept away from relatively the leaded light membrane is provided with the third light shield layer, the third light shield layer covers the through-hole.

Through adopting above-mentioned technical scheme, the third light shield layer covers the through-hole to prevent that light that the inside LED lamp of through-hole sent from passing through the through-hole is excessive, both improved light utilization ratio, also can make light all be thrown on the key cap, and can not spill over from the key cap below, influence user experience and feel.

A keyboard comprises the backlight module of the luminous keyboard.

To sum up, the technical scheme provided by the application has at least one of the following technical effects:

1. through setting up the second complex film on the leaded light membrane to cover the through-hole that is provided with the LED lamp completely, make light can not pass the through-hole and directly throw on the key cap, lead to luminous inhomogeneous on the keyboard, and can be distinguished from the traditional form of laying the second complex film on the large area, to a great extent has reduced backlight unit's production raw materials, has reduced backlight unit manufacturing cost.

2. Through setting up first light shield layer and first reflector layer, guarantee that light can not be excessive downwards to can utilize light by furthest, improve the light utilization ratio, can guarantee with the LED lamp of minimum quantity that the brightness of key cap is sufficient.

3. Through set up the light guide region on the leaded light membrane for the light that the LED lamp sent can throw on the key cap that corresponds through the light guide region, makes every key cap evenly shine.

Drawings

Fig. 1 is a schematic structural view of a backlight module of a light-emitting keyboard according to the present application;

FIG. 2 is a schematic view of the location of light emitting areas in some embodiments of the present application;

FIG. 3 is a schematic view of the position of a light guiding region in some embodiments of the present application;

FIG. 4 is a schematic representation of the structure of a second composite membrane in some embodiments of the present application.

Description of reference numerals:

10. a first composite film; 20. a light directing film; 30. an LED lamp; 40. a through hole; 50. a second composite film; 60. a water-resistant film; 70. a third composite film; 11. a first light-shielding layer; 12. a first light-reflecting layer; 21. a light guide region; 22. a light emitting region; 51. a sticking surface; 52. a second light-shielding layer; 53. a second light-reflecting layer; 71. a third light-shielding layer; 72. and a third light reflecting layer.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a backlight module of a light-emitting keyboard of the present application. The backlight module of the light-emitting keyboard provided by the embodiment of the application comprises a first composite film 10, a light guide film 20 and a second composite film 50, wherein the light guide film 20 is arranged on the first composite film 10, a plurality of LED lamps 30 are arranged between the first composite film 10 and the light guide film 20, the first composite film 10 and the light guide film 20 are provided with a plurality of corresponding through holes 40, the LED lamps 30 are arranged in the through holes 40 in a penetrating manner, so that the first composite film 10 and the light guide film 20 can be smoothly attached together. Second complex film 50 sets up on leaded light membrane 20, and through-hole 40 is located second complex film 50 in the orthographic projection of leaded light membrane 20, second complex film 50 can cover through-hole 40, and then the LED lamp 30 of 5 portions in the through-hole 40 is worn to locate by the cover, make light can not follow through-hole 40 and jet out, the position that prevents to set up LED lamp 30 is bright, light on the key cap is inhomogeneous, guarantee that light can throw to each key cap through leaded light membrane 20, make each key cap evenly luminous.

In the embodiment, the LBD lamps are unidirectional lamps, and the light irradiation directions of two adjacent LED lamps 30 are opposite, so that the light guiding films 20 on two sides of the LED lamps 30 receive the same amount of light.

Referring to fig. 2, fig. 2 is a schematic view illustrating a position of a light emitting region 22 according to some embodiments of the present application. The irregular arrangement of LED lamp 30 wears to locate in the through-hole 40 of first complex film 10 and leaded light membrane 20, a plurality of LED lamps 30 define on leaded light membrane 20 and form and send out light zone 22, the shape that sends out light zone 22 is corresponding with the range of LED lamp 30, orthographic projection and the luminous zone 22 coincidence of second complex film 50 on leaded light membrane 20, the light that can block LED lamp 30 just directly upwards jets out, make LED's light can't jet out from sending out light zone 22, and then make light only jet out from the edgewise, light gets into between first complex film 10 and the leaded light membrane 20, throw light to the key cap of upside by leaded light membrane 20 on, make the key cap evenly luminous.

The light emitting area 22 is located in the middle of the light guide film 20, so that light of the LED lamp 30 is uniformly scattered onto the light guide films 20 on two sides of the light emitting area 22, the luminous fluxes on the light guide films 20 on two sides of the LED lamp 30 are consistent, light guided out by the light guide films 20 can be uniformly projected onto key caps of the keyboard, the condition of uneven brightness of the keyboard cannot occur, and the user experience feeling is improved.

Because separate it through keyboard frame between current keyboard key cap and the key cap to can shelter from the light of downside, so backlight unit can change its shape, reduces backlight unit's area. This application jumps out traditional backlight unit's thinking frame, follow the clearance of sheltering from between each key cap so that each key cap evenly luminous change into directly shelters from luminous department and make light all inject into leaded light membrane 20, finally derive by leaded light membrane 20. The backlight module area of this application reduces, has saved production raw and other materials, has reduced backlight module's manufacturing cost.

Referring to fig. 3, fig. 3 is a schematic position diagram of the light guiding region 21 according to some embodiments of the present application. Specifically, in the embodiment, the light guiding film 20 is provided with the light guiding region 21, the light guiding region 21 corresponds to the position of the key cap, and the light is projected onto the corresponding key cap through the light guiding region 21 after being incident into the light guiding film 20, so that the key cap can uniformly emit light.

The first composite film 10 is used for shielding light, preventing the light from overflowing, and reflecting the light to the light guiding film 20,5 to improve the light utilization rate. Specifically, the first composite film 10 includes a first light shielding layer 11 and a first reflective layer 12, the first reflective layer 12 is laid on the first light shielding layer 11, and the first reflective layer 12 is in direct contact with the light guiding film 20. The first reflecting layer 12 can reflect light emitted by the LED lamp 30 to the light guide film 20, and the first shading layer 11 prevents the light from overflowing, so that the light is completely projected to the light guide film 20.

In an embodiment, the area of the first light shielding layer 11 is not smaller than the area of the first light reflecting layer 12, so that the light of the 10LED lamp 30 can be prevented from overflowing through the first light reflecting layer 12 without being shielded by the first light shielding layer 11. The area of first reflector layer 12 equals with leaded light membrane 20's area, make first reflector layer 12 can reflect light on leaded light membrane 20 completely, make the luminous flux in the leaded light membrane 20 bigger, the light that leaded out of leaded light membrane 20 is brighter, more even, light is fully thrown to the key cap on, the light utilization ratio has been improved, reduce arranging of LED lamp 30, prevent that LED lamp 30 arranges too densely to lead to the keyboard local to generate heat, improve user experience and feel, also can prolong the life of keyboard.

Referring to fig. 4, fig. 4 is a schematic diagram of a second composite membrane 50 according to some embodiments of the present disclosure. The second composite film 50 is used for shielding the LED lamp 30 penetrating through the through hole 40, so that light is uniformly projected onto the light guide films 20 at two sides of the LED lamp 30. Specifically, the second composite film 50 includes a second light-shielding layer 52 and a second reflective layer 53, the second light-shielding layer 52 and the second reflective layer 53 have the same shape and the same area, the light-emitting region 22 is shielded by the second light-shielding layer 52, and the light in the light-emitting region 22 is reflected to the light-guiding film 20 by the second reflective layer 53, so as to prevent the light from overflowing from the through hole 40, and thus, each keycap can uniformly emit light.

In the embodiment, an adhesive surface 51 is disposed on a side of the second composite film 50 close to the light guide film 20, and the second composite film 50 covers the light guide film 20 through the adhesive surface 51, so as to prevent the second composite film 50 from separating from the light guide film 20 and failing to completely cover the light emitting region 22, which may cause light overflow and uneven brightness of the keycap. And adhesive side 51 enhances the stability of second composite film 50 over light directing film 20.

Referring to fig. 1, the backlight module of the light-emitting keyboard further includes a waterproof film 60. Specifically, the waterproof film 60 is disposed on the second composite film 50, and prevents water from penetrating through the second composite film 50 into the LED lamp 30, thereby damaging the LED lamp 30. The waterproof film 60 can protect the LED lamp 30 to extend the life span of the LED lamp 30.

The backlight assembly of the light emitting keyboard further includes a third composite film 70, and the third composite film 70 is used to provide a mounting base for the LED lamp 30 and prevent light from being emitted from the through-hole 40. Specifically, the third complex film 70 covers the through-hole 40. The third composite film 70 includes a third light-shielding layer 71 and a third light-reflecting layer 72, the third light-shielding layer 71 is the same as the third light-reflecting layer 72 in shape, and the areas are equal, the third light-shielding layer 71 shields the light emitted from the through hole 40, and the second light-reflecting layer 53 reflects the light at the through hole 40 to the light-guiding film 20, so as to prevent the light from overflowing from the through hole 40, the second light-reflecting layer 53 reflects the light on the light-guiding film 20 together with the third light-reflecting layer 72, thereby further improving the light utilization rate, and ensuring the sufficient brightness of the keycap.

An embodiment of the present application provides a keyboard, including the backlight module of the light-emitting keyboard as described above.

The application provides a backlight unit of luminous keyboard and keyboard's implementation principle does: the light guide film 20 and the first composite film 10 have a plurality of corresponding through holes 40, and the LED lamp 30 is disposed in the middle of the light guide film 20 and in the through holes 40, so as to ensure that the light quantity of the LED lamp 30 is consistent on both sides. The plurality of LED lamps 30 define and form the light emitting area 22 on the light guide film 20, and the second composite film 50 completely covers the light emitting area 22, so that the light of the LED lamps 30 can only be emitted out of the light guide films 20 on two sides, and the light is guided out of the light guide films 20 to the keycap, so that the keycap can shine. The area that sends out light zone 22 is less for the area of leaded light membrane 20, need not to set up on leaded light membrane 20 with keyboard assorted backlight unit, this application directly covers send out light zone 22, lead to light by the light zone 21 on the leaded light membrane 20 on the key cap with light can, saved production raw and other materials, reduced the cost of product production.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediary. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A backlight module of a light-emitting keyboard is characterized by comprising:

a first composite film (10);

the light guide film (20) is arranged on the first composite film (10), a plurality of LED lamps (30) are arranged between the light guide film (20) and the first composite film (10), the first composite film (10) and the light guide film (20) are provided with a plurality of corresponding through holes (40), and the LED lamps (30) penetrate through the through holes (40);

a second composite film (50) disposed on the light directing film (20), the via (40) being located within an orthographic projection of the second composite film (50) on the light directing film (20).

2. The backlight module of claim 1, wherein the plurality of LED lamps (30) define a light-emitting area (22) on the light guiding film (20), and an orthographic projection of the second composite film (50) on the light guiding film (20) is completely coincident with the light-emitting area (22).

3. The backlight module of claim 2, wherein the light emitting region (22) is located in the middle of the light guiding film (20).

4. The backlight module of the light-emitting keyboard according to claim 1, wherein the first composite film (10) comprises a first light shielding layer (11) and a first light reflecting layer (12), and the first light reflecting layer (12) is disposed on the first light shielding layer (11).

5. The backlight module of claim 4, wherein the area of the first light shielding layer (11) is not smaller than the area of the first light reflecting layer (12).

6. The backlight module of the light-emitting keyboard of claim 1, wherein the light guiding film (20) is provided with a light guiding region (21).

7. The backlight module of claim 1, wherein an adhesive surface (51) is disposed on a surface of the second composite film (50) adjacent to the light guide film (20).

8. The backlight module of claim 1, further comprising a waterproof film (60), wherein the waterproof film (60) is disposed on the second composite film (50).

9. The backlight module of the light-emitting keyboard according to claim 4, wherein a third light shielding layer (71) is disposed on a side of the first light shielding layer (11) relatively far from the light guiding film (20), and the third light shielding layer (71) covers the through hole (40).

10. A keyboard comprising a backlight module of the illuminated keyboard of any one of claims 1-9.

Images