CN205004228U - Structure of thin backlight module - Google Patents

Abstract

The utility model relates to a structure of thin type backlight module, this backlight module includes the basement membrane board of range upon range of form, central authorities ' membrane group and top diaphragm board, and basement membrane board can be made for the polyester film of insulating material, and then it is equipped with central authorities ' membrane group to fold above the basement membrane board, then central authorities ' module is equipped with the luminescent layer that is range upon range of form, insulating layer and conducting layer etc, again in the range upon range of top diaphragm board of central authorities ' membrane group top, be equipped with the elastic layer that supplies key switch to press again in the top surface, need not to design the broken hole, complete driving fit has, the good speciality of waterproof nature, utilize range upon range of form to combine shaping backlight module promptly, can reduce backlight module's thickness, it is light more to accord with the electronic product, it is thin, short, little design appeal, and reach the purpose that makes.

Description

Structure of thin backlight module

technical field

The utility model provides a structure of a thin backlight module, especially a backlight module with reduced thickness and water resistance. The central module is provided with a light-emitting layer through a laminated bottom film board, a central module and a top film board. Moreover, the overall thickness of the backlight module can be reduced through the laminated combination, and the purpose of tight combination and waterproof property can be achieved.

Background technique

With the development of the era of science and technology, various electronic and electrical products have been widely used in people's life or work environment, regardless of the application of desktop computers or notebook computers, it brings convenience to people's life and work. , for example, all kinds of word processing, editing and processing of photos or graphics, presentations, e-mails or Internet applications, etc., are all modes that people often use, which also makes the application of computer products more popular, and various electronic products are carried out through computers. During operation, the required data must be input one by one through the keyboard, so that the host computer can process according to the data input by the keyboard, and the keyboard has also become a necessary tool for computer operations, and it is becoming more and more popular in computers and various peripheral products. Made with light, thin, short, and small design concepts, the use function is also improved, especially the design of the notebook computer, the overall thickness is also reduced, so that the thickness of the screen and keyboard is also reduced to a certain extent, and the keyboard is relatively reduced. The early large-scale structure has been transformed into a thin panel model, and a luminous body is installed inside the keyboard to transmit light from the periphery of the keyboard or the key surface, so that the position of each key can be clearly identified when the keyboard is used, and the keyboard structure is in multiple A light-shielding layer, a light-guiding layer, and a reflective layer are assembled in sequence at the bottom of the button. A plurality of luminous bodies are used to project a light source on the circuit board located on the light-guiding layer. The reflective layer is reflected upwards and covered by the light-shielding layer to provide a light source. Gathering and projecting upward toward the bottom of each keyboard, light can be transmitted on the keyboard surface or surroundings, and the backlight reflective layer composed of a light-shielding layer, a light-guiding layer and a reflecting layer, the light-guiding layer connects multiple The light source projected by the illuminant is guided to the entire light guide layer, and then reflected through the reflective layer toward the light-shielding layer, and the light source is projected upwards from a plurality of slots on the light-shielding layer, so that the light source is installed above each slot If multiple keys are projected, the backlight module must have a certain thickness, so that the luminous body can be combined between the light guide layer and the light layer, so the thickness of the backlight module cannot be further reduced, which is not conducive to the design appeal of thin keyboard.

In order to solve the problem that the thickness of the keyboard backlight module cannot be reduced, the industry uses electroluminescence (EL) as the light source of the backlight module, and then drives the light through an external electric field (ELectroluminescent), as shown in Figure 6, which is US Patent No. US8089015 According to the existing keyboard backlight module, the backlight module of the prior art is that the key switch layer A and the EL layer B are respectively arranged on the upper and lower layers of the substrate C, and the substrate C can be a transparent plate or an opaque stainless steel plate , and set perforations in the stainless steel plate, so that the bright light of the cold light layer B can be projected to the position of the key switch layer A through the substrate C. However, due to the cumbersome processing and assembly operations, the reduction in the thickness of the backlight module is not much, and it still exists in practical applications. Many deficiencies; as shown in Figure 7, the existing keyboard backlight module of the U.S. Patent No. US8089015 is to separate and set the button switch layer A and the luminescent layer B, and then merge them into the button luminescent layer D to form a multi-layer composite. One type is used to achieve a thinner design, but the luminescent layer D of the button is combined with an insulating layer, a conductive layer, a light-emitting layer, and a wire layer D1 through lamination, and the wire layer D1 is exposed on the surface of the luminescent layer D of the button. During use, it is easy to cause water vapor and humidity to infiltrate, affecting the wire layer D1 of the luminescent layer D of the button to get wet and malfunction, and the purpose of waterproofing cannot be achieved. There are still many shortcomings and inconveniences that need to be improved.

Therefore, how to solve the problem and trouble of reducing the thickness of the keyboard backlight module to meet the design requirements of light, thin, short, and small electronic products, and after reducing the thickness of the keyboard backlight module, but due to the setting of the hole between the layers The lack and trouble of assembling buttons without waterproof function is the direction that relevant manufacturers engaged in this industry are eager to study and improve.

Utility model content

In view of the above-mentioned problems and deficiencies, the creators collected relevant information, evaluated and considered in many ways, and based on years of experience accumulated in this industry, after continuous trial and modification, they designed this kind of backlight module. The laminated combination of the template, the central module and the top film board, and the laminated combination of the central module through the conductive layer, insulating layer, luminescent layer, etc., can reduce the overall thickness of the backlight module, and achieve a tightly bonded, waterproof thin The utility model patent for the structure of the shaped backlight module was born.

The main purpose of the utility model is to provide a structure of a thin backlight module, which includes a laminated bottom film plate, a central film group and a top film plate, and the bottom film plate can be a polyester film of insulating material ( Mylar), and a central film group is stacked above the bottom film plate, and the central module is provided with a stacked light-emitting layer, an insulating layer, and a conductive layer, etc., which are stacked and assembled in sequence, and then placed on the central film group The upper laminated top film board is also made of insulating material, and an elastic layer for pressing the key switch is arranged on the outer surface of the top.

In a preferred embodiment, the bottom film board is made of insulating polyester film (Mylar).

In a preferred embodiment, the central film group is sequentially stacked with a first conductive layer, a first insulating layer, a light-emitting layer, a second conductive layer and a second insulating layer on the bottom film plate, so that the second insulating layer The bottom surface of the top membrane plate attached to the relatively elastic layer is provided with a conduction circuit layer for pressing the key switch.

In a preferred embodiment, the first conduction layer is made of silver paste and has a thickness of 0.01 mm to 0.05 mm; the first insulating layer and the second insulating layer are both UV adhesive layers, and the thickness is 0.01 mm to 0.05 mm. ; The luminescent layer is made of phosphorous or zinc sulfide (ZnS) material, which is formed by printing and processing, and the thickness is 0.01mm ~ 0.05mm; the second conductive layer is a transparent electrode, composed of anisotropic conductive film (ACF, AnisotropicConductiveFilm) or a transparent electrode made of vacuum sputtered indium tin oxide (ITO) transparent conductive film, and its thickness is also 0.01 mm to 0.05 mm.

In a preferred embodiment, the central film group is sequentially stacked with a first conductive layer, a first insulating layer, a light-emitting layer and a second conductive layer above the bottom film plate, so that the second conductive layer can be attached to the opposite The bottom surface of the top membrane plate of the elastic layer.

In a preferred embodiment, the first conductive layer is made of silver paste material with a thickness of 0.01 mm to 0.05 mm; the first insulating layer is a UV adhesive layer with a thickness of 0.01 mm to 0.05 mm; the light emitting layer is made of phosphorus or Zinc sulfide (ZnS) material is printed and processed to form a cold light sheet (EL), and the thickness is 0.01mm to 0.05mm; the second conductive layer is a transparent electrode, made of anisotropic conductive film (Anisotropic ConductiveFilm, ACF) or vacuum The thickness of the transparent electrode made of sputtered indium tin oxide (ITO) transparent conductive film is also 0.01mm-0.05mm.

In a preferred embodiment, the top film board is made of polyester film (Mylar) made of insulating material, and an elastic layer is arranged on the top outer surface, and the elastic layer is made of rubber material into a dome shape for pressing buttons. The switch is elastically reset through the elastic layer after being pressed and held.

Beneficial effects of the utility model: the utility model does not need to design holes, and has the characteristics of complete tightness and good waterproof performance, that is, the backlight module is formed by lamination, which can reduce the thickness of the backlight module, and is more in line with the lightness, thinness and flexibility of electronic products. Short and small design appeals, and achieve the purpose of reducing the overall thickness of the backlight module and having waterproof performance, and improving its reliability.

The secondary purpose of the present utility model is that the central film group of the backlight module is stacked with the first conducting layer, the first insulating layer, the light-emitting layer, the second conducting layer and the second insulating layer above the bottom film board. Layer, and then attach the second insulating layer to the conduction circuit layer set at the bottom of the top film board, and each stacked layer of the central film group has a thickness of 0.01 mm to 0.05 mm, which can effectively reduce the overall thickness of the backlight module. In addition, the laminated central membrane group and the bottom membrane plate and the top membrane plate are also closely connected without gaps, and good water resistance can also be achieved.

Another object of the present invention is that the central film group of the backlight module is to stack the first conduction layer, the first insulating layer, the light-emitting layer and the second conduction layer sequentially above the bottom film plate, and then place the first The two conductive layers are attached to the bottom of the top film plate, and each stacked layer of the central film group has a thickness of 0.01mm ~ 0.05mm, which can effectively reduce the overall thickness of the backlight module, and the laminated central film group and the bottom film plate , The top membrane plates are also tightly closed, without gaps, and can also achieve good water resistance.

Another purpose of the present utility model is that the first conductive layer of the central membrane group can be made of silver paste material; the first insulating layer or the second insulating layer can be UV adhesive layer respectively; Phosphorus or zinc sulfide (ZnS) material is printed and processed to form a cold light sheet (EL); the second conductive layer can be a transparent electrode, using anisotropic conductive film (ACF, Anisotropic Conductive Film) or vacuum sputtered indium tin oxide (ITO) transparent electrodes made of transparent conductive film; and the thickness of each stacked layer of the central film group can be 0.01mm ~ 0.05mm respectively, to achieve the purpose of reducing the thickness of the backlight module and having a good waterproof effect.

Description of drawings

Fig. 1 is a three-dimensional appearance view of the utility model.

Fig. 2 is a side sectional view of the first embodiment of the utility model.

Fig. 3 is a side sectional view of the pressed state of the first embodiment of the utility model.

Fig. 4 is a side sectional view of the second embodiment of the present invention.

Fig. 5 is a side sectional view of the pressed state of the second embodiment of the present invention.

FIG. 6 is a side sectional view of a conventional backlight module.

FIG. 7 is a side sectional view of another conventional backlight module.

【Symbol Description】

1. Bottom film plate

11. The conduction layer of the bottom film plate

2. Central membrane group

21. Conduction layer

211. First conduction layer

2111. Lower electrode

212. Second conduction layer

2121. Second Upper Electrode

22. Insulation layer

221. First insulating layer

222. Second insulating layer

23. Light-emitting layer

3. Top membrane plate

31. Elastic layer

32. Conduction circuit layer

321. First Upper Electrode

33. Button

A. Button switch layer

B. Luminescent layer

C. Substrate

D. Button cold light layer

D1, wire layer

detailed description

In order to achieve the above purpose and effect, the technical means adopted by the utility model and its structure, implementation method, etc., are hereby drawn in detail with respect to the preferred embodiments of the utility model and its features and functions are as follows to facilitate a complete understanding.

Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, and Fig. 5, which are respectively the perspective view of the utility model, the side sectional view of the first embodiment, and the side sectional view of the pressed state of the first embodiment , the side view sectional view of the second embodiment, the side view sectional view of the pressing state of the second embodiment, it can be clearly seen from the figure that the keyboard backlight module of the present utility model includes a bottom membrane plate 1, a central membrane group 2 And the top membrane plate 3, wherein:

The bottom film plate 1 can be made of insulating polyester film (Mylar).

The central film group 2 is a multi-layer thin film, and is provided with a conductive layer 21 , an insulating layer 22 , a light emitting layer 23 and the like stacked and combined.

The top membrane plate 3 can also be made of a polyester film (Mylar) of insulating material, and the outer surface above is provided with an elastic layer 31, and the elastic layer 31 can be made of a rubber material into a domed convex bowl shape (Rubber Dome).

When the above-mentioned components are assembled, they are sequentially stacked on the top of the bottom film plate 1 to combine the central module 2 and the top film plate 3, and each stacked layer of the central film group 2 is 0.01 mm to 0.05 mm, which can reduce the overall backlight module. Thickness and stacked combination have the purpose of sealing effect, and can pass through the bottom membrane plate 1, the central membrane group 2 and the top membrane plate 3 to form the structure of the thin backlight module of the present invention.

The above-mentioned central film group 2 can integrally form the bottom film plate conduction layer 11 and the first conduction layer 211 on the bottom film plate 1 upper surface, and then form the bottom film plate conduction layer 11 and the first conduction layer 211. Above, the first insulating layer 221, the light-emitting layer 23, the second conductive layer 212, the second insulating layer 222, etc. are stacked in sequence, and then the second insulating layer 222 is attached to the top film plate 3 of the relatively elastic layer 31 The bottom surface of the top film board 3 is provided with a conductive circuit layer 32. The conductive circuit layer 32 can be made of materials such as silver paste or carbon film, so that the second insulating layer 222 can be stacked and bonded to the conductive circuit. The surface of one side of the circuit layer 32; and the conductive layer 11 and the first conductive layer 211 of the bottom film plate can be formed by a silver paste material through a one-time processing process, and the thickness can be 0.01 mm to 0.05 mm; the first insulating layer 221 or the second insulating layer 222, then it can be the insulating layer 22 made of UV glue, and its thickness can be 0.01mm ~ 0.05mm; as for the light emitting layer 23, it contains phosphorus or zinc sulfide (ZnS) material, etc., and is transparent The cold light sheet (EL) formed by printing can have a thickness of 0.01 mm to 0.05 mm; the second conductive layer 212 can be a transparent electrode, and the oxidation layer is formed by using an anisotropic conductive film (Anisotropic Conductive Film, ACF) or vacuum sputtering. Indium tin (ITO), etc., transparent electrodes made of transparent conductive films, the thickness can also be 0.01mm ~ 0.05mm; the thickness of each stacked layer can be 0.01mm ~ 0.05mm and other dimensions for stacking and bonding. The overall thickness of the central membrane group 2 is effectively reduced, and the button 33 can be directly installed on the top of the elastic layer 31 of the top membrane plate 3, so that the tight stacking combination between the bottom membrane plate 1, the central membrane group 2 and the top membrane plate 3 can be maintained, It is not easy to be infiltrated by water vapor or moisture, etc., so as to avoid the conduction layer 21 of the central membrane group 2, the light-emitting layer 23 or the conduction circuit layer 32 of the top membrane plate 3 from being damp, so as to achieve the purpose of having a good waterproof effect and improve its reliability. Spend.

When the button 33 above the top membrane plate 3 is pressed by an external force, the button 33 can be used to press the elastic layer 31 to press the top membrane plate 3 downward, and then the top membrane plate 3 and the first upper electrode 321 of the conductive circuit layer 32 are directed toward the top membrane plate 3. Pressing down to contact the conduction layer 11 of the bottom film can form the conduction circuit layer 32 and the conduction layer 11 of the bottom film in a state of electrical conduction, so as to achieve the purpose of transmitting the signal of the button 33 .

In addition, the above-mentioned central membrane group 2 can be integrally formed with the first conductive layer 211 and the lower electrode 2111 on the upper surface of the bottom membrane plate 1, and then stacked sequentially on the first conductive layer 211 and the lower electrode 2111. There are a first insulating layer 221, a light emitting layer 23, a second conducting layer 212, and a second upper electrode 2121. The second conducting layer 212 and the second upper electrode 2121 are also formed in one process, and then the second The conduction layer 212 and the second upper electrode 2121 are attached to the bottom surface of the top film plate 3 of the relative elastic layer 31; The thickness can be 0.01mm～0.05mm; the first insulating layer 221 can be the insulating layer 22 made of UV glue, and its thickness can be 0.01mm～0.05mm; as for the light-emitting layer 23, it is phosphorus or zinc sulfide (ZnS ) materials, etc., and then processed through printing to form an EL film, and the thickness can be 0.01mm to 0.05mm; the second conductive layer 212 and the second upper electrode 2121 can be transparent electrodes, which can be formed after a single processing process. Forming, using anisotropic conductive film (Anisotropic Conductive Film, ACF) or vacuum sputtered indium tin oxide (ITO), etc., the transparent electrode made of transparent conductive film, the thickness can also be 0.01mm ~ 0.05mm; through each stack The thickness of the layers can be 0.01mm-0.05mm and other dimensions for stacking and combining, which can effectively reduce the overall thickness of the central membrane group 2, and the button 33 can be directly installed on the top of the elastic layer 31 of the top membrane plate 3, which can keep the bottom Diaphragm 1, central membrane group 2 and top membrane 3 are tightly stacked and combined, and the bottom membrane conductive layer 11 of the bottom membrane 1, the conductive layer 21 of the central membrane group 2, the light-emitting layer 23, etc. are covered Covering the bottom membrane plate 1 and the top membrane plate 3 to form a sealed state, it is difficult for water vapor and moisture to penetrate into the central membrane group 2, and can effectively achieve the purpose of having a good waterproof effect.

Then when the button 33 above the top membrane plate 3 is pressed by external force, the button 33 can be used to press the elastic layer 31 to press the top membrane plate 3 downward, and then the top membrane plate 3 and the second conductive layer 212 and the second upper electrode 2121 Press and contact the lower electrode 2111 of the first conduction layer 211 downwards to form an electrical conduction state between the second upper electrode 2121 of the second conduction layer 212 and the lower electrode 2111 of the first conduction layer 211 , in order to achieve the purpose of transmitting the signal of the button 33.

Therefore, the above description is only a preferred embodiment of the present utility model, and is not intended to limit the patent scope of the present utility model. The structure of the thin backlight module of the present utility model can be sequentially stacked on the top of the bottom film plate 1 and combined with the central The film group 2 and the top film plate 3, and the central film group 2 includes a conductive layer 21, an insulating layer 22, and a light-emitting layer 23 etc. stacked in sequence, and the central film group 2 is coated on the bottom film plate 1, The inside of the top film plate 3 can achieve the purpose of reducing the overall thickness of the backlight module and also has a good waterproof effect, which can meet the needs of the design concept of light, thin, short, and small electronic products. The bottom film plate 1 and the top film plate 3 Coating the conduction layer 21 of the central membrane group 2, the luminous layer 23 and the conduction circuit layer 32 of the top membrane plate 3, etc., so as not to be exposed, but to avoid the infiltration of water vapor or moisture, so that the backlight module has a waterproof Therefore, all structures and devices that can achieve the aforementioned effects should be covered by the utility model, and such simple modifications and equivalent structural changes should be included in the patent scope of the utility model in the same way , together with Chen Ming.

Therefore, the utility model is mainly designed for the structure of the thin backlight module. It uses the bottom film plate, the central film group and the top film plate to combine through stacking, so that the conduction layer and the light-emitting layer of the central film group are covered. Wrapped between the bottom film board and the top film board, it can reduce the overall thickness of the backlight module and have a good waterproof effect. Shaped backlight module, which only reduces the thickness of the backlight module, can meet the design requirements of light, thin, short and small electronic products, and can be used for the central film group to be wrapped between the bottom film plate and the top film plate, which is not easy to be exposed Infiltration of water vapor or humidity can form a waterproof effect, but the above description is only a preferred embodiment of the utility model, and it does not limit the scope of the utility model patent. The simple modifications and equivalent structural changes made in the content of the drawings and drawings should be included in the scope of the patent of the utility model in the same way, and are hereby declared.

To sum up, the structure of the above-mentioned thin backlight module of the present utility model can really achieve its effect and purpose during practical application and implementation. Therefore, the utility model is a research and development with excellent practicability, in order to comply with the new patent Subsequent application requirements shall be filed in accordance with the law.

Claims (7)

1. The structure of a thin backlight module is characterized in that it comprises a bottom film plate, a central film group and a top film plate, wherein: The base film plate is made of insulating material; The central film group is stacked above the bottom film plate, and is provided with a stacked conduction layer, an insulating layer and a light-emitting layer; and The top membrane board is laminated on the top of the central membrane group, and is also made of insulating material, and the top outer surface is provided with an elastic layer for pressing the key switch. 2 . The structure of the thin backlight module according to claim 1 , wherein the bottom film plate is made of insulating polyester film. 3 . 3. The structure of the thin backlight module according to claim 1, wherein the central film group is sequentially stacked with a first conducting layer, a first insulating layer, a light-emitting layer, a second The conduction layer and the second insulation layer, and the bottom surface of the top membrane board for the second insulation layer to be attached to the relatively elastic layer, and the bottom surface of the top membrane board is provided with a conduction circuit layer for pressing the key switch. 4. The structure of the thin backlight module according to claim 3, wherein the first conductive layer is made of silver paste and has a thickness of 0.01 mm to 0.05 mm; the first insulating layer and the second insulating layer Both are UV adhesive layers, and the thickness is 0.01mm~0.05mm; the light-emitting layer is a cold light sheet made of phosphorous or zinc sulfide material, which is formed by printing, and the thickness is 0.01mm~0.05mm; the second conductive layer is transparent The electrode, the transparent electrode made of anisotropic conductive film or vacuum sputtered indium tin oxide transparent conductive film, its thickness is also 0.01mm ~ 0.05mm. 5. The structure of the thin backlight module according to claim 1, wherein the central film group is sequentially stacked with a first conducting layer, a first insulating layer, a light-emitting layer and a second The conduction layer, and the second conduction layer is attached to the bottom surface of the top membrane plate of the relative elastic layer. 6. The structure of the thin backlight module as claimed in claim 5, wherein the first conductive layer is made of silver paste material and has a thickness of 0.01 mm to 0.05 mm; the first insulating layer is a UV adhesive layer, Its thickness is 0.01mm～0.05mm; the light-emitting layer is a cold light sheet formed by printing and processing of phosphorous or zinc sulfide material, and the thickness is 0.01mm～0.05mm; the second conduction layer is a transparent electrode, formed by anisotropy The thickness of the transparent electrode made of a conductive thin film or a vacuum sputtered indium tin oxide transparent conductive film is also 0.01 mm to 0.05 mm. 7. The structure of the thin backlight module as claimed in claim 1, wherein the top film is made of polyester film of insulating material, and an elastic layer is arranged on the outer surface of the top, and the elastic layer is made of rubber. It is in a dome shape for elastic reset through the elastic layer after the key switch is pressed and supported.