CN104795268A - Structure for backlight modules - Google Patents
Structure for backlight modules Download PDFInfo
- Publication number
- CN104795268A CN104795268A CN201410018841.5A CN201410018841A CN104795268A CN 104795268 A CN104795268 A CN 104795268A CN 201410018841 A CN201410018841 A CN 201410018841A CN 104795268 A CN104795268 A CN 104795268A
- Authority
- CN
- China
- Prior art keywords
- reflection sheet
- white reflection
- guide plate
- light guide
- backlight module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
A structure for backlight modules comprises at least one light guide plate, a non-transparent white reflective film which is provided with a plurality of electrical switching circuits and folds to coat the at least one light guide plate, and at least one light emitting unit which is arranged under the at least one light guide plate to make a light source go into the at least one light guide plate, wherein the incident light source transmits light through a light source transmission channel formed by folding the white reflective film. According to the invention, conductive silver paste can be printed directly on the white reflective film, and there is no need to separately add a shielding layer to the non-transparent area. Moreover, the light source can transmit light through the light source transmission channel formed by folding the white reflective film, which is helpful for thinning a backlight module and simplifying the process.
Description
Technical field
The invention belongs to a kind of technical field of backlight module, espespecially a kind of structure of backlight module, conductive silver paste directly can be printed on white reflection sheet, the light source conduction pathway that light source also can utilize this white reflection sheet to turn down to be formed again transmits light, contribute to the slimming of backlight module, and can processing procedure be simplified.
Background technology
Film key switch is applicable to palpus key-press input and the various machines having IC to control, as computer, electronic scale, computor-keyboard, mobile phone, various Mechanical course panel, remote control switch etc., commonly use film key switch be made up of three films, respectively by the cathode circuit of the top, bottom be cathode traces and middle be nonconducting sheet.Then put pressing module again, when pointing from the pressure of pressing module, top will contact energising with underlying film, namely completes conducting.
Circuit board on film key switch uses conductive silver paste for the electric conducting material of printing, polyethylene terephthalate (Polyethylene terephthalate is printed on via screen printing, be called for short PET) on polyester film or other film substrates, then this argentiferous constituent is toasted more than 1 hour with the oven for baking dry solidification between 150 DEG C to 250 DEG C, thus form this circuit system layer.Generally commonly using conductive silver paste is baking-type silver slurry, and substrate is epoxy resin, when dispatching from the factory by curing agent mixing wherein, as long as run into high heat, and usually need reach about 150 DEG C just meeting is initial and glue together.But high-temperature baking can cause the circuit on film key switch to produce shrink for a long time, and indirectly causes the problems such as loose contact.
And in order to the use that is still convenient to operation at low light source or dark place, film key switch can be established with an illuminating module group, this illuminating module roughly comprise a reflecting plate, splice to be fixed on this reflecting plate and can directing light and make the transparent light guide plate of light penetration and a light-emitting component luminous towards this light guide plate, utilize the reflection of this reflecting plate and this light guide plate to guide, the light that this light-emitting component is produced can be uniformly distributed along this light guide plate bearing of trend.This film key switches set is located on this transparent light guide plate; This film key switch, because light-transmitting materials, for making light must scatter to necessary printing opacity position, therefore need be laid shielding layer (painting black or the lighttight ink of essence), its light is not appeared in alternatively non-transparent region.
But be located at this light guide plate side due to this light-emitting component, and will be more weak away from the light of this this light guide plate of light-emitting component side, and known stacked in layers structural entity thickness is thicker, and processing procedure is complicated.And optical channel utilizes transparent membrane key switch (PET material) plate and light guide plate (optical grade PC material) to produce, light-emitting component is laid in light guide plate side; Because the circuit being attached to film key switch adopts silver slurry celluloid ink, and silver is starched have extinction effect in optics, therefore light is when film key switch and light guide plate form light channel, just light can be made because of silver slurry extinction to produce the facts of light decay and session change, therefore luminous benefit will be affected.
Summary of the invention
For solving the above problems, the object of the present invention is to provide a kind of structure of backlight module, its knot is simple, and conducting effect is good, helps the slimming of backlight module, and can simplify processing procedure, reduces costs.
For achieving the above object, the invention discloses a kind of structure of backlight module, it is characterized in that comprising:
At least one light guide plate, respectively this light guide plate is provided with several LED accommodation space;
One lighttight white reflection sheet, this white reflection sheet is laid with several electrical behavior switch circuit, coated respectively this light guide plate of this white reflection sheet turnover;
At least one luminescence unit, this luminescence unit is laid in respectively under this light guide plate, and respectively this luminescence unit comprises an illuminating circuit and number LED, respectively this LED is placed in respectively in this LED accommodation space, make in light source incidence to each this light guide plate, incident light source recycles this white reflection sheet and turn down the light source conduction pathway transmission light formed.
Wherein, under this luminescence unit is laid in coated respectively this light guide plate of this white reflection sheet turnover.
Wherein, under this luminescence unit is laid in this white reflection sheet after turnover, respectively this LED is placed in respectively in this LED accommodation space through after several open-works of this white reflection sheet.
Wherein, this luminescence unit is directly embedded on inside this white reflection sheet after turnover, and lay this illuminating circuit of respectively this LED institute palpus at this white reflection sheet, respectively this LED is placed in respectively in this LED accommodation space.
Wherein, number elastomer is laid on respectively this electrical behavior switch circuit of this white reflection sheet, and respectively this electrical behavior switch circuit comprises cathode circuit and cathode traces, utilizes each elastomer of pressing, makes respectively this electrical behavior switch circuit conducting.
Wherein, respectively this elastomer is to the position of respectively this electrical behavior switch circuit of white reflection sheet laying a conductive material, makes this conductive material contact respectively this electrical behavior switch circuit form conducting or short circuit through pressing.
Wherein, more comprise a protective layer and be arranged on respectively this electrical behavior switch circuit of this white reflection sheet, protection respectively this electrical behavior switch circuit.
Wherein, this white reflection sheet adopt UV type or solvent-borne type silver slurry to lay respectively this electrical behavior switch circuit.
Wherein, this white reflection sheet is in being provided with number perforation for the region of printing opacity, the position of respectively corresponding respectively this perforation of this light guide plate and be laid with several reflector space in each this light guide plate lower surface, respectively this light guide plate is polycarbonate resin material.
Wherein, respectively this reflector space is provided with several micro-structural or white high reverse--bias diffusion ink.Effect of contrast prior art:
1. the present invention will respectively be combined with this white reflection sheet by this electrical behavior switch circuit, directly circuit distribution will be located on this white reflection sheet, can reduce the integral thickness of known electrical behavior switch circuit.
2. the structure of coated respectively this light guide plate of this white reflection sheet turnover need not independently add shielding layer in addition in alternatively non-transparent region, this white reflection sheet lighttight can be directly utilized in position to offer respectively this perforation, also processing procedure and the material of shielding layer can be saved, and respectively this LED is placed in respectively in this LED accommodation space, the light source conduction pathway that light source also can utilize this white reflection sheet to turn down and be formed transmits light, contribute to the slimming of backlight module, and can processing procedure be simplified.
3. and the electrical behavior switch circuit of known flexible circuit board (membrane) correspond to system slot contacting points position, can because upper and lower (the up or down) of contacting points position be different, and the contacting points position of flexible circuit board and system slot must be adjusted, the present invention is because utilize this white reflection sheet to turn down the structure formed, so only need lay the circuit of corresponding system slot at this white reflection sheet, and contact position need not be adjusted again in addition, flexible circuit board processing procedure can be simplified.
4. the problems such as the electrical behavior switch circuit shrink utilizing UV type or solvent-borne type silver slurry that known baking-type conductive silver paste can be avoided to produce and loose contact.Because of UV type silver slurry be placed in uviol lamp under irradiate tens of second can be dry, and solvent-borne type silver slurry gluing time is short, therefore can the speed of production of expedite product, output is increased, increase industry applications.
Accompanying drawing explanation
Fig. 1: the perspective exploded view of first embodiment of the invention.
Fig. 2: the generalized section of first embodiment of the invention.
Enlarged schematic partial view in Fig. 2 A: Fig. 2.
Fig. 3: the generalized section of second embodiment of the invention.
Fig. 4: the generalized section of third embodiment of the invention.
Embodiment
First, as shown in Figures 1 to 4, preferred embodiment of the present invention, only these embodiments are only for explanation, restriction not by this structure in patent application.
As Fig. 1,2,2A is depicted as the first embodiment of the present invention, the structure of this backlight module described, comprising:
At least one light guide plate 10, respectively this light guide plate 10 is polycarbonate resin (Polycarbonate, PC) material, and respectively this light guide plate 10 is provided with several LED accommodation space 12;
One lighttight white reflection sheet 20, this white reflection sheet 20 is laid with several electrical behavior switch circuit 21, and respectively this electrical behavior switch circuit 21 comprises cathode circuit 211 and cathode traces 212, and this white reflection sheet 20 turns down coated respectively this light guide plate 10;
One protective layer 23(is as shown in Fig. 2,2A) be arranged on respectively this electrical behavior switch circuit 21 of this white reflection sheet 20, respectively this electrical behavior switch circuit 21 can be protected;
Number elastomer 30 is laid on respectively this electrical behavior switch circuit 21 of this white reflection sheet 20, and each elastomer 30 of pressing can be utilized to make respectively this electrical behavior switch circuit 21 circuit turn-on;
At least one luminescence unit 40 is laid in this white reflection sheet 20 and turns down coated respectively this light guide plate 10 times, and respectively this luminescence unit 40 comprises an illuminating circuit 41 and number LED42, respectively this LED42 is placed in respectively in this LED accommodation space 12, make in light source incidence to each this light guide plate 10, incident light source recycles this white reflection sheet 20 and turn down the light source conduction pathway transmission light formed;
Wherein, this white reflection sheet 20 adopt UV type or solvent-borne type silver slurry to lay respectively this electrical behavior switch circuit 21; Irradiating tens of second under UV type silver slurry is placed in uviol lamp can be dry; The general substrate of solvent-borne type silver slurry is rubber or acryl, when dispatching from the factory by solvent wherein; Substantially initial by moisture or hot next initial, namely occur gluing together phenomenon as long as run into air, but speed is slow, temperature arrives 70 ~ 80 DEG C, within about 0.5 hour, is glue-bondable completing.Because the time of baking is short and temperature that is baking is low, so electrical behavior switch circuit can not be caused to shrink.
Wherein, this white reflection sheet 20 is provided with several perforation 22 in the region for printing opacity, and light scattering can be made to go out respectively this perforation 22;
Wherein, respectively this light guide plate 10 correspondence respectively this perforation 22 position and be laid with several reflector space 11 in each this light guide plate 10 lower surface, light conduction direction is changed, is projected to the position of respectively this perforation 22.
Wherein respectively this reflector space 11 can be provided with several micro-structural.
Wherein respectively this reflector space 11 can utilize white high reverse--bias diffusion ink to be formed.
Wherein, respectively this elastomer 30 is to the position of respectively this electrical behavior switch circuit 21 of white reflection sheet 20 laying a conductive material 31, makes this conductive material 31 contact respectively this electrical behavior switch circuit 21 form conducting or short circuit through pressing.
Be illustrated in figure 3 the second embodiment of the present invention, this luminescence unit 40 is laid in this white reflection sheet after turnover 20 times, and respectively this LED42 is through being placed in respectively in this LED accommodation space 12 after several open-works 24 of this white reflection sheet 20;
Be illustrated in figure 4 the third embodiment of the present invention, this luminescence unit 40 also can directly be embedded on inside this white reflection sheet 20 after turnover, this white reflection sheet 20 lay each this LED42 must this illuminating circuit 41, respectively this LED42 is placed in respectively in this LED accommodation space 12;
By above structure, the present invention has following advantage:
1. respectively will be combined with this white reflection sheet 20 by this electrical behavior switch circuit 21, and this electrical behavior switch will directly be laid on this white reflection sheet 20, the integral thickness of known electrical behavior switch circuit can be reduced.
2. the structure that this white reflection sheet 20 turns down coated respectively this light guide plate 10 need not independently add shielding layer in addition in alternatively non-transparent region, this white reflection sheet 20 lighttight can be directly utilized in position to offer respectively this perforation 22, also processing procedure and the material of shielding layer can be saved, and respectively this LED42 is placed in respectively in this LED accommodation space 12, the light source conduction pathway that light source also can utilize this white reflection sheet 20 to turn down and be formed transmits light, contribute to the slimming of backlight module, and can processing procedure be simplified.
3. and the electrical behavior switch circuit of known flexible circuit board (membrane) correspond to system slot contacting points position, meeting because upper and lower (the up or down) of contacting points position is different, and must adjust the contacting points position of flexible circuit board and system slot; The present invention, because utilize this white reflection sheet 20 to turn down the structure formed, so only need lay the circuit of corresponding system slot at this white reflection sheet 20, and need not adjust contact position more in addition, can simplify flexible circuit board processing procedure.
4. the problems such as the electrical behavior switch circuit shrink utilizing UV type or solvent-borne type silver slurry that known baking-type conductive silver paste can be avoided to produce and loose contact.Because of UV type silver slurry be placed in uviol lamp under irradiate tens of second can be dry, and solvent-borne type silver slurry gluing time is short, therefore can the speed of production of expedite product, output is increased, increase industry applications.
Claims (10)
1. a structure for backlight module, is characterized in that comprising:
At least one light guide plate, respectively this light guide plate is provided with several LED accommodation space;
One lighttight white reflection sheet, this white reflection sheet is laid with several electrical behavior switch circuit, coated respectively this light guide plate of this white reflection sheet turnover;
At least one luminescence unit, this luminescence unit is laid in respectively under this light guide plate, and respectively this luminescence unit comprises an illuminating circuit and number LED, respectively this LED is placed in respectively in this LED accommodation space, make in light source incidence to each this light guide plate, incident light source recycles this white reflection sheet and turn down the light source conduction pathway transmission light formed.
2. the structure of backlight module as claimed in claim 1, is characterized in that, under this luminescence unit is laid in coated respectively this light guide plate of this white reflection sheet turnover.
3. the structure of backlight module as claimed in claim 1, is characterized in that, under this luminescence unit is laid in this white reflection sheet after turnover, respectively this LED is through being placed in after several open-works of this white reflection sheet respectively in this LED accommodation space.
4. the structure of backlight module as claimed in claim 1, it is characterized in that, this luminescence unit is directly embedded on inside this white reflection sheet after turnover, and lay this illuminating circuit of respectively this LED institute palpus at this white reflection sheet, respectively this LED is placed in respectively in this LED accommodation space.
5. the structure of the backlight module as described in any one of Claims 1 to 4, it is characterized in that, number elastomer is laid on respectively this electrical behavior switch circuit of this white reflection sheet, respectively this electrical behavior switch circuit comprises cathode circuit and cathode traces, utilize each elastomer of pressing, make respectively this electrical behavior switch circuit conducting.
6. the structure of backlight module as claimed in claim 5, it is characterized in that, respectively this elastomer is to the position of respectively this electrical behavior switch circuit of white reflection sheet laying a conductive material, makes this conductive material contact respectively this electrical behavior switch circuit form conducting or short circuit through pressing.
7. the structure of backlight module as claimed in claim 1, is characterized in that, more comprise a protective layer and be arranged on respectively this electrical behavior switch circuit of this white reflection sheet, protection respectively this electrical behavior switch circuit.
8. the structure of backlight module as claimed in claim 1, is characterized in that, this white reflection sheet adopts UV type or solvent-borne type silver slurry lay respectively this electrical behavior switch circuit.
9. the structure of backlight module as claimed in claim 1, it is characterized in that, this white reflection sheet is in being provided with number perforation for the region of printing opacity, the position of respectively corresponding respectively this perforation of this light guide plate and be laid with several reflector space in each this light guide plate lower surface, respectively this light guide plate is polycarbonate resin material.
10. the structure of backlight module as claimed in claim 9, it is characterized in that, respectively this reflector space is provided with several micro-structural or white high reverse--bias diffusion ink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410018841.5A CN104795268A (en) | 2014-01-16 | 2014-01-16 | Structure for backlight modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410018841.5A CN104795268A (en) | 2014-01-16 | 2014-01-16 | Structure for backlight modules |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104795268A true CN104795268A (en) | 2015-07-22 |
Family
ID=53560009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410018841.5A Pending CN104795268A (en) | 2014-01-16 | 2014-01-16 | Structure for backlight modules |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104795268A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109243896A (en) * | 2017-07-10 | 2019-01-18 | 致伸科技股份有限公司 | Illuminated keyboard |
| CN111653447A (en) * | 2019-06-18 | 2020-09-11 | 光宝电子(广州)有限公司 | Circuit structure, backlight module using same and light-emitting key device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201508525U (en) * | 2009-06-29 | 2010-06-16 | 常熟精元电脑有限公司 | Luminous keyboard |
| US20100288615A1 (en) * | 2009-05-18 | 2010-11-18 | Alps Electric Co., Ltd | Keyboard device |
| CN201655620U (en) * | 2010-04-26 | 2010-11-24 | 精元电脑股份有限公司 | Film light guide keyboard device |
| TWM412377U (en) * | 2011-03-31 | 2011-09-21 | Global Lighting Technologies | Backlight module |
-
2014
- 2014-01-16 CN CN201410018841.5A patent/CN104795268A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100288615A1 (en) * | 2009-05-18 | 2010-11-18 | Alps Electric Co., Ltd | Keyboard device |
| CN201508525U (en) * | 2009-06-29 | 2010-06-16 | 常熟精元电脑有限公司 | Luminous keyboard |
| CN201655620U (en) * | 2010-04-26 | 2010-11-24 | 精元电脑股份有限公司 | Film light guide keyboard device |
| TWM412377U (en) * | 2011-03-31 | 2011-09-21 | Global Lighting Technologies | Backlight module |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109243896A (en) * | 2017-07-10 | 2019-01-18 | 致伸科技股份有限公司 | Illuminated keyboard |
| CN109243896B (en) * | 2017-07-10 | 2020-03-06 | 致伸科技股份有限公司 | Luminous keyboard |
| CN111653447A (en) * | 2019-06-18 | 2020-09-11 | 光宝电子(广州)有限公司 | Circuit structure, backlight module using same and light-emitting key device |
| CN111653447B (en) * | 2019-06-18 | 2023-02-17 | 光宝电子(广州)有限公司 | Circuit structure, backlight module using same and light-emitting key device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9442238B2 (en) | Backlight module | |
| CN101739162B (en) | Control panel and manufacture method thereof | |
| CN103887104A (en) | Backlight device and light-emitting keyboard comprising same | |
| TWM528464U (en) | Lighting input device | |
| KR102315159B1 (en) | Light diffusion with light-generating sources | |
| CN103672741A (en) | Light guide module and electronic device | |
| TW201835654A (en) | Front light plate and front light module thereof | |
| CN202307644U (en) | Keyboard apparatus having backlight module | |
| CN104933972A (en) | Ultrathin interactive logo for household electrical appliance and manufacturing method for same | |
| TW202113892A (en) | Keyboard backlight module and manufacturing method thereof | |
| CN104795268A (en) | Structure for backlight modules | |
| JP2013232392A (en) | Luminous keying module of portable device | |
| CN107196634A (en) | Contact panel assembly and portable electronic devices | |
| US20130100637A1 (en) | Press-key panel | |
| CN204884969U (en) | Luminous formula keyboard device | |
| CN108780496A (en) | Sensing device and terminal device | |
| CN202067706U (en) | Luminous keyboard | |
| CN204479885U (en) | Side light type intelligent substrate display device | |
| CN102254725A (en) | Light-emitting keyboard | |
| CN106484164B (en) | touch panel | |
| CN102314203A (en) | Enclosure construction and combined structure of enclosure construction and input device | |
| KR101042919B1 (en) | Keypad assembly for mobile communication | |
| TW201419343A (en) | Structure of backlight module | |
| CN206920641U (en) | Preceding tabula rasa | |
| CN107949147A (en) | A kind of flexible PCB and touch control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150722 |
|
| WD01 | Invention patent application deemed withdrawn after publication |