CN103018817A - Light guide plate structure and method for manufacturing light guide plate - Google Patents
Light guide plate structure and method for manufacturing light guide plate Download PDFInfo
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- CN103018817A CN103018817A CN2012104794665A CN201210479466A CN103018817A CN 103018817 A CN103018817 A CN 103018817A CN 2012104794665 A CN2012104794665 A CN 2012104794665A CN 201210479466 A CN201210479466 A CN 201210479466A CN 103018817 A CN103018817 A CN 103018817A
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- guide plate
- light guide
- medium layer
- light
- refractive index
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Abstract
The invention provides a light guide plate structure and a method for manufacturing the light guide plate. The light guide plate structure comprises a light guide plate, a first dielectric layer, an optical microstructure, a second dielectric layer and a reflecting layer, wherein the light guide plate has an emergent surface and a bottom surface; the emergent surface is opposite to the bottom surface; the first dielectric layer is formed on the emergent surface; the optical microstructure is formed on the bottom surface and is used for allowing light rays in the light guide plate to exit from the emergent surface; the second dielectric layer is formed on the optical microstructure; the refractive index of the first dielectric layer and the second dielectric layer is smaller than the refractive index of the light guide plate and is larger than the refractive index of air; and the reflecting layer is formed on the second dielectric layer and is used for reflecting the light rays in the light guide plate to exit from the emergent surface.
Description
Technical field
The present invention is about a kind of light conducting plate structure and method for manufacturing light guide plate, and the refractive index of espespecially a kind of exiting surface that is formed at respectively light guide plate and the dielectric layer on the bottom surface is between refractive index and the light conducting plate structure between the air refraction and the method for manufacturing light guide plate of light guide plate.
Background technology
See also Fig. 1, it is the cut-away section synoptic diagram of the keyboard 1 of prior art.As shown in Figure 1, keyboard 1 comprises base plate 10, a plurality of button 12 and backlight module 14.Each button 12 is arranged on the base plate 10, presses for the user, and then carries out the function of user institute wish input.Backlight module 14 is arranged at base plate 10 times, to provide keyboard 1 luminous light source.Backlight module 14 comprises shadow shield 140, light guide plate 142, sheet metal 144, reflector plate 146 and luminescence unit 148.Shadow shield 140 is arranged at base plate 10 times, and light guide plate 142 is arranged at shadow shield 140 times, and sheet metal 144 is arranged at light guide plate 142 times, and 146 of reflector plates are to be arranged on the sheet metal 144 and to be positioned at light guide plate 142 times.Luminescence unit 148 is arranged at a side of light guide plate 142, so that the light of luminescence unit 148 emission can utilize in the interior design that total reflections can occur and can be reflected sheet 146 reflections of light guide plate 142 to penetrate equably from light guide plate 142, and then project outside the button 12 by shadow shield 140 towards the direction of base plate 10, use producing the luminous effect of keyboard 1.
In above-mentioned design; the refractive index that the total reflection phenomenon of light utilizes light guide plate 142 produces greater than the design of the refractive index (can be considered 1) of the air in the crack between shadow shield 140 and light guide plate 142; yet; because the surface of light guide plate 142 is not subject to suitable protection; therefore; in the process that light guide plate 142 is assembled in the keyboard 1; the surface that tends to occur light guide plate 142 is subject to foreign matter (such as grease; dust is dirty etc.) adhere to or the situation such as scuffing; so will cause light total reflection in the light guide plate 142 destroyed and light leak occurs or light transmits the phenomenons such as distance is long, thereby have influence on light service efficiency and the Luminescence Uniformity of light guide plate 142.In addition, as shown in Figure 1, backlight module 14 is to adopt light guide plate 142 to be arranged at the effect that the design between shadow shield 140 and the reflector plate 146 is evenly penetrated from the position of corresponding button 12 with performance guiding light, but the configuration of light guide plate 142, shadow shield 140 and reflector plate 146 can occupy too much keyboard space, so be unfavorable for the slimming design of keyboard 1.
Summary of the invention
The object of the present invention is to provide the refractive index of a kind of exiting surface that is formed at respectively light guide plate and the dielectric layer on the bottom surface between refractive index and the light conducting plate structure between the air refraction and the method for manufacturing light guide plate thereof of light guide plate, to solve above-mentioned problem.
For achieving the above object, the first technical scheme of the present invention provides a kind of light conducting plate structure, comprises: light guide plate, and it has exiting surface and bottom surface, and this exiting surface and this bottom surface are toward each other; The first medium layer, it is formed on this exiting surface; Optical microstructures, it is formed on this bottom surface, is used for making the light in this light guide plate to penetrate from this exiting surface; The second medium layer, it is formed on this optical microstructures, and the refractive index of this first medium layer and this second medium layer is less than the refractive index of this light guide plate and greater than the refractive index of air; And the reflection horizon, it is formed on this second medium layer, and the light that is used for reflecting in this light guide plate penetrates from this exiting surface.
Preferably, this light guide plate is comprised of the polycarbonate material, and this first medium layer and this second medium layer are comprised of the silicon dioxide material.
Preferably, this first medium layer and this second medium layer are that mode with surface-coated or co-extrusion modling is formed at respectively on this exiting surface and this optical microstructures.
Preferably, this reflection horizon with spray paint, the mode of printing, gold stamping, sputter or physical vapor evaporation is formed on this second medium layer.
Preferably, this optical microstructures is with hot pressing, ink printing, or the mode of ultraviolet curing is formed on this bottom surface.
The second technical scheme of the present invention provides a kind of method for manufacturing light guide plate, comprises following steps: light guide plate is provided, and it has exiting surface and bottom surface; Form optical microstructures on this bottom surface; Mode with surface-coated or co-extrusion modling is formed at first medium layer and second medium layer on this exiting surface and this optical microstructures respectively, and wherein the refractive index of this first medium layer and this second medium layer is less than the refractive index of this light guide plate and greater than the refractive index of air; And form the reflection horizon on this second medium layer.
Preferably, this light guide plate is comprised of the polycarbonate material, and this first medium layer and this second medium layer are comprised of the silicon dioxide material.
Preferably, this first medium layer and this second medium layer are that mode with surface-coated or co-extrusion modling is formed at respectively on this exiting surface and this optical microstructures.
Preferably, this reflection horizon be spray paint, the mode of printing, gold stamping, sputter or physical vapor evaporation is formed on this second medium layer.
Preferably, this optical microstructures is with hot pressing, ink printing, or the mode of ultraviolet curing is formed on this bottom surface.
Compare with prior art, utilization of the present invention be formed at respectively on the exiting surface of light guide plate and the bottom surface the refractive index of dielectric layer between the refractive index of light guide plate and the design between the air refraction, so that light can positively produce total reflection phenomenon in light guide plate, thus increase light in light guide plate light transmission distance and promote the light ray energy transmission effect.In addition, utilize optical microstructures and reflection horizon directly to be formed at being configured on the light guide plate and replace and mentionedly in the prior art in light guide plate the configuration of shadow shield and reflector plate is set respectively up and down, the integral thickness of light conducting plate structure provided by the present invention can effectively reduce and is beneficial to follow-up keyboard slimming design.In addition; see through that the first medium layer designs with second medium layer and the reflection horizon institute common interlayer that forms protection and the second medium layer is formed at the isolation design in light guide plate and reflection horizon; the present invention also can prevent from occurring light guide plate effectively in the process that light conducting plate structure is being assembled in the keyboard surface is subject to that foreign matter (such as grease, dust dirty etc.) adheres to or the situation such as scuffing; and avoid the light in the light guide plate directly to be reflected layer absorption, thereby promote further light service efficiency and the Luminescence Uniformity of light conducting plate structure.
Description of drawings
Fig. 1 is the cut-away section synoptic diagram of the keyboard of prior art.
Fig. 2 is arranged at cut-away section synoptic diagram in the keyboard for the light conducting plate structure that proposes according to the embodiment of the invention.
Fig. 3 is the part enlarged diagram of the light conducting plate structure of Fig. 2.
Fig. 4 is for using method for manufacturing light guide plate of the present invention to form the process flow diagram of light conducting plate structure shown in Figure 3.
Embodiment
For making purpose of the present invention, structure, feature and function thereof there are further understanding, hereby cooperate embodiment to be described in detail as follows.
See also Fig. 2, it is arranged at cut-away section synoptic diagram in the keyboard 102 for the light conducting plate structure 100 that proposes according to embodiments of the invention, and as shown in Figure 2, light conducting plate structure 100 is applied on the luminescent designs of keyboard 102, is not limited but do not use with this.In this embodiment, light conducting plate structure 100 is arranged on the position of a plurality of buttons 104 of keyboard 102 interior correspondences, and the luminescence unit 106 in the keyboard 102 is (such as light-emittingdiode (Light Emitting Diode, LED) etc.) then be a side that is arranged at light conducting plate structure 100, use so that the light that luminescence unit 106 is launched can project via the direction of light conducting plate structure 100 towards button 104, thereby performance keyboard 102 has the effect of lighting function.
Be described in detail in this structural design for light conducting plate structure 100, see also Fig. 3 and Fig. 4, Fig. 3 is the part enlarged diagram of the light conducting plate structure 100 of Fig. 2, and Fig. 4 is for using method for manufacturing light guide plate of the present invention with the process flow diagram of the light conducting plate structure 100 of formation Fig. 3.As shown in Figure 3, light conducting plate structure 100 comprises light guide plate 108, first medium layer 110, optical microstructures 112, second medium layer 114, and reflection horizon 116, wherein optical microstructures 112 only shows it with the concaveconvex structure letter in Fig. 3, but not limit by this, it also can adopt the design of other common optical microstructures, such as the printing ink design layer etc.Light guide plate 108 has exiting surface 118 and bottom surface 120, and exiting surface 118 and bottom surface 120 are toward each other.As shown in Figure 4, method for manufacturing light guide plate of the present invention comprises the following step:
Step 400: light guide plate 108 is provided;
Step 402: form optical microstructures 112 on bottom surface 120;
Step 404: the mode with surface-coated or co-extrusion modling (Co-extrusion) is formed at first medium layer 110 and second medium layer 114 on exiting surface 118 and the optical microstructures 112 respectively;
Step 406: form reflection horizon 116 on second medium layer 114.
By above-mentioned steps as can be known, first medium layer 110 is to be formed on the exiting surface 118, optical microstructures 112 is that the light that are formed on the bottom surface 120 to be used in scattering or the diffusion light guide plate 108 penetrate from exiting surface 118, second medium layer 114 is formed on the optical microstructures 112, reflection horizon 116 is formed on the second medium layer 114, the light that is used for reflecting in the light guide plate 108 penetrates from exiting surface 118, in this embodiment, first medium layer 110 and second medium layer 114 preferably are formed at respectively on exiting surface 118 and the optical microstructures 112 in the mode of surface-coated or co-extrusion modling, reflection horizon 116 is preferably to spray paint, printing, gold stamping, sputter or physical vapor evaporation (Physical Vapor Deposition, PVD) mode is formed on the second medium layer 114, optical microstructures 112 then is preferably with hot pressing, ink printing, or the mode of ultraviolet curing is formed on the bottom surface 120, but not limit by this, in other words, so long as can be used to first medium layer 110, optical microstructures 112, second medium layer 114 and reflection horizon 116 are formed at the molding manufacture procedure on the light guide plate 108, and it all can be the present invention and adopts it.As for the related description of the molding manufacture procedure in above-mentioned first medium layer 110, optical microstructures 112, second medium layer 114 and reflection horizon 116, it is for being common in the prior art, so repeat no more in this.
In more detail, the refractive index system that the present invention adopts first medium layer 110 and second medium layer 114 is less than the refractive index of light guide plate 108 and greater than the design of the refractive index of air, use positively reach light can be in the purpose of light guide plate 108 interior generation total reflections.For instance, in this embodiment, light guide plate 108 can be by polycarbonate (Polycarbonate, PC) material forms, its material refractive index approximates 1.5, and first medium layer 110 and second medium layer 114 can be comprised of the silicon dioxide material, and its material refractive index approximates 1.2.Should be noted that light guide plate 108 can be not limited to above-described embodiment with the selecting of composition material of first medium layer 110 and second medium layer 114, it can change to some extent according to the practical application request of light conducting plate structure 100.
See through above-mentioned configuration, after in light is incident to light guide plate 108, light can be advanced in light guide plate 108, and when being incident to the bottom surface 120 of light guide plate 108, project outside the keyboard 102 via exiting surface 118 from the position of the button 104 of corresponding keyboard 102 by the optical scattering of the design of the optical reflection in reflection horizon 116 and optical microstructures 112 or diffusion design, thereby so that keyboard 102 is luminous.In said process, owing to be formed with respectively its refractive index on the exiting surface 118 of light guide plate 108 and the bottom surface 120 greater than air refraction and less than first medium layer 110 and the second medium layer 114 of the refractive index of light guide plate 108, therefore, the light that luminescence unit 106 sends can be positively at light guide plate 108 interior generation total reflection phenomenons, use increase the light transmission of light light guide plate 108 in apart from and promote the light ray energy transmission effect.
In addition, project design aspect outside the keyboard at guiding light from the position of the button of corresponding keyboard via the exiting surface of light guide plate, the present invention utilizes optical microstructures 112 and reflection horizon 116 directly to be formed at being configured on the light guide plate 108 to replace and mentionedly in the prior art in light guide plate the configuration of shadow shield and reflector plate is set respectively up and down, use producing identical light guiding effect.Thus, see through to omit the design of shadow shield and reflector plate, the integral thickness of light conducting plate structure 100 can effectively reduce and is beneficial to follow-up keyboard slimming design.
In addition; see through the isolation design that 116 the common interlayers protection designs that form in first medium layer 110 and second medium layer 114 and reflection horizon and second medium layer 114 are formed at light guide plate 108 and reflection horizon 116; the present invention also can prevent effectively that the surface that occurs light guide plate 108 in the process that light conducting plate structure 100 is being assembled in the keyboard 102 is subject to foreign matter (such as grease; dust is dirty etc.) adhere to or the situation such as scuffing; and avoid the light in the light guide plate 108 directly to be reflected layer 116 absorption, thereby promote further light service efficiency and the Luminescence Uniformity of light conducting plate structure 100.
Utilization of the present invention be formed at respectively on the exiting surface of light guide plate and the bottom surface the refractive index of dielectric layer between the refractive index of light guide plate and the design between the air refraction, so that light can positively produce total reflection phenomenon in light guide plate, thus increase light in light guide plate light transmission distance and promote the light ray energy transmission effect.In addition, utilize optical microstructures and reflection horizon directly to be formed at being configured on the light guide plate and replace and mentionedly in the prior art in light guide plate the configuration of shadow shield and reflector plate is set respectively up and down, the integral thickness of light conducting plate structure provided by the present invention can effectively reduce and is beneficial to follow-up keyboard slimming design.In addition; see through that the first medium layer designs with second medium layer and the reflection horizon institute common interlayer that forms protection and the second medium layer is formed at the isolation design in light guide plate and reflection horizon; the present invention also can prevent from occurring light guide plate effectively in the process that light conducting plate structure is being assembled in the keyboard surface is subject to that foreign matter (such as grease, dust dirty etc.) adheres to or the situation such as scuffing; and avoid the light in the light guide plate directly to be reflected layer absorption, thereby promote further light service efficiency and the Luminescence Uniformity of light conducting plate structure.
The present invention is described by above-mentioned related embodiment, yet above-described embodiment is only for implementing example of the present invention.Must be pointed out that the embodiment that has disclosed does not limit the scope of the invention.On the contrary, the change of doing without departing from the spirit and scope of the present invention and retouching all belong to scope of patent protection of the present invention.
Claims (10)
1. a light conducting plate structure is characterized in that, comprises:
Light guide plate, it has exiting surface and bottom surface, and this exiting surface and this bottom surface are toward each other;
The first medium layer, it is formed on this exiting surface;
Optical microstructures, it is formed on this bottom surface, is used for making the light in this light guide plate to penetrate from this exiting surface;
The second medium layer, it is formed on this optical microstructures, and the refractive index of this first medium layer and this second medium layer is less than the refractive index of this light guide plate and greater than the refractive index of air; And
The reflection horizon, it is formed on this second medium layer, and the light that is used for reflecting in this light guide plate penetrates from this exiting surface.
2. light conducting plate structure as claimed in claim 1 is characterized in that, this light guide plate is comprised of the polycarbonate material, and this first medium layer and this second medium layer are comprised of the silicon dioxide material.
3. light conducting plate structure as claimed in claim 1 is characterized in that, this first medium layer and this second medium layer are that the mode with surface-coated or co-extrusion modling is formed at respectively on this exiting surface and this optical microstructures.
4. light conducting plate structure as claimed in claim 1 is characterized in that, this reflection horizon with spray paint, the mode of printing, gold stamping, sputter or physical vapor evaporation is formed on this second medium layer.
5. light conducting plate structure as claimed in claim 1 is characterized in that, this optical microstructures is with hot pressing, ink printing, or the mode of ultraviolet curing is formed on this bottom surface.
6. a method for manufacturing light guide plate is characterized in that, comprises following steps:
Light guide plate is provided, and it has exiting surface and bottom surface;
Form optical microstructures on this bottom surface;
Mode with surface-coated or co-extrusion modling is formed at first medium layer and second medium layer on this exiting surface and this optical microstructures respectively, and wherein the refractive index of this first medium layer and this second medium layer is less than the refractive index of this light guide plate and greater than the refractive index of air; And
Form the reflection horizon on this second medium layer.
7. method for manufacturing light guide plate as claimed in claim 6 is characterized in that, this light guide plate is comprised of the polycarbonate material, and this first medium layer and this second medium layer are comprised of the silicon dioxide material.
8. method for manufacturing light guide plate as claimed in claim 6 is characterized in that, this first medium layer and this second medium layer are that the mode with surface-coated or co-extrusion modling is formed at respectively on this exiting surface and this optical microstructures.
9. method for manufacturing light guide plate as claimed in claim 6 is characterized in that, this reflection horizon be spray paint, the mode of printing, gold stamping, sputter or physical vapor evaporation is formed on this second medium layer.
10. method for manufacturing light guide plate as claimed in claim 6 is characterized in that, this optical microstructures is with hot pressing, ink printing, or the mode of ultraviolet curing is formed on this bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104794665A CN103018817A (en) | 2012-11-22 | 2012-11-22 | Light guide plate structure and method for manufacturing light guide plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104794665A CN103018817A (en) | 2012-11-22 | 2012-11-22 | Light guide plate structure and method for manufacturing light guide plate |
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|---|---|
| CN103018817A true CN103018817A (en) | 2013-04-03 |
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| CN2012104794665A Pending CN103018817A (en) | 2012-11-22 | 2012-11-22 | Light guide plate structure and method for manufacturing light guide plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI492258B (en) * | 2013-05-10 | 2015-07-11 | Darfon Electronics Corp | Backlit keyboard and light guide module and manufacture method thereof |
| WO2022222540A1 (en) * | 2021-04-21 | 2022-10-27 | 惠科股份有限公司 | Backlight module of display panel, and display device |
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| JPH05232467A (en) * | 1992-02-18 | 1993-09-10 | Sekisui Chem Co Ltd | Face light source device |
| JPH1020125A (en) * | 1996-06-28 | 1998-01-23 | Nitto Denko Corp | Surface light source device and liquid crystal display device |
| JP2001307525A (en) * | 2000-04-21 | 2001-11-02 | Matsushita Electric Ind Co Ltd | Surface emiting apparatus |
| JP2011070865A (en) * | 2009-09-25 | 2011-04-07 | Shin Etsu Polymer Co Ltd | Light guide body |
| CN102156320A (en) * | 2011-02-25 | 2011-08-17 | 深圳市华星光电技术有限公司 | Side-entrance type light guide plate assembly and backlight module |
| CN102155677A (en) * | 2010-01-13 | 2011-08-17 | 欧姆龙株式会社 | Area light source device and liquid crystal display device |
| CN202024250U (en) * | 2011-04-03 | 2011-11-02 | 苏州达方电子有限公司 | Light guide module |
| CN102540320A (en) * | 2012-01-19 | 2012-07-04 | 友达光电股份有限公司 | Light guiding plate and manufacturing method thereof |
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2012
- 2012-11-22 CN CN2012104794665A patent/CN103018817A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05232467A (en) * | 1992-02-18 | 1993-09-10 | Sekisui Chem Co Ltd | Face light source device |
| JPH1020125A (en) * | 1996-06-28 | 1998-01-23 | Nitto Denko Corp | Surface light source device and liquid crystal display device |
| JP2001307525A (en) * | 2000-04-21 | 2001-11-02 | Matsushita Electric Ind Co Ltd | Surface emiting apparatus |
| JP2011070865A (en) * | 2009-09-25 | 2011-04-07 | Shin Etsu Polymer Co Ltd | Light guide body |
| CN102155677A (en) * | 2010-01-13 | 2011-08-17 | 欧姆龙株式会社 | Area light source device and liquid crystal display device |
| CN102156320A (en) * | 2011-02-25 | 2011-08-17 | 深圳市华星光电技术有限公司 | Side-entrance type light guide plate assembly and backlight module |
| CN202024250U (en) * | 2011-04-03 | 2011-11-02 | 苏州达方电子有限公司 | Light guide module |
| CN102540320A (en) * | 2012-01-19 | 2012-07-04 | 友达光电股份有限公司 | Light guiding plate and manufacturing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI492258B (en) * | 2013-05-10 | 2015-07-11 | Darfon Electronics Corp | Backlit keyboard and light guide module and manufacture method thereof |
| US9383504B2 (en) | 2013-05-10 | 2016-07-05 | Darfon Electronics (Suzhou) Co., Ltd. | Backlit keyboard and light guide module and manufacture method thereof |
| WO2022222540A1 (en) * | 2021-04-21 | 2022-10-27 | 惠科股份有限公司 | Backlight module of display panel, and display device |
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Application publication date: 20130403 |