CN101464586A - Display equipment with front optical module - Google Patents
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- CN101464586A CN101464586A CNA2007101600281A CN200710160028A CN101464586A CN 101464586 A CN101464586 A CN 101464586A CN A2007101600281 A CNA2007101600281 A CN A2007101600281A CN 200710160028 A CN200710160028 A CN 200710160028A CN 101464586 A CN101464586 A CN 101464586A
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Abstract
The invention relates to a display device with a front light module, which comprises a reflection type display with a display surface and the front light module. The front light module comprises a light guide substrate and a luminous part arranged on one side of the light guide substrate; the light guide substrate has a micro structure surface combined to the display surface; and the micro structure surface has a plurality of convex parts arranged at intervals and an air channel for providing a total reflection interface. The air channel formed by the front light module on the circumference of the convex parts can be reduced through combining the micro structure surface and the display surface, so that barriers for blocking an optical path are reduced, and the illumination uniformity is further increased.
Description
Technical field
The present invention relates to a kind of display device, particularly a kind of display device with front optical module.
Background technology
Reflective display utilizes the light of surrounding environment to provide light source with show image, has advantages such as low cost, low power consumption.But then can't show image in the place of night or indoor light deficiency, need front optical module to provide the light source can show image.On the other hand, in portable electronic component in compact development trend, the development flexible display should be present can be at the ultimate attainment trend of compactization development.In recent years, flexible reflective display (as products such as e-paper) market gradually grows up, but the not corresponding development of its preceding optical tech.The tradition front optical module only adopts by the mode of putting and combines application with reflected displaying device, but when soft demonstration, distance variation between tabula rasa and display before the product deflection will cause, thus image fogization, degradation phenomenon under shadow and the illumination uniformity repeatedly caused, influence image display quality.
The effect of aforementioned light guide plate can with pointolite or line source through a light-guide device and deviation light microstructure will convert flat illumination to, be widely used at present on advertising lamp box and the non-light emitting type display (as LCD etc.).Early stage light guide plate is bigger, and the light emitting structures size is about 100～500 μ m, can produce phenomenons such as image fogization and shadow repeatedly, causes the show image quality to descend.Along with the progress of light guide plate manufacturing technology, the light emitting structures size is less than 10 μ m, and the light guide plate of thickness below 0.6mm can quantize to produce, is expected to reduce the interference of front optical module to image.By the structural design of light guide plate, promote briliancy and improve image quality, can increase the practicality of front optical module.
As shown in Figure 1, be existing display device synoptic diagram with front optical module, as shown in the figure, this front optical module 1 comprises that one has the light guide plate 10 of first surface 101 and second surface 102, and an illuminating part 12 is set in a side of this light guide plate 10, wherein this first surface 101 is provided with a plurality of refraction structures, and this second surface 102 then is a plane.When the light S that is produced when illuminating part 12 enters this light guide plate 10, utilize the refraction structure of first surface 101 that light S refraction is penetrated second surface 102 to this reflected displaying device 11,11 of this reflected displaying devices with light S to front-reflection, in order to display frame.
Because the refraction structure of the first surface 101 of existing front optical module light guide plate can cause deflection of light, bad when planform design, feature size is excessive or the excessive situation that all can cause image fog of display distance, in addition, when light S transmits by this light guide plate 10, weak more away from the light S intensity of illuminating part 12 more, so cause easily away from the brightness of illuminating part 12 these sides phenomenon of deepening gradually, so it is not good enough to plant the distribution of light uniformity coefficient that front optical module provided.And because existing reflected displaying device and do not require pliability, front optical module can obtain good control with display assembling its relative position of back and the depth of parallelism, so traditional front optical module is usually to place reflected displaying device the place ahead by the mode of putting.Along with the development of flexible display, bendable reflected displaying device is near the volume production stage.Tradition is by distance change between tabula rasa before putting the formula front optical module and will causing after deflection and display, causes image fogization, degradation phenomenon under change shadow and the illumination uniformity.
United States Patent (USP) the 6th, 774, disclose a kind of display device that adopts attaching type light guide plate technology No. 964, as shown in Figure 2, this front optical module 2 comprises that one has the light guide plate 20 of first surface 201 and second surface 202, connect a reflected displaying device 21 in the second surface 202 of this light guide plate 20 with the adhesive coating 23 of low-refraction, and be provided with an illuminating part 22 in a side of this light guide plate 20.
Wherein, the structure of this light guide plate 20, the situation of successively decreasing according to this illuminating part 22 changes, by the thickness of reduction light guide plate 20, in order to the distance of increase light S transmission and the uniformity coefficient of distribution.Because this technology adopts plane laminating type manufacture method, follow Fresnel equation (Fresnel ' s equation) in the outgoing light quantity of adhesive interface, that is the outgoing light quantity is influenced by angle of incidence of light degree and material refractive index difference, easily too much in a sidelight line scattering of the close illuminating part 22 of light guide plate 20, or when deflection a large amount of light leaks, uneven phenomenon causes throwing light on.
Therefore, how to improve the display light skewness that above-mentioned front optical module produces, and improve the variety of problems of the image quality of this front optical module, real problem for demanding urgently now thinking deeply.
Summary of the invention
The shortcoming of prior art in view of the above, one object of the present invention are to provide a kind of display device with front optical module that promotes briliancy and image quality that has.
An object of the present invention is to provide a kind of uneven display device of illumination that reduces with front optical module.
For achieving the above object or other purposes, the invention provides a kind of display device with front optical module, comprising: reflected displaying device has display surface; And front optical module, comprise light guide base material and be disposed at this light guide base material one side to produce the illuminating part of light, this light guide base material have the micro-structure surface that is engaged to this display surface, with first surface with respect to this micro-structure surface, and this micro-structure surface has spaced many protuberances and air duct, so that the total reflection interface to be provided.
The height of aforementioned this protuberance can be between 1 to 50 μ m, this protuberance can be lens, lens pillar, pyramid, corner post prism, and one of them or its combination of trapezoidal column, respectively the width of this air duct is all different, can be according to arranging towards the cumulative mode of this illuminating part direction width.In addition, this micro-structure surface can adopt and starch heterozygous manufacture method technology with electricity and be engaged on the display surface of this reflected displaying device; And the protuberance of this light guide base material can adopt wherein a kind of fabrication techniques of hot pressing transcription and ultraviolet hardening resin transcription.Juncture between this display surface and light guide base material can comprise: adhesive coating is applied on the display surface of this reflected displaying device; The thickness of adjusting adhesive coating only buries for the top edge of this protuberance, to form this air duct between micro-structure surface and adhesive coating; And irradiation ultraviolet radiation makes the sclerosis of this adhesive coating and is fixed on display surface and the protuberance.
This first surface can be provided with the many anti-dazzle dimpling block structure of height between 0.1 to 10 μ m, and this anti-dazzle dimpling block structure can be lens, lens pillar, pyramid, corner post prism, and one of them of time wavelength anti-reflection structure (subwavelength antireflection strictures).
According to said structure, the present invention can comprise the adhesive coating of thickness between 0.1 to 30 μ m again, and to paste this micro-structure surface and this display surface, wherein this adhesive coating can be hot melt adhesive, and one of them of liquid ultraviolet hardening resin.
The present invention is by connecting this micro-structure surface and display surface, so that be formed at respectively this protuberance ambient air passage between this light guide base material and this reflected displaying device, transmit light with the interface that the incident ray total reflection is provided, and utilize the size of described protuberance and spacing to control amount of light, in air duct, light guided to a side in the mode of total reflection, and light is effectively evenly thrown light in reflected displaying device away from illuminating part.In addition, the anti-dazzle dimpling block structure of the first surface of this light guide base material is in order to reducing dazzle and the ghost that direct reflection caused, and the rising angle of control reflection ray to be promoting contrast and light utilization, and promotes image quality and reduce the front light-source power consumption.
Than prior art, the invention provides a kind of display device with front optical module, the design by this micro-structure surface promotes even illumination purposes to reach, and the projection by this light guide base material is to reach the purpose that improves briliancy and image quality.
Description of drawings
Fig. 1 is existing display device synoptic diagram with front optical module;
Fig. 2 is a United States Patent (USP) the 6th, 774, No. 964 the display device synoptic diagram with front optical module;
Fig. 3 is the structural representation with display device of front optical module of the present invention;
Fig. 4 A is the synoptic diagram of the front optical module of the display device with front optical module of the present invention;
Fig. 4 B is the data plot of the protuberance spacing and illuminating part (light source) distance of front optical module of the present invention;
Fig. 5 A to 5C is the manufacture method schematic flow sheet with display device of front optical module of the present invention;
Fig. 6 A to 6C is the manufacture method synoptic diagram of the protuberance of the display device with front optical module of the present invention;
Fig. 7 A to 7C is the joint manufacture method synoptic diagram with display device of front optical module of the present invention; And
Fig. 8 is the synoptic diagram of the second embodiment of the present invention.
The main element symbol description
1,2,3 front optical modules
10,20 light guide plate
101,201,301,501 first surfaces
102,202 second surfaces
11,21,4,6 reflected displaying devices
12,22,33,53 illuminating parts
23,55 adhesive coatings
30,50 light guide base material
302,502 micro-structure surfaces
303,503 protuberances
34,54 air ducts
40,60 display surfaces
7 moulds
71 ultraviolet hardening resins
80 anti-dazzle dimpling block structures
A1, A2 curve
S light
L length
The X width
Embodiment
Below by particular specific embodiment explanation embodiments of the present invention, below please conjunction with figs. explanation specific embodiments of the invention so that the those skilled in the art can understand technical characterictic of the present invention and the effect that obtains easily.
First embodiment
As shown in Figure 3, be the synoptic diagram with display device of front optical module of the present invention, as shown in the figure, a kind of display device with front optical module provided by the present invention comprises: reflected displaying device 4 and front optical module 3 with display surface 40; This front optical module 3 comprises a light guide base material 30 and is arranged at the illuminating part 33 of these light guide base material 30 1 sides, this light guide base material 30 has in order to be engaged to display surface 40 and to control the micro-structure surface 302 of light derived quantity and the first surface 301 of relative micro-structure surface 302, this micro-structure surface 302 has height between 1 to 50 μ m and spaced many protuberances 303, and the air duct 34 at total reflection interface is provided; Wherein, respectively the width of this air duct 34 is all different, according to arranging towards the cumulative mode of these illuminating part 33 direction width.
In present embodiment, the display surface 40 of this micro-structure surface 302 and this reflected displaying device 4 is starched heterozygous manufacture method technology with electricity and is laminated, but non-as limit, also can adopt other to follow technology and be engaged.
According to said structure, form air duct 34 around this protuberance 303, form a total reflection interface by this air duct 34 and micro-structure surface 302, light S near illuminating part 33 1 sides can be passed to a side away from illuminating part 33, in addition, this protuberance 303 can be wherein one or its combination of lens pillar, pyramid, trapezoidal column and hemispherical lens.
Please in the lump with reference to Fig. 4 A and Fig. 4 B, the relation of the light power of the width of this air duct 34 and this illuminating part 33 is described.As shown in the figure, respectively the width of this air duct 34 is X, the length of this light guide base material 30 is L, when light transmits in this light guide base material 30, because of penetrating light guide plate, part light provides illuminating effect, and produce the phenomenon that light intensity successively decreases at the length direction of light guide base material 30, must regulate and control the size of amount of light according to diverse location.Amount of light regulation and control principle is the amount of light minimum near illuminating part 33 positions, and along with the distance away from illuminating part 33 increases amount of light gradually, to reach even illumination.Present embodiment is fixed the physical dimension of this protuberance 303, by increasing than respectively this air duct 34 width X near illuminating part 33 positions, thereby light transmission scope is increased, also can bright dipping scope ratio dwindle, and by changing the respectively amount of light of this air duct 34 width X regulation and control unit length, in order to improve anaclasis uniformity coefficient away from illuminating part 33 1 sides.
Yet, the height of this protuberance 303 also can exert an influence to this air duct 34 width X respectively, shown in Fig. 4 B, A1 is for using the curve of higher protuberance 303, A2 is for using the curve of shorter protuberance 303, can learn in curve A 1, in the position of light guide base material 30 apart from illuminating part 33 (light source) 50mm, these air duct 34 width are 0.1mm, yet, learn by curve A 2, use shorter protuberance 303 when same position, the size of these air duct 34 width is 0.025mm only, and hence one can see that, the height size of protuberance 303 can impact the optimization numerical value of these air duct 34 width X sizes respectively, and then influences the illumination uniformity result.
Please refer to Fig. 5 A to Fig. 5 C, according to said structure, the present invention also discloses this manufacture method with display device of front optical module, at first, shown in Fig. 5 A, provide a light guide base material 50 with low absorptivity, for example: polymethylmethacrylate (polymethyl methacrylate, PMMA), polycarbonate (Polycarbonate, PC) or cyclic olefin co-polymer materials such as (CycloOlefin Copolymers); Then, shown in Fig. 5 B, form the first surface 501 of micro-structure surface 502 and relative this micro-structure surface 502 with hot forming (hot embossing) or UV resin (UV embossing) technology in this light guide base material 50, wherein, this micro-structure surface 502 has height between 1 to 50 μ m and spaced many protuberances 503 and air duct 54; Shown in Fig. 5 C, one reflected displaying device 6 with display surface 60 is provided again, and this display surface 60 coated adhesive coating 55 to be engaged to this micro-structure surface 502, and place illuminating part (light source) 53 and other assembly at last, form one and have the display device of front optical module.According to above-mentioned manufacture method, respectively the width of this air duct 54 is all different, is that basis is arranged towards the cumulative mode of these illuminating part 53 direction width, and respectively the width of this air duct 54 is to be decided by the spacing of this protuberance 503.See also Fig. 6 A to Fig. 6 C, the manufacture method that shows the protuberance of this micro-structure surface, as shown in the figure, utilize a mould 7 to inject liquid ultraviolet hardening resin 71, to be pressed on for the light guide base material 50 of high light transmittance plastic cement on the mould 7, then irradiation ultraviolet radiation is with this ultraviolet hardening resin 71 that hardens, at last, mould 7 is separated with light guide base material 50, and this ultraviolet hardening resin 71 promptly forms this protuberance 503 on the micro-structure surface 502 of this light guide base material 50.
According to above-mentioned manufacture method, 503 of this display surface 60 and this protuberances form the adhesive coating 55 of thickness between 0.1 to 30 μ m, to engage this reflected displaying device 6 and light guide base material 50.See also Fig. 7 A to 7C, one adhesive coating 55 that belongs to transparent polymer material is applied on the display surface 60 of this reflected displaying device 6, the thickness of then adjusting adhesive coating 55 only buries for the top edge of this protuberance 503, between micro-structure surface 502 and adhesive coating 55, to form this air duct 54, and irradiation ultraviolet radiation makes 55 sclerosis of this adhesive coating and is fixed on display surface 60 and the protuberance 503, promptly finishes engagement step.Wherein, generally adhesive coating 55 materials that use are hot melt adhesive or liquid ultraviolet hardening resin, and utilize modes such as going up glue cylinder or scraper to control its thickness.
503 of this reflected displaying device 6 and protuberances also can adopt the gluing-free mode, starch heterogeneous joint manufacture method as electricity, it starches mode with the micro-structure surface 502 of light guide base material 50 and the surface active of the display surface 60 of reflected displaying device 6 with vacuum electricity slurry or atmospheric electricity earlier, in the pressing mode light guide base material 50 and reflected displaying device 6 is bonded together again.
According to said structure, the present invention is by connecting this micro-structure surface 302 and display surface 40, so that be formed at respectively these protuberance 303 ambient air passages 34 between this light guide base material 30 and this reflected displaying device 4, transmit light with the interface that the incident ray total reflection is provided, and utilize the size of this protuberance 303 and spacing to control amount of light, in air duct 34, light guided to a side in the mode of total reflection, and light is effectively evenly thrown light in reflected displaying device 4 away from illuminating part 33.
Though in the present embodiment, the making of this light guide base material 30 and bonding manufacture method are to be example to adopt plane pressing mode, but be not limited only to this, in other embodiment, also can adopt the rolling-type manufacture method to promote and make speed, but being changed to the person of ordinary skill in the field and can understanding on these manufacture methods is so will not give unnecessary details.
Second embodiment
See also Fig. 8, show the second embodiment of the present invention, the difference of the present embodiment and first embodiment only is to increase structural detail, thus below only just increase structural detail position, shape and function encyclopaedize, state clearly hereby.
As shown in the figure, the first surface 301 of this light guide base material 30 is provided with the many anti-dazzle dimpling block structure 80 of height between 0.1 to 10 μ m, to form micro-nano control photo structure, this structure is wherein one the array of corner post prism, lens, lens pillar and pyramid, or is time wavelength anti-reflection structure.The design of anti-dazzle dimpling block structure 80 thus, reducing dazzle and the ghost that reflected light was caused, and the rising angle of control reflection ray to be promoting contrast and light utilization, and promotes image quality and reduce the front light-source power consumption.
In sum, the micro-structure surface that light guide base material is located in the display device utilization that the present invention has a front optical module connects the display surface of this reflected displaying device, and form air duct around this protuberance, make light be passed to a side, to reach the uniform purpose of distribution of light away from illuminating part; In addition, by setting up many anti-dazzles dimpling block structure, can reach the briliancy of raising front optical module and the purpose of image quality in the first surface of light guide base material.
But above-described specific embodiment; only be in order to illustrate characteristics of the present invention and effect; but not in order to limit the category of implementing of the present invention; under the situation that does not break away from above-mentioned spirit of the utility model and protection domain; the disclosed content of any utilization and the equivalence finished changes and modify all still should be following claim and contains.
Claims (14)
1, a kind of display device with front optical module comprises:
Reflected displaying device has display surface; And
Front optical module, comprise light guide base material and be disposed at this light guide base material one side to produce the illuminating part of light, this light guide base material have the micro-structure surface that is engaged to this display surface, with first surface with respect to this micro-structure surface, and this micro-structure surface has spaced many protuberances and air duct, so that the total reflection interface to be provided.
2, the display device with front optical module according to claim 1, wherein, this protuberance is lens, lens pillar, pyramid, corner post prism, and one of them of trapezoidal column.
3, the display device with front optical module according to claim 1, wherein, the height of this protuberance is between 1 to 50 μ m.
4, the display device with front optical module according to claim 1, wherein, the width of respectively this air duct of this micro-structure surface is all different.
5, the display device with front optical module according to claim 4, wherein, respectively this air duct of different in width is according to arranging towards the cumulative mode of this illuminating part direction width.
6, the display device with front optical module according to claim 1, wherein, the first surface of this light guide base material has many anti-dazzles dimpling block structure.
7, the display device with front optical module according to claim 6, wherein, this anti-dazzle dimpling block structure is lens, lens pillar, pyramid, corner post prism, and one of them of time wavelength anti-reflection structure.
8, the display device with front optical module according to claim 6, wherein, this anti-dazzle dimpling block structured height is between 0.1 to 10 μ m.
9, the display device with front optical module according to claim 1, wherein, the protuberance of this light guide base material, wherein a kind of fabrication techniques of employing hot pressing transcription and ultraviolet hardening resin transcription.
10, the display device with front optical module according to claim 1, wherein, this micro-structure surface is starched the display surface that heterogeneous joint manufacture method technology is engaged to this reflected displaying device by electricity.
11, the display device with front optical module according to claim 1 also comprises the adhesive coating of being located between this micro-structure surface and reflected displaying device.
12, the display device with front optical module according to claim 11, wherein, this adhesive coating is hot melt adhesive, and one of them of liquid ultraviolet hardening resin.
13, the display device with front optical module according to claim 11, wherein, the thickness of this adhesive coating is between 0.1 to 30 μ m.
14, the display device with front optical module according to claim 1, wherein, the juncture between this display surface and light guide base material comprises:
Adhesive coating is applied on the display surface of this reflected displaying device;
The thickness of adjusting adhesive coating only buries for the top edge of this protuberance, to form this air duct between micro-structure surface and adhesive coating; And
Irradiation ultraviolet radiation makes this adhesive coating sclerosis and is fixed on display surface and the protuberance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101600281A CN101464586A (en) | 2007-12-20 | 2007-12-20 | Display equipment with front optical module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101600281A CN101464586A (en) | 2007-12-20 | 2007-12-20 | Display equipment with front optical module |
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| CN101464586A true CN101464586A (en) | 2009-06-24 |
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| CNA2007101600281A Pending CN101464586A (en) | 2007-12-20 | 2007-12-20 | Display equipment with front optical module |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597554A (en) * | 2013-10-31 | 2015-05-06 | 胜华科技股份有限公司 | Anti-dazzle light guide structure and optical diaphragm thereof |
| CN105445820A (en) * | 2014-08-21 | 2016-03-30 | 宸鸿科技(厦门)有限公司 | Optical film assembly |
| CN108519637A (en) * | 2018-04-13 | 2018-09-11 | 京东方科技集团股份有限公司 | Light guide plate and preparation method thereof, front located light source, display device |
| CN108594354A (en) * | 2018-04-27 | 2018-09-28 | 京东方科技集团股份有限公司 | Optics module and display device |
| CN108761628A (en) * | 2015-05-28 | 2018-11-06 | 江苏双星彩塑新材料股份有限公司 | A kind of optical diaphragm for light guide plate |
| CN109031512A (en) * | 2018-09-04 | 2018-12-18 | 京东方科技集团股份有限公司 | Light guide film module, front located light source and reflective display |
| CN110441961A (en) * | 2018-12-20 | 2019-11-12 | 友达光电股份有限公司 | Optics controlling element and display device |
| CN112764136A (en) * | 2019-11-06 | 2021-05-07 | 京东方科技集团股份有限公司 | Optical film and display device |
| CN112987401A (en) * | 2021-03-01 | 2021-06-18 | 捷开通讯(深圳)有限公司 | Reflective display |
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2007
- 2007-12-20 CN CNA2007101600281A patent/CN101464586A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597554A (en) * | 2013-10-31 | 2015-05-06 | 胜华科技股份有限公司 | Anti-dazzle light guide structure and optical diaphragm thereof |
| CN105445820A (en) * | 2014-08-21 | 2016-03-30 | 宸鸿科技(厦门)有限公司 | Optical film assembly |
| CN108761628A (en) * | 2015-05-28 | 2018-11-06 | 江苏双星彩塑新材料股份有限公司 | A kind of optical diaphragm for light guide plate |
| CN108519637A (en) * | 2018-04-13 | 2018-09-11 | 京东方科技集团股份有限公司 | Light guide plate and preparation method thereof, front located light source, display device |
| CN108594354A (en) * | 2018-04-27 | 2018-09-28 | 京东方科技集团股份有限公司 | Optics module and display device |
| US10788614B2 (en) | 2018-04-27 | 2020-09-29 | Beijing Boe Optoelectronics Technology Co., Ltd. | Optical module and display device |
| CN109031512A (en) * | 2018-09-04 | 2018-12-18 | 京东方科技集团股份有限公司 | Light guide film module, front located light source and reflective display |
| US20200073044A1 (en) * | 2018-09-04 | 2020-03-05 | Beijing Boe Display Technology Co., Ltd. | Light guide film assembly, front light source and reflective display device |
| US11002901B2 (en) | 2018-09-04 | 2021-05-11 | Beijing Boe Display Technology Co., Ltd. | Light guide film assembly, front light source and reflective display device |
| CN110441961A (en) * | 2018-12-20 | 2019-11-12 | 友达光电股份有限公司 | Optics controlling element and display device |
| CN112764136A (en) * | 2019-11-06 | 2021-05-07 | 京东方科技集团股份有限公司 | Optical film and display device |
| CN112987401A (en) * | 2021-03-01 | 2021-06-18 | 捷开通讯(深圳)有限公司 | Reflective display |
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Open date: 20090624 |