CN1696800A - Downward luminous face member and downward face luminator - Google Patents
Downward luminous face member and downward face luminator Download PDFInfo
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- CN1696800A CN1696800A CNA2004101031319A CN200410103131A CN1696800A CN 1696800 A CN1696800 A CN 1696800A CN A2004101031319 A CNA2004101031319 A CN A2004101031319A CN 200410103131 A CN200410103131 A CN 200410103131A CN 1696800 A CN1696800 A CN 1696800A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/003—Lens or lenticular sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provided a straight-down type light-emitting surface member, capable of increasing the luminance at a receiving surface, while suppressing the generation of lamp image. A straight-down type light-emitting surface member 20 has a flat surface element portion 21, a receiving surface portion 22, and a light-emitting surface portion 23. The flat surface element portion 21 is designed so as to be formed by a transparent and colorless material. The light-emitting surface portion 23 is designed so as to form a plurality of convex ridges, having inclined planes (non-horizontal surfaces) 25a, 25b.
Description
Technical field
The present invention is about the backlight of liquid crystal indicator, X-ray photograph inspection box (showcasten) etc., rearward (under) configuration light source and the full run-down type that uses are with the light-emitting area member and utilize its full run-down type surface illuminating device.
Background technology
In known techniques, as surface illuminating device, known have with the behind of light-emitting area member (under) the configuration light source constitute basic full run-down type, with the basic side lamp type that constitutes at the side of light guide plate (end face) configuration light source.
Side lamp profile light-emitting device has slimming and is easy to advantage by adopting above-mentioned formation, but because on it constitutes, be difficult to dispose a plurality of light sources, and the utilization ratio of light is descended, so compare, have the shortcoming that is difficult to obtain high brightness with full run-down type.Therefore, usually be the light that utilizes 1 or multi-disc to make to penetrate through light guide plate along the direction vertical with light-emitting area by the lens such as prismatic lens of light harvesting, the utilization ratio that improves light also improves brightness.
On the other hand, the full run-down type surface illuminating device is by adopting above-mentioned formation, and the utilization ratio height of light, and configurable a plurality of light source so compare with the side lamp type, have the advantage that obtains high brightness easily.And the full run-down type surface illuminating device is because its inner space is a hollow structure, so even have the also light advantage of maximization weight.Therefore, can be suitable as the large-scale surface illuminating device that surpasses 15 inches uses.
Yet, in the full run-down type surface illuminating device, because the behind of light-emitting area member (under) the configuration light source, and make the light transmission light-emitting area member that this light source sends and penetrate from its surface (light-emitting area), be this distinctive problem of lamp shadow (shape of light source form the power of the light on the diffuser plate and present) so have one of essential factor of being easy to generate the illuminance distributionization that hinders light-emitting area.In order to handle this problem, as the light-emitting area member, a kind ofly in resin mother metals such as for example transparent propylene and polycarbonate, sneak into diffusant and its dispersion is formed, all on market, sell, and be widely used for uniform milky diffuser plate.This diffuser plate is controlled light transmission rate and light diffusing by the diffusant that utilization is scattered in the resin mother metal, and sees through light in the diffuser plate internal control, and seeks the homogenising of the Luminance Distribution of light-emitting area.
But, the full run-down type surface illuminating device of above-mentioned diffuser plate is equipped with, be difficult to tackle higher recently brightness requirement.Why like this, to be because the diffuser plate that diffusant is disperseed because of there is diffusant in its inside, and makes light be absorbed morely, or to reduce, in any case always produce the loss of light at the diffuser plate place to the light of light-emitting area.In order to reduce the loss of this light, also consider to make the amount of the diffusant in the diffuser plate to reduce.But as reducing diffusant, then be easy to generate lamp shadow, the homogenising of seeking the Luminance Distribution of light-emitting area becomes difficult.
Therefore, carried out to guarantee the homogeneity of the Luminance Distribution of light-emitting area, and can realize the exploitation of the technology of high brightnessization, proposed a kind of for example whole for forming the technology (reference example such as patent documentation 1) of prismatic ditch on the one side of uniform milky diffuser plate.
The spy of [patent documentation 1] Japanese Patent Laid Open Publication opens flat 2001-202814 communique (the 3rd page)
But, in the technology of above-mentioned patent documentation 1, because diffuser plate self has light diffusion function, so form prismatic ditch, the shortcoming that its effect is also little even have.Therefore, in order fully to improve the brightness of light-emitting area, need also on diffuser plate for example other optical sheets such as lens of multi-disc of mounting.Yet, in this case, produce again and make manufacturing engineering become complicated because the member number increases and cause cost up, or sneaking into new problem such as foreign matter between optical sheet and the diffuser plate or between each optical sheet.Therefore, expectation exploitation a kind of with in the resin mother metal, sneak into diffusant and make the different new luminous surface member of diffuser plate of its dispersion.
Summary of the invention
The purpose of this invention is to provide in view of such circumstances a kind of and form, the full run-down type of brightness that can suppress the generation of lamp shadow and improve light-emitting area is with the light-emitting area member and utilize the full run-down type surface illuminating device of this member.
Full run-down type of the present invention with the face illuminated component have the plane body, in the formed sensitive surface of the one side side portion of this plane body, at the formed luminous face of the another side side of aforementioned plane body, for utilize sensitive surface portion be received in aforementioned sensitive surface portion under the light of the light source that disposed, and utilize aforementioned luminous face to send the full run-down type light-emitting area member of the light that has seen through aforementioned plane body; It is characterized in that: aforementioned plane body utilizes water white material to form, and aforementioned luminous face is formed with a plurality of raised lines, and aforementioned raised line has at least a non-horizontal surface in dip plane and the curved surface.
As utilize above-mentioned formation, by being formed with a plurality of luminous faces with raised line of at least a non-horizontal surface in dip plane and the curved surface, can make the light that has seen through water white plane body produce refraction, so can be decomposed into the image (image) that causes because of the light source that is disposed under the sensitive surface portion a plurality of.And, different with known such milky diffuser plate that diffusant is disperseed, have water white plane body, so the light transmission rate height, it is luminous from luminous face that the light that sensitive surface portion is received does not produce big loss ground.
And in above-mentioned full run-down type light-emitting area member, a plurality of raised lines in the aforementioned luminous face form good side by side.In this case, can seek the homogenising of the Luminance Distribution of luminous face.
In addition, above-mentioned full run-down type with the light-emitting area member in, aforementioned sensitive surface portion is formed on the light diffusion part to good.In this case, can make the light diffusion (at random) of reception, and the light of this diffusion can be decomposed into a plurality ofly by light-emitting area portion,, and can seek the homogenising of the Luminance Distribution of luminous face so can suppress lamp shadow more easily.And, owing to only sensitive surface portion is formed on the light diffusion part,, the lamp shadow of luminous face is produced the little problem of effect that suppresses so it is such also can not go out the known diffuser plate of phenomenon.
Full run-down type surface illuminating device of the present invention is characterised in that: comprise that above-mentioned full run-down type is with the light-emitting area member, at the light source that behind disposed of aforementioned full run-down type with the light-emitting area member.
As utilize above-mentioned formation, owing to the generation that can suppress lamp shadow is equipped with, and improve the full run-down type light-emitting area member of the brightness of luminous face, so form the good full run-down type surface illuminating device of a kind of luminous grade.
And in above-mentioned full run-down type surface illuminating device, making aforementioned light source is linear light source, and the long side direction of this linear light source and aforementioned full run-down type roughly the same with the crest line direction of the raised line of the luminous face of light-emitting area member be good.In this case, particularly can suppress more effectively the generation of lamp shadow.
And, in above-mentioned full run-down type surface illuminating device, in the luminous facing side of aforementioned full run-down type with the light-emitting area member, also be arranged on and be formed with the lens of a plurality of raised lines on the one side side by side, and aforementioned lens with the crest line direction of its raised line and aforementioned full run-down type with formed angle θ between the crest line direction of the raised line of the luminous face of light-emitting area member according to more than or equal to 45 °, be configured to good smaller or equal to 90 ° modes.In this case, can suppress the generation of lamp shadow more effectively, and the brightness that improves luminous face, so form the better full run-down type surface illuminating device of luminous grade.
As utilize the present invention, owing to be equipped with and utilize the formed plane of water white material body, be formed with the luminous face of a plurality of specific raised lines, so a kind of generation that can suppress lamp shadow can be provided, and improve the full run-down type light-emitting area member of the brightness of luminous face.And, owing to utilize this full run-down type light-emitting area member, can provide a kind of luminous grade good full run-down type surface illuminating device.
Description of drawings
Figure 1 shows that sectional drawing about the direct-type backlight of an example of the present invention.
Figure 2 shows that the oblique view of the direct-type backlight of having removed upper and lower frames and lens.
Figure 3 shows that the sectional drawing of another example of the raised line of luminous face.
Figure 4 shows that the sectional drawing of another example of the raised line of luminous face.
Fig. 5 is the expanded view of the dotted line A of Fig. 1.
Fig. 6 is the oblique view of the direct-type backlight of dismounting upper and lower frames.
The explanation of symbol
10: direct-type backlight (full run-down type surface illuminating device)
12: lower frame
13: light source
13a: linear light source
20: full run-down type light-emitting area member
21: the plane body
22: sensitive surface portion
23: luminous face
25: raised line
25a, 25b: the dip plane of raised line (non-horizontal surface)
25c: the crest line of raised line
27: transparent base layer
28: diffusant
30: prismatic lens
35: raised line
35a, 35b: dip plane
35c: crest line
41a, 41b, 41c, 41d: dip plane
P1, P2: the spacing of raised line
L: the spacing of linear light source
Embodiment
Below, with reference to accompanying drawing preferable example of the present invention is described.Fig. 1 is the broad cross-section map about the structure of the direct-type backlight of an example of full run-down type surface illuminating device of the present invention.Comprise that about the formation of the direct-type backlight 10 of this example for example being configured in the rear side of liquid crystal indicator uses, and the lower frame 12 of an opening, the full run-down type that is configured with the form of stopping up aforementioned opening with light-emitting area member (following is called [light-emitting area member]) 20, be configured in aforementioned light-emitting area member 20 the behind (under) the upper ledge (not shown) of light source 13, the prismatic lens 30 that is configured in the top of aforementioned light-emitting area member 20, the top that is configured in aforementioned light-emitting area member 20 and covering lower frame 12.And, utilize lower frame 12 and not shown upper ledge to constitute the framework of direct-type backlight.
Lower frame 12 is formed by various metal materials or resin material, the form that has the bottom surface of rectangle, enlarges with this opening to the open side side (side, left and right side up and down) that prolongation is provided with that tilts from the bottom surface, and form the shape that one side (Fig. 1's is top) has big opening.Reflector plates such as white color system scattered reflection sheet or metallic luster reflector plate are laid in each side and bottom surface, or apply white coating etc., with formation diffusely reflecting surface or normal reflection face, and the light that can effectively utilize light source 13 to send.But,, be good so form diffusely reflecting surface because under the situation of normal reflection face, be easy to generate lamp shadow.
On the other hand, the upper ledge utilization for example forms with lower frame 12 congener formation materials, have to the outside penetrate light window portion above, go up towards open side from this and to extend the side (side, left and right side up and down) that is provided with, and formation can utilize this opening to cover the shape of aforementioned lower frame 12.
With reference to Fig. 2, light source 13 utilizes the lamp of white resin systems such as polycarbonate to support seat (not shown), support many (for example 12) for example diameter count the linear light source 13a such as fluorescent lamp of the elongated cold cathode cast about mm and constitute, and be incorporated in the lower frame 12.Each linear light source 13a the behind of light-emitting area member 20 (under) with certain spacing (distance between each linear light source 13a) configuration side by side.Here, spacing L takes the circumstances into consideration to determine according to the size of direct-type backlight 10 etc., but under 15 inches situation for example, is set to more than or equal to 15mm, smaller or equal to 35mm.In addition, be connected with not shown well-known electric components such as phase inverter, with the light-off of lighting a lamp at light source 13.
Light-emitting area member 20 have plane body 21, the integrally formed sensitive surface portion 22 of the one side side (light source 13 sides) of this plane body 21, the another side side of aforementioned plane body 21 integrally formed luminous facial 23.And, the rigidity that the thickness of light-emitting area member 20 can this degree of deflection in order to ensure on the opening that is disposed at lower frame 12 time, it is good being set at more than or equal to 1.5mm, is more preferred from more than or equal to 2.0mm.But, if blocked up then might cause weight to rise and cost up, would be good so be set at smaller or equal to 3.0mm.
And plane body 21 utilizes various colourless transparent materials such as transparent resin (acrylic resin etc.) or glass and forms water white plate shaped.This plane body 21 does not contain the diffusant that is used to make through light diffusion (at random), and different with known diffuser plate, light transmission rate is very high.Specifically, the light transmission rate of plane body 21 self is more than or equal to 80%, is preferably more than or equal to 95%.
And, luminous facial 23 make many to have plane body 21 raised line 25 of the section triangle of (for example 60 °) dip plane (non-horizontal surface) 25a, 25b of tilting at a certain angle, with utilize the parallel and formation arranged side by side of the formed crest line 25c of its dip plane 25a and dip plane 25b, constitute lens face (prism facets).The height of each raised line 25 is set to smaller or equal to 30 μ m, and luminous facial 23 thickness is compared quite little with the thickness of plane body 21.In addition, in each accompanying drawing of this instructions, amplify expression in order to emphasize raised line 25.
The spacing of luminous facial 23 raised line 25 (distance between the crest line 25c of each raised line 25) P1, it is good being set to smaller or equal to 500 μ m, is more preferred from smaller or equal to 100 μ m.Why like this, though be because the image of linear light source 13a is decomposed by utilizing dip plane 25a, 25b light is reflected and penetrating to different directions, but P1 is excessive as spacing, the image of linear light source 13a is decomposed morely, or more light is penetrated to normal direction (frontal) direction in addition of luminous facial 23a.And, also, then might make the lines of raised line become showy, luminous grade variation because too big as spacing P1.
Each raised line 25 of luminous facial 23 is so that the roughly the same form of long side direction of the direction of its crest line 25c and linear light 13a and forming.By this, the image of linear light source 13a can similarly be decomposed in the arbitrary place on luminous facial 23, so help the homogenising of luminous facial 23 Luminance Distribution.
As described above luminous facial 23 utilize for example injection moulding etc. and integrally formed with plane body 21, or be fitted on the plane body 21, or utilize transparent sticker to be fitted on the plane body 21 the well-known lens (prismatic lens) and form by the buckle layer (layers of prisms) that makes mades such as UV hardening resin.
In addition, luminous facial 23 raised line 25 is not limited to section triangle as described above, also can be the raised line of the section polygon of section pentagon shape (with reference to Fig. 3) with dip plane 41a, 41b, 41c, 41d etc., or has a raised line of the section semi-circular shape (lenticular is with reference to Fig. 4) of the curved surface 42 that is set to the certain curvature radius.As be section pentagon shape or section semi-circular shape, because the image of linear light source 13a decomposed more, thus the generation of lamp shadow can further be suppressed, and help the homogenising of the brightness of light-emitting area.That is, in the present invention, luminous facial 23 constitute by being formed with a plurality of raised lines 25 with at least a non-horizontal surface (to plane body 21 uneven faces) in dip plane and the curved surface.
And, sensitive surface portion 22 as shown in Figure 5, be formed on the thin diffusion pearl layer (light diffusion part) that diffusants 28 such as making pearl in the transparent base layer 27 of ultraviolet light absorbers such as containing good benzophenone series of photostability or benzoic ether system disperses, and the light that can utilize diffusant 28 that sensitive surface portion 22 is received spreads (at random).Diffusant 28 is so that the mist degree (haze) of light-emitting area member 20 integral body value (turbidity value, cloud value) is more than or equal to 70%, is more preferred from more than or equal to 85% form to disperse in transparent base layer 27.Because little as haze value, then the amount of diffusant 28 is very few, might can't obtain diffusion effect fully in sensitive surface portion 22.And in order to obtain the light diffusion effect, it is good that the thickness of sensitive surface portion 22 is set to more than or equal to 1.0 μ m.But, then same if too in thick with known diffuser plate, might fully obtain the effect that the generation of lamp shadow that luminous facial 23 raised line 25 is caused suppresses, be good so be set to smaller or equal to 5.0 μ m.
With reference to Fig. 6, lens (prismatic lens) 30 makes many raised lines 35 with section triangle of dip plane 35a, 35b, form side by side and constitute with certain spacing P2 (for example about 100 μ m), and be configured in aforementioned light-emitting area member 20 luminous facial 23 on.Specifically, so that the crest line 25c direction of luminous facial 23 raised line 25 of light-emitting area member 20, and formed angle θ between the crest line 35c direction of the raised line 35 of lens 30, be in according to more than or equal to 45 °, carry out mounting smaller or equal to the form in 90 ° the scope.Here, angle θ being in the above-mentioned scope, is owing to following reason.That is, angle θ is big more, and brightness is high more, reaches maximum in the time of 90 °.Yet, though above-mentioned light-emitting area member 20 exists the lamp shadow of frontal (normal direction of light-emitting area member 20) good, when looking into the distance light-emitting area member 20 from vergence direction, the problem of lamp shadow variation.This be because, because the crest line 25c direction of luminous facial 21 raised line 25 of light-emitting area member 20 is the direction identical with the long side direction of linear light source 13a, so under the situation of looking into the distance from vergence direction, the image that can regard linear light source 13a as is undecomposed.By this, when the crest line 35c of the raised line 35 that makes lens 30 direction, to the crest line 25c direction of long side direction and luminous facial 23 the raised line 25 of linear light source 13a, when tilting with certain angle, but the limits vision angle, the result can improve the lamp shadow of linear light source 13a more.And the effect of improving of this lamp shadow reaches maximum when angle θ is 45 °.Thus, lens face 30 considers that brightness improve effects and lamp shadow improves effect, make angle θ according to more than or equal to 45 °, be configured to good smaller or equal to the suitable angle in 90 ° of scopes.In addition, as make angle θ=0 ° and configuration lens 30, then produce Moire fringe (interference fringe), so be configured not good with this angle θ.
Here, in following table 1, represent the relative position relation of linear light source 13a, light-emitting area member 20, lens 30, with the luminance of this moment.
[table 1]
| The crest line direction of the raised line of light-emitting area member | Parallel with linear light | Vertical with linear light | |||
| The crest line direction of the raised line of prismatic lens (to the raised line of light-emitting area member) | Parallel | ??90° | ??45° | ??90° | In addition |
| Luminance | Produce Moire fringe | The brightness maximum | Luminous grade the best | Lamp shadow is poor slightly | Lamp shadow is poor |
In direct-type backlight 10 about this example of adopting above-mentioned formation, use to be formed with luminous facial 23 light-emitting area member 20, wherein this luminous facial 23 has specific raised line 25 on the one side of water white plane body 21.Therefore, when rearward (under) light of the light source 13 of configuration is when luminous facial 23 of light-emitting area member 20 penetrates, the image of light source 13 of resulting from is broken down into a plurality of.By this, can suppress the generation of lamp shadow effectively.Specifically, though in side lamp profile light-emitting device of known techniques etc., use lens to improve sheet, but this lens to be in order concentrating light and the brightness that improves frontal is used to frontal, and to be not used in to make and to result from the image of light source 13 and be decomposed into a plurality of as brightness.Promptly, known techniques is to utilize the light of homogenized light such as diffusion sheet as the incident lens by supposition, and utilize lens to carry out light harvesting this incident light to frontal, and and play the effect that improves brightness, do not play being decomposed into a plurality of effects with resulting from the image of light source 13.To this, in this example, though spread from the light of light source 13 light diffusion part by sensitive surface portion 22, in the light that has seen through this sensitive surface portion 22, residual have result from the image of light source 13.And sensitive surface portion 22 forms one with plane body 21, and is formed with luminous facial 23 on this plane body 21.Therefore, in light transmission plane body 22 incidents that received by sensitive surface portion 22 luminous facial 23 o'clock, also residual have result from the image of light source 13, by this image is decomposed by luminous facial 23 specific raised line, can suppress the generation of lamp shadow effectively.Promptly, luminous facial 23 of this example has known lens can not bring into play function, be decomposed into a plurality of functions with resulting from the image of light source 13, and by making this bring into play this function, can suppress the peculiar problem of full run-down type surface illuminating device effectively is the generation of lamp shadow.
And the light-emitting area member 20 water white material formation owing to its plane body 21 utilizes about this example so compare with the diffuser plate that makes the diffusant diffusion, can improve brightness.In addition, because sensitive surface portion 22 forms a kind of diffusion pearl layer (light diffusion part) that contains ultraviolet light absorber,, and also can utilize the light diffusion effect to seek the homogenising of luminous facial 23 Luminance Distribution so photostability is good.And, because that the light that will utilize sensitive surface portion 22 to be spread is decomposed into by luminous facial 23 is a plurality of, so can suppress lamp shadow more.And, owing to have the big plane body 21 of thickness to luminous facial 23 from sensitive surface portion 22, so utilize the diffusion pearl layer (light diffusion part) of sensitive surface portion 22 to spread fully, thereby can utilize luminous facial 23 pairs of images that result from light source 13 to decompose, and suppress lamp shadow more.And, in known diffuser plate, owing to be in diffuser plate integral body, to disperse to be used for light absorbing diffusant, so the loss of light is quite big, but in light-emitting area member 20 about this example, owing to only make diffusant dispersion in thin diffusion pearl layer (light diffusion part), so the loss of light is diminished and seek high brightnessization.By this, the direct-type backlight 10 about this example of utilizing this light-emitting area member 20 forms the good direct-type backlight of luminous grade.
And, in direct-type backlight 10,, can reduce Master Cost so have even do not use more various optical sheets also comparatively bright about this example, and can reduce the time that is used to remove the foreign matter between optical sheet, and suppress because of sneaking into the advantage of the bad phenomenon that foreign matter causes.In addition, particularly in large-scale direct-type backlight, though also have the problem that has the deflection and the distortion that are easy to generate optical sheet, the advantage that this problem also reduces.In addition, in direct-type backlight 10 about this example, when in plane body 21, using water white glass, thermal expansion that heat caused and the warpage sent because of light source are few, can make the distance of light source 13 and light-emitting area member 20 approaching so also have, the advantage that can seek slimming.And in the direct-type backlight 10 about this example, when sensitive surface portion 22 forms the light diffusion parts, and the bottom surface of lower frame 12 and side be when forming diffusely reflecting surface, has each diffusion is interacted, and suppresses the advantage of lamp shadow more effectively.
Here, the validation test that the present inventor is carried out is illustrated.In this validation test, (section is the raised line of semi-circular shape to form biconvex lens by preparation on the one side of the water white transparency tabular body (thickness 2mm) of acrylic resin system, height=100 μ m, spacing P1=250 μ m), and the light-emitting area member (enforcement sample) that on another side, forms the diffusion pearl layer (haze value 82%) of thick 20 μ m and constitute, milky diffuser plate (light transmission rate 53% with the acrylic resin system that diffusant is disperseed, thick 2mm) the light-emitting area member (comparative sample) that is constituted, the light-emitting area member of using as 20 inches direct-type backlight, and after being separately positioned on them on the opening portion of direct-type backlight lower frame, again at each luminous facing side mounting prismatic lens (spacing P2=50 μ m), and to whether producing lamp shadow and brightness is investigated.By the result as can be known, light-emitting area member and the comparative sample of implementing sample are same, can not find lamp shadow, and brightness be comparative sample brightness 118%.Can confirm that by this light-emitting area member of implementing sample can suppress the generation of lamp shadow, and can realize high brightnessization.
In addition, the present invention is not limited to above-mentioned example.For example, require under the not strong situation in the homogenising to luminous facial 23 Luminance Distribution, sensitive surface portion 22 can be not the light diffusion part also, and is the surface (formation sensitive surface) of plane body 21.And the light diffusion part of sensitive surface portion 22 also can be with haze value more than or equal to 70% diffusion sheet, utilizes the sticker that contains the sticker of diffusant or do not contain diffusant to fit and form.And, under the situation of the homogenising that does not require very high brightness and Luminance Distribution, also can not use lens 30.
In addition, light-emitting area member 20 also may not be seized on both sides by the arms between lower frame 12 and upper ledge, also configurable upside at upper ledge.And the bottom surface of lower frame 12 also may not be smooth, also can be the shape of waveform.
And the employed direct-type backlight of rear side that full run-down type surface illuminating device of the present invention is not limited to liquid crystal indicator also can be used as the inspection box, the needs that are used to see X-ray photograph billboard backlight, is used to see the uses such as device of photographic negative.
Claims (6)
1. full run-down type light-emitting area member, have the plane body, in the formed sensitive surface of the one side side portion of this plane body, at the formed luminous face of the another side side of aforementioned plane body, for utilize sensitive surface portion be received in aforementioned sensitive surface portion under the light of the light source that disposed, and utilize aforementioned luminous face to send the light that has seen through aforementioned plane body, it is characterized in that:
Aforementioned plane body utilizes water white material to form, and aforementioned luminous face is formed with a plurality of raised lines, and aforementioned raised line has at least a non-horizontal surface in dip plane and the curved surface.
2. full run-down type light-emitting area member as claimed in claim 1 is characterized in that: a plurality of raised lines on the aforementioned luminous face form side by side.
3. full run-down type light-emitting area member as claimed in claim 1 or 2 is characterized in that: aforementioned sensitive surface portion is formed on the light diffusion part.
4. full run-down type surface illuminating device is characterized in that:
Has each described full run-down type in the claim 1～3 with the light-emitting area member, and at the light source that behind disposed of aforementioned full run-down type with the light-emitting area member.
5. full run-down type surface illuminating device as claimed in claim 4 is characterized in that:
Aforementioned light source is linear light source, and the crest line direction of the raised line of the luminous face of the long side direction of this linear light source and aforementioned full run-down type usefulness light-emitting area member is roughly the same.
6. full run-down type surface illuminating device as claimed in claim 5 is characterized in that:
At the luminous facing side of aforementioned full run-down type with the light-emitting area member, also be arranged on and be formed with the lens of a plurality of raised lines on the one side side by side, and aforementioned lens with the crest line direction of its raised line and aforementioned full run-down type with formed angle θ between the crest line direction of the raised line of the luminous face of light-emitting area member according to more than or equal to 45 °, be configured smaller or equal to 90 ° modes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004140030A JP2005322524A (en) | 2004-05-10 | 2004-05-10 | Light-emitting surface member for straight down type and straight down type light-emitting device |
| JP2004140030 | 2004-05-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1696800A true CN1696800A (en) | 2005-11-16 |
Family
ID=35349577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004101031319A Pending CN1696800A (en) | 2004-05-10 | 2004-12-31 | Downward luminous face member and downward face luminator |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2005322524A (en) |
| KR (1) | KR100686249B1 (en) |
| CN (1) | CN1696800A (en) |
| TW (1) | TWI290203B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608807A (en) * | 2006-06-21 | 2012-07-25 | 三星电子株式会社 | Integral optical plate, and backlight assembly and liquid crystal display apparatus having the same |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4984512B2 (en) * | 2005-12-09 | 2012-07-25 | ソニー株式会社 | Surface light emitting device and liquid crystal display device |
| US7804554B2 (en) | 2005-12-09 | 2010-09-28 | Sony Corporation | Surface emitting device and liquid crystal display |
| TW200728848A (en) | 2006-01-20 | 2007-08-01 | Au Optronics Corp | Light diffusion module and backlight module using the same |
| CN101410668A (en) * | 2006-03-31 | 2009-04-15 | 日本瑞翁株式会社 | Direct-type backlight device |
| EP1855151B1 (en) * | 2006-05-10 | 2013-02-20 | Samsung Display Co., Ltd. | Optical plate, method of manufacturing optical plate, backlight assembly and liquid crystal display device |
| JP4689543B2 (en) * | 2006-06-14 | 2011-05-25 | 株式会社クラレ | LIGHTING DEVICE, LIGHT CONTROL MEMBER INCLUDING THE SAME, AND IMAGE DISPLAY DEVICE USING THE SAME |
| JP4826377B2 (en) * | 2006-07-28 | 2011-11-30 | 凸版印刷株式会社 | Optical sheet and backlight unit and display using the same |
| JP2008146886A (en) * | 2006-12-06 | 2008-06-26 | Sony Corp | Surface light emitting device, and display device including the same |
| JP5399615B2 (en) * | 2007-01-31 | 2014-01-29 | 株式会社ジャパンディスプレイ | Display device |
| KR100837305B1 (en) * | 2007-03-15 | 2008-06-12 | 엘지전자 주식회사 | Optical sheet, backlight unit and liquid crystal display device using the same |
| CA2879977C (en) * | 2012-08-07 | 2020-08-18 | University Of South Alabama | Spectral illumination device and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5161041A (en) * | 1990-04-26 | 1992-11-03 | Ois Optical Imaging Systems, Inc. | Lighting assembly for a backlit electronic display including an integral image splitting and collimating means |
| JP3267725B2 (en) * | 1993-02-26 | 2002-03-25 | 日本ライツ株式会社 | Surface light source device |
| JP3968155B2 (en) * | 1997-09-17 | 2007-08-29 | 大日本印刷株式会社 | Prism sheet |
| JP3860298B2 (en) * | 1997-07-17 | 2006-12-20 | 大日本印刷株式会社 | Optical sheet, surface light source device, and transmissive display device |
-
2004
- 2004-05-10 JP JP2004140030A patent/JP2005322524A/en active Pending
- 2004-10-27 TW TW093132520A patent/TWI290203B/en not_active IP Right Cessation
- 2004-12-22 KR KR1020040110276A patent/KR100686249B1/en not_active IP Right Cessation
- 2004-12-31 CN CNA2004101031319A patent/CN1696800A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608807A (en) * | 2006-06-21 | 2012-07-25 | 三星电子株式会社 | Integral optical plate, and backlight assembly and liquid crystal display apparatus having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20050107732A (en) | 2005-11-15 |
| JP2005322524A (en) | 2005-11-17 |
| KR100686249B1 (en) | 2007-02-22 |
| TW200537054A (en) | 2005-11-16 |
| TWI290203B (en) | 2007-11-21 |
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Owner name: NIPPON ELECTRIC CO Free format text: FORMER OWNER: SUMITOMO RUBBER INDUSTRIE. LTD. Effective date: 20061215 |
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Effective date of registration: 20061215 Address after: Kanagawa Applicant after: NEC LCD Tech Corp. Address before: Hyogo Applicant before: Sumitomo Rubber Industries, Ltd. |
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Open date: 20051116 |