CN1779529A - Surface light source device and backlight unit having the same - Google Patents
Surface light source device and backlight unit having the same Download PDFInfo
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- CN1779529A CN1779529A CNA2005101233620A CN200510123362A CN1779529A CN 1779529 A CN1779529 A CN 1779529A CN A2005101233620 A CNA2005101233620 A CN A2005101233620A CN 200510123362 A CN200510123362 A CN 200510123362A CN 1779529 A CN1779529 A CN 1779529A
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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
- G02F1/133604—Direct backlight with lamps
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/20—Constructional details
- H01J11/22—Electrodes, e.g. special shape, material or configuration
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/20—Constructional details
- H01J11/34—Vessels, containers or parts thereof, e.g. substrates
- H01J11/36—Spacers, barriers, ribs, partitions or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/305—Flat vessels or containers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Plasma & Fusion (AREA)
- Nonlinear Science (AREA)
- Materials Engineering (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
A surface light source device includes a light source body having a plurality of discharge spaces that are divided into a light-emitting region and a non-light-emitting region. The light-emitting region has a first cross sectional area. The non-light-emitting region has a second cross sectional area larger than the first cross sectional area. An electrode for applying a voltage to a discharge gas, which is injected into the discharge spaces, is provided to a portion of the light source body corresponding to the non-light-emitting region. Thus, a larger amount of the discharge gas may be distributed in the non-light-emitting region than in the light-emitting region. As a result, the electrode may not serve as a dark field. Further, the surface light source device may have a long life span.
Description
Technical field
The present invention relates to a kind of surface light source device and back light unit with described surface light source device.The invention particularly relates to and a kind ofly have the surface light source device that is used for plane of departure light and the back light unit of described surface light source device as light source.
Background technology
Usually, liquid crystal (LC) has special electricity and light characteristic.Specifically, when the electric field that is applied to LC changed, the arrangement of LC molecule also was changed.Therefore, changed optical transmittance (optical transmittance).
LCD (LCD) device uses the above-mentioned feature display image of LC.The LCD device has many advantages, and for example volume is little, in light weight etc.Therefore, above-mentioned LCD device is used in various fields, for example notebook computer, mobile phone, TV etc.
The LCD device comprises that liquid crystal control assembly and light provide parts.Liquid crystal control assembly control LC.Light provides parts to provide light for described liquid crystal control assembly.
The liquid crystal control assembly be included in pixel electrode that first substrate (substrate) forms, public electrode that second substrate forms and be inserted into pixel electrodes and public electrode between liquid crystal layer.The quantity of pixel electrode determines that according to resolution the number of public electrode is one.Each pixel electrode all is electrically connected with thin film transistor (TFT) (TFT), so that by TFT pixel electrode is applied pixel voltage.On above-mentioned public electrode, be applied with reference voltage.Pixel electrodes and public electrode all comprise conductivity and light transparent materials.
Above-mentioned light provides parts to provide light to above-mentioned liquid crystal control assembly.The light that provides parts to produce from above-mentioned light sequentially passes pixel electrodes, liquid crystal layer and public electrode.Therefore, brightness (luminance) and brightness uniformity (uniformity) have very large influence to the display quality of above-mentioned LCD device.
Traditional light provides parts to use cold-cathode fluorescence lamp (CCFL) or light emitting diode (LED).Above-mentioned CCFL has long column shape, and above-mentioned LED has the point shape.
CCFL has high brightness and long serviceable life, and produces less heat.But LED has high relatively power consumption has better color reprodubility.Yet CCFL and LED have low brightness uniformity.
Therefore, in order to improve brightness uniformity, above-mentioned light provides parts to need for example opticses such as light guide plate (LGP), diffuse component and prismatic lens.Therefore, the volume and weight of above-mentioned LCD device all can increase.
In order to address the above problem, people have developed a kind of surface light source device.This surface light source device can be classified as partition wall-cut apart (partition wall-separated) type and partition wall-integration (partition wall-integrated) types of devices.
Traditional partition wall-Splittable surface light source device comprises first and second substrates that are separated from each other, and is inserted in a plurality of partition walls between first and second substrates.Partition wall is arranged parallel to each other basically to limit a plurality of discharge spaces that inject discharge gas in it.Be inserted with seal member between first and second substrates, with discharge space and external isolation.The inside surface of first and second substrates is formed with fluorescence coating.Be used to discharge gas to provide the electrode of voltage to be set at the marginal portion of first and second substrates or be set in first and second substrates.
On the contrary, traditional partition wall-integration surface light source device comprises first substrate and second substrate, and described second substrate has integrally formed thereupon partition wall portions.Outermost partition wall portions is engaged to first substrate by the sealing welding, to form a plurality of discharge spaces that inject discharge gas in it.Be formed with fluorescence coating on the inside surface of first and second substrates.For discharge gas provides in the marginal portion or first and second substrates that the electrode of voltage is set at first and second substrates.
In above-mentioned traditional surface light source device, for discharge gas is provided to discharge space, discharge space communicates with each other.For instance, for the passage of discharge gas is provided in partition wall, is arranged as partition wall snakelike or passes partition wall and form the hole.
Yet, in traditional surface light source device, the width of the non-luminous region that covers by electrode and highly be substantially equal to the light-emitting zone that those are not covered by electrode.Non-luminous region and light-emitting zone have and are used to the tubulose electric current (tubularcurrent) that makes surface light source device luminous.Usually, make surface light source device have high brightness, need first and second substrates to have thin thickness in order to utilize suitable tubulose electric current.When first and second substrates are blocked up, to compare with surface light source device with relative thin substrate, the control transfer of heat of the plasma generation in the discharge space is slow.Therefore, the surface light source device with thick substrate has low brightness.Yet though the ratio that is reduced to of the increase of surface light source device brightness and substrate thickness, the minimizing of substrate thickness is conditional.
In addition, in traditional surface light source device, the outermost discharge space adjacent with the outside cools off quickly than other discharge space, and outermost thus discharge space has the brightness lower than other discharge spaces.
Summary of the invention
The invention provides a kind of by in non-luminous region, producing the surface light source device that a large amount of electronic secondarys has uniform luminance.
The present invention also provides a kind of back light unit with above-mentioned surface light source device.
Surface light source device according to one aspect of the invention can comprise the light source body, and described light source body has a plurality of discharge spaces that are divided into light-emitting zone and non-luminous region.Described light-emitting zone has first sectional area.Described non-luminous region has second sectional area greater than first sectional area.The electrode that is used for the discharge gas that is injected into discharge space is applied voltage is arranged on the part of light source body corresponding to non-luminous region.
According to an embodiment, the width of described non-luminous region can be greater than described light-emitting zone.The height of described non-luminous region can be greater than described light-emitting zone.The width of described non-luminous region and highly can be greater than the width of described light-emitting zone and height.In addition, outermost discharge space has the 3rd sectional area greater than described second sectional area in the described discharge space.
According to another embodiment, described electrode can be formed on two outside surfaces of described light source body.Auxiliary electrode can extend from the marginal portion of described electrode, so that the described marginal portion of described electrode has the width of the center section of being wider than described electrode.
According to another embodiment, the light source body can comprise: first substrate; Be arranged on second substrate of described first substrate top; Seal member, it is inserted between the marginal portion of described first substrate and described second substrate to limit the inner space; And be arranged in the described inner space to limit the partition wall of described discharge space.The extension, space up is formed on the part of second substrate corresponding to non-luminous region, so that the non-luminous region with second sectional area to be provided.Alternatively, the extension, space can down be formed on the part of first substrate corresponding to non-luminous region.In addition, extension, second space is formed on two ends of the qualification outermost discharge space of first and/or second substrate, has described the 3rd sectional area greater than described second sectional area with the described non-luminous region in described outermost discharge space.
According to another embodiment, the light source body comprises: first substrate; Second substrate integrally formed with partition wall portions, described partition wall portions contact with described first substrate to form discharge space.The extension, space up is formed on the part of described second substrate corresponding to described non-luminous region, so that described non-luminous region has described second sectional area.Alternatively, the extension, space can down be formed on the part of described first substrate corresponding to described non-luminous region.In addition, extension, second space is formed on two ends of the qualification outermost discharge space of first and/or second substrate, so that the described non-luminous region in the described outermost discharge space has the 3rd sectional area greater than described second sectional area.
Surface light source device according to a further aspect of the present invention can comprise the light source body, and described light source body has to middle discharge space that wherein injects discharge gas and outermost discharge space.Light-emitting zone and non-luminous region in the middle of discharge space comprised in the middle of each was described, the width of described non-luminous region is substantially equal to the width of described middle light-emitting zone.Each described outermost discharge space comprises the outermost light-emitting zone with first sectional area and has the outermost non-luminous region of second sectional area that described second sectional area is greater than described first sectional area.The electrode that is used for described discharge gas is applied voltage is arranged at described light source body.
Back light unit according to a further aspect of the present invention comprises: surface light source device, be used to admit the shell of described surface light source device, be inserted into the optical sheet between described surface light source device and the described shell, and the transducer that is used for sparking voltage is loaded into described surface light source device.Described surface light source device comprises the light source body, and described light source body has a plurality of discharge spaces that are divided into light-emitting zone and non-luminous region.Described light-emitting zone has first sectional area.Described non-luminous region has second sectional area greater than first sectional area.The electrode that is used for the discharge gas that is injected into discharge space is applied voltage is arranged on the part of described light source body corresponding to described non-luminous region.
According to the present invention, described non-luminous region has the sectional area greater than described light-emitting zone, and the discharge gas that is distributed in thus in the described non-luminous region is more.Therefore described electrode does not play the effect of details in a play not acted out on stage, but told through dialogues.In addition, described surface light source device can have long life span.
Description of drawings
After by the reference accompanying drawing exemplary of the present invention being described in detail, above-mentioned and further feature of the present invention and beneficial effect can be clearer, wherein:
Fig. 1 is the stereographic map of describing according to the surface light source device of first exemplary of the present invention;
Fig. 2 is the cut-open view that obtains along IIa-IIb line among Fig. 1;
Fig. 3 is the cut-open view that obtains along IIIa--IIIb line among Fig. 1;
Fig. 4 describes the planimetric map that partition wall is arranged in first substrate;
Fig. 5 is the stereographic map of describing according to the surface light source device of second exemplary of the present invention;
Fig. 6 is the cut-open view that obtains along VIa-VIb line among Fig. 5;
Fig. 7 is the cut-open view that obtains along VIIa-VIIb line among Fig. 5;
Fig. 8 is the stereographic map of describing according to the surface light source device of the 3rd exemplary of the present invention;
Fig. 9 is the cut-open view that obtains along IXa-IXb line among Fig. 8;
Figure 10 is the cut-open view that obtains along Xa-Xb line among Fig. 8;
Figure 11 describes the planimetric map that partition wall portions is arranged in first substrate;
Figure 12 is the stereographic map of describing according to the surface light source device of the 4th exemplary of the present invention;
Figure 13 is the cut-open view that obtains along XIIIa-XIIIb line among Figure 12;
Figure 14 is the cut-open view that obtains along XIVa--XIVb line among Figure 12;
Figure 15 is the planimetric map of describing according to the surface light source device of the 5th exemplary of the present invention;
Figure 16 is the planimetric map of describing according to the surface light source device of the 6th exemplary of the present invention;
Figure 17 is the exploded perspective view of describing according to the back light unit of the 7th embodiment of the present invention.
Embodiment
With reference to the respective drawings that shows embodiment of the present invention the present invention is described more fully hereinafter.Yet the present invention can be with various multi-form embodiments, and should not be subjected to the restriction of the embodiment that proposes here.Say that more correctly the purpose that these embodiments are provided is to be fully and completely in order to make content disclosed herein, and fully transmits protection scope of the present invention to those of ordinary skill in the art.In the accompanying drawings, for purpose clearly, the size in element and zone and relative size may be by exaggerative.
Should be appreciated that, at element or layer when being described to " on being positioned at ", " being connected to " or " being engaged to " another element, its meaning is that this element or layer can be located immediately at, are connected or join to other element or layer, perhaps can have intervenient element.On the contrary, when element is described to " on being located immediately at ", " being directly connected to " or " by directly joining to " another element, then there is not intervenient element.All identical labels are represented identity element.As used herein like that, term " and/or " comprise one or more relevant terms of listing arbitrarily and all combinations.
Should be appreciated that although can use first, second grade of term to describe various elements, these elements should not limited by these terms here.Above-mentioned term only is to be used to make an element to be different from another element.Like this, first element that will discuss below can be called as second element, and can not deviate from instruction of the present invention.
Smoothness here in order to describe, can use the term with space correlation, for example " ... under ", " in ... below ", " bottom ", " ... the top ", " top " or similar terms describe element among the figure or the device relation with respect to other element or device (features).It should be understood that intention with the term of space correlation except the direction of describing in the drawings, also contained use or operation in the different directions of device.For example,, then being described to the element of " below other element or device " or " under other element or device " or device if device in the drawings is reversed will be towards being positioned at above-mentioned other element or device top.Like this, exemplary term " in ... below " can comprise the above and below both direction.In addition, this device can be towards other direction (as revolve turn 90 degrees or other angle), and also should have corresponding explanation with the description term with space correlation that uses here.
Here the term of Shi Yonging only is in order to describe the purpose of specific embodiments, is not restriction the present invention.As used herein the same, singulative " " and " being somebody's turn to do " should also comprise the implication of plural number, unless this content has been done clear and definite phase antirepresentation.It should further be appreciated that term " comprises " and/or offered some clarification on " having comprised (including) " existence of described device, integral body, step, operation, element and/or assembly when using in this manual, but do not get rid of the existence or the interpolation of one or more other devices, integral body, step, operation, element, assembly and/or their combination.
Unless opposite qualification is arranged, here all terms of Shi Yonging (comprising technical term and scientific terminology) have and the identical meaning of those of ordinary skills institute common sense.It should further be appreciated that, should be interpreted as having the aggregatio mentium that in the context of correlative technology field, has with them such as the term that in the dictionary of public use, defines, and can not be with idealized or formal meaning interpretation fully, unless clear and definite definition is here arranged.
Embodiment 1
Fig. 1 is the stereographic map of describing according to the surface light source device of first exemplary of the present invention, Fig. 2 is the cut-open view that obtains along IIa-IIb line among Fig. 1, Fig. 3 is the cut-open view that obtains along IIIa-IIIb line among Fig. 1, and Fig. 4 describes the planimetric map that partition wall is arranged in first substrate.
Referring to figs. 1 through Fig. 4, comprise light source body 110 and electrode 150 according to the surface light source device 100 of the present embodiment, light source body 110 has the inner space of injecting discharge gas in it, and electrode 150 provides voltage for discharge gas.At this, the example of discharge gas comprises mercury vapour, argon gas, neon and xenon etc.
Light source body 110 is partition wall-cut apart types.Therefore, light source body 110 comprises first substrate 111 and second substrate 112 that is arranged on first substrate, 111 tops.Between the marginal portion of first substrate 111 and second substrate 112, insert seal member 130 to limit the inner space.Partition wall 120 is arranged in the inner space the inner space is divided into discharge space 140.
Electrode 150 comprises first electrode 152 and second electrode 154 that is formed on second substrate, 112 upper surfaces that is formed on first substrate, 111 lower surfaces below.First electrode 152 and second electrode 154 are arranged in the marginal portion of first substrate 111 and second substrate 112 with the second direction that is substantially perpendicular to first direction.Electrode 150 can comprise conductive strips (tape) or metal powder, for example copper (Cu), nickel (Ni), silver (Ag), gold (Au), aluminium (Al), chromium (Cr) etc.
Each discharge space 140 is split into the non-luminous region 144 that is coated with electrode 150 and the light-emitting zone 142 of coated electrode 150 not.As mentioned above, because electrode 150 is set at the marginal portion of first substrate 111 and second substrate 112, so non-luminous region 114 is corresponding to two rim spaces of discharge space 140.Light-emitting zone 142 is corresponding to the center section of discharge space except two marginal portions.That is, light-emitting zone 142 and non-luminous region 144 can change according to the position of electrode 150.
Extension, space 114 upwards forms from the upper surface of second substrate 112.The extension, space 114 of the present embodiment has semicircular cross-section.Alternatively, extension, space 114 can have square-section, trapezoid cross section, triangular-section or the like.Extension, space 114 has basically the width identical with electrode 150.Therefore, extension, space 114 forms at the edge of second substrate, 112 upper surfaces corresponding to non-luminous region 114.
Therefore, light-emitting zone 142 has first width W 1 and first height H 1.Non-luminous region 144 has second width W 2 of being wider than the first width W l and second height H 2 that is higher than first height H 1.The height that second height H 2 of non-luminous region 144 is higher than first height H 1 of light-emitting zone 142 is the height that protrude from second substrate 112 extension, space 114.
Each partition wall 120 comprises first partition wall portions 122 in the light-emitting zone 142, and second partition wall portions, 124, the second partition wall portions 124 in the non-luminous region 144 have the width that is narrower than first partition wall portions 122.In described preferred embodiment, the composition surface between first partition wall portions 122 and second partition wall portions 124 is vertical with described first direction basically.Alternatively, described composition surface can be a conical in shape.When the composition surface had conical in shape, the width of second partition wall portions 124 was reduced gradually by the width of first partition wall portions 122.
As mentioned above, because second height H 2 that has of non-luminous region 144 and second width W 2 be greater than first height H 1 and first width W 1 of light-emitting zone 142, so non-luminous region 144 has second sectional area greater than first sectional area of light-emitting zone 142.Thus, the amount of the discharge gas that distributes in non-luminous region 144 is greater than the amount of the discharge gas that is distributed in traditional surface light source device non-luminous region of (described surface light source device comprises non-luminous region and the light-emitting zone that sectional area equates substantially).As a result, can produce more electronic secondary in the non-luminous region 144, thereby make electrode 150 can no longer play the effect of the details in a play not acted out on stage, but told through dialogues of surface light source device 100.In addition, can reduce the reduction of mercury gas in the non-luminous region 144, thereby make surface light source device 100 can have long life span.
In the present embodiment, non-luminous region 144 has greater than the height of light-emitting zone 142 and width, and non-luminous region 144 has second sectional area greater than first sectional area of light-emitting zone 142 thus.Alternatively, non-luminous region 144 can have the height of first height H 1 that is substantially equal to light-emitting zone 142, and greater than second width W 2 of first width W 1 of light-emitting zone 142.In addition, non-luminous region 144 can have the width of first width W 1 that is substantially equal to light-emitting zone 142, and greater than second height H 2 of first height H 1 of light-emitting zone 142.
Because second electrode 154 is 114 formation along the extension, space, therefore second electrode 154 has the bowed shape corresponding to extension, space 114 shapes.On the contrary, first electrode 152 has flat shape.
At this, outermost discharge space is only by seal member 130 and external isolation in the discharge space 140.Therefore, between outermost discharge space and outside heat interchange can take place, the discharge gas in the outermost discharge space cools off soon than the discharge gas in other discharge spaces 140 thus.Therefore, the luminescence efficiency of outermost discharge space will be lower than other discharge spaces 140.Specifically, when the outermost discharge space has relatively large sectional area, the outermost discharge space will have lower luminescence efficiency.
In order to address the above problem, be extended with auxiliary electrode part 156 from the two ends of first electrode 152 and second electrode 154, it is arranged on outermost non-luminous region 146 tops with first direction.Auxiliary electrode part 156 is applied to the voltage on the discharge gas in the outermost non-luminous region 146 and is higher than voltage on the discharge gas that is applied in the non-luminous region 144.Therefore, outermost non-luminous region 146 can have the luminescence efficiency of raising.
In addition, auxiliary space extension 116 upwards forms at the two ends of the outermost non-luminous region 146 of the qualification of second substrate 112.The height of auxiliary space extension 116 is higher than the height of extension, space 114.Therefore, the 3rd sectional area that outermost discharge space had is greater than second sectional area of the middle non-luminous region in the non-luminous region 144, and the amount of the discharge gas that distributes in the outermost non-luminous region 146 is greater than the amount of discharge gas in the middle non-luminous region thus.As a result, the brightness of outermost non-luminous region 146 is substantially similar in appearance to the brightness of middle non-luminous region.
In first substrate 111, be formed with reflection layer 170.Reflection layer 170 will reflect to second substrate 112 towards the light of first substrate 111.On reflection layer 170, be formed with first fluorescence coating 161.Below second substrate 112, be formed with second fluorescence coating 162.
Embodiment 2
Fig. 5 is the stereographic map of describing according to the surface light source device of second exemplary of the present invention, and Fig. 6 is the cut-open view that obtains along VIa-VIb line among Fig. 5, and Fig. 7 is the cut-open view that obtains along VIIa-VIIb line among Fig. 5.
Except the position of extension, space, the surface light source device 100a of the present embodiment comprise with embodiment 1 in the essentially identical element of surface light source device.Therefore, identical reference number is represented components identical, and omits further specifying for similar elements at this.
With reference to Fig. 5 to Fig. 7, extension, space 113 forms downwards with first direction at the two ends of first substrate 111.Extension, space 113 is arranged on the two ends of first substrate 111 corresponding to the non-luminous region 144a of discharge space 140, and non-luminous region 144a has the sectional area greater than light-emitting zone 142 thus.Because extension, space 113 is arranged at non-luminous region 144a, so non-luminous region 144a has bigger height and width with respect to light-emitting zone 142.Alternatively, non-luminous region 144a can have with light-emitting zone 142 essentially identical width and greater than the height of light-emitting zone 142.
In addition, auxiliary space extension 115 forms downwards with second direction at the two ends that first substrate 111 defines outermost non-luminous region 146a.Therefore, outermost discharge space 146a has the sectional area greater than middle non-luminous region.
The electrode 150a that is used to limit non-luminous region 144a comprises the first electrode 152a that is formed on first substrate, 111 belows, and is formed on the second electrode 154a in second substrate 112.Because extension, space 113 forms in first substrate 111, therefore the first electrode 152a has the corresponding bowed shape of shape of extension, space 113.On the contrary, the second electrode 154a has flat shape.
At this, in embodiment 1 and 2, the extension, space is arranged on in first substrate 111 and second substrate 112 any one.Extension, space 113 can be arranged in first substrate 111 and second substrate 112 alternatively simultaneously.
Embodiment 3
Fig. 8 is the stereographic map of describing according to the surface light source device of the 3rd exemplary of the present invention, Fig. 9 is the cut-open view that obtains along IXa-IXb line among Fig. 8, Figure 10 is the cut-open view that obtains along Xa-Xb line among Fig. 8, and Figure 11 describes the planimetric map that partition wall portions is arranged in first substrate.
With reference to Fig. 8 to Figure 11, comprise light source body 210 and electrode 250 according to the surface light source device 200 of the present embodiment, light source body 210 has the discharge space that injects discharge gas in it, and electrode 250 applies voltage for discharge gas.
Each discharge space 240 is split into the non-luminous region 244 that is coated with electrode 250 and the light-emitting zone 242 of coated electrode 250 not.Auxiliary electrode part 256 is extended from the two ends of first electrode 252 and second electrode 254 with first direction, and is arranged on outermost non-luminous region 244 tops.
Extension, space 214 upwards forms from the two ends of the upper surface of second substrate 212.Extension, space 214 has and electrode 250 essentially identical width.
Therefore, light-emitting zone 242 has the 3rd width W 3 and the 3rd height H 3.Non-luminous region 244 has the 4th width W 4 of being wider than the 3rd width W 3 and the 4th height H 4 that is higher than the 3rd height H 3.Specifically, by reducing the 4th width W 4 that partition wall portions 220 in the non-luminous region 244 forms non-luminous region 244.Therefore, each partition wall 220 comprises first partition wall portions 222 in the light-emitting zone 242, and second partition wall portions, 224, the second partition wall portions 224 in the non-luminous region 244 have the width that is narrower than first partition wall portions 222.
In addition, auxiliary space extension 216 upwards forms at the two ends that second substrate 212 limits outermost non-luminous region 246.The height of auxiliary space extension 216 is greater than the height of extension, space 214.
Alternatively, non-luminous region 244 can have the height of the 3rd height H 3 that is substantially equal to light-emitting zone 242, and greater than the 4th width W 4 of the 3rd width W 3 of light-emitting zone 242.In addition, the width of non-luminous region 244 can be substantially equal to the 3rd width W 3 of light-emitting zone 242, and its 4th height H 4 is greater than the 3rd height H 3 of light-emitting zone 242.
In first substrate 211, be formed with reflection layer 270.On reflection layer 270, be formed with first fluorescence coating 261.Below second substrate 212, be formed with second fluorescence coating 262.
Embodiment 4
Figure 12 is the stereographic map of describing according to the surface light source device of the 4th exemplary of the present invention, and Figure 13 is the cut-open view that obtains along XIIIa-XIIIb line among Figure 12, and Figure 14 is the cut-open view that obtains along XIVa-XIVb line among Figure 12.
Except the position of extension, space, the surface light source device 200a of the present embodiment comprise with embodiment 3 in surface light source device 200 essentially identical elements.Therefore, identical reference number is represented components identical, and omits further specifying for similar elements at this.
With reference to Figure 12 to Figure 14, extension, space 213 forms downwards with first direction at the two ends of first substrate 211.Because extension, space 213 is arranged at non-luminous region 244a, so non-luminous region 244a has bigger height and width with respect to light-emitting zone 242.Alternatively, non-luminous region 244a can have with light-emitting zone 242 essentially identical width and greater than the height of light-emitting zone 242.In addition, auxiliary space extension 215 forms downwards on second direction at two ends that first substrate 211 limits outermost non-luminous region 246a.
The electrode 250a that is used to limit non-luminous region 244a comprises the first electrode 252a that is formed on first substrate, 211 belows, and is formed on the second electrode 254a in second substrate 212.
At this, in embodiment 3 and 4, the extension, space is arranged on in first substrate 211 and second substrate 212 any one.Alternatively, the extension, space can be arranged in first substrate 211 and second substrate 212 simultaneously.
Electrode of the present invention is not limited to the surface light source device in the embodiment.Electrode of the present invention can be used for having the surface light source device of different shape.
Embodiment 5
Figure 15 is the planimetric map of describing according to the surface light source device of the 5th exemplary of the present invention.
Except the shape of discharge space, the surface light source device 100b of the present embodiment comprise with embodiment 1 in surface light source device 100 essentially identical elements.Therefore, identical reference number is represented components identical, and omits further specifying for similar elements at this.
With reference to Figure 15, the surface light source device 100b of the present embodiment comprises the central partition wall 126 that is used to limit middle discharge space 146, and the outermost partition wall 120b that is used to limit outermost discharge space 140b.
Each central partition wall 126 has essentially identical width.Therefore, each has essentially identical width by the middle discharge space 146 that central partition wall 126 limits.As a result, the middle non-luminous region of light-emitting zone in the middle of light-emitting zone and width equaled substantially in the middle of discharge space 146 comprised in the middle of each.
On the contrary, each outermost partition wall 120b comprises the first partition wall portions 122b among the outermost light-emitting zone 142b, and the second partition wall portions 124b among the outermost non-luminous region 144b, the second partition wall portions 124b has the width that is narrower than the first partition wall portions 122b.
That is to say that the extension, space is arranged on two outermost end of second substrate.Specifically, the extension, space in the embodiment 1 is arranged on the two ends of second substrate.On the contrary, the extension, space of the present embodiment is not arranged on two intermediate ends of second substrate, but only is arranged on two outermost end of second substrate.In addition, the extension, space is formed at the inside surface of seal member 130 and the outside surface of the second partition wall portions 124b.Therefore, middle discharge space 146 does not have the extension, space.Have only outermost discharge space 140b to have the extension, space.
Therefore, discharge space 146 has light-emitting zone and non-luminous region in the middle of each, and non-luminous region has the essentially identical width with light-emitting zone.On the contrary, has the outermost non-luminous region 144b that each outermost discharge space 140b of extension, space comprises the outermost light-emitting zone 142b with first width W 1 and has second width W 2 of being wider than first width W 1.Alternatively, outermost non-luminous region 144b can have second height of first height that is higher than outermost light-emitting zone 142b.
At this, partition wall-the cut apart surface light source device 100b of type has been described exemplarily in the present embodiment.Alternatively, surface light source device 100b can be corresponding to partition wall-integrated curriculum types.In addition, the said structure in a plurality of embodiments can be used in the extension, space of the present embodiment.
Embodiment 6
Figure 16 is the planimetric map of describing according to the surface light source device of the 6th exemplary of the present invention.
Except the shape of outermost discharge space, the surface light source device 100c of the present embodiment comprise with embodiment 5 in the essentially identical element of surface light source device 100b.Therefore, identical reference number is represented components identical, and omits further specifying for similar elements at this.
With reference to Figure 16, each the outermost partition wall 120c of surface light source device 100c in the present embodiment comprises the first partition wall portions 122c among the outermost light-emitting zone 142c, and the second partition wall portions 124c among the outermost non-luminous region 144c, the width of the second partition wall portions 124c is less than the width of the first partition wall portions 122b.
The extension, space of the present embodiment is not arranged to the inside surface of seal member 130.The extension, space only is arranged to the outside surface of the second partition wall portions 124c.Therefore, each outermost discharge space 140c comprises the outermost light-emitting zone 142c with first width W 1, and has the outermost non-luminous region 144c greater than second width W 3 of first width W 1.Alternatively, outermost non-luminous region 144c have second highly can be higher than outermost light-emitting zone 142c first the height.
At this, partition wall-the cut apart surface light source device 100c of type has been described exemplarily in the present embodiment.Alternatively, surface light source device 100c can be corresponding to partition wall-integrated curriculum types.In addition, the said structure in a plurality of embodiments can be used in the extension, space of the present embodiment.
Embodiment 7
Figure 17 is the exploded perspective view of describing according to the back light unit of the 7th embodiment of the present invention.
With reference to Figure 17, comprise surface light source device 200, upper casing 1100 and lower casing 1200, optical sheet 900 and transducer (inverter) 1300 among Fig. 8 according to the back light unit 1000 of the present embodiment.
Surface light source device 200 was described in detail with reference to Fig. 8.Therefore, all that omitted surface light source device 200 further describe.In addition, also can in back light unit 1000, adopt according to described other surface light source device of other embodiments.
Lower casing 1200 comprises the bottom surface 1210 that is used to admit surface light source device 200, and the side 1220 that 1210 edge extends out from the bottom surface.Like this, in drain pan 1200, formed the admittance space that is used to admit surface light source device 200.
Transducer 1300 be arranged on drain pan 1200 below.Transducer 1300 produces the sparking voltage that is used for drive surfaces light source device 200.Be applied to the electrode 250 of surface light source device 200 by first cable 1352 and second cable 1354 from the sparking voltage of transducer 1300 generations.
Optical sheet 900 comprises and is used for diffusion of light sheet (not shown) that diffusion equably sends from surface light source device 200 and the prismatic lens (not shown) that is used for providing orthodromic (straightforwardness) to the light of above-mentioned diffusion disk diffusion.
Upper casing 1100 combines with stayed surface light source device 200 and optical sheet 900 with drain pan 1200.Upper casing 1100 prevents that surface light source device 200 from separating with drain pan 1200.
In addition, the LCD plate (not shown) that is used for display image can be set to the top of upper casing 1100.
According to the present invention, because the cause of the extension, space of light source body, non-luminous region has the sectional area greater than light-emitting zone.Therefore, the amount that is distributed in the discharge gas in the non-luminous region is greater than the amount that is distributed in the discharge gas in the light-emitting zone, thereby will produce a large amount of relatively electronic secondarys in non-luminous region.Like this, can improve the luminescence efficiency in the non-luminous region, thereby make electrode no longer play the effect of details in a play not acted out on stage, but told through dialogues, and can make surface light source device have long life span.
After having described exemplary embodiment and its beneficial effect of the present invention, should be noted that, under the situation that does not deviate from the spirit and scope of the present invention that are defined by the following claims, can carry out various variations, replacement and change at this.
Claims (22)
1. surface light source device comprises:
The light source body has a plurality of discharge spaces that wherein are injected with discharge gas, and each described discharge space is divided into the light-emitting zone with first sectional area, and the non-luminous region with second sectional area, and described second sectional area is greater than described first sectional area; And
Electrode is arranged at described light source body, is used for described discharge gas is applied voltage.
2. surface light source device as claimed in claim 1, wherein said non-luminous region have than the big width of described light-emitting zone width.
3. surface light source device as claimed in claim 1, wherein said non-luminous region have than the big height of described light-emitting zone height.
4. surface light source device as claimed in claim 1, wherein said non-luminous region have than the width of described light-emitting zone and highly big width and height.
5. surface light source device as claimed in claim 1, wherein said electrode forms in two outer end portion of described light source body.
6. surface light source device as claimed in claim 5 wherein extends auxiliary electrode from the both ends of described electrode.
7. surface light source device as claimed in claim 1, outermost non-luminous region has the 3rd sectional area greater than described second sectional area in the wherein said non-luminous region.
8. surface light source device as claimed in claim 1, wherein, described light source body comprises:
First substrate;
Second substrate is arranged on described first substrate top, and has the extension, space, and extension, described space makes described non-luminous region have described second sectional area;
Seal member is inserted between described first and second substrates with the inner space of qualification with external isolation; And
Partition wall, it is arranged in the described inner space along the direction that is basically perpendicular to described electrode, to limit described discharge space.
9. surface light source device as claimed in claim 8, wherein each described partition wall comprises:
Be positioned at first partition wall portions of described light-emitting zone; And
Be positioned at second partition wall portions of described non-luminous region, described second partition wall portions has than the little width of the described first divider wall parts partial width, so that described non-luminous region has the width greater than described light-emitting zone.
10. surface light source device as claimed in claim 8, wherein, the part with auxiliary space extension outermost discharge space from the described discharge space of the qualification of described second substrate of the sectional area bigger than extension, described space sectional area is extended.
11. surface light source device as claimed in claim 1, wherein said light source body comprises:
First substrate has the extension, space, and extension, described space makes described non-luminous region have described second sectional area;
Second substrate is arranged on described first substrate top;
Seal member is inserted between described first substrate and described second substrate, with the inner space of qualification with external isolation; And
Partition wall, it is arranged in the described inner space along the direction that is basically perpendicular to described electrode, to limit described discharge space.
12. surface light source device as claimed in claim 11, the part that wherein has the outermost discharge space of auxiliary space extension from the described discharge space of the qualification of described first substrate of the sectional area bigger than extension, described space sectional area is extended.
13. surface light source device as claimed in claim 1, wherein, described light source body comprises:
First substrate; And
Second substrate, be arranged on described first substrate top, and it is integrally formed with partition wall, described partition wall is arranged along the direction that is basically perpendicular to described electrode, to limit described discharge space, described second substrate has the extension, space, and extension, described space makes described non-luminous region have described second sectional area.
14. surface light source device as claimed in claim 13, wherein each described partition wall portions comprises:
Be positioned at first partition wall portions of described light-emitting zone; And
Be positioned at second partition wall portions of described non-luminous region, described second partition wall portions has than the little width of the described first divider wall parts partial width, so that described non-luminous region has than the big width of described light-emitting zone width.
15. surface light source device as claimed in claim 13, wherein, the part with auxiliary space extension outermost discharge space from the described discharge space of the qualification of described second substrate of the sectional area bigger than extension, described space sectional area is extended.
16. surface light source device as claimed in claim 1, wherein said light source body comprises:
First substrate has the extension, space, so that described non-luminous region has described second sectional area; And
Second substrate is arranged on described first substrate top, and integrally formed with partition wall, and described partition wall is arranged along the direction that is basically perpendicular to described electrode, to limit described discharge space.
17. surface light source device as claimed in claim 16, wherein, the part with auxiliary space extension outermost discharge space from the described discharge space of the qualification of described first substrate of the sectional area bigger than extension, described space sectional area is extended.
18. a surface light source device comprises:
The light source body, have to middle discharge space that wherein injects discharge gas and outermost discharge space, light-emitting zone and middle non-luminous region in the middle of discharge space was divided in the middle of each was described, the width of non-luminous region is substantially equal to the width of described middle light-emitting zone in the middle of described, each described outermost discharge space is divided into the outermost light-emitting zone with first sectional area and has the outermost non-luminous region of second sectional area, and described second sectional area is greater than described first sectional area; And
Electrode is arranged at described light source body, is used for described discharge gas is applied voltage.
19. surface light source device as claimed in claim 18, wherein, described light source body comprises:
First substrate;
Second substrate is arranged on described first substrate top;
Seal member is inserted between described first substrate and described second substrate with the inner space of qualification with external isolation; And
Partition wall is arranged in the described inner space along the direction that is basically perpendicular to described electrode, with limit described in the middle of discharge space and described outermost discharge space,
Wherein, the extension, space that is used for limiting described outermost non-luminous region is formed at the outside surface of the outermost partition wall of described partition wall.
20. surface light source device as claimed in claim 19, extension, wherein said space is formed on the inside surface of described seal member.
21. surface light source device as claimed in claim 19, wherein said partition wall and described second substrate are integrally formed.
22. a back light unit comprises:
Surface light source device, comprise the light source body, described light source body has to a plurality of discharge spaces that wherein inject discharge gas, and be arranged at described light source body, be used for described discharge gas is applied the electrode of voltage, each described discharge space is divided into the light-emitting zone with first sectional area, and the non-luminous region with second sectional area, described second sectional area is greater than described first sectional area;
Be used to hold the shell of described surface light source device;
Be inserted into the optical sheet between described surface light source device and the described shell; And
Be used for the described electrode of described surface light source device is applied the transducer of sparking voltage.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040096821 | 2004-11-24 | ||
| KR20040096821 | 2004-11-24 | ||
| KR1020050089802 | 2005-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1779529A true CN1779529A (en) | 2006-05-31 |
Family
ID=36769907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005101233620A Pending CN1779529A (en) | 2004-11-24 | 2005-11-23 | Surface light source device and backlight unit having the same |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100596907B1 (en) |
| CN (1) | CN1779529A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101064235B (en) * | 2006-04-25 | 2010-06-02 | 乙全科技股份有限公司 | Flat fluorescent lamp |
-
2005
- 2005-09-27 KR KR1020050089802A patent/KR100596907B1/en not_active IP Right Cessation
- 2005-11-23 CN CNA2005101233620A patent/CN1779529A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101064235B (en) * | 2006-04-25 | 2010-06-02 | 乙全科技股份有限公司 | Flat fluorescent lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100596907B1 (en) | 2006-07-04 |
| KR20060057998A (en) | 2006-05-29 |
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