CN101666462A - Edge-lighting backlight module and light guide element and linear light source thereof - Google Patents
Edge-lighting backlight module and light guide element and linear light source thereof Download PDFInfo
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Abstract
The invention provides an edge-lighting backlight module and a light guide element and a linear light source thereof. The edge-lighting backlight module comprises at least one point light source, thelight guide element and a flat light guide plate, wherein the light guide element comprises a plurality of microstructures to destroy the total reflection of light in the light guide element and makethe light uniformly transmit out of the light guide element; and the spacial distribution of the plurality of microstructures depends on the light distribution of the at least one point light source on the light guide element, so the at least one point light source is converted into a linear light source with uniform emergent light. Therefore, the flat light guide plate can reflect the light of the linear light source to form an area source with uniform emergent light. The edge-lighting backlight module can reduce the number of parts and strengthen heat dissipation, and can avoid the conditions of non-uniform brightness.
Description
Technical field
The present invention relates to a kind of backlight module, especially a kind of side light type back light module, and light-guide device and line source thereof.
Background technology
Along with the progress of electronics technology, the accompanied electronic product is in vogue especially in daily life, increases day by day for the demand of the display compact, that power consumption is low.Wherein, LCD (Liquid CystalDisplay, LCD), advantage such as caloric value few, in light weight and non-radiation type low with its power consumption, often be used in modernized information equipments such as notebook computer, mobile phone, personal digital assistant, and little by little replace traditional cathode-ray tube display (Cold Cathode Tube Display, CRTDisplay).
Because liquid crystal itself does not possess the characteristics of luminescence, need it to provide backlight module to realize Presentation Function.Traditional backlight module comprises light source and LGP, the light incident of the relative LGP of light source and being provided with, and the transmission direction that light-guide plate guides is sent light beam from light source converts light source or spot light to area source and penetrates.
General at present cathode fluorescent tube (the Cold Cathode Fluorescent Lamp that adopts; CCFL) or light emitting diode (Light Emitting Device; LED) as light source, wherein, though the emitting brightness of cathode fluorescent tube has good display effect, there is following defective in it: the relative mid portion of two ends luminosity of cathode fluorescent tube is low, causes the backlight module bright dipping inhomogeneous; Cathode fluorescent tube must high pressure and by the AC power supply, be a unfavourable defect like this for portable display, and exchange of information can influence and disturb the image information of LCD; Cathode fluorescent tube is that cylinder is luminous, and the efficiency of light energy utilization is low; The life-span of cathode fluorescent tube can be subjected to temperature effect and significantly reduce; In addition, use the LCD relative cost of cathode fluorescent tube higher.
For overcoming the defective of cathode fluorescent tube, prior art adopts light emitting diode or other spot light to be combined into linear light sorurce with lamp guide, specifically can be referring to No. the 99103941st, the Chinese patent on September 13rd, No. 507099 1 announced of the TaiWan, China patent of TaiWan, China patent bulletin on October 21st, No. 534326 1 of bulletin on May 21st, 2003.Yet above-mentioned prior art has lamp guide and the spot light coupling efficiency is not high, the complicated and not high shortcoming of the luminous uniformity of lamp guide design.
Serve as to use LED Light bar PCB soft board to make with the light-emitting diode (LED) backlight module light source framework of the notebook computer of volume production on the market at present, its assembling mode is to utilize heat-conducting glue to paste on metal backing, dwindle thinning with light guide plate by single size of light emitting diode, produce the slimming backlight module, it is to utilize light emitting diode arranged in a straight line directly to form line source that its light transmits framework, reenter and inject among the LGP, to form area source.
Yet the use amount of light emitting diode is big in this kind backlight module, thereby improves the damage parts rate, and utilizes light emitting diode arranged in a straight line so that a plurality of spot lights are directly changed into linear light source, is easy to generate optical anomaly.In addition, this kind LED heat radiating arranged in a straight line is difficult for, and the assembling difficulty.
U.S. Pat 6655825 proposes a kind of liquid crystal display backlight module with white light source, it produces white light source with first optical fiber with ruddiness, green glow, blue light, and white light source is passed to second optical fiber of LCD, wherein the white light source that produced of first optical fiber can be passed to LCD at a distance, this white light source is by coupled fiber ruddiness, green glow, blue light to be produced white light source, forms backlight module operation framework.
U.S. Pat 7168841 proposes a kind of backlight module with arbitrary source, it comprises a light-source generation device, and loses element, a light mixing device and a planar light-source generation device, wherein light-source generation device comprises one or more light-emitting components, receive the light that this light-source generation device produces by losing element again, and light is outwards launched.Above-mentioned light mixing device is lost the light that element is launched in order to preliminary mixing, makes it produce a blend light source substantially, and the flat light source generation device comprises an astigmatic portion in order to receive the blend light source, to produce a planar light source.
The backlight module that TaiWan, China patent 200510877 proposes, it comprises LGP and at least one linear light sorurce, this linear light sorurce comprise spot light, transmission spot light luminous bundle light-conductive optic fibre and seize the transparent body of LGP optical fiber on both sides by the arms, this transparent body is provided with perturbed structure with the coupling light-conductive optic fibre, is converted into planar light from the light beam of linear light sorurce through LGP and penetrates.
The backlight module that TaiWan, China patent 200521570 proposes, it comprises LGP and at least one light supply apparatus, this light supply apparatus comprises a plurality of spot lights, will these a plurality of spot light issued lights be coupled to the fiber coupling device of a plurality of exit end outgoing, is converted to planar light from the light of light supply apparatus through LGP and penetrates.
TaiWan, China patent 200741314 proposes a kind of liquid crystal indicator, and it comprises a backlight module and a display panels.Above-mentioned backlight module comprises one first light source, one first lighting cavity, at least one first optical fiber and one first LGP.First lighting cavity has one first opening, and first light source is placed in first lighting cavity.One end of first optical fiber is linked to first opening.First LGP is arranged at the first optical fiber other end.Display panels is adjacent to a side of first LGP.
TaiWan, China patent 200730905 proposes light source (LED/ Halogen lamp LED/bulb) via electronics and frame for movement transmission, control, be delivered to the surface of position that designs (parallel linear, circular, rule or irregular curve moulding) by special fiber again, send required light by optical fiber end points or side, spread out of via transparent glass sheet (plate), acryl sheet (plate), with pattern, the literal of being carved on transparent glass sheet (plate), the acryl sheet (plate), present, reach illumination and the effect of decorating.
Make a general survey of above-mentioned patent, have still mostly that element is various, a complex structure, not good, the brightness irregularities problems such as (Light Mura) of radiating efficiency.
Summary of the invention
In view of the problem that exists in the above-mentioned background of invention, in order to meet the demand on the industry, the invention provides a kind of side light type back light module can be in order to solve the purpose that above-mentioned traditional side light type back light module fails to realize, improve above-mentioned many disadvantages, the number of spare parts by reducing backlight module is to increase product reliability and by the side of light heat source dislocation backlight module is produced with the situation that increases the radiating management convenience, more can significantly reduce brightness irregularities.。
A purpose of the present invention is to provide a kind of side light type back light module.This side light type back light module comprise at least one spot light, a light-guide device, with a flat light guide plate, wherein light-guide device comprises a plurality of micro-structurals, to destroy the total reflection of light in light-guide device, make light transmit light-guide device, and the spatial distribution of a plurality of micro-structurals is determined by the light distribution of spot light on light-guide device, light source is converted to an emitting uniform line source.Subsequently, above-mentioned flat light guide plate gets final product the light of reflected ray light source, to form an emitting uniform area source.
The present invention also provides a kind of side light type back light module, comprises: at least one spot light; One light-guide device, comprise a plurality of micro-structurals that form by injection molding, electrochemical discharge processing, Laser Processing or glass die cast mode, to destroy the total reflection of light in this light-guide device, make light transmit this light-guide device, the spatial distribution that wherein said a plurality of micro-structural is formed at this light-guide device is determined by the light distribution of described at least one spot light on this light-guide device, to convert described at least one spot light to an emitting uniform line source; And a flat light guide plate, convert this line source to an area source.
The invention provides a kind of light-guide device of side light type back light module, comprise a plurality of micro-structurals, to destroy the total reflection of light in this light-guide device, make light transmit this light-guide device, the spatial distribution of wherein said a plurality of micro-structurals is determined by the light distribution of at least one spot light on this light-guide device of this backlight module, to convert described at least one spot light to an emitting uniform line source.
The present invention also provides a kind of light-guide device of side light type back light module, comprise a plurality of micro-structurals that form by injection molding, electrochemical discharge processing, Laser Processing or glass die cast mode, the spatial distribution that wherein said a plurality of micro-structural is formed at this light-guide device is determined by the light distribution of at least one spot light on this light-guide device of this backlight module, to destroy the total reflection of light in this light-guide device that described at least one spot light is sent, make light transmit this light-guide device equably, to form a line source.
The invention provides a kind of line source, comprise: at least one spot light; An and light-guide device, comprise a plurality of micro-structurals, to destroy the total reflection of light in this light-guide device, make light transmit this light-guide device equably, the spatial distribution of wherein said a plurality of micro-structurals is determined by the light distribution of described at least one spot light on this light-guide device.
The present invention also provides a kind of line source, comprises: at least one spot light; An and light-guide device, comprise a plurality of micro-structurals that form by injection molding, electrochemical discharge processing, Laser Processing or glass die cast mode, to destroy the total reflection of light in this light-guide device, make light transmit this light-guide device equably, the spatial distribution that wherein said a plurality of micro-structurals are formed at this light-guide device is determined by the light distribution of described at least one spot light on this light-guide device.
Above-mentioned light-guide device can be optical fiber, glass, the polymethyl methacrylate (Polymethylmethacrylate of straight line column; PMMA) or Merlon (Polycarbonate; PC), and in order to make above-mentioned line source bright dipping even, the area of each micro-structural and the light distribution on the light-guide device are inversely proportional to, or the Density Distribution of mutually the same micro-structural and the light distribution on the light-guide device are inversely proportional to, so that light can transmit light-guide device equably.
Useful technique effect of the present invention is, the backlight module that the present invention proposes only needs light-guide device and a spot of spot light simple in structure to realize easily, significantly reduce the use amount of light emitting diode in the traditional backlight module with this, reduce the damage parts rate, increase the radiating management convenience, the situation that more can significantly reduce brightness irregularities produces.
Description of drawings
Fig. 1 is the structural representation of the light-guide device of a backlight module;
Fig. 2 A is the geometry schematic diagram of the light-guide device of a backlight module;
Fig. 2 B, Fig. 2 C, Fig. 2 D and Fig. 4 are the spatial distribution schematic diagram of micro-structural;
Fig. 3 A, Fig. 3 B, Fig. 3 C and Fig. 3 D are the geometry schematic diagram of micro-structural;
Fig. 5 is the structural representation of a line source;
Fig. 6 A, Fig. 6 B and Fig. 6 C are the structural representation of a side light type back light module;
Fig. 6 D is the profile of a backlight module; And
Fig. 7 is the thermal source distribution map of a LCD.
Wherein, description of reference numerals is as follows:
100 backlight modules, 110 light-guide devices
114 micro-structurals, 120～122 spot lights
130 flat light guide plate, 140 blooming pieces
150～156 line sources, 160 backboards
162 reflector plate bracing frames, 164 reflector plates
170 times diffusion sheets
The specific embodiment
The present invention is a kind of side light type back light module in this direction of inquiring into.In order to understand the present invention up hill and dale, detailed step and composition thereof will be proposed in following description.Apparently, execution of the present invention is not defined in the specific details that the technical staff was familiar with in side light type back light module field.On the other hand, well-known composition or step are not described in the details, with the restriction of avoiding causing the present invention unnecessary.Preferred embodiment meeting of the present invention is described in detail as follows, yet except these were described in detail, the present invention can also implement in other embodiments widely, and scope of the present invention do not limited, and it is as the criterion with the scope that appending claims was defined.
The present invention proposes a kind of side light type back light module, it comprises two light emitting diodes, an optical fiber and a flat light guide plate, wherein above-mentioned two light emitting diodes are disposed at the two ends of optical fiber respectively, and be distributed with a plurality of micro-structurals on the optical fiber, with the total reflection of the light that destroys light emitting diode incident at inside of optical fibre, make the light transmissive go out optical fiber, to form an emitting uniform line source.Moreover this optical fiber is disposed at a side of flat light guide plate, and when optical fiber transmitted light equably, flat light guide plate can reflect light equably, to reach the required uniform area light source function of LCD.
Above-mentioned a plurality of micro-structurals can be and protrude from optical fiber surface or depression and advance the semicircle of inside of optical fibre, V-arrangement, polyhedral cone or geometry such as irregular, and can pass through injection molding (Injection-Molding), electrochemical discharge is processed (Electro Chemical Discharge Machining; ECDM), Laser Processing (Laser Beam Machining; LBM), glass die cast (glass molded) or sandblast processing modes such as (sand blasting) is formed at the top layer or the surface of optical fiber.
Yet in order to make above-mentioned optical fiber transmitted ray equably, the spatial distribution of a plurality of micro-structurals on optical fiber must be relevant in the light distribution of inside of optical fibre with light emitting diode.For example, when each micro-structural each other during structure identical (that is shape, size, curved surface radian are all identical), a plurality of micro-structurals can be inversely proportional to the light distribution of light emitting diode on optical fiber in the Density Distribution on the optical fiber, that is in optical fiber, apart from light emitting diode part far away more, the light that is shone will be weak more, therefore needs by improving the density of micro-structural, the probability of transmitted ray is increased, to keep the uniformity of optical fiber transmitted ray.
Except said circumstances, also can reach the emitting uniform purpose by the micro-structural of different area.In like manner, because the fiber area far away more apart from light emitting diode, the light that is shone is weak more, therefore can to promote the efficient of transmitted ray, make optical fiber still can keep bright dipping even by increasing the area of micro-structural herein.
Yet above-mentioned backlight module is not limited to use two light emitting diodes, also can only use a light emitting diode, and the corresponding micro-structural spatial distribution of arranging in pairs or groups again still can form the emitting uniform line source.In like manner, above-mentioned backlight module is not limited to only use a formed line source of optical fiber, and also configurable four optical fiber are around flat light guide plate, to strengthen the brightness of LCD.Moreover the backlight module that the present invention proposes except using optical fiber, also can pass through glass, polymethyl methacrylate (Polymethylmethacrylate; PMMA) or Merlon (Polycarbonate; PC) made straight line column is realized identical purpose.
Therefore, with reference to figure 1, the present invention proposes a kind of light-guide device 110 of backlight module, comprise a plurality of micro-structurals 114, to destroy the total reflection of light in light-guide device 110, make light transmit light-guide device 110, the spatial distribution of wherein a plurality of micro-structurals 114 determines according at least one spot light 120 light distribution on light-guide device 110 of backlight module, to convert at least one spot light 120 to an emitting uniform line source.
Above-mentioned light-guide device 110 can be terminal shape light-guide device always, and the cross section of light-guide device 110 can be circle, triangle, rectangle, trapezoidal, rhombus or polygon, shown in Fig. 2 A.In addition, above-mentioned light-guide device 110 also can be by the made solid or open column shape structure of glass, polymethyl methacrylate or Merlon except can be an optical fiber.
A plurality of micro-structurals 114 can be distributed in the light output surface of light-guide device 110 as shown in Figure 1, to destroy the total reflection of light in light-guide device 110 inside, make light directly transmit light-guide device 110.Or shown in Fig. 2 B, a plurality of micro-structurals 114 also can be distributed in the reflecting surface of light-guide device 110, to change the reflection path of light, make light transmit the light output surface of light-guide device 110.With reference to figure 2C, a plurality of micro-structurals 114 also can be distributed in the side surface of light-guide device 110 again, to change the reflection path of side direction light, make light transmit light output surface.Certainly, shown in Fig. 2 D, the light output surface of light-guide device 110, reflecting surface or the side surface above-mentioned a plurality of micro-structurals 114 that all can distribute simultaneously are to promote the light extraction efficiency of light-guide device 110.
Yet, the optics purpose (transmission, reflection) that is distributed in a plurality of micro-structurals 114 of diverse location in the light-guide device 110 is neither identical, for example, the a plurality of micro-structurals 114 that are positioned at light-guide device 110 light output surfaces are in order to direct transmitted ray, and the purpose that is positioned at a plurality of micro-structurals 114 of light-guide device 110 reflecting surfaces and side surface is a reflection ray.Therefore, shown in figure 3A, a plurality of micro-structurals 114 can outwards be protruded from the surface of light-guide device 110.Or shown in Fig. 3 B, a plurality of micro-structurals 114 also can cave inward from the surface of light-guide device 110.Above-mentioned a plurality of micro-structurals 114 also can be the regular shapes or irregularly shaped such as polyhedral cone shown in the V-arrangement shown in Fig. 3 C, Fig. 3 D, to meet its optics purpose except can the semi-circular structure shown in Fig. 3 A and Fig. 3 B.In order to form a plurality of micro-structurals 114 of above-mentioned different shape on the light guide structure 110 of unlike material, a plurality of micro-structurals 114 can be passed through injection molding, electrochemical discharge processing, Laser Processing, glass die cast or sandblast processing mode and form.
Yet in order to make above-mentioned light-guide device 110 transmitted ray equably, the spatial distribution of a plurality of micro-structurals on light-guide device 110 must be relevant in the light distribution of light-guide device 110 inside with spot light 120.For example, when each micro-structural 114 each other during structure identical (that is shape, size, curved surface radian are all identical), a plurality of micro-structurals 114 can be inversely proportional to the light distribution of spot light 120 on light-guide device 110 in the Density Distribution on the light-guide device 110, that is in light-guide device 110, the part that range points light source 120 is far away more, the light that is shone will be weak more, therefore need by improving the density of a plurality of micro-structurals 114, the probability of transmitted ray is increased, to keep the uniformity of light-guide device 110 transmitted rays, as shown in Figure 1.
Except said circumstances, also can reach the emitting uniform purpose by the micro-structural 114 of different area.In like manner, because range points light source 120 light-guide device 110 zones far away more, the light that is shone is weak more, therefore can to promote the efficient of transmitted ray, make light-guide device 110 still can keep bright dipping even, as shown in Figure 4 by increasing the area of micro-structural 114 herein.
Please refer to Fig. 5, the present invention also proposes a kind of line source 150, wherein this line source 150 comprises above-mentioned at least one spot light 120 and light-guide device 110, and above-mentioned a plurality of micro-structurals 114 are distributed on the light-guide device 110 unevenly, with the total reflection of light in light-guide device 110 that breakdown point light source 120 is sent, make light transmit light-guide device 110 equably.This line source 150 also can comprise another spot light 122 to be disposed at the other end of light-guide device 110, and with the luminous intensity that goes out of line feeder light source 150, and above-mentioned spot light 120,122 all can be light emitting diode.
Moreover, shown in figure 6A, the invention allows for a side light type back light module 100.This backlight module 100 comprises an above-mentioned line source 150 and a flat light guide plate 130, wherein line source 150 is configurable in a side of flat light guide plate 130, and by the light reflection of flat light guide plate 130, so that line source 150 conversions are formed an area source with line source 150.
In order to promote the luminous intensity of area source, backlight module 100 also can comprise two line sources 150,152 altogether to be disposed at the relative both sides of flat light guide plate 130 respectively, shown in Fig. 6 B.Or shown in Fig. 6 C, backlight module 100 also can comprise altogether four line sources 150,152,154,156 be disposed at respectively flat light guide plate 130 around, increase the display brightness of backlight module with this.
With reference to figure 6D, it is the profile of a side light type back light module 100.This side light type back light module 100 also comprises an existing blooming piece 140, one backboard (back bezel) 160, one reflector plate bracing frame (reflector holder) 162, one reflector plate 164, blooming piece 140 can comprise: diffusion sheet on (up diffuser) 166, one rhombus lens (BEF) 168 and diffusion sheet (down diffuser) 170 once, wherein light source is light emitting diode (LED), light destroys the physical mechanism of total reflection by a plurality of micro-structurals in the light-guide device 110 of straight line column 114, to transmit light-guide device 110, and via flat light guide plate 130 leaded lights and a reflector plate 164 reflections, to provide a backlight module 100 uniform surface light source, be applied to the backlight liquid crystal display module.
According to above-mentioned, the backlight module that the present invention proposes only needs light-guide device and a spot of spot light simple in structure to realize easily, significantly reduce the use amount of light emitting diode in the traditional backlight module with this, reduce the damage parts rate, also spot light can be concentrated on the corner on an end, two ends or four limits of LCD, utilize to combine with the system architecture metal parts, the configuration of the heat abstractor of being more convenient for also simultaneously can promote heat dissipation, as shown in Figure 7.Moreover the straight line column light guide structure that the present invention proposes can form the emitting uniform line source being incident to flat light guide plate, and forms the bright dipping uniform surface light source and produce with the situation of avoiding brightness irregularities, to improve the display quality of LCD.
Apparently, according to the description among the top embodiment, the present invention has many corrections and difference.Therefore need be understood in the scope of its additional claim, except above-mentioned detailed description, the present invention can also implement widely in other embodiments.Above-mentioned is preferred embodiment of the present invention only, is not in order to limit scope of the present invention; All other do not break away from the equivalence finished under the disclosed spirit and changes or modify, and all should be included in the scope that appending claims defines.
Claims (10)
1. the light-guide device of a side light type back light module, comprise a plurality of micro-structurals, to destroy the total reflection of light in this light-guide device, make light transmit this light-guide device, the spatial distribution of wherein said a plurality of micro-structurals is determined by the light distribution of at least one spot light on this light-guide device of this backlight module, to convert described at least one spot light to an emitting uniform line source.
2. the light-guide device of side light type back light module according to claim 1, wherein above-mentioned light-guide device is terminal shape light-guide device always, and the cross section of this light-guide device can be circle, triangle, rectangle, trapezoidal, rhombus or polygon, wherein this light-guide device can be made by optical fiber, glass, polymethyl methacrylate or Merlon, and described a plurality of micro-structural can be semicircle, V-arrangement, polyhedral cone or irregularly shaped, and outwards protrude on the surface of this light-guide device certainly, or the surface of this light-guide device caves inward certainly.
3. the light-guide device of a side light type back light module, comprise a plurality of micro-structurals that form by injection molding, electrochemical discharge processing, Laser Processing or glass die cast mode, the spatial distribution that wherein said a plurality of micro-structural is formed at this light-guide device is determined by the light distribution of at least one spot light on this light-guide device of this backlight module, to destroy the total reflection of light in this light-guide device that described at least one spot light is sent, make light transmit this light-guide device equably, to form a line source.
4. the light-guide device of side light type back light module according to claim 3, wherein said at least one spot light is plural spot light, described spot light is configured in the two ends of this light-guide device, and described spot light is a light emitting diode, wherein the light distribution on the area of each micro-structural and this light-guide device is inversely proportional to, or the light distribution on the density of described a plurality of micro-structural spatial distributions and this light-guide device is inversely proportional to, and structure is identical each other for wherein said a plurality of micro-structurals.
5. line source comprises:
At least one spot light; And
One light-guide device, comprise a plurality of micro-structurals, to destroy the total reflection of light in this light-guide device, make light transmit this light-guide device equably, the spatial distribution of wherein said a plurality of micro-structurals is determined by the light distribution of described at least one spot light on this light-guide device.
6. line source comprises:
At least one spot light; And
One light-guide device, comprise a plurality of micro-structurals that form by injection molding, electrochemical discharge processing, Laser Processing or glass die cast mode, to destroy the total reflection of light in this light-guide device, make light transmit this light-guide device equably, the spatial distribution that wherein said a plurality of micro-structurals are formed at this light-guide device is determined by the light distribution of described at least one spot light on this light-guide device.
7. side light type back light module comprises:
At least one spot light;
One light-guide device, comprise a plurality of micro-structurals, to destroy the total reflection of light in this light-guide device, make light transmit this light-guide device, the spatial distribution of wherein said a plurality of micro-structurals is determined by the light distribution of described at least one spot light on this light-guide device, to convert described at least one spot light to an emitting uniform line source; And
One flat light guide plate converts this line source to an area source.
8. side light type back light module according to claim 7, wherein said at least one spot light is plural spot light, described spot light is configured in the two ends of this light-guide device, and described spot light is a light emitting diode, wherein the light distribution on the area of each micro-structural and this light-guide device is inversely proportional to, or the light distribution on the density of described a plurality of micro-structural spatial distributions and this light-guide device is inversely proportional to, and structure is identical each other for wherein said a plurality of micro-structurals.
9. side light type back light module comprises:
At least one spot light;
One light-guide device, comprise a plurality of micro-structurals that form by injection molding, electrochemical discharge processing, Laser Processing or glass die cast mode, to destroy the total reflection of light in this light-guide device, make light transmit this light-guide device, the spatial distribution that wherein said a plurality of micro-structural is formed at this light-guide device is determined by the light distribution of described at least one spot light on this light-guide device, to convert described at least one spot light to an emitting uniform line source; And
One flat light guide plate converts this line source to an area source.
10. side light type back light module according to claim 9, wherein above-mentioned light-guide device is terminal shape light-guide device always, and the cross section of this light-guide device can be circle, triangle, rectangle, trapezoidal, rhombus or polygon, it is made that wherein this light-guide device can be optical fiber, glass, polymethyl methacrylate or Merlon, and described a plurality of micro-structural can be semicircle, V-arrangement, polyhedral cone or irregularly shaped, and outwards protrude on the surface of this light-guide device certainly, or the surface of this light-guide device caves inward certainly.
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Cited By (36)
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| CN101922634A (en) * | 2010-07-22 | 2010-12-22 | 鸿富锦精密工业（深圳）有限公司 | LED (Light Emitting Diode) illumination device |
| CN101922632A (en) * | 2010-07-22 | 2010-12-22 | 鸿富锦精密工业（深圳）有限公司 | LED lighting device |
| CN101922633A (en) * | 2010-07-22 | 2010-12-22 | 鸿富锦精密工业（深圳）有限公司 | LED illumination device |
| CN102155685A (en) * | 2011-02-18 | 2011-08-17 | 深圳市华星光电技术有限公司 | Backlight module |
| CN102444833A (en) * | 2010-10-08 | 2012-05-09 | 联胜（中国）科技有限公司 | Illumination device |
| CN102466168A (en) * | 2010-10-29 | 2012-05-23 | 京东方科技集团股份有限公司 | Line light source and LCD (liquid crystal display) device |
| CN102588845A (en) * | 2012-03-07 | 2012-07-18 | 苏州大学 | Back lighting device and liquid crystal display device |
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