TW201044067A - Backlight module and liquid crystal display - Google Patents

Backlight module and liquid crystal display Download PDF

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Publication number
TW201044067A
TW201044067A TW98118035A TW98118035A TW201044067A TW 201044067 A TW201044067 A TW 201044067A TW 98118035 A TW98118035 A TW 98118035A TW 98118035 A TW98118035 A TW 98118035A TW 201044067 A TW201044067 A TW 201044067A
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TW
Taiwan
Prior art keywords
light
emitting diodes
light emitting
wave
backlight module
Prior art date
Application number
TW98118035A
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Chinese (zh)
Inventor
Jia-Jhang Kuo
Original Assignee
Chi Mei Optoelectronics Corp
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Priority to TW98118035A priority Critical patent/TW201044067A/en
Publication of TW201044067A publication Critical patent/TW201044067A/en

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Abstract

A backlight module including a light emitting diode (LED) module, a light guide plate, and a wavelength transfer element is provided. The LED module includes a substrate and a plurality of light emitting diodes, wherein the light emitting diodes are disposed on the substrate. The light guide plate having a light entering surface is disposed by the LED module. The light entering surface faces forward to the light emitting diodes. The wavelength transfer element is disposed between the light guide plate and the LED module. The wavelength transfer element has a plurality of troughs, and the troughs lid on the light emitting diodes respectively.

Description

>〇Z 1TW 26697twf.doc/n 201044067 VI. Description of the Invention: [Technical Field of the Invention] In particular, the present invention relates to a liquid crystal display crystal display and a backlight module thereof. [Prior Art]

O 〇 The liquid crystal display has superior properties such as high enamel quality, good space utilization efficiency, and no radiation. In the $ s - flat power of the eight-eighths in the LCD display panel

The liquid helium knife itself has no illuminating properties. I usually need to provide a backlight module. By the brightness of the backlight template foot f, the liquid crystal display can display the picture: the surface backlight module can be used according to the position of the light source and the cold cathode light tube used in the side human light backlight module light module contains mercury. , not only ===," under the time of use, mercury I makes Μ ^ only do not pay for the demand of Na, and long switch cold _ fluorescent lamp f also 'people's dry 疋 light intensity for a long time, and Do not use more than the use of fast response (address group, ? good, Zhao Ji small, low power consumption, (low = two); color production and process is suitable for mass production guilty

Emitting D shouts _ as a schematic diagram of the light-emitting diodes t-light module. If the package base is in the shape of a cup, the light emitted by the polar body 110 and the light-emitting body: 110 will be limited by the light exit angle of the 3 201044067 26697twf.doc/n cup-shaped package base. The light plate 120 has a spray-like bright grain which is easily seen by the naked eye. In addition, heat is generated when the light-emitting diode 110 emits light, and heat generated when the light-emitting diode 110 emits light easily causes the light guide plate 12 disposed beside the light-emitting diode 11 to be deformed by heat. The overall optical performance of the backlight module. FIG. 1B is a conventional side-lit backlight module - _ - ", / w I /, - - - - / 1, Q, I back | As shown in Figure 1B, in order to improve the backlight module 1 Alternatively, another method of optical imaging is to implant a plurality of light-converting particles 114 in the encapsulating layer 112 of the light-emitting diode 11'. These filaments 114, (4) filaments, and the glare powder emits light after being irradiated by the light emitted from the wafer 116 of the light-receiving diode 11G, thereby converting the wavelength of light emitted from the light-emitting diode nG. Then, the light guide plate 12 is disposed outside the light-emitting diode 11A, and is outside. However, the calendered powder will generate heat after being subjected to the wafer enthalpy, and the heat is likely to accumulate in the luminescent diode to dissipate, and as the temperature rises, the wafer 116 exhibits a reduced J-light efficiency, and further Affecting the overall optics of the backlight module (10) = ##, when the optical performance of the first 杈 group 1〇0, 110 is poor, the display quality of the liquid crystal display of the optical module 100, 110 is also: ^ 'Making product reliability is not easily trusted by consumers. [Summary of the Invention] ^ Ming provides - secret good forest table _ backlight cylinder. The present invention provides a liquid crystal display with good display quality. The invention comprises a moonlight module comprising a light emitting diode unit, a light guide plate and a light wave conversion element. The light emitting diode unit includes a substrate and a plurality of light emitting diodes, wherein the light emitting diodes are disposed on the substrate. The light guide plate is disposed beside the light emitting diode unit, has a light incident surface, and the light incident surface faces the light emitting diode. The light wave conversion element is disposed between the light guide plate and the light emitting diode unit, wherein the light wave conversion element has a plurality of grooves, and the groove corresponds to the cover light emitting diode. In an embodiment of the invention, the light emitting diode is a blue light emitting photodiode, and the light wave converting component is made of yellow light fluorescent powder. In an embodiment of the invention, the light-emitting diode is an ultraviolet light-emitting diode, and the material of the light-wave converting component comprises a red-emitting phosphor, a green-emitting phosphor, and a blue-emitting phosphor. In an embodiment of the present invention, the substrate is at least divided into a first region and a first region, and the LED includes at least a plurality of first LEDs and a plurality of first LEDs. And the first light emitting diode is located in the first region, and the first light emitting diode is located in the second region. In a consistent embodiment of the present invention, the optical wave conversion element includes at least one first lightwave conversion component and at least one second lightwave conversion component ′, and the first lightwave conversion component corresponds to the first light-emitting diode of the first region. The second light wave conversion element is configured to correspond to the second light emitting diode configuration of the second region, and the chromaticities of the first light wave conversion element and the second light wave conversion element are different. In a poor embodiment of the present invention, the first light wave conversion element and the second light wave conversion element have different chromaticities including components. In the first embodiment of the present invention, the gamut of the light-wave converting element and the light-wave converting element of the present invention are different in density. In an embodiment of the present invention, the backlight module further includes at least one fixing member disposed on the light incident surface of the light guide plate, and the fixing member forms an accommodation space with the light guide, and the lightwave conversion component is accommodated. In the space. In an embodiment of the invention, the fixing member is a cassette. In an embodiment of the invention, the backlight module further includes an adhesive layer disposed between the light guide plate and the lightwave conversion element. In an embodiment of the invention, the material of the adhesive layer comprises an optical glue having a transmittance of 1.5. In one embodiment of the present invention, the backlight module further includes a light box, and the light emitting diode unit, the light guide plate, and the light wave conversion element are all disposed in the light box. The invention further provides a liquid crystal display comprising a liquid crystal display panel = and a backlight module. The backlight module is disposed under the liquid crystal display panel, wherein the backlight module comprises a light emitting diode unit, a light guide plate and two light wave conversion elements. The light emitting diode unit includes a substrate and a plurality of emitters 2=poles, wherein the light emitting diodes are placed on the substrate. The light guide plate is disposed adjacent to the hair=diode unit and has a human-light surface, and the human light surface is disposed between the light guide plate and the light-emitting diode unit toward the light-emitting two-limb light-wave conversion element, wherein the light-wave conversion element has a plurality of The groove, and the groove corresponds to the cover light diode. In one embodiment of the invention, the light-emitting diode is a blue light-emitting diode, and the light-wave converting element is made of yellow light phosphor. In an embodiment of the invention, the light-emitting diode is ultraviolet light dOZITW 26697twf.doc/n 201044067=diode' and the material of the lightwave conversion component comprises green fluorescent powder and blue light fluorescent powder. π忠九杨 In the present invention, the substrate is divided into a brother-zone, and the light-emitting diode includes at least a plurality of [light-emitting ==:: light-emitting diodes, and the first light-emitting a diode; in the first region, the first photo-pole is located in the second region. ❹ Ο 小一^ In the present invention, the above-mentioned level conversion element includes a λ ϋ ϋ wave conversion element and at least a second light wave conversion element, and the ΐ ΐ conversion 70 pieces correspond to the first illuminating part of the first area The polar body configuration is different, and the second light-emitting diode-light-wave converting element and the second light-wave converting element of the second region are different in chromaticity. In an embodiment of the invention, the first light-wave converting element of the above-described first light-wave converting element has different chromaticities including components. In the second embodiment, the chromaticity of the first-wavelength conversion element and the first-wave conversion element described above are different in concentration. In the embodiment, the backlight module further includes at least a person in the form of a board, and the fixing member and the light guide plate 4 are disposed in two, and the light wave conversion element is accommodated in the accommodating space. In the embodiment of the invention, the fixing member is a click bar. In the embodiment of the invention, the backlight module further includes an adhesive layer disposed between the light panel and the lightwave conversion element. The firing rate is ascertained—in the embodiment, the material of the adhesive layer described above includes an optical adhesive having a folding handle of 1.5. In an embodiment of the present invention, the backlight module further includes a light box under the liquid crystal display panel, and the light emitting diodes and the light wave conversion elements are disposed in the light box. 70 '

In the embodiment of the present invention, the liquid crystal display panel has a _ display area and a non-display area located beside the display area, wherein the light board is located in the display area, and the light-emitting diode unit and the V of the knife are all located. A small part of the light guide plate and the light guide plate and the light wave conversion element = two, in the non-display area. ~ This ^ month is a kind of moonlight module, which includes a light-emitting diode, a light guide plate and a light wave conversion layer. The light-emitting diode is a single plate and a light-emitting diode, wherein the light-emitting diode is disposed in the United States: the plate is disposed beside the light-emitting diode unit, and the light guide plate is soiled. ¥光在几傲丹 has a smooth surface, the bean has a plurality of grooves on the light entrance surface, and the groove corresponds to the cover light. The wave conversion layer is disposed on the light incident surface of the light guide plate. In the embodiment of the invention, the above-mentioned light-emitting diode is a blue light-emitting diode, and the material of the light-wave-converting layer is yellow light-emitting powder. In an embodiment of the invention, the light-emitting diode is an ultraviolet light-emitting diode, and the material of the light-wave converting layer comprises a red-green phosphor and a blue-emitting phosphor. In an embodiment of the invention, the substrate is at least divided into a first region and a second region, and the light emitting diode comprises at least a plurality of second light emitting bodies and a plurality of second light emitting diodes. And the first light-emitting diode is in the first region and the second light-emitting diode is located in the second region. In an embodiment of the invention, the lightwave conversion layer comprises at least a first lightwave conversion layer and at least a second lightwave conversion layer, and the first light 201044067

The uZITW 26697twf.doc/n wave conversion layer corresponds to the first light emitting diode configuration of the first region, and the second light wave conversion layer corresponds to the second light emitting diode configuration of the second region, the first light wave conversion layer and the second light wave The chrominance of the conversion layer is different. In an embodiment of the invention, the first light wave conversion layer and the second light wave conversion layer have different chromaticities including components. In an embodiment of the invention, the first light wave conversion layer and the second light wave conversion layer have different chromaticities including different concentrations. In an embodiment of the invention, the backlight module further includes an adhesive layer disposed between the light guide plate and the lightwave conversion layer. In an embodiment of the invention, the material of the adhesive layer comprises an optical adhesive having a refractive index of 1.5. In one embodiment of the present invention, the backlight module further includes a light box, and the light emitting diode unit and the light guide plate are disposed in the light box. The present invention further provides a liquid crystal display comprising a liquid crystal display panel and a backlight module, wherein the backlight module is disposed under the liquid crystal display panel. The backlight module comprises a light emitting diode unit, a light guide plate and a light wave conversion layer. The light emitting diode unit includes a substrate and a light emitting diode, wherein the light emitting diode is disposed on the substrate. The light guide plate is disposed beside the light emitting diode unit, and the light guide plate has a light incident surface, wherein the light incident surface has a plurality of concave grooves, and the concave surface corresponds to the cover light emitting diode. The light conversion layer is disposed on the light incident surface of the light guide plate. In an embodiment of the invention, the light emitting diode is a blue light emitting body, and the light converting layer is made of yellow light fluorescent powder. In an embodiment of the invention, the above-mentioned light emitting diode is ultraviolet light 9 201044067 JL V / V» X A-/ (

2TW 26697iwf.doc/n Light-emitting diodes, and the material of the light-wave conversion layer includes red-emitting phosphor powder, green-light phosphor powder and blue-emitting phosphor powder. . In the embodiment of the present invention, the substrate is at least divided into a first region and a second region, and the light emitting diode includes at least a plurality of first light emitting diodes and a plurality of second light emitting diodes. And the first light emitting diode is located in the first region, and the second light emitting diode is located in the second region. In an embodiment of the invention, the lightwave conversion layer includes at least one first lightwave conversion layer and at least one second lightwave conversion layer, and the first lightwave conversion layer corresponds to the first light emitting diode configuration of the first region, And the second lightwave conversion layer corresponds to the second light emitting diode arrangement of the second region, and the first lightwave conversion layer and the second lightwave conversion layer have different chromaticities. In an embodiment of the invention, the chromaticity of the first light wave conversion layer and the second light wave conversion layer are different in composition. In an embodiment of the invention, the first lightwave conversion layer and the second lightwave conversion layer have different chromaticities including different concentrations. In an embodiment of the invention, the backlight module further includes an adhesive layer disposed between the light guide plate and the lightwave conversion layer. In an embodiment of the invention, the material of the adhesive layer comprises an optical adhesive having a refractive index of 1.5. In an embodiment of the invention, the backlight module further includes a light box under the liquid crystal display panel, and the light emitting diode units are disposed in the light box. In an embodiment of the present invention, the liquid crystal display panel has a display area and a non-display area located beside the display area, wherein the majority & guide 12 2〇1〇44067uzitw 26697t_ & board is located in the display area The inner light-emitting diode unit, the light wave conversion layer, the less than 4 = light panel, and the junction of the light guide plate and the light wave conversion layer are all located in the non-display area. In the light-emitting layer of the present invention, no light-converting particles are implanted in the encapsulating layer of the polar body, and a light-wave converting element made of phosphor powder is disposed between the light-emitting diode unit and the light guiding plate. A light wave conversion layer formed of a light-receiving powder is disposed on a person's light surface of the light plate. In this way, the light-emitting diode unit can be rotated-turned to enable the light-emitting diode unit to effectively dissipate heat to avoid deformation of the light guide plate. In addition, the groove covers the light-emitting diode ' while improving the overall optical performance of the light-emitting mode by the light-wave converting layer and the light-wave converting element to improve the light-emitting characteristics of the light-emitting body, thereby improving the liquid crystal display. Display quality. In order to make the above features and advantages of the present invention more comprehensible, the following detailed description is in accordance with the accompanying drawings. [Embodiment] 第一 [First Embodiment] Fig. 2 is a schematic view of a backlight module according to a first embodiment of the present invention. Please refer to FIG. 2 'the moonlight module 2' includes a light-emitting diode unit 21A, a guide wire 22GG, and a light wave conversion element. The light emitting diode unit includes a substrate 2110 and a plurality of light emitting diodes 212, wherein the light emitting diode 2120 is disposed on the substrate (10), and the light emitting body of the embodiment is a light emitting crystal m22 as a package. The rubber layer is packaged on a substrate (Chip On Board, COB). It is worth noting that in order to avoid the conventional 26697twf.doc/n 201044067

JL V / V_> The heat generated by the phosphor in the VI TW encapsulant after being excited by the light accumulates in the encapsulant layer, which in turn affects the optical performance and the service life of the luminescent wafer, so that the encapsulant layer 2124 of this embodiment is Fluorescent powder was not implanted. The light guide plate 2200 is disposed beside the light emitting diode unit 2100, and has a light incident surface 2210, wherein the light incident surface 2210 faces the light emitting diode unit 2100, and the light emitted by the light emitting chip 2122 of the light emitting diode unit 2100 is emitted from The light incident surface 2210 enters the light guide plate 2200. The light wave conversion element 23 is disposed between the light guide plate 2200 and the light emitting diode unit 2100. The light wave conversion element 2300 has a plurality of grooves 2310, and the grooves 2310 对应 correspond to the cover light emitting diodes 2120. The material of the lightwave conversion element 2300 is mainly a phosphor powder, and in order to enhance the intensity of the light wave conversion element 2300, when the light wave conversion element 2300 is formed, the fluorescent powder having a good concentration is added to the silicone or the epoxy. The resin (Epoxy) is post-formed. The phosphor used to form the lightwave converting element 2300 is selected in accordance with the properties of the light emitting diode 2120. For example, in order to emit white light, when the light-emitting diode 2120 is selected as the blue light-emitting diode, the material of the light-wave converting element 2300 is yellow light-emitting powder. When the blue light emitted by the blue light emitting diode is projected to the light wave converting element 2300 made of the yellow fluorescent powder, the yellow fluorescent powder is excited to emit yellow light, and is mixed with the blue light emitted by the light emitting diode 2120 into white light. . In another embodiment, the light-emitting diode 2120 is a UV light emitting diode, and the material of the light-wave converting component 2300 is selected from a red fluorescent powder, a green fluorescent powder, and a blue fluorescent light. Light powder. Similarly, the light emitted by the ultraviolet light emitting diode is projected to the light wave conversion element 2300 made of red light fluorescent powder, green fluorescent powder, and blue light fluorescent powder 12 1 ^OZlTW 26697twf.doc/n 201044067 light powder. When the light wave conversion element 2300 is excited by red, green, and blue light, the three kinds of light are mixed to emit white light. 〇❹ As described above, the recess 231 光 of the light-wave converting element 23 〇 corresponds to the cover light-emitting diode 2120, and the light emitted from the light-emitting diode 2120 is irradiated to the light-wave converting element 2300, and the light-wave converting element is excited. The phosphors in the 23 Å illuminate and illuminate each other to excite more different wavelengths of light. Compared with the conventional one, since no matter or object in the light wave conversion element 2300 restricts the traveling angle of the light, the light of the light-emitting diode unit 2100 can be converted into a relatively uniform surface light source by the light wave conversion element magic (8). . Therefore, compared with the conventional one, the light entering from the light-wave converting element 23 and entering the light-guiding plate 22 from the light-incident surface 2210 of the light guide plate 2200 has a large angle of entry angle, so that the conventional backlight module can be improved. The light guide plate has the disadvantage of jetting bright lines. In addition, the distance between the light-emitting diode 2120 and the light guide plate 2200 can be increased by the light-wave converting element 23, and the deformation of the light-emitting diode 22g can be avoided, thereby prolonging the use of the backlight. In view of the above, since the wavelength range of the light-emitting diode survey affects the overall optical performance of the back $: 20: and in order to make the backlight module 2_and the light=now', it usually limits the use of the backlight module. The wavelength range of the polar body (10) is different from that of the light-emitting diodes 2m_2 of the light-emitting diode 2m_122_t, and the wavelengths emitted by the light-emitting diodes of the earth and earth are not uniform. Therefore, in order to reduce the light-emitting wavelength range of 201044067 ru / υ i 〇wi-1TW 26697twf.doc/n one body 2120, the number of light-emitting diodes that can be selected on the same wafer is small, and the cost of the light-emitting diode 2120 Relative increase. In addition, 'the characteristics of the light-emitting diode 2120 and the light-wave converting element 23' can also provide a way to greatly save the manufacturing cost of the backlight module. 3A is a sound diagram of a light-emitting diode and a light wave conversion element, and FIG. 3B is a color diagram of the light-emitting diode of FIG. 3A and the corresponding light wave conversion element in a CIE 1931 chromaticity diagram. schematic diagram. Referring to FIG. 3A and FIG. 3B simultaneously, the backlight module 2000 can have a uniform chromaticity performance by the wavelength range of different illuminating wafers corresponding to different illuminating wavelength ranges of the luminescent powder. In detail, the substrate 2η〇 can be at least divided into a first region 2110a and a first region 2110b′, and the light emitting diode 2120 includes a plurality of first light emitting diodes 2120a and a plurality of second light emitting diodes 2120b, wherein The light-emitting wavelength range of the first light-emitting diode 2120a corresponds to A in FIG. 3B, and the light-emitting wavelength range of the second light-emitting diode 2120b corresponds to B' in FIG. 3B and the first light-emitting diode 2120a is correspondingly disposed on the first light-emitting diode 2120a. In the region 2110a, the second light-emitting diode 2120b is disposed in the first region 2110b. Correspondingly, the lightwave converting element 2300 includes at least a first lightwave converting component 2300a and a second lightwave converting component 2300b, wherein the concentration of the phosphor powder by forming the first lightwave converting component 2300a and the second lightwave converting component 23〇〇b Alternatively, the light transmitted through the first light wave conversion element 2300a and the second light wave conversion element 2300b may have different chromaticities. In the present embodiment, the wavelength of light transmitted through the first lightwave converting element 2300a is 14 OZ1TW 26697twf.doc/n 201044067 JL \JI \J dk is PI, and the wavelength of light transmitted through the second optical wave converting element 2300b is P2. The first light wave conversion element 2300a is disposed corresponding to the first light-emitting diode 2120a in the first region 2110a, and the second light wave conversion element 2300b is disposed corresponding to the second light-emitting diode 2120b in the first region 2110b. As shown in FIG. 3B, when the light emitted by the first light-emitting diode 2120a in the first region 2110a passes through the first light-wave converting element 2300a, the light L1 emitted from the first light-emitting diode 2120a will have A and P1 in the CIE 1931 chromaticity diagram of FIG. 3B. Chromatic performance on the line. It is worth noting that by adjusting the concentration component of the first lightwave converting element 2300a, the chromaticity of the light L1 can be expressed in the CIE 1931 chromaticity diagram as approaching A or approaching P1. When the light emitted by the second light-emitting diode 2120b in the first region 2110b passes through the second light-wave converting element 23〇〇b, the light L2′ emitted by the second light-emitting diode 2120b is connected to B and P2 in the chromaticity diagram of FIG. 3BiCIE 1931. Chromatic performance. Similarly, by adjusting the density component of the second lightwave converting element 2300b, the chromaticity of the light L2 can be expressed in the ciE 1931 chromaticity diagram as approaching B or approaching P2. As can be seen from the above, in order to achieve uniform chromaticity performance of the backlight module 2000, the components and concentrations of the phosphors forming the first lightwave conversion element 2300a and the second lightwave conversion element 23〇〇b can be selected first. The wavelength range of the corresponding first light-emitting diode 2120a and the second light-emitting diode 212〇b is selected by using the CIE 1931 chromaticity diagram. Alternatively, the first light-emitting diode 212〇a and the second light-emitting diode 21 may be selected first, and the first-wavelength conversion element 2300a and the second light-wave conversion element 23%% may be selected correspondingly. The composition and concentration of the fluorescent powder. In this way, not only the composition and concentration of the phosphor powder can be selected according to the wavelength range of the light-emitting diode 15 2010440671TW 26697twf.doc/n 2120, and the light-emitting diodes fabricated on the same wafer can be selected. The wavelength range is relatively large, so that the manufacturing cost of the backlight module 2000 can be effectively saved. Then, referring to FIG. 2, in order to fix the relative position between the lightwave conversion element 2300 and the light guide plate 2200 and the light emitting diode unit 21, the light wave conversion element 23 is clamped in this embodiment. 〇 fixed. In detail, the backlight module 2 further includes at least one fixing member 2400, and the fixing member 2400 is, for example, a cassette. The fixing member 2400 is disposed on the light incident surface 2210 of the light guide plate 2200, and the fixing member 2400 and the light guide plate 2200 form an accommodating space s, and the light wave conversion element 2300 is received in the accommodating space S. In another embodiment, which is not shown in the green, an adhesive layer (not shown) may be disposed between the light conversion element 2300 and the light guide plate 2200 to fix the light conversion element 2300 to the light guide plate 2200. In order to make the backlight module 2000 have a good light source utilization rate, the adhesive layer may be made of an optical adhesive having a refractive index of 1.5. In addition, the backlight module 2000 further includes a light box 2500, and the above-mentioned light emitting diode unit 21 〇〇, the light guide plate 2200, and the light wave conversion element 23 皆 are all disposed in the light box 2500. 4 is a cross-sectional green view of a liquid crystal display to which the backlight module described above is applied. Referring to FIG. 4, the backlight module 2000 is disposed under a liquid crystal display surface g 3000 and assembled into a liquid crystal display 4000. It should be noted that the liquid crystal display panel 3000 has a display area 3000a and a non-display area 3000b located beside the display area 3〇〇〇a, and most of the light guide plates 2200 are located in the display area 3〇〇〇a, and emit light. The diode unit 2100, the light wave conversion ^16 201044067 ... a "0Z1TW 26697twf.doc / n piece 2300, a small portion of the light guide plate 22 and the junction of the light guide plate 22 and the light wave conversion element 2300 are located in the non-display area Within 3000b. Corresponding to the junction of the light guide plate 2200 and the lightwave conversion component 2300 in the non-display area 3000b, the bonding of the light guide plate 2200 and the lightwave conversion component 23 can be prevented from affecting the overall optical performance of the backlight module 2000, so that the liquid crystal display 4000 has Good display quality. Of course, those skilled in the art, after considering the present specification, also consciously use the black matrix region of the liquid crystal display panel 3 to shield the light guide plate 2200 from the light conversion element 23. The joints are to avoid affecting the overall optical performance of the backlight module 2000 and to maintain good display quality of the liquid crystal display 4000. In order to improve the light source utilization of the backlight module 2000, and thereby improve the display quality of the liquid smear 4000, the liquid crystal display 4 further includes an optical film 3100. The optical film 3100 is disposed between the liquid crystal display panel 3A and the backlight module 2000, and may be a diffusion sheet, a prism sheet or a brightness enhancement sheet, which is selected according to the use requirements. [Second Embodiment] This embodiment is substantially the same as the first embodiment, and the same or similar element numbers denote the same or similar elements. The backlight module of the present embodiment is different from the backlight module of the first embodiment in that the components are different in structure, and the application and function of the components are substantially the same as those of the first embodiment. For the sake of simplicity, the details are not repeated here. FIG. 5 is a schematic diagram of a backlight module according to a second embodiment of the present invention. For example, the backlight module 5000 of the present embodiment includes a light-emitting diode unit 2100, a light guide plate 5200, and a light wave conversion layer 53A. The light-emitting diode unit 2100 is described in detail in the first embodiment and will not be described here. The light guide plate 5200 is disposed on the light emitting diode unit 21 邋. . There is a light-incident surface, and the light-incident surface is more than 5212, and these grooves 5212 correspond to the light-emitting diodes 2120 covering the light-emitting diode unit 21A. The light conversion layer 5300 is disposed on the light incident surface 5210 of the light guide plate 52, and is correspondingly filled in the recess 5212. The material of the lightwave conversion layer 5300 is also selected for the corresponding light-emitting chip 2122, and may be a general-purpose fluorescent powder or a red and green fluorescent powder. In addition, the backlight module 5000 further includes an adhesive layer 54 disposed between the light conversion layer 53A and the light incident surface 5210 of the light guide plate 5200, so that the light conversion layer 5300 can be firmly attached to the light guide plate 5200. The adhesive layer 5400 is an optical adhesive having a refractive index of 1.5. Different from the first embodiment, the light guide plate 2200 of the first embodiment has a complete shape and has a light wave of the groove 2310. The conversion element 2300 is a separately fabricated component. In the backlight module 5 of the embodiment, the light incident surface 5210 of the light guide plate 5200 has a recess 5212, and the light conversion layer 53 is disposed on the light incident surface. 5210 is correspondingly filled in the recess 5212. The optical wave conversion layer 5300 of the present embodiment has the same function as the optical wave conversion element 23 of the first embodiment. In summary, the backlight module of the present invention and the application thereof The liquid crystal display of the backlight module has the following advantages: 18 201044067 ru/UJ〇xr}〇ziTW 26697twf.doc/n -, no illuminating phosphor in the light-emitting diode flip-flop layer, can avoid the generation of glory powder Thermal effect of the light-emitting diode, thus illuminating The diode holds its good optical appearance and prolongs the use of the light-emitting diode. Second, f is set on the substrate by the light three (four) in (10) mode, so the angle of the light emitted by the light-emitting body is not limited. In addition, the addition of the concave σ and the 'light wave conversion element or the light wave conversion layer along the light-emitting body=profile distribution' to form a relatively uniform surface light source can improve the habit of: The disadvantage of jetting bright lines. The two H-wave conversion components or light (four) commutation increases the distance between the light-emitting diodes and the light, which avoids the reflection of the light-emitting diodes, thereby prolonging the backlight. The service life of the module. 4. The composition of the glory powder of the light-wave conversion component or the light-wave conversion layer makes the wavelength range of the light-emitting diode corresponding to the 4 mesh have a relatively narrow range. Therefore, the manufacturing cost of the backlight module can be saved. 0 i or ^, the wavelength range of the selected light-emitting diode, so that the composition of the phosphor powder forming the light wave conversion selective light-wave conversion layer and the wave degree have more choices, the two groups have good optical performance, thus improving the liquid crystal Display ^·ΐ ΐ°σσϊ 'In turn, consumers have a good impression of the product, and rely on the product to have reliability. Qualification = hair (four) exposes the above - but it is not used in the technical field of the general knowledge, in 19 201044067 ru , UJU 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1A is a schematic view of a conventional edge-lit backlight module. Figure 1B is a schematic view of another side-into-light backlight module. 2 is a schematic view of a backlight module according to a first embodiment of the present invention. 3A is a diagram showing the arrangement of the light-emitting diode and the light-wave converting element. FIG. 3B is a schematic diagram showing the chromaticity of the light-emitting diode of FIG. 3A and the corresponding light-wave converting element in the CIE 1931 chromaticity diagram. 4 is a cross-sectional view of a liquid crystal display to which the backlight module described above is applied. 0 is not tolerated. FIG. 5 is a schematic diagram of a backlight module according to a second embodiment of the present invention. [Main component symbol description] 100, 100', 2000, 5000: backlight module 110, 110', 2120: light emitting diode 112': encapsulant layer 114': light conversion particle 116': wafer 120, 2200, 5200 Light guide plate 2100: light emitting diode unit 201044067uzlTW 26697twf.doc/n 2110: substrate 2110a: first region 2110b: second region 2120a: first light emitting diode 2120b: second light emitting diode 2122: light emitting chip 2124 : encapsulation layer 2210, 5210: light incident surface 2300: light wave conversion element 2300a · first light wave conversion element 2300b: second light wave conversion element 2310, 5212: groove 2400: fixing member 2500: light box 3000: liquid crystal display panel 3000a : Display area 〇 3000b: · Non-display area 3100: Optical film 4000. Liquid crystal display 5300: Light wave conversion layer 5400: Adhesive layer 21

Claims (1)

  1. 201044067 1TW 26697twf.doc/n VII. Patent application scope: 1. A backlight module, comprising: a light emitting diode unit, comprising a substrate and a plurality of light emitting diodes, wherein the light emitting diodes are disposed in the a light guide plate disposed adjacent to the light emitting diode unit, having a light incident surface, wherein the light incident surface faces the light emitting diodes; and a light wave conversion element disposed on the light guide plate and the light emitting layer Between the diode units, wherein the light wave conversion element has a plurality of grooves, and the grooves correspond to cover the light emitting diodes. 2. The backlight module of claim 1, wherein the light emitting diodes are blue light emitting diodes, and the light wave converting component is made of yellow light working powder. 3. The backlight module of claim 1, wherein the light emitting diodes are ultraviolet light emitting diodes, and the material of the light wave converting component comprises red light fluorescent powder and green light fluorescent light. Light powder and blue light fluorescent powder. 4. The backlight module of claim 1, wherein the substrate is at least divided into a first region and a second region, and the light emitting diodes comprise at least a plurality of first light emitting diodes and a plurality of second light emitting diodes, wherein the first light emitting diodes are located in the first region, and the second light emitting diodes are located in the second region. 5. The backlight module of claim 4, wherein the lightwave conversion component comprises at least one first lightwave conversion component and at least one second lightwave conversion component, and the first lightwave conversion component corresponds to the first region The first light-emitting diodes are disposed, and the second light-wave converting elements are corresponding to the first light-emitting diodes of a region of 22 〇 023 TW 26697 twf.doc/n 201044067, and the first lightwave conversion The element has a different chromaticity than the second light wave conversion element. 6. The backlight module of claim 5, wherein the first light wave conversion element and the second light wave conversion element have different chromaticities, including different components. 7. The backlight module of claim 5, wherein the first optical wave conversion element and the second optical wave conversion element have different chromaticities. 8. The backlight module of claim 1, further comprising a fixing member disposed on the light incident surface of the light guide plate and forming an accommodation space with the light guide plate, wherein the light wave The conversion component is housed in the accommodating space. 9. The backlight module of claim 8, wherein the fixing member is a cassette. The backlight module of claim 1, further comprising an adhesive layer disposed between the light guide plate and the lightwave conversion element. 11. The backlight module of claim 10, wherein the adhesive layer is made of an optical adhesive having a refractive index of 15. 12. The backlight module of claim i, further comprising a light box, wherein the light emitting diode unit, the light guide plate and the light wave conversion element are disposed in the light box. A liquid crystal display comprising: a liquid crystal display panel; a backlight module disposed under the liquid crystal display panel, comprising: a light emitting body unit, including a substrate and a plurality of light emitting diodes 23 26697wf.doc/n 201044067 i \jt yj \j L i-/\ TW ^ pole body, wherein the light emitting diodes are disposed on the substrate; a light guide plate disposed beside the light emitting diode unit has a light incident surface, and The light-emitting surface faces the light-emitting diodes; and a light-wave converting element is disposed between the light-guiding plate and the light-emitting diode unit, wherein the light-wave converting element has a plurality of grooves, and the grooves correspond to Covering the light-emitting diodes. 14. The liquid crystal display according to claim 13, wherein the light emitting diodes are blue light emitting diodes, and the light wave converting element is made of yellow light fluorescent powder. 15. The liquid crystal display according to claim 13, wherein the light emitting diodes are ultraviolet light emitting diodes, and the material of the light wave converting component comprises red fluorescent powder and green fluorescent light. Powder and blue light fluorescent powder. 16. The liquid crystal display of claim 13, wherein the substrate is at least divided into a first region and a second region, and the light emitting diodes comprise at least a plurality of first light emitting diodes and a plurality of And a second light emitting diode, wherein the first light emitting diodes are located in the first region, and the second light emitting diodes are located in the second region. 17. The liquid crystal display of claim 16, wherein the lightwave conversion component comprises at least one first lightwave conversion component and at least one second lightwave conversion component, and the first lightwave conversion component corresponds to the first region The first light-emitting diodes are disposed, and the second light-wave converting elements are disposed corresponding to the second light-emitting diodes of the second region, and the first light-wave converting elements and the second light-wave converting elements have different chromaticities . 18. The liquid crystal display according to claim 17, wherein 24 〇〇201〇44〇67qzitw _/n := conversion element and chromaticity of the second optical wave conversion element, 19· as claimed in claim 17 The first-wavelength converting element and the second light have different concentrations. The chromaticity of the 70 pieces is different. 20. The sweat module of the thirteenth aspect of the patent application further includes at least one fixing member disposed on the guide==, ▲ back and form an accommodation with the light guide plate. Space, I breaks into the glossy surface, inside the accommodation space. The μ first wave conversion element accommodates the bell. 21· The δhai fixture described in the second paragraph of the patent application is a cassette. "Shoulder is not good, of which 22. If the patent application scope module includes - adhesive layer, configuration '曰 display, between the back parts., with the lead plate and the light wave conversion element 23 · as claimed in the 22nd The material of the material layer includes an optical yoke of refractive index of 15. L, wherein the read module % pole unit, the light guide is under the panel, and the light is turned into two. And the light wave conversion element (4) is arranged in the light box crystal display The liquid crystal region is located at the side of the display area - the non-display pole unit, the light wave conversion 'the light emitting portion, the portion of the light guide plate, and the guide 25 1TW 26697twf.doc/ n 201044067 ± \J ) \J X. I__* rj The junction of the light board and the lightwave conversion element is located in the non-display area. 26. A backlight module comprising: a light emitting diode unit including a substrate and a plurality of light emitting diodes, wherein the light emitting diodes are disposed on the substrate; a light guide plate disposed adjacent to the light emitting diode unit and having a light incident surface, wherein the light incident surface has a plurality of grooves And the grooves correspond to the cover The light-emitting diodes and the light-wave-converting layer are disposed on the light-incident surface of the light-guide plate. The backlight module of claim 26, wherein the light-emitting diodes are blue light-emitting The backlight module of the invention, wherein the light-emitting diode is an ultraviolet light-emitting diode, and the light-wave is used as the ultraviolet light-emitting diode. The material of the conversion layer includes a red-emitting luminescent powder, a green-emitting luminescent powder, and a blue-emitting luminescent powder. 29. The backlight module of claim 26, wherein the substrate is at least divided into a first And a second region, wherein the light emitting diodes comprise at least a plurality of first light emitting diodes and a plurality of second light emitting diodes, and the first light emitting diodes are located in the first region, and The second light emitting diode is located in the second area. The backlight module of claim 29, wherein the light wave conversion layer comprises at least one first light wave conversion layer and at least one second light wave conversion Layer, and the first lightwave conversion layer corresponds The first light-emitting diodes of the first region are disposed, and the second light-wave-converting layer is disposed corresponding to the second light-emitting diodes of the second region, the first light-wave converting layer and the second light wave 26 26697twf. Doc/n 201044067) The chromaticity of the 〇Z1XW conversion layer is different. The backlight module according to claim 30, wherein the chromaticity of the first light conversion layer and the second light conversion layer are different 32. The backlight module of claim 30, wherein the first light wave conversion layer and the second light wave conversion layer have different chromaticities including different concentrations. 33. The backlight module further includes an adhesive layer disposed between the light guide plate and the light conversion layer. The backlight module of claim 33, wherein the adhesive layer is made of an optical adhesive having a refractive index of 1.5. 35. The backlight module of claim 26, further comprising a light box, wherein the light emitting diode unit and the light guide plate are disposed in the light box. 36. A liquid crystal display, comprising: a liquid crystal display panel, a backlight module, disposed under the liquid crystal display panel, comprising: a light emitting diode unit, including a substrate and a plurality of light emitting diodes, The light-emitting diodes are disposed on the substrate; a light guide plate disposed adjacent to the light-emitting diode unit has a light-input surface, and the light-incident surface faces the light-emitting diodes, wherein the light-emitting diodes The light surface has a plurality of grooves, and the grooves correspond to the light-emitting diodes; and a light wave conversion layer is disposed on the light-incident surface of the light guide plate. 27 1TW 26697twf.doc/n 201044067 1 u / vy_? ui lj\-j ^ 37. The liquid crystal display of claim 36, wherein the light emitting diodes are blue light emitting diodes, and The material of the light conversion layer is yellow fluorescent powder. 38. The liquid crystal display of claim 36, wherein the light emitting diodes are ultraviolet light emitting diodes, and the material of the light wave converting layer comprises red light fluorescent powder and green light fluorescent light. Powder and blue light fluorescent powder. 39. The liquid crystal display of claim 36, wherein the substrate is at least divided into a first region and a second region, and the light emitting diodes comprise at least a plurality of first light emitting diodes and a plurality of And a second light emitting diode, wherein the first light emitting diodes are located in the first region, and the second light emitting diodes are located in the second region. The liquid crystal display of claim 39, wherein the lightwave conversion layer comprises at least one first lightwave conversion layer and at least one second lightwave conversion layer, and the first lightwave conversion layer corresponds to the first region The first light-emitting diodes are disposed, and the second light-wave converting layer is disposed corresponding to the second light-emitting diodes of the second region, and the first light-wave converting layer and the second light-wave converting layer have different chromaticities . The liquid crystal display of claim 40, wherein the first lightwave conversion layer and the second lightwave conversion layer have different chromaticities, including different components. 42. The liquid crystal display of claim 40, wherein: the first lightwave conversion layer and the second lightwave conversion layer have different chromaticities including different concentrations. 43. The liquid crystal display according to claim 36, wherein the backlight 28 .JZ1TW 26697 twf. doc/n module further comprises an adhesive layer disposed between the light guide plate and the light conversion layer. 44. The backlight module of claim 43, wherein the adhesive layer is made of an optical adhesive having a refractive index of 1.5. The liquid crystal display of claim 36, wherein the backlight module further comprises a light box under the liquid crystal display panel, and the light emitting diode unit and the light guide plate are disposed in the light box. 46. The liquid crystal display of claim 36, wherein the liquid crystal display panel has a display area and a non-display area adjacent to the display area, wherein a majority of the light guide plate is located in the display area, and the The light emitting diode unit, the light wave conversion layer, a small portion of the light guide plate, and a junction of the light guide plate and the light wave conversion layer are located in the non-display area. 29
TW98118035A 2009-06-01 2009-06-01 Backlight module and liquid crystal display TW201044067A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103062671A (en) * 2011-10-24 2013-04-24 鸿富锦精密工业(深圳)有限公司 Backlight module
CN103133950A (en) * 2012-11-13 2013-06-05 友达光电股份有限公司 Backlight module
TWI472850B (en) * 2012-05-08 2015-02-11 Au Optronics Corp Backlight module
TWI571677B (en) * 2011-07-20 2017-02-21 Lg伊諾特股份有限公司 Optical member and display device having the same
US9715055B2 (en) 2011-07-14 2017-07-25 Lg Innotek Co., Ltd. Display device and optical member
US9720159B2 (en) 2011-01-31 2017-08-01 Lg Innotek Co., Ltd. Optical member and display device including the same
US9766392B2 (en) 2011-07-14 2017-09-19 Lg Innotek Co., Ltd. Optical member, display device having the same and method of fabricating the same
US9766386B2 (en) 2011-07-18 2017-09-19 Lg Innotek Co., Ltd. Optical member and display device having the same
US9835785B2 (en) 2011-07-18 2017-12-05 Lg Innotek Co., Ltd. Optical member, display device having the same, and method of fabricating the same
US9851602B2 (en) 2011-07-18 2017-12-26 Lg Innotek Co., Ltd. Optical member and display device having the same
US10247871B2 (en) 2011-11-07 2019-04-02 Lg Innotek Co., Ltd. Optical sheet, display device and light emitting device having the same

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9720159B2 (en) 2011-01-31 2017-08-01 Lg Innotek Co., Ltd. Optical member and display device including the same
US9720160B2 (en) 2011-07-14 2017-08-01 Lg Innotek Co., Ltd. Display device and optical member
US9766392B2 (en) 2011-07-14 2017-09-19 Lg Innotek Co., Ltd. Optical member, display device having the same and method of fabricating the same
US9715055B2 (en) 2011-07-14 2017-07-25 Lg Innotek Co., Ltd. Display device and optical member
US9835785B2 (en) 2011-07-18 2017-12-05 Lg Innotek Co., Ltd. Optical member, display device having the same, and method of fabricating the same
US10054730B2 (en) 2011-07-18 2018-08-21 Lg Innotek Co., Ltd. Optical member, display device having the same, and method of fabricating the same
US9851602B2 (en) 2011-07-18 2017-12-26 Lg Innotek Co., Ltd. Optical member and display device having the same
US9766386B2 (en) 2011-07-18 2017-09-19 Lg Innotek Co., Ltd. Optical member and display device having the same
TWI571677B (en) * 2011-07-20 2017-02-21 Lg伊諾特股份有限公司 Optical member and display device having the same
US9829621B2 (en) 2011-07-20 2017-11-28 Lg Innotek Co., Ltd. Optical member and display device having the same
CN103062671A (en) * 2011-10-24 2013-04-24 鸿富锦精密工业(深圳)有限公司 Backlight module
US10247871B2 (en) 2011-11-07 2019-04-02 Lg Innotek Co., Ltd. Optical sheet, display device and light emitting device having the same
TWI472850B (en) * 2012-05-08 2015-02-11 Au Optronics Corp Backlight module
TWI464503B (en) * 2012-11-13 2014-12-11 Au Optronics Corp Backlight module
CN103133950A (en) * 2012-11-13 2013-06-05 友达光电股份有限公司 Backlight module

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