TWI407208B - Backlight module and liquid crystal display apparatus - Google Patents
Backlight module and liquid crystal display apparatus Download PDFInfo
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- TWI407208B TWI407208B TW99147356A TW99147356A TWI407208B TW I407208 B TWI407208 B TW I407208B TW 99147356 A TW99147356 A TW 99147356A TW 99147356 A TW99147356 A TW 99147356A TW I407208 B TWI407208 B TW I407208B
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Abstract
Description
本發明是關於一種面狀光源，尤其是關於一種應用於液晶顯示裝置的背光模組。 The present invention relates to a planar light source, and more particularly to a backlight module applied to a liquid crystal display device.
背光模組係將線狀或點狀光源產生的光線，藉由導光板轉換成為均勻的面狀發光，藉以作為液晶顯示器所需的平面光源。相較於早期的背光模組採用的冷陰極螢光燈管而言，發光二極體具有明顯的節能特性，且已具有足夠的亮度。因此，採用發光二極體作為光源的背光模組也日益增多。 The backlight module converts the light generated by the linear or point light source into a uniform planar light by the light guide plate, thereby serving as a planar light source required for the liquid crystal display. Compared with the cold cathode fluorescent lamp used in the early backlight module, the light emitting diode has obvious energy saving characteristics and has sufficient brightness. Therefore, backlight modules using light-emitting diodes as light sources are also increasing.
如第一圖所示，為一種習知背光模組100，其具有一設置在二導光板11之間的發光二極體12。發光二極體12側向地朝該等導光板11射入光線，且導光板11與其上方的擴散片13相隔一段預定距離，以在兩者之間形成一混光空間14，供光線均勻化之用。因此，發光二極體12發出之光線，在進入導光板11後並經由導光板11向上發射後，可在混光空間14內充分混光均勻後再進入擴散片13，使得擴散片13可均勻地向上發光。 As shown in the first figure, a conventional backlight module 100 has a light-emitting diode 12 disposed between two light guide plates 11. The light emitting diode 12 injects light into the light guide plate 11 laterally, and the light guide plate 11 is spaced apart from the diffusion sheet 13 above the predetermined distance to form a light mixing space 14 therebetween for uniformizing the light. Use. Therefore, after the light emitted from the light-emitting diode 12 enters the light guide plate 11 and is emitted upward through the light guide plate 11, the light can be uniformly mixed in the light mixing space 14 and then enter the diffusion sheet 13 so that the diffusion sheet 13 can be evenly distributed. The ground shines upwards.
然而，上述混光空間14的存在卻使得擴散片13無法進一步靠近導光板11，導致背光模組的厚度增加，並影響液晶顯示器的薄型化 。並且，隨著發光二極體可提供的最大發光亮度不斷提升，在相同尺寸的背光模組內採用高亮度發光二極體，可有效地減少發光二極體的所需數量，藉以降低製造成本且簡化製造步驟。但當第一圖中之發光二極體12採用較高亮度之發光二極體時，卻會導致發光二極體12與導光板11之間的間隙15，以及導光板11鄰近發光二極體12的部份區域，會有較高的光線密度，也因此會使得擴散片13在發光二極體12上方區域的亮度明顯較其他區域為高，無法達成均勻發光的要求。 However, the presence of the light mixing space 14 causes the diffusion sheet 13 to be closer to the light guide plate 11 , resulting in an increase in the thickness of the backlight module and affecting the thickness of the liquid crystal display. . Moreover, as the maximum luminance of the light-emitting diodes is continuously increased, high-brightness light-emitting diodes are used in the backlight module of the same size, which can effectively reduce the required number of light-emitting diodes, thereby reducing manufacturing costs. And simplify the manufacturing steps. However, when the light-emitting diode 12 in the first figure uses a light-emitting diode of higher brightness, the gap 15 between the light-emitting diode 12 and the light guide plate 11 is caused, and the light-guide plate 11 is adjacent to the light-emitting diode. A portion of the region 12 has a higher light density, and thus the brightness of the diffusion sheet 13 in the region above the LED 12 is significantly higher than in other regions, and the uniform illumination cannot be achieved.
因此，本發明之目的在於提供一種背光模組，可有效地解決上述問題，不僅可達成均勻發光的要求，並可有效減少背光模組的厚度。 Therefore, the object of the present invention is to provide a backlight module, which can effectively solve the above problems, can not only achieve the requirement of uniform illumination, and can effectively reduce the thickness of the backlight module.
此外，本發明之目的更在於提供一種具有上述背光模組之液晶顯示裝置。 Furthermore, it is an object of the present invention to provide a liquid crystal display device having the above backlight module.
為達上述目的，本發明之背光模組包含至少一導光板、至少一發光單元，以及一電路板。該導光板具有一主板體，以及至少一由該主板體之一側面向外突伸的延伸部。該發光單元鄰近該延伸部。該電路板與該發光單元電連接。 To achieve the above objective, the backlight module of the present invention comprises at least one light guide plate, at least one light emitting unit, and a circuit board. The light guide plate has a main body, and at least one extension protruding outward from a side of the main body. The lighting unit is adjacent to the extension. The circuit board is electrically connected to the light emitting unit.
此外，本發明更提供另一種背光模組，包含複數導光板、複數發光單元，以及一電路板。該等導光板彼此間隔地設置，各該導光板具有一主板體，以及至少一由該主板體向外突伸的延伸部，該等發光單元設置於該等導光板之間，並鄰近該等延伸部，該電路板與該等發光單元電連接。 In addition, the present invention further provides another backlight module, which comprises a plurality of light guide plates, a plurality of light emitting units, and a circuit board. The light guide plates are disposed at a distance from each other, and each of the light guide plates has a main body and at least one extending portion protruding outward from the main body. The light emitting units are disposed between the light guide plates and adjacent to the light guide plates. And an extension portion, the circuit board is electrically connected to the light emitting units.
此外，本發明之液晶顯示裝置包含一上述之背光模組，以及一設於該背光模組上方的液晶面板。 In addition, the liquid crystal display device of the present invention comprises a backlight module as described above, and a liquid crystal panel disposed above the backlight module.
本發明藉由該主板體側向地向外突伸之延伸部先行對光線進行導引及均勻化後，再使光線進入主板體，可使主板體可接收到均勻的亮度。並且，藉由在發光二極體上方設置壓條以將發光二極體固定於相對應的二導光板之間，同時因壓條設置於發光二極體上方，可使光線不致直接投射至光學膜片上而造成亮點或亮線，以達成均勻發光的要求，並且，可大幅縮短光學膜片與導光板的間距，以減少背光模組的厚度。 The invention guides and homogenizes the light by extending the laterally outwardly extending portion of the main body, and then allows the light to enter the main body, so that the main body can receive uniform brightness. Moreover, by providing a bead above the light emitting diode to fix the light emitting diode between the corresponding two light guide plates, and because the bead is disposed above the light emitting diode, the light is not directly projected onto the optical film. Bright spots or bright lines are formed to achieve uniform illumination, and the distance between the optical film and the light guide plate can be greatly shortened to reduce the thickness of the backlight module.
100‧‧‧背光模組 100‧‧‧Backlight module
11‧‧‧導光板 11‧‧‧Light guide
12‧‧‧發光二極體 12‧‧‧Lighting diode
13‧‧‧擴散片 13‧‧‧Diffuser
14‧‧‧混光空間 14‧‧‧Hybrid space
15‧‧‧間隙 15‧‧‧ gap
200‧‧‧背光模組 200‧‧‧Backlight module
21‧‧‧金屬底板 21‧‧‧Metal backplane
22、30‧‧‧電路板 22, 30‧‧‧ circuit board
23‧‧‧反射板 23‧‧‧reflector
24‧‧‧導光板 24‧‧‧Light guide
240‧‧‧主板體 240‧‧‧Main body
241‧‧‧延伸部 241‧‧‧Extension
242‧‧‧側面 242‧‧‧ side
26‧‧‧發光二極體 26‧‧‧Lighting diode
27‧‧‧壓條 27‧‧‧Lamination
270‧‧‧條狀主板體 270‧‧‧ strip body
271‧‧‧止擋部 271‧‧‧stop
272‧‧‧貫孔 272‧‧‧through holes
28‧‧‧支撐柱 28‧‧‧Support column
29‧‧‧光學膜片 29‧‧‧Optical diaphragm
300‧‧‧液晶面板 300‧‧‧LCD panel
400‧‧‧液晶顯示裝置 400‧‧‧Liquid crystal display device
第一圖為習知背光模組之示意圖；第二圖為本發明背光模組之一較佳實施例的剖視圖；第三圖為本發明背光模組之局部剖視圖；第四圖為本發明背光模組之分解圖；第五圖為本發明背光模組之局部上視圖；第六圖為本發明背光模組之壓條的剖視圖；第七圖為本發明背光模組之另一較佳實施例的剖視圖；以及第八圖為本發明液晶顯示裝置之示意圖。 The first figure is a schematic view of a conventional backlight module; the second figure is a cross-sectional view of a preferred embodiment of the backlight module of the present invention; the third figure is a partial cross-sectional view of the backlight module of the present invention; FIG. 5 is a partial top view of the backlight module of the present invention; FIG. 6 is a cross-sectional view of the bead of the backlight module of the present invention; and FIG. 7 is another preferred embodiment of the backlight module of the present invention. A cross-sectional view; and an eighth diagram is a schematic view of a liquid crystal display device of the present invention.
有關本發明之技術內容、詳細說明，以及功效，現配合圖式說明如下： The technical content, detailed description, and efficacy of the present invention are described below with reference to the following figures:
第二圖及第三圖分別為本發明之一較佳實施例的背光模組200的一剖視圖及一局部剖視圖。該背光模組200包含一金屬底板21、設置在該金屬底板21上的一電路板22、設置在電路板22上的一反射板23(見第三圖)、設置在反射板23上且包含複數導光板24之導光板組、設置於導光板24之間的發光二極體26、跨接在該等導光板24上且覆蓋該發光二極體26的一壓條27、設置在壓條27上的支撐柱28，以及經由支撐柱28支撐於該導光板24上方的複數光學膜片29。光學膜片29可包含擴散片、增亮片等，且不以此限。 2 and 3 are respectively a cross-sectional view and a partial cross-sectional view of a backlight module 200 according to a preferred embodiment of the present invention. The backlight module 200 includes a metal bottom plate 21, a circuit board 22 disposed on the metal base plate 21, a reflective plate 23 disposed on the circuit board 22 (see FIG. 3), and disposed on the reflective plate 23 and including a light guide plate group of the plurality of light guide plates 24, a light emitting diode 26 disposed between the light guide plates 24, a bead 27 bridging the light guide plates 24 and covering the light emitting diodes 26, and being disposed on the bead 27 The support post 28 and the plurality of optical films 29 supported by the support post 28 above the light guide plate 24. The optical film 29 may include a diffusion sheet, a brightness enhancement sheet, and the like, and is not limited thereto.
如第三圖所示，該電路板22與發光二極體26電連接。導光板24分別設置該發光二極體26之兩相對側，使發光二極體26將光線側向地射入導光板24內。反射板23用以將導光板24所向下擴散的光線向上反射回到導光板24內，以提高光線使用率。發光二極體26上方設置壓條27，以將發光二極體固定於相對應的二導光板之間，壓條的材質可以為半透明或不透明，避免光線不致直接向上投射至光學膜片29上而造成亮點或亮線。 As shown in the third figure, the circuit board 22 is electrically connected to the light emitting diode 26. The light guide plates 24 are respectively disposed on opposite sides of the light emitting diode 26, so that the light emitting diodes 26 directly illuminate the light into the light guide plate 24. The reflector 23 is configured to reflect the downwardly diffused light of the light guide plate 24 back into the light guide plate 24 to improve the light usage rate. A bead 27 is disposed above the LED 26 to fix the LED between the corresponding two light guide plates. The material of the bead may be translucent or opaque to prevent the light from being directly projected onto the optical film 29. Causes bright spots or bright lines.
如第四圖所示，為提高發光二極體26發出光線進入導光板24的比率，以減少漏光，同時形成一緩衝區以避免亮點，該導光板24除包含一主板體240外，並包含複數由該主板體240側向地朝向該等發光二極體26突伸的延伸部241，藉延伸部241導引光線進入主板體240，較佳地，該延伸部241於垂直該主板體之方向上的長度介於0.3至1mm之間。如第五圖所示，由於發光二極體26對應設置於延伸部241，延伸部241可將接收到的較高密度之光線先予以擴散，作為一光線的緩衝區，藉此可使經由延伸部241間接進入主板 體240之光線密度可與發光二極體26傾斜地直接射向主板體240之側面242之光線密度大致相同，以使主板體240在任何位置上皆可接收到均勻化的亮度。此外，壓條27係跨接在該等導光板24的主板體240上並覆蓋發光二極體26兩側之延伸部241，以將發光二極體固定於相對應的二導光板之間，另外，覆蓋於延伸部241上方的壓條，也可防止光線從延伸部241向上漏光。 As shown in the fourth figure, in order to increase the ratio of the light emitted from the LED 26 into the light guide plate 24 to reduce light leakage and form a buffer to avoid bright spots, the light guide plate 24 includes a main body 240 and includes The plurality of extensions 241 protruding from the main body 240 toward the LEDs 26 are guided by the extension portion 241 to guide the light into the main body 240. Preferably, the extension 241 is perpendicular to the main body. The length in the direction is between 0.3 and 1 mm. As shown in FIG. 5, since the light-emitting diodes 26 are correspondingly disposed on the extending portion 241, the extending portion 241 can diffuse the received higher-density light as a buffer of light, thereby extending the light. Department 241 indirectly enters the motherboard The light density of the body 240 can be substantially the same as the light density of the light emitting diode 26 obliquely directed toward the side 242 of the main body 240, so that the main body 240 can receive uniform brightness at any position. In addition, the bead 27 is connected to the main body 240 of the light guide plate 24 and covers the extending portions 241 on both sides of the LED 26 to fix the LED between the corresponding two light guide plates. The bead covering the extension portion 241 also prevents light from leaking upward from the extension portion 241.
並且，如第四圖及第六圖所示，該壓條27除包含一條狀主板體270外，更包含複數由該條狀主板體270向下突伸並與該發光二極體26錯開的止擋部271，且該止擋部271之兩側分別頂抵於該等導光板24之主板體240，藉以穩固導光板24與發光二極體26之相對位置。該止擋部271可防止相鄰發光二極體26所發出之光線相互干擾，特別是在相鄰發光二極體26係發出不同色光且須在不同時間點亮的應用上，可提高其影像品質。此外，該壓條27上形成有複數對應位在該發光二極體26上方，且與該止擋部271錯開的貫孔272。藉由控制貫孔272的大小與設置密度，可使光學膜片29接收到的光線的均勻度達到最佳化。 Moreover, as shown in the fourth and sixth figures, the bead 27 includes, in addition to the strip-shaped main body 270, a plurality of strips extending from the strip-shaped main body 270 and being offset from the LED 26. The blocking portion 271 and the two sides of the stopping portion 271 respectively abut against the main body 240 of the light guide plate 24, thereby stabilizing the relative position of the light guide plate 24 and the light emitting diode 26. The stopping portion 271 can prevent the light emitted by the adjacent light-emitting diodes 26 from interfering with each other, in particular, in an application in which the adjacent light-emitting diodes 26 emit different colors of light and must be lit at different times. quality. In addition, the bead 27 is formed with a plurality of through holes 272 corresponding to the LEDs 26 and offset from the stoppers 271. By controlling the size and density of the through holes 272, the uniformity of the light received by the optical film 29 can be optimized.
第七圖為本發明之另一較佳實施例的背光模組200的一剖視圖，大致與上述較佳實施例相同，不同之處在於本實施例將壓條置換成為一電路板30，並且省去上述較佳實施例中設置在發光二極體下方的電路板。藉電路板30供發光二極體26設置於其上且與發光二極體26電連接，此外，其用途也與壓條相同，亦不再重述。 FIG. 7 is a cross-sectional view of a backlight module 200 according to another preferred embodiment of the present invention, which is substantially the same as the above-described preferred embodiment, except that the embodiment replaces the bead into a circuit board 30, and saves In the above preferred embodiment, the circuit board is disposed under the light emitting diode. The circuit board 30 is provided with the light-emitting diode 26 and is electrically connected to the light-emitting diode 26, and the use thereof is also the same as that of the bead, and will not be repeated.
第八圖為本發明之一較佳實施例的液晶顯示裝置400的的一剖視圖。該液晶顯示裝置400包含一上述本發明之背光模組200，以及 一設置於該背光模組200上方的液晶面板300，藉由背光模組200提供液晶面板300一均勻的平面光源。 Figure 8 is a cross-sectional view showing a liquid crystal display device 400 in accordance with a preferred embodiment of the present invention. The liquid crystal display device 400 includes the backlight module 200 of the present invention described above, and A liquid crystal panel 300 disposed above the backlight module 200 provides a uniform planar light source of the liquid crystal panel 300 by the backlight module 200.
綜上所述，藉由該主板體240側向地向外突伸之延伸部241先行對光線進行導引及均勻化後，再使光線進入主板體240，可使主板體240可接收到較為均勻的亮度。並且，藉由在發光二極體26上方設置壓條以將發光二極體26固定於相對應的二導光板24之間，同時因壓條27或電路板30設置於發光二極體26上方，可使光線不致直接向上投射至光學膜片29上而造成亮點或亮線。藉此，縱使採用高亮度發光二極體，也不會使該些光學膜片29在發光二極體12上方區域的亮度明顯較其他區域為高，可達成均勻發光的要求，並且，由於不會在光學膜片29上造成亮點或亮線，所需的混光空間大幅減小，光學膜片29與導光板24之間的距離可大幅縮短，藉以有效減少背光模組的厚度。 In summary, the main body 240 can be received by the extension portion 241 protruding outwardly from the main body 240 to guide and homogenize the light, and then enter the main body 240. Brightness. In addition, a bead is disposed above the LED 26 to fix the LED 26 between the corresponding two light guide plates 24, and the bead 27 or the circuit board 30 is disposed above the LED 26. The light is not directly projected upward onto the optical film 29 to cause bright spots or bright lines. Therefore, even if a high-brightness light-emitting diode is used, the brightness of the optical film 29 in the region above the light-emitting diode 12 is not significantly higher than that in other regions, and uniform light emission can be achieved, and since Bright spots or bright lines are formed on the optical film 29, and the required light mixing space is greatly reduced, and the distance between the optical film 29 and the light guide plate 24 can be greatly shortened, thereby effectively reducing the thickness of the backlight module.
以上所述者僅為本發明之較佳實施例，並非用以限定本發明之實施範圍。凡依本發明申請專利範圍所作之等效變化與修飾，皆仍屬本發明專利所涵蓋範圍之內。 The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Equivalent changes and modifications made by the scope of the present invention remain within the scope of the present invention.
21‧‧‧金屬底板 21‧‧‧Metal backplane
22‧‧‧電路板 22‧‧‧ Circuit board
23‧‧‧反射板 23‧‧‧reflector
24‧‧‧導光板 24‧‧‧Light guide
26‧‧‧發光二極體 26‧‧‧Lighting diode
27‧‧‧壓條 27‧‧‧Lamination
272‧‧‧貫孔 272‧‧‧through holes
28‧‧‧支撐柱 28‧‧‧Support column
29‧‧‧光學膜片 29‧‧‧Optical diaphragm
Claims (8)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW99147356A TWI407208B (en) | 2010-12-31 | 2010-12-31 | Backlight module and liquid crystal display apparatus |
| US13/340,094 US8646928B2 (en) | 2010-12-31 | 2011-12-29 | Backlight module and liquid crystal display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW99147356A TWI407208B (en) | 2010-12-31 | 2010-12-31 | Backlight module and liquid crystal display apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201227090A TW201227090A (en) | 2012-07-01 |
| TWI407208B true TWI407208B (en) | 2013-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW99147356A TWI407208B (en) | 2010-12-31 | 2010-12-31 | Backlight module and liquid crystal display apparatus |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TWI407208B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200727028A (en) * | 2006-01-02 | 2007-07-16 | Radiant Opto Electronics Corp | Large-scale backside lighting module |
| TWM342519U (en) * | 2008-04-29 | 2008-10-11 | Wintek Corp | Backlight module |
| TWM392977U (en) * | 2010-05-18 | 2010-11-21 | Wintek Corp | Structure of liquid crystal display device |
-
2010
- 2010-12-31 TW TW99147356A patent/TWI407208B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200727028A (en) * | 2006-01-02 | 2007-07-16 | Radiant Opto Electronics Corp | Large-scale backside lighting module |
| TWM342519U (en) * | 2008-04-29 | 2008-10-11 | Wintek Corp | Backlight module |
| TWM392977U (en) * | 2010-05-18 | 2010-11-21 | Wintek Corp | Structure of liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201227090A (en) | 2012-07-01 |
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