TWI421588B - Backlight module - Google Patents
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- TWI421588B TWI421588B TW98146102A TW98146102A TWI421588B TW I421588 B TWI421588 B TW I421588B TW 98146102 A TW98146102 A TW 98146102A TW 98146102 A TW98146102 A TW 98146102A TW I421588 B TWI421588 B TW I421588B
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Description
本發明係關於一種背光模組，特別是一種設有遮蔽層之導光板之背光模組。The invention relates to a backlight module, in particular to a backlight module with a shielding layer and a light guide plate.
目前背光模組之發光源大多為單一光源，例如：發光二極體(LED)或冷陰極螢光燈管(CCFL)。如果採用發光二極體(LED)作為發光源可以提供比冷陰極螢光燈管(CCFL)更好的演色性，但是其輝度表現低於冷陰極螢光燈管(CCFL)。因此，如果同時採用二者作為發光源，則可以提供高輝度及高演色性。At present, the illumination source of the backlight module is mostly a single light source, such as a light emitting diode (LED) or a cold cathode fluorescent tube (CCFL). If a light-emitting diode (LED) is used as the light source, it can provide better color rendering than a cold cathode fluorescent tube (CCFL), but its luminance performance is lower than that of a cold cathode fluorescent tube (CCFL). Therefore, if both are used as the light source, high luminance and high color rendering can be provided.
參考圖1及圖2，分別顯示習知背光模組之剖視及俯視示意圖。該背光模組1包括一導光板11、複數個冷陰極螢光燈管(CCFL)12及複數個發光二極體(LED)13。該導光板11具有一出光面111、一底面112、二個側面113、114。該出光面111係相對該底面112，該等側面113、114係位於該出光面111及該底面112之間。該等冷陰極螢光燈管(CCFL)12係面對該底面112，使得該等冷陰極螢光燈管(CCFL)12所產生之光線經由該底面112進入該導光板11。該等發光二極體(LED)13係面對該等側面113、114，使得該等發光二極體(LED)13所產生之光線經由該等側面113、114進入該導光板11。Referring to FIG. 1 and FIG. 2, a cross-sectional view and a top view of a conventional backlight module are respectively shown. The backlight module 1 includes a light guide plate 11 , a plurality of cold cathode fluorescent lamp tubes (CCFLs) 12 , and a plurality of light emitting diodes (LEDs) 13 . The light guide plate 11 has a light emitting surface 111, a bottom surface 112, and two side surfaces 113 and 114. The light-emitting surface 111 is opposite to the bottom surface 112, and the side surfaces 113 and 114 are located between the light-emitting surface 111 and the bottom surface 112. The cold cathode fluorescent lamp tubes (CCFLs) 12 face the bottom surface 112 such that light generated by the cold cathode fluorescent lamps (CCFLs) 12 enters the light guide plate 11 via the bottom surface 112. The light-emitting diodes (LEDs) 13 face the sides 113 and 114 such that the light generated by the light-emitting diodes (LEDs) 13 enters the light guide plate 11 via the sides 113 and 114.
該背光模組1之缺點如下，該等冷陰極螢光燈管(CCFL)12及該等發光二極體(LED)13之光線並無法在該導光板11內完全均勻混合成白光，而會在該出光面111鄰近該等發光二極體(LED)13區域形成二個色差區域14，在該等色差區域14內之光線係為混光後不正常之偏紅白光。因此，該等色差區域14會影響該背光模組1之表現。The disadvantages of the backlight module 1 are as follows: the light of the cold cathode fluorescent lamp (CCFL) 12 and the light emitting diodes (LED) 13 cannot be completely uniformly mixed into white light in the light guide plate 11, but Two color difference regions 14 are formed on the light-emitting surface 111 adjacent to the light-emitting diode (LED) 13 region, and the light rays in the color difference regions 14 are abnormal red-white light after light mixing. Therefore, the color difference regions 14 affect the performance of the backlight module 1.
因此，有必要提供一創新且富進步性的設有遮蔽層之導光板之背光模組，以解決上述問題。Therefore, it is necessary to provide an innovative and progressive backlight module with a light-shielding layer with a shielding layer to solve the above problems.
本發明係提供一種背光模組，其包括一導光板、至少一第一光源、至少一第二光源及至少一遮蔽層。該導光板具有一出光面、一底面及至少一側面。該至少一第一光源係面對該底面，使得該至少一第一光源所產生之光線經由該底面進入該導光板。該至少一第二光源係面對該至少一側面，使得該至少一第二光源所產生之光線經由該至少一側面進入該導光板。該至少一遮蔽層係設置於該導光板之至少一側面之一部分，用以阻隔該至少一第二光源所產生之部分光線進入該導光板。The present invention provides a backlight module including a light guide plate, at least one first light source, at least one second light source, and at least one shielding layer. The light guide plate has a light emitting surface, a bottom surface and at least one side surface. The at least one first light source faces the bottom surface such that light generated by the at least one first light source enters the light guide plate via the bottom surface. The at least one second light source faces the at least one side such that light generated by the at least one second light source enters the light guide plate via the at least one side. The at least one shielding layer is disposed on a portion of the at least one side of the light guide plate to block a portion of the light generated by the at least one second light source from entering the light guide plate.
在該背光模組中，由於該至少一遮蔽層可以阻隔該至少一第二光源所產生之部分光線進入該導光板，進而可以降低該至少一第一光源及該至少一第二光源之光線在該導光板內混光後出現局部偏紅白光之色差情況，因此可在該導光板內得到較均勻混合之白光，提高該背光模組之表現。In the backlight module, the at least one shielding layer can block a portion of the light generated by the at least one second light source from entering the light guide plate, thereby reducing the light of the at least one first light source and the at least one second light source. After the light is mixed in the light guide plate, the chromatic aberration of the partial reddish white light occurs, so that a relatively uniform mixed white light can be obtained in the light guide plate, thereby improving the performance of the backlight module.
參考圖3，顯示本發明背光模組之第一實施例之剖視示意圖。該背光模組2包括一導光板21、至少一第一光源22、至少一第二光源23及至少一遮蔽層24。Referring to FIG. 3, a cross-sectional view of a first embodiment of a backlight module of the present invention is shown. The backlight module 2 includes a light guide plate 21 , at least one first light source 22 , at least one second light source 23 , and at least one shielding layer 24 .
該導光板21具有一出光面211、一底面212及至少一側面。在本實施例中，該至少一側面係為二個側面213、214。該出光面211係相對該底面212，該等側面213、214係設置於該出光面211及該底面212之間。The light guide plate 21 has a light emitting surface 211, a bottom surface 212 and at least one side surface. In this embodiment, the at least one side surface is two side surfaces 213, 214. The light-emitting surface 211 is opposite to the bottom surface 212. The side surfaces 213 and 214 are disposed between the light-emitting surface 211 and the bottom surface 212.
該至少一第一光源22係面對該底面212，使得該至少一第一光源22所產生之光線經由該底面212進入該導光板21。該至少一第二光源23係面對該至少一側面213、214，使得該至少一第二光源23所產生之光線經由該至少一側面213、214進入該導光板21。在本實施例中，該至少一第一光源22係為複數個冷陰極螢光燈管(CCFL)，其與該底面212間隔一間距，且該至少一第二光源23係為複數個發光二極體(LED)。The at least one first light source 22 faces the bottom surface 212 such that light generated by the at least one first light source 22 enters the light guide plate 21 via the bottom surface 212. The at least one second light source 23 faces the at least one side surface 213, 214 such that light generated by the at least one second light source 23 enters the light guide plate 21 via the at least one side surface 213, 214. In this embodiment, the at least one first light source 22 is a plurality of cold cathode fluorescent lamps (CCFLs) spaced apart from the bottom surface 212 by a distance, and the at least one second light source 23 is a plurality of light emitting diodes Polar body (LED).
該至少一遮蔽層24係設置於該導光板21之至少一側面213、214之一部分，用以阻隔該至少一第二光源23所產生之部分光線進入該導光板21。The at least one shielding layer 24 is disposed on a portion of the at least one side surface 213, 214 of the light guide plate 21 for blocking a portion of the light generated by the at least one second light source 23 from entering the light guide plate 21.
在本實施例中，該至少一遮蔽層24之材質包括但不限於以下三種。In this embodiment, the material of the at least one shielding layer 24 includes but is not limited to the following three.
第一、該至少一遮蔽層24係為一反射層，用以反射該至少一第二光源23所產生之部分光線。該反射層可以是一反射膜，其係塗佈於該至少一側面213、214。或者，該反射層可以是一反射片，其係貼附於該至少一側面213、214。First, the at least one shielding layer 24 is a reflective layer for reflecting a portion of the light generated by the at least one second light source 23. The reflective layer can be a reflective film applied to the at least one side 213, 214. Alternatively, the reflective layer can be a reflective sheet attached to the at least one side 213, 214.
第二、該至少一遮蔽層24係為一半穿透層，其穿透率係可介於30%~100%之間。Secondly, the at least one shielding layer 24 is a semi-transparent layer, and the transmittance may be between 30% and 100%.
第三、該至少一遮蔽層24之反射率可小於5%，且穿透率可小於10%。較佳地，該遮蔽層之材質可為塗料、顏料或油墨，更佳地前述為黑色之塗料、顏料或油墨。此外，該遮蔽層亦可以複數個點狀結構方式形成於導光板之至少一側面上。Third, the reflectivity of the at least one shielding layer 24 may be less than 5%, and the transmittance may be less than 10%. Preferably, the material of the shielding layer may be a paint, a pigment or an ink, and more preferably a black paint, a pigment or an ink. In addition, the shielding layer may be formed on at least one side of the light guide plate in a plurality of dot structures.
參考圖4，顯示圖3之導光板之側視示意圖。如圖所示，每一遮蔽層24之面積係為側面213之面積之三分之一至二分之一。或者，每一遮蔽層24之高度H2 係為側面213之高度H1 之三分之一至二分之一。Referring to Figure 4, a side view of the light guide of Figure 3 is shown. As shown, each of the obscuring layers 24 has an area that is one-third to one-half the area of the side 213. Alternatively, the height H 2 of each of the masking layers 24 is one-third to one-half of the height H 1 of the side faces 213.
較佳地，該至少一遮蔽層24係設置於該側面213之下半部。更佳地，該底面212及該側面213係相交於一交線，該至少一遮蔽層24之底端241係與該交線切齊。Preferably, the at least one shielding layer 24 is disposed on the lower half of the side surface 213. More preferably, the bottom surface 212 and the side surface 213 intersect at an intersection line, and the bottom end 241 of the at least one shielding layer 24 is aligned with the intersection line.
在該背光模組2中，由於該至少一遮蔽層24可以阻隔該至少一第二光源23所產生之部分光線進入該導光板21，進而可以降低該至少一第一光源22及該至少一第二光源23之光線在該導光板21內混光後出現局部偏紅白光之色差情況，因此可在該導光板21內得到較均勻混合之白光，提高該背光模組2之表現。In the backlight module 2, the at least one shielding layer 24 can block a portion of the light generated by the at least one second light source 23 from entering the light guide plate 21, thereby reducing the at least one first light source 22 and the at least one first When the light of the two light sources 23 is mixed in the light guide plate 21, the chromatic aberration of the partial reddish white light occurs, so that a relatively uniform mixed white light can be obtained in the light guide plate 21, thereby improving the performance of the backlight module 2.
參考圖5，顯示本發明背光模組之第二實施例之剖視示意圖。該背光模組3包括一導光板31、至少一第一光源32、至少一第二光源33及至少一遮蔽層34。Referring to Figure 5, there is shown a cross-sectional view of a second embodiment of the backlight module of the present invention. The backlight module 3 includes a light guide plate 31 , at least one first light source 32 , at least one second light source 33 , and at least one shielding layer 34 .
該導光板31具有一出光面311、一底面312及二個側面313、314。該底面312具有至少一開槽35，用以容置該至少一第一光源32，該至少一開槽35之側壁係為該底面312之一部分。The light guide plate 31 has a light emitting surface 311, a bottom surface 312 and two side surfaces 313 and 314. The bottom surface 312 has at least one slot 35 for receiving the at least one first light source 32. The sidewall of the at least one slot 35 is a part of the bottom surface 312.
該至少一第一光源32係面對該底面312，該至少一第二光源33係面對該等側面313、314。在本實施例中，該至少一第一光源32係為複數個冷陰極螢光燈管(CCFL)，該至少一第二光源33係為複數個發光二極體(LED)。The at least one first light source 32 faces the bottom surface 312, and the at least one second light source 33 faces the sides 313, 314. In this embodiment, the at least one first light source 32 is a plurality of cold cathode fluorescent lamps (CCFLs), and the at least one second light source 33 is a plurality of light emitting diodes (LEDs).
該至少一遮蔽層34係設置於該導光板31之至少一側面313、314之一部分，用以阻隔該至少一第二光源33所產生之部分光線進入該導光板31。The at least one shielding layer 34 is disposed on a portion of the at least one side surface 313, 314 of the light guide plate 31 for blocking a portion of the light generated by the at least one second light source 33 from entering the light guide plate 31.
參考圖6，顯示本發明背光模組之第三實施例之剖視示意圖。該背光模組4包括一導光板41、至少一第一光源42、至少一第二光源43及至少一遮蔽層44。Referring to Figure 6, there is shown a cross-sectional view of a third embodiment of the backlight module of the present invention. The backlight module 4 includes a light guide plate 41 , at least one first light source 42 , at least one second light source 43 , and at least one shielding layer 44 .
該導光板41具有一出光面411、一底面412及二個側面413、414。該至少一第一光源42係面對該底面412，該至少一第二光源43係面對該等側面413、414。在本實施例中，該至少一第一光源42係為複數個發光二極體(LED)，該至少一第二光源43亦為複數個發光二極體(LED)。The light guide plate 41 has a light emitting surface 411, a bottom surface 412 and two side surfaces 413 and 414. The at least one first light source 42 faces the bottom surface 412, and the at least one second light source 43 faces the sides 413, 414. In this embodiment, the at least one first light source 42 is a plurality of light emitting diodes (LEDs), and the at least one second light source 43 is also a plurality of light emitting diodes (LEDs).
該至少一遮蔽層44係設置於該導光板41之至少一側面413、414之一部分，用以阻隔該至少一第二光源43所產生之部分光線進入該導光板41。The at least one shielding layer 44 is disposed on a portion of the at least one side surface 413, 414 of the light guide plate 41 for blocking a portion of the light generated by the at least one second light source 43 from entering the light guide plate 41.
此外，補充說明的是，本發明遮蔽層可具有複數個微結構，而具有複數個微結構(圖未示)之遮蔽層，其穿透率係可介於30%~100%之間。而該些微結構可與導光板之至少一側面一體成型，如採用射出成型、押出成型、壓製成型、滾壓成型方式...等。此外，亦可在導光板之至少一側面以噴砂製程、雷射製程...等方式將微結構形成於導光板之至少一側面上。關於微結構的形成方式，並不以上述為限，舉凡可在膜片上形成微結構之方式，皆可應用於本發明背光模組之導光板上。In addition, it is to be noted that the shielding layer of the present invention may have a plurality of microstructures, and the shielding layer having a plurality of microstructures (not shown) may have a transmittance of between 30% and 100%. The microstructures may be integrally formed with at least one side surface of the light guide plate, such as injection molding, extrusion molding, press molding, roll forming, and the like. In addition, the microstructure may be formed on at least one side of the light guide plate by at least one side of the light guide plate by a sandblasting process, a laser process, or the like. The manner of forming the microstructure is not limited to the above, and any manner of forming a microstructure on the diaphragm can be applied to the light guide plate of the backlight module of the present invention.
上述實施例僅為說明本發明之原理及其功效，並非限制本發明，因此習於此技術之人士對上述實施例進行修改及變化仍不脫本發明之精神。本發明之權利範圍應如後述之申請專利範圍所列。The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the scope of the present invention. The scope of the invention should be as set forth in the appended claims.
1．．．習知背光模組1. . . Conventional backlight module
2．．．本發明第一實施例之背光模組2. . . Backlight module of the first embodiment of the present invention
3．．．本發明第二實施例之背光模組3. . . Backlight module of the second embodiment of the present invention
4．．．本發明第三實施例之背光模組4. . . Backlight module of the third embodiment of the present invention
11．．．導光板11. . . Light guide
12．．．冷陰極螢光燈管12. . . Cold cathode fluorescent tube
13．．．發光二極體13. . . Light-emitting diode
14．．．色差區域14. . . Chromatic aberration area
21．．．導光板twenty one. . . Light guide
22．．．第一光源twenty two. . . First light source
23．．．第二光源twenty three. . . Second light source
24．．．遮蔽層twenty four. . . Masking layer
31．．．導光板31. . . Light guide
32．．．第一光源32. . . First light source
33．．．第二光源33. . . Second light source
34．．．遮蔽層34. . . Masking layer
35．．．開槽35. . . Slotting
41．．．導光板41. . . Light guide
42．．．第一光源42. . . First light source
43．．．第二光源43. . . Second light source
44．．．遮蔽層44. . . Masking layer
111．．．出光面111. . . Glossy surface
112．．．底面112. . . Bottom
113．．．側面113. . . side
114．．．側面114. . . side
211．．．出光面211. . . Glossy surface
212．．．底面212. . . Bottom
213．．．側面213. . . side
214．．．側面214. . . side
241．．．遮蔽層之底端241. . . Bottom of the shielding layer
311．．．出光面311. . . Glossy surface
312．．．底面312. . . Bottom
313．．．側面313. . . side
314．．．側面314. . . side
411．．．出光面411. . . Glossy surface
412．．．底面412. . . Bottom
413．．．側面413. . . side
414．．．側面414. . . side
圖1顯示習知背光模組之剖視示意圖；1 is a cross-sectional view showing a conventional backlight module;
圖2顯示習知背光模組之俯視示意圖；2 is a top plan view showing a conventional backlight module;
圖3顯示本發明背光模組之第一實施例之剖視示意圖；3 is a cross-sectional view showing a first embodiment of a backlight module of the present invention;
圖4顯示圖3之導光板之側視示意圖；Figure 4 is a side view showing the light guide plate of Figure 3;
圖5顯示本發明背光模組之第二實施例之剖視示意圖；及FIG. 5 is a cross-sectional view showing a second embodiment of the backlight module of the present invention; and
圖6顯示本發明背光模組之第三實施例之剖視示意圖。6 is a cross-sectional view showing a third embodiment of the backlight module of the present invention.
2．．．本發明第一實施例之背光模組2. . . Backlight module of the first embodiment of the present invention
21．．．導光板twenty one. . . Light guide
22．．．第一光源twenty two. . . First light source
23．．．第二光源twenty three. . . Second light source
24．．．遮蔽層twenty four. . . Masking layer
211．．．出光面211. . . Glossy surface
212．．．底面212. . . Bottom
213．．．側面213. . . side
214．．．側面214. . . side
241．．．遮蔽層之底端241. . . Bottom of the shielding layer
Claims (19)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW98146102A TWI421588B (en) | 2009-12-31 | 2009-12-31 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW98146102A TWI421588B (en) | 2009-12-31 | 2009-12-31 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201122667A TW201122667A (en) | 2011-07-01 |
| TWI421588B true TWI421588B (en) | 2014-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW98146102A TWI421588B (en) | 2009-12-31 | 2009-12-31 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TWI421588B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI457659B (en) * | 2011-07-27 | 2014-10-21 | Au Optronics Corp | Backlight module |
| CN104238186A (en) | 2013-06-20 | 2014-12-24 | 扬升照明股份有限公司 | Backlight module |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI247179B (en) * | 2003-12-05 | 2006-01-11 | Gigno Technology Co Ltd | Edge-light unit |
| US20060050529A1 (en) * | 2004-09-09 | 2006-03-09 | Au Optronics Corporation | Backlight module with multiple light guiding plates and a display device using the backlight module |
| JP2006120594A (en) * | 2004-10-20 | 2006-05-11 | Samsung Electro-Mechanics Co Ltd | Backlight device reduced in thickness |
| JP2006148051A (en) * | 2004-06-30 | 2006-06-08 | Mitsubishi Chemicals Corp | Light emitting device, backlight unit for illumination and display device and display device |
| JP2007027099A (en) * | 2005-07-13 | 2007-02-01 | Samsung Electronics Co Ltd | Backlight assembly, display substrate and display device having same as well as display substrate and its manufacturing method |
| US7264373B2 (en) * | 2004-12-06 | 2007-09-04 | Chi Mei Optoelectronics Corp. | Backlight module |
| US7327929B2 (en) * | 2005-01-24 | 2008-02-05 | Au Optronics Corp. | Backlight module for 3D display device and method for displaying 3D images utilizing the same |
| US7350955B2 (en) * | 2005-03-09 | 2008-04-01 | Hannstar Display Corporation | Back light source module |
| US20080158477A1 (en) * | 2006-12-29 | 2008-07-03 | Innolux Display Corp. | Backlight module and liquid crystal display with the same |
| TW200846766A (en) * | 2007-05-25 | 2008-12-01 | Chi Mei Optoelectronics Corp | Backlight module and application thereof |
-
2009
- 2009-12-31 TW TW98146102A patent/TWI421588B/en not_active IP Right Cessation
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI247179B (en) * | 2003-12-05 | 2006-01-11 | Gigno Technology Co Ltd | Edge-light unit |
| JP2006148051A (en) * | 2004-06-30 | 2006-06-08 | Mitsubishi Chemicals Corp | Light emitting device, backlight unit for illumination and display device and display device |
| US20060050529A1 (en) * | 2004-09-09 | 2006-03-09 | Au Optronics Corporation | Backlight module with multiple light guiding plates and a display device using the backlight module |
| JP2006120594A (en) * | 2004-10-20 | 2006-05-11 | Samsung Electro-Mechanics Co Ltd | Backlight device reduced in thickness |
| US7264373B2 (en) * | 2004-12-06 | 2007-09-04 | Chi Mei Optoelectronics Corp. | Backlight module |
| US7327929B2 (en) * | 2005-01-24 | 2008-02-05 | Au Optronics Corp. | Backlight module for 3D display device and method for displaying 3D images utilizing the same |
| US7350955B2 (en) * | 2005-03-09 | 2008-04-01 | Hannstar Display Corporation | Back light source module |
| JP2007027099A (en) * | 2005-07-13 | 2007-02-01 | Samsung Electronics Co Ltd | Backlight assembly, display substrate and display device having same as well as display substrate and its manufacturing method |
| US20080158477A1 (en) * | 2006-12-29 | 2008-07-03 | Innolux Display Corp. | Backlight module and liquid crystal display with the same |
| TW200846766A (en) * | 2007-05-25 | 2008-12-01 | Chi Mei Optoelectronics Corp | Backlight module and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201122667A (en) | 2011-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Annulment or lapse of patent due to non-payment of fees |