TW201341903A - Backlight module, and light guide, and display thereof - Google Patents
Backlight module, and light guide, and display thereof Download PDFInfo
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Abstract
Description
本發明係有關於一種背光模組,特別是有關於一種可省略稜鏡片的背光模組。The present invention relates to a backlight module, and more particularly to a backlight module that can omit a cymbal.
習知之背光模組,包括發光二極體光源、導光板、擴散片、上稜鏡片以及下稜鏡片等元件。擴散片置於導光板上方,以將從導光板射出之光線均勻霧化。下稜鏡片置於擴散片上方,以將垂直方向光線均勻化,並導至背光模組正面。上稜鏡片則是置於下稜鏡片上方,以將水平方向光線均勻化,並導至背光模組正面。擴散片、上稜鏡片及下稜鏡片皆可使輝度增加。然而使用這麼多張光學膜片,其目的為增加正面光線強度,卻也因光線需穿透這些光學膜片而造成能量的減少,假設擴散片及上下稜鏡片穿透率皆為90%,射出導光板出光面之光能量為1,當光線經由這些光學膜片導正角度增加強度後,其能量也隨著遞減至72.9%。The conventional backlight module includes a light-emitting diode light source, a light guide plate, a diffusion sheet, a top sheet and a lower jaw piece. The diffusion sheet is placed above the light guide plate to uniformly atomize the light emitted from the light guide plate. The lower jaw is placed over the diffuser to homogenize the vertical light and lead to the front of the backlight module. The upper cymbal is placed above the lower cymbal to homogenize the horizontal light and lead to the front of the backlight module. The diffuser, the upper and lower jaws all increase the brightness. However, the use of so many optical films, the purpose is to increase the intensity of the front light, but also because the light needs to penetrate these optical films to reduce the energy, assuming that the diffuser and the upper and lower cymbals have a penetration rate of 90%, the injection The light energy of the light-emitting surface of the light guide plate is 1. When the light is increased in intensity by the positive angle of the optical film, the energy is also reduced to 72.9%.
本發明即為了欲解決習知技術之問題而提供之一種背光模組,包括一光源以及一導光板。光源提供複數第一光線。導光板包括一入光側、一反光面以及一出光面,一導光凹槽形成於該入光側,該光源對應該導光凹槽,其中,該等第一光線於該導光凹槽進入該導光板,成為複數第二光線,該等第二光線由該反光面反射,成為複數第三光線,而朝該出光面射出。The present invention provides a backlight module for solving the problems of the prior art, including a light source and a light guide plate. The light source provides a plurality of first rays. The light guide plate includes a light incident side, a light reflecting surface and a light emitting surface. A light guiding groove is formed on the light incident side, and the light source corresponds to the light guiding groove, wherein the first light rays are in the light guiding groove The light guide plate enters the plurality of light rays, and the second light rays are reflected by the light reflecting surface to form a plurality of third light rays, and are emitted toward the light emitting surface.
本發明亦提供一種導光板,包括一導光板本體,導光板本體包括一入光側、一反光面以及一出光面,一導光凹槽形成於該入光側,其中,複數第一光線於該導光凹槽進入該導光板,成為複數第二光線,該等第二光線由該反光面反射,成為複數第三光線,而朝該出光面射出。The invention also provides a light guide plate, comprising a light guide plate body, the light guide plate body comprises a light incident side, a light reflecting surface and a light emitting surface, wherein a light guiding groove is formed on the light incident side, wherein the plurality of first light rays are The light guiding groove enters the light guide plate to form a plurality of second light rays, and the second light rays are reflected by the reflecting surface to form a plurality of third light rays, and are emitted toward the light emitting surface.
本發明亦提供一種顯示器,包括一顯示面板以及一如上述之背光模組,其中該顯示面板與該背光模組層疊設置。The present invention also provides a display comprising a display panel and a backlight module as described above, wherein the display panel and the backlight module are stacked.
應用本發明實施例之背光模組,透過導光凹槽、反光部、反射微結構以及出光微結構等背光板設計手段,取代而省略習知技術的上、下稜鏡片,因此可避免光線穿過稜鏡片時的能量損失,並且,本發明實施例之背光模組的元件數量較少,因此可方便組裝。The backlight module of the embodiment of the present invention is used to replace the upper and lower cymbals of the prior art through the backlight design method such as the light guiding groove, the reflecting portion, the reflective microstructure, and the light-emitting microstructure, thereby avoiding light penetration. The energy loss in the case of smashing, and the number of components of the backlight module of the embodiment of the present invention are small, so that assembly can be facilitated.
參照第1A圖,其係顯示本發明第一實施例之背光模組1,包括一光源10、一導光板(導光板本體)20、一反射片30以及一擴散片40。光源10提供複數第一光線11。導光板20設於該反射片30及該擴散片40之間。Referring to FIG. 1A, a backlight module 1 according to a first embodiment of the present invention includes a light source 10, a light guide plate (light guide plate body) 20, a reflection sheet 30, and a diffusion sheet 40. Light source 10 provides a plurality of first rays 11. The light guide plate 20 is disposed between the reflection sheet 30 and the diffusion sheet 40.
導光板20包括一入光側21、一反光面22以及一出光面23。一導光凹槽211形成於該入光側21,該光源10對應該導光凹槽211。The light guide plate 20 includes a light incident side 21, a light reflecting surface 22, and a light exiting surface 23. A light guiding groove 211 is formed on the light incident side 21, and the light source 10 corresponds to the light guiding groove 211.
該等第一光線11於該導光凹槽211進入該導光板20,經由該導光凹槽211折射成為複數第二光線12,值得注意的是,若以與水平方向平行的光線為基準(與水平方向夾角為0°),該等第二光線12與水平方向Y的夾角δ收斂在±20°之間,該等第二光線12由該反光面22反射成為複數第三光線13,而朝該出光面23射出。The first light rays 11 enter the light guide plate 20 in the light guiding groove 211, and are refracted into the plurality of second light rays 12 via the light guiding grooves 211. It is worth noting that the light rays parallel to the horizontal direction are used as a reference ( The angle δ between the second ray 12 and the horizontal direction Y converges between ±20°, and the second ray 12 is reflected by the reflective surface 22 into a plurality of third rays 13 The light exit surface 23 is emitted.
該等第一光線11包括第一入射光111以及第二入射光112,第一入射光111於該導光凹槽211進入該導光板20,該導光凹槽211包括一反光部212,該等第一入射光111經由該反光部212的反射成為複數第二光線12之第一出射光121,該等第一出射光121由該反光面22反射成為該等第三光線13而朝該出光面23射出。The first light ray 11 includes a first incident light 111 and a second incident light 112. The first incident light 111 enters the light guide plate 20 in the light guide groove 211. The light guide groove 211 includes a light reflecting portion 212. The first incident light 111 is reflected by the light reflecting portion 212 to become the first outgoing light 121 of the plurality of second light rays 12, and the first outgoing light 121 is reflected by the reflective surface 22 into the third light rays 13 to be emitted toward the light. Face 23 is shot.
在上述實施例中,該導光凹槽211包括一非球面結構213,該等第一光線11之第二入射光112穿過該非球面結構213而進入該導光板而成為複數第二光線12之第二出射光122,該等第二出射光122由該反光面22反射成為該等第三光線13,而朝該出光面23射出。In the above embodiment, the light guiding groove 211 includes an aspherical structure 213, and the second incident light 112 of the first light rays 11 passes through the aspherical structure 213 to enter the light guide plate to become the plurality of second light rays 12 The second outgoing light 122 is reflected by the reflective surface 22 into the third light rays 13 and is emitted toward the light exit surface 23 .
在第一實施例中,該導光板20為一楔形板,該反光面22與該出光面23之間具有一楔形夾角θ。In the first embodiment, the light guide plate 20 is a wedge plate, and the reflective surface 22 and the light exit surface 23 have a wedge angle θ.
複數反射微結構221形成於該反光面22,搭配參照第1B圖,每一反射微結構221包括一近光端面222以及一遠光端面223,該近光端面222鄰接該遠光端面223,該遠光端面223與該反光面22間形成一遠光端面夾角α為55°-θ-δ。該近光端面222與該反光面22間形成一近光端面夾角β為θ+δ。每一反射微結構的寬高(w1/h1)比值為4.9~5.6。A plurality of reflective reflective structures 221 are formed on the reflective surface 22 . Referring to FIG. 1B , each reflective microstructure 221 includes a low beam end surface 222 and a high beam end surface 223 . The low beam end surface 222 is adjacent to the high beam end surface 223 . A high beam end angle α is formed between the high beam end surface 223 and the reflecting surface 22 by 55°-θ-δ. A near-light end face angle β between the low beam end surface 222 and the reflective surface 22 is θ+δ. The width-height (w1/h1) ratio of each reflective microstructure is 4.9 to 5.6.
透過本發明第一實施例之導光凹槽211、反光部212及反射微結構221等設計,可使該等第三光線13與一第一平面(X-Z平面)相互平行,達成垂直方向上的光線均勻化,因此可取代而省略習知技術的下稜鏡片。第一實施例之背光模組1可單與習知技術之上稜鏡片搭配使用,透過習知技術的上稜鏡片,達成水平方向上的光線均勻化。Through the design of the light guiding groove 211, the light reflecting portion 212 and the reflective microstructure 221 of the first embodiment of the present invention, the third light rays 13 and a first plane (XZ plane) can be parallel to each other to achieve a vertical direction. The light is uniformized, so that the lower jaw of the prior art can be omitted instead. The backlight module 1 of the first embodiment can be used in combination with the upper cymbal of the prior art, and the light uniformity in the horizontal direction can be achieved by the upper cymbal of the prior art.
反射片30可以反光塗層或其他型式的反光手段予以取代,或,可加以省略,上述揭露並未限制本發明。The reflective sheet 30 may be replaced by a reflective coating or other types of reflective means, or may be omitted, and the above disclosure does not limit the invention.
第2A圖係顯示本發明第一實施例之一變形例的導光板20立體圖,第2B圖係顯示第2A圖中之出光微結構的細部結構。參照第2A以及2B圖,在本發明第一實施例之一變形例中,複數個出光微結構231形成於該出光面23之上,該等第三光線13穿過該等出光微結構231,成為複數第四光線14,受到該出光微結構231的調制,而與一第二平面(Y-Z平面)相互平行,該第一平面垂直於該第二平面。透過第2A、2B圖實施例之出光微結構231,可達成水平方向上的光線均勻化,因此可取代而省略習知技術的上稜鏡片。在此實施例中,未調制前之光線水平方向發散角度為39度,每一出光微結構231的寬高(w2/h2)比值為1.2~1.6。出光微結構231的曲面可透過SNELL定律針對光線角度進行設計。Fig. 2A is a perspective view showing a light guide plate 20 according to a modification of the first embodiment of the present invention, and Fig. 2B is a view showing a detailed structure of the light exiting microstructure in Fig. 2A. Referring to FIGS. 2A and 2B, in a modification of the first embodiment of the present invention, a plurality of light-emitting microstructures 231 are formed on the light-emitting surface 23, and the third light rays 13 pass through the light-emitting microstructures 231. The plurality of fourth rays 14 are modulated by the light exiting microstructure 231 and parallel to a second plane (YZ plane) that is perpendicular to the second plane. Since the light-emitting microstructure 231 of the embodiment of FIGS. 2A and 2B can achieve uniform light in the horizontal direction, the conventional technique can be omitted instead. In this embodiment, the horizontal divergence angle of the light before unmodulation is 39 degrees, and the width-height (w2/h2) ratio of each light-emitting microstructure 231 is 1.2-1.6. The curved surface of the light-emitting microstructure 231 can be designed for the ray angle by SNELL's law.
應用本發明實施例之背光模組,透過導光凹槽、反光部、反射微結構以及出光微結構等背光板設計手段,取代而省略習知技術的上、下稜鏡片,因此可避免光線穿過稜鏡片時的能量損失,並且,本發明實施例之背光模組的元件數量較少,因此可方便組裝。The backlight module of the embodiment of the present invention is used to replace the upper and lower cymbals of the prior art through the backlight design method such as the light guiding groove, the reflecting portion, the reflective microstructure, and the light-emitting microstructure, thereby avoiding light penetration. The energy loss in the case of smashing, and the number of components of the backlight module of the embodiment of the present invention are small, so that assembly can be facilitated.
參照第3圖,其係顯示本發明第二實施例之背光模組2,其特點在於,該反光部212包括鋸齒狀結構214。鋸齒狀結構214可進一步降低導光板的厚度,並同時維持良好的光線平行化效果。Referring to FIG. 3, a backlight module 2 according to a second embodiment of the present invention is shown, characterized in that the light reflecting portion 212 includes a sawtooth structure 214. The serrated structure 214 can further reduce the thickness of the light guide plate while maintaining a good light parallelization effect.
參照第4圖,其係顯示本發明第三實施例之背光模組3,其特點在於,該導光板20’並非楔形板而為一平板,在本發明第三實施例中,透過適當設計導光凹槽及反光部的曲面,以及反射微結構的角度,同樣可達成垂直方向上的光線均勻化,以取代而省略習知技術的下稜鏡片。上述揭露之導光板型式並未限制本發明。Referring to FIG. 4, a backlight module 3 according to a third embodiment of the present invention is shown. The light guide plate 20' is not a wedge plate but is a flat plate. In the third embodiment of the present invention, a proper design guide is adopted. The curved surface of the light groove and the light reflecting portion, and the angle of the reflective microstructure, can also achieve uniformity of light in the vertical direction, instead of omitting the lower jaw of the prior art. The above disclosed light guide plate type does not limit the invention.
本發明提供包括上述背光模組之顯示器之實施例,該顯示器包括一顯示面板,以及如上述背光模組與該顯示面板層疊設置,該顯示面板可為液晶顯示面板。The present invention provides an embodiment of a display including the above backlight module. The display includes a display panel, and the backlight module is stacked on the display panel, and the display panel can be a liquid crystal display panel.
雖然本發明已以具體之較佳實施例揭露如上,然其並非用以限定本發明,任何熟習此項技藝者,在不脫離本發明之精神和範圍內,仍可作些許的更動與潤飾,因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.
1、2、3...背光模組1, 2, 3. . . Backlight module
10...光源10. . . light source
11...第一光線11. . . First light
111...第一入射光111. . . First incident light
112...第二入射光112. . . Second incident light
12...第二光線12. . . Second light
121...第一出射光121. . . First light
122...第二出射光122. . . Second exit light
13...第三光線13. . . Third light
14...第四光線14. . . Fourth light
20、20’...導光板20, 20’. . . Light guide
21...入光側twenty one. . . Light side
211...導光凹槽211. . . Light guide groove
212...反射部212. . . Reflection section
213...非球面結構213. . . Aspheric structure
214...鋸齒狀結構214. . . Serrated structure
22...反光面twenty two. . . Reflective surface
221...反射微結構221. . . Reflective microstructure
222...近光端面222. . . Low beam end face
223...遠光端面223. . . High beam end face
23...出光面twenty three. . . Glossy surface
231...出光微結構231. . . Light-emitting microstructure
30...反射片30. . . A reflective sheet
40...擴散片40. . . Diffusion sheet
第1A圖係顯示本發明第一實施例之背光模組;1A is a backlight module showing a first embodiment of the present invention;
第1B圖係顯示反射微結構的細部結構;Figure 1B shows the detailed structure of the reflective microstructure;
第2A圖係顯示本發明第一實施例之一變形例的導光板立體圖;2A is a perspective view showing a light guide plate according to a modification of the first embodiment of the present invention;
第2B圖係顯示第2A圖中之出光微結構的細部結構;Figure 2B shows the detailed structure of the light-emitting microstructure in Figure 2A;
第3圖係顯示本發明第二實施例之背光模組;以及3 is a backlight module showing a second embodiment of the present invention;
第4圖係顯示本發明第三實施例之背光模組。Fig. 4 is a view showing a backlight module of a third embodiment of the present invention.
1...背光模組1. . . Backlight module
10...光源10. . . light source
11...第一光線11. . . First light
111...第一入射光111. . . First incident light
112...第二入射光112. . . Second incident light
12...第二光線12. . . Second light
121...第一出射光121. . . First light
122...第二出射光122. . . Second exit light
13...第三光線13. . . Third light
14...第四光線14. . . Fourth light
20...導光板20. . . Light guide
21...入光側twenty one. . . Light side
211...導光凹槽211. . . Light guide groove
212...反射部212. . . Reflection section
213...非球面結構213. . . Aspheric structure
22...反光面twenty two. . . Reflective surface
221...反射微結構221. . . Reflective microstructure
222...近光端面222. . . Low beam end face
223...遠光端面223. . . High beam end face
23...出光面twenty three. . . Glossy surface
30...反射片30. . . A reflective sheet
40...擴散片40. . . Diffusion sheet
Claims (27)
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106842698A (en) * | 2016-12-28 | 2017-06-13 | 安徽连达光电科技有限公司 | A kind of side entering type lamp bar backing structure |
CN107807477A (en) * | 2017-11-28 | 2018-03-16 | 合肥泰沃达智能装备有限公司 | A kind of backlight module with wedge-shaped light-strip |
-
2012
- 2012-04-13 TW TW101113124A patent/TW201341903A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106842698A (en) * | 2016-12-28 | 2017-06-13 | 安徽连达光电科技有限公司 | A kind of side entering type lamp bar backing structure |
CN107807477A (en) * | 2017-11-28 | 2018-03-16 | 合肥泰沃达智能装备有限公司 | A kind of backlight module with wedge-shaped light-strip |
CN107807477B (en) * | 2017-11-28 | 2024-03-22 | 合肥泰沃达智能装备有限公司 | Backlight module with wedge-shaped light guide strip |
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