TWI589962B - Direct type backlight module - Google Patents

Direct type backlight module Download PDF

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Publication number
TWI589962B
TWI589962B TW100140419A TW100140419A TWI589962B TW I589962 B TWI589962 B TW I589962B TW 100140419 A TW100140419 A TW 100140419A TW 100140419 A TW100140419 A TW 100140419A TW I589962 B TWI589962 B TW I589962B
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TW
Taiwan
Prior art keywords
backlight module
type backlight
direct type
support
optical film
Prior art date
Application number
TW100140419A
Other languages
Chinese (zh)
Other versions
TW201319688A (en
Inventor
李一昌
廖國翰
蔡昇穎
柯俊宇
Original Assignee
奇菱光電股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 奇菱光電股份有限公司 filed Critical 奇菱光電股份有限公司
Priority to TW100140419A priority Critical patent/TWI589962B/en
Publication of TW201319688A publication Critical patent/TW201319688A/en
Application granted granted Critical
Publication of TWI589962B publication Critical patent/TWI589962B/en

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Description

Direct type backlight module
The invention relates to a direct type backlight module, in particular to a direct type backlight module with a support structure.
Referring to FIG. 1, a cross-sectional view of a conventional direct type backlight module is shown. The direct type backlight module 1 includes a back plate 11 , a plurality of LEDs 12 , a diffusion plate 13 , and a plurality of support columns 14 . The backboard 11 has an accommodating space 111. The LEDs 12 are located in the accommodating space 111. The diffuser plate 13 is located above the LEDs 12. One end of the support columns 14 is fixed on the back plate 11 and the other end contacts the diffusion plate 13 for supporting the diffusion plate 13 to prevent the diffusion plate 13 from falling.
However, although the support columns 14 solve the problem of the vertical drop of the diffusion plate 13, since the support columns 14 are solid cylinders, part of the light emitted by the LEDs 12 is blocked, resulting in the surface of the diffusion plate 13. Will produce dark lines. Further, as the diffusion plate 13 becomes thinner, the dark lines become more noticeable.
Therefore, it is necessary to provide an innovative and progressive direct-lit backlight module to solve the above problems.
The invention provides a direct type backlight module, which comprises a back plate, a plurality of light sources, an optical film and at least one supporting structure. The backboard has an accommodation space. The light sources are located in the accommodating space. The optical film is positioned above the light sources. The support structure is located in the accommodating space for supporting the optical film. The support structure has a cover body, and the side wall of the cover body is made of a light transmissive material, and defines a hollow cavity.
In the direct type backlight module, the support structure can prevent the optical film from falling down. In addition, the cover system is a light-transmissive material, and its outer shape is inverted U-shaped and hollow, so that the light emitted by the light sources is hardly blocked, so that the darkness on the surface of the optical film can be reduced.
The invention further provides a direct type backlight module, which comprises a back plate, a plurality of light sources, an optical film and at least one supporting structure. The backboard has an accommodation space. The light sources are located in the accommodating space. The optical film is positioned above the light sources. The support structure is located in the accommodating space and is a light transmissive material. The support structure is a sheet-shaped body, and one end of the support structure contacts the optical film to support the optical film.
Referring to FIG. 2, a cross-sectional view showing an embodiment of a direct type backlight module of the present invention is shown. The direct type backlight module 2 includes a back plate 21, a plurality of light sources 22, an optical film 23, and at least one support structure 24. The backboard 21 has an accommodating space 211. The light sources 22 are located in the accommodating space 211. In the present embodiment, the light sources 22 are LEDs; however, in other embodiments, the light sources 22 may be light tubes (CCFLs). The optical film 23 is located above the light sources 22. In the present embodiment, the optical film 23 is a diffusing plate and has a thickness of less than 2 mm, for example, 1.5 mm.
The support structure 24 is located in the accommodating space 211 for supporting the optical film 23 . The support structure 24 has a cover 25, and the side wall of the cover 25 is made of a light transmissive material, and defines a hollow cavity 251. In this embodiment, the sidewall of the cover 25 has a uniform thickness. Preferably, the sidewall of the cover 25 has a thickness of between 0.5 and 1.5 mm. In the present embodiment, the support structure 24 is the cover body 25 itself, and one end (upper end) contacts and supports the optical film 23, and the other end (lower end) is fixed to the back plate 21.
In the embodiment, the lower end of the cover body 25 has an extending flange 252, and the back plate 21 has a card slot 212 corresponding to the extending flange 252. The extension flange 252 is rotatably clipped to the card slot 212 such that the support structure 24 is fixed to the back plate 21. It can be understood that the support structure 24 can also be fixed to the backboard 21 by other means (such as locking, bonding, riveting or inserting). In addition, if the back plate 21 has a reflective sheet (not shown), the support structure 24 can be fixed to the back plate 21 through the reflective sheet, or the support structure 24 can be fixed on the reflective sheet. .
Referring to FIG. 3, a schematic top view of the direct type backlight module of FIG. 2 after removing the optical film is shown. The direct-type backlight module 2 includes four supporting structures 24 located at a central position of the accommodating space 211 and dispersed between the light sources 22 .
In the direct type backlight module 2, the support structure 24 can prevent the optical film 23 from falling down. In addition, the cover 25 is made of a light-transmissive material, and its outer shape is inverted U-shaped and hollow. Since the light emitted by the light sources 22 is less, the dark lines on the surface of the optical film 23 can be reduced. Happening.
4 and FIG. 5, FIG. 4 is a cross-sectional view showing another embodiment of the direct type backlight module of the present invention, and FIG. 5 is a schematic top view showing the optical module of the direct type backlight module of FIG. The direct type backlight module 2a of the present embodiment is substantially the same as the direct type backlight module 2 shown in FIG. 2 and FIG. 3, wherein the same elements are given the same numbers, and the difference is that, in this embodiment, each Support structure 24 encloses one of the light sources 22. That is, one of the light sources 22 is located in the hollow cavity 251 of the cover 25. In this embodiment, since the support structure 24 is located directly above a light source 22, it is farthest from the other light sources 22, and has the least influence on the other light sources 22, and the cover 25 is made of a light-transmitting material. . Therefore, the dark streaks on the surface of the optical film 23 can be further reduced.
Referring to FIG. 6, a cross-sectional view of another embodiment of the direct type backlight module of the present invention is shown. The direct type backlight module 3 of the present embodiment is substantially the same as the direct type backlight module 2 shown in FIGS. 2 and 3, wherein the same elements are given the same reference numerals, and the difference lies in the type of the support structure 24a. In this embodiment, the support structure 24a has a cover 26 and a top post 27. The side wall of the cover 26 is made of a light transmissive material and defines a hollow cavity 261. The side wall of the cover 26 has a uniform thickness. Preferably, the side wall of the cover 26 has a thickness of between 0.5 and 1.5 mm. One end (lower end) of the top post 27 is connected to the cover 26, and the other end (upper end) contacts and supports the optical film 23. The top pillar 27 is light transmissive or opaque, and the surface thereof may have a plurality of microstructures or matte finishes.
The top post 27 is a cone having an apex angle α between 5 and 15 degrees, and the maximum width of the top post 27 is between 2 and 7 mm. Preferably, the cover 26 and the top post 27 are integrally formed. Similarly, the lower end of the cover body 26 has an extending flange 262 for rotating the card slot 212 of the back plate 21 so that the support structure 24a is fixed to the back plate 21.
In addition, the support structure 24a can be fixed to the backboard 21 by means of snapping, locking, bonding, riveting or inserting. Moreover, if the backing plate 21 has a reflective sheet (not shown), the supporting structure 24a can be fixed to the backing plate 21 through the reflective sheet, or the supporting structure 24a can be fixed on the reflective sheet. .
Referring to FIG. 7, a schematic top view of the direct type backlight module of FIG. 6 after removing the optical film is shown. The direct-type backlight module 3 includes four supporting structures 24a located at a central position of the accommodating space 211 and dispersed between the light sources 22.
In the direct type backlight module 3, the support structure 24a can prevent the optical film 23 from falling down. In addition, since the top pillar 27 is a thinned cylinder, the light emitted from the light source 22 is less, so that the darkness on the surface of the optical film 23 can be reduced.
Referring to FIG. 8, a cross-sectional view of another embodiment of the direct type backlight module of the present invention is shown. Referring to FIG. 9, a schematic top view of the direct type backlight module of FIG. 8 after removing the optical film is shown. The direct type backlight module 3a of the present embodiment is substantially the same as the direct type backlight module 3 shown in FIG. 6 and FIG. 7, wherein the same elements are given the same numbers, and the difference is that, in this embodiment, each The support structure 24a covers one of the light sources 22. That is, one of the light sources 22 is located in the hollow cavity 261 of the cover 26.
In addition, the light of the light source 22 can penetrate the cover 26, and a part of the light can be introduced into the top post 27, and a plurality of microstructures or matte treatments on the surface of the top post 27 can be used to guide the light to the top. Column 27. Alternatively, a plurality of microstructures or matte finishes are formed only on one or a half of the surface of the top post 27 adjacent the cover 26.
In this embodiment, since the support structure 24a is located directly above the light source 22, it is farthest from the other light sources 22, and has the least influence on the other light sources 22, and the top pillar 27 is a thinned type. The cylinders cover the light sources 22 to emit less light, which can further reduce the darkness on the surface of the optical film 23.
Referring to FIG. 10, a cross-sectional view showing another embodiment of the direct type backlight module of the present invention is shown. The direct type backlight module 4 of the present embodiment is substantially the same as the direct type backlight module 2 shown in FIGS. 2 and 3, wherein the same elements are given the same reference numerals, and the difference lies in the type of the support structure 24b. In the present embodiment, the support structure 24b is a sheet-like body 28 for supporting the optical film 23. The sheet 28 is made of a light transmissive material and has a uniform thickness. Preferably, the sheet 28 has a thickness of between 0.5 and 1.5 mm. In the present embodiment, the sheet-like body 28 is triangular, and one end (upper end) is in contact with and supports the optical film 23, and the other end (lower end) is fixed to the back plate 21. In other embodiments, the sheet may also be rectangular or of other shapes.
In the embodiment, the lower end of the sheet body 28 has a protruding portion 281, and the back plate 21 has a through hole 213 corresponding to the protruding portion 281. The protruding portion 281 is inserted through the through hole 213 to be engaged with the back plate 21 such that the supporting structure 24b is fixed to the back plate 21. It can be understood that the support structure 24b can also be fixed to the backboard 21 by other means (such as locking, bonding, riveting or inserting). In addition, if the backing plate 21 has a reflective sheet (not shown), the supporting structure 24b can be fixed to the backing plate 21 through the reflective sheet, or the supporting structure 24b can be fixed on the reflective sheet. .
Referring to FIG. 11, a schematic top view of the direct type backlight module of FIG. 10 after removing the optical film is shown. The direct type backlight module 4 includes four supporting structures 24b located at a central position of the accommodating space 211. Each of the support structures 24b is located between the two rows of light sources 22, preferably parallel to the direction in which the light sources 22 are arranged (i.e., horizontal or vertical in the drawing).
In the direct type backlight module 4, the support structure 24b can prevent the optical film 23 from falling down. In addition, the support structure 24b is made of a light-transmitting material, and the light emitted from the light source 22 is less, so that the dark surface on the surface of the optical film 23 can be reduced.
The direct type backlight module of the present invention may further include other films disposed above the optical film 23, and other films may include, for example, a diffusion sheet, a condensing sheet, a reflective brightness enhancement film (DBEF), and the like. One or a combination thereof, but not limited to this.
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. . . Conventional direct type backlight module
2. . . One embodiment of the direct type backlight module of the present invention
2a. . . Another embodiment of the direct type backlight module of the present invention
3. . . Another embodiment of the direct type backlight module of the present invention
3a. . . Another embodiment of the direct type backlight module of the present invention
4. . . Another embodiment of the direct type backlight module of the present invention
11. . . Backplane
12. . . led
13. . . Diffuser
14. . . Support column
twenty one. . . Backplane
twenty two. . . light source
twenty three. . . Optical diaphragm
twenty four. . . supporting structure
24a. . . supporting structure
24b. . . supporting structure
25. . . Cover
26. . . Cover
27. . . Top column
28. . . Platelet
111. . . Housing space
211. . . Housing space
212. . . Card slot
213. . . Through hole
251. . . Cavity
252. . . Extended flange
261. . . Cavity
262. . . Extended flange
281. . . Protruding
α. . . Top angle
1 is a cross-sectional view showing a conventional direct type backlight module;
2 is a cross-sectional view showing an embodiment of a direct type backlight module of the present invention;
3 is a top plan view showing the optical module of the direct type backlight module of FIG. 2 after removing the optical film;
4 is a cross-sectional view showing another embodiment of the direct type backlight module of the present invention;
FIG. 5 is a top plan view showing the optical module after the optical module of FIG. 4 is removed;
6 is a cross-sectional view showing another embodiment of the direct type backlight module of the present invention;
7 is a top plan view showing the optical module of the direct type backlight module of FIG. 6 after removing the optical film;
8 is a cross-sectional view showing another embodiment of the direct type backlight module of the present invention;
9 is a top plan view showing the optical module of the direct type backlight module of FIG. 8 after removing the optical film;
FIG. 10 is a cross-sectional view showing another embodiment of the direct type backlight module of the present invention; and
FIG. 11 is a top plan view showing the direct type backlight module of FIG. 10 after the optical film is removed.
2. . . One embodiment of the direct type backlight module of the present invention
twenty one. . . Backplane
twenty two. . . light source
twenty three. . . Optical diaphragm
twenty four. . . supporting structure
25. . . Cover
211. . . Housing space
212. . . Card slot
251. . . Cavity
252. . . Extended flange

Claims (17)

  1. A direct type backlight module includes: a back plate having an accommodating space; a plurality of light sources located in the accommodating space; an optical film located above the light sources; and at least one supporting structure located at the accommodating structure The support structure has a cover body and a top post, the side wall of the cover body is a light transmissive material, and defines a hollow cavity, and one end of the top post is connected to the optical film. The cover has the other end contacting the optical film, and the surface of the top post has a plurality of microstructures.
  2. The direct type backlight module of claim 1, wherein the light sources are LEDs or tubes (CCFLs).
  3. The direct type backlight module of claim 1, wherein the top pillar has a vertex angle, and the vertex angle is between 5 and 15 degrees.
  4. The direct type backlight module of claim 1, wherein the maximum width of the top pillar is between 2 and 7 mm.
  5. The direct type backlight module of claim 1, wherein the optical film has a thickness of less than 2 mm.
  6. The direct type backlight module of claim 1, wherein one of the light sources is located in the hollow cavity of the cover.
  7. The direct type backlight module of claim 1, wherein the support structure is fixed to the back plate.
  8. The direct type backlight module of claim 1, wherein the side wall of the cover has a uniform thickness.
  9. The direct type backlight module of claim 8, wherein the thickness of the side wall of the cover is between 0.5 and 1.5 mm.
  10. The direct type backlight module of claim 1, wherein the optical film is a diffusion plate.
  11. A direct type backlight module includes: a back plate having an accommodating space; a plurality of light sources located in the accommodating space; an optical film located above the light sources; and at least one supporting structure located at the accommodating structure The support structure is a sheet-like body, and one end of the support structure is in contact with the optical film to support the optical film. The support structure is located between the two rows of light sources and is parallel. The direction in which the light sources are arranged.
  12. The direct type backlight module of claim 11, wherein the light sources are LEDs or tubes (CCFLs).
  13. The direct type backlight module of claim 11, wherein the support structure is fixed to the back plate.
  14. The direct type backlight module of claim 11, wherein the support structure has a uniform thickness.
  15. The direct type backlight module of claim 14, wherein the support structure has a thickness of between 0.5 and 1.5 mm.
  16. The direct type backlight module of claim 11, wherein the support structure is triangular or rectangular.
  17. The direct type backlight module of claim 11, wherein the optical film is a diffusion plate.
TW100140419A 2011-11-04 2011-11-04 Direct type backlight module TWI589962B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW100140419A TWI589962B (en) 2011-11-04 2011-11-04 Direct type backlight module

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
TW100140419A TWI589962B (en) 2011-11-04 2011-11-04 Direct type backlight module
CN2012103753259A CN103090264A (en) 2011-11-04 2012-09-29 Direct illumination type backlight module
JP2012236264A JP5658216B2 (en) 2011-11-04 2012-10-26 Direct type backlight module
JP2014002580A JP5869594B2 (en) 2011-11-04 2014-01-09 Direct type backlight module

Publications (2)

Publication Number Publication Date
TW201319688A TW201319688A (en) 2013-05-16
TWI589962B true TWI589962B (en) 2017-07-01

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Publication number Publication date
JP2014060181A (en) 2014-04-03
TW201319688A (en) 2013-05-16
JP5869594B2 (en) 2016-02-24
CN103090264A (en) 2013-05-08
JP2013098175A (en) 2013-05-20
JP5658216B2 (en) 2015-01-21

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