CN109493731A - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN109493731A CN109493731A CN201910057370.1A CN201910057370A CN109493731A CN 109493731 A CN109493731 A CN 109493731A CN 201910057370 A CN201910057370 A CN 201910057370A CN 109493731 A CN109493731 A CN 109493731A
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- bottom plate
- wall
- backlight module
- plate
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- 230000003287 optical effect Effects 0.000 claims description 26
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract 3
- 230000012447 hatching Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a backlight module which comprises a back frame, an upper frame and a supporting plate. The back frame is provided with a bottom plate and a first limiting wall. The first limiting wall is erected on the upper surface of the bottom plate and is adjacent to the first edge of the bottom plate. In the vertical projection direction of the bottom plate, a space is formed between the vertical projection of the outer surface of the first limiting wall and the vertical projection of the first edge of the bottom plate. An accommodating part is formed between the outer surface of the first limiting wall and the first edge of the bottom plate. The upper frame is provided with a top cover and a blocking wall. The retaining wall is connected with the lower surface of the top cover. At least part of the blocking wall is positioned outside the outer surface of the first limiting wall and the blocking wall is abutted against the back frame. The retaining wall extends into the receiving portion. The support plate is located in a space between the bottom plate and the top cover, wherein the upper surface of the first stopper wall does not go beyond the extension plane of the upper surface of the support plate. The invention can improve the display quality.
Description
Technical field
The present invention relates to a kind of backlight module, especially a kind of backlight module of narrow frame.
Background technique
Current display device designer trends are by previous bulky, the thick and heavy slimming of external form direction and lightweight
Direction develop, and the thickness of the frame of backlight module tends to the design of narrow frame gradually, so that the body of backlight module frame
Product reduces and under identical size finder, and the area for the display picture that display panel can watch is bigger, and visual effect is more preferable.
In general, existing backlight module is that upper ledge is set on back frame, and optical diaphragm is located at the top cover of upper ledge
Space between the bottom plate of back frame.But, for existing backlight module, understand since optical diaphragm is changed by temperature
There is the case where breathing, optical diaphragm is probably caused to abut to the side of back frame and generate fold, and then influences display quality.
Summary of the invention
One embodiment of the invention proposes a kind of backlight module, including back frame, upper ledge and support plate.Back frame have bottom plate and
First limited wall.First limited wall is stood on the upper surface of bottom plate and the first edge of neighbouring bottom plate.In the upright projection of bottom plate
On direction, there is spacing between the upright projection of the first edge of the upright projection and bottom plate of the outer surface of the first limited wall.The
Holding part is formed between the outer surface of one limited wall and the first edge of bottom plate.Upper ledge has top cover and retaining wall.Retaining wall connection top
The lower surface of lid.At least partly retaining wall is located at the outside of the outer surface of the first limited wall and retaining wall abuts back frame.Retaining wall protrudes into appearance
Set portion, space of the support plate between bottom plate and top cover, wherein upper table of the upper surface of the first limited wall not across support plate
The extended surface in face.
Wherein, which is a light guide plate, which limits position of the light guide plate in the space.
Wherein, a light source is further included, which is a diffuser plate, which is located at the bottom plate and diffusion of the back frame
Between plate.
Wherein, a support component is further included, which abuts the diffuser plate, and the support component is located at the back frame
Between the bottom plate and the diffuser plate.
Wherein, the retaining wall of the upper ledge abuts the bottom plate of the back frame.
Wherein, a lower surface of the retaining wall is plane.
Wherein, a lower surface of the retaining wall has a recess, which has the one of the lower surface for being depressed in the retaining wall
Groove surface, and the groove surface of the recess abuts the bottom plate.
Wherein, on the upright projection direction of the bottom plate, a thickness of the retaining wall is less than or equal to the spacing.
Wherein, an optical diaphragm is further included, which is located on the upper surface of the support plate, first limited wall
The upper surface lower than the optical diaphragm a lower surface an extended surface.
Wherein, which has more one side wall, which stands on the upper surface of the bottom plate and correspond to the one of the bottom plate
Second edge setting, on the upright projection direction of the bottom plate, the upright projection of an outer surface of the side wall and the bottom plate
The upright projection of the second edge is overlapped.
Wherein, a light source is further included, which is located between the side wall and the support plate.
Wherein, the extended surface of the upper surface of the support plate is crossed in a upper surface of the side wall.
Wherein, a upper surface of the side wall abuts the lower surface of the top cover.
Wherein, which further includes one folding piece, the tabs be located at the space between the bottom plate and the top cover and towards this
The direction of support plate extends, which is connected to the upper surface of first limited wall.
Wherein, an extended surface of a lower surface of the retaining wall is between the upper surface of the bottom plate and being somebody's turn to do for first limited wall
Between upper surface.
In conclusion the backlight module of the embodiment of the present invention, outer surface and the bottom plate of the first limited wall are protruded by retaining wall
First edge between be formed by holding part and back frame can be abutted, allow and be reduced to bottom plate at least part of retaining wall
In the range of.For existing backlight module, the embodiment of the present invention can at least omit the segment thickness of retaining wall.In addition,
Due to the first limited wall upper surface less than or equal to support plate upper surface extended surface, for position square light on the supporting plate
For learning diaphragm, space is extended laterally there are biggish, in this way, under backlight module long-time service or under because of environmental condition, light
When learning diaphragm expansion lateral extension, upper ledge can't be abutted to.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Detailed description of the invention
Fig. 1 is the appearance diagram for having the display device of backlight module of one embodiment of the invention.
Fig. 2 is in the display device of embodiment illustrated in fig. 1 using A-A as the diagrammatic cross-section of hatching line.
Fig. 3 is the schematic side view of the backlight module of one embodiment of the invention.
Fig. 4 is the schematic side view of the backlight module of another embodiment of the present invention.
Fig. 5 is the schematic side view of the backlight module of further embodiment of this invention.
Fig. 6 A is to show corresponding in embodiment illustrated in fig. 1 by the section of the display device of another embodiment of hatching line of A-A
It is intended to.
Fig. 6 B is the sectional perspective schematic diagram of Fig. 6 A illustrated embodiment.
Fig. 7 be corresponding in embodiment illustrated in fig. 1 using A-A as the diagrammatic cross-section of the backlight module of the another embodiment of hatching line.
Fig. 8 is the schematic top plan view of the backlight module of one embodiment of the invention.
Fig. 9 is the schematic top plan view of the backlight module of one embodiment of the invention.
Figure 10 A is the diagrammatic cross-section of the backlight module of the B-B hatching line corresponding to Fig. 9.
Figure 10 B is the diagrammatic cross-section for having the display device of backlight module of one embodiment of the invention.
Figure 11 is the schematic top plan view of the backlight module of another embodiment of the present invention.
Figure 12 is the diagrammatic cross-section for having the display device of backlight module of one embodiment of the invention.
Wherein, appended drawing reference:
1 display device, 100 backlight module
110 back frame, 111 bottom plate
112 limited wall of the upper surface 111a
1121 first upper surfaces limited wall 1121a
1,122 second limited wall of the outer surface 1121c
1123 third limited wall of the outer surface 1122c
The 4th limited wall of the outer surface 1124 1123c
113 upper surfaces side wall 113a
120 upper ledge of the outer surface 113c
121 top cover, 122 retaining wall
The lower surface the 121b lower surface 122b
1221 tabs of 122c inner surface
130 support plates/the upper surface light guide plate 130a
140 lower surfaces optical diaphragm 140b
150 light source of the side surface 140c
160 upper surfaces support plate 160a
170 support component, 180 circuit substrate
190 reflector plate, 200 display panel
C chamfering D1 upright projection direction
The protrusion E H holding part
E1 extended surface E2 extended surface
E3 extended surface F spacing
L1 first edge L2 second edge
N recess N1 groove surface
The gap the P space S
T thickness
Specific embodiment
Fig. 1 is the appearance diagram of the display device 1 of the backlight module 100 with one embodiment of the invention.Fig. 2 is Fig. 1
Display device 1 in using A-A as the diagrammatic cross-section of hatching line.Fig. 1 and Fig. 2 is please referred to, display device 1 includes backlight module 100
With display panel 200.Backlight module 100 includes back frame 110, upper ledge 120 and support plate 130.Back frame 110 and 120 knot of upper ledge
It closes, and space S of the support plate 130 between back frame 110 and upper ledge 120.
Back frame 110 have bottom plate 111 and at least one be connected to the limited wall 112 (as illustrated in Figure 2 the of bottom plate 111
One limited wall 1121).First limited wall 1121 is stood on the upper surface 111a of bottom plate 111, and the first limited wall 1121 is the bottom of adjacent to
The first edge L1 of plate 111.In on the upright projection direction D1 of bottom plate 111, the outer surface 1121c's of the first limited wall 1121 hangs down
Delivering directly has spacing F between the upright projection of the first edge L1 of shadow and bottom plate 111.Therefore, the appearance of the first limited wall 1121
The upright projection of face 1121c is not Chong Die with the upright projection of first edge L1 of bottom plate 111.That is, the first limited wall
1121 outer surface 1121c is not trimmed with the first edge L1 of bottom plate 111.The outer surface 1121c of first limited wall 1121 with
Holding part H is formed between the first edge L1 of bottom plate 111.That is, outer surface of the holding part H by the first limited wall 1121
It 1121c and is made of outer surface 1121c to the part backplane 111 between first edge L1.
Upper ledge 120 has top cover 121 and retaining wall 122.The lower surface 121b of the connection top cover 121 of retaining wall 122.Top cover 121 can
To carry display panel 200.At least partly outside that is located at the outer surface 1121c of the first limited wall 1121 of retaining wall 122.Retaining wall
122 abut back frame 110, and retaining wall 122 protrudes into holding part H.In other words, retaining wall 122 extends across first toward 111 direction of bottom plate
The upper surface 1121a of limited wall 1121, to extend to holding part H.In this, on the upright projection direction D1 of bottom plate 111, retaining wall
122 upright projection is at least partly Chong Die with the upright projection of bottom plate 111.In other words, at least part of retaining wall 122 can inside contract
To bottom plate 111.In a state sample implementation, as illustrated in Figure 2, on the upright projection direction D1 of bottom plate 111, retaining wall
122 thickness T be less than or equal to spacing F, in this, the upright projection of retaining wall 122 and the upright projection for being less than first edge L1
And whole retaining walls 122 interior can be reduced in the range of bottom plate 111.In another state sample implementation (figure is not painted), retaining wall 122
Thickness T is greater than spacing F, and in this, on the upright projection direction D1 of bottom plate 111, the upright projection of retaining wall 122 is reducible slightly above the
The retaining wall 122 of the upright projection of one edge L1 and part can in be reduced in the range of bottom plate 111.
Support plate 130 is located at the space S between the bottom plate 111 of back frame 110 and the top cover 121 of upper ledge 120, the first limited wall
Extended surface E1 of the 1121 upper surface 1121a less than or equal to the upper surface 130a of support plate 130.That is the first limited wall
1121 do not cross the upper surface 130a of support plate 130 toward the upper surface 1121a of the extension of 121 direction of top cover and the first limited wall 1121
Extended surface E1.In the present embodiment, support plate 130 can be light guide plate 130, the first limited wall 1121 limit light guide plate 130 in
Position in space S.And in some embodiments, support plate 130 can be diffuser plate.
In this, the outer surface 1121c of the first limited wall 1121 and the first side of bottom plate 111 can be protruded by retaining wall 122
It is formed by holding part H between edge L1 and back frame 110 can be abutted, allows at least part of retaining wall 122 is interior to be reduced to bottom
In the range of plate 111, at least to omit the segment thickness of retaining wall 122.
There can be distance between the upper surface 1121a of first limited wall 1121 and the lower surface 121b of top cover 121.Change speech
It, the upper surface 1121a of the first limited wall 1121 does not abut the lower surface 121b of top cover 121.In this, upper ledge 120 can lead to
The embodiment for crossing different retaining walls 122 to abut with back frame 110.
In one of retaining wall 122 embodiment, as illustrated in Figure 2, retaining wall 122 extends toward bottom plate 111 direction and retaining wall 122
The bottom plate 111 of lower surface 122b contact back frame 110.Whereby, the lower surface 122b of retaining wall 122 can be connected to the bottom of back frame 110
Plate 111.
Referring to Fig. 3, the schematic side view of the backlight module 100 for one embodiment of the invention.In this embodiment, as schemed
Depicted in 3, it is seen by the side of backlight module 100, the lower surface 122b of retaining wall 122 is the upper surface of plane and bottom plate 111
111a is plane, and the lower surface 122b of retaining wall 122 can abut the upper surface 111a of bottom plate 111.
Referring to Fig. 4, the schematic side view of the backlight module 100 for another embodiment of the present invention.In this embodiment, such as
Depicted in Fig. 4, it is seen by the side of backlight module 100, the lower surface 122b of retaining wall 122 has an at least recess N.Recess N tool
Fluted face N1, and groove surface N1 is depressed in the lower surface 122b of retaining wall 122.Bottom plate 111 can have an at least protrusion E, and
The position of protrusion E and quantity correspond to position and the quantity of recess N.The groove surface N1 of recess N abuts the protrusion E of bottom plate 111.
Referring to Fig. 5, the schematic side view of the backlight module 100 for further embodiment of this invention.In this embodiment, such as
Depicted in Fig. 5, the edge of the lower surface 122b of retaining wall 122 for example forms an at least chamfering (chamfer) C, the fillet surface of chamfering C
Face the outer surface 1121c of the first limited wall 1121.
Please refer to Fig. 6 A to Fig. 6 B, Fig. 6 A be corresponding in embodiment illustrated in fig. 1 using A-A as another embodiment of hatching line
The diagrammatic cross-section of display device 1.Fig. 6 B is the upper ledge sectional perspective schematic diagram of Fig. 6 A illustrated embodiment.In this embodiment,
Retaining wall 122 for example further includes tabs 1221, space S of the tabs 1221 between bottom plate 111 and top cover 121.Tabs 1121
Such as by bending after a part of punching of retaining wall 122, essence is vertical between tabs 1121 and the part that retaining wall 122 is not bent,
And tabs 1221 is extended by the direction for being partially toward support plate 130 that retaining wall 122 is not bent and is connected to the first limited wall 1121
Upper surface 1121a.In this, by tabs 1221, retaining wall 122 can be connected to the upper of the first limited wall 1121 of back frame 110
Surface 1121a.In this embodiment, as depicted in Fig. 6 A, the extended surface of the lower surface 122b of retaining wall 122 is for example between bottom plate
Between the upper surface 1121a of 111 upper surface 111a and the first limited wall 1121.That is, the lower surface 122b of retaining wall 122
It is not connected to the bottom plate 111 of back frame 110, in this, retaining wall 122 can only be connected to back frame 110 by tabs 1221.
In another alternate embodiment of retaining wall 122, show as depicted in fig. 7, retaining wall 122 extends and keeps off toward 111 direction of bottom plate
The bottom plate 111 of the lower surface 122b contact back frame 110 of wall 122, and tabs 1221 is connected to the upper surface of the first limited wall 1121
1121a.In this, the lower surface 122b of retaining wall 122 can be connected to the bottom plate 111 of back frame 110 and by the setting of tabs 1221,
Retaining wall 122 can be supported on the first limited wall 1121 of back frame 110.
Referring again to Fig. 2, in this embodiment, backlight module 100 can further include optical diaphragm 140.Optical diaphragm 140
In on the upper surface 130a of support plate 130 (such as light guide plate).The upper surface 1121a of first limited wall 1121 is lower than optical diaphragm
The extended surface of 140 lower surface 140b, in this, the first limited wall 1121 can't intervene the side surface 140c of optical diaphragm 140
Gap P between the inner surface 122c of retaining wall 122, so, it can be by reducing the height of the first limited wall 1121, so that the
One limited wall 1121 is no more than the extended surface E1 of the upper surface 130a of support plate 130, and allow optical diaphragm 140 and retaining wall 122 it
Between form gap P to accommodate optical diaphragm 140 and may generate assembling tolerance when assembling or generate due to by temperature change
Swollen contracting amount.In addition, the quantity of optical diaphragm 140 depicted in Fig. 1 is only a piece of, and but, in other embodiments, optical diaphragm
140 quantity is also possible to multi-disc.In an embodiment, these optical diaphragms 140 can be for example but be not limited to diffusion sheet, reflection
Piece, light-collecting piece or optical diaphragm of complex function etc..
Fig. 8 is the schematic top plan view of the backlight module 100 of one embodiment of the invention.It should be noted that each to clearly show that
The connection relationship of element, in upper ledge 120 is omitted in this top cover 121, support plate 130, optical diaphragm 140 and light source 150, therefore
It can show the configuring condition between limited wall 112 and retaining wall 122.Referring to Fig. 8, back frame 110 for example has, there are four limited walls
112 (in this be the first limited wall 1121, the second limited wall 1122, third limited wall 1123 and the 4th limited wall 1124).This
A little first limited walls 1121, the second limited wall 1122, third limited wall 1123 and the 4th limited wall 1124 are respectively around branch
The surrounding of fagging 130 (omit and be painted in this figure), and forms rectangle frame, which forms the rectangle frame can be with
It is that the mode that mode that limited wall 112 is connected to each other is reached or is not connected with each other is reached, however, the present invention and unlimited
System.There are four retaining walls 122 for the tool of upper ledge 120, and these retaining walls 122 (limit respectively around four limited walls 112 in this for first
Wall 1121, the second limited wall 1122, third limited wall 1123 and the 4th limited wall 1124) surrounding and be located at holding part H, and
And rectangle frame is formed each other, likewise, the grade retaining walls 122 can form the rectangle frame or each other not phase with being connected to each other
Connection ground forms the rectangle frame, however, there is no restriction by the present invention.In this embodiment, in the upright projection direction of bottom plate 111
On D1, the thickness T of retaining wall 122 is less than spacing F, in this, the upright projection of retaining wall 122 and the upright projection for being less than bottom plate 111
And whole retaining walls 122 interior can be reduced in the range of bottom plate 111.
Fig. 9 and Figure 10 A is please referred to, Fig. 9 is the schematic top plan view of the backlight module 100 of one embodiment of the invention.Figure 10 A
For the diagrammatic cross-section of the backlight module 100 of the B-B hatching line corresponding to Fig. 9.It should be noted that for the company for clearly showing that each element
Relationship is connect, top cover 121, support plate 130 and the optical diaphragm 140 of upper ledge 120 is omitted in this, therefore can show limited wall
112, the configuring condition between side wall 113 and retaining wall 122.Back frame 110 can be with more at least one side wall 113, and side wall 113
Both ends connect with limited wall 112.Described to connect can be connection, adjacent or integrally formed relationship, and the present invention is simultaneously unlimited
System.Side wall 113 is stood on the upper surface 111a of bottom plate 111 and the second edge L2 setting of corresponding bottom plate 111.In bottom plate 111
On the D1 of upright projection direction, the upright projection of the second edge L2 of the upright projection and bottom plate 111 of the outer surface 113c of side wall 113
Overlapping.That is, the outer surface 113c of side wall 113 and the second edge L2 of bottom plate 111 are trimmed, and not there is no spacing.In this
In embodiment, as shown in Fig. 9 and Figure 10 A, back frame 110 for example have there are three limited wall 112 (in this be the first limited wall
1121, the second limited wall 1122 and third limited wall 1123) and a side wall 113.These first limited walls 1121, second
Limited wall 1122, third limited wall 1123 and side wall 113 are respectively around the four of support plate 130 (omit and be painted in this figure)
Week, and rectangle frame is formed each other.There are four retaining walls 122 for the tool of upper ledge 120, and these retaining walls 122 are limited around three respectively
Wall 112 (in this be the first limited wall 1121, the second limited wall 1122 and third limited wall 1123) and side wall 113
Surrounding, and rectangle frame is formed each other.It should be noted that holding part H is for example the outer surface for being formed in the first limited wall 1121
The outer surface 1123c of 1121c, the outer surface 1122c of the second limited wall 1122 and third limited wall 1123 respectively with bottom plate 111
Between each first edge L1.Due to the outer surface 113c of side wall 113 and the second edge L2 of bottom plate 111 are trimmed and between not having
Away from so the retaining wall 122 of corresponding side wall 113 is the outer surface 113c close to (or fitting) side wall 113.In this, in bottom plate 111
On the D1 of upright projection direction, the upright projection of retaining wall 122 is more than except the upright projection of bottom plate 111.
In this embodiment, as depicted in Figure 10 A, backlight module 100 further includes light source 150, and light source 150 is arranged in circuit
On substrate 180, circuit substrate 180 is, for example, rigid printed circuit board or flexible printed circuit.Side wall 113 and support plate
Spacing between the most similar side of 130 (such as light guide plates) is compared to limited wall 112 and the most similar side of support plate 130
Spacing come big, therefore space can be formed by between side wall 113 and the side of support plate 130 can be to be arranged light source
150 and provide light source 150 light mixing distance.In this, light source 150 be can be set between side wall 113 and support plate 130.Light source 150
It can be light emitting diode (Light-Emitting Diode, LED), micro- light emitting diode (Micro Light-Emitting
Diode, Micro LED), Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED), cold-cathode fluorescent
Lamp (Cold-Cathode Fluorescent Lamps, CCFLs) or EL part (Electroluminescence,
EL).In this, backlight module 100 using side light-entering type backlight module (side edge type backlight module) as
For example, and the non-limiting present invention.In addition, backlight module 100 also includes reflector plate 190, with visual angle shown in Figure 10 A, instead
It is general L-shape to penetrate piece 190, one between the first limited wall 1121 and support plate 130 (such as light guide plate), another then position exist
Between support plate 130 and bottom plate 111.
Figure 10 B is please referred to, to have the diagrammatic cross-section of the display device 1 of the backlight module 100 of one embodiment of the invention.
It is with one of at embodiment difference shown in Figure 10 A, backlight module 100 includes straight-down negative light-entry structure.Backlight module 100 is more
Including support plate 160, such as a kind of diffuser plate, rigidity is high compared with optical diaphragm 140, and support plate 160 is located at the top cover of bottom plate 111
Between 121, wherein extension of the upper surface 1121a of the first limited wall 1121 less than or equal to the upper surface 160a of support plate 160
Face E2.Light source 150 is located between the bottom plate 111 of back frame 110 and support plate 160 (such as diffuser plate), in one embodiment, light source
150 are arranged on circuit substrate 180.In addition, backlight module 100 further includes support component 170, it is located at bottom plate 111 and support plate
Between 160, and abut support plate 160.In some embodiments, support component 170 is for example as made by plastic material.Optical film
Piece 140 is located on the upper surface 160a of support plate 160 (such as diffuser plate), and the upper surface 1121a of the first limited wall 1121 is lower than light
Learn the extended surface of the lower surface 140b of diaphragm 140.It is designed with the structure of this backlight module 100, optical diaphragm 140 will not be because heated
It expands and abuts to the first limiting section 1121.
Figure 11 is please referred to, is the schematic top plan view of the backlight module 100 of another embodiment of the present invention.It should be noted that being
The connection relationship for clearly showing that each element, in upper ledge 120 is omitted in this top cover 121, support plate 130, optical diaphragm 140 and light
Source 150, therefore can show the configuring condition between limited wall 112, side wall 113 and retaining wall 122.Back frame 110 is opposite with two
Limited wall 112 (in this be the first limited wall 1121 and the second limited wall 1122) and two opposing sidewalls 113.These first limits
Position wall 1121, the second limited wall 1122 and two side walls 113 are respectively around the four of support plate 130 (omit and be painted in this figure)
Week, and a rectangle frame is formed each other.There are four retaining walls 122 for the tool of upper ledge 120, and these retaining walls 122 are limited around two respectively
Position wall 112 (in this be the first limited wall 1121 and the second limited wall 1122) and two side walls 113 surrounding, and each other
Form a rectangle frame.It should be noted that holding part H-shaped is in the outer surface 1121c and the second limited wall of the first limited wall 1121
1122 outer surface 1122c is respectively between each first edge L1 of bottom plate 111.Due to the outer surface 113c of side wall 113 and bottom
The second edge L2 of plate 111 is trimmed and is not had spacing, so the retaining wall 122 of corresponding side wall 113 is close to (or fitting) side wall
113 outer surface 113c.In this, on the upright projection direction D1 of bottom plate 111, the upright projection of retaining wall 122 is more than bottom plate 111
Upright projection except.
Among the above, the mode for forming rectangle frame can be connected to each other, adjacent but the modes such as be not connected to and reach, however, this
There is no restriction for invention.
Figure 12 is please referred to, to have the diagrammatic cross-section of the display device 1 of the backlight module 100 of one embodiment of the invention.In
In this embodiment, the upper surface 113a of side wall 113 crosses the extended surface E3 of the upper surface 130a of support plate 130 (such as light guide plate).
That is, side wall 113 extends toward 121 direction of top cover and the upper surface 113a of side wall 113 crosses the upper surface of support plate 130
The extended surface E3 of 130a.In this embodiment, the upper surface 113a of side wall 113 can abut the lower surface 121b of top cover 121.It borrows
This can abut top cover 121 by side wall 113 and upper ledge 120 is made to be connected to back corresponding to the side second edge L2 of bottom plate 111
Frame 110, facilitates structural strength.In this, backlight module 100 as an example, is not limited with side light-entering type backlight module
The fixed present invention, also can be used for directly descending light-entering type backlight module.
In conclusion the backlight module of the embodiment of the present invention, outer surface and the bottom plate of the first limited wall are protruded by retaining wall
First edge between be formed by holding part and back frame can be abutted, allow and be reduced to bottom plate at least part of retaining wall
In the range of.For existing backlight module, the embodiment of the present invention can omit the thickness of retaining wall.In addition, due to first
The upper surface of limited wall is less than or equal to the extended surface of the upper surface of support plate, therefore the optical diaphragm for position on the supporting plate
For, there are lateral wider spaces between upper ledge and optical diaphragm, in this way, under backlight module long-time service or because other
Under environmental condition, when optical diaphragm lateral expansion, upper ledge can't be touched and damaged.
Although technology contents of the invention have been disclosed above in the preferred embodiment, however, it is not to limit the invention,
Certainly, the present invention can also have other various embodiments, any to be familiar with those skilled in the art, do not depart from spirit of that invention and
Make in the case where its essence it is a little change and retouch, should all be covered by the scope of the claims in the present invention, thus the present invention
Protection scope when view as defined in claim subject to.
Claims (15)
1. a kind of backlight module characterized by comprising
One back frame has a bottom plate and one first limited wall, which stands on a upper surface of the bottom plate and neighbouring
One first edge of the bottom plate, on a upright projection direction of the bottom plate, the vertical throwing of an outer surface of first limited wall
There is a spacing, the outer surface of first limited wall and the bottom plate between the upright projection of this of shadow and the bottom plate first edge
The first edge between form a holding part；
One upper ledge has a top cover and a retaining wall, which connects a lower surface of the top cover, and at least partly the retaining wall, which is located at, is somebody's turn to do
The outside of the outer surface of the first limited wall and retaining wall abuts the back frame, which protrudes into the holding part；And
One support plate, the space between the bottom plate and the top cover, wherein a upper surface of first limited wall not across
One extended surface of one upper surface of the support plate.
2. backlight module according to claim 1, which is characterized in that the support plate is a light guide plate, first limited wall
Limit position of the light guide plate in the space.
3. backlight module according to claim 1, which is characterized in that a light source is further included, which is a diffuser plate,
The light source is located between the bottom plate of the back frame and the diffuser plate.
4. backlight module according to claim 3, which is characterized in that further include a support component, which abuts
The diffuser plate, and the support component is located between the bottom plate of the back frame and the diffuser plate.
5. backlight module according to claim 1, which is characterized in that the retaining wall of the upper ledge abuts the bottom of the back frame
Plate.
6. backlight module according to claim 1, which is characterized in that a lower surface of the retaining wall is plane.
7. backlight module according to claim 1, which is characterized in that a lower surface of the retaining wall has a recess, this is recessed
Mouth has a groove surface of the lower surface for being depressed in the retaining wall, and the groove surface of the recess abuts the bottom plate.
8. backlight module according to claim 1, which is characterized in that on the upright projection direction of the bottom plate, the gear
One thickness of wall is less than or equal to the spacing.
9. backlight module according to claim 1, which is characterized in that further include an optical diaphragm, which is located at
On the upper surface of the support plate, the upper surface of first limited wall is lower than an extension of a lower surface of the optical diaphragm
Face.
10. backlight module according to claim 1, which is characterized in that the back frame has more one side wall, which stands on this
On the upper surface of bottom plate and the setting of a second edge of the corresponding bottom plate, on the upright projection direction of the bottom plate, the side
The upright projection of one outer surface of wall is Chong Die with the upright projection of the second edge of the bottom plate.
11. backlight module according to claim 10, which is characterized in that further include a light source, which is located at the side wall
Between the support plate.
12. backlight module according to claim 10, which is characterized in that cross the support plate in a upper surface of the side wall
The extended surface of the upper surface.
13. backlight module according to claim 10, which is characterized in that a upper surface of the side wall abuts being somebody's turn to do for the top cover
Lower surface.
14. backlight module according to claim 1, which is characterized in that the retaining wall further includes one folding piece, which is located at should
The space between bottom plate and the top cover and extend towards the direction of the support plate, what which was connected to first limited wall should
Upper surface.
15. backlight module according to claim 14, which is characterized in that an extended surface of a lower surface of the retaining wall between
Between the upper surface of the bottom plate and the upper surface of first limited wall.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107146010 | 2018-12-19 | ||
| TW107146010A TWI681231B (en) | 2018-12-19 | 2018-12-19 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109493731A true CN109493731A (en) | 2019-03-19 |
| CN109493731B CN109493731B (en) | 2020-12-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910057370.1A Active CN109493731B (en) | 2018-12-19 | 2019-01-22 | Backlight module |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109493731B (en) |
| TW (1) | TWI681231B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115390316A (en) * | 2022-09-28 | 2022-11-25 | 惠科股份有限公司 | Backlight module and display device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239885A (en) * | 2020-03-04 | 2020-06-05 | 友达光电（苏州）有限公司 | Backlight module and display device |
| WO2022198629A1 (en) * | 2021-03-26 | 2022-09-29 | 瑞仪(广州)光电子器件有限公司 | Optical film, backlight module, and display device |
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Also Published As
| Publication number | Publication date |
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| CN109493731B (en) | 2020-12-08 |
| TW202024730A (en) | 2020-07-01 |
| TWI681231B (en) | 2020-01-01 |
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