CN209946597U - Side income formula backlight unit and fingerprint recognition device under screen with cavity - Google Patents
Side income formula backlight unit and fingerprint recognition device under screen with cavity Download PDFInfo
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- CN209946597U CN209946597U CN201920716021.1U CN201920716021U CN209946597U CN 209946597 U CN209946597 U CN 209946597U CN 201920716021 U CN201920716021 U CN 201920716021U CN 209946597 U CN209946597 U CN 209946597U
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Abstract
The utility model discloses a fingerprint recognition device under side income formula backlight unit and screen with cavity, this screen fingerprint recognition device include fingerprint recognition module, glass panels, liquid crystal module and be equipped with the side income formula backlight unit of cavity down, form the holding chamber between cavity and the liquid crystal module among the backlight unit, the fingerprint recognition module sets up at this holding intracavity. In addition, the two side rubber frames of the concave cavity of the backlight module are adhered with the liquid crystal module above in parallel. The utility model has novel structure, the fingerprint identification module is arranged in the holding cavity, the proportion of the frame can be reduced, and the screen occupation ratio is improved; secondly, because the two side rubber frames of the concave cavity of the backlight module are adhered with the liquid crystal module above in parallel, the two sides of the containing cavity can be sealed. The two sides of the accommodating cavity do not need to be additionally stretched to seal the rubber frame (or the iron frame), so that a wider black or white area is avoided, and the visual effect of the backlight module is improved.
Description
Technical Field
The utility model relates to a fingerprint identification technical field under the screen, concretely relates to side income formula backlight unit and fingerprint identification device under screen with cavity.
Background
With the rapid development of Liquid Crystal Display (LCD) and the popularization of full-screen, the technology of fingerprint identification under screen becomes a future development trend. From the principle of the existing fingerprint identification technology, the common fingerprint identification modes are optical, capacitance, heat sensitivity and ultrasonic wave respectively. For LCD display screens, optical fingerprint recognition with stronger penetrating power is the current main research direction.
In the LCD display device that has realized the fingerprint recognition under the screen, its fingerprint sensor sets up in the below of backlight unit. Because backlight unit among the device is straight following formula light source backlight unit, the fingerprint identification light that the fingerprint detection light emitter sent can pierce through backlight unit and carry the fingerprint identification sensor to discern after the reflection of glass panels. However, for the backlight module of the side-in light source, the fingerprint identification light cannot pass through the backlight module, and the fingerprint identification sensor is arranged below the backlight module, so that the fingerprint identification sensor is required to be arranged above the backlight module or beside the backlight module. But with fingerprint identification sensor setting when backlight unit's side, can lead to the frame too wide to be unfavorable for the development of full face screen. Therefore, the fingerprint identification sensor is arranged above the backlight module as the best choice.
At present, the fingerprint sensor is disposed above the backlight module, as shown in fig. 1, the backlight module is bent to form a holding cavity with the liquid crystal module, and then the fingerprint sensor is disposed in the holding cavity. Because the two sides of the accommodating cavity are generally sealed by stretching the rubber frame (or the iron frame), wider black or white areas can appear on the two sides of the accommodating cavity, thereby affecting the visual effect of the backlight module.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model provides a fingerprint recognition device under side income formula backlight unit and the screen with cavity.
The utility model discloses a solve the technical scheme that its problem adopted and be:
the utility model provides a side income formula backlight unit with cavity, includes light guide plate, optics diaphragm group, light source subassembly and glues the frame, it surrounds light guide plate, optics diaphragm group and light source subassembly wherein to glue the frame, light guide plate, optics diaphragm group and glue the frame and be close to the both sides of light source subassembly one end are to middle zone indent to form a cavity.
Furthermore, the cross section of the concave cavity is in an inverted trapezoid shape, and the longitudinal section of the concave cavity is in a triangular shape.
Furthermore, the cross section of the concave cavity is in a shape of an inverted trapezoid, and fillet transition is arranged at the joint of two side edges of the inverted trapezoid and the lower bottom edge; the longitudinal section of the concave cavity is triangular.
The utility model discloses the second aspect still provides a fingerprint identification device under screen, including the backlight unit that fingerprint identification module, glass panels, liquid crystal module and the first aspect provided, wherein:
the glass panel, the liquid crystal module and the backlight module are sequentially arranged from top to bottom in a laminated manner;
an accommodating cavity is formed between the concave cavity of the backlight module and the liquid crystal module;
two side rubber frames of the concave cavity of the backlight module are bonded with the liquid crystal module in parallel;
the fingerprint identification module sets up the holding intracavity.
The fingerprint identification module is arranged in the accommodating cavity, so that the proportion of the frame can be reduced, and the screen occupation ratio is improved; secondly, because the two side rubber frames of the concave cavity of the backlight module are adhered with the liquid crystal module above in parallel, the two sides of the containing cavity can be sealed. The two sides of the accommodating cavity do not need to be additionally stretched to seal the rubber frame (or the iron frame), so that a wider black or white area is avoided, and the visual effect of the backlight module is improved.
Furthermore, the cross section of the accommodating cavity is in a shape of an inverted trapezoid, and fillet transition is arranged at the joint of two side edges of the inverted trapezoid and the lower bottom edge; the longitudinal section of the concave cavity is triangular.
Further, the included angle alpha of the longitudinal section of the containing cavity is 1-20 degrees.
Further, the height h of the cross section of the accommodating cavity is 0.5-3 mm.
Further, the length l of the longitudinal section of the accommodating cavity is 5-40 mm.
Furthermore, the width w1 of the upper edge of the cross section of the accommodating cavity is consistent with the width of the optical film group in the backlight module, and the width w2 of the lower edge is 5-40 mm.
Further, the fingerprint identification module includes fingerprint detection light emitter and fingerprint identification sensor.
Further, the lamp further comprises a sealing structure, and one end, close to the light source component, of the accommodating cavity is sealed by the sealing structure.
Specifically, one side of the accommodating cavity close to the light source assembly is sealed through a stretching rubber frame (or an iron frame).
The sealing structure can isolate dust, moisture and other foreign matters.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a fingerprint identification device under screen, sets up the fingerprint identification module in the holding intracavity, can reduce the frame proportion, improves the screen and accounts for the ratio; secondly, because the two side rubber frames of the concave cavity of the backlight module are adhered with the liquid crystal module above in parallel, the two sides of the containing cavity can be sealed. The two sides of the accommodating cavity do not need to be additionally stretched to seal the rubber frame (or the iron frame), so that a wider black or white area is avoided, and the visual effect of the backlight module is improved.
Drawings
Fig. 1 is a schematic structural view of sealing two sides of an accommodating cavity by stretching a rubber frame in the prior art.
Fig. 2 is a schematic structural view of a backlight module according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
fig. 4 is a top view of a backlight module according to an embodiment of the present invention;
fig. 5 is a top view of a backlight module according to another embodiment of the present invention;
fig. 6 is a schematic structural view of the fingerprint identification device under the screen according to the embodiment of the present invention;
FIG. 7 is a schematic structural view of a section B-B in FIG. 6.
FIG. 8 is a schematic structural view of a section C-C in FIG. 6.
Wherein the reference numerals are:
the backlight module comprises a glass panel 1, a liquid crystal module 2, a backlight module 3, an upper brightness enhancement film 31, a lower brightness enhancement film 32, a diffusion sheet 33, a light guide plate 34, a shading glue 35, a light source component 36, a glue frame 37, a concave cavity 38, a side inclined plane 381, a connecting surface 382, a middle inclined plane 383, an accommodating cavity 4 and a sealing structure 5.
Detailed Description
For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example one
Referring to fig. 2-4, the first aspect of the present invention provides a side-in type backlight module with a cavity 38, wherein the backlight module 3 comprises an optical film set, a light guide plate 34, a light shielding glue 35, a light source assembly 36 and a glue frame 37, the optical film set is disposed on the light guide plate 34, and the glue frame 37 surrounds the light guide plate 34, the optical film set and the light source assembly 36 therein. In the present embodiment, the optical film set includes an upper brightness enhancement film 31, a lower brightness enhancement film 32 and a diffusion film 33, which are stacked in sequence from top to bottom, and the light source component 36 is an LED lamp; the light shielding glue 35 is adhered to the glue frame 37 and the upper brightness enhancement film 31. The light guide plate 34, the optical film group and the rubber frame 37 in the backlight module 3 are recessed into the middle area at two sides near one end of the light source component 36 to form a cavity 38, in this embodiment, the cross section of the cavity 38 is an inverted trapezoid, and the longitudinal section is a triangle; that is, the bottom surface of the cavity 38 is composed of two side inclined surfaces 381 and a middle inclined surface 383, and the side inclined surfaces 381 and the middle inclined surface 383 are connected by a line.
Example two
Referring to fig. 5, the backlight module 3 is different from the backlight module 3 of the first embodiment in that: the cross section of the concave cavity 38 is in a shape of an inverted trapezoid, and filleted corner transition is arranged at the joint of two side edges and the lower bottom edge of the inverted trapezoid; the cavity 38 is triangular in longitudinal cross-section. That is, the bottom surface of the cavity 38 is composed of two side inclined surfaces 381, a middle inclined surface 383, and a connecting surface 382 connecting the two side inclined surfaces 381 and the middle inclined surface 383. In this embodiment, the connecting surface 382 is a fan-shaped curved surface. In view of processing, the fan-shaped curved surface is easier to process than line connection, and the connection part is relatively not easy to break; from the light processing perspective, the curved surface connection is smoother than the line connection, and rays do not appear, so that the brightness of the backlight module 3 is more uniform.
EXAMPLE III
Referring to fig. 6-8, the utility model provides a fingerprint identification device under screen in the second aspect, the device includes fingerprint identification module, glass panels 1, LCD module 2 and the backlight unit 3 that above-mentioned first aspect provided, glass panels 1, LCD module 2 and backlight unit 3 from the top down stromatolite is arranged in proper order, and in this embodiment, this backlight unit 3 glues 35 through shading and pastes on LCD module 2. An accommodating cavity 4 for accommodating the fingerprint identification module is formed between the concave cavity 38 of the backlight module 3 and the liquid crystal module 2, in the embodiment, the cross section of the accommodating cavity 4 is in a shape of an inverted trapezoid, and filleted corner transition is arranged at the joint of two side edges and the lower bottom edge of the inverted trapezoid; the longitudinal section of the accommodating cavity 4 is triangular. The included angle alpha of the longitudinal section of the accommodating cavity 4 is 15 degrees, the height h of the cross section is 1.1mm, the length l of the longitudinal section is 8.61mm, the width of the upper side width w1 of the cross section is consistent with the width of the optical film group in the backlight module 3, and the width of the lower side width w2 of the cross section is 20 mm. In addition, the two side rubber frames 37 of the concave cavity 38 of the backlight module 3 are adhered in parallel with the liquid crystal module 2 above, so that the two sides of the accommodating cavity 4 can be sealed. And this holding chamber 4 is close to the one end of light source subassembly 36 then seals through seal structure 5, and in this embodiment, this seal structure 5 is formed for gluing frame 37 through tensile near light source subassembly 36 one side, and it can only to leave the breach that matches the fingerprint identification module and get into on seal structure 5 this moment. In other embodiments, the sealing structure 5 may be additionally processed separately, and the material thereof may be colloid or metal, etc., and it is only necessary to seal the accommodating cavity 4 and leave a gap for the matching fingerprint identification module to enter. In addition, in this embodiment, this fingerprint identification module includes fingerprint detection light emitter and fingerprint identification sensor.
The fingerprint identification module is arranged in the accommodating cavity 4, so that the proportion of the frame can be reduced, and the screen occupation ratio is improved; secondly, since the two side rubber frames 37 of the cavity 38 of the backlight module 3 are adhered to the upper liquid crystal module 2 in parallel, the two sides of the accommodating cavity 4 can be sealed. The two sides of the accommodating cavity 4 do not need to be additionally stretched to seal the rubber frame 37 (or the iron frame), so that a wider black or white area is avoided, and the visual effect of the backlight module 3 is improved.
The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides a side income formula backlight unit with cavity (38), includes light guide plate (34), optics diaphragm group, light source subassembly (36) and glues frame (37), glue frame (37) and surround light guide plate (34), optics diaphragm group and light source subassembly (36) wherein, characterized in that, light guide plate (34), optics diaphragm group and glue frame (37) are close to the both sides of light source subassembly (36) one end are to the middle zone indent to form a cavity (38).
2. The edge-type backlight module as claimed in claim 1, wherein the cavity (38) has a cross-section of an inverted trapezoid and a longitudinal cross-section of a triangle.
3. The lateral backlight module of claim 1, wherein the cavity (38) has a cross-section similar to an inverted trapezoid, and the junction between the two sides and the bottom edge of the inverted trapezoid is provided with a rounded transition; the longitudinal section of the concave cavity (38) is triangular.
4. An underscreen fingerprint identification device comprising a fingerprint identification module, a glass panel (1), a liquid crystal module (2) and a backlight module (3) according to any one of claims 1-3, wherein:
the glass panel (1), the liquid crystal module (2) and the backlight module (3) are sequentially arranged from top to bottom in a laminated manner;
an accommodating cavity (4) is formed between the concave cavity (38) of the backlight module (3) and the liquid crystal module (2);
two side rubber frames (37) of the concave cavity (38) of the backlight module (3) are bonded with the liquid crystal module (2) in parallel;
the fingerprint identification module is arranged in the accommodating cavity (4).
5. The fingerprint identification device under screen of claim 4, characterized in that, the cross section of the holding chamber (4) is of a shape of a reversed trapezoid, and the junction of two sides of the reversed trapezoid and the lower bottom edge is provided with a fillet transition.
6. An underscreen fingerprint identification device according to claim 5, wherein the longitudinal section of the accommodating cavity (4) has an included angle α of 1-20 °.
7. The underscreen fingerprint identification device according to claim 5, wherein the height h of the cross section of the accommodating cavity (4) is 0.5-3 mm.
8. An underscreen fingerprint identification device according to claim 5, wherein the length l of the longitudinal section of the accommodating cavity (4) is 5-40 mm.
9. The underscreen fingerprint identification device of claim 5, wherein the width w1 of the upper edge of the cross section of the accommodating cavity (4) is consistent with the width w of the optical film group in the backlight module (3), and the width w2 of the lower edge is 5-40 mm.
10. An underscreen fingerprint identification device according to any one of claims 5-9 further comprising a sealing structure (5), wherein the sealing structure (5) seals an end of the receiving cavity (4) adjacent to the light source assembly (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920716021.1U CN209946597U (en) | 2019-05-17 | 2019-05-17 | Side income formula backlight unit and fingerprint recognition device under screen with cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920716021.1U CN209946597U (en) | 2019-05-17 | 2019-05-17 | Side income formula backlight unit and fingerprint recognition device under screen with cavity |
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| Publication Number | Publication Date |
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| CN209946597U true CN209946597U (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920716021.1U Active CN209946597U (en) | 2019-05-17 | 2019-05-17 | Side income formula backlight unit and fingerprint recognition device under screen with cavity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095901A (en) * | 2019-05-17 | 2019-08-06 | 深圳市隆利科技股份有限公司 | A kind of lower fingerprint identification device of side entrance back module and screen equipped with cavity |
-
2019
- 2019-05-17 CN CN201920716021.1U patent/CN209946597U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095901A (en) * | 2019-05-17 | 2019-08-06 | 深圳市隆利科技股份有限公司 | A kind of lower fingerprint identification device of side entrance back module and screen equipped with cavity |
| CN110095901B (en) * | 2019-05-17 | 2024-01-19 | 深圳市隆利科技股份有限公司 | Side income formula backlight unit and fingerprint identification device under screen with cavity |
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