CN210803918U - Fingerprint identification backlight unit - Google Patents
Fingerprint identification backlight unit Download PDFInfo
- Publication number
- CN210803918U CN210803918U CN201921405702.2U CN201921405702U CN210803918U CN 210803918 U CN210803918 U CN 210803918U CN 201921405702 U CN201921405702 U CN 201921405702U CN 210803918 U CN210803918 U CN 210803918U
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- Prior art keywords
- fingerprint identification
- infrared light
- identification sensor
- backlight module
- guide plate
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- 239000012788 optical film Substances 0.000 claims abstract description 15
- 238000009792 diffusion process Methods 0.000 claims abstract description 13
- 239000010408 film Substances 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 8
- 238000010276 construction Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 description 7
- 238000011105 stabilization Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model discloses a backlight unit for LCD fingerprint identification. Backlight unit includes LED light source, optical film group and infrared light fingerprint identification sensor. The optical film group comprises a light guide plate arranged on one side of the LED light source, a diffusion film arranged above the light guide plate, a prism sheet arranged above the diffusion film, and a reflecting sheet arranged below the light guide plate. The infrared light fingerprint identification sensor is arranged above the LED light source. The infrared light fingerprint identification sensor is arranged adjacent to the optical diaphragm group. The utility model discloses a backlight unit carries biological fingerprint information's infrared signal directly, effectively by infrared light fingerprint identification sensor accurately gather, keeps backlight unit's visible light source's luminous luminance and the degree of consistency simultaneously. The whole backlight module is simpler in production, assembly process and structure, and high in structural stability.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a fingerprint identification backlight unit for LCD.
Background
LCD fingerprint identification display device obviously has bigger use scene scope and better cost advantage than OLED fingerprint identification display device, however, LCD display based fingerprint identification display device is not yet fully mature, especially can not compromise effective penetration and the accurate collection of fingerprint identification signal on the LCD module.
In the fingerprint recognition display device of the LCD display, as shown in fig. 1, by recognizing a fingerprint pressed on a glass cover plate 140 covering an LCD display screen; however, the optical signal for identifying the fingerprint at least passes through the LCD panel and the glass cover plate 140, and since the LCD panel is composed of the LCD module 130 and the backlight module 120, the glass cover plate has a certain thickness. Therefore, the optical signal is severely refracted and scattered, even totally reflected, in the process of passing through the optical film of the backlight module. In addition, when placing fingerprint identification unit 110 in the backlight unit below, the infrared light that carries biological fingerprint information can't penetrate backlight unit and reach fingerprint identification unit 110, can't realize fingerprint identification or accurate identification. US16028399 and US16032048, etc. both disclose designs in which a fingerprint recognition unit is disposed under a backlight module, which have become the inherent mode of implementing in-display fingerprint recognition, but the accuracy of fingerprint recognition still has certain problems.
Therefore, the realization of fingerprint identification based on LCD displays requires an improvement in the overall design of the backlight module.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a fingerprint identification backlight unit for LCD, can make fingerprint identification signal effectively pierce through and the accurate collection on backlight unit, does not influence the display picture quality of LCD display screen simultaneously.
In order to solve the technical problem, the utility model discloses a technical scheme provide a backlight unit, it includes LED light source, optical film group and infrared light fingerprint identification sensor. The optical film group comprises a light guide plate arranged on one side of the LED light source, a diffusion film arranged above the light guide plate, a prism sheet arranged above the diffusion film, and a reflecting sheet arranged below the light guide plate. The infrared light fingerprint identification sensor is arranged above the LED light source. The infrared light fingerprint identification sensor is arranged adjacent to the optical diaphragm group.
The utility model discloses a backlight unit need not set up infrared light fingerprint identification sensor in backlight unit's below, therefore the infrared signal who carries biological fingerprint information is direct, effectively gathered by infrared light fingerprint identification sensor accurately, keeps backlight unit's visible light source's luminous luminance and the degree of consistency simultaneously. In addition, the production, assembly process and structure of the whole backlight module are simpler, and the structural stability is high.
In a preferred embodiment, the upper surface of the infrared light fingerprint identification sensor is flush with the upper surface of the optical film group. Therefore, the whole backlight module can be smoothly attached to the LCD panel, the light-emitting utilization rate of the backlight module is increased, light leakage is reduced, and modularization of the backlight module and lightening and thinning of terminal equipment are facilitated.
In a preferred embodiment, the infrared light fingerprint identification sensor is arranged above the light guide plate, and the infrared light fingerprint identification sensor is connected with the light guide plate. The light guide plate supports and connects this infrared light fingerprint identification sensor, has promoted this infrared light fingerprint identification sensor's steadiness and job stabilization nature.
Further, the first arrangement mode of the infrared light fingerprint identification sensor on the light guide plate is as follows: this light guide plate is provided with the stair structure, and this infrared light fingerprint identification sensor gomphosis sets up on this stair structure, has further promoted this infrared light fingerprint identification sensor's steadiness and job stabilization nature.
Further, the infrared light fingerprint identification sensor is arranged on the light guide plate in a second mode: this light guide plate is provided with groove structure, and this infrared light fingerprint identification sensor gomphosis sets up on this groove structure, has further promoted this infrared light fingerprint identification sensor's steadiness and job stabilization nature.
Further, the infrared light fingerprint identification sensor is arranged on the light guide plate in a third mode: this light guide plate is provided with hollow out construction, and this infrared light fingerprint identification sensor gomphosis sets up on this hollow out construction, has further promoted this infrared light fingerprint identification sensor's steadiness and job stabilization nature.
In a preferred embodiment, the infrared light fingerprint identification sensor is arranged above the diffusion film, the infrared light fingerprint identification sensor is connected with the diffusion film, and the diffusion film is connected with the infrared light fingerprint identification sensor in a supporting way; or the infrared light fingerprint identification sensor is arranged above the prism sheet, the infrared light fingerprint identification sensor is connected with the prism sheet, and the prism sheet is connected with the infrared light fingerprint identification sensor in a supporting manner.
In a preferred embodiment, the backlight module further comprises an infrared light emitter for emitting infrared light and sensing and identifying the biological fingerprint information; the infrared light fingerprint identification sensor is characterized in that an infrared transparent shading layer is arranged above the infrared light fingerprint identification sensor and used for transmitting infrared light signals and reducing light leakage of the backlight module.
In a preferred embodiment, the backlight module further comprises a rubber frame, wherein the rubber frame is used for fixedly connecting the LED light source, the optical film set and the infrared fingerprint identification sensor; the backlight module also comprises shading glue which is used for bonding the LED light source, the optical diaphragm group and the infrared light fingerprint identification sensor and reducing light leakage of the backlight module.
According to the utility model discloses an embodiment, the utility model discloses a backlight unit integrates into an electronic equipment with LCD panel and glass apron, and it can be applied to the LCD display and is used for fingerprint identification's electron device. The utility model discloses a backlight unit is applied to fingerprint identification's electron device, can realize the accurate discernment and the verification to biological fingerprint information.
Drawings
The invention and its advantages will be better understood by studying the following non-limiting examples, and by studying the detailed description of specific embodiments shown in the appended drawings, in which:
fig. 1 is a block diagram of a fingerprint recognition display device of a related art LCD display.
Fig. 2 is an exploded view of the backlight module according to embodiment 1 of the present invention.
Fig. 3 is a structural view of the backlight module according to embodiment 1 of the present invention.
Fig. 4 is a structural view of a backlight module according to embodiment 2 of the present invention.
Fig. 5 is a structural view of a backlight module according to embodiment 3 of the present invention.
Fig. 6 is a structural view of a backlight module according to embodiment 4 of the present invention.
Fig. 7 is a structural view of a backlight module according to embodiment 5 of the present invention.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements throughout, the principles of the present invention are illustrated as being implemented in a suitable environment. The following description is based on illustrated embodiments of the invention and should not be taken as limiting the invention with regard to other embodiments not described in detail herein.
The word "embodiment" is used herein to mean serving as an example, instance, or illustration. In addition, the articles "a" and "an" as used in this specification and the appended claims may generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Further, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise direct contact of the first and second features through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Example 1
First, a backlight module according to embodiment 1 of the present invention will be described with reference to fig. 2 and 3. According to the backlight module of embodiment 1 of the present invention, as shown in fig. 2, the backlight module includes an optical film set 101, an infrared fingerprint sensor 102 and an LED light source 103. The optical film set 101 includes a light guide plate 230 disposed on one side of the LED light source 103, a diffusion film 220 disposed above the light guide plate 230, a prism sheet 210 disposed above the diffusion film 220, and a reflective sheet 240 disposed below the light guide plate 230. The infrared light fingerprint recognition sensor 102 is disposed above the LED light source 103. The LED light source 103 is usually provided with a reflective material, so the infrared fingerprint sensor 102 is disposed above the LED light source 103, and the infrared signal loss caused by the infrared signal reflected by the LED light source 103 can be avoided. The infrared light fingerprint identification sensor 102 is disposed adjacent to the optical film set 101.
The backlight module of this embodiment, the infrared signal that carries biological fingerprint information is direct, effectively is gathered by infrared light fingerprint identification sensor 102 accurately, keeps backlight module's visible light source's luminance and degree of consistency simultaneously. In addition, the production, assembly process and structure of the whole backlight module are simpler, and the structural stability is high.
The upper surface of the infrared light fingerprint identification sensor 102 is flush with the upper surface of the optical film set 101. Therefore, the whole backlight module can be smoothly attached to the LCD panel, the light-emitting utilization rate of the backlight module is increased, light leakage is reduced, and modularization of the backlight module and lightening and thinning of terminal equipment are facilitated.
The backlight module further comprises an infrared light emitter for emitting infrared light and sensing and identifying biological fingerprint information.
The backlight module further comprises a rubber frame, wherein the rubber frame is used for fixedly connecting the LED light source 103, the optical film group 101 and the infrared light fingerprint identification sensor 102; the backlight module further comprises a light shielding glue, and the light shielding glue is used for bonding the LED light source 103, the optical film set 101 and the infrared light fingerprint identification sensor 102 and reducing light leakage of the backlight module.
Example 2
Fig. 4 is a structural view of a backlight module according to embodiment 2 of the present invention. Only the differences between embodiment 2 and embodiment 1 will be described below, and the descriptions of the similarities will be omitted.
The infrared light fingerprint sensor 102 is disposed above the light guide plate 230, and the infrared light fingerprint sensor 102 is connected to the light guide plate 230. The light guide plate 230 supports and connects the infrared light fingerprint sensor 102, so that the stability and the working stability of the infrared light fingerprint sensor 102 are improved.
Example 3
Fig. 5 is a structural view of a backlight module according to embodiment 3 of the present invention. Only the differences between embodiment 3 and embodiment 2 will be described below, and the descriptions of the similarities are omitted here.
This light guide plate 230 is provided with the stair structure, and this infrared light fingerprint identification sensor 102 gomphosis sets up on this stair structure, has further promoted this infrared light fingerprint identification sensor 102's steadiness and job stabilization nature.
Example 4
Fig. 6 is a structural view of a backlight module according to embodiment 4 of the present invention. Only the differences between embodiment 4 and embodiment 2 will be described below, and the descriptions of the similarities are omitted here.
This light guide plate 230 is provided with groove structure, and this infrared light fingerprint identification sensor 102 gomphosis sets up on this groove structure, has further promoted this infrared light fingerprint identification sensor 102's steadiness and job stabilization nature.
Example 5
Fig. 7 is a structural view of a backlight module according to embodiment 5 of the present invention. Only the differences between embodiment 5 and embodiment 2 will be described below, and the descriptions of the similarities will be omitted.
This light guide plate 230 is provided with hollow out construction, and this infrared light fingerprint identification sensor 102 gomphosis sets up on this hollow out construction, has further promoted this infrared light fingerprint identification sensor 102's steadiness and job stabilization nature.
While the invention has been described above with reference to certain embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the various embodiments disclosed herein can be used in any combination with one another, and the description of such combinations is not exhaustive for reasons of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. A backlight module, comprising:
an LED light source;
the optical film group comprises a light guide plate arranged on one side of the LED light source, a diffusion film arranged above the light guide plate, a prism sheet arranged above the diffusion film, and a reflecting sheet arranged below the light guide plate;
the infrared light fingerprint identification sensor is arranged above the LED light source;
the infrared light fingerprint identification sensor is arranged adjacent to the optical diaphragm group.
2. A backlight module according to claim 1, wherein: the upper surface of the infrared light fingerprint identification sensor is flush with the upper surface of the optical diaphragm group.
3. A backlight module according to claim 2, wherein: the infrared light fingerprint identification sensor is arranged above the light guide plate and connected with the light guide plate.
4. A backlight module according to claim 3, wherein: the light guide plate is provided with a step structure, and the infrared light fingerprint identification sensor is embedded and arranged on the step structure.
5. A backlight module according to claim 3, wherein: the light guide plate is provided with groove structure, infrared light fingerprint identification sensor gomphosis sets up on the groove structure.
6. A backlight module according to claim 3, wherein: the light guide plate is provided with hollow out construction, infrared light fingerprint identification sensor gomphosis sets up on the hollow out construction.
7. A backlight module according to claim 2, wherein: the infrared light fingerprint identification sensor is arranged above the diffusion film and is connected with the diffusion film; or the infrared light fingerprint identification sensor is arranged above the prism sheet and connected with the prism sheet.
8. A backlight module according to claim 1, wherein: the backlight module also comprises an infrared light illuminator used for emitting infrared light and sensing and identifying biological fingerprint information; and an infrared transparent shading layer is arranged above the infrared light fingerprint identification sensor.
9. A backlight module according to any of claims 1-8, characterized in that: the backlight module further comprises a rubber frame, and the rubber frame is used for fixedly connecting the LED light source, the optical film group and the infrared light fingerprint identification sensor; the backlight module further comprises shading glue, and the shading glue is used for bonding the LED light source, the optical diaphragm group and the infrared light fingerprint identification sensor and reducing light leakage of the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921405702.2U CN210803918U (en) | 2019-08-27 | 2019-08-27 | Fingerprint identification backlight unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921405702.2U CN210803918U (en) | 2019-08-27 | 2019-08-27 | Fingerprint identification backlight unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210803918U true CN210803918U (en) | 2020-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921405702.2U Withdrawn - After Issue CN210803918U (en) | 2019-08-27 | 2019-08-27 | Fingerprint identification backlight unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN210803918U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110515238A (en) * | 2019-08-27 | 2019-11-29 | 深圳市隆利科技股份有限公司 | Fingerprint recognition backlight module and electronic equipment |
-
2019
- 2019-08-27 CN CN201921405702.2U patent/CN210803918U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110515238A (en) * | 2019-08-27 | 2019-11-29 | 深圳市隆利科技股份有限公司 | Fingerprint recognition backlight module and electronic equipment |
| CN110515238B (en) * | 2019-08-27 | 2024-04-16 | 深圳市隆利科技股份有限公司 | Fingerprint identification backlight unit and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200619 Effective date of abandoning: 20240416 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200619 Effective date of abandoning: 20240416 |