CN201129644Y - LED back light module unit used for electronic clinical thermometer and ear temperature gun - Google Patents

LED back light module unit used for electronic clinical thermometer and ear temperature gun Download PDF

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Publication number
CN201129644Y
CN201129644Y CNU2007201944576U CN200720194457U CN201129644Y CN 201129644 Y CN201129644 Y CN 201129644Y CN U2007201944576 U CNU2007201944576 U CN U2007201944576U CN 200720194457 U CN200720194457 U CN 200720194457U CN 201129644 Y CN201129644 Y CN 201129644Y
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CN
China
Prior art keywords
led
pcb
led illuminator
lgp
thermometer
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CNU2007201944576U
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Chinese (zh)
Inventor
陈文光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AMPEROR ELECTRONICS (SHENZHEN) Co Ltd
Original Assignee
AMPEROR ELECTRONICS (SHENZHEN) Co Ltd
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
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Priority to CNU2007201944576U priority Critical patent/CN201129644Y/en
Application granted granted Critical
Publication of CN201129644Y publication Critical patent/CN201129644Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a LED backlight module for electric thermometer and ear thermometer, which comprises a first PCB for connecting a power supply, a light guide plate provided on the first PCB, a diffusion plate on the light guide plate, a reflection plate between the first PCB and the light guide plate, whose reflection face is toward the light guide plate, a second PCB fixed at the side of the light guide plate and at least one LED luminophor toward the side end of the light guide plate and connected into the second PCB, wherein the LED luminophor is provided with an exposed connector fixed on the second PCB, and the connector is welded with the first PCB for electric conduction. The utility model has simple production, the LED luminphor is hard to drop from the PCB, the light guide plate is positioned accurately, and the utility model can save production cost and volume.

Description

The LED-backlit module that is used for electronic thermometer and ear thermometer
[technical field]
The utility model relates to a kind of module backlight, refer in particular to a kind of be used for electronic thermometer and ear thermometer light emitting diode (Light Emitting Diode; LED) module backlight.
[background technology]
Liquid crystal indicator has that energy consumption is low, volume is little, in light weight, plurality of advantages such as radiation is low, it is widely used in various types of electronic products, for example electronic thermometer and ear thermometer etc., because liquid crystal panel itself does not have emitting characteristics, so, need configuration module backlight on the liquid crystal panel bottom surface, just can reach full color display effect.
The common LED-backlit module that is applied to electronic thermometer and ear thermometer includes a reflector and the printed circuit board (PCB) that is used to insert external power source that is connected with the LED illuminator (the Printed Circuit Board that astigmatism plate, that a LGP, at least one LED illuminator, that is arranged at the LGP side be arranged at the LGP top is arranged at the LGP below; PCB).
At the existing LED-backlit modular structure that is used for electronic thermometer and ear thermometer, exist shortcoming as described below: 1, the LED illuminator is realized electric connection with PCB by wire bonds, and the use wire bonds, must increase the operation of manual sorting lead, and the situation that exists the lead solder joint to come off easily; 2, the LGP in the LED-backlit module is not provided with location structure, causes it accurately not locate with PCB, and is unfavorable for that LGP firmly is arranged on the PCB.
[summary of the invention]
The purpose of this utility model is to overcome the existing defective of common LED-backlit module, provide that a kind of production procedure is easy, the LED illuminator is difficult for coming off with PCB, the LGP location accurately and can save the LED-backlit module that is used for electronic thermometer and ear thermometer of production cost and product space.
The purpose of this utility model is achieved in that a kind of LED-backlit module that is used for electronic thermometer and ear thermometer, include a PCB who is used to connect power supply, one is installed on the LGP on the described PCB, one is arranged at the diffuser plate on the described LGP, one be arranged between a described PCB and the described LGP and its reflecting surface toward the reflecting plate of described LGP, one is fixed in the 2nd PCB of the side of described LGP, and at least one towards described LGP the side end face and connect into the LED illuminator of described the 2nd PCB, described LED illuminator leads to the splicing ear that exposes and be fixed in described the 2nd PCB, and described splicing ear is welded in a described PCB and realizes electrically conducting.
The above-mentioned LED-backlit module that is used for electronic thermometer and ear thermometer, other side end faces except that the side end face that is provided with described LED illuminator of stating LGP are provided with the reflection bar of reflecting surface toward described LGP.
The above-mentioned LED-backlit module that is used for electronic thermometer and ear thermometer, be formed with at least one first keeper on the lower surface of described LGP, a described PCB goes up corresponding to described first keeper and is formed with second keeper that cooperates with it, and described first keeper is connected in described second keeper.
The above-mentioned LED-backlit module that is used for electronic thermometer and ear thermometer is formed with at least one reference column on the lower surface of described LGP, a described PCB goes up and is formed with locating hole corresponding to described reference column, and described reference column is inserted among the described locating hole.
The above-mentioned LED-backlit module that is used for electronic thermometer and ear thermometer, the quantity of the formed reference column of described LGP is two, the quantity of the formed locating hole of a described PCB is two.
The above-mentioned LED-backlit module that is used for electronic thermometer and ear thermometer, described LED illuminator comprise at least two kinds of LED illuminators in red-light LED illuminator, yellow light LED illuminator, green light LED illuminator and the blue-ray LED illuminator.
Than common LED-backlit module, the beneficial effects of the utility model are: the set LED illuminator of LED-backlit module leads to the splicing ear that exposes and be fixed in the 2nd PCB, splicing ear is welded in a PCB and realizes electrically conducting, changed that the lead solder joint that existing LED-backlit module adopts LED illuminator and the PCB structure by wire bonds to exist comes off easily, the defective of need manual sorting lead, production procedure that can easy LED module, and be not prone to the situation that LED illuminator and a PCB are separated; Be formed with reference column on the lower surface of LGP, a PCB goes up and is formed with locating hole corresponding to reference column, by both plugging, can realize that LGP firmly also accurately is positioned on the PCB; According to the principle of synthetic light, adopt two or three or four LED illuminators and can produce the light of multiple different colours, so can, the use amount of minimizing LED illuminator helps the reduction of production cost of LED-backlit module and the saving of structure space.
[description of drawings]
Below in conjunction with drawings and Examples the utility model is described further.
Fig. 1 is a plan structure schematic diagram of the present utility model.
Fig. 2 is a side-looking structural representation of the present utility model.
Fig. 3 is a decomposition texture schematic diagram of the present utility model.
[specific embodiment]
Referring to figs. 1 to shown in Figure 3, the LED-backlit module that is used for electronic thermometer and ear thermometer disclosed in the utility model includes one the one PCB10, a LGP 20, a diffuser plate 30, a reflecting plate 40, at least one LED illuminator 50, one the 2nd PCB60 and a reflection bar 70, wherein, the one PCB10 is used to connect external power source, and provides driving power for the LED illuminator 50 that electrically connects with it; LGP 20 is installed on the PCB10, and it can adopt polymethyl methacrylate (Polymethyl Methacrylate; PMMA) preparation is used for the light that scattering LED illuminator 50 is launched; Diffuser plate 30 be arranged at LGP 20 above, it is used to spread the light that penetrates from LGP 20, thereby is the suitable back light of liquid crystal panel; Reflecting plate 40 is arranged between a PCB10 and the LGP 20, and its reflecting surface is toward LGP 20, is used for light reflected back LGP 20 that LED illuminator 50 is launched, to improve the utilization rate of light source, promotes the brightness of back light; LED illuminator 50 is towards the side end face of LGP 20 and connect into the 2nd PCB60, the 2nd PCB60 is fixed on the side of LGP 20, LED illuminator 50 leads to the splicing ear 500 that exposes and be fixed in the 2nd PCB60, splicing ear 500 is welded in a PCB10 and realizes electrically conducting, thereby can be that LED illuminator 50 obtains driving power via a PCB10; Reflection bar 70 is arranged at other side end faces except that the side end face that is provided with LED illuminator 50 of LGP 20, and its reflecting surface is used for light reflected back LGP 20 toward LGP 20, to improve the utilization rate of light source.
The set LED illuminator 50 of LED-backlit module leads to the splicing ear 500 that exposes and be fixed in the 2nd PCB60, splicing ear 500 is welded in a PCB10 and realizes electrically conducting, changed that the lead solder joint that existing LED-backlit module adopts LED illuminator and the PCB structure by wire bonds to exist comes off easily, the defective of need manual sorting lead, production procedure that can easy LED module, and be not prone to the situation that LED illuminator 50 and a PCB10 are separated.
Be formed with two reference columns 200 on the lower surface of LGP 20, the one PCB10 goes up and is formed with two locating holes 100 corresponding to two reference columns 200, two reference columns 200 are inserted in respectively among two locating holes 100, thereby realization LGP 20 can be firmly and accurately is positioned on the PCB10.The quantity of the formed reference column 200 in LGP 20 lower surfaces is not limited to two, and its quantity can be one, also can be three, but comparatively suitable with two.Really, also can adopt the location structure of other types to realize that LGP 20 is positioned on the PCB10, for example, forms a hook joint spare in the lower surface of LGP 20, and on a PCB10, form a hook joint position, the location of realizing LGP 20 by both hook joints.
The set LED illuminator 50 of LED-backlit module is two, comprises a red-light LED illuminator and a green light LED illuminator, and two LED illuminators are lighted separately respectively and can be produced ruddiness and green glow, and both light simultaneously and can synthesize the generation sodium yellow.
In another embodiment, the set LED illuminator 50 of LED-backlit module is two, comprise a red-light LED illuminator and a blue-ray LED illuminator, two LED illuminators are lighted separately respectively and can be produced ruddiness and blue light, and both light simultaneously and can synthesize the pinkish red coloured light of generation.
In another embodiment, the set LED illuminator 50 of LED-backlit module is two, comprise a green light LED illuminator and a blue-ray LED illuminator, two LED illuminators are lighted separately respectively and can be produced green glow and blue light, and both light simultaneously and can synthesize the generation cyan light.
In another embodiment, the set LED illuminator 50 of LED-backlit module is three, comprise a red-light LED illuminator, a green light LED illuminator and a blue-ray LED illuminator, three LED illuminators are lighted separately respectively and can be produced ruddiness, green glow and blue light, the three lights simultaneously and can synthesize the generation white light, any two situations that the LED illuminator is lighted are simultaneously described to some extent at preamble.
In another embodiment, the set LED illuminator 50 of LED-backlit module is four, comprise a red-light LED illuminator, a green light LED illuminator, a yellow light LED illuminator and a blue-ray LED illuminator, can produce the light of different colours by the LED illuminator of lighting wherein any amount combination.
According to the principle of synthetic light, adopt two or three LED illuminators and can produce the light of multiple different colours, so can, the use amount of minimizing LED illuminator helps the reduction of production cost of LED-backlit module and the saving of structure space.

Claims (8)

1. LED-backlit module that is used for electronic thermometer and ear thermometer, it is characterized in that: described LED-backlit module includes a PCB who is used to connect power supply, one is installed on the LGP on the described PCB, one is arranged at the diffuser plate on the described LGP, one be arranged between a described PCB and the described LGP and its reflecting surface toward the reflecting plate of described LGP, one is fixed in the 2nd PCB of the side of described LGP, and at least one towards described LGP the side end face and connect into the LED illuminator of described the 2nd PCB, described LED illuminator leads to the splicing ear that exposes and be fixed in described the 2nd PCB, and described splicing ear is welded in a described PCB and realizes electrically conducting.
2. the LED-backlit module that is used for electronic thermometer and ear thermometer as claimed in claim 1 is characterized in that: other side end faces except that the side end face that is provided with described LED illuminator of described LGP are provided with the reflection bar of reflecting surface toward described LGP.
3. the LED-backlit module that is used for electronic thermometer and ear thermometer as claimed in claim 1 or 2, it is characterized in that: be formed with at least one first keeper on the lower surface of described LGP, a described PCB goes up corresponding to described first keeper and is formed with second keeper that cooperates with it, and described first keeper is connected in described second keeper.
4. the LED-backlit module that is used for electronic thermometer and ear thermometer as claimed in claim 1 or 2, it is characterized in that: be formed with at least one reference column on the lower surface of described LGP, a described PCB goes up and is formed with locating hole corresponding to described reference column, and described reference column is inserted among the described locating hole.
5. the LED-backlit module that is used for electronic thermometer and ear thermometer as claimed in claim 4 is characterized in that: the quantity of the formed reference column of described LGP is two, and the quantity of the formed locating hole of a described PCB is two.
6. the LED-backlit module that is used for electronic thermometer and ear thermometer as claimed in claim 1 or 2 is characterized in that: described LED illuminator comprises at least two kinds of LED illuminators in red-light LED illuminator, yellow light LED illuminator, green light LED illuminator and the blue-ray LED illuminator.
7. the LED-backlit module that is used for electronic thermometer and ear thermometer as claimed in claim 4 is characterized in that: described LED illuminator comprises at least two kinds of LED illuminators in red-light LED illuminator, yellow light LED illuminator, green light LED illuminator and the blue-ray LED illuminator.
8. the LED-backlit module that is used for electronic thermometer and ear thermometer as claimed in claim 5 is characterized in that: described LED illuminator comprises at least two kinds of LED illuminators in red-light LED illuminator, yellow light LED illuminator, green light LED illuminator and the blue-ray LED illuminator.
CNU2007201944576U 2007-12-07 2007-12-07 LED back light module unit used for electronic clinical thermometer and ear temperature gun Expired - Fee Related CN201129644Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007201944576U CN201129644Y (en) 2007-12-07 2007-12-07 LED back light module unit used for electronic clinical thermometer and ear temperature gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007201944576U CN201129644Y (en) 2007-12-07 2007-12-07 LED back light module unit used for electronic clinical thermometer and ear temperature gun

Publications (1)

Publication Number Publication Date
CN201129644Y true CN201129644Y (en) 2008-10-08

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Application Number Title Priority Date Filing Date
CNU2007201944576U Expired - Fee Related CN201129644Y (en) 2007-12-07 2007-12-07 LED back light module unit used for electronic clinical thermometer and ear temperature gun

Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105005110A (en) * 2015-07-17 2015-10-28 康佳集团股份有限公司 Quantum dot light guide plate, backlight module, and liquid crystal television
WO2018157603A1 (en) * 2017-03-01 2018-09-07 京东方科技集团股份有限公司 Light guide plate, backlight source, and display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105005110A (en) * 2015-07-17 2015-10-28 康佳集团股份有限公司 Quantum dot light guide plate, backlight module, and liquid crystal television
WO2018157603A1 (en) * 2017-03-01 2018-09-07 京东方科技集团股份有限公司 Light guide plate, backlight source, and display device

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20081008

Termination date: 20151207

EXPY Termination of patent right or utility model