CN100489942C - Light source driving device with photosensitive module and electronic device using same - Google Patents
Light source driving device with photosensitive module and electronic device using same Download PDFInfo
- Publication number
- CN100489942C CN100489942C CNB2006100339529A CN200610033952A CN100489942C CN 100489942 C CN100489942 C CN 100489942C CN B2006100339529 A CNB2006100339529 A CN B2006100339529A CN 200610033952 A CN200610033952 A CN 200610033952A CN 100489942 C CN100489942 C CN 100489942C
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- light source
- circuit board
- drive device
- source drive
- plastic packaging
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Abstract
The invention relates to a light-driven device with a photographic module, which is used to drive light source. The light-driven device includes a circuit board and a photographic module. The photographic module locates on the surface of the circuit board, and electrical connects with the circuit board, and the photographic module includes a chip board, a molded plastic colloid and a photographic chip. The chip board electrical connects with the circuit board. The molded plastic colloid includes an upper and lower molded plastic colloid which is symmetric in both upper and lower side of the chip board. The photographic chip electrical connects with the chip board, and it is coated by the upper molded plastic colloid.
Description
[technical field]
The present invention relates to a kind of light source drive device, relate in particular to a kind of light source drive device with illuminant module.
[background technology]
At present, most of portable electric appts, as: mobile computer, personal digital assistant (personal digital assistance, PDA) etc., all have LCD (liquid crystaldisplay) panel, this kind panel uses the fluorescent tube of discharge lamp (discharge lamp) or other type as backlight usually.Therefore, the LCD panel needs a backlight control equipment to light the interior fluorescent tube of LCD panel, and keeps and regulate the brightness of LCD panel, and its brightness is changed along with the variation of ambient brightness, saves power supply energy.
Usually, the LCD panel utilizes a photosensitive device sensitive context brightness respectively, and the brightness of the brightness regulation LCD panel that senses according to photosensitive device of a light source drive device.In this kind LCD panel, two of photosensitive device and light source drive devices are independently of one another, not only take than large space, cause the electronic equipment volume bigger, can't miniaturization, and have higher cost.
[summary of the invention]
In view of this, need provide a kind of light source drive device, it is integrated in one with illuminant module, saves the space, saves cost.
A kind of light source drive device with illuminant module is used for driving light source, and light source drive device comprises circuit board and illuminant module.Illuminant module is positioned at the surface of circuit board, and electrically connects with circuit board, and it comprises chip support plate, plastic packaging colloid and sensitive chip.Chip support plate and circuit board are electrical connected.The plastic packaging colloid comprises upside plastic packaging colloid and downside plastic packaging colloid, and symmetry is positioned at the both sides up and down of chip support plate respectively.The material of plastic packaging colloid is a light-transmitting materials.Sensitive chip is electrically connected at chip support plate.
A kind of electronic equipment comprises panel and light source drive device, and described panel has photosensitive window.Wherein, light source drive device comprises circuit board and illuminant module.Illuminant module is positioned at the surface of circuit board, and electrically connects with circuit board.Illuminant module comprises chip support plate, sensitive chip and plastic packaging colloid.Chip support plate and circuit board are electrical connected, and sensitive chip is electrically connected at chip support plate.The plastic packaging colloid comprises upside plastic packaging colloid and downside plastic packaging colloid, and symmetry is positioned at the both sides up and down of chip support plate respectively.The material of plastic packaging colloid is a light-transmitting materials.Photosensitive window is corresponding to the sensitive chip of illuminant module.
The present invention is integrated in illuminant module in the light source drive device, not only saves the space, uses its electronic equipment volume to diminish, and has also reduced cost.
[description of drawings]
Fig. 1 is the sectional view of circuit board in the light source drive device of first embodiment of the invention.
Fig. 2 is the applied environment figure of Fig. 1 of the present invention.
Fig. 3 is the sectional view of circuit board in the light source drive device of second embodiment of the invention.
Fig. 4 is the applied environment figure of Fig. 3 of the present invention.
Fig. 5 is the sectional view of circuit board in the light source drive device of third embodiment of the invention.
[embodiment]
Fig. 1 is the sectional view of circuit board 11 in the first embodiment of the invention light source drive device 10, and light source drive device 10 comprises circuit board 11, illuminant module 12 and at least one electronic component 13.Circuit board 11 has upper surface 11A and lower surface 11B.Illuminant module 12 is positioned at the upper surface 11A of circuit board, and electrically connects with circuit board 11, and illuminant module 12 comprises chip support plate 120, sensitive chip 121, plastic packaging colloid 122 and at least one pair of pin 123.
The chip support plate 120 and the circuit board 11 of illuminant module 12 are electrical connected, and it carries sensitive chip 121 thereon, and in the present embodiment, chip support plate 120 can be substrate or lead frame.Plastic packaging colloid 122 comprises upside plastic packaging colloid 122A and downside plastic packaging colloid 122B, lay respectively at the both sides up and down of chip support plate 120, in the present embodiment, be positioned at chip support plate 120 top plastic packaging colloids 122 and be defined as upside plastic packaging colloid 122A, be positioned at the below of chip support plate 120, and the plastic packaging colloid 122 between chip support plate 120 and circuit board 11 is defined as downside plastic packaging colloid 122B, itself and upside plastic packaging colloid 122A position opposite.In the present embodiment, the plastic packaging colloid 122 that upside plastic packaging colloid 122A and downside plastic packaging colloid 122B are formed in one, and the material of plastic packaging colloid 122 is a light-transmitting materials.
In the present embodiment, sensitive chip 121 is electrically connected at this chip support plate 120, and is positioned at the top of chip support plate 120, is promptly coated by upside plastic packaging colloid 122A.Pin 123 is electrically connected to circuit board 11 with chip support plate 120, and each pin 123 has an exit A and an incoming end B.In the present embodiment, pin 123 is curved shape, and its exit A and chip support plate 120 be electrical connected, and its incoming end B and circuit board 11 are electrical connected.Electronic component 13 is other circuit component in the light source drive device 10, as: control integrated circuit (integrated circuit, IC), resistance, electric capacity, transformer etc., itself and circuit board 11 are electrical connected, and the height of electronic component 13 can also be lower than the height of illuminant module 12 greater than the height of illuminant module 12.
In the present embodiment, electronic component 13 and illuminant module 12 all are positioned at the same one side of circuit board 11, i.e. the upper surface 11A of circuit board 11, and the height of electronic component 13 is greater than the height of illuminant module 12.Again, in the present embodiment, illuminant module 12 is defined as the front illuminant module, and promptly illuminant module 12 comes sensitive context brightness with circuit board upper surface 11A.
Figure 2 shows that the applied environment figure of Fig. 1 light source drive device 10 of the present invention.In the present embodiment, light source drive device 10 can be applicable in LCD (LCD) panel 21 of a mobile computer 20, be used to drive the backlight of LCD, for example: therefore the fluorescent tube of discharge lamp (dischargelamp) or other type can make the light source igniting in the LCD panel 21.Light source drive device 10 is positioned at the rear of LCD panel 21, and the below of close LCD panel 21, and the upper surface 11A of circuit board is near this LCD panel 21.LCD panel 21 comprises photosensitive window 22, and it is positioned at panel 21 belows, and corresponding to the sensitive chip 121 of the illuminant module 12 of light source drive device 10.In the present embodiment, photosensitive window 22 is a windowpane, and in other embodiment of the present invention, photosensitive window 22 also can be other light-transmitting materials.
Because in other words the height of electronic component 13, leaves certain distance between illuminant module 12 and the LCD panel 21 greater than the height of illuminant module 12,, between LCD panel 21 and illuminant module 12, add leaded light post 23 for well sensitization.Therefore, the sensitive chip 121 in the illuminant module 12 can see through the variation of photosensitive window 23 and the 23 sensitive context brightness of leaded light post, thereby driving light source drive unit 10 is regulated the brightness of LCD panel 21 according to the ambient brightness that senses.
Figure 3 shows that the sectional view of circuit board 31 in the second embodiment of the invention light source drive device 30, the light source drive device 30 and the light source drive device shown in Figure 1 10 of present embodiment are basic identical, difference is: in the present embodiment, sensitive chip 321 is electrically connected at chip support plate 320, and between chip support plate 320 and circuit board 31, and coated by downside plastic packaging colloid 322B.In other words, the illuminant module 32 of present embodiment is back side sensitization, and promptly illuminant module 32 comes sensitive context brightness by circuit board lower surface 31B.In circuit board 31, have photographic hole 34, make sensitive chip 321 can see through the outside brightness of photographic hole 34 sensings with respect to the position of sensitive chip 321.In the present embodiment, the size of photographic hole 34 gets final product for light being transmitted through sensitive chip 321 from circuit board lower surface 31B.
Figure 4 shows that the applied environment figure of Fig. 3 light source drive device 30 of the present invention.The applied environment of present embodiment and Fig. 1 light source drive device 10 is basic identical, and the circuit board lower surface 31B that difference is light source drive device 30 is near this LCD panel 41, and the surface of promptly not having element is near LCD panel 41.Equally, have photosensitive window 42 below LCD panel 41, its position is just corresponding to photographic hole 34.Because circuit board lower surface 31B does not have any electronic component, then circuit board lower surface 31B abuts against with LCD panel 41, so sensitive chip 321 can directly see through photographic hole 34 sensitization.
Figure 5 shows that the sectional view of circuit board 51 in the second embodiment of the invention light source drive device 50, the light source drive device 30 of itself and Fig. 3 is basic identical, difference is: in the present embodiment, except photographic hole 54A, also comprise another photographic hole 54B among the downside plastic packaging colloid 522B, its corresponding setting with photographic hole 54A.In other words, in the present embodiment, but sensitive chip 521 need not see through the 522 direct sensing external environment condition brightness of plastic packaging colloid.And the applied environment figure of present embodiment is identical with Fig. 4, does not repeat them here.
Light source drive device of the present invention is integrated in one with illuminant module, can not only save the space by front or back side sensitization, uses its electronic equipment volume to diminish, and reduces cost.
Claims (10)
1. the light source drive device with illuminant module is used for driving light source, it is characterized in that comprising:
Circuit board; And
Illuminant module is positioned at the surface of circuit board, and electrically connects with circuit board, comprising:
Chip support plate is electrical connected with circuit board;
Sensitive chip is electrically connected at chip support plate; And
The plastic packaging colloid comprises upside plastic packaging colloid and downside plastic packaging colloid, and symmetry is positioned at the both sides up and down of chip support plate respectively, and the material of described plastic packaging colloid is a light-transmitting materials.
2. light source drive device as claimed in claim 1 is characterized in that described illuminant module comprises at least one pair of pin, is electrically connected to circuit board with chip support plate.
3. light source drive device as claimed in claim 1 is characterized in that described sensitive chip is electrically connected at chip support plate, and is coated by downside plastic packaging colloid.
4. light source drive device as claimed in claim 3 is characterized in that also comprising first photographic hole, is formed in the circuit board corresponding setting with sensitive chip.
5. light source drive device as claimed in claim 4 is characterized in that described downside plastic packaging colloid comprises second photographic hole, corresponding setting with first photographic hole.
6. light source drive device as claimed in claim 1 is characterized in that described sensitive chip is electrically connected at chip support plate, and is coated by upside plastic packaging colloid.
7. light source drive device as claimed in claim 1 is characterized in that described chip support plate is substrate or lead frame.
8. electronic equipment is characterized in that comprising panel, as each described light source drive device of claim 1 to 7, and wherein said panel has photosensitive window, and described photosensitive window is corresponding to the sensitive chip of illuminant module.
9. electronic equipment as claimed in claim 8 is characterized in that also comprising the leaded light post, between panel and illuminant module, is used to guide extraneous light to illuminant module.
10. electronic equipment as claimed in claim 8, the material that it is characterized in that described photosensitive window is a light-transmitting materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100339529A CN100489942C (en) | 2006-02-24 | 2006-02-24 | Light source driving device with photosensitive module and electronic device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100339529A CN100489942C (en) | 2006-02-24 | 2006-02-24 | Light source driving device with photosensitive module and electronic device using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101025894A CN101025894A (en) | 2007-08-29 |
| CN100489942C true CN100489942C (en) | 2009-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100339529A Expired - Fee Related CN100489942C (en) | 2006-02-24 | 2006-02-24 | Light source driving device with photosensitive module and electronic device using same |
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| Country | Link |
|---|---|
| CN (1) | CN100489942C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI567717B (en) | 2015-01-23 | 2017-01-21 | 明基電通股份有限公司 | Sensing device for sensing light intensity of a panel module and panel apparatus therewith |
| CN104715681B (en) * | 2015-02-12 | 2017-07-28 | 明基电通有限公司 | For the induction installation and face equipment of the backlight intensity for detecting panel module |
| CN111193852B (en) * | 2016-03-28 | 2021-10-15 | 宁波舜宇光电信息有限公司 | Camera module and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1278676A (en) * | 1999-06-22 | 2001-01-03 | 京瓷株式会社 | Information terminal apparatus setted with background light |
| CN1652340A (en) * | 2004-02-03 | 2005-08-10 | 旺宏电子股份有限公司 | Light sensitive chip packaging structure |
-
2006
- 2006-02-24 CN CNB2006100339529A patent/CN100489942C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1278676A (en) * | 1999-06-22 | 2001-01-03 | 京瓷株式会社 | Information terminal apparatus setted with background light |
| CN1652340A (en) * | 2004-02-03 | 2005-08-10 | 旺宏电子股份有限公司 | Light sensitive chip packaging structure |
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| Publication number | Publication date |
|---|---|
| CN101025894A (en) | 2007-08-29 |
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Granted publication date: 20090520 Termination date: 20140224 |