CN104507215A - Device and method for lighting and detecting LED (Light Emitting Diode) module - Google Patents
Device and method for lighting and detecting LED (Light Emitting Diode) module Download PDFInfo
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- CN104507215A CN104507215A CN201410734914.0A CN201410734914A CN104507215A CN 104507215 A CN104507215 A CN 104507215A CN 201410734914 A CN201410734914 A CN 201410734914A CN 104507215 A CN104507215 A CN 104507215A
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Abstract
The invention discloses a device and a method for lighting and detecting an LED (Light Emitting Diode) module. The device comprises a Boost constant voltage output circuit, a Boost voltage circuit, a constant current circuit, a voltage acquisition circuit and a controller, wherein the Boost constant voltage output circuit is electrically connected with an anode of the LED module; the Boost voltage circuit is electrically connected with the anode of the LED module; the constant current circuit is electrically connected with a cathode of the LED module; the voltage acquisition circuit is electrically connected with the LED module; the output end of the controller is electrically connected with the input ends of the Boost constant voltage output circuit, the Boost voltage circuit and the constant current circuit, and the input end of the controller is electrically connected with the output end of the voltage acquisition circuit. According to the device, the Boost voltage circuit supplies voltage to the LED module; when the LED module is pulled out, a self-locking circuit is triggered, the Boost voltage circuit is switched off, the Boost constant voltage output circuit outputs voltage to judge whether the LED module is communicated, the burn-down of the LED module caused by over-high current in a circuit when the LED module is pulled out is avoided, and the LED module can be lighted and detected.
Description
Technical field
The invention belongs to LED Driving technique, be specifically related to a kind of LED module and light checkout gear and light detection method.
Background technology
At present, lighting of LED module mainly contains following two kinds of patterns with detection method: one is be connected with the positive pole of LED module higher than the voltage source of LED module with one, the negative pole of LED module is connected with constant-current circuit, the voltage that the voltage of voltage source deducts LED module is eaten up by the MOS of constant-current circuit, triode or resistance, this circuit simple but light LED module voltage range less, cost is relatively high; Two is adopt BOOST from booster circuit, automatic boosting after circuit powers on, progressively increase wait the voltage being added in LED module and LED module is lighted and namely feeds back signal to boost chip after meeting the voltage conditions of constant-current circuit to stop boosting, the voltage range that this circuit lights LED strip is wider, cost is low, but circuit relative complex.
Two kinds of above-mentioned patterns all can carry out normally lighting of LED module, in actual use can owing to affecting man-hour by startup stop key frequently or can warm swap be caused because the binding post of LED module loosens in the test process of reality but LED detects streamline, the plug of band point can because the voltage fluctuation of voltage fluctuation or LED module positive pole causes the voltage being added in LED module two ends to change on metal-oxide-semiconductor, because the size of the electric current of LED module is directly proportional to the voltage swing being added in two ends, larger current spikes can be formed, thus puncture LED module.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of LED module and light checkout gear and light detection method.
In order to achieve the above object, technical scheme of the present invention is as follows:
The invention provides a kind of LED module and light checkout gear, comprising:
Boost determines voltage follower circuit, and its output is electrically connected with the positive pole of LED module, for providing voltage for LED module;
Boost potential circuit, its output is electrically connected with the positive pole of LED module, for providing voltage for LED module;
Constant-current circuit, its input is connected with the negative electricity of LED module;
Voltage collection circuit, its positive pole with LED module, negative electricity are connected, for gathering the voltage at LED module two ends;
Controller, the input that its output and Boost determine voltage follower circuit, Boost potential circuit and constant-current circuit is electrically connected, and its input is electrically connected with the output of voltage collection circuit.
In the present invention, Boost potential circuit comprises connected Boost circuit and D/A module, and the output of Boost circuit is electrically connected with the positive pole of LED-backlit module, and D/A module is electrically connected with the output of controller.
On the basis of technique scheme, also can do following improvement:
As preferred scheme, be also provided with the mount pad for installing LED module.
As preferred scheme, also arrange latching circuit, its input is electrically connected with the output of constant-current circuit, and its output is electrically connected with the input of controller.
The present invention also provides a kind of LED module to light detection method, comprising:
Boost determines voltage follower circuit and closes, the ascending rising of voltage of controller control Boost potential circuit until when LED module is lighted Boost potential circuit stop voltage rise, meanwhile, voltage collection circuit gathers the magnitude of voltage of LED module negative pole and sends controller to and record LED ignition voltage value now; Equipment lights LED module direct for the second time fast with the parameter recorded, as long as carry out once lighting of this pattern after changing the LED module of different size; .
As preferred scheme, also comprise:
When LED module is extracted, latching circuit transmits latch signal to controller, and controller drives Boost potential circuit to cut out and drives Boost to determine voltage follower circuit and applies voltage to LED module;
Voltage collection circuit gathers the magnitude of voltage of LED module positive pole and sends controller to and compare, if it is identical that the magnitude of voltage that voltage collection circuit gathers and Boost determine the magnitude of voltage that voltage follower circuit exports, then judge that LED module disconnects, if the magnitude of voltage that voltage collection circuit gathers is within the scope of LED ignition voltage, then judge that LED module is communicated with and lights LED module by controller.
When in the present invention, LED module is communicated with, Boost potential circuit provides ascending raised voltage for LED module, realizes LED module and lights; When LED module is extracted, trigger latching circuit, disconnect Boost potential circuit, startup Boost determines voltage follower circuit output voltage and judges whether LED module is communicated with simultaneously, when avoiding LED module to extract, in circuit, electric current is excessive burns LED module, realizes lighting and detecting of LED module.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of one embodiment of the present invention.
Fig. 2 is the structured flowchart of another embodiment of the present invention.
Embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
In order to reach object of the present invention, as shown in Figure 1, in wherein a kind of execution mode of the present invention, provide a kind of LED module to light checkout gear, comprising:
Boost determines voltage follower circuit, and its output is electrically connected with the positive pole of LED module, for providing voltage for LED module;
Boost potential circuit, its output is electrically connected with the positive pole of LED module, for providing voltage for LED module;
Constant-current circuit, its input is connected with the negative electricity of LED module;
Voltage collection circuit, its positive pole with LED module, negative electricity are connected, for gathering the voltage at LED module two ends;
Controller, the input that its output and Boost determine voltage follower circuit, Boost potential circuit and constant-current circuit is electrically connected, and its input is electrically connected with the output of voltage collection circuit.
In present embodiment, Boost potential circuit comprises connected Boost circuit and D/A module, and the output of Boost circuit is electrically connected with the positive pole of LED-backlit module, and D/A module is electrically connected with the output of controller.
Present embodiment also provides a kind of LED module to light detection method, comprising:
Boost determines voltage follower circuit and closes, the ascending rising of voltage of controller control Boost potential circuit until when LED module is lighted Boost potential circuit stop voltage rise, meanwhile, voltage collection circuit gathers the magnitude of voltage of LED module negative pole and sends controller to and record LED ignition voltage value now; Equipment lights LED module direct for the second time fast with the parameter recorded, as long as carry out once lighting of this pattern after changing the LED module of different size.
When in present embodiment, LED module is communicated with, Boost potential circuit provides ascending raised voltage for LED module, realizes LED module and lights.
As shown in Figure 2, in order to optimize implementation result of the present invention further, in another embodiment of the invention, on the basis of foregoing teachings, also be provided with the mount pad for installing LED module and latching circuit, the input of latching circuit is electrically connected with the output of constant-current circuit, and the output of latching circuit is electrically connected with the input of controller.
Present embodiment also provides a kind of LED module to light detection method, comprising:
Step one, Boost determines voltage follower circuit and closes, the ascending rising of voltage of controller control Boost potential circuit until when LED module is lighted Boost potential circuit stop voltage rise, meanwhile, voltage collection circuit gathers the magnitude of voltage of LED module negative pole and sends controller to and record LED ignition voltage value now; Equipment lights LED module direct for the second time fast with the parameter recorded, as long as carry out once lighting of this pattern after changing the LED module of different size.
Step 2, when LED module is extracted, latching circuit transmits latch signal to controller, and controller drives Boost potential circuit to cut out and drives Boost to determine voltage follower circuit and applies voltage to LED module;
Step 3, voltage collection circuit gathers the magnitude of voltage of LED module positive pole and sends controller to and compare, if it is identical that the magnitude of voltage that voltage collection circuit gathers and Boost determine the magnitude of voltage that voltage follower circuit exports, then judge that LED module disconnects, if the magnitude of voltage that voltage collection circuit gathers is within the scope of LED ignition voltage value, then judge that LED module is communicated with and lights LED module by controller.
When in present embodiment, LED module is extracted in circuit magnitude of voltage sharply decline latching circuit send latch signal Boost potential circuit disconnected, startup Boost determines voltage follower circuit output voltage and judges whether LED module is communicated with simultaneously, when ensureing that LED module is extracted, in circuit, electric current is excessive burns LED module, lighted by Boost potential circuit when LED module is communicated with, realize lighting and detecting of LED module.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (6)
1.LED module lights checkout gear, it is characterized in that, comprising:
Boost determines voltage follower circuit, and its output is electrically connected with the positive pole of LED module, for providing voltage for LED module;
Boost potential circuit, its output is electrically connected with the positive pole of LED module, for providing voltage for LED module;
Constant-current circuit, its input is connected with the negative electricity of LED module;
Voltage collection circuit, its positive pole with LED module, negative electricity are connected, for gathering the voltage at LED module two ends;
Controller, the input that its output and Boost determine voltage follower circuit, Boost potential circuit and constant-current circuit is electrically connected, and its input is electrically connected with the output of voltage collection circuit.
2. LED module according to claim 1 lights checkout gear, it is characterized in that, described Boost potential circuit comprises connected Boost circuit and D/A module, the output of described Boost circuit is electrically connected with the positive pole of LED-backlit module, and described D/A module is electrically connected with the output of described controller.
3. LED module according to claim 1 lights checkout gear, it is characterized in that, is also provided with the mount pad for installing LED module.
4. LED module according to claim 3 lights checkout gear, it is characterized in that, is also provided with latching circuit, and its input is electrically connected with the output of described constant-current circuit, and its output is electrically connected with the input of described controller.
5. the LED module as described in as arbitrary in claim 1-4 lights a detection method, it is characterized in that, comprising:
Boost determines voltage follower circuit and closes, the ascending rising of voltage of controller control Boost potential circuit until when LED module is lighted Boost potential circuit stop voltage rise, meanwhile, voltage collection circuit gathers the magnitude of voltage of LED module negative pole and sends controller to and record LED ignition voltage value now; Equipment lights LED module direct for the second time fast with the parameter recorded, as long as carry out once lighting of this pattern after changing the LED module of different size.
6. LED module according to claim 5 lights detection method, it is characterized in that, also comprises:
When LED module is extracted, latching circuit transmits latch signal to controller, and controller drives Boost potential circuit to cut out and drives Boost to determine voltage follower circuit and applies voltage to LED module;
Voltage collection circuit gathers the magnitude of voltage of LED module positive pole and sends controller to and compare, if it is identical that the magnitude of voltage that voltage collection circuit gathers and Boost determine the magnitude of voltage that voltage follower circuit exports, then judge that LED module disconnects, if the magnitude of voltage that voltage collection circuit gathers is within the scope of LED ignition voltage, then judge that LED module is communicated with and lights LED module by controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734914.0A CN104507215B (en) | 2014-12-04 | 2014-12-04 | LED module lights detection device and its lights detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734914.0A CN104507215B (en) | 2014-12-04 | 2014-12-04 | LED module lights detection device and its lights detection method |
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| Publication Number | Publication Date |
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| CN104507215A true CN104507215A (en) | 2015-04-08 |
| CN104507215B CN104507215B (en) | 2018-05-04 |
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| CN201410734914.0A Active CN104507215B (en) | 2014-12-04 | 2014-12-04 | LED module lights detection device and its lights detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099170A (en) * | 2015-09-14 | 2015-11-25 | 东莞市亚通光电有限公司 | Power supply circuit for detecting backlight module |
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| CN1779523A (en) * | 2004-11-24 | 2006-05-31 | Lg.菲利浦Lcd株式会社 | Circuit and method for sensing open-circuit lamp, and display device therewith |
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| CN102548140A (en) * | 2010-12-28 | 2012-07-04 | 松下电器产业株式会社 | Led lighting device and illumination apparatus including same |
| CN102762005A (en) * | 2011-04-28 | 2012-10-31 | 东莞勤上光电股份有限公司 | LED luminaire and LED lamp protecting device |
| US20130106292A1 (en) * | 2011-10-28 | 2013-05-02 | Lg Innotek Co., Ltd. | Led protection circuit |
| JP2014108004A (en) * | 2012-11-29 | 2014-06-09 | Alpine Electronics Inc | Backlight dimming controller and dimming control method |
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| CN1607715A (en) * | 2003-10-08 | 2005-04-20 | 罗姆股份有限公司 | Switching power supply unit |
| CN1779523A (en) * | 2004-11-24 | 2006-05-31 | Lg.菲利浦Lcd株式会社 | Circuit and method for sensing open-circuit lamp, and display device therewith |
| CN201680231U (en) * | 2010-03-17 | 2010-12-22 | Bcd半导体制造有限公司 | LED backlight driving device of LCD |
| CN201636548U (en) * | 2010-03-26 | 2010-11-17 | 广州市雅江光电设备有限公司 | LED portable battery lamp |
| CN102548140A (en) * | 2010-12-28 | 2012-07-04 | 松下电器产业株式会社 | Led lighting device and illumination apparatus including same |
| CN102762005A (en) * | 2011-04-28 | 2012-10-31 | 东莞勤上光电股份有限公司 | LED luminaire and LED lamp protecting device |
| US20130106292A1 (en) * | 2011-10-28 | 2013-05-02 | Lg Innotek Co., Ltd. | Led protection circuit |
| JP2014108004A (en) * | 2012-11-29 | 2014-06-09 | Alpine Electronics Inc | Backlight dimming controller and dimming control method |
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| CN105099170A (en) * | 2015-09-14 | 2015-11-25 | 东莞市亚通光电有限公司 | Power supply circuit for detecting backlight module |
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| Publication number | Publication date |
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| CN104507215B (en) | 2018-05-04 |
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Address after: 215000 No. 18 Weiwen Road, Suzhou Industrial Park, Jiangsu Province Patentee after: Hai Electronic Technology (Suzhou) Co., Ltd. Address before: 215000 No. 18 Weiwen Road, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee before: SUZHOU INDUSTRIAL PARK HIDEA MECHATRONICS TECHNOLOGY CO., LTD. |