CN201194046Y - LED film viewing lamp box for medical use - Google Patents
LED film viewing lamp box for medical use Download PDFInfo
- Publication number
- CN201194046Y CN201194046Y CNU2008200626814U CN200820062681U CN201194046Y CN 201194046 Y CN201194046 Y CN 201194046Y CN U2008200626814 U CNU2008200626814 U CN U2008200626814U CN 200820062681 U CN200820062681 U CN 200820062681U CN 201194046 Y CN201194046 Y CN 201194046Y
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- Prior art keywords
- high frequency
- emitting diode
- box
- frequency switch
- led
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- Expired - Fee Related
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Abstract
The utility model provides a medical use LED view box, which comprises a box and a LED light emitting diode assembly disposed in the box and a high frequency switch power supply. The input end of the high frequency switch power supply having an output voltage regulator is connected to the commercial power, the output end is connected to the LED light emitting diode assembly which has a current isostatic compensator. By adopting high frequency switch power supply, the utility model reduces the ripple factor of light, reduces flickers and make more benefits to viewing and hams less to the sight of doctor. The added current isostatic compensator makes that the luminous intensity of the LED light emitting diodes is almost same and the illumination of the inner space of the box is uniform, that also benefit more to the viewing.
Description
Technical field
The utility model relates to medical film viewing light box, specifically, is a kind of medical LED film viewing light box.
Background technology
Film viewing light box is the equipment that the medical personnel of hospital is used to observe the X-ray radiography egative film, old-fashioned medical film viewing light box is as light-emitting component with daylight lamp (cold-cathode fluorescence lamp) pipe, exist highly energy-consuming, thermal value big, light flicker is not soft, the brightness light and shade is inhomogeneous, easily aging, serviceable life is short, fluorescent tube is in case broken, mercury pollution such as can't avoid at defective.Along with development of science and technology, modern film viewing light box is used the LED light emitting diode instead as light-emitting component, has advantages such as power consumption is low, long service life, thermal value is few, brightness is high, volume is little.But, because power supply does not improve, still adopt civil power directly to power, civil power is the 50Hz power frequency, frequency is low, the light ripple factor height that the LED pipe sends, uneven illumination is even, the light and shade flicker, both unfavorable sight sheet also injures doctor's eyesight easily.
In addition, because of the quantity of used LED light emitting diode a lot, be divided into some assemblies, because the characterisitic parameter of each LED light emitting diode can not be identical, the intensity difference of the light that sends, the luminous intensity of each assembly is variant, and the uneven illumination of lamp box inner space is even, light and shade differs, and is unfavorable for seeing sheet.
Summary of the invention
The purpose of this utility model, provide a kind of light ripple factor low, do not glimmer, the uniform medical LED film viewing light box of illumination.
The technical scheme that the utility model adopted is:
A kind of medical LED film viewing light box comprises casing and is arranged in the interior LED light-emitting diode component of casing that also comprise high frequency switch power, the input end of this high frequency switch power connects civil power, and output terminal connects the LED light-emitting diode component.
Described high frequency switch power has output voltage regulator.
Described LED light-emitting diode component has the current balance compensator.
Described current balance compensator is a potentiometer.
The utility model has the advantages that:
Because of adopting the high frequency switch power power supply, the supply frequency height has reduced the ripple factor of light, and no longer flicker is more conducive to see sheet, also is difficult for injury doctor's eyesight simultaneously.
Because of having set up the current balance compensator, the luminous intensity of each LED light-emitting diode component is basic identical, and the illumination of lamp box inner space is even, is more conducive to see sheet.
Description of drawings
Fig. 1 is an electric theory diagram of the present utility model.
Fig. 2 is the utility model circuit diagram.
Embodiment
The utility model comprises casing, is arranged in LED light-emitting diode component and electric supply installation thereof in the casing.
Referring to Fig. 1: electric supply installation comprises power supply change-over device 1, current balance compensator 2.Wherein: power supply change-over device 1 is a kind of frequency converter, convert the 50HZ civil power to high frequency electric source, this frequency converter has output voltage regulator 3, can regulate output voltage, this power supply change-over device is existing commercially available prod, custom is called " DC high frequency switch power ", by A/D conversion → D/A conversion → A/D conversion, converts low frequency ac to high-frequency alternating current.Its principle is: is direct current with AC rectification earlier, converts direct current to alternating current by oscillator again, owing to adopt digital circuit, so need do repeatedly mould, number conversion.Between power supply change-over device 1 and LED light-emitting diode component 4, be in series with current balance compensator 2, current balance compensator 2 can adopt common resistance-type potentiometer.
Each light-emitting diode component 4 can adopt 3～15 white light straw hat shape LED serial connections to form, and the correlation parameter of the light emitting diode of selecting for use is as follows:
Brightness: IV〉1800mcd; Operating voltage: VF=3.0～3.4V; Luminous irradiating angle〉110 °; Colour temperature: WL=3000K～6500K.
The course of work of the present utility model is:
Referring to Fig. 2: civil power becomes high frequency electric source DC through K switch input converter E after frequency conversion, regulates pressure regulator T, and the value of output voltage is met the requirements.Be applied on the light emitting diode D through potentiometer W, light emitting diode D gets electroluminescence again.When the luminous intensity of each assembly was inconsistent, regulator potentiometer W changed its resistance value, compensates, and makes the current balance of each assembly, the luminous intensity unanimity.
Claims (4)
1. a medical LED film viewing light box comprises casing and is arranged in the interior LED light-emitting diode component of casing, and it is characterized in that: also comprise high frequency switch power, the input end of this high frequency switch power connects civil power, and output terminal connects the LED light-emitting diode component.
2. medical LED film viewing light box according to claim 1, it is characterized in that: described high frequency switch power has output voltage regulator.
3. medical LED film viewing light box according to claim 1 is characterized in that: described LED light-emitting diode component has the current balance compensator.
4. medical LED film viewing light box according to claim 3 is characterized in that: described current balance compensator is a potentiometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200626814U CN201194046Y (en) | 2008-03-25 | 2008-03-25 | LED film viewing lamp box for medical use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200626814U CN201194046Y (en) | 2008-03-25 | 2008-03-25 | LED film viewing lamp box for medical use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201194046Y true CN201194046Y (en) | 2009-02-11 |
Family
ID=40393578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200626814U Expired - Fee Related CN201194046Y (en) | 2008-03-25 | 2008-03-25 | LED film viewing lamp box for medical use |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201194046Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873739A (en) * | 2009-04-27 | 2010-10-27 | 台达电子工业股份有限公司 | Current-balancing supply circuit with multiple groups of DC loads |
-
2008
- 2008-03-25 CN CNU2008200626814U patent/CN201194046Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873739A (en) * | 2009-04-27 | 2010-10-27 | 台达电子工业股份有限公司 | Current-balancing supply circuit with multiple groups of DC loads |
| CN101873739B (en) * | 2009-04-27 | 2014-07-30 | 台达电子工业股份有限公司 | Current-balancing supply circuit with multiple groups of DC loads |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090211 Termination date: 20100325 |