CN2455037Y - Flash-free eye-protective lamp for reading - Google Patents
Flash-free eye-protective lamp for reading Download PDFInfo
- Publication number
- CN2455037Y CN2455037Y CN 00256426 CN00256426U CN2455037Y CN 2455037 Y CN2455037 Y CN 2455037Y CN 00256426 CN00256426 CN 00256426 CN 00256426 U CN00256426 U CN 00256426U CN 2455037 Y CN2455037 Y CN 2455037Y
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- primary coil
- input
- compensation transformer
- output
- lamp
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Abstract
The utility model relates to a flash-free eye-protective lamp for reading. The lamp converts AC commercial power to stable DC 220V to provide power for an incandescent bulb under the action of a voltage-stabilizing circuit, a rectification circuit and a filtering control circuit. The lamp can have no any flicker phenomenon under the condition of poor electric network. The lamp filaments of the incandescent bulb uniformly glow. The harmful luminescence flash phenomenon of the incandescent bulb to human body is thoroughly eliminated. The utility model can be widely used in the normal lighting field.
Description
The utility model relates to a kind of lighting, particularly a kind of thermal light source desk lamp.
Existing thermal light source desk lamp all uses the sinusoidal wave industrial AC power of 220V 50HZ directly to power, and thermal light source is the ordinary incandescent lamp bubble.Because power supply network voltage fluctuation, wave distortion and 100 situations such as zero passage of industrial AC power per second that various random causes such as industrial electric interference, high-power household electrical appliance automatic start-stop cause have caused the luminous stroboscopic phenomenon of incandescent lamp bulb, this phenomenon is particularly serious when peak of power consumption and electricity shortage.All people who under the serious desk lamp of stroboscopic, works, learns for a long time, spirit is easily tired, the vision fatiguability, health is easily impaired.
The purpose of this utility model provide a kind of under relatively poor electrical network condition no any scintillation, the novel reading lamp of incandescent lamp bulb filament uniformly light-emitting.
The utility model comprises lamp housing, lampshade, incandescent lamp bulb L, switch SW, is characterized in: also comprise power-supplying circuit; This circuit is made of voltage stabilizing, rectification, filter circuit, an input of power-supplying circuit connects the phase line of single phase alternating current (A.C.) civil power through switch SW, another input connects the zero line of single phase alternating current (A.C.) civil power, and two terminals of two outputs and incandescent lamp bulb L are connected in parallel.
Described voltage stabilizing, rectification, filter circuit are made of compensation transformer T1, full-wave rectification bridge D1～D4, electrolytic capacitor C1, C2; The input of compensation transformer T1 connects the phase line of single phase alternating current (A.C.) civil power through switch SW, another input connects the zero line of single phase alternating current (A.C.) civil power, two outputs of compensation transformer T1 are connected with two inputs of full-wave rectification bridge D1～D4, two outputs of full-wave rectification bridge D1～D4 and two terminals of incandescent lamp bulb L are connected in parallel, after electrolytic capacitor C1, the C2 parallel connection, its positive pole is connected with the output (negative pole) of full-wave rectification bridge D1～D4, and its negative pole is connected with the output (positive pole) of full-wave rectification bridge D1～D4.
Described compensation transformer T1 is made of primary coil L1, secondary coil L2, silicon sheet core; Primary coil L1, secondary coil L2 are co-located on the silicon sheet core, primary coil L1, secondary coil L2 respectively get an end respectively as input, the remaining two ends of two coils link together, constitute the output of compensation transformer T1, another output is made of the input of primary coil L1; Can also primary coil L1, secondary coil L2 respectively get an end respectively as output, the remaining two ends of two coils link together, and constitute the input of compensation transformer T1, and another input is made of the output of primary coil L1.
During use, connect switch SW, the 220V electric main is added on the compensation transformer T1 input.Owing to adopt compensation step-down mode, guaranteed that the two ends of incandescent lamp bulb L obtain the 220V direct voltage, make the light bulb filament caloric value identical with 220V AC value power supplying and heating amount, guarantee the design power of bulb; Compensation transformer T1 can be considered an equivalent inductance string at input, because flowing through the electric current of inductance can not suddenly change, when switch SW is closed, input current can only progressively increase by zero with the regular hour constant, with limiting capacitance device charging current, reduce the impact of capacitor charging, and prolong capacitor charge time AC power and rectifier diode.During each energized, because the voltage at capacitor two ends can not suddenly change, the voltage at capacitor two ends begins to increase by zero, and light bulb filament voltage raises with condenser voltage and increases, thereby the excessive problem of impulse current when reducing the light bulb filament cold conditions and powering up has suddenly prolonged useful life of bulb.
The utility model is under the effect of power-supplying circuit, it is the incandescent lamp bulb power supply that electric main is converted to steady direct current 220V, accomplished no any scintillation under relatively poor electrical network condition, incandescent lamp bulb filament uniformly light-emitting has thoroughly been eliminated the luminous stroboscopic phenomenon of harmful incandescent lamp bulb.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described:
Accompanying drawing 1 is the electrical schematic diagram of the utility model embodiment
With reference to the accompanying drawings 1, the utility model comprises lamp housing, lampshade, incandescent lamp bulb L, switch SW, is characterized in: also comprise power-supplying circuit; This circuit is made of voltage stabilizing, rectification, filter circuit, an input of power-supplying circuit connects the phase line of single phase alternating current (A.C.) civil power through switch SW, another input connects the zero line of single phase alternating current (A.C.) civil power, and two terminals of two outputs and incandescent lamp bulb L are connected in parallel.
Described voltage stabilizing, rectification, filter circuit are made of compensation transformer T1, full-wave rectification bridge D1～D4, electrolytic capacitor C1, C2; The input of compensation transformer T1 connects the phase line of single phase alternating current (A.C.) civil power through switch SW, another input connects the zero line of single phase alternating current (A.C.) civil power, two outputs of compensation transformer T1 are connected with two inputs of full-wave rectification bridge D1～D4, two outputs of full-wave rectification bridge D1～D4 and two terminals of incandescent lamp bulb L are connected in parallel, after electrolytic capacitor C1, the C2 parallel connection, its positive pole is connected with the output (negative pole) of full-wave rectification bridge D1～D4, and its negative pole is connected with the output (positive pole) of full-wave rectification bridge D1～D4.
Described compensation transformer T1 is made of primary coil L1, secondary coil L2, silicon sheet core; Primary coil L1, secondary coil L2 are co-located on the silicon sheet core, primary coil L1, secondary coil L2 respectively get an end respectively as input, the remaining two ends of two coils link together, constitute the output of compensation transformer T1, another output is made of the input of primary coil L1; Can also primary coil L1, secondary coil L2 respectively get an end respectively as output, the remaining two ends of two coils link together, and constitute the input of compensation transformer T1, and another input is made of the output of primary coil L1.
During use, connect switch SW, the 220V electric main is added on the compensation transformer T1 input.Owing to adopt compensation step-down mode, guaranteed that the two ends of incandescent lamp bulb L obtain the 220V direct voltage, make the light bulb filament caloric value identical with 220V AC value power supplying and heating amount, guarantee the design power of bulb; Compensation transformer T1 can be considered an equivalent inductance string at input, because flowing through the electric current of inductance can not suddenly change, when switch SW is closed, input current can only progressively increase by zero with the regular hour constant, with limiting capacitance device charging current, reduce the impact of capacitor charging, and prolong capacitor charge time AC power and rectifier diode.During each energized, because the voltage at capacitor two ends can not suddenly change, the voltage at capacitor two ends begins to increase by zero, and light bulb filament voltage raises with condenser voltage and increases, thereby the excessive problem of impulse current when reducing the light bulb filament cold conditions and powering up has suddenly prolonged useful life of bulb.
In embodiment of the present utility model, the primary coil L1 of compensation transformer presses the setting of 220V voltage, and secondary coil L2 presses the setting of 40V voltage; Rectifier diode D1～D4 model is IN4007; Electrolytic capacitor C1, C2 are 400V 47 μ f.
Claims (4)
1. a no stroboscopic is read eye-protective lamp, comprises lamp housing, lampshade, incandescent lamp bulb (L), switch (SW), it is characterized in that: also comprise power-supplying circuit; This circuit is made of voltage stabilizing, rectification, filter circuit, an input of power-supplying circuit connects the phase line of single phase alternating current (A.C.) civil power through switch (SW), another input connects the zero line of single phase alternating current (A.C.) civil power, and two terminals of two outputs and incandescent lamp bulb (L) are connected in parallel.
2. no stroboscopic as claimed in claim 1 is read eye-protective lamp, it is characterized in that: (D1～D4), (C1 C2) constitutes electrolytic capacitor by compensation transformer (T1), full-wave rectification bridge for described voltage stabilizing, rectification, filter circuit; An input of compensation transformer (T1) connects the phase line of single phase alternating current (A.C.) civil power through switch (SW), another input connects the zero line of single phase alternating current (A.C.) civil power, (two inputs of D1～D4) are connected for two outputs of compensation transformer (T1) and full-wave rectification bridge, (two outputs of D1～D4) and two terminals of incandescent lamp bulb (L) are connected in parallel full-wave rectification bridge, electrolytic capacitor (C1, C2) after the parallel connection, (output (negative pole) of D1～D4) is connected, and (output (positive pole) of D1～D4) is connected for its negative pole and full-wave rectification bridge for its anodal and full-wave rectification bridge.
3. no stroboscopic as claimed in claim 1 is read eye-protective lamp, it is characterized in that: described compensation transformer (T1) is made of primary coil (L1), secondary coil (L2), silicon sheet core; Primary coil (L1), secondary coil (L2) are co-located on the silicon sheet core, primary coil (L1), secondary coil (L2) are respectively got an end respectively as input, the remaining two ends of two coils link together, constitute an output of compensation transformer (T1), another output is made of the input of primary coil (L1).
4. no stroboscopic as claimed in claim 1 is read eye-protective lamp, it is characterized in that: described compensation transformer (T1) is made of primary coil (L1), secondary coil (L2), silicon sheet core; Primary coil (L1), secondary coil (L2) are co-located on the silicon sheet core, primary coil (L1), secondary coil (L2) are respectively got an end respectively as output, the remaining two ends of two coils link together, constitute an input of compensation transformer (T1), another input is made of the output of primary coil (L1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00256426 CN2455037Y (en) | 2000-11-14 | 2000-11-14 | Flash-free eye-protective lamp for reading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00256426 CN2455037Y (en) | 2000-11-14 | 2000-11-14 | Flash-free eye-protective lamp for reading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2455037Y true CN2455037Y (en) | 2001-10-17 |
Family
ID=33613145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00256426 Expired - Fee Related CN2455037Y (en) | 2000-11-14 | 2000-11-14 | Flash-free eye-protective lamp for reading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2455037Y (en) |
-
2000
- 2000-11-14 CN CN 00256426 patent/CN2455037Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |