Unlock instant, AI-driven research and patent intelligence for your innovation.

LED lighting device and LED illuminator

A technology for lighting devices and appliances, applied in lighting devices, electric lamp circuit layout, light sources, etc., can solve problems such as inability to prevent, general products have no structure, inconvenience, etc., to prevent damage or short life, and inhibit overcurrent from flowing through light-emitting diodes Effect

Inactive Publication Date: 2011-10-05
TOSHIBA LIGHTING & TECH CORP +1
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is impossible to prevent overcurrent from flowing through the LED unit due to sudden fluctuations in the power supply voltage when the LED unit is connected to the connection mechanism.
[0008] Moreover, the LED drive device is provided with a no-load judging mechanism or an on-off switching mechanism to switch the on-off state of the switching element of the discharge mechanism, so there is a disadvantage that the circuit structure becomes complicated and thus expensive.
[0009] It can be seen that the above-mentioned existing LED lighting devices and LED lighting fixtures obviously still have inconvenience and defects in structure and use, and need to be further improved urgently.
In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general products do not have a suitable structure to solve the above-mentioned problems. This is obviously related. The problem that the industry is eager to solve

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • LED lighting device and LED illuminator
  • LED lighting device and LED illuminator
  • LED lighting device and LED illuminator

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0059] figure 1 as well as figure 2 Representing Example 1 of the present invention, figure 1 It is a schematic circuit diagram of the LED lighting device, figure 2 It is a graph of the change of the current flowing through the light-emitting diode.

[0060] exist figure 1 Among them, the LED lighting device 1 includes a DC power supply circuit 2 , a light emitting diode 3 , a current detection circuit 4 , and a bypass circuit 5 . Furthermore, the input terminals 6 a and 6 b are connected to a commercial AC power supply Vs, and the output terminals 7 a and 7 b are provided in a connector 8 .

[0061] The DC power supply circuit is composed of an AC-DC (Alternating Current-Direct Current, AC-DC) conversion circuit 9 and a step-down chopper circuit 10 . The AC-DC conversion circuit 9 includes a full-wave rectification circuit 11 , a noise filter circuit 12 including a transformer T1 , and a capacitor C1 functioning as a noise filter. Furthermore, the input terminal of th...

example 2

[0081] image 3 It is a schematic circuit diagram showing the LED lighting device of Example 2 of the present invention. Additionally, for figure 1 The same parts are marked with the same symbols and descriptions are omitted.

[0082] image 3 The LED lighting device 15 shown is in figure 1 The shown LED lighting device 1 is provided with a current blocking circuit 16 . Furthermore, a plurality of output terminals 7a1, 7b1, 7a2, and 7b2 are provided, and a plurality of LED circuits 14 are connected. In addition, a current detection circuit 4 and a current blocking circuit 16 are provided for each LED circuit 14 . Furthermore, a resistor R 3 is inserted between the current detection circuit 4 and the current blocking circuit 16 .

[0083] The current blocking circuit 16 blocks the current flowing through the light emitting diode 3 , is connected in series to the light emitting diode 3 , and is connected closer to the light emitting diode 3 side than the current detection ...

example 3

[0093] Figure 4 It is a schematic perspective view which shows the LED lighting fixture of Example 3 of this invention. Additionally, for figure 2 The same parts are marked with the same symbols and descriptions are omitted.

[0094] Figure 4 The illustrated LED lighting fixture 17 is, for example, a general lighting fixture that is directly mounted or suspended from a ceiling surface, and includes a rectangular, substantially box-shaped fixture body 18 and a light source unit 19 disposed in the fixture body 18 . The light emitting diode 3 is formed as a luminous body 20 and provided on the side of the light source unit 19 .

[0095] The light source unit 19 is composed of a unit body 21 and a cover body 22 . The unit body 21 is formed as a bottomed frame body whose lengthwise dimension is equal to that of the appliance body 18 , whose width direction is larger than that of the appliance body 18 , and has a relatively shallow depth.

[0096] In addition, the illuminant...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an LED lighting device and an LED illuminator. The LED lighting device (1) comprises a DC power supply circuit (2) formed to output constant voltage to the two ends of a capacitor (C3) for smooth use; a light emitting diode (3) connected on the two ends of the capacitor (C3) for smooth use; a current detecting circuit (4) for detecting the current flowing through the light emitting diode (3); and a bypass circuit (5) comprising a second resistor (R2) connected on the two ends of the capacitor (C3) for smooth use and a series circuit of a switching element (Trl) and used for controlling the switching element (Trl) to be turned on when the current is detected by the current detecting circuit (4) to be more than a prescribed value.

Description

technical field [0001] The present invention relates to an LED lighting device for lighting a light emitting diode (diode), and an LED lighting fixture provided with the LED lighting device. Background technique [0002] A light emitting diode (Light Emitting Diode, LED) is used as a light source for general lighting fixtures. This lighting fixture is equipped with a plurality of light emitting diodes to obtain predetermined illuminance (brightness). Furthermore, in order to make the light output from each light emitting diode as high as possible, a constant current close to the maximum allowable current may be made to flow through the light emitting diodes. Here, once the power supply voltage fluctuates suddenly, it may not be possible to perform constant current control in time, causing an overcurrent to flow through the light emitting diode. Furthermore, when the light emitting diode is removed from the lighting device that is powered on, or when the light emitting diod...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 寺坂博志
Owner TOSHIBA LIGHTING & TECH CORP