Light-emitting device for providing flash light source

• US 9,877,365 B1
• Filed: 02/09/2017
• Issued: 01/23/2018
• Est. Priority Date: 12/05/2016
• Status: Active Grant

• Current Assignee: Paragon Semiconductor Lighting Technology Co., Ltd.
• Original Assignee: Paragon Semiconductor Lighting Technology Co., Ltd.
• Inventors: Chung, Chia-Tin
• Primary Examiner(s): Tran, Thuy Vinh
• Application Number:
  US15/429,148
• Time in Patent Office: 348 Days
• Field of Search: 315149, 315150, 315 34, 315362
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/46 Reflective coating, e.g. dielectric Bragg reflector
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• CPC Class Codes: H01Q 1/2283 mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package
• CPC Class Codes: H01Q 1/44 using equipment having another main function to serve additionally as an antenna , e.g. means for giving an antenna an aesthetic aspectH01Q1/27 - H01Q1/34 take precedence
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/14 using electrical feedback from LEDs or from LED modules
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: H05B 47/16 by timing means
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The prevent invention provides a light-emitting device for providing a flash light source comprising a light-emitting module and a control module. The light-emitting module comprises a circuit substrate and a plurality of light-emitting elements disposed on the circuit substrate and electrically connected to the circuit substrate. The control module comprises a semiconductor switch element having a MOSFET for turning the light-emitting elements on or off, wherein the semiconductor switch element is electrically connected to the light-emitting elements thereby the light-emitting elements can flash via the semiconductor switch element alternately turning on and off the light-emitting elements.

Claims

1. A light-emitting device for providing a flash light source, comprising:

a light-emitting module including a circuit substrate and a plurality of light-emitting elements disposed on the circuit substrate and electrically connected to the circuit substrate;

a control module including a semiconductor switch element having a MOSFET for turning the light-emitting module on or off, wherein the semiconductor switch element is electrically connected to the light-emitting elements, and each light-emitting element is alternately turned on and off by the semiconductor switch element so as to generate the flash light source; and

a radio receiving module electrically connected to the control module, wherein the radio receiving module includes a magnetic antenna structure, a radio wave generated by a radio station is received by the magnetic antenna structure of the radio receiving module, and the radio wave has a time correction signal;

wherein the time correction signal received by the radio receiving module is transmitted to the control module, the time correction signal is transformed into a time synchronization signal through the control module, and the light-emitting elements are synchronously flashed by the semiconductor switch element of the control module according to the time synchronization signal.

2. The light-emitting device of claim 1, further comprising:

a power module including a variable resistor electrically connected to an external power supply, and a stabilizer electrically connected between the variable resistor and the radio receiving module;

an optical sensor module electrically connected to the control module for receiving an external light source, wherein the optical sensor module provides a light intensity signal to the control module according to a light intensity provided by the external light source, and the light-emitting elements are turned on to continuously flash or turned off to stop flashing by the semiconductor switch element of the control module according to the light intensity signal; and

a flash frequency adjustment module electrically connected to the control module, wherein the flash frequency adjustment module includes a flash frequency switch, the flash frequency adjustment module provides a flash frequency signal to the control module according to a predetermined flash frequency provided by the flash frequency switch, and the light-emitting elements are flashed at the predetermined flash frequency by the semiconductor switch element of the control module according to the flash frequency signal.

3. The light-emitting device of claim 1, wherein the light-emitting module includes:

a frame unit having a surrounding light-reflecting resin body surroundingly coated on the circuit substrate, wherein the surrounding light-reflecting resin body surrounds the light-emitting elements to form a limiting space on the circuit substrate, and the surrounding light-reflecting resin body has a convex junction portion; and

a package unit having a light-transmitting resin body disposed on the circuit substrate for enclosing the light-emitting elements, wherein the light-transmitting resin body is disposed inside the limiting space and surrounded by the surrounding light-reflecting resin body.

4. The light-emitting device of claim 1, wherein the light-emitting elements are divided into a first light-emitting group and a second light-emitting group, and the light-emitting module includes:

a frame unit having a first surrounding light-reflecting resin body surroundingly coated on the circuit substrate and a second surrounding light-reflecting resin body surroundingly coated on the circuit substrate for surrounding the first surrounding light-reflecting resin body, wherein the first surrounding light-reflecting resin body surrounds the first light-emitting group to form a first limiting space, the second surrounding light-reflecting resin body surrounds the second light-emitting group and the first surrounding light-reflecting resin body to form a second limiting space between the first surrounding light-reflecting resin body and the second surrounding light-reflecting resin body, the first surrounding light-reflecting resin body has a first convex junction portion and the second surrounding light-reflecting resin body has a second convex junction portion; and

a package unit having a first light-transmitting resin body enclosing the first light-emitting group on the circuit substrate and a second light-transmitting resin body enclosing the first light-emitting group on the circuit substrate, wherein the first light-transmitting resin body and the second light-transmitting resin body are surrounded by the first surrounding light-reflecting resin body and the second surrounding light-reflecting resin body respectively and disposed inside the first limiting space and the second limiting space respectively.

5. A light-emitting device for providing a flash light source, comprising:

a light-emitting module including a circuit substrate and a plurality of light-emitting elements disposed on the circuit substrate and electrically connected to the circuit substrate;

a control module including a semiconductor switch element having a MOSFET for turning the light-emitting module on or off, wherein the semiconductor switch element is electrically connected to the light-emitting elements, and each light-emitting element is alternately turned on and off by the semiconductor switch element so as to generate the flash light source; and

an optical sensor module electrically connected to the control module for receiving an external light source, wherein the optical sensor module provides a light intensity signal to the control module according to a light intensity provided by the external light source, and the light-emitting elements are turned on to continuously flash or turned off to stop flashing by the semiconductor switch element of the control module according to the light intensity signal.

6. The light-emitting device of claim 5, further comprising:

a flash frequency adjustment module electrically connected to the control module, wherein the flash frequency adjustment module includes a flash frequency switch, the flash frequency adjustment module provides a flash frequency signal to the control module according to a predetermined flash frequency provided by the flash frequency switch, and the light-emitting elements are flashed at the predetermined flash frequency by the semiconductor switch element of the control module according to the flash frequency signal.

7. The light-emitting device of claim 5, further comprising:

a radio receiving module electrically connected to the control module, wherein the radio receiving module includes a magnetic antenna structure, a radio wave generated by a radio station is received by the magnetic antenna structure of the radio receiving module, and the radio wave has a time correction signal, and wherein the time correction signal received by the radio receiving module is transmitted to the control module, the time correction signal is transformed into a time synchronization signal through the control module, and the light-emitting elements are synchronously flashed by the semiconductor switch element of the control module according to the time synchronization signal.

8. The light-emitting device of claim 5, wherein the light-emitting module includes:

a frame unit having a surrounding light-reflecting resin body surroundingly coated on the circuit substrate, wherein the surrounding light-reflecting resin body surrounds the light-emitting elements to form a limiting space on the circuit substrate, and the surrounding light-reflecting resin body has a convex junction portion; and

a package unit comprising a light-transmitting resin body disposed on the circuit substrate for enclosing the light-emitting elements, wherein the light-transmitting resin body is disposed inside the limiting space and surrounded by the surrounding light-reflecting resin body.

9. The light-emitting device of claim 5, wherein the light-emitting elements are divided into a first light-emitting group and a second light-emitting group, and the light-emitting module includes:

a frame unit having a first surrounding light-reflecting resin body surroundingly coated on the circuit substrate and a second surrounding light-reflecting resin body surroundingly coated on the circuit substrate for surrounding the first surrounding light-reflecting resin body, wherein the first surrounding light-reflecting resin body surrounds the first light-emitting group to form a first limiting space, the second surrounding light-reflecting resin body surrounds the second light-emitting group and the first surrounding light-reflecting resin body to form a second resin position limiting space between the first surrounding light-reflecting resin body and the second surrounding light-reflecting resin body, the first surrounding light-reflecting resin body has a first convex junction portion and the second surrounding light-reflecting resin body has a second convex junction portion; and

a package unit having a first light-transmitting resin body enclosing the first light-emitting group on the circuit substrate and a second light-transmitting resin body enclosing the first light-emitting group on the circuit substrate, wherein the first light-transmitting resin body and the second light-transmitting resin body are surrounded by the first surrounding light-reflecting resin body and the second surrounding light-reflecting resin body respectively and disposed inside the first resin position limiting space and the second resin position limiting space respectively.