TWM549299U - Light source module with dual chips and dual circuits, and display using the same - Google Patents

Description

Double crystal double loop light source module and display using same

The present invention relates to a light source module and a display using the same, and in particular to a dual crystal dual loop light source module and a display using the same.

In recent years, the display is developing towards a light and durable product form, and the requirements for color are also improved at the same time. The requirement of high contrast and high brightness makes it possible to achieve a higher color gamut (NTSC > 95%) in the backlight module. The focus of research and development.

In the backlight module using a light-emitting diode (LED), the light-emitting unit is mostly composed of a blue light-emitting diode chip, a green light-emitting diode chip and a red phosphor powder. The blue light emitting diode chip and the green light emitting diode chip respectively emit blue light and green light by the current, and the red fluorescent powder is excited by the blue light and the green light to generate white light, but due to the traditional design, the blue light emitting diode The chip and the green light emitting diode chip are controlled by the same driving unit, and the current flowing through the blue light emitting diode chip and the green light emitting diode chip during driving is the same and fixed, so the color of the conventional backlight module The domain range is fixed and cannot be changed, and the optimal color gamut range cannot be obtained by adjustment. Therefore, the existing design can no longer meet the needs of current displays.

The present embodiment provides a dual-crystal dual-loop light source module and a display using the same, which can adjust the overall color gamut and make the adjustment of the color gamut more flexible. In addition, the heat generated by the dual-crystal dual-loop light source module can be effectively derived, thereby improving the service life of the dual-crystal dual-loop light source module.

The present invention provides a dual-crystal dual-loop light source module including a light-emitting element and a control circuit board. The light-emitting element has a circuit board and a light-emitting unit, and the light-emitting unit is disposed on the circuit board, and the light-emitting unit is formed by co-packaging the first light-emitting diode chip, the second light-emitting diode chip and the phosphor powder. The control circuit board has a first driving unit and a second driving unit, wherein the first driving unit is coupled to the first LED chip through the first control circuit to form a first loop, and the second driving unit is coupled to the second driving unit through the second control circuit The second LED array is coupled to form a second loop, thereby forming an independent dual loop control design. The first light emitting diode chip and the second light emitting diode chip are respectively controlled by the first driving unit and the second driving unit, thereby respectively controlling the flow of the first light emitting diode chip and the second light emitting diode The amount of current of the wafer, in turn, can control the color gamut range of the first LED chip and the second LED chip, respectively, to provide a better overall color gamut adjustment mode, which makes the adjustment of the color gamut more flexible.

According to an alternative embodiment, the first light emitting diode chip comprises a blue light emitting diode chip, the second light emitting diode chip comprises a green light emitting diode chip, and the phosphor powder is a red phosphor powder. Thereby, the first driving unit drives the first light emitting diode chip (blue light emitting diode chip) to emit blue light via the first control circuit, and the second driving unit drives the second light emitting diode chip via the second control circuit ( The green light emitting diode chip emits green light, and then the red fluorescent powder is excited by the blue light and the green light, so that the light emitting unit of the double crystal double loop light source module can generate white light and is used as a backlight of the display.

According to an alternative embodiment, the circuit board is a circuit board using a metal substrate, and the light emitting unit is disposed on the circuit board by solder. The heat generated by the light-emitting unit can be effectively derived by the high thermal conductivity of the solder having a better thermal conductivity and the circuit board using the metal substrate to enhance the first light-emitting diode chip and the second light-emitting diode in the light-emitting unit. The wafer life of the bulk wafer.

The present invention provides a display including a housing, a backlight module, and a display module. The backlight module is disposed in the housing, and the backlight module comprises a light guide plate and the foregoing dual crystal dual-loop light source module. The light guide plate has a light incident surface and a light exit surface, and the double crystal double loop light source module is disposed on one side of the light guide plate, wherein the light emitting element corresponds to the light incident surface, whereby the light generated by the light emitting element enters the light guide plate from the light incident surface. The reflection conduction is performed inside, and the backlight required to provide the display module is emitted from the light exit surface.

According to an alternative embodiment, the display module comprises an optical film and a liquid crystal panel. The optical film is disposed on the light guide plate and corresponds to the light emitting surface. The liquid crystal panel is disposed on the optical film and corresponds to the light emitting surface.

According to an alternative embodiment, the display further comprises a reflector. The reflector is disposed between the light guide plate and the housing, and is configured to enable the double-crystal dual-loop light source module to enter the light guide plate into the light guide plate, and perform reflective conduction (total reflection) in the light guide plate to reach the light guide plate. On the other side of the illuminating surface.

The detailed features and advantages of the present invention are described in detail below in the embodiments, which are sufficient to enable any skilled artisan to understand the technical contents of the present invention and implement it according to the contents, the scope of the patent application and the drawings. Anyone familiar with the relevant art can easily understand the purpose and advantages of this creation.

The present invention is described in detail with reference to the drawings, and the drawings used herein are for illustrative purposes only and are not intended to be a true proportion and precise configuration after the implementation of the present invention, and therefore should not be attached Interpretation of the proportion and configuration relationship of the schema, the scope of the rights in the actual implementation of the creation, together with the first.

Please refer to FIG. 1 and FIG. 2 , which are schematic diagrams of a display and a dual-crystal dual-loop light source module according to an embodiment of the present invention. Please refer to FIG. 1 . The display of the present embodiment includes a housing 10 , a backlight module 20 , a display module 30 , and a reflector 40 . The backlight module 20 and the reflector 40 are disposed in the housing 10 . The backlight module 20 includes a light guide plate 21 and a dual-crystal dual-loop light source module 22 , and the light guide plate 21 has a light incident surface 211 and a light exit surface 212 . The dual-crystal dual-circuit light source module 22 is disposed on one side of the light guide plate 21, that is, corresponding to the light-incident surface 211, and the display module 30 is disposed on the light guide plate 21, that is, corresponding to the light-emitting surface 212. More specifically, the display module 30 includes an optical film 31 and a liquid crystal panel 32. The optical film 31 is disposed on the light guide plate 21 and corresponds to the light exit surface 212, and the liquid crystal panel 32 is disposed on the optical film 31 and correspondingly On the light emitting surface 212. In addition, the reflector 40 is disposed between the light guide plate 21 and the housing 10, and the reflector 40 is used to allow the double-crystal dual-loop light source module 22 to enter the light guide plate 21 from the light-incident surface 211, and is disposed in the light guide plate 21. Reflective conduction is performed to reach the other side of the light guide plate 21 with respect to the light exit surface 212.

Referring to FIG. 2 again, the dual-crystal dual-loop light source module 22 of the embodiment includes a light-emitting element 23 and a control circuit board 24. The light-emitting element 23 has a circuit board 231 and a light-emitting unit 232. The light-emitting unit 232 is disposed on the circuit board 231, and the light-emitting unit 232 is shared by the first light-emitting diode wafer 233 and the second light-emitting diode wafer 234 and the phosphor powder 235. The package structure is such that the dual-crystal dual-loop light source module 22 is designed with a dual-emitting diode chip. The control circuit board 24 has a first driving unit 241 and a second driving unit 242, wherein the first driving unit 241 is coupled to the first LED array 233 by the first control circuit 243 to form a first loop, and the second driving unit The second control circuit 244 is coupled to the second LED chip 234 to form a second circuit. The first loop and the second loop are independent loops respectively, so the dual crystal dual loop light source module 22 adopts an independent dual loop control design. Because the dual-loop control design is adopted, the first LED chip 233 and the second LED chip 234 are respectively controlled by the first driving unit 241 and the second driving unit 242, thereby respectively controlling the inflow of the first LED 2 The amount of current of the polar body wafer 233 and the second light emitting diode wafer 234 can further control the color gamut range of the first light emitting diode wafer 233 and the second light emitting diode wafer 234, respectively, to provide a better overall. The gamut adjustment method makes the adjustment of the gamut more flexible.

In addition to the above, in the dual-crystal dual-loop light source module 22 of the present embodiment, the first light-emitting diode wafer 233 includes a blue light-emitting diode wafer, and the second light-emitting diode wafer 234 includes a green light-emitting diode. The body wafer, and the phosphor powder 235 is a red phosphor powder. Thereby, the first driving unit 241 drives the first light emitting diode wafer 233 (blue light emitting diode wafer) to emit blue light via the first control circuit 243, and the second driving unit 242 drives the second light emitting through the second control circuit 244. The diode wafer 234 (green light-emitting diode wafer) emits green light, and the red phosphor powder 235 is excited by the blue light and the green light, so that the light-emitting unit 232 of the dual-crystal dual-loop light source module 22 can generate white light as The backlight of the display is used.

Further, in the dual-crystal dual-circuit light source module 22 of the present embodiment, the circuit board 231 is a circuit board using a metal substrate, such as an aluminum substrate. The light-emitting unit 232 is provided on the circuit board 231 by solder 236 (for example, solder paste) as shown in FIG. The heat generated by the light-emitting unit 232 can be effectively derived by the high thermal conductivity of the solder 236 having a better thermal conductivity and the circuit board 231 using the metal substrate to enhance the first light-emitting diode wafer 233 in the light-emitting unit 232. The wafer lifetime of the second LED wafer 234.

This creation has been described by the above related embodiments, but the above embodiments are merely examples for implementing the creation. It must be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and equivalents of the spirit and scope of the invention are included in the scope of the present invention.

10‧‧‧shell
20‧‧‧Backlight module
21‧‧‧Light guide
211‧‧‧Into the glossy surface
212‧‧‧Glossy surface
22‧‧‧Double crystal dual-loop light source module
23‧‧‧Lighting elements
231‧‧‧ circuit board
232‧‧‧Lighting unit
233‧‧‧First LED Diode Wafer
234‧‧‧Second light-emitting diode chip
235‧‧‧Fluorescent powder
236‧‧‧ solder
24‧‧‧Control Board
241‧‧‧First drive unit
242‧‧‧Second drive unit
243‧‧‧First control circuit
244‧‧‧Second control circuit
30‧‧‧Display module
31‧‧‧Optical diaphragm
32‧‧‧LCD panel
40‧‧‧reflector

1 is a schematic diagram of a display according to an embodiment of the present invention; and FIG. 2 is a schematic diagram of a dual-crystal dual-loop light source module according to an embodiment of the present invention.

22‧‧‧Double crystal dual-loop light source module

23‧‧‧Lighting elements

231‧‧‧ circuit board

232‧‧‧Lighting unit

233‧‧‧First LED Diode Wafer

234‧‧‧Second light-emitting diode chip

235‧‧‧Fluorescent powder

24‧‧‧Control Board

241‧‧‧First drive unit

242‧‧‧Second drive unit

243‧‧‧First control circuit

244‧‧‧Second control circuit

Claims (6)

A dual-crystal dual-loop light source module includes: a light-emitting element having a circuit board and a light-emitting unit, the light-emitting unit is disposed on the circuit board, and the light-emitting unit comprises a first light-emitting diode chip, a first The second LED chip is co-packaged with a phosphor; and a control circuit board has a first driving unit and a second driving unit, wherein the first driving unit passes the first control circuit and the first The LEDs are connected to each other to form a first loop, and the second driving unit is coupled to the second LED chip via a second control circuit to form a second loop. The dual-crystal dual-loop light source module of claim 1, wherein the first light-emitting diode chip comprises a blue light-emitting diode chip, and the second light-emitting diode chip comprises a green light-emitting diode A polar body wafer, and the phosphor powder is a red phosphor powder. The dual-crystal dual-loop light source module of claim 1, wherein the circuit board is a circuit board using a metal substrate, and the light-emitting unit is disposed on the circuit board by a solder. A display includes: a housing; a backlight module disposed in the housing, the backlight module comprising: a light guide plate having a light incident surface and a light exit surface; and the first to third items as claimed in the patent application The dual-crystal dual-loop light source module of any one of the two, wherein the dual-crystal dual-loop light source module is disposed on one side of the light guide plate, wherein the light-emitting element corresponds to the light-incident surface; and a display module is disposed. On the light guide plate, and corresponding to the light exit surface. The display module of claim 4, wherein the display module comprises: an optical film disposed on the light guide plate and corresponding to the light emitting surface; and a liquid crystal panel disposed on the optical film And corresponds to the illuminating surface. The display of claim 4, further comprising a reflector disposed between the light guide plate and the housing.