WO2018095131A1

WO2018095131A1 - Quantum dot led

Info

Publication number: WO2018095131A1
Application number: PCT/CN2017/103466
Authority: WO
Inventors: 郑少洪
Original assignee: 广州视源电子科技股份有限公司; 广州视睿电子科技有限公司
Priority date: 2016-11-22
Filing date: 2017-09-26
Publication date: 2018-05-31
Also published as: CN206250216U

Abstract

A quantum dot LED, comprising a holder (110) provided with an open slot, an LED wafer (120), a transparent separator (130), a transparent cover plate (140), and a conductive body (150). The conductive body passes through the bottom of the open slot. One end of the conductive body is located in the open slot, and the other end of the conductive body is located outside the open slot. The transparent separator is provided in the open slot, and is fixedly and sealably connected to the holder. The transparent cover plate is provided on the side of the transparent separator distal from the LED wafer, and is fixedly and sealably connected to the holder. A first sealing groove (a) is formed between the transparent separator and the bottom of the open slot. The LED wafer is located in the first sealing groove, is fixed on the bottom of the open slot, and is electrically connected to the conductive body. A second sealing groove (b) is formed between the transparent separator and the transparent cover plate. The second sealing groove is used for filling quantum dots having at least two sizes. Both the overall structure and the manufacturing process of the quantum dot LED are simple. Moreover, the quantum dots in the second sealing groove are directly distributed above the LED wafer, can be excited by light, and have high utilization rate.

Description

Quantum dot LED

Technical field

The present invention relates to the field of semiconductor light-emitting technologies, and in particular to a quantum dot LED.

Background technique

A quantum dot is a nano-scale semiconductor light-emitting particle, and a quantum dot LED made by combining a quantum dot and an LED (Light Emitting Diode light-emitting diode) can be used for a display device.

The structure of the conventional quantum dot LED is as shown in FIG. 1. During operation, the blue LED 1 emits high-purity blue light to the glass tube 3 which is vacuum-packed with quantum dots, and the quantum dots of different sizes excite the three primary colors to be mixed into white light, thereby A high color gamut that achieves backlighting. However, the conventional quantum dot LED needs to complete the fixing of the blue LED 1 patch and the bracket-like structural component 2 on the LED PCB board 4, and the quantum dot glass tube 3 needs to be extended into the bracket-like structural component 2 and fixed. complex structure.

Summary of the invention

Based on this, it is necessary to provide a quantum dot LED with a simple structure for the above problems.

A quantum dot LED comprising an LED chip, a transparent separator, a transparent cover, an electrical conductor and a bracket provided with an open slot, the electrical conductor passing through the bottom of the open slot, and one end is located in the open slot The other end is located outside the open slot;

The transparent partition is disposed in the open slot and is fixedly and sealingly connected to the bracket, and the transparent cover is disposed on a side of the transparent partition away from the LED chip and is fixedly and sealingly connected to the bracket. a first sealing groove is formed between the transparent separator and the bottom of the opening groove, and the LED chip is fixed in the bottom of the opening groove in the first sealing groove, and is electrically connected to the electric conductor. A second sealing groove is formed between the transparent separator and the transparent cover, and the second sealing groove is used to fill quantum dots of at least two sizes.

The quantum dot LED has a first sealing groove formed by using a transparent separator and a bottom of the open groove, and a second sealing groove is formed between the transparent cover and the transparent partition, and the second sealing groove is filled with quantum dots to fix the LED wafer In the first sealing groove, the LED chip can be electrically connected to the outside of the open slot through the electrical conductor The device is electrically connected. Thus, compared with the conventional quantum dot LED, the present invention does not require a glass tube, and the quantum dots in the bracket, the LED chip and the second sealing groove can be welded as a whole structure to the power supply device, and the overall structure is simple, and the manufacturing process is simple. At the same time, the quantum dots in the second sealing groove are directly disposed above the LED wafer, and the quantum dots in the second sealing groove can be excited by the light, and the utilization rate is high.

DRAWINGS

Figure 1 is a front elevational view of a conventional quantum dot LED;

2 is a front elevational view of a quantum dot LED in an embodiment.

detailed description

Referring to FIG. 2, a quantum dot LED in an embodiment includes a bracket 110 having an open slot, an LED chip 120, a transparent spacer 130, a transparent cover 140, and an electrical conductor 150. The electrical conductor 150 passes through the open slot. The bottom is located at one end in the open slot and the other end is located outside the open slot. The transparent spacer 130 is disposed in the open slot and is fixedly connected to the bracket 110. The transparent cover 140 is disposed on the side of the transparent spacer 130 away from the LED chip 120 and is fixedly connected to the bracket 110. A first sealing groove a is formed between the transparent partition plate 130 and the bottom of the opening groove. The LED chip 120 is fixed in the bottom of the opening groove in the first sealing groove, and is electrically connected to the electric conductor 150. The transparent partition plate 130 and the transparent cover plate are transparently connected. A second sealing groove b is formed between 140, and the second sealing groove b is used to fill quantum dots of at least two sizes.

The bracket 110 is used to fix the LED wafer 120, the transparent spacer 130, and the transparent cover 140. The LED wafer 120 can emit colored light. Specifically, the transparent sealing plate 130 and the bracket 110, the transparent cover plate 140 and the bracket 110 can be fixedly sealed by using a conventionally known connection manner. For example, the transparent partition 130 and the transparent cover 140 can be chemically bonded. The seamless adhesive is fixed to the bracket 110.

The LED chip 120 is connected to an external power supply device through the conductor 150. Specifically, the one end of the conductor 150 outside the open slot is electrically connected to the power supply device, and the LED chip 120 can be powered to cause the LED chip 120 to emit light. In this embodiment, referring to FIG. 2 , the LED chip 120 is provided with a wire 121 electrically connected to the electrical conductor 150 , thereby achieving electrical connection between the LED chip 120 and the electrical conductor 150 .

The transparent spacer 130 refers to a colorless and transparent transparent partition, so that the colored light emitted by the LED chip 120 can be irradiated to the quantum dots in the second sealing groove b through the transparent spacer 130, and the quantum dots are on the LED chip. 120 colored light emitted by the excitation of the three primary colors, forming a high color gamut of white light. Similarly, the transparent cover 140 refers to a colorless and transparent cover plate, which does not affect the color of white light emitted by the quantum dots.

The quantum dot LED has a first sealing groove a formed by using the transparent spacer 130 and the bottom of the opening groove, and a second sealing groove b is formed between the transparent cover 140 and the transparent spacer 130, and the second sealing groove is filled with quantum The LED chip 120 is fixed in the first sealing groove a, and the LED chip 120 is electrically connected to the power supply device outside the open slot through the electrical conductor 150. In this way, compared with the conventional quantum dot LED, the present invention does not require a glass tube, and the quantum dots in the bracket 110, the LED wafer 120 and the second sealing groove b can be welded as a whole structure to the power supply device, and the overall structure is simple. The fabrication process is also simple; at the same time, the quantum dots in the second sealing groove b are directly disposed above the LED wafer 120, and the quantum dots in the second sealing groove b can be excited by light, and the utilization rate is high.

In an embodiment, the first sealing groove a is a vacuum chamber. In this way, the LED wafer 120 can be prevented from being oxidized, and the light-emitting effect of the LED wafer 120 can be improved. In this embodiment, the first sealing groove a is filled with glue, and the first sealing groove a can be processed into a vacuum chamber. It can be understood that in other embodiments, the first sealing groove a can also be processed into a vacuum cavity by other means.

In an embodiment, referring to FIG. 2, the cross section of the first sealing groove a and the second sealing groove b is an inverted isosceles trapezoid in a direction away from the bottom of the opening groove, and the symmetry of the two inverted isosceles trapezoids The axes coincide. Thus, the overall width of the second sealing groove b is made larger than the width of the first sealing groove a, so that the quantum dots in the second sealing groove b can absorb the light emitted from the LED wafer 120 at a wider angle.

In this embodiment, the contact surface of the bracket 110 and the first sealing groove a is provided with a protrusion 111, and the end of the bottom portion of the protrusion 111 away from the opening groove is fixedly and sealingly connected with the transparent partition plate 130. At this time, the maximum width of the first sealing groove a is smaller than the minimum width of the second sealing groove b, and the cross-sectional width of the transparent partition 130 is larger than the maximum width of the first sealing groove a and less than or equal to the minimum width of the second sealing groove b. . Thus, the bump 111 can function to support the transparent spacer 130, and can improve the stability of the connection between the transparent spacer 130 and the bracket 110, thereby improving the reliability of the quantum dot LED.

In this embodiment, the bracket 110 is a bracket provided with a recess 112 at an opening facing the open slot, and the transparent cover 140 is sealingly connected to the recess 112. In this way, the transparent cover 140 can be mounted on the bracket 110 for fixed sealing connection, and the stability of the connection between the transparent spacer 130 and the bracket 110 can be further improved, thereby further improving the reliability of the quantum dot LED.

In one embodiment, the bracket 110 is an EMC (Epoxy Molding Compound) stent or a PCT (poly(trimethylene terephthalate)) stent. The EMC bracket and the PCT bracket have good heat resistance and can improve the stability of the overall structure of the quantum dot LED. It will be appreciated that in other embodiments, the stent 110 can be of other types, such as a PPA (polyphthalamide) stent.

Specifically, in this embodiment, the bracket 110 is a white bracket. The walls of the first sealing groove a and the second sealing groove b are white supports. Since white can reflect light, by using a white bracket, absorption of light can be reduced, and light utilization efficiency can be improved.

In an embodiment, the LED wafer 120 is a blue LED wafer. The blue light has a shorter wavelength and a larger energy, and the blue light is less harmful to the human body than the violet light. Therefore, by using a blue LED chip, the luminous effect of the quantum dot LED can be improved under the premise of ensuring the safety of use. It will be appreciated that in other embodiments, LED wafers 120 that emit other colors in visible light may also be employed.

In an embodiment, the transparent spacer 130 and the transparent cover 140 are both glass sheets. The glass plate has good light transmittance and heat insulation, can enhance the refraction of light, and can improve the protection effect on the thermal insulation of the quantum dots, thereby further improving the luminous effect of the quantum dot LED.

In an embodiment, the electrical conductor 150 includes at least two sheets of metal. The metal piece is located at one end of the open slot to be electrically connected to the power supply device to improve the stability between the bracket 110 and the power supply device. At the same time, by using at least two metal pieces, it is avoided that one of the metal pieces cannot be electrically conductive. The caused LED chip 120 is powered off, which can improve the reliability of the electrical connection between the LED chip 120 and the power supply device.

In one embodiment, the quantum dot LED further includes a PCB board 160. One end of the bracket 110 at the bottom of the open slot is fixed to the PCB board 160, and one end of the conductor 150 outside the open slot is electrically connected to the PCB board 160. That is, in the present embodiment, the power supply device for supplying power to the LED chip 120 is the PCB board 160. Specifically, the PCB board 160 has built-in processing circuitry to ensure efficient operation of the LED wafer 120.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A quantum dot LED, comprising: an LED chip, a transparent separator, a transparent cover, an electrical conductor, and a bracket provided with an open slot, the electrical conductor passing through a bottom of the open slot, and one end is located at the Inside the open slot, the other end is located outside the open slot;

The transparent partition is disposed in the open slot and is fixedly and sealingly connected to the bracket, and the transparent cover is disposed on a side of the transparent partition away from the LED chip and is fixedly and sealingly connected to the bracket. a first sealing groove is formed between the transparent separator and the bottom of the opening groove, and the LED chip is fixed in the bottom of the opening groove in the first sealing groove, and is electrically connected to the electric conductor. A second sealing groove is formed between the transparent separator and the transparent cover, and the second sealing groove is used to fill quantum dots of at least two sizes.
The quantum dot LED of claim 1 wherein said transparent spacer and said transparent cover are both glass sheets.
The quantum dot LED according to claim 1, wherein a cross section of the first sealing groove and the second sealing groove is an inverted isosceles trapezoid in a direction away from a bottom of the open groove, and two The axes of symmetry of the inverted isosceles trapezoids coincide.
The quantum dot LED according to claim 3, wherein a bump is provided on a contact surface of the bracket and the first sealing groove, and the bump is away from a bottom end of the open groove and the transparent The partition is fixedly sealed.
The quantum dot LED according to claim 3, wherein the holder is a holder provided with a recess facing the opening of the opening groove, and the transparent cover is sealingly connected to the recess.
The quantum dot LED of claim 1 wherein said electrical conductor comprises at least two sheets of metal.
The quantum dot LED of claim 1 wherein the scaffold is an EMC scaffold or a PCT scaffold.
The quantum dot LED according to claim 1, further comprising a PCB board, wherein one end of the bracket at the bottom of the open slot is fixed to the PCB board, and the electrical conductor is located outside the open slot One end is electrically connected to the PCB board.