TWI608601B - Led module, led array module and display module - Google Patents

Description

Light-emitting diode module, light-emitting diode array module, display module

The invention relates to a light-emitting diode module, a light-emitting diode array module and a display module, in particular to a quantum dot film and a light-emitting diode which can generate blue or ultraviolet light, and can provide high-purity color light.

Traditional phosphors (Phosphor) still have many problems in making solid-colored LEDs, because traditional fluorescent materials have a wide half-width (50-120 nm), large stoke's shift (>100 nm), large particles, and scattering. Strong characteristics, which cause blue or violet light to turn into solid green and red light, can not completely absorb blue or violet light, and because the spectrum of light emission is too wide and wide, the color purity is insufficient, and it is not suitable for use as a display.

And because the quantum dot (Quantum dot) has a very narrow half-height width (<40 nm) of the light-emitting spectrum compared to the above-mentioned conventional fluorescent material, a large light absorption band, and a solid color of green light and red light can be easily obtained, and is suitable for use. For the display.

For example, there is a "light-emitting diode" of the Republic of China Patent Publication No. 201513391, which mainly comprises a substrate having a circuit structure and a reflective cup, a light-emitting diode wafer and a packaging material, and a light-emitting diode chip. And disposed on the bottom of the reflective cup of the substrate and electrically connected to the circuit structure of the substrate, the encapsulation material is disposed in the reflective cup of the substrate, and covers the LED chip, and the LED is a blue light emitting diode a polar body chip, the light emitting diode further comprising a quantum dot film disposed on the packaging material, wherein the quantum dot of the quantum dot film may be a first type quantum dot or a second A type of quantum dot that emits red light when excited by blue light, and the second type of quantum dot emits green light when excited by blue light.

However, there are still some shortcomings in the above-mentioned previous cases to be improved. The main reason is that although the quantum dots can be red or green after being excited by blue light, in fact, some blue light will directly penetrate the quantum dot film. Part of the blue light is mixed with the generated red or green light, so the high-purity light is not accurately produced, and there is still room for improvement.

In particular, for LED displays, since RGB three primary colors are required to present a full-color picture, if high-purity green or red light cannot be provided, the development quality cannot be improved. Although pure color light can be provided directly from wafers of different colors, different color chips require different driving and control methods, so that the display is expensive and difficult to mass-produce.

Furthermore, although the current blue wafer (or purple, 400 nm to 470 nm) is efficient and inexpensive, there are still technical problems to be overcome between green and red wafers, in which green wafers are limited by materials. The choice problem (also known as green gap), so the efficiency, color purity and reliability is not good, as the efficiency of the red chip can reach a good level, but the process yield is low, and the color is severe.

Therefore, if only a blue light wafer can be used as a light source, and a green light or a red light emitting diode with a higher solid color can be provided, the display quality, efficiency, and yield of the display can be improved, and the price will be more. Competitive advantage.

Therefore, in order to enable the light-emitting diode module to generate high-purity light, the present inventors have proposed a light-emitting diode module capable of providing high-purity color light, comprising: a light-emitting diode for generating ultraviolet light or blue light. And a quantum dot film comprising a first surface and a second surface opposite to the first surface, the first surface adjacent to the light emitting diode, the quantum dot film being a red quantum dot film or a green quantum a film that is excited by the ultraviolet light or the blue light to generate red or green light; and a filter member adjacent to the second of the quantum dot film The surface is for reflecting the ultraviolet light or blue light and allowing the red light or the green light to pass to provide high purity green or red light.

Further, the quantum dot film contains 0.1% by weight to 3% by weight of the plurality of scattering particles, and the scattering particles have a particle diameter of 10 nm to 1000 nm.

Further, the quantum dot film has a thickness of from 5 μm to 1000 μm.

Further, the first surface of the quantum dot film is provided with a first adhesive layer for bonding a waterproof layer.

Further, a second adhesive layer is disposed on the second surface of the quantum dot film to adhere the filter.

Further, the filter comprises a transparent substrate and a filter layer coated on the transparent substrate.

The invention is also a light-emitting diode module capable of providing high-purity color light, comprising: a light-emitting diode for generating ultraviolet light or blue light; a quantum dot film comprising a first surface and a second surface opposite The first surface is adjacent to the light emitting diode, and the quantum dot film is used to be excited by the ultraviolet light or the blue light to generate light of a predetermined wavelength range; and a filter member adjacent to the quantum The second side of the dot film is configured to reflect the ultraviolet light or blue light and allow light of the predetermined wavelength range to pass to increase the purity of the light of the predetermined wavelength range.

The invention also relates to a light-emitting diode array module, comprising: a light-emitting diode, a quantum dot film and a filter, the light-emitting diode is used for generating ultraviolet light or blue light, and the quantum dot film comprises a The first surface and the second surface are opposite to the first surface, the first surface is adjacent to the light emitting diode, and the quantum dot film is a red light quantum dot film, and is excited by the ultraviolet light or the blue light to generate red Light, the filter is adjacent to the second side of the quantum dot film for reflecting the ultraviolet light or blue light and allowing the red light to pass to provide high purity red light; a second LED module includes a light emitting diode, a quantum dot film and a filter, wherein the light emitting diode is used to generate ultraviolet light or blue light, and the quantum dot film comprises a first surface, And the second surface is opposite to the first surface, the first surface is adjacent to the light emitting diode, and the quantum dot film is a green light quantum dot film, and is excited by the ultraviolet light or the blue light to generate green light. The light member is adjacent to the second surface of the quantum dot film for reflecting the ultraviolet light or blue light and allowing the green light to pass to provide high-purity green light; and a third light-emitting diode module comprising a light-emitting diode The polar body is used to generate ultraviolet light or blue light.

The present invention is also a display module comprising the above-mentioned light emitting diode array module, the display module comprising at least three light emitting diode array modules, and the spacing of adjacent light emitting diode array modules The size is equivalent to the size of the Small Pixel Pitch Displays.

According to the above technical features, the following effects can be achieved:

1. When the blue light or ultraviolet light of the light emitting diode module penetrates the quantum dot film, it can be reflected by the filter element to the quantum dot film, and the quantum dot of the quantum dot film is re-excited to generate red. Light or green light to provide high-purity red or green light.

2. It is suitable for small pitch display with high precision.

(1) ‧‧‧Lighting diodes

(2) ‧ ‧ quantum dot film

(21) ‧ ‧ first side

(211)‧‧‧First bonding layer

(22) ‧‧‧ second side

(221)‧‧‧Second adhesion layer

(201)‧‧‧ scattering particles

(202) ‧ ‧ quantum dots

(3) ‧‧‧Filters

(31) ‧‧‧Transparent substrate

(32) ‧‧‧Filter layer

(4) (40) ‧ ‧ waterproof layer

(100)‧‧‧Light Diode Array Module

(10A)‧‧‧First LED Module

(10B)‧‧‧Second light-emitting diode module

(10C)‧‧‧3rd LED Module

(A) ‧‧‧Substrate

(B) ‧‧‧Diffuser film

[First Figure] is a side view of an embodiment of the present invention.

[Second figure] is a side view showing another embodiment of the present invention.

[Third A] is a spectrum diagram of the embodiment of the present invention for generating green light.

[Third B] is a chromaticity coordinate map for generating green light according to an embodiment of the present invention.

[Fourth A] is a spectrum diagram of the red light produced by the embodiment of the present invention.

[Fourth B] is a chromaticity coordinate map of the embodiment of the present invention for generating red light.

[Fifth Figure] is a side view showing a light emitting diode array module according to still another embodiment of the present invention.

[Sixth Figure] is a side view showing still another embodiment of the present invention.

In combination with the above technical features, the main functions of the LED module, the LED array module and the display module of the present invention will be clearly shown in the following embodiments. Elements that are similar in the following description will be described by the same symbols.

Please refer to the first figure, which discloses a light emitting diode module according to an embodiment of the invention, comprising: a light emitting diode (1), a quantum dot film (2), and a filter (3), wherein The light-emitting diode (1) is a blue light-emitting diode or an ultraviolet light-emitting diode.

The quantum dot film (2) includes a first surface (21) and a second surface (22) opposite to the first surface (21), the first surface (21) adjacent to the light emitting diode (1) The quantum dot film (2) is a red light quantum dot film or a green light quantum dot film which is excited by the ultraviolet light or the blue light to generate red light or green light.

In detail, the quantum dot film (2) has a thickness of 5 μm to 1000 μm. The quantum dot film (2) comprises 0.1% by weight to 3% by weight of the plurality of scattering particles (201) and 0.1% by weight to 20% by weight of the quantum dots (202), and the scattering particles (201) have a particle diameter of 10 nm to 1000 nm. By selecting quantum dots (202) of appropriate particle size, specific red or green light can be generated. However, the choice of the material type and particle size of the quantum dots is not the focus of this case. For details, for example, refer to the Republic of China Patent Publication No. 201513391. Related documents such as "light-emitting diodes" are not described here.

The filter (3) is adjacent to the second surface (22) of the quantum dot film (2) for reflecting the ultraviolet light or blue light and allowing the red light or the green light to pass to provide high-purity green light. Or red light. In detail, the filter (3) is a color filter (Dichroic Filters), for example, a long band pass filter, which can pass light of a predetermined small range of wavelengths, and reflects other The filter (3) includes a transparent substrate (31) and a filter layer (32). The transparent substrate (31) is made of a light-transmitting material such as glass or acryl. The optical layer (32) is coated on the transparent substrate (31) by, for example, vapor deposition.

Preferably, the first surface (21) of the quantum dot film (2) is provided with a first adhesive layer (211) for bonding the light emitting diode (1), and the quantum dot film (2) The second side (22) is provided with a second adhesive layer (221) and a waterproof layer (4) for preventing the quantum dot film (2) from being damaged by the waterproof layer (4). Please refer to the second figure. It should be added that the waterproof layer (4) is not limited to one layer, nor is it limited to the second adhesive layer adhered to the second surface (22) of the quantum dot film (2). (221) may be located between the transparent substrate (31) of the filter (3) and the filter layer (32).

The experimental data continues with reference to the third A picture. As can be seen from the third A picture, the blue light generated by the light-emitting diode module having the green light quantum dot film of the present embodiment is much lower than that of the control group (the filter without the foregoing filter element). Therefore, high-purity green light can be provided, and the chromaticity coordinate map should be matched with the third B-picture.

For another experimental data, please refer to FIG. 4A. As can be seen from FIG. 4A, the blue light generated by the light-emitting diode module having the red light quantum dot film of the present embodiment is much lower than that of the control group (the filter is not provided). Therefore, high-purity red light can be provided, and the chromaticity coordinate map should be matched with the fourth B-picture.

It should be noted that the above embodiment is exemplified by a red quantum dot film or a green quantum dot film, but not limited thereto, and the quantum dot film can be excited by the ultraviolet light or the blue light to generate a predetermined wavelength. The range of light is not limited to red or green light, as long as the particle size of the quantum dot film is adjusted, and the filter member selects different kinds to reflect the ultraviolet light or blue light and allows The passage of light of the predetermined wavelength range can also achieve the purpose of improving the purity of the light in the predetermined wavelength range.

A further embodiment of the present invention is provided with a light-emitting diode array module (100) disposed between a substrate (A) and a diffusion film (B). The LED array module (100) includes a first LED module (10A), a second LED module (10B), and a third LED module (10). 10C), wherein the first light emitting diode module (10A) and the second light emitting diode module (10B) are the light emitting diode module (10), but the first light emitting diode module The quantum dot film (2) of the group (10A) is a red light quantum dot film, and the quantum dot film (2) of the second light emitting diode module (10B) is a green light quantum dot film. As for the third LED module (10C), it is blue or purple. The light-emitting diode (1) of the external light is used to generate ultraviolet light or blue light, thereby achieving the purpose of providing high-purity red, green and blue light, and precisely mixing the light of the desired color. It should be particularly noted that the present embodiment is suitable for a display module, in particular, a small pitch display having a higher accuracy of color mixing, the display module including a plurality of LED arrays (100) And the spacing size of the adjacent LED array modules is equivalent to the specification of the small pitch display.

Moreover, as shown in the sixth embodiment, in another embodiment of the present invention, the main difference is that the two sides of the light-emitting diode module are respectively provided with a waterproof layer (40) to block the outside water and moisture, thereby avoiding The quantum dot film (2) is damaged by moisture.

In view of the foregoing description of the embodiments, the operation and the use of the present invention and the effects of the present invention are fully understood, but the above described embodiments are merely preferred embodiments of the present invention, and the invention may not be limited thereto. Included within the scope of the present invention are the scope of the present invention.

(1) ‧‧‧Lighting diodes

(2) ‧ ‧ quantum dot film

(21) ‧ ‧ first side

(211)‧‧‧First bonding layer

(22) ‧‧‧ second side

(221)‧‧‧Second adhesion layer

(201)‧‧‧ scattering particles

(202) ‧ ‧ quantum dots

(3) ‧‧‧Filters

(31) ‧‧‧Transparent substrate

(32) ‧‧‧Filter layer

(4) ‧ ‧ waterproof layer

Claims (10)

A light emitting diode module comprising: a light emitting diode for generating ultraviolet light or blue light; a quantum dot film comprising a first surface and a second surface opposite to the first surface, the first surface Adjacent to the light emitting diode, the quantum dot film is a red light quantum dot film or a green light quantum dot film, which is excited by the ultraviolet light or the blue light to generate red light or green light; and a filter member adjacent to The second side of the quantum dot film is for reflecting the ultraviolet light or blue light and allowing the red light or the green light to pass. The light-emitting diode module according to claim 1, wherein the quantum dot film comprises 0.1% by weight to 3% by weight of the plurality of scattering particles, and the scattering particles have a particle diameter of 10 nm to 1000 nm. The light-emitting diode module according to claim 1, wherein the quantum dot film has a thickness of 5 μm to 1000 μm. The light-emitting diode module of claim 1, further comprising a waterproof layer disposed on the quantum dot film. The light-emitting diode module of claim 1 is provided with a waterproof layer on both sides of the light-emitting diode module. The light-emitting diode module of claim 1, wherein the filter comprises a transparent substrate and a filter layer is coated on the transparent substrate. A light emitting diode module comprising: a light emitting diode for generating ultraviolet light or blue light; a quantum dot film comprising a first surface and a second surface opposite to the first surface, the first surface Adjacent to the light emitting diode, the quantum dot film is used to be excited by the ultraviolet light or the blue light to generate light of a predetermined wavelength range; and a filter member adjacent to the second side of the quantum dot film for reflecting the ultraviolet light or blue light and allowing light of the predetermined wavelength range to pass. A light-emitting diode array module includes: a first light-emitting diode module, comprising a light-emitting diode, a quantum dot film and a filter, wherein the light-emitting diode is used to generate ultraviolet light or blue light The quantum dot film includes a first surface and a second surface opposite to the first surface, the first surface is adjacent to the light emitting diode, and the quantum dot film is a red light quantum dot film to receive the ultraviolet light Or the blue light is excited to generate red light, the filter is adjacent to the second surface of the quantum dot film for reflecting the ultraviolet light or blue light and allowing the red light to pass through; a second light emitting diode module includes a light emitting diode, a quantum dot film and a filter, the light emitting diode is used to generate ultraviolet light or blue light, the quantum dot film includes a first surface, and a second surface opposite to the first surface, The first surface is adjacent to the light emitting diode, and the quantum dot film is a green light quantum dot film, and is excited by the ultraviolet light or the blue light to generate green light, and the filter member is adjacent to the second quantum dot film. a surface for reflecting the ultraviolet light or blue light and allowing the green light to pass through; and a third light emitting diode module It comprises a light emitting diode for generating ultraviolet light or blue light. The light-emitting diode array module of claim 8, wherein the first light-emitting diode module and the second light-emitting diode module further comprise a waterproof layer disposed thereon Above the quantum dot film. A display module, comprising the light emitting diode array module of any one of claim 8 to claim 9, wherein the display module comprises a plurality of the light emitting diode array modules, and adjacent plural The pitch size of the aforementioned light-emitting diode array module is equivalent to the specification of a small pitch display.