CN113035077A - Quantum dot lamp bead and LED display screen - Google Patents

Abstract

The invention discloses a quantum dot lamp bead and an LED display screen, wherein the quantum dot lamp bead comprises: the encapsulation casing, be provided with in the encapsulation casing: a backlight having a light emitting wafer, a quantum dot layer disposed over the light emitting wafer, and a quantum dot enhancement film disposed over the quantum dot layer; the lower polarizing plate is arranged above the backlight source; the TFT substrate is arranged above the lower polarizer; a crystal layer disposed above the TFT substrate; a color filter substrate disposed above the crystal layer; and an upper polarizing plate disposed above the color filter substrate. In the quantum dot lamp bead of the first aspect of the invention, the backlight source with the quantum dot layer is arranged in the packaging shell of the lamp bead, and the light is emitted through the quantum dots, so that the light-emitting quality of the lamp bead can be improved.

Description

Quantum dot lamp bead and LED display screen

Technical Field

The invention relates to the technical field of display, in particular to a quantum dot lamp bead and an LED display screen.

Background

The LED lamp bead is one of core components of the LED display screen. The method plays a leading role in influencing the quality of the LED display screen. Traditional LED lamp pearl is because the restriction of luminescent crystal itself (for example material itself), and the colour gamut of the light that can send is very little, and this has directly influenced the luminous quality of LED display screen.

With the maturity of the quantum dot technology, the application of the quantum dot technology to liquid crystal display products is more and more abundant. Because the quantum dot material can emit nearly continuous spectrum, namely, the color displayed by the quantum dot can be finer and smoother, the color gamut can be wider, the light can be softer, and the like. However, due to manufacturing processes and the like, quantum dot technology has not been applied to LED display screens on a large scale.

Disclosure of Invention

The invention aims to solve at least one of the technical problems of the LED lamp bead in the prior art to a certain extent. Therefore, the invention provides the quantum dot lamp bead which can improve the light-emitting quality of the lamp bead. In addition, the invention also provides an LED display screen using the quantum dot lamp bead.

The quantum dot lamp bead according to the embodiment of the first aspect of the invention comprises: the encapsulation casing, be provided with in the encapsulation casing: a backlight having a light emitting wafer, a quantum dot layer disposed over the light emitting wafer, and a quantum dot enhancement film disposed over the quantum dot layer; the lower polarizing plate is arranged above the backlight source; the TFT substrate is arranged above the lower polarizer; a crystal layer disposed above the TFT substrate; a color filter substrate disposed above the crystal layer; and an upper polarizing plate disposed above the color filter substrate.

The quantum dot lamp bead according to the first aspect of the invention has at least the following beneficial effects: because set up the backlight that has the quantum dot layer in the packaging shell of lamp pearl, give off light through the quantum dot, consequently, can improve the luminous quality of lamp pearl.

In some embodiments, the backlight further has a diffuser plate disposed between the light emitting wafer and the quantum dot layer.

In some embodiments, the light emitting wafer is a blue light emitting wafer, and the quantum dots emitting green light and the quantum dots emitting red light are distributed in the quantum dot layer.

In some embodiments, the TFT substrate includes: a first substrate; an ITO-TFT layer disposed on the first substrate; and the first alignment film is arranged on the ITO-TFT layer.

In some embodiments, the color filter substrate includes: a second substrate; the color filter film is arranged on the second substrate; the ITO layer is arranged on the color filter film; and a second alignment film disposed on the ITO layer.

In some embodiments, the color filter includes: a blue filter, a red filter, and a green filter.

In some embodiments, a filler is disposed above the upper polarizer.

In some embodiments, the material of the filler is an epoxy.

According to the second aspect of the invention, the LED display screen comprises: a lamp panel; a plurality of above-mentioned any quantum dot lamp pearls of above-mentioned, quantum dot lamp pearl is adorned respectively the lamp plate.

The LED display screen according to the second aspect of the invention has at least the following advantages: because the lamp beads which emit light through the sub-points are used, the light-emitting quality of the LED display screen can be improved.

In some embodiments, the lamp panel is provided with a pad, and the quantum lighting beads are welded on the pad.

Drawings

Fig. 1 is a schematic perspective view of a structure of one embodiment of a quantum dot lamp bead of the present invention.

Fig. 2 is a schematic plan view of a quantum dot lamp bead of the present invention.

FIG. 3 is a schematic diagram of an LED display screen.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Fig. 1 and 2 are a schematic perspective view and a schematic plan view of a quantum dot lamp bead 100, respectively. Referring to fig. 1 and 2, a quantum dot lamp bead 100 according to an embodiment of the first aspect of the present invention includes: encapsulation casing 101, be provided with in the encapsulation casing 101: a backlight 102, a lower polarizer 103, a TFT substrate 104(Thin Film transistor), a crystal layer 105, a color filter substrate 106, and an upper polarizer 107. The backlight 102 includes a light emitting wafer 108, a quantum dot layer 109 disposed above the light emitting wafer 108, and a quantum dot enhancement film 110(QDEF) disposed above the quantum dot layer 109. The lower polarizing plate 103 is disposed above the backlight 102. The TFT substrate 104 is disposed above the lower polarizing plate 103. The crystal layer 105 is disposed above the TFT substrate 104. The color filter substrate 106 is disposed above the crystal layer 105. The upper polarizer 107 is disposed above the color filter substrate 106.

In this embodiment, since the backlight 102 having the quantum dot layer 109 is provided in the package case 101 of the lamp bead, and light is emitted through the quantum dot layer 109, the light emission quality of the lamp bead can be improved.

In particular, since quantum dots are minute semiconductor particles, light emitted therefrom has a narrow spectral shape and a wavelength depending on their size. Therefore, compared with other light emitting technologies of the LED display screen, the quantum dots can provide a wider range of pure colors and a wider color gamut. By applying the quantum dot layer 109 to the lamp beads of the LED display screen, the light emission of the lamp beads is softer and finer, the color gamut can be wider, and the light emission quality of the lamp beads can be greatly improved.

Further, by arranging the lower polarizer 103, the TFT substrate 104, the crystal layer 105, the color filter substrate 106 and the upper polarizer 107, the brightness and color of light emitted from the lamp beads can be controlled, and different display effects and gray scale effects can be realized.

For example, in some embodiments, the light emitting wafer 108 is a blue light emitting wafer, and green light emitting quantum dots and red light emitting quantum dots are distributed in the quantum dot layer 109. The blue light emitting chip of the backlight 102 emits light from bottom to top, and the emitted light is converted into red light and green light by repeating reflection and passing through the quantum dot enhancement film 110 more times as it travels into the quantum dot layer 109, and combined with the blue light of the blue light emitting chip into pure white light. After the pure white light passes through the lower polarizer 103, a light wave having a vibration direction identical to the projection direction of the lower polarizer 103 passes through the lower polarizer 103. The pure white light passing through the lower polarizer 103 enters the TFT substrate 104 and continues into the crystal layer 105. The direction of rotation of the molecules of the crystal layer 105 is controlled by changing the signal and voltage of the TFT substrate 104. The refracted light passes through the color filter substrate 106, and then, for example, red, green, and blue light is generated. Since only one of the rays enters the crystal layer 105 after passing through the lower polarizer 103, and the rays are refracted through the crystal layer 105 to generate rays in different directions, the rays passing through the upper polarizer 107 become a light wave again by disposing the upper polarizer 107. Therefore, the size of the white light passing through can be adjusted, and the adjustment of the brightness is realized. In addition, by adjusting the size of red, green and blue light, light of different colors can be combined.

In some embodiments, in order to make the light emitted from the light emitting wafer 108 more uniform, the backlight 102 further has a diffuser plate 111, and the diffuser plate 111 is disposed between the light emitting wafer 108 and the quantum dot layer 109. Specifically, by providing the diffusion plate 111, light is uniformly distributed to each region of the quantum dot layer 109, thereby providing brighter, uniform light.

In some embodiments, the TFT substrate 104 includes: a first substrate 112, an ITO (Indium tin oxide) -TFT layer 113, and a first alignment film 114. The first substrate 112 is, for example, a glass substrate. The ITO-TFT layer 113 is disposed on the first substrate 112, and the voltage of the TFT substrate 104 is changed by the ITO-TFT layer 113. The first alignment film 114 is disposed on the ITO-TFT layer 113. Further, the detailed structure and function of the TFT substrate 104 may be provided with reference to the TFT substrate of the liquid crystal display device, and will not be described in detail herein.

In some embodiments, the color filter substrate 106 includes: a second substrate 115, a color filter 116, an ITO layer 117, and a second alignment film 118. The second substrate 115 is, for example, a glass substrate. The color filter 116 is provided over the second substrate 115. The ITO layer 117 is disposed on the color filter film 116, and the voltage of the color filter substrate 106 is changed by the ITO layer 117. A second alignment film 118 is disposed on the ITO layer 117.

In some embodiments, the color filter 116 includes: a blue filter, a red filter, and a green filter.

In addition, the detailed structure and function of the color filter substrate 106 may be set with reference to the color filter substrate 106 of the image display device, and will not be described in detail herein.

The TFT substrate 104 and the color filter substrate 106 sandwich the crystal layer 105. Specifically, the TFT substrate 104 and the color filter substrate 106 sandwich the crystal layer 105 with their alignment films facing the crystal layer 105, respectively. That is, the first alignment film 114 of the TFT substrate 104 and the second alignment film 118 of the color filter substrate 106 are respectively opposed to the crystal layer 105.

In some embodiments, the components disposed in the package case 101 are prevented from colliding or fine dust or the like from entering the package case 101. Above the upper polarizer 107, a filler 119 is provided. Specifically, the material of the filler 119 is, for example, epoxy resin. More specifically, the filler 119 is, for example, an epoxy board.

Fig. 3 is a schematic diagram of an LED display 200, and referring to fig. 3 and with additional reference to fig. 2, the quantum dot lamp bead 100 of the above embodiments can be applied to the LED display 200. The LED display screen 200 according to the second aspect of the embodiment of the present invention comprises: lamp plate 201 and a plurality of quantum dot lamp pearl 100. The quantum dot lamp beads 100 are respectively installed on the lamp panels 201.

In this embodiment, since the lamp beads that emit light by passing through the sub-dots are used, the light emitting quality of the LED display 200 can be improved.

In some embodiments, the lamp panel 201 is provided with a pad 202, and the quantum dot lamp bead 100 is welded to the pad 202. Specifically, the quantum dot lamp bead 100 is mounted on the pad 202, for example, by means of patch soldering. In this embodiment, the quantum dot lamp beads 100 can be mounted on the lamp panel 201 by, for example, a chip-on-board soldering method, so that the LED display screen 200 having the quantum dot lamp beads 100 can be more largely assembled compared to a liquid crystal display panel.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. Quantum dot lamp pearl, its characterized in that includes:

the encapsulation casing, be provided with in the encapsulation casing:

a backlight having a light emitting wafer, a quantum dot layer disposed over the light emitting wafer, and a quantum dot enhancement film disposed over the quantum dot layer;

the lower polarizing plate is arranged above the backlight source;

the TFT substrate is arranged above the lower polarizer;

a crystal layer disposed above the TFT substrate;

a color filter substrate disposed above the crystal layer;

and an upper polarizing plate disposed above the color filter substrate.

2. The quantum dot lamp bead of claim 1, wherein the backlight source further has a diffuser plate disposed between the light emitting wafer and the quantum dot layer.

3. The quantum dot lamp bead of claim 1, wherein the light emitting wafer is a blue light emitting wafer, and green light emitting quantum dots and red light emitting quantum dots are distributed in the quantum dot layer.

4. The quantum dot lamp bead of claim 1, wherein the TFT substrate comprises:

a first substrate;

an ITO-TFT layer disposed on the first substrate;

and the first alignment film is arranged on the ITO-TFT layer.

5. The quantum dot lamp bead of claim 1, wherein the color filter substrate comprises:

a second substrate;

the color filter film is arranged on the second substrate;

the ITO layer is arranged on the color filter film;

and a second alignment film disposed on the ITO layer.

6. The quantum dot lamp bead of claim 5, wherein the color filter comprises: a blue filter, a red filter, and a green filter.

7. The quantum dot lamp bead of claim 1, wherein a filling member is disposed above the upper polarizer.

8. The quantum dot lamp bead of claim 7, wherein the filler is made of epoxy resin.

An LED display screen, comprising:

a lamp panel;

a plurality of quantum dot lamp beads of any one of claims 1 to 8, each of which is mounted to the lamp panel.

10. The LED display screen of claim 9, wherein the lamp panel is provided with pads to which the quantum lighting beads are soldered.

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