TW201839431A - Quantum dot backlight module comprising a diffusion sheet and a light source group opposite to a surface of the diffusion sheet - Google Patents

Abstract

This invention discloses a quantum dot backlight module comprising a diffusion sheet and a light source group opposite to a surface of the diffusion sheet, wherein the light source group comprises a printed circuit board, a plurality of light emitting diodes operatively mounted on the printed circuit board by a support frame, and a plurality of optical lenses which are arranged on the printed circuit board and cover the corresponding light emitting diodes; and the backlight module further comprises a quantum dot film which is attached to the outer side surfaces of the optical lenses so that rays emitted from the light emitting diodes excite a quantum dot material in the quantum dot film.

Description

   Quantum dot backlight module   

A quantum dot backlight module.

At present, the light source parts of the LED LCD TVs on the market are blue LEDs and yellow phosphors to achieve white light output. Such a method has too wide a red and green wave width in the spectrum chart, so that it cannot match the OLED LCD TV in the color gamut.

A quantum dot backlight module includes a diffusion sheet and a light source group opposite to a surface of the diffusion sheet. The light source group includes a printed circuit board and a plurality of operatively mounted on the printed circuit board through a bracket. And a plurality of optical lenses disposed on the printed circuit board and covering the corresponding light-emitting diodes, the backlight module further includes: a quantum dot film, the quantum dot film is attached to the optical On the outside surface of the lens, the light emitted from the light emitting diode excites the quantum dot material in the quantum dot film.

10‧‧‧light guide

20‧‧‧Light source set

30, 40, 50, 60, 710, 720 ‧ ‧ quantum dot films

31‧‧‧Reflective film

70‧‧‧ diffuser

71, 72‧‧‧ surface

200‧‧‧printed circuit board

201‧‧‧light-emitting diode

202‧‧‧optical lens

203‧‧‧Scaffold

204‧‧‧Circuit Track

1 and 2 are diagrams showing a first embodiment of the present invention; FIG. 3 is a diagram showing a second embodiment of the present invention; FIG. 4 is a diagram showing a third embodiment of the present invention; FIG. 5 is 6 is a schematic diagram showing a fourth embodiment of the present invention; FIG. 7 is a schematic diagram showing a sixth embodiment of the present invention; and FIG. 8 is a schematic diagram showing the sixth embodiment of the present invention; A schematic view of a seventh embodiment.

1 and 2 are schematic views showing a first embodiment of the present invention, and schematically showing a light guide sheet (diffusion sheet) 10, a light source group 20, a quantum dot film 30 in a quantum dot backlight module of the present invention, and Reflective film 31. The quantum dot backlight module of this embodiment is an edge-lit backlight module. Except for the light guide sheet 10, the light source group 20, the quantum dot film 30, and the reflective film 31, components such as other optical films included in the conventional edge-lit backlight module are not included in this application. The features are not directly related to the features of this application. For the sake of brevity, they are not shown in the drawings and detailed descriptions thereof will not be repeated in the description.

The light source group 20 includes a printed circuit board 200, a plurality of light emitting diodes 201 operatively mounted on the printed circuit board 200 via a bracket 203 and electrically connected to a circuit track 204 on the printed circuit board 200, and a number of An optical lens 202 is disposed on the printed circuit board 200 and covers the corresponding light emitting diode 201. In this embodiment, the light source group 20 is disposed on one side of the light guide sheet 10.

The quantum dot film 30 is a light transmissive film doped with red and green quantum dot materials and is attached to the light guide sheet 10 on a side opposite to the light source group 20. Then, the reflective film 31 is attached to the quantum dot film 30 so that when the light source group 20 is actuated to emit light, the light reaches the quantum dot film 30 through the light guide sheet 10 and excites the quantum in the quantum dot film 30. The dot material is reflected by the reflective film 31 again. In this way, the narrow wave widths of red and green can be obtained on the spectrogram, and the color gamut can be comparable to that of OLED LCD TVs.

FIG. 3 is a schematic diagram showing a second embodiment of the present invention. Different from the first embodiment, in this embodiment, a quantum dot film 30 and a reflective film 31 are attached on each side of the light guide sheet 10.

FIG. 4 is a schematic diagram showing a third embodiment of the present invention. The quantum dot backlight module of this embodiment is a direct type backlight module. In FIG. 4, one of the light-emitting diodes 201 and the optical lens 202 in the light source group 20 facing one surface of a diffusion sheet 70 is enlarged and displayed. Different from the first and second embodiments, in this embodiment, a quantum dot film 40 is attached to the outer surface of the optical lens 202. Therefore, the light emitted from the light emitting diode 201 excites the quantum dot film 40. Quantum dot material. In this way, the narrow wave widths of red and green can be obtained on the spectrogram, and the color gamut can be comparable to that of OLED LCD TVs.

FIG. 5 is a schematic diagram showing a fourth embodiment of the present invention. The quantum dot backlight module of this embodiment is a direct type backlight module. In FIG. 5, one of the light-emitting diodes 201 and the optical lens 202 in the light source group 20 facing one surface of a diffusion sheet 70 is enlarged and displayed. Different from the third embodiment, in this embodiment, a quantum dot film 50 is attached to the inner surface of the optical lens 202. Therefore, the light emitted from the light emitting diode 201 excites the quantum in the quantum dot film 50 Point material. In this way, the narrow wave widths of red and green can be obtained on the spectrogram, and the color gamut can be comparable to that of OLED LCD TVs.

FIG. 6 is a schematic diagram showing a fifth embodiment of the present invention. The quantum dot backlight module of this embodiment is a direct type backlight module. In FIG. 5, one of the light-emitting diodes 201 and the optical lens 202 in the light source group 20 facing one surface of a diffusion sheet 70 is enlarged and displayed. Different from the third and fourth embodiments, in this embodiment, a quantum dot film 60 is attached to the light emitting surface of the light emitting diode 201, and therefore, the light emitted from the light emitting diode 201 excites the quantum dots. Quantum dot material in thin film 60. In this way, the narrow wave widths of red and green can be obtained on the spectrogram, and the color gamut is comparable to that of OLED LCD TVs.

FIG. 7 is a schematic diagram showing a sixth embodiment of the present invention. The quantum dot backlight module of this embodiment is a direct type backlight module. In FIG. 7, one of the light emitting diodes 201 and the optical lens 202 in the light source group 20 is enlarged and displayed. Different from the third to fifth embodiments, in this embodiment, the surface 71 of the diffusion sheet 70 facing the light source group 20 has a plurality of pits with a quantum dot film 710 attached on the surface. The light emitted by the polar body 201 excites the quantum dot material in the quantum dot film 710. In this way, the narrow wave widths of red and green can be obtained on the spectrogram, and the color gamut can be comparable to that of OLED LCD TVs.

FIG. 8 is a schematic diagram showing a seventh embodiment of the present invention. The quantum dot backlight module of this embodiment is a direct type backlight module. In FIG. 8, one of the light emitting diodes 201 and the optical lens 202 in the light source group 20 is enlarged and displayed. Different from the third to sixth embodiments, in this embodiment, a surface 72 of a diffusion sheet 70 opposite to the surface 71 facing the light source group 20 has a plurality of pits with a quantum dot film 720 attached on the surface. Therefore, the light emitted from the light emitting diode 201 excites the quantum dot material in the quantum dot thin film 720. In this way, the narrow wave widths of red and green can be obtained on the spectrogram, and the color gamut can be comparable to that of OLED LCD TVs.

Claims (7)

    A quantum dot backlight module includes a light guide sheet and a light source group placed on one side of the light guide sheet. The quantum dot backlight module further includes a quantum dot film, which is doped with red. A light-transmitting film with a green quantum dot material is attached to the light guide plate on the side opposite to the light source group; and a reflective film is attached to the quantum dot film so that when the light source When the group is actuated to emit light, the light reaches the quantum dot film through the light guide plate and excites the quantum dot material in the quantum dot film. The narrow wave widths of red and green on the spectrogram can be obtained, which makes it compatible with the OLED liquid crystal in the color gamut TV is comparable.         For example, the quantum dot backlight module of claim 1 further includes three quantum dot films each attached to a corresponding one of the other three sides of the light guide plate, and three quantum dots each attached to a corresponding quantum. Dot the reflective film on the film.         A quantum dot backlight module includes a diffusion sheet and a light source group opposite to a surface of the diffusion sheet. The light source group includes a printed circuit board and a plurality of operatively mounted on the printed circuit board through a bracket. And a light emitting diode electrically connected to a circuit track on the printed circuit board, and a plurality of optical lenses disposed on the printed circuit board and covering the corresponding light emitting diode, the backlight module further includes a quantum dot Thin film, the quantum dot film is attached to the outer surface of the optical lens, so that the light emitted from the light emitting diode excites the quantum dot material in the quantum dot film, thereby obtaining red and green The narrow wavelength makes it comparable to OLED LCD TVs in the color gamut.         A quantum dot backlight module includes a diffusion sheet and a light source group opposite to a surface of the diffusion sheet. The light source group includes a printed circuit board and a plurality of operatively mounted on the printed circuit board through a bracket. And a light emitting diode electrically connected to a circuit track on the printed circuit board, and a plurality of optical lenses disposed on the printed circuit board and covering the corresponding light emitting diode, the backlight module further includes a quantum dot Thin film, the quantum dot film is attached to the inner surface of the optical lens, so that the light emitted from the light emitting diode excites the quantum dot material in the quantum dot film, thereby obtaining red and green The narrow wavelength makes it comparable to OLED LCD TVs in the color gamut.         A quantum dot backlight module includes a diffusion sheet and a light source group opposite to a surface of the diffusion sheet. The light source group includes a printed circuit board and a plurality of operatively mounted on the printed circuit board through a bracket. And a light emitting diode electrically connected to a circuit track on the printed circuit board, and a plurality of optical lenses disposed on the printed circuit board and covering the corresponding light emitting diode, the backlight module further includes a quantum dot A thin film, the quantum dot film is attached to the light emitting surface of the light emitting diode, so that the light emitted from the light emitting diode excites the quantum dot material in the quantum dot film. In this way, the narrow wave widths of red and green can be obtained on the spectrogram, and the color gamut can be comparable to that of OLED LCD TVs.         A quantum dot backlight module includes a diffusion sheet and a light source group facing one surface of the diffusion sheet. The light source group includes a printed circuit board, and a plurality of operatively mounted on the printed circuit board via a bracket. A light-emitting diode electrically connected to a circuit track on the printed circuit board, and a plurality of optical lenses disposed on the printed circuit board and covering the corresponding light-emitting diode, and the diffuser sheet is opposite to the light source group The surface has several pits, and the backlight module further includes a plurality of quantum dot films attached to the surface of a corresponding one of the pits, so that the light emitted from the light emitting diode excites the quantum dot material in the quantum dot film. In this way, the narrow wave widths of red and green can be obtained on the spectrogram, so that the color gamut can be comparable to OLED LCD TVs.         A quantum dot backlight module includes a diffusion sheet and a light source group facing one surface of the diffusion sheet. The light source group includes a printed circuit board, and a plurality of operatively mounted on the printed circuit board via a bracket. A light-emitting diode electrically connected to a circuit track on the printed circuit board, and a plurality of optical lenses disposed on the printed circuit board and covering the corresponding light-emitting diode, and a surface of the diffusion sheet facing the light source group The opposite surface has a plurality of pits. The backlight module further includes a plurality of quantum dot films attached to the surface of the corresponding one of the pits, so that the light emitted from the light emitting diode excites the quantum in the quantum dot film. Dot materials can be used to obtain narrow red and green wave widths on the spectrogram and make it comparable to OLED LCD TVs in the color gamut.