CN215416197U

CN215416197U - Light filling structure of reflective TFT sun screen

Info

Publication number: CN215416197U
Application number: CN202121244650.2U
Authority: CN
Inventors: 龙定华
Original assignee: Xinhuikai Technology Shenzhen Co ltd
Current assignee: Xinhuikai Technology Shenzhen Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2022-01-04
Anticipated expiration: 2031-06-04

Abstract

The utility model relates to a light supplementing structure of a reflective TFT (thin film transistor) sunlight screen, which comprises a light guide plate, wherein the side wall of the light guide plate is connected with a quantum dot LED (light-emitting diode) light source, one side of the light guide plate is provided with a dot, one side of the light guide plate, which is far away from the dot, is connected with the reflective TFT sunlight screen through full lamination of an optical laminating layer, and light emitted by the quantum dot LED light source is irradiated on the reflective TFT sunlight screen after being reflected by the dot for supplementing light to the reflective TFT sunlight screen. The utility model can fill light into the sunlight screen under the condition of bad weather or dark light at night, so that the TFT sunlight screen can clearly display in any environment, and the display color saturation of the reflective TFT sunlight screen is improved.

Description

Light filling structure of reflective TFT sun screen

Technical Field

The utility model relates to a light supplementing structure of a display, in particular to a light supplementing structure of a reflective TFT (thin film transistor) sun screen.

Background

The biggest difference between a reflective TFT sun screen (SLCD for short) and the existing TFT liquid crystal display screen is that a backlight source is not used, the display is realized by reflecting ambient light, full-high-definition videos, pictures and characters can be clearly displayed under strong sunlight irradiation, the power consumption is only about 1/20 of a common high-brightness outdoor liquid crystal display screen, and the reflective TFT sun screen is a super energy-saving and eye-protecting green and environment-friendly product.

The reflective TFT sun screen shows clearly without problems in the daytime or when the light is good, and it shows dimly if it catches up with bad weather or when the light is dark at night. The front light of the existing reflective TFT sun screen adopts a white light synthesized by a common white LED or RGB tricolor LED as a luminous source, and irradiates the surface of an LCD after being reflected by the mesh points of a light guide plate, thereby achieving the purpose of supplementing the ambient light. However, the common white LED light source has the disadvantages of a wide spectrum, a large amount of stray light, a low color rendering index, a high color temperature and drift, which results in a low color purity and a low color gamut of the display; the white light synthesized by RGB three-primary-color LEDs has the defects of complex driving circuit, high cost, uneven color, poor color temperature stability caused by different light attenuation of the three primary colors and easy color drift.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a light supplementing structure of a reflective TFT sunlight screen, which is used for supplementing light to the sunlight screen under the condition of bad weather or dark light at night, so that the TFT sunlight screen can clearly display in any environment, and the display color saturation of the reflective TFT sunlight screen is improved.

The technical scheme for solving the technical problems is as follows: a light supplementing structure of a reflective TFT (thin film transistor) sun screen comprises a light guide plate, wherein the side wall of the light guide plate is connected with a quantum dot LED (light-emitting diode) light source, one side of the light guide plate is provided with a mesh point, and one side of the light guide plate, which is far away from the mesh point, is fully attached and connected with the reflective TFT sun screen through an optical attaching layer;

and light emitted by the quantum dot LED light source irradiates the reflective TFT sunlight screen after being reflected by the dots, and is used for supplementing light to the reflective TFT sunlight screen.

The utility model has the beneficial effects that: by adopting a front light reflection principle, light emitted by the quantum dot LED light source enters the light guide plate, and the mesh points on one side of the light guide plate emit the light emitted by the quantum dot LED light source to the reflective TFT sunlight screen, so that a light supplementing effect is achieved, and the display color saturation of the reflective TFT sunlight screen is improved.

On the basis of the technical scheme, the utility model can be further improved as follows.

Furthermore, the mesh points are convex hemispheres or concave hemispheres.

The beneficial effect of adopting above-mentioned further scheme is that the dot is that the light of quantum dot LED light source is reflected in convex hemisphere or concave hemisphere, reaches to reflect again after carrying out the spotlight to the light source simultaneously, improves reflection efficiency, strengthens the light filling of emission formula TFT sun screen.

Further, the light emitted by the quantum dot LED light source is blue light.

The quantum dot light-emitting LED emits blue light, part of the blue light is converted into green light and red light by the quantum dots, the unconverted blue light and the green light and the red light emitted by the quantum dots form white light together, and the white light is reflected by the mesh points of the light guide plate from the side surface and then irradiates the LCD surface of the reflective TFT sun screen, so that the brightness of the reflective TFT sun screen is improved.

Furthermore, the quantum dot LED light source is welded on a printed circuit board or a flexible circuit board to form a light bar, and the light bar is fixedly connected to the side wall of the light guide plate.

The quantum dot LED light source is welded on the circuit board, so that the installation is convenient, and the brightness of the quantum dot LED light source is convenient to control.

Furthermore, the light guide plate is transparent, the thickness of the light guide plate is 0.4 mm-1.0 mm, and a glass cover plate is attached to one side of the mesh points through double-sided bubble glue or optical glue.

Adopt above-mentioned further scheme's beneficial effect to be that the light guide plate is transparent, improves the light transmissivity of light, and the glass apron is through reinforceing and sealing etc. and after handling, mainly used waterproof anticollision.

Further, the glass cover plate is coated with an antireflection film for reducing air reflection.

The beneficial effect of adopting above-mentioned further scheme is that antireflection film is all coated on glass apron upper and lower two sides, can the effectual air bed reflection that reduces, increases the luminousness, increases the utilization ratio of light.

Further, the thickness of the light guide plate is not less than that of the quantum dot LED light source, and the light guide plate is used for reducing light source leakage.

The quantum dot LED light source is positioned on the side wall of the light guide plate, so that light source leakage is reduced, and interference of the quantum dot LED light source is reduced.

Furthermore, the gap between the glass cover plate and the light guide plate is 0.3 mm-1.2 mm.

The beneficial effect who adopts above-mentioned further scheme is that the clearance between glass apron and the light guide plate is used for the glass apron buffering, when preventing that collision or slight deformation from appearing in the glass apron, causes the influence to the light guide plate for the reflection is uneven, and appears showing black spot or showing rainbow line etc..

Further, the thickness of the optical laminating layer is 0.2 mm-1.2 mm.

Furthermore, the thickness of the glass cover plate is 0.7 mm-5 mm.

The beneficial effect of adopting the further scheme is that the glass cover plate is processed by AR coating, thus reducing the reflection of the air layer.

Drawings

FIG. 1 is a schematic diagram of a light supplement structure of a reflective TFT sun screen according to an embodiment of the present invention;

FIG. 2 is a diagram of a quantum dot LED light source according to an embodiment of the present invention;

FIG. 3 is a schematic view of a TFT solar panel according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating the transmittance of a conventional white color filter according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a spectrum of quantum dot white light after being transmitted by a color filter according to an embodiment of the utility model.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a mesh point; 2. a glass cover plate; 3. double-sided foam surface glue; 4. a quantum dot LED light source; 5. a light guide plate; 6. and an optical laminating layer.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, a light supplementing structure of a reflective TFT sun screen includes a light guide plate 5, the light guide plate 5 is transparent, the thickness of the light guide plate 5 is 0.4mm to 1.0mm, the thickness of the light guide plate 5 is determined according to the size of the display screen, and the transparent light guide plate 5 is used to improve light permeability. The lateral wall of the light guide plate 5 is connected with a quantum dot LED light source 4, wherein, the light emitted by the quantum dot LED light source 4 is reflected by the lattice point 1 and then irradiates the reflective TFT sunlight screen 7 for supplementing light to the reflective TFT sunlight screen 7, the thickness of the light guide plate 5 is not less than that of the quantum dot LED light source 4, the leakage of the light source is reduced, and meanwhile, the quantum dot LED light source is prevented from being emitted from the upper side or the lower side of the light guide plate to interfere with the supplementing light for the reflective TFT sunlight screen, and the display effect of the reflective TFT sunlight screen is influenced.

As shown in fig. 2 and fig. 3, the reflective TFT solar panel belongs to a reflective display mode, and in order to increase the reflectivity of the panel and thus obtain a better display effect under ambient light, the TFT LCD needs to adopt a color filter (color filter) with light color and high transmittance, which results in that the display color saturation of the reflective TFT solar panel is only 10% -15% NTSC.

In this embodiment, the light emitted by the quantum dot LED light source 4 is blue light, the energy of the blue light is large, a part of the blue light is converted into Green light (Green QD) and Red light (Red QD) by the quantum dots, the unconverted blue light and the Green light and the Red light emitted by the quantum dots form white light together, and the white light is reflected by the dot 1 of the light guide plate 5 from the side surface and then irradiates the LCD surface of the reflective TFT solar screen, thereby improving the brightness of the emissive TFT solar screen. The RGB light emitted from the quantum dot LED light source 4 is real colored light, has very high purity, has a color saturation of more than 100% NTSC, has a very narrow spectrum at the half-peak width of the three colors red, blue and green, and has a very narrow half-peak width of R, G, B three colors reflected by the filter of the reflective TFT. The common white LED light source has the disadvantages of a wide spectrum, a large amount of stray light, a low color rendering index, a high color temperature and drift, which results in a low color purity and a low color gamut of the display.

As shown in fig. 4, the visible light spectrum is used as the abscissa and the pass rate is used as the ordinate in fig. 4, and after the ordinary white light is filtered by the color filter, the transmittances of the red (R), green (G) and blue (B) light are shown, and it can be seen from the figure that the half-peak widths of the red (R), green (G) and blue (B) light are not narrow, the stray light is much, the color is impure, and the color reducibility is not good enough.

As shown in fig. 5, the visible light spectrum is taken as the abscissa, and then the energy density of the quantum light along with the visible light wavelength, the transmittance of the color filter (color filter) along with the visible light wavelength, and the energy density of the quantum light along with the wavelength after passing through the color filter (color filter) are taken as the ordinate, respectively, the red light (R), the green light (G), and the blue light (B) emitted from the color filter (color filter) of the white light transparent reflective TFT solar screen by the quantum dot LED light source 4 have a narrow half-peak width, a narrow frequency spectrum, less stray light, and a high color rendering index, and after the white light is formed by the three primary colors, the red light (R), the green light (G), and the blue light (B) are irradiated onto the reflective TFT solar screen through the mesh point 1, so that the brightness is improved, and the saturation is also improved, and the TFT solar screen can clearly display under any condition.

As shown in fig. 1, the quantum dot LED light source 4 is welded on the printed circuit board or the flexible circuit board to form a light bar, and the light bar is fixedly connected to the side wall of the light guide plate 5. The quantum dot LED light source 4 forms a light bar, is convenient to install and maintain quickly, and is beneficial to the centralized control of the brightness of the quantum dot LED light source. One side of the light guide plate 5 is provided with a mesh point 1, the mesh point 1 is in a convex hemisphere or a concave hemisphere, and the mesh point 1 in the convex hemisphere or the concave hemisphere is beneficial to condensing light emitted by the quantum dot LED light source and reflecting the light to the LCD surface of the reflective TFT sunlight screen 7.

One side of the light guide plate 5, far away from the screen points 1, is connected with a reflective TFT (thin film transistor) sun screen 7 through full lamination of an optical laminating layer 6, and the thickness of the optical laminating layer 6 is 0.2 mm-1.2 mm and is mainly determined according to the size of a product. Light guide plate 5 passes through optical laminating layer 6 with reflective TFT sunshine screen and laminates completely, removes middle air bed structure from, can effectual suppression light reflection, reduce light utilization ratio.

The light guide plate 5 is provided with a glass cover plate 2, one side of the light guide plate, which is provided with the screen points 1, is attached with the glass cover plate 2 through double-sided bubble glue 3 or optical glue, the thickness of the glass cover plate 2 is 0.7 mm-5 mm, the thickness of the glass cover plate 2 is mainly determined according to the size of a display screen, and the larger the display area is, the thicker the thickness of the corresponding glass cover plate 2 is. The glass cover plate 2 is waterproof and anti-collision after being subjected to strengthening treatment and side sealing treatment. The gap between the glass cover plate 2 and the light guide plate 5 is 0.3 mm-1.2 mm, in this embodiment, the gap between the glass cover plate 2 and the light guide plate 5 is 0.5mm, and in other embodiments, the gaps between the glass cover plate 2 and the light guide plate 5 are 0.3mm, 0.4mm, 0.6mm, 0.7mm, and 1.1mm, which can also achieve the effect of the present invention. The clearance is used for 2 cushions of glass apron, prevents that glass apron 2 from appearing colliding or when slightly warping, causes the influence to light guide plate 5 for the reflection is uneven. The glass cover plate 2 is coated with a reflecting film for reducing empty reflection, and in one embodiment, the upper surface and the lower surface of the glass cover plate 2 are subjected to AR coating treatment, so that the reflection of an air layer is reduced, the light transmittance is increased, the light utilization rate is increased, the light transmittance of a quantum dot LED light source is reduced, and the illumination intensity of the quantum dot LED light source is further reduced.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a light filling structure of reflective TFT sun screen which characterized in that: the LED backlight module comprises a light guide plate (5), wherein a quantum dot LED light source (4) is connected to the side wall of the light guide plate (5), a mesh point (1) is arranged on one side of the light guide plate (5), and a reflective TFT sun screen (7) is fully attached and connected to one side, far away from the mesh point (1), of the light guide plate (5) through an optical attaching layer (6);

light emitted by the quantum dot LED light source (4) is reflected by the screen dots (1) and then irradiates the reflective TFT sun screen (7) for supplementing light to the reflective TFT sun screen (7).

2. A light supplementing structure of a reflective TFT solar panel as claimed in claim 1, wherein: the net points (1) are in a convex hemisphere shape or a concave hemisphere shape.

3. A light supplementing structure for a reflective TFT solar panel as claimed in claim 1, wherein: the light emitted by the quantum dot LED light source (4) is blue light.

4. A light supplementing structure for a reflective TFT solar panel as claimed in claim 1, wherein: the quantum dot LED light source (4) is welded on a printed circuit board or a flexible circuit board to form a light bar, and the light bar is fixedly connected to the side wall of the light guide plate (5).

5. A light filling structure of a reflective TFT sun screen according to any one of claims 1 to 4, wherein: the light guide plate (5) is transparent, the thickness of light guide plate (5) is 0.4 mm-1.0 mm, just install on light guide plate (5) site (1) one side has glass apron (2) through two-sided bubble face glue (3) or optical cement laminating.

6. A light filling structure of a reflective TFT sun screen according to claim 5, characterized in that: the glass cover plate (2) is coated with an antireflection film for reducing air reflection.

7. A light filling structure of a reflective TFT sun screen according to claim 5, characterized in that: the thickness of the light guide plate (5) is not less than that of the quantum dot LED light source (4) and is used for reducing light source leakage.

8. A light filling structure of a reflective TFT sun screen according to claim 5, characterized in that: the gap between the glass cover plate (2) and the light guide plate (5) is 0.3 mm-1.2 mm.

9. A light filling structure of a reflective TFT sun screen according to claim 5, characterized in that: the thickness of the optical laminating layer (6) is 0.2 mm-1.2 mm.

10. A light filling structure of a reflective TFT sun screen according to claim 5, characterized in that: the thickness of the glass cover plate (2) is 0.7 mm-5 mm.