WO2019223467A1

WO2019223467A1 - Liquid crystal television display module and liquid crystal television having same

Info

Publication number: WO2019223467A1
Application number: PCT/CN2019/083393
Authority: WO
Inventors: 历志辉; 黄坚顺
Original assignee: 深圳Tcl新技术有限公司
Priority date: 2018-05-23
Filing date: 2019-04-19
Publication date: 2019-11-28
Also published as: CN110531545A

Abstract

Disclosed are a liquid crystal television display module and a liquid crystal television having same. The liquid crystal television display module comprises an upper substrate, a lower substrate, a liquid crystal layer sandwiched between the upper substrate and the lower substrate, and an LED lamp board. Several concave holes are provided on one side of the lower substrate facing the liquid crystal layer, the concave holes are in one-to-one correspondence with pixels of the liquid crystal television, and the edge of each of the concave holes is an inclined reflective surface. In the present invention, several concave holes are provided on one side of the lower substrate facing the liquid crystal layer, the concave holes are in one-to-one correspondence with the pixels, and the edge of each of the concave holes is an inclined reflective surface, so that after the light emitted from the edge of the pixel passes through the inclined reflective surface of the concave hole, the optical path thereof can be changed, and the light becomes light emitted vertically, avoiding light leakage caused by the light, which is obliquely emitted from the edge of the pixel, passing through adjacent pixels, and improving the contrast

Description

Liquid crystal television display module and liquid crystal television having the same

Technical field

The invention relates to the technical field of televisions, in particular to a liquid crystal television display module and a liquid crystal television having the same.

Background technique

With the rapid development of the home appliance industry, although the functions of LCD TVs have been developed relatively well, currently the LCD TVs made with ordinary panels still have the problem that the black spot is not dark enough, so the picture contrast is low and the viewing reality is not good. Existing high-contrast TVs on the market all use LocalDimming technology to dynamically adjust the backlight to achieve a high contrast effect. However, the use of LocalDimming technology to dynamically adjust the backlight will increase the backlight material and drive costs, which will cause the overall cost to rise significantly.

FIG. 1 is a schematic structural diagram of a liquid crystal television display module made of a conventional panel in the prior art. The liquid crystal television display module made of an ordinary panel is provided with an upper polarizer 1, an upper glass substrate (may be referred to as an upper substrate) in order from top to bottom. 2. Liquid crystal molecules 3, lower glass substrate (may be referred to as lower substrate) 4, lower polarizer 5, LED light plate 6, rectangular frames a and b in the figure represent two adjacent pixel areas. When displaying an image, each The pixels may be in different states, some are on and some are off. If pixel a is on and pixel b is off, but due to the divergence of light, the LED light still emits light after passing through the lower glass substrate 4, so the pixel The edge of a still has the area where the oblique light passes through to pixel b. As shown by the arrow in Figure 1, if the liquid crystal at pixel b is not closed tightly, the light obliquely coming from the edge of pixel a may pass through pixel b. In this way, the pixel b, which should be turned off, is related to transmission, which causes the black field to be dark enough, the picture contrast is low, and the viewing reality is not good.

Therefore, the existing technology needs to be improved and developed.

Summary of the Invention

In view of the shortcomings of the prior art, an object of the present invention is to provide a liquid crystal television display module and a liquid crystal television having the same. Not enough black, low picture contrast, poor viewing realism.

To solve the above technical problems, the technical solutions adopted by the present invention are as follows:

A liquid crystal television display module includes an upper substrate, a lower substrate, a liquid crystal layer sandwiched between the upper substrate and the lower substrate, and an LED light board. The lower substrate faces a side of the liquid crystal layer. A plurality of recessed holes are provided, the recessed holes correspond to the pixels of the LCD TV one by one, and the edges of the recessed holes are inclined reflective surfaces.

As a further improved technical solution, the shape of the recessed hole portion is consistent with the shape of a liquid crystal television pixel.

As a further improved technical solution, the shape of the recessed hole portion is a circle, a rectangle, or a diamond.

As a further improved technical solution, an upper polarizer is disposed above the upper substrate, and a lower polarizer is disposed between the lower substrate and the LED lamp plate.

As a further improved technical solution, the LED lamp board includes a reflection board and LED lamp beads mounted on the reflection board.

As a further improved technical solution, the bottom of the recessed hole is a flat surface.

As a further improved technical solution, an inclined angle of the inclined reflecting surface is 15 ° to 60 °.

As a further improved technical solution, the concave hole is formed by connecting a plurality of inclined reflecting surfaces.

As a further improved technical solution, an inclined angle of the inclined reflecting surface is 30 ° to 45 °.

As a further improved technical solution, the inclination angle of the inclined reflecting surface upwards at the bottom of the recessed hole is sequentially increased by 1 ° -15 °.

As a further improved technical solution, a light-shielding region corresponding to a pixel is provided on the lower substrate.

As a further improved technical solution, a transparent material layer is provided between the liquid crystal layer and the lower substrate to fill the recessed holes so that the liquid crystals are uniformly arranged.

As a further improved technical solution, the transparent material layer is a resin material or a silicon nitride material.

As a further improved technical solution, the upper substrate and the lower substrate are glass plates.

The invention also discloses a liquid crystal television, which comprises the liquid crystal television display module as described above.

The present invention adopts the above technical solution and has at least the following beneficial effects: a plurality of recessed holes are provided on the side of the lower substrate facing the liquid crystal layer, and the recessed holes correspond to the pixels one by one, and the edges of the recessed holes are inclined reflective surfaces, so that the pixel edges are obliquely projected After the light passes through the inclined reflecting surface of the recessed hole, the light path can be changed into vertical light, which prevents light emitted from the oblique edge of the pixel from passing through the adjacent pixels to cause light leakage and improves the contrast; it is set between the liquid crystal layer and the lower substrate There is a layer of transparent material used to fill the recessed holes, so that the liquid crystals can be arranged uniformly; the shape of the openings of the recessed holes is consistent with the shape of the LCD TV pixels, so that all the light obliquely emitted from the edge of the pixel can be emitted vertically without passing through To the pixel area next to it; the shape of the recessed hole can be a flat-bottomed beveled edge, or it can be composed entirely of an inclined reflective surface. When the shape of the recessed hole can be a flat-bottomed beveled edge, the inclined angle of the beveled edge is 15 ° to 60 °, When the recessed hole is completely composed of an inclined reflecting surface, the inclination angle of the inclined side at the bottom of the recessed hole is 30 ° to 45 °, and the inclined reflecting surface at the bottom increases in order. 1 ° ~ 15 °, as long as all the reflective surfaces are inclined rather than vertical or inclined to, such an angle is substantially completely oblique edge pixel outgoing light emitted whole becomes vertical.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present application, and form a part of the present application. The embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

FIG. 1 is a schematic structural diagram of a liquid crystal television display module made by a conventional panel in the prior art.

FIG. 2 is a schematic structural diagram of an embodiment of a liquid crystal television display module according to the present invention.

FIG. 3 is a schematic structural diagram of another embodiment of a liquid crystal television display module according to the present invention.

FIG. 4 is a schematic diagram of the front structure of the lower substrate.

Detailed ways

The embodiments of the present application will be described in detail below with reference to the drawings and embodiments, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve technical effects.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "up", "down", "inner" and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the convenience of describing the present invention. And simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Please refer to FIG. 1. In the present invention, in order to solve the problem that the light obliquely transmitted from the edge of the pixel a penetrates to the pixel b in the prior art, the pixel b which should be turned off is related to the transmission, which causes the black field to be not black enough and the picture contrast to be low. Then, the light obliquely emitted from the edge of the pixel a cannot pass through the area of the pixel b. The present invention adopts a method of changing the optical path of the light obliquely emitted from the edge of the pixel a so as to be emitted perpendicularly from the area of the pixel a.

As shown in FIG. 2, the LCD television display module of the present invention includes an upper polarizer 10, an upper substrate 20, a liquid crystal layer 30, a lower substrate 40, a lower polarizer 50, and an LED lamp plate 60, and a liquid crystal layer, which are arranged in order from top to bottom. 30 is sandwiched between the upper substrate 20 and the lower substrate 40, and a plurality of recessed holes 41 are provided on a side of the lower substrate 40 facing the liquid crystal layer 30, and the recessed holes 41 correspond to the pixels of the LCD TV, that is, each pixel Corresponding to a recessed hole 41, the pixels of the LCD TV are designed when the TV is designed, and the position and size of the pixels are designed in advance. The edge of the recessed hole 41 is an inclined reflective surface. In this way, when light obliquely emitted from the pixel edge passes through the inclined reflective surface, it is reflected by the inclined reflective surface, so that the obliquely emitted light becomes emitted in a direction perpendicular to the upper substrate 20, such as As shown by the arrows in FIG. 2, the obliquely emitted light will not pass through to the adjacent pixel area, which improves the contrast. Since the size of the pixel is extremely small and is in the order of micrometers, the size of the recessed hole 41 is correspondingly in the order of micrometers, and is generally in the range of several ten to several hundred micrometers.

The upper substrate 20 and the lower substrate 40 are generally glass plates, which can improve light transmittance.

In order to change all the oblique outgoing light at the edge of the pixel into vertical outgoing light, the shape of the mouth of the recessed hole 41 can be designed to be consistent with the shape of the LCD TV pixel. Generally, the pixel shape of each model of the LCD TV may be The design is different. There are rectangles, circles, rhombuses, etc. The shape of the mouth portion of the recessed hole 41 is correspondingly rectangular, round, and rhombus. In this way, the mouth of the recessed hole 41 is designed to be consistent with the shape of the pixel. The light at the edge of the pixel can be reflected by the inclined reflecting surface at the edge of the concave hole 41, and the effect that no light penetrates to the adjacent pixel can be achieved. FIG. 4 is a schematic diagram of the front structure of the lower substrate. The recessed holes 41 are distributed on the lower substrate 40 in a matrix corresponding to the pixel structure.

FIG. 2 and FIG. 3 are two different embodiments of the LCD television display module of the present invention. As shown in FIG. 2, the recessed hole 41 may have a structure with a flat bottom and a sloped reflective surface, or the structure shown in FIG. 3 may be adopted. In the structure shown, the recessed hole 41 is connected by a plurality of inclined reflecting surfaces. Both structures can achieve the effect of turning obliquely emitted light from the edge of a pixel into vertical light.

When the bottom of the recessed hole 41 is a flat surface and the edge is an inclined reflective surface, the inclination angle of the inclined reflective surface at the edge of the recessed hole 41 is 15 ° to 60 °. When the recessed hole 41 is formed by connecting a plurality of inclined reflective surfaces The inclination angle of the inclined reflection surface at the bottom of the recessed hole 41 is 30 ° ~ 45 °, and the inclined reflection surface at the bottom is increased by 1 ° ~ 15 ° in order, as long as all inclined reflection surfaces are ensured to be inclined instead of Just vertical. The two different structures of the above-mentioned concave holes 41 can achieve the effect of turning obliquely emitted light from the edge of a pixel to a vertical direction only when the above-mentioned angle requirements are met.

In addition, it can be understood that the recessed hole 41 may have a flat bottom and an edge formed of a plurality of inclined reflective surfaces.

Please refer to FIG. 2, since the lower substrate 40 is provided with recessed holes 41, the surface of the lower substrate 40 will be uneven, and a transparent material layer 70 may be provided between the liquid crystal layer 30 and the lower substrate 40. The transparent material layer 70 will be concave. The holes 41 are filled to make the liquid crystals of the liquid crystal layer 30 evenly arranged, and the display effect is improved.

The transparent material layer 70 is a resin-based material or a silicon nitride-based material. The light transmittance of the resin-based material or the silicon nitride-based material is very good, and does not affect the texture of the television screen.

The LED lamp board 60 includes a reflecting plate 61 and LED lamp beads 62, and the LED lamp beads 62 are mounted on the reflecting plate 61. Specifically, a plurality of LED light beads can be assembled into an LED light bar, and the assembled LED light bar can be fixed on the reflecting plate 61, or one piece of LED light beads 62 can be directly fixed on the LED light plate.

Please continue to refer to FIG. 2, each pixel of the lower substrate 40 is provided with a light-shielding region 42. The light-shielding region 42 is formed by chemical or physical processing on the lower substrate 40 so that each pixel edge forms a circle of opaque area. The light-shielding area 42 can distinguish each pixel to prevent light leakage and color mixing.

The present invention also provides a liquid crystal television including the liquid crystal television display module as described above. When the LCD TV works, the light emitted by the LED light board 60 is reflected after passing through the inclined reflecting surface of the edge of the recessed hole 41 corresponding to the pixel, so that the oblique light emitted from the edge of the pixel becomes vertical light, avoiding The obliquely emitted light passes through the adjacent pixels and causes light leakage, which improves the contrast, as described above.

In the present invention, a plurality of concave holes are provided on a side of the lower substrate facing the liquid crystal layer. The concave holes correspond to the pixels one by one, and the edges of the concave holes are inclined reflective surfaces. After that, the light path can be changed to become the light emitted vertically, which can prevent the light emitted obliquely from the edge of the pixel from passing through the adjacent pixels to cause light leakage and improve the contrast; a transparent material layer is provided between the liquid crystal layer and the lower substrate to fill the recessed holes. In this way, the liquid crystal can be arranged uniformly; the shape of the opening of the recessed hole is consistent with the shape of the LCD TV pixel, so that all the light obliquely emitted from the edge of the pixel can be emitted vertically without passing through the adjacent pixel area; the recessed hole can be flat-bottomed The side can also be composed entirely of an inclined reflecting surface. When the shape of the concave hole is a flat-bottom beveled edge, the inclined angle of the hypotenuse is 15 ° to 60 °. When the concave hole is completely composed of the inclined reflective surface, the concave hole The inclined angle of the bottommost hypotenuse is 30 ° ~ 45 °, and the upwardly inclined reflective surface at the bottom is increased by 1 ° ～ 15 ° in turn. As long as all inclined reflective surfaces are still inclined, To the vertical, so the angle can be substantially completely oblique edge pixel emitting light perpendicularly emitted into the whole.

It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or changes can be made according to the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

A liquid crystal television display module, comprising an upper substrate, a lower substrate, a liquid crystal layer sandwiched between the upper substrate and the lower substrate, and an LED lamp board, and the lower substrate faces the liquid crystal. A plurality of recessed holes are provided on one side of the layer, the recessed holes correspond to the pixels of the liquid crystal television one by one, and the edges of the recessed holes are inclined reflective surfaces.
The liquid crystal television display module according to claim 1, wherein a shape of the recessed hole portion is consistent with a shape of a liquid crystal television pixel.
The liquid crystal television display module according to claim 2, wherein the shape of the recessed hole portion is circular, rectangular, or rhombic.
The liquid crystal television display module according to claim 1, wherein an upper polarizer is disposed above the upper substrate, and a lower polarizer is disposed between the lower substrate and the LED lamp plate.
The liquid crystal television display module according to claim 1, wherein the LED lamp board comprises a reflecting plate and LED lamp beads mounted on the reflecting plate.
The liquid crystal television display module according to claim 1, wherein a bottom of the recessed hole is a flat surface.
The liquid crystal television display module according to claim 6, wherein an inclined angle of the inclined reflective surface is 15 ° to 60 °.
The liquid crystal television display module according to claim 1, wherein the recessed hole is formed by connecting a plurality of inclined reflective surfaces.
The liquid crystal television display module according to claim 8, wherein the inclination angle of the inclined reflecting surface at the bottom of the recessed hole is 30 ° to 45 °.
The liquid crystal television display module according to claim 9, wherein the inclination angle of the inclined reflective surface upwards at the bottom of the recessed hole increases by 1 ° to 15 ° in sequence.
The liquid crystal television display module according to claim 1, wherein a light-shielding area corresponding to a pixel is provided on the lower substrate.
The liquid crystal television display module according to claim 1, wherein a transparent material layer is provided between the liquid crystal layer and the lower substrate to fill the recessed holes to uniformly arrange the liquid crystals.
The liquid crystal television display module according to claim 12, wherein the transparent material layer is a resin material or a silicon nitride material.
The liquid crystal television display module according to claim 1, wherein the upper substrate and the lower substrate are glass plates.
A liquid crystal television, wherein the liquid crystal television comprises the liquid crystal television display module according to any one of claims 1-14.