CN104849898A - Curved surface display capable of reducing light leakage - Google Patents

Abstract

The invention provides a curved surface display capable of reducing light leakage, comprising: the liquid crystal panel comprises a visible area and a peripheral area, wherein the peripheral area comprises a black matrix layer; the rubber frame comprises a first step part and a second step part; a protective glass, one end of which is placed on the first step part and the lower surface of which is attached to the liquid crystal panel; the first side edge of the front frame is attached to the rubber frame, and the second side edge of the front frame is attached to one part of the upper surface of the protective glass; and a diffusion plate disposed on the second step portion and having an upper surface for emitting light to the liquid crystal panel. The second step portion has a retaining wall, the diffusion plate has a groove, and the retaining wall inserted into the groove can be used for blocking light from penetrating to the edge of the panel. Compared with the prior art, the retaining wall is arranged at the step part of the rubber frame, the groove is formed in the diffusion plate, and after the retaining wall is inserted into the groove, light can be prevented from permeating to the edge of the liquid crystal panel by the retaining wall, so that the light leakage problem of the conventional curved-surface display can be solved, and the diffusion plate can be reinforced and fixed.

Description

A curved display that reduces light leakage

technical field

The invention relates to a curved display, in particular to a curved display which can be used to reduce light leakage.

Background technique

In the existing technology, all kinds of consumer electronic products have been developed from functional to artistic development based on design, novelty and fashion. Consumers not only pay attention to functionality, but design and product form have become the main factors affecting consumer behavior. Generally speaking, most liquid crystal display devices use unthinned glass substrates as the base material of the color filter substrate and the thin film transistor substrate, so that the weight of the device is not effectively reduced. In order to reduce the weight of the glass substrate and make the device lighter and thinner, an existing improvement is to propose a thinned glass substrate. However, the glass substrate is a hard substrate, even if the thinned glass substrate can reduce the overall weight, but still can't make the device bendy. Another existing improvement scheme is to propose a curved display (curved display).

A curved display is a display with a curved display surface. When the user watches the curved display, the distance between the human eye and each position of the curved display is approximately equal, and the user can approach the picture displayed in the central area or the left and right edge areas. It is viewed at a right-angle viewing angle, so compared with a flat-panel display, a curved display will not have problems such as brightness deviation and color deviation when viewed at a large viewing angle. In addition, curved displays have a stereoscopic-like visual effect. Therefore, the curved display has become a display product that attracts high attention. Take the curved display including the direct-lit backlight module as an example, which often uses a diffuser plate as the secondary light source. Without special treatment, the entire surface of the diffuser plate will emit light, and the light will pass through the upper surface of the panel. Transparent protective glass. Since the protective glass has a certain thickness, the sides of the front frame cannot effectively block the light leakage in the area of the transparent protective glass.

In view of this, how to design a new curved surface display to reduce the adverse situation of light leakage, so as to overcome the above-mentioned defects and deficiencies in the prior art, is a problem to be solved urgently by relevant technical personnel in the industry.

Contents of the invention

Aiming at the light leakage existing in the curved surface display in the prior art, the present invention provides a novel curved surface display capable of reducing light leakage.

According to one aspect of the present invention, a curved display capable of reducing light leakage is provided, comprising:

A liquid crystal panel, including a visible area and a peripheral area located on both sides of the visible area, the peripheral area includes a black matrix layer;

A plastic frame, including a first step and a second step, wherein the first step is located above the second step;

A protective glass, one end of which is placed on the first stepped portion, and the lower surface of the protective glass is bonded to the liquid crystal panel;

A front frame, including a first side and a second side, the first side of the front frame is attached to the plastic frame, and the second side of the front frame is attached to the protective glass part of the upper surface of the

A diffusion plate is arranged on the second step, and the upper surface of the diffusion plate emits light to the liquid crystal panel;

Wherein, the second stepped portion has a retaining wall, and the diffuser plate has a groove opening downward, the groove matches the position of the retaining wall, and the The blocking wall is used to block part of the light emitted by the diffusion plate from penetrating to the outside of the edge of the black matrix layer in the peripheral area.

In one of the embodiments, the depth of the groove and the thickness of the diffusion plate satisfy the following relationship:

1/4*H≤D≤3/4*H;

Wherein D represents the depth of the groove, and H represents the thickness of the diffusion plate.

In one embodiment, the height of the retaining wall is 1 mm or 2 mm.

In one of the embodiments, the section of the retaining wall is rectangular, trapezoidal or wedge-shaped.

In one embodiment, the surface of the retaining wall includes an adhesive layer for bonding the inner wall of the groove so as to fix the diffuser plate to the second step.

In one of the embodiments, the curved display further includes a direct-lit backlight module disposed directly under the diffuser plate.

In one embodiment, the backlight module includes a red LED light bar, a green LED light bar and a blue LED light bar.

In one embodiment, the backlight module further includes a multilayer optical film laminated on the upper surface of the diffusion plate.

In one embodiment, the liquid crystal panel further includes a control circuit attached to the lower surface of the protective glass and located between the first stepped portion and the black matrix layer.

In one embodiment, the control circuit is a flexible printed circuit board (Flexible Printed Circuit, FPC).

With the curved surface display that can reduce light leakage of the present invention, its plastic frame includes a first step and a second step, one end of the protective glass is placed on the first step and the lower surface is bonded to the liquid crystal panel, and the diffusion plate is arranged on the second step. The upper surface of the stepped portion emits light to the liquid crystal panel, the second stepped portion has a retaining wall, and the diffusion plate has a groove with an opening downward. The position of the groove matches the retaining wall, and the retaining wall inserted into the groove Part of the light emitted by the diffusion plate is prevented from penetrating to the outside of the edge of the black matrix layer. Compared with the prior art, the present invention sets a row of raised retaining walls on the step portion of the plastic frame, and sets a groove with the opening facing downward on the diffuser plate. When the retaining walls are inserted into the grooves, the retaining walls can be used to block light Penetrating to the edge of the peripheral area of the liquid crystal panel, not only can solve the light leakage problem in the existing curved display, but also can strengthen the fixed diffusion plate.

Description of drawings

Readers will have a clearer understanding of various aspects of the present invention after reading the detailed description of the present invention with reference to the accompanying drawings. in,

FIG. 1 shows a schematic structural view of a curved display in the prior art;

FIG. 2 shows a schematic structural view of a curved display according to an embodiment of the present invention; and

FIG. 3 is a schematic diagram showing the relationship between the height of the retaining wall on the plastic frame and the thickness of the diffuser plate in the curved display in FIG. 2 .

Detailed ways

In order to make the technical content disclosed in this application more detailed and complete, reference may be made to the drawings and the following various specific embodiments of the present invention, and the same symbols in the drawings represent the same or similar components. However, those skilled in the art should understand that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for schematic illustration and are not drawn according to their original scale.

The specific implementation manners of various aspects of the present invention will be further described in detail below with reference to the accompanying drawings.

FIG. 1 shows a schematic structural diagram of a curved display in the prior art. 1, the existing curved display includes a liquid crystal panel (panel) 10, a plastic frame (frame) 20, a protective glass (cover lens) 30, a front bezel (front bezel) 40 and a diffusion plate 50.

Specifically, the liquid crystal panel 10 includes an active area (AA) and peripheral areas located on both sides of the visible area. The peripheral area includes a black matrix layer (black matrix, BM) 102 and a control circuit 104 . The control circuit 104 is attached to the lower surface of the protective glass 30 and is located on the side of the black matrix layer 102 close to the edge of the panel. For example, the control circuit can be a flexible printed circuit board (Flexible Printed Circuit, FPC).

The plastic frame 20 includes a first step (first step) 202 and a second step (second step) 204 . Wherein, the first stepped portion 202 is located above the second stepped portion 204 . One end of the protective glass 30 is placed on the first step portion 202 of the plastic frame 20 , and the lower surface of the protective glass 30 is bonded to the liquid crystal panel 10 . The front frame 40 includes a first side (that is, the side along the vertical direction) and a second side (that is, the side along the horizontal direction), and the first side of the front frame 40 is attached to the glue frame 20 and the second side of the front frame 40 is attached to a part of the upper surface of the protective glass 30 . The diffusion plate 50 is disposed on the second step portion 204 of the plastic frame 20 , and the upper surface of the diffusion plate 50 emits light to the liquid crystal panel 10 . In addition, in order to enhance the optical properties of the light emitted by the diffuser plate 50 , a multilayer optical film 502 may be disposed thereon, and these optical films 502 are stacked on the upper surface of the diffuser plate 50 .

As mentioned in the Background Art section, in the curved display shown in FIG. ). The diffuser plate 50 is used as a secondary light source, and its entire surface emits light. Since the protective glass 30 has a certain thickness, part of the light penetrating to the left side of the black matrix layer 102 will pass through the transparent protective glass 30 on the top of the panel 10, so that the second side of the front frame 40 cannot effectively block the transparent protective glass. Light leakage in the area.

In order to overcome the above defects and deficiencies in the prior art, the present invention discloses a curved display that can reduce light leakage. FIG. 2 is a schematic structural diagram of a curved display according to an embodiment of the present invention, and FIG. 3 is a schematic diagram of the relationship between the height of the wall on the plastic frame and the thickness of the diffuser in the curved display of FIG. 2 .

Comparing Fig. 2 with Fig. 1, the main improvement of the present invention is that the second step portion 204 of the plastic frame 20 has a retaining wall 206, and the diffuser plate 50 has a groove opening downward (not shown in the figure). shown), the groove matches the position of the retaining wall 206. In this way, the present invention can prevent part of the light emitted by the diffusion plate 50 from penetrating to the outside of the edge of the black matrix layer 102 in the peripheral area by inserting the blocking wall 206 into the groove. As can be seen from FIG. 2, after the retaining wall 206 is set, the area below the flexible printed circuit board 104 (as shown in the ellipse in FIG. light leaks.

In a specific embodiment, the depth of the groove and the thickness of the diffusion plate 50 satisfy the following relationship:

1/4*H≤D≤3/4*H;

Wherein, D represents the depth of the groove, and H represents the thickness of the diffusion plate, as shown in FIG. 3 . It should be noted that the depth of the groove is not less than 1/4 times the thickness of the diffuser plate, which can ensure the strength of the diffuser plate fixed to the plastic frame and the shading effect; the depth of the groove is not greater than 3/4 times the thickness of the diffuser plate, which can Avoid breakage of the diffuser plate. For example, the height of the retaining wall 206 is 1 millimeter or 2 millimeters. Experimental data show that when the retaining wall is not provided, there will be large-angle light leakage; The probability of is greatly reduced, and the height of the wall has little effect on the blocking effect of light.

In a specific embodiment, the section of the retaining wall is rectangular, trapezoidal or wedge-shaped. In addition, the surface of the retaining wall may further include an adhesive layer for bonding the inner wall of the groove so as to fix the diffuser plate on the second step.

With the curved surface display that can reduce light leakage of the present invention, its plastic frame includes a first step and a second step, one end of the protective glass is placed on the first step and the lower surface is bonded to the liquid crystal panel, and the diffusion plate is arranged on the second step. The upper surface of the stepped portion emits light to the liquid crystal panel, the second stepped portion has a retaining wall, and the diffusion plate has a groove with an opening downward. The position of the groove matches the retaining wall, and the retaining wall inserted into the groove Part of the light emitted by the diffusion plate is prevented from penetrating to the outside of the edge of the black matrix layer. Compared with the prior art, the present invention sets a row of raised retaining walls on the step part of the plastic frame, and sets a groove with the opening facing downward on the diffusion plate. When the retaining walls are inserted into the grooves, the light can be blocked by the retaining walls Penetrating to the edge of the peripheral area of the liquid crystal panel, not only can solve the light leakage problem in the existing curved display, but also can strengthen the fixed diffusion plate.

Hereinbefore, specific embodiments of the present invention have been described with reference to the accompanying drawings. However, those skilled in the art can understand that without departing from the spirit and scope of the present invention, various changes and substitutions can be made to the specific embodiments of the present invention. These changes and substitutions all fall within the scope defined by the claims of the present invention.

Claims (10)

1. A curved display capable of reducing light leakage, the curved display comprising:

the liquid crystal display panel comprises a visual area and a peripheral area positioned at two sides of the visual area, wherein the peripheral area comprises a black matrix layer;

the glue frame comprises a first step part and a second step part, wherein the first step part is positioned above the second step part;

one end of the protective glass is placed on the first step part, and the lower surface of the protective glass is attached to the liquid crystal panel;

the front frame comprises a first side edge and a second side edge, the first side edge of the front frame is attached to the rubber frame, and the second side edge of the front frame is attached to one part of the upper surface of the protective glass; and

a diffusion plate disposed on the second step portion, wherein the upper surface of the diffusion plate emits light to the liquid crystal panel;

the second step portion is provided with a retaining wall, the diffusion plate is provided with a groove with a downward opening, the groove is matched with the retaining wall in position, and the retaining wall inserted into the groove is used for blocking part of light emitted by the diffusion plate to penetrate to the outer side of the edge of the black matrix layer in the peripheral area.

2. The curved display of claim 1, wherein the depth of the trench and the thickness of the diffuser plate satisfy the following relation:

1/4*H≤D≤3/4*H；

wherein D denotes a depth of the groove, and H denotes a thickness of the diffusion plate.

3. The curved display of claim 2, wherein the height of the dam is 1 mm or 2 mm.

4. The curved display of claim 1, wherein the cross-section of the dam is rectangular, trapezoidal, or wedge-shaped.

5. The curved display of claim 1, wherein the surface of the dam includes an adhesive layer for adhering the inner wall of the groove to fix the diffuser plate to the second step.

6. The curved display of claim 1, further comprising a backlight module disposed directly below the diffuser plate.

7. The curved display of claim 6, wherein the backlight module comprises a red LED light bar, a green LED light bar, and a blue LED light bar.

8. The curved display of claim 6, wherein the backlight module further comprises a plurality of optical films stacked on the upper surface of the diffuser plate.

9. The curved display of claim 1, wherein the liquid crystal panel further comprises a control circuit attached to the lower surface of the cover glass and located between the first step and the black matrix layer.

10. The curved display of claim 9, wherein the control circuit is a flexible printed circuit board.