CN102520553A - LCD device - Google Patents

Abstract

The invention provides a liquid crystal display device, which includes a liquid crystal panel and a backlight module. The backlight module is located under the liquid crystal panel, including a plastic frame, a light guide plate, a light source and an iron frame. The plastic frame carries the liquid crystal panel, including horizontal frame sides and vertical frame sides. The horizontal frame side includes a main body and a light-transmitting part. The light-transmitting part is connected to the main body and carries the liquid crystal panel together with the main body. The vertical frame side is connected to the horizontal frame side and forms an accommodating space with the horizontal frame side. The light guide plate is located under the liquid crystal panel and accommodated in the plastic frame. The light source is located on one side of the light guide plate and is arranged on the side of the vertical frame. The iron frame covers the liquid crystal panel, the plastic frame and the light guide plate. Wherein, the light emitted by the light source passes through the light guide plate and passes through the light-transmitting portion. By adopting the present invention, without reducing the carrying area of the plastic frame, the effect of narrowing the frame can be greatly reduced, the problem of dark bands caused by increasing the viewing angle can be avoided, and the visual taste can be improved.

Description

A liquid crystal display device

technical field

The invention relates to a liquid crystal display device, in particular to a liquid crystal display device capable of increasing the viewing angle.

Background technique

Liquid Crystal Display (LCD) has been widely used in portable information products such as notebook computers and personal digital assistants due to its thin and light appearance, low power consumption and no radiation pollution. Liquid crystal display technology is the most attention-grabbing and fastest-growing display technology among flat-panel display technologies today. With the vigorous development of liquid crystal display technology, next-generation technologies have been developed one after another, and the size of liquid crystal displays (LCDs) is also increasing day by day. In order to increase the size of the liquid crystal display (LCD), the plastic frame is developing towards a narrower frame. However, this will reduce the area of the plastic frame carrying the LCD panel, which will undoubtedly increase the difficulty of panel assembly and the risk of damage. However, if you continue to use the traditional plastic frame, the light will be blocked by the edge of the plastic frame at a large viewing angle. The visual taste of the display is not good, the display quality cannot meet the specification requirements, and the market competitiveness will be greatly reduced.

In view of this, how to design a liquid crystal display device that can increase the viewing angle and enhance the visual taste without reducing the carrying area of the plastic frame is a subject that professional technicians need to address.

Contents of the invention

Aiming at the defect of using traditional plastic frame liquid crystal display in the prior art that the edge dark band phenomenon occurs when viewed at a large viewing angle in order not to reduce the bearing area of the plastic frame to the liquid crystal panel, the present invention provides a liquid crystal display device.

According to the present invention, a liquid crystal display device is provided, wherein the liquid crystal display device includes:

LCD panels; and

The backlight module, located below the liquid crystal panel, includes:

Plastic frame, including:

The horizontal frame, carrying the liquid crystal panel, includes:

subject, and

a light-transmitting part, connected to the main body, and carrying the liquid crystal panel together with the main body; and

the vertical frame side is connected to the horizontal frame side and forms an accommodating space with the horizontal frame side;

a light guide plate, located below the liquid crystal panel and accommodated in the plastic frame;

The light source is located on one side of the light guide plate and is arranged on the edge of the vertical frame; and

an iron frame covering the liquid crystal panel, the plastic frame and the light guide plate,

Wherein, the light emitted by the light source passes through the light guide plate through the light-transmitting portion.

Preferably, the transparent part is integrally formed with the main body.

Preferably, the transparent part and the main body are formed by double injection molding.

Preferably, the transparent part is made of transparent plastic material.

Preferably, the transparent part adopts a hollow design.

Preferably, the light-transmitting part is connected to the horizontal frame edge by clamping, and the light-transmitting part is made of transparent plastic material.

Preferably, a hook is provided on the body, and a slot is correspondingly provided on the light-transmitting portion, and the hook cooperates with the slot to connect the body and the light-transmitting portion.

Preferably, the backlight module further includes a reflective sheet located under the light guide plate and housed in the plastic frame.

Preferably, the backlight module further includes at least one optical film located above the light guide plate and housed in the plastic frame.

The advantages of adopting the present invention are: the edge of the plastic frame adopts a light-transmitting design, which not only makes the plastic frame have sufficient bearing capacity for the liquid crystal panel, but also achieves the effect of narrowing the frame, and does not appear the problem of dark bands on the edge when viewed from a large viewing angle , thereby enhancing the visual taste.

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 cross-sectional view of a liquid crystal display device in the prior art.

FIG. 2 is a schematic cross-sectional view of a liquid crystal display device according to an embodiment of the invention.

FIG. 3 shows a schematic cross-sectional view of a liquid crystal display device according to another embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a liquid crystal display device according to yet another embodiment of the present invention.

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.

As mentioned above, in the prior art, when the narrow frame design is adopted to reduce the width of the plastic frame, the carrying area of the plastic frame for the LCD panel is insufficient. Dark banding, therefore, affects visual quality.

In order to solve this problem in the prior art, FIG. 1 shows a schematic cross-sectional view of a liquid crystal display device in the prior art.

Referring to FIG. 1 , a liquid crystal display device 1 includes: a liquid crystal panel 10 and a backlight module 11 . Wherein, the backlight module is located under the liquid crystal panel 10 and includes: a plastic frame, a light guide plate 11 , a light source 12 and an iron frame 13 . The plastic frame has a horizontal frame side 14 and a vertical frame side 15 , and the horizontal frame side 14 carries the liquid crystal panel 10 . The vertical frame 15 is connected to the horizontal frame 14 and forms an accommodating space with the horizontal frame 14 . The light guide plate 11 is located under the liquid crystal panel 10 and accommodated in the plastic frame. The light source 12 is located on the side of the light guide plate 11 and accommodated in the plastic frame. The iron frame 13 covers the liquid crystal panel 10 , the plastic frame and the light guide plate 11 . As shown in FIG. 1 , in order to provide enough carrying area to carry the liquid crystal panel 10, the horizontal frame edge 14 of the plastic frame is relatively wide, so that the light 121 emitted from the light source 12 will be horizontally framed after passing through the light guide plate 11. The edge of side 14 is blocked, therefore, in this case, when the user watches at a large viewing angle (such as when greater than 45°), the user will see that there are dark bands in some areas of the edge of the liquid crystal display device 1, thus affecting the liquid crystal display. The visual taste of the display device 1 greatly reduces market competitiveness.

FIG. 2 is a schematic cross-sectional view of a liquid crystal display device according to an embodiment of the invention. Referring to FIG. 2 , the liquid crystal display device 2 includes: a liquid crystal panel 20 and a backlight module. Wherein, the backlight module is located under the liquid crystal panel 20 and includes: a plastic frame, a light guide plate 21 , a light source 22 and an iron frame 23 . The plastic frame carries the liquid crystal panel 20, including a horizontal frame side 24 and a vertical frame side 25. The horizontal frame side includes a body 241 and a light-transmitting portion 242. The light-transmitting portion 242 is connected to the body 241 and carries the liquid crystal panel 20 together with the body 241. . In this embodiment, the light-transmitting portion 242 and the body 241 are integrally formed, more specifically, double-material injection molding is adopted, and the light-transmitting portion 242 is made of transparent plastic material. The vertical frame 25 is connected to the horizontal frame 24 and forms an accommodating space with the horizontal frame 24 . The light guide plate 21 is located under the liquid crystal panel 20 and accommodated in the plastic frame. The light source 22 is disposed beside the light guide plate 21 and on the vertical edge 25 of the plastic frame. In addition, in a specific embodiment, the backlight module may further include at least one optical film 26 disposed above the light guide plate 21 . In another specific embodiment, the backlight module may further include a reflective sheet 27 disposed under the light guide plate 21 to reflect the light from the light guide plate 21 to improve light extraction efficiency. Since in this embodiment, the light-transmitting portion 242 can be made of light-transmitting material, such as transparent plastic, therefore, when the light 221 emitted from the light source 22 passes through the light guide plate 21 and the optical film 26 and reaches the light-transmitting portion 242, it can pass through Through the light-transmitting part 242 and enter the range of a large viewing angle θ (for example greater than 45°), when the viewing angle is , as far as the viewer is concerned, the dark band phenomenon will not be observed at the edge of the liquid crystal display device 2 . The iron frame 23 covers the periphery of the liquid crystal display device 2 to fix the liquid crystal panel 20 and other components of the backlight module.

FIG. 3 shows a schematic cross-sectional view of a liquid crystal display device according to another embodiment of the present invention. Referring to Fig. 3, in another specific embodiment, the body 241 and the light-transmitting part 242 of the horizontal frame edge 24 of the plastic frame are also integrally formed, but the difference from the embodiment shown in Fig. 1 is that the light-transmitting part is hollowed out Therefore, after the light 221 emitted from the light source 22 passes through the light guide plate 21 and the optical film 26, it can pass through the hollowed-out position 243 of the light-transmitting part 242, which can also avoid the phenomenon of dark bands when viewing from a large viewing angle. .

FIG. 4 is a schematic cross-sectional view of a liquid crystal display device according to yet another embodiment of the present invention. Referring to Fig. 4, in yet another specific embodiment, different from the embodiment shown in Fig. 2 and Fig. 3, the body 241 of the horizontal frame edge 24 of the plastic frame is connected with the light-transmitting part 242 in a snap-fitting manner, specifically, As shown in Figure 4, a hook 244 is provided on the main body 241, and a slot (not marked) is correspondingly provided on the light-transmitting part 242 to cooperate with the hook 244. Therefore, through the cooperation of the hook 244 and the slot, light transmission The part 242 can be engaged with the body 241 . Of course, the hook 244 can also be provided on the light-transmitting portion 242 , and the corresponding slot can be provided on the body 241 . The light-transmitting portion 242 can be made of light-transmitting material, such as transparent plastic. In this way, the light 221 from the light source 22 can pass through the light-transmitting portion 242 after passing through the light guide plate 21 and the optical film 26 , so as to prevent the viewer from seeing dark bands when watching from a large viewing angle.

According to the present invention, a light-transmitting structure is designed on the edge of the plastic frame. This light-transmitting structure can be used as a part of the plastic frame to provide a bearing area for the liquid crystal panel, and can allow light to pass through without reducing the plastic frame’s performance on the liquid crystal panel. At the same time, it achieves the effect of narrow frame. For the viewer, they will not see the phenomenon of dark bands at the edge when viewing from a large viewing angle, thus improving the visual taste.

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 (9)

1. A liquid crystal display device, characterized in that, comprising: LCD panels; and The backlight module, located below the liquid crystal panel, includes: The plastic frame, carrying the liquid crystal panel, includes: Horizontal borders, including: subject, and a light-transmitting part, connected to the main body, and carrying the liquid crystal panel together with the main body; and the vertical frame side is connected to the horizontal frame side and forms an accommodating space with the horizontal frame side; a light guide plate, located below the liquid crystal panel and accommodated in the plastic frame; The light source is located on one side of the light guide plate and is arranged on the edge of the vertical frame; and an iron frame covering the liquid crystal panel, the plastic frame and the light guide plate, Wherein, the light emitted by the light source passes through the light guide plate through the light-transmitting portion. 2 . The liquid crystal display device according to claim 1 , wherein the light-transmitting portion is integrally formed with the body. 3 . 3 . The liquid crystal display device according to claim 2 , wherein the light-transmitting portion and the body are formed by double injection molding. 4 . 4. The liquid crystal display device according to claim 3, wherein the transparent part is made of transparent plastic material. 5. The liquid crystal display device according to claim 2, wherein the light-transmitting portion adopts a hollow design. 6 . The liquid crystal display device according to claim 1 , wherein the light-transmitting portion is connected to the body by clamping, and the light-transmitting portion is made of transparent plastic material. 7 . 7. The liquid crystal display device according to claim 6, wherein a hook is provided on the body, and a slot is correspondingly provided on the light-transmitting part, and the hook cooperates with the slot to connect The body and the transparent part. 8. The liquid crystal display device according to any one of claims 1 to 7, wherein the backlight module further comprises a reflective sheet located under the light guide plate and housed in the plastic frame . 9. The liquid crystal display device according to any one of claims 1 to 7, wherein the backlight module further comprises at least one optical film located above the light guide plate and accommodated in the glue box.

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