KR19990058171A - Backlight structure of the LCD device - Google Patents

Abstract

The present invention relates to a backlight structure of an LCD device, and in the present invention, by changing the structure of the light guide plate so that the upper part of the lamp is blocked by the light guide plate, and through this structure to prevent the light shining to the LCD panel, The overall display quality of can be significantly improved.

Description

Backlight structure of the LCD device

The present invention relates to a back light structure of a liquid crystal display (LCD) device (hereinafter, referred to as "LCD"), and more particularly, by blocking light transmitted from a lamp toward the LCD panel through a protrusion. The present invention relates to a backlight structure of an LCD device capable of significantly improving the overall display quality of the LCD device.

Recently, as the modern society becomes information socialized, the importance of the LCD device, which is one of the information display devices, is gradually increasing.

In such an LCD device, the role and function of the backlight are becoming more and more important problems, because the size and light efficiency of the LCD device vary depending on the structure of the backlight, which affects the mechanical and optical characteristics of the overall LCD device. to be.

As shown in FIG. 1, a lamp 2 used as a light source of an LCD device is installed at one side of the light guide plate 1, and the lamp 2 is wrapped in a lamp reflector 3.

In this case, a rear reflector (not shown) reflecting the light of the lamp 2 is formed on the rear surface of the light guide plate 1 at a predetermined distance from the light guide plate 1, and the incident light is uniformly disposed on the front surface of the light guide plate 1. Diffusion plate 4 is formed.

In addition, the prism sheet 5 for improving the brightness of the incident light is formed on the front surface of the diffuser plate 4 in doubles 5a and 5b. Usually, since the prism sheet 5 is sensitive to scratches, a protective film 6 having a protective function is attached to the front surface of the prism sheet 5 to protect the prism sheet.

On the other hand, an LCD panel (not shown) for displaying information is placed in front of the protective film 6 to perform a good information display function.

By the way, in the backlight structure of the conventional LCD device having such a configuration, a fine gap (Gap) is present between the lamp reflecting plate 3 and the light guide plate 1, where the various directions irradiated from the lamp 2 Part of the light penetrates this gap and leaks in the direction of arrow I to shine on the LCD panel, resulting in a significant deterioration of the display quality of the entire apparatus.

Therefore, an object of the present invention is to change the structure of the light guide plate so that the upper part of the lamp is blocked by the light guide plate, and by preventing the light shining to the LCD panel through this structure, it is possible to significantly improve the overall display quality of the device There is to help.

1 is a cross-sectional view schematically showing a backlight structure of a conventional LCD device.

2 is a cross-sectional view schematically showing the backlight structure of the LCD device according to the present invention;

The present invention for achieving the above object and the lamp; A light guide plate formed on one side of the lamp; A rear reflection plate formed to be spaced apart from the rear surface of the light guide plate by a predetermined distance; A diffusion plate formed on an entire surface of the light guide plate; A prism sheet formed on the entire surface of the diffusion plate; It includes a protective film formed on the entire surface of the prism sheet, the light-receiving portion side of the light guide plate is formed integrally with the light guide plate, characterized in that the protrusion is formed to block a part of the light irradiated from the lamp.

Preferably, the light blocking portion for blocking the light irradiated from the lamp is formed in the predetermined portion of the protrusion.

Preferably, the light shielding portion is coated with black paint or taped with black tape.

Accordingly, in the present invention, the conventional light leakage phenomenon is prevented in advance.

Hereinafter, the backlight structure of the LCD device according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the backlight structure of the LCD device according to the present invention includes a lamp 2, a light guide plate 10 formed at one side of the lamp 2, and a rear surface spaced apart from the rear surface of the light guide plate 10 by a predetermined distance. And a reflecting plate, a diffusion plate 4 formed on the entire surface of the light guide plate 10, a prism sheet 5 formed on the entire surface of the diffusion plate 4, and a protective film formed on the entire surface of the prism sheet 5.

In this case, an upper part of the light guide plate 10 is formed integrally with the light guide plate 10, and a protrusion 11 is formed to block a part of the light emitted from the lamp 2. Accordingly, the light traveling in the direction of arrow II is completely blocked by the protrusions 11.

In the conventional case, light emitted from the lamp leaks out toward the LCD panel through the minute gap existing between the lamp reflector and the light guide plate, resulting in a significant deterioration of the overall display quality of the LCD device.

However, in the case of the present invention, as described above, the light irradiated toward the LCD panel among the light irradiated from the lamp 2 is completely blocked by the protrusion 11, so that the overall display quality of the LCD device is remarkably improved.

At this time, preferably, the light blocking portion 20 for more effectively blocking the passage of light is formed on the upper portion of the protrusion (11).

Here, preferably, the light shield 20 is coated with black paint or taped with black tape. Since the black paint or black tape is a consumable that can be easily obtained in an LCD production line, and is a material that can provide a light and perfect light blocking effect, when the light shielding part 20 is shielded with such a material, the protrusions 11 ) Can more completely block the light emitted from the lamp.

In the backlight structure of the LCD device according to the present invention, first, the light irradiated from the lamp 2 is directly incident into the light guide plate 10 or reflected by the lamp reflector 3 to enter one side of the light guide plate 10. When the light guide plate 10 is incident, the light guide plate 10 transmits incident light to the diffuser plate 4 coated on the front surface of the light guide plate 10.

At this time, as described above, since the protrusion 11 of the present invention is formed on the light incident part side of the light guide plate 10, the light traveling in the arrow II direction is blocked by the protrusion 11 and then directed to the light guide plate 10. It is incident again. Accordingly, the overall display quality of the LCD panel is significantly improved.

Subsequently, the diffuser plate 4 transmits light incident from the light guide plate 10 to the prism sheet 5 coated on its front surface, and the prism sheet 5 transmits light incident from the diffuser plate 4 to itself. Transfer to the protective film 6 is coated on the front.

Then, the protective film 6 transmits the light incident from the prism sheet 5 to the back of the LCD panel, thereby displaying appropriate information desired by the user on the LCD panel.

Thus, in the present invention, by blocking the light transmitted from the lamp toward the LCD panel through the projection, it is possible to significantly improve the overall display quality of the LCD device.

The present invention has an overall useful effect in all kinds of LCD devices to be produced in the production line.

And while certain embodiments of the invention have been described and illustrated, it will be apparent that the invention may be embodied in various modifications by those skilled in the art.

Such modified embodiments should not be understood individually from the technical spirit or point of view of the present invention and such modified embodiments should fall within the scope of the appended claims of the present invention.

In the backlight structure of the LCD device according to the present invention as described above in detail by changing the structure of the light guide plate so that the upper part of the lamp is blocked by the light guide plate, and by preventing the light shining to the LCD panel through this structure, The overall display quality of the device can be significantly improved.

Claims (3)

With a lamp; A light guide plate formed on one side of the lamp; A rear reflection plate formed to be spaced apart from the rear surface of the light guide plate by a predetermined distance; A diffusion plate formed on an entire surface of the light guide plate; A prism sheet formed on the entire surface of the diffusion plate; It includes a protective film formed on the entire surface of the prism sheet, And a protrusion formed integrally with the light guide plate and configured to block a portion of light emitted from the lamp, at a predetermined portion of the light guide plate side of the light guide plate. The backlight structure of the LCD device of claim 1, wherein a light shielding part is formed at a predetermined part of the protrusion to block light emitted from the lamp. 3. The backlight structure of claim 2, wherein the light shield is coated with black paint or taped with black tape.