KR20040054188A - Structure for lamp housing of lcd - Google Patents

Abstract

PURPOSE: A lamp housing structure of an LCD(Liquid Crystal Display) is provided to prevent heat generated from a back light in a lamp housing from being transferred to an optical sheet. CONSTITUTION: An LCD includes an LCD panel, optical sheets, a back light unit, a main frame, a bottom cover, and a top case. A lamp housing(35) for fixing the optical sheets and the back light unit has a plurality of holes formed at the surface of the lamp housing. A housing reflecting plate for reflecting lights from the back light unit is coated on the lamp housing. The plurality of holes of the lamp housing include holes(37) for blocking heat from being transferred to the optical sheets and holes(38) for radiating heat.

Description

Liquid crystal display lamp housing structure {STRUCTURE FOR LAMP HOUSING OF LCD}

The present invention relates to a liquid crystal display lamp housing structure, and more particularly to a liquid crystal display that can prevent the deformation of the optical sheet by emitting heat generated in the housing surrounding the backlight and the liquid crystal display optical sheet to the outside The device lamp housing structure.

Recently, due to the rapid development of technology in the semiconductor industry, liquid crystal display devices are being manufactured with smaller and lighter weight and more powerful products. Cathode ray tube (CRT), which is widely used in information display devices, has many advantages in terms of performance and price, but has many disadvantages in terms of miniaturization or portability.

On the other hand, liquid crystal displays have been attracting attention as an alternative means of overcoming the shortcomings of CRTs because they have advantages such as miniaturization, light weight, and low power consumption. Currently, almost all information processing devices that require display devices are required. The situation is attached to.

Such liquid crystal displays generally apply voltages to specific molecular arrays of liquid crystals to convert them into other molecular arrays, and change optical properties such as birefringence, photoreactivity, dichroism, and light scattering characteristics of liquid crystal cells that emit light by such molecular arrays Is a display device using modulation of light by a liquid crystal cell by converting the light into a visual change.

Recently, various structures have been developed for slimming and lightening in order to secure the competitiveness of the product. One of them stacks and combines the backlight units, which are optical units, on the liquid crystal display panel in which the array substrate and the color filter substrate are bonded together, and inserts them into the main frame to protect them. A display mold frame structure is fabricated.

The PCB for applying a signal to the gate pad and the data pad formed at the edge of the display panel is connected with the flexible cable by TCP to which the drive IC is bonded, and is attached to the rear surface of the main frame of the liquid crystal display.

FIG. 1 is a view illustrating components assembled to a main frame of a liquid crystal display generally.

As illustrated in FIG. 1, a backlight unit is attached to a liquid crystal display panel 5 in which an array substrate in which a plurality of pixels are formed in a matrix form and a color filter substrate in which R, G, and B color filters are formed in a matrix form are bonded to each other. They are stacked together and stored in the main frame.

At one edge of the LCD panel 5, a gate printed circuit board (PCB) 7 for applying a driving signal may connect a gate pad and a gated taper package (TCP) of the LCD panel 5. It is connected by a flexible cable between them.

Similarly, at the other edge of the liquid crystal display panel 5, a data printed circuit board 9 for applying a graphic signal is connected to the data pad of the liquid crystal display panel 5 by a flexible cable. The data TCP is attached to the liquid crystal display panel 5 to apply a signal in accordance with a certain scanning method.

Under the liquid crystal display panel 5, a plurality of optical sheets 11 and a backlight 13 for generating a light source for expressing an image, and the light generated from the backlight 13, the liquid crystal display panel 5 The light guide plate 15 for converting the planar light into an area and the backlight unit 10 including the light guide plate 17 for reflecting the light leaked from the light guide plate 15 to increase the light efficiency are attached in a stacked form.

The backlight unit 10 and the liquid crystal display panel 5 are inserted in a stacked form on the main frame 21 for optical alignment while protecting from external impact. In order to prevent the liquid crystal display panel 5 from moving, a guide panel 3 may be attached to fix the liquid crystal display panel.

The main frame 21 is divided into a metal material or a plastic material. The liquid crystal display panel 5 and the backlight unit 10 are inserted into the main frame 21 in a stacked form. The panel guide 3 is coupled to the main frame 21.

Thereafter, an upper case 1 and a lower cover 22 are assembled to the liquid crystal display panel 5 and the main frame 21 in which the backlight unit 10 is housed.

The upper case 1 and the lower cover 22 serve to ground the PCB connected to the liquid crystal display panel and protect the liquid crystal display panel and the backlight unit.

2 is a cross-sectional side view of a liquid crystal display device assembled according to the related art.

As shown in FIG. 2, a liquid crystal display panel 5 is coupled to an upper portion of the main frame 21, and optical sheets 11, a backlight 13, and a rear surface of the main frame 21 are coupled to each other. The backlight unit 10 which consists of the light guide plate 15 and the reflecting plate 17 is mounted.

The reflective plate 17 is attached on the lower surface of the light guide plate 15 to reflect light emitted from the backlight 13 or to reflect light emitted to the outside when plane light is generated from the light guide plate 15.

The backlight unit 10 is fixed by the “c” shaped lamp housing 25, and optical miss alignment occurs due to vibration of the reflective plate 17, the backlight, and the light guide plate during external shock or movement. To prevent it.

When the optical sheets 11, the backlight 13, the light guide plate 15, and the reflector plate 17 are mounted on the rear surface of the main frame 21, the lower cover 22 is first coupled to the rear surface of the main frame 21. do.

The lower cover 22 not only serves to ground the PCB attached to the liquid crystal display panel 5 when the PCB is folded back to the main frame, but also the optical sheets 11, the backlight 13, and the light guide plate ( 15) and the reflecting plate 17 serves to fix so as not to escape to the outside.

When the lower cover 22 is coupled to the main frame 21, the upper case 1 is coupled to the upper portion of the main frame 21 and disposed on the main frame 21. 5) will be fixed.

When power is applied to the backlight 13 to generate light, some light is reflected in the lamp housing 25 or directly proceeds to the light incident part of the light guide plate 15 to repeat the reflection and refraction so that the light guide plate ( 15) The light of the backlight 13 reaches the front surface, which causes the plane light to be generated.

However, the lamp housing structure having the above structure secures the optical sheets, the light guide plate, and the reflecting plate while covering the entire backlight, so that heat is transmitted to the optical sheets and the reflecting plate through the metal housing to cause deformation. There is.

3 is a view illustrating a heat transfer to a reflector, a light guide plate, and optical sheets in a backlight according to the related art.

As shown in FIG. 3, when power is applied to the backlight 13 to generate light, a predetermined amount of light is reflected from the reflective film coated inside the lamp housing surrounding the backlight, or the light incident portion of the light guide plate 17 is directly reflected. Proceed to

In this way, the light is repeatedly reflected and refracted by the light guide plate 17 to generate planar light. In this case, since the light generated by the backlight 13 is first incident and reflected in the lamp housing, high heat is generated.

In addition, since the lamp housing is made of a sus material made of metal, heat generated from the lamp housing proceeds to the place where the optical sheet is disposed through the sus, and deformation of the lamp housing is caused by high heat in an area adjacent to the lamp housing. .

The present invention provides a liquid crystal display lamp housing structure that can prevent the deformation of the optical sheets of the liquid crystal display device by facilitating heat emission to the outside while preventing heat generated from the backlight in the lamp housing to be transmitted to the optical sheet. Has its purpose.

1 is a view showing components generally assembled to the main frame of a liquid crystal display.

2 is a cross-sectional side view of a liquid crystal display device assembled according to the prior art.

3 is a view showing a heat transfer to the reflector, the light guide plate, the optical sheets in the backlight according to the prior art.

4 is a perspective view showing the lamp housing structure of the liquid crystal display device according to the present invention;

5 is a view showing a lamp housing coupled to the optical sheets, the light guide plate, the reflecting plate according to the present invention.

* Description of the symbols for the main parts of the drawings *

35: lamp housing 37: blocking hole

38: emission hole 45: light guide plate

47: reflector 41: optical sheet

In order to achieve the above object, the liquid crystal display lamp housing structure according to the present invention,

In the liquid crystal display frame structure consisting of a liquid crystal display panel, an optical sheet, a backlight unit, a main frame, a lower cover and an upper case,

In order to fix the backlight unit, the lamp housing is characterized in that a plurality of holes are formed on the entire area along the circumference of fixing the optical sheets and the backlight unit.

Here, a housing reflecting plate is coated to reflect the backlight light into a plurality of holes formed on the surface of the lamp housing, and the holes formed on the lamp housing include a blocking hole for blocking heat transmission and a heat dissipation. Characterized in that composed of a discharge hole for.

In particular, the diameter of the discharge hole formed on the lamp housing is 0.5 ~ 1mm, characterized in that the blocking hole formed on the lamp housing is formed in a rectangular shape along the housing.

According to the present invention, the heat generated in the housing while maintaining the reflectance by forming the lamp housing to form a discharge hole for dissipating heat along the entire surface area and a blocking hole for preventing heat transfer toward the optical sheets, and coating the housing reflector Was easily released.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view illustrating a lamp housing structure of a liquid crystal display according to the present invention.

As shown in FIG. 4, the lamp housing 35 structure surrounds the backlight in a “c” shape to fix the light guide plate and the reflecting plate.

That is, the lamp housing 35 fixes the light guide plate and the reflecting plate stacked below the main frame while mainly surrounding the backlight inserted into the main frame edge.

The inner wall of the lamp housing 35 codes a reflective film made of silver, so that light that is opposite to the light guide plate among the light generated in the backlight is reflected as much as possible inside the lamp housing 35 to be incident toward the light guide plate. For the sake of

As described above, the heat generated by the light reflected from the backlight is large and heat is generated by the lights. This heat generation not only affects the lamp housing 35, but heat conduction proceeds through the lamp housing 35. And transmitted to the optical sheets, the reflector and the light guide plate.

Thus, in the present invention, a plurality of holes are formed along the circumference of the lamp housing, one of which is an emission hole 38 for dissipating heat generated from the backlight to the outside, and the other of which is a reflection plate which is an optical mechanism of the liquid crystal display device It is a blocking hole 37 for blocking heat transfer to the light guide plate and the optical sheets.

The discharge hole 38 is formed to discharge heat generated from the backlight to the outside of the lamp housing 35. A hole having a diameter in the range of about 0.5 mm to 1 mm is formed around the lamp housing 35. Accordingly formed a plurality at regular intervals.

The blocking hole 37 is formed along the lamp housing 35 in a rectangular shape such that the lamp housing 35 has a predetermined length between a portion fixing the light guide plate and the reflecting plate and a portion surrounding the backlight.

Although not shown in the drawing, the same may be formed to correspond to the other side region of the surface on which the blocking hole 37 is formed.

In the present invention, since the reflective film made of silver is coated inside the discharge hole 38 and the blocking hole 37 formed in the lamp housing 35, the reflection efficiency of the backlight inserted into the lamp housing 35 is increased. The heat releases heat generated therein without dropping, and also prevents deformation of the liquid crystal display optical apparatuses by heat conduction.

5 is a view showing a state in which the lamp housing according to the invention is combined with the optical sheets, the light guide plate, the reflecting plates.

As shown in FIG. 5, a portion of the backlight unit stacked on the lower side of the main frame seating the liquid crystal panel is fastened by the lamp housing 35 in which the emission hole 38 and the blocking hole 37 are formed. It looks.

The lamp housing 35 fixes the light guide plate and the reflective plate, and a backlight 33 is inserted between the lamp housing 35, and a plurality of optical sheets 41 are stacked on the light guide plate 45.

When power is applied to the backlight 33 to generate light, the generated light proceeds to the front of the light guide plate 45 while reflecting up and down at a predetermined angle along the light guide plate 45, which is generated by the backlight 33. In order to inject as much of the light as possible into the light guide plate 45, reflection occurs in the lamp housing 35 from the reflective film toward the light guide plate 45.

The heat generated in the lamp housing 35 is primarily discharged to the outside by the discharge hole 38 formed on the surface of the lamp housing 35, and the lamp housing 35 by the blocking hole 37. ) To block the heat moving toward the optical sheets 41, the light guide plate 45, and the reflecting plate 47.

That is, while the heat moving toward the light guide plate 45 is conducted while lowering the temperature as much as possible by the heat generated from the lamp housing 35, the heat is blocked by the blocking hole 37 so that the light guide plate 45 and the reflection plate (47) and the optical sheets 41 so as to be able to conduct as little heat as possible.

In addition, heat emitted from the lamp housing 35 may be discharged to the outside along the main frame, the lower cover, or the upper case of the liquid crystal display.

For example, a contact portion is formed on the outside of the lamp housing 35 to be in contact with the lower cover, so that when the cover is covered on the main frame, the heat generated can be transferred to the outside by being coupled. .

As described above, in the present invention, since the lamp housing surrounds the backlight generating high heat, the heat is prevented from being conducted to the optical sheet along the housing made of metal, thereby preventing warpage of the optical sheets, thereby improving the screen quality. Will be.

As described in detail above, the present invention has an effect of preventing deformation of the optical sheets due to heat by forming a plurality of holes in the housing surface for fixing the optical sheets, the light guide plate, and the reflective plate of the liquid crystal display device.

The present invention is not limited to the above-described embodiments, and various changes can be made by those skilled in the art without departing from the gist of the present invention as claimed in the following claims.

Claims (5)

In the liquid crystal display frame structure consisting of a liquid crystal display panel, an optical sheet, a backlight unit, a main frame, a lower cover and an upper case, And a plurality of holes are formed in the entire area along the periphery of fixing the optical sheets and the backlight unit to fix the backlight unit. The method of claim 1, And a housing reflecting plate for reflecting the backlight light into a plurality of holes formed on the surface of the lamp housing. The method of claim 1, And a hole formed on the lamp housing comprises a blocking hole for blocking heat transfer and a discharge hole for heat dissipation. The method of claim 3, wherein Liquid crystal display device lamp housing structure characterized in that the diameter of the discharge hole formed on the lamp housing is 0.5 ~ 1mm. The method of claim 3, wherein The blocking hole formed on the lamp housing has a rectangular shape along the housing.