JPH10117313A - Plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display device to which an optical filter is mounted without warping, even if a PDP is heated. SOLUTION: A plasma display device is constituted by fitting a PDP 1 for displaying a television video or the like to a case 2, through the use of a boss or the like stood upright to a rear side of the PDP. An optical filter 3 is mounted to improve display image quality or the like to a front side of the PDP 1. A glass plate is used as a material for the optical filter 3. An elastic body made of a hard rubber or the like is mounted to a mounting part 3c of a front frame 2a in the case 2 around the optical filter 3. Then the optical filter 3 is fitted to the inside of the front frame 2a, together with a mount metallic fixture 4 with a screw or the like. A conductive film that transmits visual light such as an ITO(indium tin oxide) film or the like and shuts other electromagnetic waves is formed to a front side 3a or a rear side 3b of the optical filter 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device in which an optical filter mounted on the front of a PDP is prevented from warping due to heat from the PDP.

[0002]

2. Description of the Related Art In a plasma display apparatus using a PDP for displaying television images and the like, an optical filter is often attached to the front of the display surface of the PDP in order to improve the display characteristics of the PDP. It has been general to use an acrylic plate as a material of a conventional optical filter. But PDP
Because the heat-generating portion is concentrated on the panel portion due to the thinness, the optical filter warps due to a local difference in thermal expansion.
This causes a local temperature rise of P, which affects the life of the PDP. There is also a problem that the performance of an optical filter such as an acrylic plate is deteriorated.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a plasma display device equipped with an optical filter that does not warp even when a PDP generates heat.

[0004]

SUMMARY OF THE INVENTION A glass plate is used as a material of an optical filter to prevent warping due to heat generated in a PDP.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a plasma display device in which an optical filter is mounted on the front of a PDP for displaying television images and the like for improving display image quality, a glass plate is used as a material of the optical filter.

An elastic body such as hard rubber is attached to a portion around the optical filter to be attached to the front frame of the plasma display device.

A conductive film for preventing transmission of electromagnetic waves is formed on the surface of the optical filter.

On the surface of the optical filter, there is formed a dye film which selectively absorbs each color for correcting the color developing characteristics of the PDP.

On the surface of the optical filter, an antireflection film made of a multilayer dielectric film or the like is formed.

On the surface of the optical filter, a non-glare film (Non-glue film) made of a dielectric film or the like having fine irregularities on the surface is provided.
are film).

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a (A) plan view (section c--c in FIG. 1) of one embodiment of a plasma display device according to the present invention.
(B) It is a front view. PDP1 for displaying TV images, etc.
Is attached to the housing 2 with a boss 1a or the like standing on the back of the PDP to form a plasma display device. An optical filter 3 is mounted on the front of the PDP 1 to improve display image quality and the like. A glass plate is used as a material of the optical filter 3.

The front frame 2 of the housing 2 around the optical filter 3
An elastic body such as a hard rubber is mounted on the mounting portion 3c for a. Then, it is attached to the inside of the front frame 2a with the mounting bracket 4 by screwing or the like. Front surface 3a or back surface 3 of optical filter 3
For b, a conductive film such as an ITO (Indium Tin Oxide) film that transmits visible light and prevents transmission of other electromagnetic waves is formed.

The color development characteristics of a PDP generally deviate from the so-called white balance in a color television. Therefore, on the front surface 3a or the back surface 3b of the optical filter 3, a dielectric film or the like in which a dye such as a pigment that absorbs different amounts of light is dispersed is formed so as to correct white balance in accordance with the color development characteristics of the PDP 1. I do. Also, the surface 3a of the optical filter 3
Is formed with an antireflection film made of a multilayer dielectric film or the like. Alternatively, on the surface 3a of the optical filter 3, a non-glare film (Non-glar film) made of a dielectric film or the like having fine irregularities on the surface is provided.
e film).

The present invention is embodied in the form described above, and has the following effects.

By using a glass plate instead of acrylic as the material of the optical filter, the optical filter does not warp even if the PDP generates heat. Therefore, the distance between the optical filter and the surface of the PDP is kept constant.
Local temperature rise of the DP can be prevented, and the life of the PDP can be prolonged. In addition, the characteristics of the optical filter are not degraded due to the local rise in the temperature of the optical filter.

An elastic member such as hard rubber is attached to a portion around the optical filter to be attached to the front frame of the plasma display device, so that when the optical filter is attached to the front frame of the plasma display device, Since the stress applied to the glass plate becomes uniform, distortion is not given to the glass plate.

By forming a conductive film on the surface of the optical filter to prevent transmission of electromagnetic waves, it is possible to prevent electromagnetic waves generated from the PDP.

A so-called white balance can be easily attained by forming a dye film on the surface of the optical filter, which selectively absorbs each color for correcting the color developing characteristics of the PDP.

By forming an antireflection film made of a multilayer dielectric film or the like on the surface of the optical filter, it is possible to prevent a decrease in the contrast of the display screen due to external light.

On the front surface of the optical filter,
By forming a non-glare film (non-glare film) made of a dielectric film or the like having minute irregularities on the surface, it is possible to prevent the effective contrast of the display screen from being lowered by external light at low cost.

[Brief description of the drawings]

FIGS. 1A and 1B are a plan view (a cross section taken along the line cc) and a front view, respectively, of an embodiment of a plasma display device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 PDP 2 Housing 3 Optical filter 4 Mounting bracket

Claims (6)

[Claims] 1. A plasma display device in which an optical filter is mounted on a front surface of a PDP for displaying television images or the like for improving display image quality or the like, wherein a glass plate is used as a material of the optical filter. Plasma display device. 2. The plasma display device according to claim 1, wherein an elastic body such as hard rubber is attached to a portion of the plasma display device around the optical filter to be attached to a front frame of the plasma display device. 3. The plasma display device according to claim 1, wherein a conductive film for preventing transmission of an electromagnetic wave is formed on a surface of the optical filter. 4. The plasma display apparatus according to claim 1, wherein a dye film selectively absorbing for each color for correcting color developing characteristics of the PDP is formed on the surface of the optical filter. 5. The plasma display device according to claim 1, wherein an antireflection film made of a multilayer dielectric film or the like is formed on a surface of said optical filter. 6. A non-glare film (Non-glare film) made of a dielectric film or the like having minute irregularities on the surface of the optical filter.
2. The plasma display device according to claim 1, wherein a glare film is formed.