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Plasma display device

A technology for plasma and display devices, which is applied to AC plasma display panels, identification devices, optical/shielding devices, etc., and can solve problems such as damage to plasma display devices and deterioration of color tone films

Inactive Publication Date: 2010-05-26
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] exist Figure 17 In this structure, for example, there is a problem that the color tone film, which is easily affected by temperature, deteriorates due to the heat generated by the plasma display panel 100.
A more profound problem is that the plasma display device is easily damaged by mechanical impact from the outside due to the absence of the front panel 40

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Figure 4 is a schematic diagram showing the first embodiment of the present invention. Figure 4 It is a diagram in which only the plasma display panel 100 and the front panel 40 are taken out of the plasma display device of the present invention. exist Figure 4 In this example, a contrast improving film (CRF) 50 as a black stripe film is pasted on a plasma display panel 100 formed of a front substrate 1 and a rear substrate 2 . As described above, the CRF 50 is alternately arranged in the vertical direction with light transmission portions extending in the horizontal direction for transmitting light from the plasma display panel 100 and edges for absorbing light from the outside (external light). A black light absorbing layer extending horizontally. When viewed from the image viewing side, the black light-absorbing layer extending in the horizontal direction forms stripes. The front panel 40 is arranged at a distance D from the plasma display panel 100 . The dis...

Embodiment 2

[0092] Figure 12 is a sectional view showing a second embodiment of the present invention. Figure 12 It is a cross-sectional view showing a state where CRF 50 is pasted on front substrate 1 of plasma display panel 100 . exist Figure 12In , the output-side substrate 54 and the incident-side substrate 53 of the CRF 50 are omitted. The biggest difference between this embodiment and Embodiment 1 is that the pitch of the light absorbing parts 51 of the CRF 50 is much larger than that of Embodiment 1, and it is different from the scan electrodes 20 formed on the front substrate 1 of the plasma display panel 100. It is consistent with the distance between the discharge sustaining electrodes 10 .

[0093] The present embodiment is characterized in that since the light absorbing portion 51 of the CRF 50 is consistent with the distance between the scan electrode 20 and the discharge sustain electrode 10, no moire is generated at all. That is, since the light absorbing portion 51 ...

Embodiment 3

[0103] Figure 13 is a sectional view showing a third embodiment of the present invention. Figure 13 It is a cross-sectional view showing that the front panel 40 is arranged at a distance D from the front substrate 1 of the plasma display panel 100 . exist Figure 13 Herein, the distance D between the plasma display panel 100 and the front panel 40 is 5 mm to 10 mm.

[0104] exist Figure 13 Among them, the shape of the CRF50 directly pasted on the plasma display panel 100 is the same as Figure 6 Example 1 shown is the same. The difference between the present embodiment and the first embodiment is that the light absorbing portion 51 of the CRF 50 is formed of a conductive material. exist Figure 13 , the light absorbing parts 51 are separated from each other, as Figure 14 As shown, CRF bus electrodes 55 are formed on both sides of the CRF 50 , for example. For example, a reference potential such as a ground potential can be applied to all the light absorbing portion...

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PUM

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Abstract

A plasma display device refines contrast, suppresses moire, and maintains mechanical strength against shocks from the outside of the device. A front panel (40) is disposed at a distance D from the front of the plasma display panel (100). A contrast refine film (50) in which light absorption parts and light transmission parts extending in the same direction as scanning electrodes, discharge sustaining electrodes, and the like, which are formed on the plasma display panel (100), are formed with a certain pitch is stuck to the front substrate (1) of the plasma display panel (100). This helps to refine contrast and suppress moire below a proper level. An antireflection film, a color tone film, an electromagnetic radiation preventing film, a near-infrared absorption film, and the like are all disposed in the front panel (40). This helps to prevent deterioration of each optical film during operation.

Description

technical field [0001] The present invention relates to a display device, in particular to a plasma display device with improved contrast. Background technique [0002] Plasma display devices using plasma display panels (PDPs) are in increasing demand as thin displays capable of displaying large screens in particular. A plasma display device is composed of a plasma display panel, a front panel disposed on the front of the plasma display panel, a driving circuit disposed on the back of the plasma display panel, a frame for housing these components, and the like. [0003] The front panel generally has layers such as an anti-reflection film, an anti-electromagnetic wave radiation film, and a color filter for adjusting the color tone of an image, and is formed of resin such as glass or PET as a substrate. A plasma display panel is composed of a front substrate on which scan electrodes, sustain electrodes, etc. are formed, and a rear substrate on which address electrodes, etc. a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F9/00G02B5/00
CPCH01J11/44H01J2211/446H01J2211/444H01J11/12
Inventor 久保田秀直海崎一洋本田大介
Owner HITACHI LTD