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Discharge tube for suppressing infrared ray communication interference, lighting apparatus for display unit, and liquid crystal display unit

A liquid crystal display device and infrared communication technology, which is applied to lighting devices, components of lighting devices, lighting and heating equipment, etc., can solve problems such as higher discharge voltage, longer electrode life, and higher potential gradient in the anode region

Inactive Publication Date: 2010-07-21
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the air pressure of the sealing gas (sealing pressure) is relatively high, the sputtering of the electrode is suppressed, the life becomes longer, and the potential gradient of the anode region becomes higher, on the other hand, the discharge start voltage becomes higher

Method used

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  • Discharge tube for suppressing infrared ray communication interference, lighting apparatus for display unit, and liquid crystal display unit
  • Discharge tube for suppressing infrared ray communication interference, lighting apparatus for display unit, and liquid crystal display unit
  • Discharge tube for suppressing infrared ray communication interference, lighting apparatus for display unit, and liquid crystal display unit

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0062] figure 1 is a schematic cross-sectional view showing the structure of the liquid crystal display device according to the first embodiment.

[0063] The liquid crystal display device according to Embodiment 1 is constituted by a lighting device 100 for a display device and a liquid crystal display panel 200 .

[0064] The lighting device 100 for a display device is a direct type backlight device for a liquid crystal display device. Its structure is: from the back side to the observation side, the backlight (BL) shield 10, reflective sheet 11, cold cathode fluorescent tube (CCFT) 12, diffusion plate 13, diffusion sheet 14, prism sheet 15, brightness enhancement A film (trade name: DBEF (Dual Brightness Enhance Film: reflective brightness enhancement film), manufactured by Sumitomo 3M Co., Ltd.) 16 and an infrared absorbing sheet 50 .

[0065] figure 2 is a schematic cross-sectional view showing the structure of the CCFT 12 . Also, the CCFT 12 is connected to a light...

Embodiment approach 2

[0078] The liquid crystal display device of the second embodiment is the same as that of the first embodiment except that the infrared absorbing sheet 50 is disposed between the prism sheet 15 and the brightness improving film 16 . According to the present embodiment, since the infrared absorbing sheet 50 absorbs more visible light than that of the first embodiment, the luminance is somewhat lower (80% compared to the luminous intensity of CCFT), but the same effect as that of the first embodiment can be obtained.

Embodiment approach 3

[0080] The liquid crystal display device of the third embodiment is the same as that of the first embodiment except that the infrared absorbing sheet 50 is disposed between the diffusion sheet 14 and the prism sheet 15 . According to the present embodiment, since the infrared absorbing sheet 50 absorbs more visible light than in the first embodiment, the luminance is somewhat lower (71% compared to the luminous intensity of CCFT), but the same effects as those in the first embodiment can be obtained.

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Abstract

A discharge tube for suppressing an infrared ray communication interference which can suppress an interference in the infrared ray communication, as well as a lighting apparatus for a liquid crystal display unit and a liquid crystal display unit using such a discharge tube. The discharge tube for suppressing an infrared ray communication interference which includes a pair of electrodes has mercury, argon gas, and noble gas with the excitation energy lower than that of the argon gas contained thereinside. An example of the noble gas includes krypton gas. The discharge tube may also contain neon gas thereinside.

Description

technical field [0001] The invention relates to a discharge tube for suppressing infrared communication interference, an illuminating device for a display device, and a liquid crystal display device. More specifically, it relates to a discharge tube for suppressing infrared communication interference, an illuminating device for a display device, and a liquid crystal display device, which are suitable for a light source of a backlight device of a liquid crystal display device. Background technique [0002] Liquid crystal display devices effectively utilize the advantages of thinness, light weight, low power consumption, and beautiful color display, and are used in many places such as homes, offices, cars, and outdoors. Among such liquid crystal display devices, a so-called reflective liquid crystal display device is used to maximize the advantages of thinness, light weight, and low power consumption, and various reflective liquid crystal display devices have been disclosed. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/16F21S2/00F21V9/04G02F1/13357F21Y103/00
CPCG02F1/133604H01J61/20G02F2201/083H01J61/16
Inventor 横田匡史
Owner SHARP KK