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Liquid crystal display device

一种液晶显示装置、液晶元件的技术，应用在非线性光学、仪器、光学等方向，能够解决蓝色纯度低下等问题

Active Publication Date: 2005-12-28
JAPAN DISPLAY INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is mainly due to the low purity of blue

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0086] The liquid crystal display device in this embodiment is the same as the existing structure, and its schematic diagram is as follows figure 2 shown. Different from the existing ones, the green phosphor material used in CCFL is different. In this embodiment, the green phosphor material uses a mixed green phosphor, specifically using LaPO 4 : Tb, Ce and Y 2 SiO 5 : Tb, Ce. Next, the manufacture of CCFLs using these phosphors and the manufacture of liquid crystal display devices using the CCFLs will be described.

[0087] Schematic diagram of the fabrication steps of CCFL, such as Figure 11 shown. In addition, the structure of the fabricated CCFL is shown in Fig. 3(a). First, a binder such as alumina and various phosphor materials are mixed in an organic solvent called a vehicle. In this example, BaMgAl previously used for blue phosphors and red phosphors were used 10 o 17 :Eu and Y 2 o 3 :Eu. Alternatively, for the green phosphor, use LaPO as previously descr...

Embodiment 2

[0096] Compared with Embodiment 1, this embodiment uses a different mixed green phosphor. Other constitutions are the same as in Embodiment 1. In this embodiment, the mixed green phosphor uses LaPO 4 : Tb, Ce and Y 3 al 5 o 12: Tb, Ce mixed green phosphor. The mixing ratio is set as LaPO in molar ratio 4 : Tb, Ce / Y 3 Al 5 o 12 : Tb, Ce=0.1 / 0.9.

[0097] Figure 12 (a) shows the emission spectra of these mixed green phosphors. The shape of the spectrum and the commonly used LaPO 4 : Tb, Ce are basically the same. In addition, the response characteristic is τ on = 2.8msec, τ off = 4.0msec, with the usual LaPO 4 : Compared with Tb and Ce, it is shortened to about 60%.

[0098] in addition, Figure 12 (b) shows the color reproduction range of the liquid crystal display device obtained in this example. Compared with the characteristics of the liquid crystal display device in Comparative Example 1 described later, the color reproduction range hardly changed. The c...

Embodiment 3

[0101] Compared with Embodiment 1, this embodiment uses a different mixed green phosphor. Other constitutions are the same as in Embodiment 1. In this embodiment, the mixed green phosphor uses LaPO 4 : Tb, Ce and LaOCl: Tb, Ce mixed green phosphor. The mixing ratio is set as LaPO in molar ratio 4 : Tb, Ce / LaOCl: Tb, Ce=0.3 / 0.7.

[0102] Figure 13 (a) represents the emission spectrum of the mixed green phosphor. The shape of the spectrum and the commonly used LaPO 4 : Tb, Ce are basically the same. In addition, the response characteristic is τ on = 2.4msec, τ off = 3.0msec, with the usual LaPO 4 : Compared with Tb and Ce, it is shortened to almost 50%.

[0103] in addition, Figure 13 (b) shows the color reproduction range of the liquid crystal display device obtained in this example. Compared with the characteristics of the liquid crystal display device in Comparative Example 1 described later, the color reproduction range hardly changed. The chromaticity change ...

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Abstract

To provide a liquid crystal display device corresponding to animation that can simultaneously satisfy animation characteristics, color reproducibility, and reliability. Including: white light source, with blue fluorescent body, green green fluorescent body and red red fluorescent body with luminous color, which has a light-on state and a light-off state within one frame; liquid crystal element, which has Each pixel adjusts the amount of light transmitted from the white light source, and a color filter that transmits any one of blue, green, and red light for each pixel. The blue phosphor, green phosphor, and red phosphor At least one of the phosphors is a mixed phosphor formed by mixing at least two phosphors with different matrix material compositions, and phosphors having the same element in the luminescent center are used in the phosphor mix of the same color.

Description

technical field [0001] The present invention relates to a white light source provided with a mixed phosphor and a filter liquid crystal display device using the light source. Background technique [0002] Liquid crystal display devices such as figure 2 Shown consists of backlight element 1 and element 2. And the backlight element consists of a white light source ( figure 2 Intermediate cold cathode tube 5), a transformer 9 for driving a white light source, a reflector 4, a metal frame 3, a diffusion plate 6, a prism sheet 7 (7A, 7B), and a polarizing reflector 8 are formed. [0003] A white light source in a liquid crystal display generally utilizes a three-wavelength cold cathode tube 5 (CCFL: Cold Cathode Fluorescent Lamp). The structure of CCFL is shown in Fig. 3(a). The drawing shows a cross-sectional view of a plane parallel to the main axis direction of the CCFL. As shown in the figure, in CCFL, mercury gas and rare gas are sealed in a glass tube 11, a phosphor 12...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02F1/13357
CPCG02F1/133604G02F1/133609
Inventor 冲代贤次今村伸椎木正敏
Owner JAPAN DISPLAY INC
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