CN2378789Y

CN2378789Y - Colour cold cathode picture element tube

Info

Publication number: CN2378789Y
Application number: CN 99217500
Authority: CN
Inventors: 张苑岳; 李俊康
Original assignee: Beijing Weitu Economic & Commercial Co
Current assignee: Beijing Weitu Economic & Commercial Co
Priority date: 1999-08-02
Filing date: 1999-08-02
Publication date: 2000-05-17
Anticipated expiration: 2009-08-02

Abstract

The utility model relates to a color cold cathode picture element tube, which comprises light sources of three primary colors of red, green and blue and a drive circuit, wherein, the light sources of the three primary colors are cold cathode tubes; each of the cold cathode tubes is respectively arranged in an assigned position in a reflecting surface; the light outlet surfaces of each of the cold cathode tubes are respectively provided with a soft light plate of the color corresponding to that of the cold cathode tube, and the soft light plates are enclosed in a heat preservation shell body with the drive circuit together to form the color cold cathode picture element tube. The color cold cathode picture element tube of the utility model is particularly suitable for manufacturing a graph, text and image display screen of a colossal screen, and the utility model has the advantage of favorable cost performance ratio.

Description

Colored cold cathode pixel pipe

The utility model relates to a kind of colored cold cathode pixel pipe, particularly, relates to the colored cold cathode pixel pipe that can be used for outdoor full color look ultra-large screen display system.

At present, common large screen display system is if with " display element " classification, mainly contain following six kinds:

The incandescent lamp alveolitoid: monochrome, polychrome and full color are arranged, can be used for indoor outer the demonstration, have brightness height, advantage that color is good, but exist the life-span short, energy consumption height, reaction velocity are slow, resolution and the not high shortcoming of ash level.

The video wall type: form by some televisors, colored good, resolution and the ash level is high, reaction velocity is fast, video effect good, but brightness is low, can only be used for ambient brightness low situation under use and the shortcoming that exists image to cut apart for each teletron.

The picture dot cast: have brightness height, the good advantage of colored good, visual display effect, shortcoming be the life-span short, energy consumption is high and cost an arm and a leg etc.

The pixel cast: principle of work and picture dot tubing seemingly, different is to have concentrated a plurality of display elements on a pixel pipe module, advantage is that elemental area is little, be fit to make the open air screen of about tens square metres of areas, but shortcoming is that the life-span is short, price is higher.

LED (light emitting diode) type: each pixel is made up of the light emitting diode of three kinds of colors of red, green, blue, advantage is brightness height, colored good, resolution and ash high, energy-conservation, long-life of level, being fit to the indoor outer usefulness that shows, also is present screen area product of ratio of performance to price optimum in the large screen display system below 100 square metres.But,, be restricted in the use because green and blue led price are too expensive for more large-area on-screen display system.

Liquid crystal large screen projection type: have the various advantages that video shows, but brightness is low, area can not be done too greatly, only is applicable on the extremely low little occasion of ambient brightness to use.

In sum, existing large screen display system all has the relative merits of self for different service conditions and occasion.But along with the expansion of advertisement business, require to provide especially big on-screen display system, increase gradually as the demand of the screen more than the hundreds of square metre, and existing large screen display system is also all not ideal enough on the ratio of performance to price in some occasions.Therefore, research and development new display spare just becomes urgent requirement.

The utility model is researched and developed for overcoming above-mentioned deficiency, and its purpose is to provide a kind of can be used for large screen display system, and the ratio of performance to price is good, the colored cold cathode pixel pipe of stable and reliable operation.

According to colored cold cathode pixel pipe of the present utility model, comprise red, green, blue three primary light source and driving circuit, wherein said three primary light source is a cold-cathode tube; Each described cold-cathode tube is loaded on the assigned position in the reflecting surface respectively; And on the exiting surface of each described cold-cathode tube, be respectively equipped with the softbox of respective color, be encapsulated in the insulation shell together with described driving circuit and constitute.

Colored cold cathode pixel pipe of the present utility model, has white brightness height (＞10,000cd/ square metre), colored good, long service life (＞10,000 hour), energy consumption relatively low (every pixel＜10 watt), the fast advantage of reaction velocity, can be used as video display.

Below, in conjunction with the accompanying drawings, describe embodiment of the present utility model in detail.

Fig. 1 illustrates the structure partial cut-open view of colored cold cathode pixel pipe;

Fig. 2 a and Fig. 2 b illustrate the front elevation and the side view of a kind of structure of pixel pipe itself respectively;

Fig. 3 a and Fig. 3 b illustrate the front elevation and the side view of the another kind of structure of pixel pipe itself respectively;

Fig. 4 illustrates the schematic structure cut-open view of colored cold cathode pixel pipe.

At first, in conjunction with Fig. 1, the one-piece construction of colored cold cathode pixel pipe is described.

Colored cold cathode pixel pipe of the present utility model is by housing 1; Cylindricality reflecting surface 2; Be loaded on three cold cathodes (CFL) pipe 3 of the red, green, blue three primary colours of assigned position in the reflecting surface; And be contained in CFL and manage softbox 4 on 3 exiting surfaces, be encapsulated in the housing together with driving circuit and form.

More particularly, the housing 1 of this colored CFL pixel pipe is made of plastics, and has certain insulation effect.Being installed on three CFL pipes 3 in this housing 1, is respectively the cold cathode fluorescent tube of the red, green, blue three primary colours of high-luminous-efficiency.Because CFL pipe electrode pressure drop higher (about 100 volts) must increase luminotron length and could improve luminescence efficiency as far as possible, increase pipe range so adopt Fig. 2 to be connected in series mutually with version-22 " V " shown in Figure 3.Show the warp architecture form of CFL pipe 3 and the configuring condition of cold cathode electrode 5 among Fig. 2 and Fig. 3 respectively.

And cylindricality reflecting surface 2 is made of plastics.This reflecting surface 2 should be managed 3 shapes with CFL and is complementary, and is positioned at its rear, and promptly this CFL fluorescent tube 3 installs to the assigned position in the cylindricality reflecting surface 2, and this cylindricality reflecting surface 2 is along the length direction extension of CFL fluorescent tube 3, as shown in Figure 1 and Figure 4.Because this cylindricality reflecting surface 2 has the light that the CFL fluorescent tube is sent and works the effect of converging, so improved the light intensity that penetrates.In addition, with regard to pixel-pitch from, as shown in Figure 3, its relative efficient lighting area can reach 78%.

Softbox 4 is frosted flat glass plate 4r, 4g, 4b of three kinds of colors of red, green, blue, be installed in corresponding separately exiting surface respectively with color CFL fluorescent tube 3r, 3g, 3b place reflective cylinder partial, promptly it is configured in the place ahead of three CFL pipes of three kinds of colors of red, green, blue, as shown in Figure 4.The main effect of this softbox 4 is that the light that improve the three primary colours excitation, utilizes the scattering of light principle to make the observer feel that the CFL pixel pipe is launched is evenly distributed, and secondly is that the depth that can select to put up colour filter film color on the softbox is regulated contrast.

As everyone knows, the luminescence efficiency of CFL pixel pipe changes along with operating ambient temperature, to being used in the CFL pixel pipe in the north, should be taken into account that the winter outdoor temperature is very low, in order to keep higher luminescence efficiency, except this housing 1 has certain insulation effect, posistor (PTC) temperature controller also is set in housing, the CFL pixel pipe is remained in the needed temperature range of operation, cross the low influence that causes luminance difference to be brought because of environment temperature with each CEL fluorescent tube in the elimination pixel pipe.

At last, each parts recited above are contained in the housing that same plastics make and form colored cold cathode pixel pipe.

Constituting centre distance according to the design of above-mentioned embodiment is 3 " pixel pipe, white brightness＞13 that record at 10 meters, 000cd/ square metre; centre plane brightness＞10; 000cd/ square metre, the highest 128 gray scales that show, contrast can be regulated the colour filter film depth on request and be done corresponding change.

Pixel pipe of the present utility model is specially adapted to make the picture and text and the image display screen of jumbotron.For adopting the CFL pixel pipe to surpass 200 square metres especially big screen, will have the better ratio of performance to price.

Claims

1, a kind of colored cold cathode pixel pipe comprises red, green, blue three primary light source and driving circuit, and it is characterized in that: described three primary light source is a cold-cathode tube; Each described cold-cathode tube is loaded on the assigned position in the reflecting surface respectively; And on the exiting surface of each described cold-cathode tube, be respectively equipped with the softbox of respective color, be encapsulated in the insulation shell together with described driving circuit and constitute.

2, colored cold cathode pixel pipe according to claim 1 is characterized in that: described reflecting surface is the cylindricality reflecting surface that is made of plastics.

3, colored cold cathode pixel pipe according to claim 1 is characterized in that: described cold cathode fluorescent lamp is 22 " V " form phase series connection structure.

4, colored cold cathode pixel pipe according to claim 1 is characterized in that: also have the colour filter film on the described softbox.

5, according to claim 1,2,3 and 4 each described colored cold cathode pixel pipes, it is characterized in that: be provided with temperature controller in the described insulation shell.