Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J31/00—Cathode ray tubes; Electron beam tubes
  • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
  • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
  • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J63/00—Cathode-ray or electron-stream lamps
  • H01J63/06—Lamps with luminescent screen excited by the ray or stream

Definitions

• the present invention particularly relates to a cathode ray tube for a light source, which constitutes a pixel of a huge display device.
• a huge display device for displaying an advertisement image on an electronic display board of a baseball stadium, a rooftop or a wall of a building, and the like a large number of light bulbs are arranged.
• the image is formed by selectively blinking the image.
• the current and the emission intensity are not linear, and depend on the applied current.
• the cathode ray was used as the light source of the display device.
• the efficiency of converting light energy into light energy is generally
• the cathode ray tube is about 100 0
• the phosphor may be red, green, blue, etc.
• the display of moving images can be performed without any obstacles.
• the emission luminance is changed faithfully with respect to the input electrical signal.
• the heater is turned off, as compared with the spherical type.
• the general cathode ray tube is the color of the phosphor.
• the emission color of the fluorescent screen of the cathode ray tube becomes white.
• this type of display device is one of a kind.
• Phosphor should have a body color corresponding to each emission color.
• a pigment phosphor coated with a pigment on each phosphor particle may be used, or a fluorescent glass or a fluorescent glass may be used.
• the color under daylight is sharpened and the contrast is increased.
• This invention is a light source for a huge display device.
• At least the face must be at specific wavelengths in the visible range.
• FIG. 1 shows an embodiment of a light source cathode ray tube according to the present invention.
• FIG. 2 is a diagram showing emission spectrum characteristics of the phosphor
• FIG. 3 is a diagram showing spectral transmittance characteristics of the face glass in FIG.
• FIG. 4 shows a spectral transmittance of a glass substrate according to another embodiment of the present invention.
• FIG. 4 is a diagram showing excess ratio characteristics.
• FIG. 1 shows a cathode ray tube for a light source according to the present invention.
• This vacuum envelope (1) is a cylindrical vacuum envelope.
• This vacuum envelope (1) has a fluorescent screen ( 2 ) on one end.
• An electron gun ( 4 ) which has a face glass ( 3 ) attached thereto and generates a flood electron beam (described later) at the other end, and an electron gun ( The terminal that applies the required voltage to Tokyo
• the heater, shade and grid that make up the gun ( 4 ) are one. Also, ( 9 ) is a hole provided in the center of the grid ( 8 ),
• ⁇ is a flood electron beam emitted from the electron gun ( 4 ).
• Lot 4 ⁇ ⁇ . ⁇ , A negative voltage is applied to the cathode ( 7 ) to the grid ( 8 ), a predetermined current is applied to the heater ( 6 ), and the cathode ( 7 ) is heated and When the voltage of the pad ( 8 ) approaches the potential of the cathode (7), an electron beam ⁇ is emitted from the cathode (7) toward the phosphor screen (the electron beam ⁇ ).
• Li Tsu diameter de (8) central to providing et a hole in the (9), I by the conditions such as the interval and an anode voltage of grayed and Li Tsu de (8) and the cathode (7), '
• the fluorescent screen ( 2 ) is illuminated as a non-focused beam with a predetermined spread &, causing the fluorescent screen to emit a color corresponding to the phosphor.
• the vacuum envelope including the face glass (3) or the face glass of the cathode ray tube is Neodymium
• Nd 2 0 3 in Tsu by the and the child be configured with gas La scan you containing Pras ⁇ dymium oxide (Pr 2 0 3) , and so on rare earth oxides, were example, if, Nd 2 0 3 is 570-585 nm and
• a cathode ray tube for color display light source A typical phosphor is blue.
• Z nS is: Ag, green Gd 2 0 2 S: Tb, red Y 2 0 2 S: E u - Ri Contact been found have use is the one example of these light-emitting scan Bae click preparative Le Figure 2 shows. As you can see in the figure,
• red and red are composed of phosphors exhibiting line spectrum, for example, spectral transmission as shown in Fig. 3
• the body has a specific or near primary color
• the blue phosphor is combined with di d ymi urn g 1 a s s
• the blue light transmittance is slightly inferior and the overall
• the blue glass (this spectral transmittance characteristic is shown in Fig. 4)
• Iron oxide Fe 2 0 3 your good beauty oxide cell Li ⁇ beam (Ce0 2 :) of acid to
• the performance can be further improved.
• the characteristic is as shown by the curve (I) in Fig. 4.
• the effect of sunlight can be reduced without much lowering.
• display devices that are used in direct sunlight can be extremely advantageous both in terms of performance and economics, since they can be expected to have remarkable effects. Become .
• a pigment face reinforced with a body color enhanced by a pigment corresponding to the emission color of each phosphor is used. Therefore, it was confirmed that a more excellent effect was obtained.
• the present invention it is possible to increase the absorption of external light without sacrificing the light-emitting energy of each phosphor, and particularly in daylight. It is possible to obtain good color light and contrast even under the sunlight of the sun, and the glass bulb can be composed of one type or two types of glass. For this reason, there is a very economical advantage to constructing three types of color glass.
• This light can be applied to a huge display device that can obtain a good contrast even under the daylight sunlight.

Landscapes

• Discharge Lamps And Accessories Thereof (AREA)
• Luminescent Compositions (AREA)
• Vessels And Coating Films For Discharge Lamps (AREA)
• Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=26413518

Family Applications (1)

Country Status (3)

Families Citing this family (1)

Citations (1)

Family Cites Families (7)

• 1981
  • 1981-05-29 GB GB8202021A patent/GB2092368B/en not_active Expired
  • 1981-05-29 DE DE19813152042 patent/DE3152042A1/de active Granted
  • 1981-05-29 WO PCT/JP1981/000120 patent/WO1981003581A1/ja not_active Ceased

Patent Citations (1)

Non-Patent Citations (1)

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