JP2000123785A - Luminescence device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the distance from an electron generation point to a luminescence point and to allow luminescence on a face by providing a medium generating electrons when receiving the light of a photoelectric material, a medium generating light when receiving the electrons of a fluorescent material, and a means feeding energy to electrons. SOLUTION: A reflecting face 40 of light and the face of a fluorescent material 30 are overlappingly arranged, and a voltage is applied between the fluorescent material 30 and a photoelectric material 20. When light hits the photoelectric material 20, for example, electrons are generated on the photoelectric material 20, electrons are accelerated toward the fluorescent material 30 because the voltage is applied, and light is generated when the electrons hit the fluorescent material 30. Light is sent toward the photoelectric material 20 after hitting the reflecting face 40. Part of the light generated by the fluorescent material 30 is sent to the photoelectric material 20 without hitting the reflecting face 40. If the quantity of this light is sufficient, no reflecting face 40 is required, and part of the light is extracted to the outside. Part of the remaining light is sent to the photoelectric material 20 to generate electrons again, the electrons are accelerated to hit the fluorescent material 30, thus the luminescence of the whole device can be continued.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION

The present invention relates to a light emitting device used for lighting, screen display, and the like.

[Prior art]

Devices that emit light using electrons include a cathode ray tube, a fluorescent lamp, and electroluminescence.

[Problems to be solved by the invention]

[0003] A cathode ray tube obtains a light emitting surface by shaking electrons emitted from an electron gun. Further, in order to obtain a wide light emitting surface using a fluorescent lamp, a tube of the fluorescent lamp is bent or a plurality of fluorescent lamps are used. However, a cathode ray tube requires a space for emitting electrons. Further, in the case of a fluorescent lamp, there is a difference in brightness between a part with a fluorescent lamp and a part without a fluorescent lamp. The present invention makes it possible to make a surface emit light by shortening the distance from an electron generation point to a light emission point.

[Means for Solving the Problems]

[0004] The present invention comprises a medium such as a photoelectric substance that generates electrons by receiving light, a medium such as a fluorescent substance that generates light by receiving electrons, and means for supplying energy to the electrons. It is.

[0005] The direction in which electrons and light travel is controlled to exchange electrons and light between the photoelectric material and the fluorescent material. During this time, energy is supplied to the electrons. Even if energy is taken out of the device as light, if the supplied energy is sufficient,
The device can continue to emit light.

BEST MODE FOR CARRYING OUT THE INVENTION

The photoelectric substance and the fluorescent substance are distributed, for example, in a planar shape. Apply a voltage between the photoelectric material and the fluorescent material,
Controls the direction in which electrons travel. Also, using a reflector, etc.
Controls the direction in which light travels. The voltage is used to supply energy to the electrons.

For example, as shown in FIG. 1, a light reflecting surface, a fluorescent material surface, and a fluorescent material surface are arranged so as to overlap with each other. Further, a voltage is applied between the fluorescent substance and the photoelectric substance. For example, assume that light first strikes a photoelectric material. Electrons are generated in the photoelectric material. The electrons are accelerated toward the fluorescent substance because of the voltage. Light is generated when the accelerated electrons hit the fluorescent material. The light hits the reflective surface, etc., and travels toward the photoelectric material. Some of the light generated by the fluorescent material goes to the photoelectric material without hitting the reflecting surface. If this amount of light is sufficient, there is no need for a reflective surface. Part of the light is extracted outside. A part of the remaining light is applied to the photoelectric material to generate electrons again. The electrons are accelerated and hit the phosphor again. In this way, light emission can be continued in the entire device. At this time, the intensity of light can be adjusted by adjusting the voltage. In addition, light intensity and color can be adjusted using liquid crystal. Using liquid crystal,
It is possible to block the light going to the photoelectric material or the light going to the outside. Further, the color and intensity of light can be adjusted by changing the type of fluorescent substance.

【Example】

As a light emitting device according to the present invention, there is a lighting device in which a light emitting portion is a flat surface. There is also an illumination device in which a light emitting unit is a curved surface. Further, one light emitting surface can be configured by combining several light emitting surfaces.
For example, a light emitting device of a required size can be configured by combining a plurality of light emitting devices of a standardized size. At this time, by making it possible to supply power from a device adjacent to the device, it is not necessary to perform wiring for each device, and it is possible to easily change the surface shape of the entire device. A light emitting device in which the intensity of light or the like can be adjusted is defined as a light emitting element. For example, when the elements are arranged and the voltage is adjusted in rows and columns, a screen display becomes possible due to an afterimage phenomenon. Other screen display devices that can be configured according to the present invention include a television display, a personal computer display,
There are backlights for LCD screens of notebook computers and display panels for electronic devices.

According to the present invention, a light emitting device which emits light on a surface and has a small overall thickness can be constructed.

[Brief description of the drawings]

FIG. 1 is an arrangement diagram of a photoelectric material, a fluorescent material, a reflection surface, and electrodes.

[Brief description of reference numerals]

 10 electrodes 20 photoelectric substance 30 fluorescent substance 40 reflection surface 50 electrodes

Claims (3)

[Claims] 1. A medium that receives light such as a photoelectric substance to generate electrons, a medium such as a fluorescent substance that generates light by receiving electrons,
A light emitting device comprising: means for supplying energy to electrons. 2. A light emitting device according to claim 1, wherein the means for supplying energy to the electrons uses a potential difference, and the means for accelerating the electrons generated in the photoelectric material toward the fluorescent material. 3. The light emitting device according to claim 1, wherein the device is a lighting device or a screen device.