JPH05290767A - Luminescent color control device for light emitter for flat display - Google Patents

Abstract

PURPOSE:To provide the luminescent color control device of an emitter for flat display, which controls the luminescent color thereof, appropriate for a flat display. CONSTITUTION:A luminescent color control device consists of an RGB emitter 3, which is formed so that a fluorescent body emits the light in a desired color with the electron travelling between an emitter electrode 2 and an anode electrode 12, and deflecting electrodes 8, 9, 10, which are provided between a grid electrode 7 and the RGB emitter 3 and which deflect an orbit of the electron drawn by the grid electrode 7 so that the desired color is emitted. Voltage is applied to each deflecting electrode 8, 9, 10 so that a rotating electric field is formed. An emitter 1 emits the desired color light by adjusting this voltage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting color control device for a flat display light emitting body, which is suitable for a flat display which has recently been attracting attention and which controls the light emitting color thereof.

[0002]

2. Description of the Related Art Recently, with the spread of laptop computers, word processors and the like, and with the demand for space saving in general houses and the like, there has been a sharp increase in the demand for development of flat type displays. In response to this demand, various developments are being carried out in the industrial world.

As an example of this development, a technique for producing a micro vacuum triode by using a semiconductor manufacturing technique can be exemplified. As a publication disclosing this technique, Japanese Unexamined Patent Publication No.
No. 225725. In this technique, the productivity and reliability are improved by forming a specially shaped emitter.

[0004]

However, most of such conventional micro vacuum tubes have been technically developed for the purpose of enabling high frequency operation.
In response to the above demands, it seems that few have been technically developed for the purpose of using the flat display instead of the conventional display. In the present invention, in the light emitter for a flat display using the electron gun of the micro vacuum triode in place of the conventional CRT,
An object of the present invention is to provide a light emitting color control device for a flat display light emitting body, which controls the light emitting color of the light emitting body.

[0005]

The present invention for achieving the above object provides a substantially conical emitter electrode formed on a substrate, an anode electrode for trapping electrons emitted from the emitter electrode, and the emitter. An RGB light emitter provided between the electrode and the anode electrode, configured so that the phosphor emits light by electrons traveling between the two electrodes and independently emits R, G, B colors; An electron extracted between the grid electrode provided between the emitter electrode and the anode electrode, the grid electrode arranged between the emitter electrode and the anode electrode, and the grid electrode and the RGB light emitter A flat display that controls the emission color of a flat display light-emitting body that is composed of a plurality of deflection electrodes that deflect the orbits of the display so that any color is emitted. A light emission color control device for a play light emitter, comprising: a deflection voltage applying means for applying a deflection voltage to each of the plurality of deflection electrodes; and a deflection voltage applying means for applying the deflection voltage based on image data input. And a control unit for instructing a voltage to be applied to each of the plurality of deflection electrodes.

[0006]

In the present invention having the above-described structure, the flat display light-emitting body having the above structure constitutes one pixel of the display, and the voltage applied to the deflection electrode in this one pixel is RG by adjusting
The three primary colors of B and other intermediate colors can be faithfully emitted. Therefore, by forming one pixel very finely, it is possible to create a flat display with very high saturation. Further, unlike the conventional CRT, the scan operation for image formation is not required, so that it is possible to completely remove the flickering of the screen, and it is possible to provide an image similar to a photograph.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of a light emitter for a flat display which is a control target of the device of the present invention.
This display light emitter 1 is configured as shown in FIG.

A cone-shaped emitter electrode 2 is formed on the bottom side of the substrate. And this emitter electrode 2
The RGB light-emitting body 3 is arranged on the upper side opposite to. Although the structure of the light-emitting body 3 will be described later, three-divided R, G, and B filters 4, 5 and 6 having a phosphor coated on the emitter electrode side are evenly arranged in a region corresponding to one pixel. Therefore, each of these colors is configured to emit light by the electrons from the emitter electrode 2. An anode electrode 12 that captures electrons from the emitter electrode 2 is formed on one side of the light emitting body 3. The RGB light emitter 3 is shown in a floating state, but this is for the purpose of making the structure of the light emitter 3 easier to understand, and the actual structure is not so.

Between the emitter electrode 2 and the RGB light emitter 3, a grid electrode 7 divided into two and deflection electrodes 8, 9 and 10 divided into three are respectively formed as a laminated structure. The grid electrode 7 is an electrode that acts so as to emit electrons from the emitter electrode 2 due to the potential difference from the emitter electrode 2. Further, the deflection electrode is an electrode for guiding the electrons emitted from the emitter electrode 2 to the filter of the RGB light emitter 3 at a desired position and causing the light emitter 3 to emit light in a desired color. Therefore, this electrode has a three-part structure in order to guide the electrons to the filter at an arbitrary position. The deflection of the electron orbit is performed by controlling the potential applied to each of the three divided electrodes. still,
In this embodiment, the grid electrode 7 is divided into two, but the grid electrode 7 is not limited to this and may be, for example, multi-divided or not divided at all. Furthermore, the deflection electrode needs to be divided into at least three, but if it is necessary to control the electron orbit very precisely, then
It may be divided into multiple divisions.

A- in FIG. 1 of the RGB light emitter 3 described above.
The cross section A has a structure as shown in FIG. That is,
A transparent electrode to be the anode electrode 12 is formed on one side of the glass substrate 30, and RGB filters are formed below the electrode 12, that is, on the emitter electrode 2 side. In this figure, G filter 6 and B filter 5
It is shown. A phosphor 31 that emits light by electrons from the emitter electrode 2 is coated on the lower side of this filter. Further, an aluminum electrode 32 for wiring the transparent electrode is formed below the anode electrode 12.

FIG. 3 is a block diagram of a light emission control device for a flat display light emitter according to the present invention. In the figure, a first deflection electrode 8, a second deflection electrode 9, a third deflection electrode 1
0 corresponds to the deflection electrode shown in FIG. 1, respectively. A voltage is independently applied to each of these deflection electrodes by the deflection voltage generator 2. In this embodiment, a voltage is applied to each deflection electrode in such a form that a rotating electric field is always formed from the deflection voltage generating section 20. For example, first, on the first deflection electrode 8,
Next, the deflection electrode to which the voltage is sequentially applied is moved to the second deflection electrode 9 and finally to the deflection electrode 10. As a result, the electrons passing through the deflection electrode are given a rotational orbit.

The image data is input to the CPU 21. C
The PU 21 calculates a command signal to be output to the deflection voltage generator 20 based on the input image data. This calculation is performed based on the data stored in the storage unit 22. In the deflection voltage generator 20, a rotating electric field that constantly rotates in a predetermined cycle as described above is formed, but the command signal based on the input image data output from the CPU 21 is superimposed on the signal of the rotating electric field. It is like this. The electron trajectories are formed as shown in FIG. 4 by the present apparatus which operates as described above.

For example, when the input image data is the data for causing the light emitting body 1 to emit white light, C
The PU 21 calculates the voltage to be output by the deflection voltage generator 20 based on this data and the data stored in the memory 22. The result of this calculation is the deflection voltage generator 2
0 is output as a command signal. In the case of emitting white light, the same voltage (0 V) is applied to each deflection electrode by applying a rotating electric field. As a result, RG
The electron orbit viewed from the upper side of the B filter 3 is an orbit as shown in FIG. Therefore, R, G, and B emit light at a very high speed, and white light is output. On the other hand, when image data for emitting a greenish color is input, the voltage applied to each deflection electrode is different, and the voltage is applied only to the second deflection electrode 9. As a result, the electron orbit becomes biased by the G filter as shown in FIG. 4 (B), and the green emphasized color is emitted. Further, in the case of emitting yellow light, the second deflecting electrode 9 and the third deflecting electrode 10
A voltage is applied to both electrodes. As a result, the electron orbit becomes as shown in FIG. 4C, and the light emitting body 1 emits yellow light. Incidentally, the radii of the respective electron trajectories at the same time are different, but this is because the voltage values applied to the respective deflection electrodes are different. As described above, by optimally controlling the deflection electrode to which the voltage is applied and the value of the applied voltage, it becomes possible to output various colors from one light emitting body.

As shown in FIG. 5, a flat display can be realized by arranging the light emitting bodies 1 which are constructed and controlled as described above and are densely arranged vertically and horizontally. In this case, it goes without saying that color control is performed for each light-emitting body that constitutes each pixel.

As described above, in the present embodiment, the voltage for generating the rotating electric field is applied to the deflection electrode by applying the signal for generating the color, and the light is emitted from the light emitter while rotating the electrons. Although the desired color is emitted, the present invention is not limited to this, and electrons directed from the emitter electrode 2 to the anode electrode 12 may be focused by the deflection electrode to emit light at a desired position of the filter 3.

[0016]

As described above, according to the present invention, the voltage applied to each deflection electrode is adjusted to adjust the electron orbit, so that one flat display light-emitting body emits any color. As a result, it is possible to create a flat display with extremely high saturation. In addition, since this light emitter does not require scanning, it is possible to provide an image close to a photograph.

[Brief description of drawings]

FIG. 1 is a structural diagram of a light emitter for a flat display driven by the device of the present invention.

FIG. 2 is a diagram showing details of a filter portion of the light emitting body shown in FIG.

FIG. 3 is a block diagram of a control device for driving the light emitter shown in FIG.

FIG. 4 is a diagram showing an example of electron trajectories controlled by the apparatus shown in FIG.

5 is an explanatory view of a flat display using the light emitting body shown in FIG.

[Description of Reference Signs] 1 ... Light emitter for display 2 ... Emitter electrode 3 ... RGB light emitter 4 ... R filter 5 ... G filter 6 ... B filter 7 ... Grid electrode 8, 9, 10 ... Deflection electrode 12 ... Anode electrode 20 ... Deflection voltage generator 21 ... CPU

Claims (1)

[Claims] 1. A substantially conical emitter electrode formed on a substrate, an anode electrode for trapping electrons emitted from the emitter electrode, and provided between the emitter electrode and the anode electrode. The fluorescent substance is emitted by electrons traveling in the direction of R, G, and B, and the R, G, and B colors are independently emitted, and the R, G, and B emitters are provided between the emitter electrode and the anode electrode. A grid electrode disposed between the electrode and the anode electrode, and a plurality of grid electrodes that are provided between the grid electrode and the RGB light emitter and deflect the orbits of the electrons extracted by the grid electrode so that any color is emitted. And a deflection electrode for controlling the emission color of the flat display light-emitting body. Deflection voltage applying means for applying a deflection voltage to each of the deflection electrodes, and the deflection voltage applying means commands the voltage to be applied to each of the plurality of deflection electrodes based on the input image data. A light emission color control device for a light emitter for a flat display, comprising: a control unit.