JPH095736A - Display device - Google Patents

Abstract

PURPOSE: To increase the latitude for selection of the light source and to increase the efficiency of light emission. CONSTITUTION: UV rays (A) are supplied from a UV ray generator 4 to a light-emitting member 3 on which a fluorescent material is applied so as to generate visible rays (B) of a specified spectrum. The visible rays (B) are made to enter pixels 5 of a liquid crystal element 2. By controlling the transmission of visible rays in each pixel, the image information is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device provided with a light emitting source and displaying an image by controlling the light amount of the light emitting source for each pixel constituting the image.

[0002]

2. Description of the Related Art Conventionally, a display device of this type is shown in FIG.
As shown in FIG. 3, the backlight 100 is a light emitting source, a color filter 101, and a liquid crystal shutter 102.

To display an image, the visible light emitted from the backlight 100 is changed to the color filter 1.
The spectrum of light was adjusted through 01, and light was adjusted by the liquid crystal shutter 102 to synthesize a color image.

[0004]

By the way, in the above-described conventional display device, since the backlight 100 as a light emitting source is limited to the one capable of emitting visible light, the usable light emitting source is limited.

Further, in the conventional display device, in the case of displaying a plurality of colors, visible light that once emitted white light from the backlight 100 is further transmitted to the color filter 101, and a spectrum component unnecessary for the pixel is displayed. However, since the light emission amount on the image display surface is lower than the light emission amount of the backlight 100, it is difficult to obtain high efficiency.

[0006] Therefore, an object of the present invention is to provide a display device capable of widening the degree of freedom of selection of a light emitting source and improving the efficiency of light emission.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is a transmitted light amount control means for controlling the transmitted light amount for each pixel for forming an image, and the transmitted light amount control. For each pixel of the means, there are provided a light emitting means for converting energy supplied from the outside into visible light having a specified spectrum to emit light, and an energy supplying means for supplying energy for causing the light emitting means to emit light. It is equipped with the feature.

[0008]

According to the present invention, an image can be displayed by causing the light emitting means to emit visible light with the energy supplied from the energy supplying means and capable of causing the light emitting means to emit light other than visible light.

Further, since the light emitting means is capable of emitting light of a plurality of types of spectrum, the energy supplied from the energy supply means causes each pixel to emit visible light of a plurality of types of specified spectra.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view showing a display device according to the first embodiment of the present invention. The display device 1 includes a liquid crystal element 2 that functions as a transmitted light amount control unit, a light emitting member 3 that functions as a light emitting unit, and an ultraviolet ray generation device 4 that is an energy supply unit.

The liquid crystal element 2 has a function of controlling the amount of transmitted light for each pixel 5 for forming an image, and the amount of transmitted light is controlled by an electro-optical effect due to application of a voltage from the outside.

The light emitting member 3 is provided on the back side of the liquid crystal element 2 for each pixel 6 for forming an image, and an ultraviolet ray generating device 4 such as an ultraviolet fluorescent lamp provided on the back side of the light emitting member 3. A fluorescent material is applied so as to emit visible light B having a specified spectrum by ultraviolet rays A supplied from In addition, each pixel 5 of the liquid crystal display element 2 and the light emitting member 3
Each pixel 6 of is formed at a corresponding position.

Next, the operation of this embodiment will be described.

When the light emitting member 3 of each pixel 6 is irradiated with the ultraviolet light A generated by the ultraviolet light generator 4, each light emitting member 3 is
The irradiated ultraviolet ray A is the visible ray B of the specified spectrum.
Convert to

Image information is displayed by making visible light B of a specified spectrum emitted by each light emitting member 3 incident on each pixel 5 of the liquid crystal element 2 and controlling the amount of transmitted light.

As described above, in this embodiment, since the visible light B incident on each pixel 5 of the liquid crystal element 2 can be generated without using a light emitting source that generates the visible light, The degree of freedom in selection can be widened.

FIG. 2 is a schematic diagram showing a display device according to the second embodiment of the present invention, and FIG. 3 is a diagram showing its configuration.

In this embodiment, the light emitting member 3 which is the light emitting means.
a has a monochromatic light emission function consisting of red (R), green (G), and blue (B) pixels 6, and is capable of emitting light of a plurality of types of spectra. In this embodiment, the light emitting member 3a is composed of vertical stripes RGB.

The designated spectrum of visible light emitted from the light emitting member 3a is of N (N ≧ 2) types and M
This is configured to reproduce (M ≧ N) types of colors. The other structure is the same as that of the first embodiment.

In this embodiment, when the ultraviolet ray A generated by the ultraviolet ray generator 4 is incident on the light emitting member 3a having a color filter function, it is converted into visible light of a specified emission color and the liquid crystal element. By controlling the amount of transmitted light for each pixel 5 at 2, image information composed of a plurality of colors is displayed.

As described above, the light emitting member 3a is capable of emitting a plurality of kinds of spectra by the ultraviolet rays A, so that the ultraviolet rays A generated by the ultraviolet ray generator 4 can efficiently emit only the necessary spectrum for each pixel 6. It can emit light.

In each of the above-mentioned embodiments, the energy supply means uses an ultraviolet ray generating device for generating ultraviolet rays, and the light emitting means uses a light emitting member coated with a fluorescent material that emits visible light. However, the present invention is not limited to this. Alternatively, an energy supply means for generating electromagnetic energy other than visible light and ultraviolet rays and a light emitting means for emitting visible light with this electromagnetic energy can be used.

Further, in the above-mentioned embodiment, although the vertical stripe RGB is used for the light emitting member, a thin film transistor (TFT) driven color liquid crystal display element (LC) is used.
The RGB triangle arrangement generally used in D) is advantageous in terms of horizontal resolution.

[0025]

As described above, according to the present invention,
Since it is possible to display an image by causing the light emitting means to emit visible light with energy that allows the light emitting means to emit light other than visible light supplied from the energy supply means, a light emitting source that generates visible light is used. It is possible to display without any need, and it is possible to widen the degree of freedom of selection of the light emitting source.

Further, by using as the light emitting means a light emitting member coated with a fluorescent material that emits visible light of a plurality of colors by irradiating the energy supplied from the energy supplying means, a plurality of types of spectrum of the same energy can be obtained. Since light emission is possible, only the spectrum required for each pixel of the light emitting means can be efficiently emitted.

[Brief description of drawings]

FIG. 1 is a schematic view showing a display device according to a first embodiment of the invention.

FIG. 2 is a schematic view showing a display device according to a second embodiment of the invention.

FIG. 3 is a configuration diagram showing a display device according to a second embodiment of the invention.

FIG. 4 is a configuration diagram showing a conventional display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 display device 2 liquid crystal element (transmitted light amount control means) 3, 3a light emitting member (light emitting means) 4 ultraviolet ray generation device (energy supply means) 5, 6 pixels

Claims (6)

[Claims] 1. A transmitted light amount control means for controlling the transmitted light amount for each pixel forming an image, and a visible spectrum of a spectrum in which energy supplied from the outside is designated corresponding to each pixel of the transmitted light amount control means. A display device comprising: a light emitting unit that converts light into a light beam and emits light; 2. The designated spectrum of visible light emitted from the light emitting means is of N (N ≧ 2) types and M (M ≧ 2).
The display device according to claim 1, which reproduces N) types of colors. 3. The display device according to claim 1, wherein the transmitted light amount control means is a liquid crystal element. 4. The display device according to claim 1, wherein the energy is ultraviolet light. 5. The display device according to claim 1, wherein the light emitting means is a light emitting member coated with a fluorescent material that emits visible light. 6. The display device according to claim 1, wherein the light emitting means is a light emitting member coated with a fluorescent material that emits visible light of a plurality of colors.