IMAGE DISPLAY APPARATUS

Abstract

An image display apparatus has an electron source on which a plurality of electron-emitting devices are arranged, an irradiated member which is arranged so as to be opposed to the electron source to form luminescent spots on different locations, respectively, in response to respective electron-emitting devices due to irradiation of electrons emitted from the electron-emitting devices, a deflector for deflecting trajectory of the electron emitted from the electron-emitting devices, and a correction circuit for correcting the light quantity of the luminescent spot. The correction circuit corrects a visual unevenness in luminance by making a correction in response to the interval between two luminescent spots and the interval between other luminescent spots adjacent to the two luminescent spots so as to improve a quality of an image.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic perspective view of an image display apparatus according to an example of the present invention;

FIG. 2 is a plan view showing part of the luminescent spot array shown in FIG. 1;

FIG. 3 is a schematic perspective view of an image display apparatus according to a first example of the present invention;

FIG. 4 is a partial plan view of an electron source provided in an image display apparatus;

FIG. 5 is a schematic perspective view of a spacer which is disposed in the image display apparatus according to the first example of the present invention;

FIG. 6 shows light quantity data of luminescent spots according to the first example of the present invention;

FIG. 7 shows profile data of luminescent spots according to the first example of the present invention;

FIG. 8 is a diagram showing arrangement of electron-emitting regions and luminescent spots in relation to each other according to the first example of the present invention;

FIG. 9 is a block diagram of the image display apparatus including a drive circuit according to the first example of the present invention;

FIG. 10 is a diagram showing arrangement of electron-emitting regions and luminescent spots in relation to each other according to a third example of the present invention;

FIG. 11 is a schematic perspective view of an image display apparatus according to a fifth example of the present invention; and

FIG. 12 is a plan view showing part of the luminescent spot array according to the example of the present invention.

Claims

1. An image display apparatus comprising: a plurality of electron-emitting devices;an irradiated member which is arranged so as to be opposed to the plurality of electron-emitting devices to form luminescent spots on different locations, respectively, in response to respective electron-emitting devices due to irradiation of electrons emitted from the electron-emitting devices;a plurality of deflectors for deflecting trajectories of the electrons emitted from the electron-emitting devices; anda correction circuit for correcting the light quantity of the luminescent spot;wherein the plurality of deflectors includes at least first and second deflectors which are located at a distance where three or more electron-emitting devices can be arranged in a first direction;among four luminescent spots A2, A1, B1, and B2 formed adjacent in sequence, respectively, by four electron-emitting devices arranged in the first direction, the first deflector is located between the luminescent spots A1 and B1;the interval between the luminescent spots A1 and B1 in the first direction is narrower than the average value of the intervals in the first direction of the adjacent luminescent spots between the first and second deflectors and the interval between the luminescent spots A2 and A1 in the first direction is narrower than the interval between the luminescent spots B1 and B2 in the first direction; andthe correction circuit makes a correction so that the light quantities of the luminescent spots A1 and B1 are relatively smaller than the light quantities of the luminescent spots A2 and B2 and the light quantity of the luminescent spot A1 is relatively smaller than the light quantity of the luminescent spot B1 when an input signal is a signal to require the same light quantities from the luminescent spots A2, A1, B1, and B2.

2. The image display apparatus according to claim 1, wherein the correction circuit makes a correction so that the light quantity of the luminescent spot A2 is relatively smaller than the light quantity of the luminescent spot B2 when an input signal is a signal to require the same light quantities from the luminescent spots A2, A1, B1, and B2 and when the correction circuit makes a correction so that the light quantities of the luminescent spots A1 and B1 are relatively smaller than the light quantities of the luminescent spots A2 and B2 and the light quantity of the luminescent spot A1 is relatively smaller than the light quantity of the luminescent spot B1.

3. An image display apparatus comprising: a plurality of electron-emitting devices;an irradiated member which is arranged so as to be opposed to the plurality of electron-emitting devices to form luminescent spots on different locations, respectively, in response to respective electron-emitting devices due to irradiation of electrons emitted from the electron-emitting devices;a plurality of deflectors for deflecting trajectories of the electrons emitted from the electron-emitting devices; anda correction circuit for correcting the light quantity of the luminescent spot;wherein the plurality of deflectors includes at least first and second deflectors which are located at a distance where three or more electron-emitting devices can be arranged in a first direction;among four luminescent spots A2, A1, B1, and B2 formed adjacent in sequence, respectively, by four electron-emitting devices arranged in the first direction, the first deflector is located between the luminescent spots A1 and B1;the interval between the luminescent spots A1 and B1 in the first direction is broader than the average value of the intervals in the first direction of the adjacent luminescent spots between the first and second deflectors and the interval between the luminescent spots A2 and A1 in the first direction is broader than the interval between the luminescent spots B1 and B2 in the first direction; andthe correction circuit makes a correction so that the light quantities of the luminescent spots A1 and B1 are relatively larger than the light quantities of the luminescent spots A2 and B2 and the light quantity of the luminescent spot A1 is relatively larger than the light quantity of the luminescent spot B1 when an input signal is a signal to require the same light quantities from the luminescent spots A2, A1, B1, and B2.

4. The image display apparatus according to claim 3, wherein the correction circuit makes a correction so that the light quantity of the luminescent spot A2 is relatively larger than the light quantity of the luminescent spot B2 when an input signal is a signal to require the same light quantities from the luminescent spots A2, A1, B1, and B2 and when the correction circuit makes a correction so that the light quantities of the luminescent spots A1 and B1 are relatively larger than the light quantities of the luminescent spots A2 and B2 and the light quantity of the luminescent spot A1 is relatively larger than the light quantity of the luminescent spot B1.