An optical filter is provided on the output side of light from plural kinds of cells that output light with colors different from one another. In the optical filter, the penetrable rate of at least a portion of the wavelength band of light output from the cell with the color having highest luminescent intensity is set lower than that of the wavelength band of other kinds of cells. Consequently, the reflectance rate of outer light incident to a display can be reduced. Particularly, in a room environment using artificial lighting, the reflectance rate of outer light can be reduced in the wavelength band of light with relatively high luminescent intensity. Resultingly, bright room contrast can be improved by suppressing the reflection of outer light. Since the penetrable rate of the color with the highest luminescent intensity is reduced, reduction in brightness of the display can be kept to a minimum.
1. A display device comprising:
a red cell;
a green cell; and
a blue cell, wherein each cell is arranged in a matrix in order to display an image and which output red light, green light, and blue light, respectively; and
an optical filter provided uniformly on each of said cells and on the output side of light from said cells, wherein the penetrable rate of at least a portion of a wavelength band of light output from the green cell having the highest luminescent intensity is lower than the penetrable rates of wavelength bands of said red cell and said blue cell, wherein:
in the green cell, the luminescent intensity is further increased in order to compensate for the amount of light that will run short when the penetrable rate of said optical filter is reduced, and
the penetrable rate of the wavelength band of light emitted from said green cell in said optical filter is equal to or greater than 0.66 of the penetrable rate of the wavelength band of light emitted from said red cell and less than 1.
2. A display device comprising:
a red cell;
a green cell; and
a blue cell, wherein each cell is arranged in a matrix in order to display an image and which output red light, green light, and blue light, respectively; and
an optical filter provided uniformly on each of said cells and on the output side of light from said cells, wherein the penetrable rate of at least a portion of a wavelength band of light output from the green cell having the highest luminescent intensity is lower than the penetrable rates of wavelength bands of said red cell and said blue cell, wherein:
in the green cell, the luminescent intensity is further increased in order to compensate for the amount of light that will run short when the penetrable rate of said optical filter is reduced, the cell with the lowest luminescent intensity is said blue cell,
said optical filter has a characteristic that the penetrable rate of light emitted from said blue cell is higher than that of light emitted from said red cell,
said blue cell has a narrower cell width compared to said red cell in order to reduce the amount of light that will be excessive when the penetrable rate of said optical filter is increased, and
the penetrable rate of the wavelength band of light emitted from said green cell in said optical filter is equal to or greater than 0.66 of the penetrable rate of the wavelength band of light emitted from said red cell and less than 1.