Patent ID: 7192140

Claim:
A projector comprising: a light source including: a red light emitting unit, the red light emitting unit including a plurality of red light emitting diodes that emit red light, and a pair of tone adjusting light emitting diodes that are controlled and lit separately from the red light emitting diodes and increase an amount of the red light; a green light emitting unit, the green light emitting unit including a plurality of green light emitting diodes that emit green light, and another pair of tone adjusting light emitting diodes that are controlled and lit separately from the green light emitting diodes and increase an amount of the green light; a blue light emitting unit, the blue light emitting unit including a plurality of blue light emitting diodes that emit blue light and a single tone adjustting light emitting diode that is controlled and lit separately from the blue light emitting diodes and increases an amount of the blue light; and a light modulator that modulates the red light, the green light, and the blue light emitted from the light source, wherein: the projector is adapted to project and display an image on a screen by projecting the light modulated by the light modulator onto the screen; and the light source is constructed such that the red light emitting unit includes a first quantity of red light emitting diodes; the green light emitting unit includes a second quantity of green light emitting diodes; the blue light emitting unit includes a third quantity of blue light emitting diodes, and the first and second quantities are equal, and the third quantity is less than the first and second quantities so that a ratio between respective amounts of red light, green light, and blue light incident on the light modulator with all of the light emitting diodes lit satisfies a predetermined condition.