Lighting device, backlight device, and liquid crystal display device

Abstract

The present invention is made to realize a lighting device capable of emitting uniform surface light having high luminance and a wide color reproduction range, and a backlight device a liquid crystal display device including the lighting device. Such a lighting device of the present invention includes: a GB lamp for emitting blue and green light; an RLED for emitting red light; and a light emitting section for irradiating, to outside, the light emitted from each of the GB lamp and the RLED. The light emitting section has an upper surface serving as a light emitting surface, and the GB lamp and the RLED are provided under the light emitting section. Further, the RLED is so provided as to emit the light in a direction that is not perpendicular to the light emitting surface.

Description

technical field [0001] The invention relates to an illuminating device and a liquid crystal display device with the illuminating device. More specifically, it relates to a lighting device using discharge tubes such as cold cathode tubes and LEDs (Light Emitting Diodes), and a liquid crystal display device including the lighting device. Background technique [0002] Conventionally, discharge tubes such as cold cathode tubes or LEDs (Light Emitting Diodes) have been mainly used as light sources for backlights of liquid crystal display devices. In the cold cathode tube, the excited mercury emits ultraviolet rays, and the ultraviolet rays come into contact with the phosphor coated on the inner wall of the glass tube, thereby emitting visible light. Usually, as this phosphor, by mixing R (red), G (green), and B (blue) colors, the emitted visible light becomes white. [0003] On the other hand, in an LED, holes and electrons generated by applying a voltage in the forward directi...

AI Technical Summary

Problems solved by technology

Therefore, since the emitting direction of the light of the LED becomes the direction of the liquid crystal panel, and the combination of the fluorescent tube as the linear light source and the LED as the point light source, it is difficult to make the light transmitted through the liquid crystal panel uniform over the entire surface.

That is, there is a problem that the light emitted from the LED and the light emitted from the fluorescent tube do not intersect uniformly over the entire surface, and it is difficult to emit light that makes the light transmitted through the liquid crystal panel uniform over the entire surface.

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