Light-emitting diode device and backlight apparatus and liquid-crystal display apparatus using light-emitting diode device

摘要

A light-emitting diode device has a lens (3) covered around a light-emitting diode chip (1) and a processed portion (13) for adjusting light going from the light-emitting diode chip (1) along the central axis of the lens (3) is provided at the light-emitting diode chip (1) or the lens (3) or being provided right above the lens (3). The light-emitting diode chip (1) is processed near the central axis by a suitable method such as etching. Alternatively, a diffusion material containing low refractive index material portion or an angle selective film is provided on the lens (3). A light-emitting diode device is able to adjust a quantity of light emitted from the LED chip along the central axis of the lens so that light can be radiated with a desired angle distribution. A backlight apparatus and a liquid-crystal display apparatus are able to suppress ununiformity of brightness and ununiformity of color by using the above-mentioned light-emitting diode device.