Light source apparatus, backlight apparatus, liquid crystal display apparatus, and manufacturing method of backlight apparatus

A light source apparatus used in a backlight apparatus, comprising:

• a light-emitting diode unit including a plurality of light emitting diodes of different colors arranged nonlinearly and closely on a wiring board,
• wherein,
• the plurality of the light-emitting diode units are arranged at predetermined intervals in a predetermined direction on the wiring board,
• each light-emitting diode unit includes one red light-emitting diode, one blue light-emitting diode, one first green light emitting diode having a first chromaticity and a first luminance and one second green light emitting diode having a second chromaticity and a second luminance which are different than the first chromaticity and the first luminance,
• the first and second diodes are configured such that the average chromaticity of the light emitting diode unit is equal to a predetermined value and the average luminance of the light-emitting diode unit is a predetermined value,
• the red light-emitting diode and the blue light-emitting diode of each light-emitting unit are provided on a first line that is nearly parallel to the arrangement direction of the light emitting diode units on the wiring board,
• the first green light-emitting diode and the second green light-emitting diode of each light emitting diode unit are provided on a second line nearly orthogonal to the first line such that respective distances from the first and second green light emitting diodes to the red light-emitting diode and the blue light emitting diode are nearly equal, and
• the light emitting diode units are arranged such that the first green light-emitting diodes and the second green light-emitting diodes are arranged in a zig-zag pattern along the arrangement direction of the light-emitting diode units on the wiring board.

A backlight apparatus, comprising:

• a plurality of light source apparatuses each including a plurality of light-emitting diode units with each light-emitting diode unit including a plurality of light-emitting diodes of different colors nonlinearly and closely placed on a wiring board,
• wherein,
• the plurality of the light-emitting diode units are arranged at predetermined intervals in a first direction on the wiring board,
• the plurality of the light source apparatuses are placed in a matrix on the housing in a first direction and a second direction which is nearly orthogonal to the first direction,
• each light-emitting diode unit includes one red light-emitting diode, one blue light-emitting diode, one first green light emitting diode having a first chromaticity and one second green light emitting diode having a second chromaticity which is different than the first chromaticity
• the first and second diodes are configured such that the average chromaticity of the light emitting diode unit is equal to a predetermined value,
• the red light-emitting diode and the blue light-emitting diode of each light-emitting unit are provided on a first line that is nearly parallel to the first direction of the light emitting diode units on the wiring board,
• the first green light-emitting diode and the second green light-emitting diode of each light emitting diode unit are provided on a second line nearly orthogonal to the first line such that respective distances from the first and second green light emitting diodes to the red light-emitting diode and the blue light emitting diode are nearly equal, and
• the light emitting diode units are arranged such that the first green light-emitting diodes and the second green light-emitting diodes are arranged in a zig-zag pattern along the first direction of the light-emitting diode units on the wiring board.

A backlight apparatus, comprising:

• a plurality of light source apparatuses each including a plurality of light-emitting diode units each light-emitting diode unit including a plurality of light-emitting diodes of different colors nonlinearly and closely placed on a wiring board,
• wherein,
• a plurality of the light source apparatuses are placed in a matrix on the wiring board in the first direction and a second direction nearly orthogonal to the first direction on a predetermined plan;
• each light-emitting diode unit includes one red light-emitting diode, one blue light-emitting diode, one first green light emitting diode having a first chromaticity and a first luminance and one second green light emitting diode having a second chromaticity and a second luminance which are different than the first chromaticity and the first luminance,
• the first and second diodes are configured such that the average chromaticity of the light emitting diode unit is equal to a predetermined value and the average luminance of the light-emitting diode unit is a predetermined value,
• the red light-emitting diode and the blue light-emitting diode of each light-emitting unit are provided on a first line that is nearly parallel to the first direction of the light emitting diode units on the wiring board,
• the first green light-emitting diode and the second green light-emitting diode of each light emitting diode unit are provided on a second line nearly orthogonal to the first line such that respective distances from the first and second green light emitting diodes to the red light-emitting diode and the blue light emitting diode are nearly equal, and
• the light emitting diode units are arranged such that the first green light-emitting diodes and the second green light-emitting diodes are arranged in a zig-zag pattern along the first direction of the light-emitting diode units on the wiring board.

A manufacturing method of a backlight apparatus, comprising the steps of:

• forming a plurality of light-emitting diode units each light-emitting diode unit including a plurality of light-emitting diodes;
• forming a light source apparatus by arranging the plurality of light-emitting diode units nonlinearly and closely in a first direction on a wiring board and
• placing a plurality of the light source apparatuses in a matrix in the first direction and a second direction nearly orthogonal to the first direction on a predetermined plane in a housing,
• wherein,
• each light-emitting diode unit includes one red light-emitting diode, one blue light-emitting diode, one first green light emitting diode having a first chromaticity and one second green light emitting diode having a second chromaticity which is different than the first chromaticity,
• the first and second diodes are configured such that the average chromaticity of the light emitting diode unit is equal to a predetermined value,
• the red light-emitting diode and the blue light-emitting diode of each light-emitting unit are provided on a first line that is nearly parallel to the first direction of the light emitting diode units on the wiring board,
• the first green light-emitting diode and the second green light-emitting diode of each light emitting diode unit are provided on a second line nearly orthogonal to the first line such that respective distances from the first and second green light emitting diodes to the red light-emitting diode and the blue light emitting diode are nearly equal, and
• the light emitting diode units are arranged such that the first green light-emitting diodes and the second green light-emitting diodes are arranged in a zig-zag pattern along the first direction of the light-emitting diode units on the wiring board.

A liquid crystal display apparatus, comprising:

• a plurality of backlight apparatuses each including a plurality light source apparatuses each having a plurality light-emitting diode units each including a plurality of light-emitting diodes of different colors nonlinearly and closely arranges on a wiring board;
• and
• a liquid crystal panel allowing a picture to be displayed by changing a transmittance of emitted light from the light-emitting diode unit
• wherein,
• each of plurality of the light-emitting diode units are arranged on the wiring board at predetermined intervals in a first direction, and
• each of the backlight apparatuses are arranged in a matrix in a housing in a first direction and a second direction nearly orthogonal to the first direction,
• each light-emitting diode unit includes one red light-emitting diode, one blue light-emitting diode, one first green light emitting diode having a first chromaticity and a first luminance and one second green light emitting diode having a second chromaticity and a second luminance which are different than the first chromaticity and the first luminance,
• the first and second diodes are configured such that the average chromaticity of the light emitting diode unit is equal to a predetermined value and the average luminance of the light-emitting diode unit is a predetermined value,
• the red light-emitting diode and the blue light-emitting diode of each light-emitting unit are provided on a first line that is nearly parallel to the first direction of the light emitting diode units on the wiring board,
• the first green light-emitting diode and the second green light-emitting diode of each light emitting diode unit are provided on a second line nearly orthogonal to the first line such that respective distances from the first and second green light emitting diodes to the red light-emitting diode and the blue light emitting diode are nearly equal, and
• the light emitting diode units are arranged such that the first green light-emitting diodes and the second green light-emitting diodes are arranged in a zig-zag pattern along the first direction of the light-emitting diode units on the wiring board.