Head-up display device having light sources arranged in rows supplied with different currents

A head-up display device configured to project an image on a windshield of a vehicle, comprising:

• a housing;
• a plurality of light sources housed at the housing and configured to emit light;
• a display panel configured to display the image based on the light emitted from the plurality of light sources;
• and
• an optical part disposed between the plurality of light sources and the display panel, the optical part comprising:
• a first optical part configured to collect the light emitted from the light sources, the first optical part including a plurality of first optical structures respectively disposed corresponding to the plurality of light sources and protruding in a first direction toward the plurality of light sources;
• and
• a second optical part configured to emit the light collected by the first optical part towards the display panel, the second optical part including a plurality of second optical structures respectively disposed corresponding to the plurality of first optical structures and spaced apart from each other, each second optical structure having a convex shape protruding in a second direction toward the display panel,
• wherein the plurality of light sources are arranged in a plurality of rows, each row being at a mutually different distance from the windshield and supplied with a mutually different current set to compensate a deterioration in light uniformity of the image projected on the windshield due to the mutually different distance between each row and the windshield, the plurality of rows including first and second rows respectively being at first and second distances to the windshield, the second distance being greater than the first distance, and
• wherein the plurality of light sources comprises:
• a first light source arranged on the first row and supplied with a first current;
• and
• a second light source arranged on the second row and supplied with a second current greater than the first current.

A head-up display device configured to project an image on a windshield of a vehicle, comprising:

• a housing;
• a plurality of light sources housed at the housing and configured to emit light;
• a display panel configured to display the image based on the light emitted from the plurality of light sources;
• an optical part disposed between the plurality of light sources and the display panel, the optical part comprising:
• a first optical part configured to collect the light emitted from the light sources, the first optical part including a plurality of first optical structures respectively disposed corresponding to the plurality of light sources and protruding in a first direction toward the plurality of light sources;
• and
• a second optical part configured to emit the light collected by the first optical part towards the display panel, the second optical part including a plurality of second optical structures respectively disposed corresponding to the plurality of first optical structures and spaced apart from each other, each second optical structure having a convex shape protruding in a second direction toward the display panel;
• and
• a drive unit configured to control rotation of the housing and comprising a support unit coupled to the housing and a driving motor unit configured to rectilinearly move the support unit,
• wherein the light sources are arranged in a plurality of rows including first and second rows, each row being at a mutually different distance from the windshield and supplied with a mutually different current set to compensate a deterioration in light uniformity of the image projected on the windshield due to the mutually different distance between each row and the windshield, the light sources including:
• a plurality of first light sources arranged on the first row and being at a first distance to the windshield;
• and
• a plurality of second light sources arranged on the second row and being at a second distance to the windshield greater than the first distance, and
• wherein the first light sources are applied with a first current, and the second light sources are applied with a second current greater than the first current.

A head-up display device comprising:

• a plurality of light source configured to emit light and arranged in a plurality of rows including first and second rows;
• a display panel configured to display an image based on the light emitted from the plurality of light source;
• an optical part positioned between the plurality of light sources and the display panel and comprising:
• a first optical part configured to collect the light emitted from the light sources, the first optical part including a plurality of first optical structures respectively disposed corresponding to the plurality of light sources and protruding in a first direction toward the plurality of light sources;
• and
• a second optical part configured to emit the light collected by the first optical part towards the display panel, the second optical part including a plurality of second optical structures respectively disposed corresponding to the plurality of first optical structures and spaced apart from each other, each second optical structure having a convex shape protruding in a second direction toward the display panel;
• and
• a Fresnel lens configured to magnify the image displayed at the display panel and project the magnified image on a windshield of a vehicle,
• wherein each row is at a mutually different distance from the windshield and is supplied with a mutually different current set to compensate a deterioration in light uniformity of the magnified image projected on the windshield due to the mutually different distance between each row and the windshield,
• wherein the plurality of light sources comprises:
• a plurality of first light sources arranged on the first row and being at a first distance to the windshield;
• and
• a plurality of second light sources arranged on the second row and being at a second distance to the windshield, the second distance being greater than the first distance, and
• wherein the first light sources are applied with a first current, and the second light sources are applied with a second current greater than the first current.