A backlight comprising: a dual-direction optical collimator (100,210) comprising: a vertical collimator (110,212) configured to collimate light in a vertical direction, wherein the vertical collimator comprises an optical reflector having a tilt angle; and a horizontal collimator (120,214) configured to collimate light in a horizontal direction substantially orthogonal to the vertical direction, the horizontal collimator being located adjacent to an output of the vertical collimator to horizontally collimate vertically collimated light from the vertical collimator to provide dual-direction collimated light at an output of the dual-direction optical collimator, wherein the vertical collimator is integral to and comprises a material of the horizontal collimator, wherein the material of the dual-direction optical collimator serves as a light guide configured to guide the vertically collimated light toward the horizontal collimator, and configured to guide the dual-direction collimated light to the output of the dual-direction optical collimator; and a plate light guide coupled to the output of the dual-direction optical collimator, wherein the plate light guide is configured to emit a portion of the guided, dual-direction collimated light from a surface of the plate light guide and wherein the dual-direction optical collimator is configured to provide the dual-direction collimated light at the non-zero propagation angle relative to a horizontal plane corresponding to the horizontal direction, the plate light guide being configured to receive and to guide the dual-direction collimated light at said non-zero propagation angle relative to said surface, the tilt angle of the vertical collimator being configured to provide the non-zero propagation angle of the dual-direction collimated light. a dual-direction optical collimator (100,210) comprising: a vertical collimator (110,212) configured to collimate light in a vertical direction, wherein the vertical collimator comprises an optical reflector having a tilt angle; and a horizontal collimator (120,214) configured to collimate light in a horizontal direction substantially orthogonal to the vertical direction, the horizontal collimator being located adjacent to an output of the vertical collimator to horizontally collimate vertically collimated light from the vertical collimator to provide dual-direction collimated light at an output of the dual-direction optical collimator, wherein the vertical collimator is integral to and comprises a material of the horizontal collimator, wherein the material of the dual-direction optical collimator serves as a light guide configured to guide the vertically collimated light toward the horizontal collimator, and configured to guide the dual-direction collimated light to the output of the dual-direction optical collimator; and a vertical collimator (110,212) configured to collimate light in a vertical direction, wherein the vertical collimator comprises an optical reflector having a tilt angle; and a horizontal collimator (120,214) configured to collimate light in a horizontal direction substantially orthogonal to the vertical direction, the horizontal collimator being located adjacent to an output of the vertical collimator to horizontally collimate vertically collimated light from the vertical collimator to provide dual-direction collimated light at an output of the dual-direction optical collimator, wherein the vertical collimator is integral to and comprises a material of the horizontal collimator, wherein the material of the dual-direction optical collimator serves as a light guide configured to guide the vertically collimated light toward the horizontal collimator, and configured to guide the dual-direction collimated light to the output of the dual-direction optical collimator; and a plate light guide coupled to the output of the dual-direction optical collimator, wherein the plate light guide is configured to emit a portion of the guided, dual-direction collimated light from a surface of the plate light guide and wherein the dual-direction optical collimator is configured to provide the dual-direction collimated light at the non-zero propagation angle relative to a horizontal plane corresponding to the horizontal direction, the plate light guide being configured to receive and to guide the dual-direction collimated light at said non-zero propagation angle relative to said surface, the tilt angle of the vertical collimator being configured to provide the non-zero propagation angle of the dual-direction collimated light.