Backlight keyswitch and backlight module thereof

A backlight keyswitch comprising:

• a keyswitch body having a cap with at least one first symbol formed thereon;
• and
• a backlight module disposed under the cap, the backlight module comprising:
• a backlight circuit board having a backlight source, the backlight source comprising a plurality of lighting units arranged sequentially along a longitudinal direction for respectively emitting a plurality of color lights, the plurality of lighting units comprising a first lighting unit and a second lighting unit disposed at two ends of the plurality of lighting units along the longitudinal direction;
• and
• a light guide plate disposed above the backlight circuit board and having an accommodating hole for accommodating the backlight source, a first hole wall of the accommodating hole being divided into a first section and a second section respectively corresponding to the first lighting unit and the second lighting unit, wherein the first section guides a first color light of the plurality of color lights emitted by the first lighting unit toward the second section, the second section guides a second color light of the plurality of color lights emitted by the second lighting unit toward the first section, and the first section and the second section are at least partially not parallel to the longitudinal direction.

A backlight module comprising:

• a backlight circuit board having a backlight source, the backlight source comprising a plurality of lighting units arranged sequentially along a longitudinal direction for respectively emitting a plurality of color lights different from each other, the plurality of lighting units comprising a first lighting unit and a second lighting unit disposed at two ends of the plurality of lighting units along the longitudinal direction;
• a light-blocking sheet located above the backlight circuit board, the light-blocking sheet having at least one transparent region;
• a light guide plate located between the light-blocking sheet and the backlight circuit board, the light guide plate having an accommodating hole for accommodating the backlight source;
• and
• a micro optical layer disposed in parallel to the light guide plate and formed corresponding to the at least one transparent region for guiding the plurality of color lights to emit from the light guide plate to the at least one transparent region;
• wherein the micro optical layer forms a first clearance area near the first lighting unit in the longitudinal direction, and the micro optical layer forms a second clearance area near the second lighting unit in the longitudinal direction;
• wherein the plurality of color lights are mixed in the first clearance area to obtain a first mixed color, and the plurality of color lights are mixed in the second clearance area to obtain a second mixed color, and the first mixed color is similar to the second mixed color.