Lighting keyboard and backlight module

A lighting keyboard comprising:

• a plurality of keys;
• and
• a backlight module located below the plurality of keys, the backlight module comprising a plurality of light emitting units and a light guide plate, three of the plurality of light emitting units being arranged in a triangle, the light guide plate being provided with two relatively sparser microstructure regions and at least one relatively denser microstructure region on a connection line of at least two of the three light emitting units, the two relatively sparser microstructure regions being respectively close to the at least two light emitting units, the at least one relatively denser microstructure region being located between the two relatively sparser microstructure regions.

A backlight module comprising:

• a plurality of light emitting units, three of the plurality of light emitting units being arranged in a triangle;
• and
• a light guide plate, the light guide plate being provided with two relatively sparser microstructure regions and at least one relatively denser microstructure region on a connection line of at least two of the three light emitting units, the two relatively sparser microstructure regions being respectively close to the at least two light emitting units, the at least one relatively denser microstructure region being located between the two relatively sparser microstructure regions.