Abstract: A backlight module comprising an upper backlight unit, and a lower backlight unit positioned beneath the upper backlight unit. The upper backlight unit includes an upper light source, an upper light guide plate for receiving light emitted from the upper light source, and a first prism sheet located on the light-emitting side of the upper light guide plate. The first prism sheet includes multiple first prisms arranged along a first direction, where the first prisms extend along a second direction, and their tips are oriented towards the upper light guide plate. The upper light source includes multiple light-emitting elements arranged along the second direction.

Abstract: A height adjusting structure for a desk is applied to adjust a height of a desktop which is connected with two first supporting tubes fitted with two second supporting tubes and contains: a through hole defined adjacent to a top end of each second supporting tube to expose each first supporting tube fitted in each second supporting tube; two adjustors arranged adjacent to two top ends of the two second supporting tubes. Preferably, one of the two adjustors has a swing lever disposed thereon to drive a driving gear and has a driven gear driven by the driving gear, and the other of the two adjustors has a driven gear fixed therein and simultaneously rotating with the driven gear of one of the two adjustors through a connecting rod.