Car seat head rest with built-in screen

A car seat head rest for mounting on a car seat having two spaced apart retention slots, comprising:

• a head pillow having a rear side, a bottom side and an interior cavity;
• a display screen supported at said rear side of said head pillow;
• and
• an adjustable mounting arrangement, which comprises:
• a length-adjustable sliding guider longitudinally supported within said interior cavity of said head pillow;
• a supporting frame, which is coupled with said sliding guider, comprising two overlapped sliding panels supported in said interior cavity of said head pillow in a slidably movable manner and two supporting arms downwardly and parallelly extended from said sliding panels respectively through said bottom side of said head pillow to define an engaging distance between said two supporting arms;
• and
• an adjuster provided at said sliding guider to control a length of said sliding guider so as to selectively adjust said engaging distance of said supporting arms, wherein when said engaging distance of said supporting arms is adjusted corresponding to a distance between said two retention slots of said car seat, said two supporting arms are adapted for slidably engaging with said two retention slots respectively so as to securely support said head pillow on said car seat.