A mobile terminal, characterized by comprising: a display module, a housing with a side frame, and an optical package assembly, wherein the optical package assembly comprises: a substrate, a light sensor chip, and a protection portion, wherein the protection portion and the light sensor chip both are fixed to the substrate, the light sensor chip is packaged in the protection portion, the light sensor chip comprises a light sensing region, a plane on which the light sensing region of the light sensor chip is located intersects with a plane of the substrate where the protection portion and the light sensor chip both are fixed to, and the protection portion comprises a light entering region; wherein the display module comprises a display screen and a transparent cover plate covering the display screen, the transparent cover plate is fixed to the side frame in a bonding manner, the optical package assembly is disposed in accommodation space formed by the transparent cover plate and the housing and is located between the side frame and the display screen, and a light sensing region of the light sensor chip faces to the side frame; wherein a light entering hole is formed on the transparent cover plate; wherein the protection portion is a sealing compound portion, the sealing compound portion is transparent glue, the sealing compound portion comprises the light entering region, a light entering direction of the light entering region intersects with an orientation of a light sensing region of the light sensor chip, a first reflector is disposed in the sealing compound portion, and the first reflector is used to receive ambient light that enters the light entering region, and reflect the ambient light to the light sensing region; or, wherein the protection portion is a package cover, the package cover has an inner cavity, the light sensor chip is disposed in the inner cavity, the package cover comprises the light entering region, a light entering direction of the light entering region intersects with an orientation of a light sensing region of the light sensor chip, a second reflector is disposed in the inner cavity, and the second reflector is used to receive ambient light that enters the light entering region, and reflect the ambient light to the light sensing region. wherein the optical package assembly comprises: a substrate, a light sensor chip, and a protection portion, wherein the protection portion and the light sensor chip both are fixed to the substrate, the light sensor chip is packaged in the protection portion, the light sensor chip comprises a light sensing region, a plane on which the light sensing region of the light sensor chip is located intersects with a plane of the substrate where the protection portion and the light sensor chip both are fixed to, and the protection portion comprises a light entering region; wherein the display module comprises a display screen and a transparent cover plate covering the display screen, the transparent cover plate is fixed to the side frame in a bonding manner, the optical package assembly is disposed in accommodation space formed by the transparent cover plate and the housing and is located between the side frame and the display screen, and a light sensing region of the light sensor chip faces to the side frame; wherein a light entering hole is formed on the transparent cover plate; wherein the protection portion is a sealing compound portion, the sealing compound portion is transparent glue, the sealing compound portion comprises the light entering region, a light entering direction of the light entering region intersects with an orientation of a light sensing region of the light sensor chip, a first reflector is disposed in the sealing compound portion, and the first reflector is used to receive ambient light that enters the light entering region, and reflect the ambient light to the light sensing region; or, wherein the protection portion is a package cover, the package cover has an inner cavity, the light sensor chip is disposed in the inner cavity, the package cover comprises the light entering region, a light entering direction of the light entering region intersects with an orientation of a light sensing region of the light sensor chip, a second reflector is disposed in the inner cavity, and the second reflector is used to receive ambient light that enters the light entering region, and reflect the ambient light to the light sensing region.