Light-emitting device, display screen and lighting equipment

The invention relates to a light-emitting device, a display screen and lighting equipment, the light-emitting device comprises a circuit substrate, an LED light source arranged on the front face of the circuit substrate and a packaging lens covering the LED light source, and the top face and the side face of the LED light source both emit light; the ratio of a first maximum distance H1 between the light-emitting surface of the packaging lens and the front surface of the circuit substrate to a second maximum distance H2 between the top light-emitting surface of the LED light source and the front surface of the circuit substrate is 1.5-10; the ratio of the first maximum width W1 to the first maximum width H1 of the packaging lens is 0.75-5.3, so that the packaging lens has a specific shape, the top light-emitting surface and the side light-emitting surface of the LED light source are located at proper positions in the packaging lens, and the incident angle entering the light-emitting surface of the packaging le