Distance measurement module, distance measure method and electronic apparatus

An electronic apparatus for detecting distances from the electronic apparatus to external objects, the apparatus comprising:

• a substrate;
• a light receiving sensor arranged over the substrate;
• one or more light sources arranged over the substrate, the one or more light sources including a first light source and a second light source;
• a first lens holder, the first lens holder being opaque and comprising a first lens, the first lens holder arranged over the first light source, and the first lens arranged to direct light emitted by the first light source;
• a second lens holder, the second lens holder being opaque and comprising a second lens, the second lens holder arranged over the light receiving sensor and the second light source, and the second lens configured to direct light received by the second lens onto the light receiving sensor;
• and
• a transparent member arranged between the second lens and the light receiving sensor and configured to:
• transmit the light directed by the second lens onto the light receiving sensor;
• and
• reflect light from at the second light source onto the light receiving sensor,
• a signal change detection circuit coupled to the light receiving sensor and detecting a change in reception of the light reflected onto the light receiving sensor on the basis of a predetermined level;
• wherein at least part of the first lens holder and at least part of the second lens holder are arranged between the first lens and the second lens,
• wherein the second lens holder forms a seal of a space between a portion of the substrate and the transparent member, and
• wherein the first lens holder shields and separates the first light source from the second light source and the second lens and
• a transparent cover glass attached to the at least one lens holder, facing a mounting surface of the substrate, and covering at least one of the one or more light sources.