Display device with integrated photodiode array

A display device comprising:

• a display region including a plurality of pixels arranged in a matrix and photodiodes arranged on regions not overlapped with the plurality of pixels in the matrix;
• and
• a laminated structure including at least a metal layer and provided on the photodiode, wherein
• each of the plurality of pixels includes a transistor including a first semiconductor layer,
• each of the photodiodes includes a second semiconductor layer,
• in at least two layers including the metal layer in the laminated structure, slits or holes are provided such that external light is incident on the photodiode,
• a slit or a hole formed on one of the at least two layers and a slit or a hole formed on another of the at least two layers are provided by being overlapped with each other;
• both of the at least two layers are over the first semiconductor layer and the second semiconductor layer, and
• the slit or the hole formed on the one of the at least two layers and the slit or the hole formed on the another of the at least two layers overlap with the second semiconductor layer.