Display device and electronic device with microlens array and light emitting element substrates bonded by adhesive layer
There is provided a display device including: a first substrate that is a silicon substrate and on which a plurality of light-emitting elements is formed; a second substrate including, on a surface, a color filter layer including a plurality of color filters arrayed and a microlens layer including a plurality of microlenses arrayed that are layered in this order, the microlens layer being arranged to face the plurality of light-emitting elements with respect to the first substrate; and an adhesive layer that fills a gap between the first substrate and the second substrate for bonding the first substrate and the second substrate together.
1. A display device comprising:
a first substrate that is a silicon substrate and on which a plurality of light-emitting elements is formed;
a second substrate including, on a surface, a color filter layer including a plurality of color filters arrayed, a planarizing layer formed on the color filter layer, and a microlens layer formed on the planarizing layer, the microlens layer including a plurality of microlenses arrayed, the microlens layer being arranged to face the plurality of light-emitting elements with respect to the first substrate; and
an adhesive layer that fills a gap between the first substrate and the second substrate for bonding the first substrate and the second substrate together, wherein
each of the microlenses has a convex shape protruding toward a corresponding one of the light-emitting elements,
a refractive index of a material of the adhesive layer is smaller than a refractive index of a material of the microlens layer, and
the display device is a microdisplay having a panel size of 0.2 inches to 2 inches.
2. The display device according to claim 1 , wherein
a pixel size of the display device is equal to or less than 20 μm.
3. The display device according to claim 1 , wherein
an array of the color filters is a square array.
4. The display device according to claim 1 , wherein
an array of the color filters is a delta array.
5. The display device according to claim 1 , wherein
a shape of each of the microlenses as viewed from a layering direction is circular.
6. The display device according to claim 1 , wherein
a shape of each of the microlenses as viewed from a layering direction is a square shape.
7. The display device according to claim 1 , wherein the planarizing layer includes a material having a refractive index of 1.0 to 2.5.
8. The display device according to claim 1 , wherein a film thickness of the planarizing layer is equal to or less than 10 μm.
9. An electronic device comprising
a display device that performs display on a basis of an image signal, wherein
the display device includes
a first substrate that is a silicon substrate and on which a plurality of light-emitting elements is formed,
a second substrate including, on a surface, a color filter layer including a plurality of color filters arrayed, a planarizing layer formed on the color filter layer, and a microlens layer formed on the planarizing layer, the microlens layer including a plurality of microlenses arrayed, the microlens layer being arranged to face the plurality of light-emitting elements with respect to the first substrate, and
an adhesive layer that fills a gap between the first substrate and the second substrate for bonding the first substrate and the second substrate together, wherein
each of the microlenses has a convex shape protruding toward a corresponding one of the light-emitting elements,
a refractive index of a material of the adhesive layer is smaller than a refractive index of a material of the microlens layer, and
the display device is a microdisplay having a panel size of 0.2 inches to 2 inches.
10. The electronic device according to claim 9 , wherein
a pixel size of the display device is equal to or less than 20 μm.
11. The electronic device according to claim 9 , wherein
an array of the color filters is a square array.
12. The electronic device according to claim 9 , wherein
an array of the color filters is a delta array.
13. The electronic device according to claim 9 , wherein
a shape of each of the microlenses as viewed from a layering direction is circular.
14. The electronic device according to claim 9 , wherein
a shape of each of the microlenses as viewed from a layering direction is a square shape.
15. The electronic device according to claim 9 , wherein the planarizing layer includes a material having a refractive index of 1.0 to 2.5.
16. The electronic device according to claim 9 , wherein a film thickness of the planarizing layer is equal to or less than 10 μm.