Display device with integrated photovoltaic cells, with improved luminosity
A display device, in particular digital display screen, with integrated photovoltaic cells, including (a) an array of image zones emitting light or backlit by a light source placed behind the array of image zones, (b) an array formed by a plurality of photovoltaic cells and a plurality of orifices, in which array two neighboring photovoltaic cells form an orifice, and (c) a lenticular array making it possible to focus the light emitted by the image zones into the orifice between two neighboring photovoltaic cells. The lenticular array of the display device is positioned between the array of image zones and the array of photovoltaic cells.
1. A display device, with integrated photovoltaic cells, comprising:
an array of image zones emitting light or backlit by a light source placed behind the array of image zones;
an array formed by a plurality of photovoltaic cells and a plurality of orifices formed between two neighboring photovoltaic cells of said array; and
a lenticular array for focusing the light emitted by said image zones into the orifice between two neighboring photovoltaic cells, wherein
said lenticular array is positioned between said array of image zones and said array of photovoltaic cells.
2. The display device according to claim 1 , wherein the display device is a digital display screen.
3. The display device according to claim 2 , wherein the display device is a flexible screen.
4. The display device according to claim 1 , wherein said image zones are pixels.
5. The display device according to claim 1 , wherein said lenticular array comprises a juxtaposition of identical rectilinear lenses, with the longitudinal axis of the lenticular array being parallel to the array of photovoltaic cells.
6. The display device according to claim 1 , wherein the lenses of said lenticular array are selected from the group formed by plane-convex, biconvex, symmetric, asymmetric, spherical and/or aspherical lenses, or by variable-index lenses.
7. The display device according to claim 1 , wherein said array of photovoltaic cells is protected by a protective layer having an antireflection layer.
8. The display device according to claim 1 , wherein said photovoltaic cells are thin-film cells based on one of amorphous silicon, microcrystalline silicon, CdTe, CIGS, and polymers.
9. The display device according to claim 1 , wherein said photovoltaic cells are at least partially transparent to visible light.
10. The display device according to claim 1 , wherein said image zones are ordered in such a way that various groups of image zones generate different images.
11. The display device according to claim 1 , wherein an external face of the display comprises a tactile film or layer.
12. The display device according to claim 1 , wherein said device includes two different sets of photovoltaic cells; one set dedicated to the photovoltaic conversion of ambient or external light, and another set dedicated to the photovoltaic conversion of internal of diffused light provided by the image zones and/or by the backlighting light source.
13. The display device according to claim 12 , wherein the device includes a first set of photovoltaic cells arranged on the external surface of a photovoltaic plate in order to convert the external light, and a second set of photovoltaic cells arranged on the internal surface of the photovoltaic plate in order to convert the internal light.
14. A portable or fixed electronic apparatus comprising a digital display screen according to claim 2 .
15. A photovoltaic plate with integrated lenses for the manufacture of a display device according to claim 1 , comprising a transparent film or substrate, said film or substrate comprising a lenticular array, and said film or substrate comprising an array of photovoltaic cells.
16. Method of manufacturing a display device with integrated photovoltaic cells, in which a digital display screen comprising a smooth external surface is provided, and in which a photovoltaic plate with integrated lenses according to claim 15 is provided, and in which said photovoltaic film with integrated lenses is fixed, onto said digital display screen so as to form a digital display screen with integrated photovoltaic cells.
17. The photovoltaic plate according to claim 15 wherein said transparent film or substrate is flexible or semi-rigid.
18. The photovoltaic plate according to claim 15 wherein said photovoltaic cells are protected by at least one continuous or discontinuous protective layer.
19. The method according to claim 16 wherein the fixing of said integrated lenses includes gluing said lenses onto said digital display screen.