Display device, and vehicle-mounted display device and electronic

• US 7,400,261 B2
• Filed: 04/09/2004
• Issued: 07/15/2008
• Est. Priority Date: 04/11/2003
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Watanabe, Yasuko, Tachimura, Yuko
• Primary Examiner(s): GOINS, DAVETTA WOODS
• Application Number:
  US10/820,810
• Publication Number:
  US 20040201548A1
• Time in Patent Office: 1,558 Days
• Field of Search: 340/815.4, 340/815.45, 340/815.49, 340/815.52, 340/815.55, 340/438, 345/77, 345/76, 345/87, 345/204, 345/205, 349/151, 349/152, 349/149
• US Class Current: 340/815.4
• CPC Class Codes: G09G 2300/046 with an emissive area and a light-modulating area combined in one pixel
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters

Abstract

To provide a display device, a vehicle-mounted display device, and an electronic device whose chassis are not large with much design freedom. In the present invention, a plurality of light-emitting elements each having a luminescent material sandwiched between a pair of electrodes having transparency, a plurality of liquid crystal elements each having a liquid crystal material sandwiched between a pair of electrodes having transparency are arranged in a display device over a substrate having a mirror surface. Further, a plurality of light-emitting elements each having a luminescent material sandwiched between a pair of electrodes having transparency, a plurality of liquid crystal elements each having a liquid crystal material sandwiched between a pair of electrodes having transparency are arranged in a display device over a substrate having a reflecting surface. The display device is secured to the substrate with a barrier film therebetween.

Claims

1. A display device comprising:

a substrate having a minor surface; and

a display means over the substrate having a minor surface; and

an image sensing means over the substrate having a mirror surface,

wherein a plurality of light-emitting elements each having a luminescent material sandwiched between a pair of electrodes having light-transmittivity are arranged in the display means, and

wherein a plurality of photovoltaic conversion elements are arranged in the image sensing means.

3. A display device according to claim 1, wherein the display device is used as a side-view mirror for vehicle.

5. A display device according to claim 1, wherein the display device is used as a rearview mirror for vehicle.

7. A display device according to claim 1, wherein the display device is applied to an electronic device selected from the group consisting of a portable terminal and a PDA.

9. A display device according to claim 1, wherein an insulating film is formed over the plurality of light-emitting elements and the photovoltaic conversion element is formed over the insulating film.

2. A display device comprising:

a substrate having a reflecting surface;

a display means over the substrate having a reflecting surface; and

an image sensing means over the substrate having a reflecting surface,

wherein a plurality of light-emitting elements each having a luminescent material sandwiched between a pair of electrodes having light-transmittivity are arranged in the display means,

wherein a plurality of photovoltaic conversion elements are arranged in the image sensing means, and

wherein the display means and the image sensing means are secured to the substrate with a barrier film therebetween.

4. A display device according to claim 2, wherein the display device is used as a side-view mirror for vehicle.

6. A display device according to claim 2, wherein the display device is used as a rearview mirror for vehicle.

8. A display device according to claim 2, wherein the display device is applied to an electronic device selected from the group consisting of a portable terminal and a PDA.

10. A display device according to claim 2, wherein an insulating film is formed over the plurality of light-emitting elements and the photovoltaic conversion element is formed over the insulating film.

11. A display device comprising:

a substrate;

a reflection coating film over the substrate;

a first insulating film over the reflection coating film;

a first light-transmissive electrode and a second light-transmissive electrode over the first light-transmissive electrode with a luminescent material sandwiched therebetween, over the first insulating film;

a second insulating film over the second light-transmissive electrode; and

a photovoltaic conversion element over the second insulating film.

13. A display device according to claim 11, wherein the display device is used as a side-view mirror for vehicle.

15. A display device according to claim 11, wherein the display device is used as a rearview mirror for vehicle.

17. A display device according to claim 11, wherein the display device is applied to an electronic device selected from the group consisting of a portable terminal and a PDA.

19. A display device according to claim 11, wherein the photovoltaic conversion element includes a p-layer, i-layer, and an n-layer, wherein the p-layer is connected to an electrode and the n-layer is connected to an electrode.

21. A display device according to claim 11, wherein the reflection coating film is at least one selected from the group consisting of aluminum, silver, gold, copper, cadmium, nickel, platinum, rhodium, tungsten, titanium, tantalum, molybdenum, chrome, neodymium, iron, nickel, cobalt, zirconium, zinc, ruthenium, palladium, osmium, iridium, and tin.

12. A display device comprising:

a substrate;

a reflection coating film over the substrate;

a first insulating film over the reflection coating film;

a transistor formed over the first insulating film;

a first light-transmissive electrode electrically connected to the transistor, and

a second light-transmissive electrode over the first light-transmissive electrode with a luminescent material sandwiched therebetween, over the first insulating film;

a second insulating film over the second light-transmissive electrode; and

a photovoltaic conversion element over the second insulating film.

14. A display device according to claim 12, wherein the display device is used as a side-view mirror for vehicle.

16. A display device according to claim 12, wherein the display device is used as a rearview mirror for vehicle.

18. A display device according to claim 12, wherein the display device is applied to an electronic device selected from the group consisting of a portable terminal and a PDA.

20. A display device according to claim 12, wherein the photovoltaic conversion element includes a p-layer, i-layer, and an n-layer, wherein the p-layer is connected to an electrode and the n-layer is connected to an electrode.

22. A display device according to claim 12, wherein the reflection coating film is at least one selected from the group consisting of aluminum, silver, gold, copper, cadmium, nickel, platinum, rhodium, tungsten, titanium, tantalum, molybdenum, chrome, neodymium, iron, nickel, cobalt, zirconium, zinc, ruthenium, palladium, osmium, iridium, and tin.