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Display device

a display device and display technology, applied in the field of display devices, can solve problems such as the increase of manufacturing costs

Inactive Publication Date: 2014-09-11
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patent text is that it describes a configuration that can improve the display quality of a display device by reducing the light emitted in the transmissive region and suppressing unevenness in the display region. Additionally, it can provide a reflecting layer that is easy to form and provide a mask formation film.

Problems solved by technology

However, in the configuration where light emitting functional layers are formed on both sides of a cathode, there may be an increase in manufacturing cost.

Method used

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Effect test

first embodiment

[0039]FIG. 1 is a perspective view illustrating an outline of an organic EL device 91 relating to the first embodiment of the invention and organic EL devices relating to each of the other embodiments described later. The organic EL device 91 has a display region 100 where both the upper surface and lower surface substantially overlap in a plan view. A surface seen with an eye 80 on a left side is an upper surface 3 which is a first surface, and a surface seen with an eye 80 on a right side is a lower surface 4 which is a second surface.

[0040]From the upper surface 3, a first display light 5 is irradiated, and from the lower surface 4, a second display light 6, which is different display light from the first display light 5, is irradiated. “Different display light” refers to light forming a different image. Accordingly, the organic EL device 91 can display images which are each different to two viewers who are positioned to be facing with the organic EL device 91 therebetween. Here,...

second embodiment

[0082]Next, the second embodiment of this invention will be described. The organic EL device 92 relating to the present embodiment has the same purpose of use and configuration as the organic EL device 91 relating to the first embodiment, and the components are also the same. That is, as shown in FIG. 1, both the first surface 3 and the second surface 4 have display regions 100 which substantially overlap in a plan view, and both of the surfaces (3, 4) can display images which are each different. In addition, due to the transmissive region 43 (refer to FIGS. 2A and 2B and the like) formed in the display region 100, the opposing side (that is, the opposite side) through the organic EL device can be visually recognized. The arrangement configuration of the three types of regions including the transmissive region 43 is also the same. That is, a column arrangement as shown in FIG. 2A has been adopted.

[0083]The organic EL device 92 is different from the organic EL device 91 of the first ...

third embodiment

[0111]Next, the third embodiment of this invention is described. An organic EL device 93 of the third embodiment is a double-sided display organic EL device in the same manner as the organic EL device in the embodiments described above. The provision of the transmissive region 43 is also the same. The difference is that color images are displayed on one surface (one side) and black and white images are display on the other surface (other side). Accordingly, the purpose of use and configuration are the same as both the organic EL device 91 and the organic EL device 92, and the components are also similar. Therefore, in the description below, configuration components which, are common with configuration components of the organic EL devices (91, 92) described above are given the same symbols and a part of the description is not repeated.

[0112]FIG. 3C is a diagram illustrating an arrangement configuration of pixel regions in the display region 100 of the organic EL device 93. As shown i...

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PUM

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Abstract

A display device includes a light emitting functional layer disposed between a first and second substrates; a first pixel which emits light to the second substrate and has a first pixel electrode disposed between the light emitting functional layer and the first substrate, a second electrode disposed between the light emitting functional layer and the second substrate, and a first reflecting layer disposed between the first pixel electrode and the first substrate; a second pixel which emits light to the first substrate side and has a second pixel electrode disposed between the light emitting functional layer and the first substrate, a second electrode disposed between the light emitting functional layer and the second substrate, and a second reflecting layer disposed between the second electrode and the second substrate; and a driving element which drives the first and second pixel electrodes is disposed above first substrate.

Description

[0001]This is a Continuation Application of application Ser. No. 12 / 967,402 filed Dec. 14, 2010 which is a National Phase of JP 2009-287303 filed Dec. 18, 2009. The disclosure of the prior application is hereby incorporate by reference herein in its entirety.BACKGROUND[0002]1. Technical Field[0003]The present invention relates to a display device.[0004]2. Related Art[0005]Organic EL (electroluminescent) devices, which use an electroluminescence phenomenon where light is emitted due to applying of an electric current, are increasingly being used as display devices. As a new use application in recent years, there has been considered a use method where both front and back surfaces can be seen at the same time. As a double-sided display organic EL device corresponding to this use application, in JP-A-2000-58260, for example, a configuration is proposed where light emitting functional layers including at least an electroluminescence layer are formed on both sides of a cathode. Also, in J...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01L27/32
CPCH01L27/3267G09G3/3225G09G2300/023G09G2320/0233H10K59/38H10K59/121H10K59/128H10K2102/3031
Inventor KOBAYASHI, HIDEKAZU
Owner SEIKO EPSON CORP
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