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Light extraction device, manufacturing method of light extraction device, and display device

A manufacturing method and light extraction technology, applied in the direction of lighting devices, electroluminescent light sources, semiconductor/solid-state device manufacturing, etc., can solve the problems of limited extraction efficiency and inability to be extracted

Inactive Publication Date: 2012-02-01
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the light-transmitting layer 9 has a higher refractive index than the air layer 8, the light Lθ having an incident angle θ equal to or greater than the critical angle with respect to the interface between the air layer 8 and the light-transmitting layer 9 is totally reflected on the interface, Therefore cannot be extracted to the air layer 8 side
Therefore, the extraction efficiency of the outgoing light from the light emitting layer 1 is greatly limited depending on the exit angle of the light from the light emitting layer 1

Method used

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  • Light extraction device, manufacturing method of light extraction device, and display device
  • Light extraction device, manufacturing method of light extraction device, and display device
  • Light extraction device, manufacturing method of light extraction device, and display device

Examples

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no. 1 example

[0035] figure 1 is a cross-sectional view showing a schematic structure of a light extraction device and a display device provided with the light extraction device according to a first embodiment of the present invention. The display device 20 of this embodiment includes a light emitting layer 21 including red (R), green (G) and blue (B) light emitting devices 21R, 21G and 21B respectively constituting light emitting pixel regions. The light emitting layer 21 is formed on the front surface of the panel substrate 22 , and the light extraction device 23 is provided on the light emitting surface of the light emitting layer 21 , thereby constituting the display device 20 .

[0036]The light-emitting devices 21R, 21G, and 21B are all formed by existing self-luminous devices (such as light-emitting diodes (LEDs) and organic or inorganic electroluminescence (EL) devices), and their luminous brightness is adjusted according to the magnitude of the input current. In addition, these l...

no. 2 example

[0071] Figure 10 is a sectional view showing a schematic structure including a light extraction device and a display device according to a second embodiment of the present invention. In the display device 40 of this embodiment, the structure of the light extraction device 43 bonded to the light emitting layer 21 through the bonding layer 24 is different from that of the light extraction device 23 according to the first embodiment.

[0072] The light extraction device 43 includes a light-transmitting portion 46 through which light emitted from the light-emitting layer 21 passes, and a reflective surface 47 formed around the light-transmitting portion 26 and changing an emission angle of light from the light-emitting layer 21 . The translucent portion 46 is composed of a structure 48 including a colored layer 48a and a transparent layer 48b. The reflective surface 47 is formed on the interface between the side peripheral surfaces of the structural bodies 48 and the space porti...

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Abstract

The present invention aims to provide a light extraction device having a reflector function and a color filter function. The light extraction device (23) according to the embodiment of the present invention includes a light-transmitting part (26) having a reflective surface for changing the exit angle of light from the light-emitting layer (21), and at least a part of the light-transmitting part (26) forms It is a color filter (26R, 26G, 26B). The light-transmitting part (26) has a function as a reflector for changing the exit angle of light from the light-emitting layer (21), and improves light extraction efficiency from the light-emitting layer (21) to the air layer (8). In addition, at least a part of the light-transmitting portion (26) is formed as a color filter, and therefore, the reflector and the color filter can be formed on the same layer. With this structure, a light extraction device having a reflector function and a color filter function can be obtained.

Description

technical field [0001] The present invention relates to a light extraction device provided on a display surface of a self-luminous display such as an organic electroluminescent display to improve its light extraction efficiency, a manufacturing method thereof, and a display device provided with the light extraction device. Background technique [0002] In recent years, display devices using self-luminous devices such as light emitting diodes (LEDs) and electroluminescent (EL) devices have been vigorously developed. The light emitting part of this type of self-luminous device is configured to have a higher refractive index than the air layer, which causes the inconvenience that generated light cannot be effectively extracted to the outside. Therefore, there is a need to improve light extraction efficiency. In addition, measures are taken to increase color purity and contrast. [0003] As means for increasing light extraction efficiency, a structure in which a reflector is p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/02H05B33/10H05B33/12H05B33/24H01L51/50
CPCH05B33/10H01L27/322G02B5/223H01L51/5271G02B5/201H10K59/38H10K50/856H01L21/02288H01L23/145H10K71/135
Inventor 渡边达也
Owner SONY CORP