ORGANIC EL DISPLAY DEVICE

• US 20190312230A1
• Filed: 08/10/2017
• Published: 10/10/2019
• Est. Priority Date: 08/18/2016
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: OCHI, Takashi, ISHIDA, Mamoru, SONODA, Tohru, SENOO, Tohru, HIRASE, Takeshi
• Granted Patent: US 10,826,019 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: G02B 5/20 Filters polarising elements G02B5/30
• CPC Class Codes: G09F 9/30 in which the desired character or characters are formed by combining individual elements panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00
• CPC Class Codes: H05B 33/02 Details
• CPC Class Codes: H05B 33/04 Sealing arrangements , e.g. against humidity
• CPC Class Codes: H05B 33/12 Light sources with substantially two-dimensional radiating surfaces
• CPC Class Codes: H10K 2101/00 Properties of the organic materials covered by group H10K85/00
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/00 Organic light-emitting devices integrated devices or assemblies of multiple devices H10K59/00, H10K65/00; organic semiconductor lasers H01S5/36
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

A display device includes: a plurality of organic layers each made of an organic material and each having a predetermined modulus of elasticity and a predetermined thickness; and a plurality of inorganic layers each made of an inorganic material and each having a predetermined modulus of elasticity and a predetermined thickness. The plurality of organic layers and the plurality of inorganic layers are stacked together to constitute a device body which forms the display device. A quotient obtained by dividing the sum of flexural rigidities of the plurality of inorganic layers by the sum total of the sum of flexural rigidities of the plurality of organic layers and the sum of the flexural rigidities of the plurality of inorganic layers is 0.78 or higher and 1 or lower.

Claims

1-10. -10. (canceled)

11. A display device comprising:

a plurality of organic layers each made of an organic material and each having a predetermined modulus of elasticity and a predetermined thickness; and

a plurality of inorganic layers each made of an inorganic material and each having a predetermined modulus of elasticity and a predetermined thickness,

the plurality of organic layers and the plurality of inorganic layers being stacked together to constitute a device body which forms the display device, wherein

a quotient obtained by dividing a sum of flexural rigidities of the plurality of inorganic layers by a sum total of a sum of flexural rigidities of the plurality of organic layers and the sum of the flexural rigidities of the plurality of inorganic layers is 0.78 or higher and 1 or lower.

12. The display device of claim 11, wherein

the quotient obtained by dividing the sum of the plurality of the flexural rigidities of the plurality of inorganic layers by the sum total of the sum of the flexural rigidities of the plurality of organic layers and the sum of the flexural rigidities of the plurality of inorganic layers, is 0.83 or higher and 1 or lower.

13. The display device of claim 11, the device satisfying Expression 1

[Exp. 1]

14. The display device of claim 13, wherein

the one organic or inorganic layer constituting the i-th layer has a flexural rigidity Eili satisfying an expression:

Eili=bEi{(hi−

λ

)3−

(hi−

1−

λ

)3}/3,

wherein b is a width of the device body, the width being parallel to a center axis of a radius of bend of the device body.

15. The display device of claim 11, wherein

the plurality of inorganic layers includes a hard coat constituting the one surface of the device body.

16. The display device of claim 15, wherein

the hard coat has the highest flexural rigidity of the plurality of inorganic layers.

17. The display device of claim 11, wherein

the plurality of inorganic layers includes a rigidifying layer constituting the other surface of the device body.

18. The display device of claim 17, wherein

the rigidifying layer has the second highest flexural rigidity of the plurality of inorganic layers.

19. The display device of claim 11, wherein,

the device body includes a display panel which has a color filter, and a touch panel which is stacked on the display panel.

20. The display device of claim 11, wherein,

the device body includes a display panel including a color filter and a touch panel.

21. The display device of claim 19, wherein

the display panel is an organic EL display panel.

22. The display device of claim 20, wherein

the display panel is an organic EL display panel.