Display panel and information processing device

• US 10,020,350 B2
• Filed: 07/07/2016
• Issued: 07/10/2018
• Est. Priority Date: 03/23/2015
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei, Hirakata, Yoshiharu, Ishitani, Tetsuji, Okazaki, Kenichi, Kimura, Hajime
• Primary Examiner(s): Mehmood, Jennifer
• Assistant Examiner(s): Abebe, Sosina
• Application Number:
  US15/203,934
• Publication Number:
  US 20160358986A1
• Time in Patent Office: 733 Days
• CPC Class Codes: G02F 1/13306 Circuit arrangements or driving methods for the control of single liquid crystal cells G02F1/132, G02F1/133382 take precedence
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/133626 providing two modes of illumination, e.g. day-night
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/44 Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: H01L 29/7869 having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/50 OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements

Abstract

A novel display panel that can be used as a reflective display panel in an environment with strong external light and as a self-luminous display panel in a dim environment, for example and that has low power consumption and is highly convenient or reliable is provided. The display panel includes a pixel and a substrate that supports the pixel. The pixel includes a first display element (e.g., a reflective liquid crystal element) that includes a reflective film having an opening as a first conductive film and a second display element (e.g., an organic EL element) that emits light to the opening.

Claims

1. A method of manufacturing a display device comprising:

preparing an EL panel supported by a process substrate, the EL panel comprising a light emitting element and a first transistor electrically connected to the light emitting element;

preparing a liquid crystal panel supported by a substrate, the liquid crystal panel comprising a liquid crystal element and a second transistor electrically connected to the liquid crystal element;

separating the process substrate from the EL panel to expose an insulating film which covers the light emitting element; and

attaching the EL panel from which the process substrate separated to the liquid crystal panel with a bonding layer therebetween,

wherein the EL panel is attached to the liquid crystal panel so that the light emitting element and the liquid crystal element overlap with each other.

2. The method according to claim 1, wherein the first transistor comprises a channel region which comprises an oxide semiconductor.

3. The method according to claim 1, wherein the EL panel is attached to the liquid crystal panel by attaching the exposed insulating film to the bonding layer.

4. The method according to claim 1, further comprising the step of:

transferring the EL panel onto a flexible panel to make the separated EL panel after separating the process substrate from the EL panel.

5. The method according to claim 1, wherein the liquid crystal element is a reflective liquid crystal element.