DISPLAY PANEL, INPUT/OUTPUT PANEL, AND DATA PROCESSING DEVICE

• US 20170285404A1
• Filed: 03/27/2017
• Published: 10/05/2017
• Est. Priority Date: 03/30/2016
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: KUBOTA, Daisuke, NAKANO, Masaru, MIYAKE, Hiroyuki
• Granted Patent: US 10,520,768 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 2201/44 Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers

Abstract

A novel display panel that is highly convenient or reliable is provided. A novel input/output panel that is highly convenient or reliable is provided. A novel data processing device that is highly convenient or reliable is provided. The display panel includes a layer containing a liquid crystal material, a first pixel, a second pixel, and an anti-reflection structure. The layer containing a liquid crystal material includes a first region, a second region, and a third region. The first pixel includes the first region. The second pixel includes the second region. The anti-reflection structure includes a region overlapping with the third region. The anti-reflection structure has a function of reducing reflectance of visible light which enters through the layer containing a liquid crystal material.

Claims

1. A display panel comprising:

a first layer containing a liquid crystal material;

a first pixel;

a second pixel; and

an anti-reflection structure,

wherein the first layer comprises a first region, a second region, and a third region,

wherein the third region comprises a region positioned between the first region and the second region,

wherein the first pixel comprises the first region,

wherein the second pixel comprises the second region,

wherein the anti-reflection structure comprises a region overlapping with the third region, and

wherein the anti-reflection structure is configured to reduce reflectance of visible light which enters through the first layer.

2. The display panel according to claim 1,

wherein the anti-reflection structure comprises a transflective film, a reflective film, and an optical adjustment film,

wherein the reflective film comprises a region overlapping with the transflective film,

wherein the optical adjustment film comprises a region positioned between the transflective film and the reflective film,

wherein the transflective film is configured to transmit a first part of visible light and reflect a second part of visible light,

wherein the reflective film is configured to reflect the first part of visible light,

wherein the optical adjustment film is configured to transmit the first part of visible light, and

wherein the optical adjustment film has a thickness which allows a phase of the first part of visible light reflected by the reflective film to be adjusted so that the second part of visible light reflected by the transflective film is canceled out.

3. The display panel according to claim 1, further comprising a coloring film,

wherein the coloring film comprises a region positioned between the anti-reflection structure and the third region or a region positioned so that the third region is positioned between the coloring film and the anti-reflection structure, and

wherein the coloring film is configured to absorb the second part of visible light.

4. The display panel according to claim 1,

wherein the first pixel comprises a first display element,

wherein the second pixel comprises a sixth display element,

wherein the first display element comprises a first electrode and a second electrode,

wherein the sixth display element comprises a fifth electrode and the second electrode,

wherein the first electrode is positioned so that an electric field for controlling an alignment of the liquid crystal material contained in the first region is generated between the first electrode and the second electrode,

wherein the fifth electrode is positioned so that an electric field for controlling an alignment of the liquid crystal material contained in the second region is generated between the fifth electrode and the second electrode, and

wherein the first display element and the sixth display element have a same structure.

5. The display panel according to claim 1,

wherein the first region is positioned between the second electrode and the first electrode, and

wherein the second region is positioned between the second electrode and the fifth electrode.

18. The display panel according to claim 1, further comprising:

a first group of pixels;

a second group of pixels;

a scan line; and

a signal line,

wherein the first group of pixels comprise the first pixel,

wherein the first group of pixels are positioned in a row direction,

wherein the second group of pixels comprise the first pixel,

wherein the second group of pixels are positioned in a column direction that intersects the row direction,

wherein the scan line is electrically connected to the first group of pixels, and

wherein the signal line is electrically connected to the second group of pixels.

19. An input/output panel, comprising:

the display panel according to claim 1; and

an input portion,

wherein the input portion is configured to sense an object that approaches a region overlapping with the display panel.

20. The input/output panel according to claim 19,

wherein the input portion comprises the region overlapping with the display panel,

wherein the input portion comprises a control line, a sensing signal line, and a sensing element,

wherein the sensing element is electrically connected to the control line and the sensing signal line,

wherein the control line is configured to supply a control signal,

wherein the sensing element receives the control signal,

wherein the sensing element is configured to supply a sensing signal which changes in accordance with the control signal and a distance between the sensing element and the object approaching the region overlapping with the display panel,

wherein the sensing signal line is configured to receive the sensing signal,

wherein the sensing element has a light-transmitting property,

wherein the sensing element comprises a first electrode and a second electrode,

wherein the first electrode is electrically connected to the control line,

wherein the second electrode is electrically connected to the sensing signal line, and

wherein the second electrode is positioned so that an electric field part of which is blocked by the object approaching the region overlapping with the display panel is generated between the second electrode and the first electrode.

21. A data processing device, comprising:

at least one of a keyboard, a hardware button, a pointing device, a touch sensor, an illuminance sensor, an imaging device, an audio input device, a viewpoint input device, and an attitude determination device, and

the display panel according to claim 1.

6. A display panel comprising:

a first layer containing a liquid crystal material;

a first pixel;

a second pixel; and

an anti-reflection structure,

wherein the first layer comprises a first region, a second region and a third region,

wherein the third region comprises a region positioned between the first region and the second region,

wherein the first pixel comprises the first region,

wherein the second pixel comprises the second region,

wherein the anti-reflection structure comprises a region overlapping with the third region, and

wherein the anti-reflection structure is configured to reduce reflectance of visible light which enters through the first layer,

wherein the anti-reflection structure comprises a transflective film, a reflective film, and an optical adjustment film,

wherein the reflective film comprises a region overlapping with the transflective film,

wherein the optical adjustment film comprises a region positioned between the transflective film and the reflective film,

wherein the transflective film is configured to transmit a first part of visible light and reflect a second part of visible light,

wherein the reflective film is configured to reflect the first part of visible light, wherein the optical adjustment film is configured to transmit the first part of visible light, and

wherein the optical adjustment film has a thickness which allows a phase of the first part of visible light reflected by the reflective film to be adjusted so that the second part of visible light reflected by the transflective film is canceled out.

7. The display panel according to claim 6, further comprising a coloring film,

wherein the coloring film comprises a region positioned between the anti-reflection structure and the third region or a region positioned so that the third region is positioned between the coloring film and the anti-reflection structure, and

wherein the coloring film is configured to absorb the second part of visible light.

8. The display panel according to claim 6,

wherein the first pixel comprises a first display element,

wherein the second pixel comprises a sixth display element,

wherein the first display element comprises a first electrode and a second electrode,

wherein the sixth display element comprises a fifth electrode and the second electrode,

wherein the first electrode is positioned so that an electric field for controlling an alignment of the liquid crystal material contained in the first region is generated between the first electrode and the second electrode,

wherein the fifth electrode is positioned so that an electric field for controlling an alignment of the liquid crystal material contained in the second region is generated between the fifth electrode and the second electrode, and

wherein the first display element and the sixth display element have a same structure.

9. The display panel according to claim 6,

wherein the first region is positioned between the second electrode and the first electrode, and

wherein the second region is positioned between the second electrode and the fifth electrode.

10. The display panel according to claim 6,

wherein the first pixel comprises a second display element,

wherein the second display element comprises a third electrode, a fourth electrode, and a second layer containing a light-emitting material,

wherein the third electrode comprises the transflective film,

wherein the fourth electrode comprises the reflective film, and

wherein the optical adjustment film comprises the second layer.

11. The display panel according to claim 6, wherein the second display element is positioned so that display using the second display element can be seen in a region in which display using the first display element can be seen.

12. The display panel according to claim 6, wherein the second display element is configured to display a color different from a color displayed by the first display element.

13. A display panel comprising:

a first layer containing a liquid crystal material;

a first pixel;

a second pixel; and

an anti-reflection structure,

wherein the first layer comprises a first region, a second region, and a third region,

wherein the third region comprises a region positioned between the first region and the second region,

wherein the first pixel comprises the first region,

wherein the second pixel comprises the second region,

wherein the anti-reflection structure comprises a region overlapping with the third region,

wherein the anti-reflection structure is configured to reduce reflectance of visible light which enters through the first layer,

wherein the first pixel comprises a second display element, a third display element, a fourth display element, and a fifth display element,

wherein the second display element comprises a third electrode, a fourth electrode, and a second layer containing a light-emitting material,

wherein the third electrode comprises a transflective film,

wherein the fourth electrode comprises a reflective film,

wherein the third display element is positioned so that display using the third display element can be seen in a region in which display using the first display element can be seen,

wherein the fourth display element is positioned so that display using the fourth display element can be seen in a region in which display using the first display element can be seen,

wherein the fifth display element is positioned so that display using the fifth display element can be seen in a region in which display using the first display element can be seen,

wherein each of colors displayed by the first display element, the second display element, the third display element, the fourth display element and the fifth display element are different from each other,

wherein the first display element is configured to display white, and

wherein each of the second display element, the third display element, the fourth display element and the fifth display element is configured to display blue, green, red, or white.

14. The display panel according to claim 13, wherein the second display element is positioned so that display using the second display element can be seen in a region in which display using the first display element can be seen.

15. The display panel according to claim 13, wherein the second display element is configured to display a color different from a color displayed by the first display element.

16. The display panel according to claim 13, further comprising:

a first conductive film;

a second conductive film;

a second insulating film; and

a pixel circuit,

wherein the first conductive film is electrically connected to the first electrode,

wherein the second conductive film comprises a region overlapping with the first conductive film,

wherein the second insulating film comprises a region positioned between the first conductive film and the second conductive film,

wherein the second insulating film comprises an opening,

wherein the second conductive film is electrically connected to the first conductive film in the opening,

wherein the pixel circuit is electrically connected to the second conductive film,

wherein the third electrode is electrically connected to the pixel circuit, and

wherein the second display element is configured to emit light toward the second insulating film.

17. The display panel according to claim 13, further comprising:

an optical adjustment film in the anti-reflection structure,

wherein the optical adjustment film comprises the second layer.