Mirror display

Patent metadata

Field	Value
Publication number	US-10222888-B2
Application number	US-201715605742-A
Country	US
Kind code	B2
Filing date	May 25, 2017
Priority date	May 30, 2016
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

A mirror display is described. The mirror display includes a plurality of first electrodes disposed on a first substrate, a plurality of sensor lines disposed on the first substrate, the plurality of sensor lines connected to the plurality of first electrodes, a plurality of second electrodes disposed on a second substrate, the plurality of second electrodes facing the first substrate, a liquid crystal layer interposed between the plurality of first electrodes and the plurality of second electrodes, a plurality of mirror driving lines on the second substrate, the plurality of mirror driving lines connected to the plurality of second electrodes, and a reflective polarizing film attached to the second substrate.

First claim

What is claimed is:

1. A mirror display comprising:
a mirror panel including:
a first substrate;
a plurality of first electrodes on the first substrate;
a plurality of sensor lines on the first substrate, the plurality of sensor lines connected to the plurality of first electrodes;
a second substrate;
a plurality of second electrodes on the second substrate, the plurality of second electrodes facing the first substrate;
a liquid crystal layer interposed between the plurality of first electrodes and the plurality of second electrodes;
a plurality of mirror driving lines on the second substrate, the plurality of mirror driving lines connected to the plurality of second electrodes; and
a reflective polarizing film attached to the second substrate,

a mirror panel driver configured to apply a sensor driving signal to the plurality of first electrodes through the plurality of sensor lines to sense a touch on the mirror panel, and apply a mirror driving signal to the plurality of second electrodes through the plurality of mirror driving lines, the mirror driving signal selecting either a mirror mode or a display mode of the mirror panel;
a display panel on the mirror panel, the display panel configured to display an input image; and
a display panel driver configured to write data of the input image to pixels of the display panel through data lines.

2. The mirror display of claim 1 , wherein the plurality of first electrodes and the plurality of second electrodes of the mirror panel are divided into a plurality of blocks having a predetermined size.

3. The mirror display of claim 2 , wherein the mirror driving signal of the mirror mode is applied to a first set of second electrodes from the plurality of second electrodes that is included in a first block and drives the first set of second electrodes in the mirror mode, and the mirror driving signal of the display mode is applied to a second set of second electrodes from the plurality of second electrodes that is included in a second block and drives the second set of second electrodes in the display mode while the first set of second electrodes is driven in the mirror mode.

4. The mirror display of claim 3 , wherein light incident from external light is reflected on a portion of the reflective polarizing film corresponding to the first block while the first set of second electrodes is driven in the mirror mode, and
wherein light from the display panel passes through a portion of the reflective polarizing film corresponding to the second block while the second set of second electrodes is driven in the display mode.

5. The mirror display of claim 4 , wherein the mirror panel is a liquid crystal panel driven in a normally white mode.

6. The mirror display of claim 5 , wherein the mirror driving signal is in a same phase as the sensor driving signal responsive to the mirror driving signal being in the display mode, and the mirror driving signal has a phase that is reversed from a phase of the sensor driving signal responsive to the mirror driving signal being in the mirror mode.

7. The mirror display of claim 6 , wherein an alternating current (AC) signal having a same phase as the sensor driving signal is applied to the plurality of first electrodes that do not receive the sensor driving signal.

8. The mirror display of claim 1 , wherein the sensor driving signal is not generated responsive to an inversion of a polarity of the mirror driving signal.

9. The mirror display of claim 1 , further comprising:
a polarizing film attached to the first substrate.

10. A mirror display panel comprising:
a first substrate;
a plurality of first electrodes on the first substrate;
a plurality of sensor lines on the first substrate, the plurality of sensor lines connected to the plurality of first electrodes;
a second substrate;
a plurality of second electrodes on the second substrate, the plurality of second electrodes facing the first substrate;
a liquid crystal layer interposed between the plurality of first electrodes and the plurality of second electrodes;
a plurality of mirror driving lines on the second substrate, the plurality of mirror driving lines connected to the plurality of second electrodes;
a reflective polarizing film attached to the second substrate; and
a display panel on the mirror panel, the display panel configured to display an input image by writing data of the input image to pixels of the display panel via data lines.

11. The mirror display panel of claim 10 , further comprising:
a polarizing film attached to the first substrate.

12. The mirror display panel of claim 10 , wherein the plurality of first electrodes and the plurality of second electrodes of the mirror panel are divided into a plurality of blocks having a predetermined size.

13. The mirror display panel of claim 10 , wherein the mirror display panel is a liquid crystal panel driven in a normally white mode.

14. A mirror display panel comprising:
a first substrate;
a plurality of first electrodes on the first substrate;
a second substrate;
a plurality of second electrodes on the second substrate that face the first substrate, the plurality of second electrodes comprising a first set of second electrodes and a second set of second electrodes;
a liquid crystal layer interposed between the plurality of first electrodes and the plurality of second electrodes;
a plurality of mirror driving lines on the second substrate, the plurality of mirror driving lines comprising a first set of mirror driving lines and a second set of mirror driving lines, the first set of mirror driving lines connected to the first set of second electrodes, and the second set of mirror driving lines connected to the second set of second electrodes; and
a plurality of sensor lines on the first substrate, the plurality of sensor lines connected to the plurality of first electrodes,
wherein the first set of second electrodes reflect external light incident on the first set of second electrodes responsive to the first set of second electrodes receiving a mirror driving signal in a mirror mode via the first set of mirror driving lines, and
wherein the second set of second electrodes passes light received from a display panel that is on the mirror display panel while the first set of second electrodes reflects external light responsive to the second set of second electrodes receiving the mirror driving signal in a display mode via the second set of mirror driving lines.

15. The mirror display panel of claim 14 , wherein the plurality of first electrodes receive via the plurality of sensor lines a sensor driving signal for sensing a touch on the mirror display panel.

16. The mirror display panel of claim 14 , further comprising:
a polarizing film attached to the first substrate.

17. The mirror display panel of claim 14 , wherein the plurality of first electrodes and the plurality of second electrodes of the mirror panel are divided into a plurality of blocks having a predetermined size.

18. The mirror display panel of claim 17 , wherein each of the plurality of first electrodes is overlapped by a corresponding one of the plurality of second electrodes.

19. The mirror display panel of claim 14 , wherein the mirror display panel is a liquid crystal panel driven in a normally white mode.

Assignees

• Lg Display Co Ltd

Inventors

• Nam Sangjin
• Kim Kyujin
• Yoo Seungjin

Classifications

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G02F2203/66

  Normally white display, i.e. the off state being white · CPC title

• G02F1/133536

  Reflective polarizers (G02F1/13362 takes precedence) · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G02F2203/02

  reflective · CPC title