Rollable display panel and rollable display device having the same

Patent metadata

Field	Value
Publication number	US-10908757-B2
Application number	US-201916709761-A
Country	US
Kind code	B2
Filing date	Dec 10, 2019
Priority date	Oct 19, 2016
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

A rollable display panel and a rollable display device, the rollable display panel including a display region configured to display an image; a non-display region surrounding the display region; and a resistor sensor in the non-display region including sensing material of which resistance values are different by location, wherein the resistor sensor outputs a sensing signal that is regularly changed proportional to a rolling length of the rollable display panel, and a sensor driver that determines a driving region of the rollable display panel based on the sensing signal.

First claim

What is claimed is:

1. A display device, comprising:
a rollable display panel including a display region and a non-display region adjacent to the display region;
a sensor in the non-display region, wherein the sensor outputs a sensing signal which is changed according to rolling degree of the rollable display panel; and
a sensor driver that determines a driving region of the rollable display panel based on the sensing signal,
wherein:
the sensor includes a sensing pattern,
the sensing signal is a resistance value of the sensing pattern, and
the resistance value changes according to a pressure applied thereto.

2. The display device as claimed in claim 1 , wherein the sensing signal is changed proportional to the rolling degree of the rollable display panel.

3. The display device as claimed in claim 1 , wherein the sensor further includes a first electrode and a second electrode coupled to ends of the sensing pattern.

4. The display device as claimed in claim 1 , wherein width or thickness of the sensing pattern varies according to a location along a length direction of the sensor.

5. The display device as claimed in claim 1 , wherein the resistance value of the sensing pattern of the sensor decreases as a curvature of the rollable display panel increases.

6. The display device as claimed in claim 1 , wherein the sensor driver comprises:
a voltage provider configured to provide a reference voltage to the sensor;
an analog-digital converter configured to convert a voltage output from the sensor to a detecting signal that is a digital signal; and
a region controller configured to control a driving region of the rollable display panel based on the detecting signal.

7. The display device of claim 6 , further comprising a touch panel on the rollable display panel, and
wherein the region controller controls an operation region of the touch panel.

Assignees

• Samsung Display Co Ltd

Inventors

• Hong Won-Ki
• Seo Young-Jun
• Lee Tae-Hee

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• G09F9/301 Primary

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title

• G06F1/1641

  the display being formed by a plurality of foldable display components (G06F1/1647 takes precedence) · CPC title

• G01B7/026 Primary

  for measuring length of cable, band or the like, which has been paid out, e.g. from a reel (measuring length of objects while moving G01B7/04) · CPC title

• G06F1/1652

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title