LIQUID CRYSTAL DISPLAY DEVICE

• US 20160103358A1
• Filed: 10/06/2015
• Published: 04/14/2016
• Est. Priority Date: 10/09/2014
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: TANAKA, Toshihiko
• Granted Patent: US 9,715,299 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133382 Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer

Abstract

According to an aspect, a liquid crystal display device includes: a liquid crystal display unit that displays an image; a plurality of electrodes arranged in the liquid crystal display unit in parallel with one direction along a display surface of the liquid crystal display unit; a measuring unit that measures electric resistance values of the electrodes; a specifying unit that specifies a temperature of the liquid crystal display unit based on the electric resistance values of the electrodes; and an application unit that applies, to the electrodes, a voltage for causing the electrode to generate heat based on the temperature of the liquid crystal display unit.

Claims

1. A liquid crystal display device comprising:

a liquid crystal display unit that displays an image;

a plurality of electrodes arranged in the liquid crystal display unit in parallel with one direction along a display surface of the liquid crystal display unit;

a measuring unit that measures electric resistance values of the electrodes;

a specifying unit that specifies a temperature of the liquid crystal display unit based on the electric resistance values of the electrodes; and

an application unit that applies, to the electrodes, a voltage for causing the electrode to generate heat based on the temperature of the liquid crystal display unit.

2. The liquid crystal display device according to claim 1, further comprising:

a touch detection unit that detects proximity or contact of an object with respect to the display surface based on a change in capacitance of each of the electrodes.

3. The liquid crystal display device according to claim 2, further comprising:

a control unit that assigns an application time of a voltage applied by the application unit and a touch detecting time by the touch detection unit in a time division manner according to the temperature of the liquid crystal display unit.

4. The liquid crystal display device according to claim 2, wherein

the touch detection unit is electrically coupled to the electrode via at least one coupling part, and

the application unit is electrically coupled to the electrodes via two coupling parts including the at least one coupling part.

5. The liquid crystal display device according to claim 1, further comprising:

an operation control unit that causes the liquid crystal display unit to end display of the image when the temperature of the liquid crystal display unit is equal to or higher than a certain temperature.