DISPLAY DEVICE HAVING TOUCH SCREEN PANEL

• US 20120133599A1
• Filed: 11/01/2011
• Published: 05/31/2012
• Est. Priority Date: 11/25/2010
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: CHO, Namkyun, KWON, Keuksang, PARK, Jaehyun
• Granted Patent: US 9,804,700 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads

Abstract

A display device having a display panel and a touch screen panel is disclosed. The display device includes a display panel driving unit formed on a portion of the rear of the display panel and including a plurality of display panel driving circuits to drive the display panel; a touch screen panel driving unit formed on other portion of the rear of the display panel to be adjacent to the display panel driving unit and including a plurality of touch screen panel driving circuits to drive the touch screen panel; and a connector formed on the display panel driving unit and including a first connector unit connected to at least one of the display panel driving circuits and a second connector unit connected to at least one of the touch screen panel driving circuits.

Claims

1. A display device having a display panel and a touch screen panel, comprising:

a display panel driving unit on a portion of the rear of the display panel and including display panel driving circuits to drive the display panel;

a touch screen panel driving unit on a portion of the rear of the display panel to be adjacent to the display panel driving unit and including a touch screen panel driving circuits to drive the touch screen panel; and

a connector on the display panel driving unit and including a first connector unit connected to at least one of display panel driving circuits and a second connector unit connected to at least one of touch screen panel driving circuits.

2. The display device as claimed in claim 1, wherein the connector is used TO transmit and receive signals between the display panel and a main system and between the touch screen panel and the main system.

3. The display device according to claim 1, wherein the connector unit comprises a low voltage differential signaling connector.

4. The display device as claimed in claim 1, wherein the display panel driving unit and the touch screen panel driving unit are included in a device driving unit.

5. The display device as claimed in claim 1, further comprising a separating region for separating the display panel driving unit and the touch screen panel driving unit, and wherein the device driving unit is disposed on the rear surface of the display device.

6. The display device according to claim 1, wherein the second connector unit includes dummy pins of the low voltage differential signaling connector.

7. The display device according to claim 1, wherein the touch screens panel driving circuit comprises:

a first conductive pattern driving circuit, which supplies pulse voltage supplied from a power supply unit to a plurality of first conductive patterns arranged in a first direction with regard to the touch screen panel to scan the plurality of first conductive patterns; and

a second conductive pattern driving circuit, which supplies the pulse voltage supplied from the power supply unit to a plurality of second conductive patterns arranged in a second direction cross over the first direction in such a way to be electrically insulated from the plurality of first conductive patterns; and

scanning the plurality of second conductive patterns.

8. The display device according to claim 7, wherein the display panel driving circuit comprises:

a data driving unit, which supplies video data voltage to the data lines of the display panel;

a gate driving unit, which supplies a gate pulse synchronized with the video data voltage to the gate lines of the display panel;

a timing controller, which controls the operating timing of the data driving unit and the gate driving unit based on the timing signal supplied from the outside;

a compensating circuit, which detects common voltage having induced voltage component induced at the common electrode of the display panel by the pulse voltage, supplies another pulse voltage of the same size but in opposite phase with an induction voltage component induced by the pulse voltage, removes the induction voltage component from the common voltage having the induction voltage component, and supplies another common voltage in which the induction voltage component is removed to the common electrode.

9. The display device according to claim 8, wherein the touch screen panel driving circuit further comprises:

a touch controller, which generates a plurality of scanning control signals for controlling the first and the second conductive pattern driving circuits to supply the scanning control signals to the first and second inductive pattern driving circuits; and

a touch processor connected to the first and the second conductive patterns and which compares voltage of initial capacitance with voltage of current capacitance of each conductive pattern whenever the pulse voltage is supplied from the first and the second conductive pattern driving circuits to the first and the second conductive patterns, thereby providing the touch controller with a touch recognition signal, a touch non-recognition signal, and a touch position indicating whether to perform a touch operation.