CN105676500B - Liquid crystal display device and control method thereof - Google Patents
Liquid crystal display device and control method thereof Download PDFInfo
- Publication number
- CN105676500B CN105676500B CN201610187198.8A CN201610187198A CN105676500B CN 105676500 B CN105676500 B CN 105676500B CN 201610187198 A CN201610187198 A CN 201610187198A CN 105676500 B CN105676500 B CN 105676500B
- Authority
- CN
- China
- Prior art keywords
- touch screen
- liquid crystal
- crystal display
- current signal
- display panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
Abstract
The invention discloses a liquid crystal display device, comprising: a liquid crystal display panel; a touch screen; the touch screen circuit chip is connected with the touch screen and used for detecting whether the touch screen is touched and outputting a control signal; and the power supply module is respectively connected with the touch screen circuit chip and the liquid crystal display panel and is used for providing a direct current signal or an alternating current signal for the liquid crystal display panel according to a control signal. According to the liquid crystal display device with the touch screen and the control method thereof, provided by the invention, the phenomenon of Image sticking (Image Stacking) is improved by providing the alternating current signal to the color film substrate side of the liquid crystal display panel when the touch screen is not touched, and the direct current signal is provided to the color film substrate side of the liquid crystal display panel when the touch screen is touched, so that the phenomenon of mistaken touch when the touch screen is used is avoided, and the accuracy and precision of touch are improved.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a liquid crystal display device and a control method thereof.
Background
The liquid crystal display device controls the penetration amount of light by utilizing the characteristic that liquid crystal molecules have different polarization or refraction effects on light under different arrangement states, so that the liquid crystal display device can generate images.
Generally, a Twisted Nematic (TN) liquid crystal display device used conventionally is affected by the structure and optical characteristics of liquid crystal molecules, and thus has a very narrow viewing angle. Therefore, other types of wide viewing angle liquid crystal display devices have been developed, such as: vertical Alignment (VA) liquid crystal display devices, In-plane Switching (IPS) liquid crystal displays, and Fringe Field Switching (FFS) liquid crystal displays.
Liquid crystal molecules can be classified into positive type liquid crystal molecules and negative type liquid crystal molecules based on the characteristic that the liquid crystal molecules rotate under an electric field. In general, although positive liquid crystal molecules have an advantage of a fast reaction time (response time), they have a low light transmittance. On the other hand, negative liquid crystal molecules have the disadvantage of high light transmittance but long reaction time. Therefore, in IPS and FFS liquid crystal display devices, when the liquid crystal layer is composed of negative-type liquid crystal molecules, the liquid crystal molecules having a smaller molecular weight are usually added to increase the sliding property between the negative-type liquid crystal molecules, thereby improving the above-mentioned disadvantage of a longer reaction time. However, when the liquid crystal composition composing the liquid crystal layer is heated or irradiated by external ambient light, the small molecule liquid crystal is easily cracked to generate electrons or free radicals (radial), and the generated electrons are lost from the alignment layer, so that the Voltage Holding Ratio (VHR) of the liquid crystal display device is reduced, which causes abnormal alignment, and further affects the Image stabilizing and optical performance of the liquid crystal display device.
In the conventional scheme for improving the Image sticking, an alternating current signal (ACVCOM) IS added on a color film substrate side of a liquid crystal display Panel, but along with this, Panel Noise (Panel Noise) IS also increased greatly, and for a liquid crystal display device with a Touch screen, because the increase of the Panel Noise affects the accuracy and precision of Touch, the liquid crystal display device cannot simultaneously use an IS Touch screen and a Touch screen, and the actual value of a product IS affected.
Disclosure of Invention
The invention aims to provide a liquid crystal display device and a control method thereof.
According to an aspect of the present invention, there is provided a liquid crystal display device including: a liquid crystal display panel; a touch screen; the touch screen circuit chip is connected with the touch screen and used for detecting whether the touch screen is touched and outputting a control signal; the power supply module is respectively connected with the touch screen circuit chip and the liquid crystal display panel and used for providing a direct current signal or an alternating current signal to the liquid crystal display panel according to a control signal; the touch screen circuit chip is used for generating a first control signal when detecting that the touch screen is touched and generating a second control signal when detecting that the touch screen is not touched; the power supply module is used for providing a direct current signal for the liquid crystal display panel according to the first control signal and providing an alternating current signal for the liquid crystal display panel according to the second control signal.
Preferably, the liquid crystal display panel includes an array substrate and a color film substrate which are oppositely arranged, and a metal layer is arranged above the color film substrate.
Preferably, the power supply module is connected to a metal layer disposed on the color film substrate, and is configured to provide a direct current signal or an alternating current signal to the metal layer.
Preferably, the power supply module includes a power supply unit and a selection unit, wherein the power supply unit is configured to generate a dc signal and an ac signal, and the selection unit is configured to control the power supply unit to provide the dc signal or the ac signal to the liquid crystal display panel according to the control signal.
Preferably, the touch screen circuit chip generates a first control signal when detecting that the sensing capacitance on the touch screen continuously changes and the sensing capacitance change time is less than a preset threshold value.
Preferably, the first control signal is at a high level, and the second control signal is at a low level.
According to another aspect of the present invention, there is provided a method of controlling a liquid crystal display device, including: the touch screen circuit chip generates a first control signal when detecting that the touch screen is touched, and generates a second control signal when detecting that the touch screen is not touched; the power supply module provides a direct current signal for the liquid crystal display panel according to the first control signal and provides an alternating current signal for the liquid crystal display panel according to the second control signal.
Preferably, the liquid crystal display panel includes an array substrate and a color film substrate which are oppositely arranged, and a metal layer is arranged above the color film substrate.
Preferably, the power supply module provides a direct current signal or an alternating current signal to a metal layer arranged on the color film substrate.
Preferably, the touch screen circuit chip generates a first control signal when detecting that the induced capacitance on the touch screen continuously changes and the change time of the induced capacitance is less than a preset threshold, where the first control signal is at a high level and the second control signal is at a low level.
According to the liquid crystal display device with the touch screen and the control method thereof, provided by the invention, the phenomenon of Image sticking (Image Stacking) is improved by providing the alternating current signal to the color film substrate side of the liquid crystal display panel when the touch screen is not touched, and the direct current signal is provided to the color film substrate side of the liquid crystal display panel when the touch screen is touched, so that the phenomenon of mistaken touch when the touch screen is used is avoided, and the accuracy and precision of touch are improved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic view showing a structure of a liquid crystal display device according to an embodiment of the present invention;
FIG. 2 shows a schematic diagram of a liquid crystal display panel according to an embodiment of the present invention;
fig. 3 shows a control flowchart of the liquid crystal display device according to the embodiment of the present invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
The present invention may be embodied in various forms, some examples of which are described below.
Fig. 1 shows a schematic configuration diagram of a liquid crystal display device according to an embodiment of the present invention. As shown in fig. 1, the liquid crystal display device includes a liquid crystal display panel 10, a touch panel 11, a touch panel circuit chip 12, and a power supply module 13.
As shown in fig. 2, the liquid crystal display panel 10 includes an array substrate 101 and a Color Filter substrate (Color Filter)102, which are oppositely disposed, and a metal layer 103 is disposed above the Color Filter substrate 102.
In this embodiment, the touch screen 11 may be separately disposed above the liquid crystal display panel 10, or may be integrated in the liquid crystal display panel 10.
The touch screen circuit chip 12 is connected to the touch screen 11, and is configured to detect whether the touch screen 11 is touched and output a control signal.
In this embodiment, the touch screen circuit chip 12 determines whether the touch screen 11 is touched by detecting whether the sensing capacitance of the touch screen changes, generates a first control signal when detecting that the touch screen 11 is touched, and generates a second control signal when detecting that the touch screen 11 is not touched.
In a preferred embodiment, the first control signal is at a high level and the second control signal is at a low level. The touch screen circuit chip 12 generates a first control signal when detecting that the sensing capacitance on the touch screen 11 continuously changes and the sensing capacitance change time is less than a preset threshold value. Wherein the preset threshold may be 10 μ s.
And the power supply module 13 is respectively connected with the touch screen circuit chip 12 and the liquid crystal display panel 10, and is used for providing a direct current signal or an alternating current signal to the liquid crystal display panel 10 according to a control signal.
In this embodiment, the power supply module 13 is connected to a metal layer 103 disposed on the color filter substrate 102, and is configured to provide a direct current signal or an alternating current signal to the metal layer 103.
The power supply module 13 provides a dc signal to the liquid crystal display panel 10 according to the first control signal, and provides an ac signal to the liquid crystal display panel 10 according to the second control signal.
In a preferred embodiment, the power supply module 13 includes a selection unit 131 and a power supply unit 132, wherein the power supply unit 132 is configured to generate a dc signal and an ac signal, and the selection unit 131 is configured to control the power supply unit 132 to provide the dc signal or the ac signal to the liquid crystal display panel 10 according to the control signal.
According to the liquid crystal display device with the touch screen, provided by the invention, the phenomenon of Image sticking (Image Stacking) is improved by providing the alternating current signal to the color film substrate side of the liquid crystal display panel when the touch screen is not touched, and the direct current signal is provided to the color film substrate side of the liquid crystal display panel when the touch screen is touched, so that the phenomenon of mistaken touch when the touch screen is used is avoided, and the accuracy and precision of touch are improved.
Fig. 3 shows a control flowchart of the liquid crystal display device according to the embodiment of the present invention. As shown in fig. 3, the control method includes the following steps.
In step S01, the touch screen circuit chip generates a first control signal when detecting that the touch screen is touched, and generates a second control signal when detecting that the touch screen is not touched.
In this embodiment, as shown in fig. 2, the liquid crystal display panel 10 includes an array substrate 101 and a Color Filter substrate (Color Filter)102, which are oppositely disposed, and a metal layer 103 is disposed above the Color Filter substrate 102. The touch screen 11 may be separately disposed above the liquid crystal display panel 10, or may be integrated in the liquid crystal display panel 10.
The touch screen circuit chip 12 is connected to the touch screen 11, and is configured to detect whether the touch screen 11 is touched and output a control signal.
In this embodiment, the touch screen circuit chip 12 determines whether the touch screen 11 is touched by detecting whether the sensing capacitance of the touch screen changes, generates a first control signal when detecting that the touch screen 11 is touched, and generates a second control signal when detecting that the touch screen 11 is not touched.
In a preferred embodiment, the first control signal is at a high level and the second control signal is at a low level. The touch screen circuit chip 12 generates a first control signal when detecting that the sensing capacitance on the touch screen 11 continuously changes and the sensing capacitance change time is less than a preset threshold value. Wherein the preset threshold may be 10 μ s.
In step S02, the power supply module provides a dc signal to the liquid crystal display panel according to the first control signal, and provides an ac signal to the liquid crystal display panel according to the second control signal.
In this embodiment, the power supply module 13 is connected to a metal layer 103 disposed on the color filter substrate 102, and is configured to provide a direct current signal or an alternating current signal to the metal layer 103.
The power supply module 13 provides a dc signal to the liquid crystal display panel 10 according to the first control signal, and provides an ac signal to the liquid crystal display panel 10 according to the second control signal.
According to the control method of the liquid crystal display device, when the touch screen 11 is not touched, an alternating current signal is provided to the color film substrate side of the liquid crystal display panel, so that the Image stabilizing (Image stabilizing) phenomenon is improved, and when the touch screen 11 is touched, a direct current signal is provided to the color film substrate side of the liquid crystal display panel, so that the phenomenon of mistaken touch when the touch screen is used is avoided, and the accuracy and precision of touch are improved.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The scope of the invention should be determined from the following claims.
Claims (2)
1. A liquid crystal display device comprising:
the liquid crystal display panel comprises an array substrate and a color film substrate which are oppositely arranged, wherein a metal layer is arranged above the color film substrate;
a touch screen;
the touch screen circuit chip is connected with the touch screen and used for detecting whether the touch screen is touched and outputting a high level or a low level;
the power supply module is respectively connected with the touch screen circuit chip and the metal layer;
the touch screen circuit chip generates a high level when detecting that the inductive capacitance on the touch screen continuously changes and the change time of the inductive capacitance is less than a preset threshold value, and generates a low level when detecting that the touch screen is not touched;
the power supply module comprises a power supply unit and a selection unit, wherein the power supply unit is used for generating a direct current signal and an alternating current signal, and the selection unit is used for controlling the power supply unit to provide the direct current signal or the alternating current signal for the metal layer according to the high level or the low level.
2. A control method of a liquid crystal display device is provided, wherein a liquid crystal display panel comprises an array substrate and a color film substrate which are oppositely arranged, a metal layer is arranged above the color film substrate, and the control method comprises the following steps:
the touch screen circuit chip generates a high level when detecting that the touch screen is touched, and generates a low level when detecting that the touch screen is not touched;
the power supply module provides a direct current signal to the metal layer according to the high level and provides an alternating current signal to the metal layer according to the low level;
the touch screen circuit chip generates a high level when detecting that the inductive capacitance on the touch screen continuously changes and the inductive capacitance change time is less than a preset threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610187198.8A CN105676500B (en) | 2016-03-29 | 2016-03-29 | Liquid crystal display device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610187198.8A CN105676500B (en) | 2016-03-29 | 2016-03-29 | Liquid crystal display device and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105676500A CN105676500A (en) | 2016-06-15 |
| CN105676500B true CN105676500B (en) | 2020-12-29 |
Family
ID=56224482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610187198.8A Active CN105676500B (en) | 2016-03-29 | 2016-03-29 | Liquid crystal display device and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105676500B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652930B (en) * | 2016-10-19 | 2019-03-26 | 厦门天马微电子有限公司 | Display panel and its data drive circuit and display device |
| CN114327113A (en) | 2020-09-30 | 2022-04-12 | 京东方科技集团股份有限公司 | Display touch apparatus and control method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0756733B1 (en) * | 1995-02-22 | 2002-09-18 | Koninklijke Philips Electronics N.V. | Low-cost resistive tablet with touch and stylus functionality |
| JP3129303B2 (en) * | 1999-02-10 | 2001-01-29 | 日本電気株式会社 | Active matrix liquid crystal display device and control method thereof |
| JP2012234080A (en) * | 2011-05-06 | 2012-11-29 | Japan Display East Co Ltd | Display device |
| KR101441957B1 (en) * | 2012-05-24 | 2014-09-18 | 엘지디스플레이 주식회사 | In-cell touch type liquid crystal display device and method for driving thereof |
| CN104281321A (en) * | 2014-09-24 | 2015-01-14 | 宇昶半导体股份有限公司 | Driving method of projective touch panel |
| CN105044971B (en) * | 2015-08-27 | 2018-11-23 | 昆山龙腾光电有限公司 | Liquid crystal display device |
-
2016
- 2016-03-29 CN CN201610187198.8A patent/CN105676500B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105676500A (en) | 2016-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10175803B2 (en) | Touch sensing device and method for driving the same | |
| US20170168633A1 (en) | Touch sensitive active privacy screen | |
| JP5633565B2 (en) | Active touch system | |
| TWI245252B (en) | LCD and the touch-control method thereof | |
| KR102146588B1 (en) | Method for driving touch sensor to achieve faster sensor settling | |
| US9229590B2 (en) | Display device | |
| EP2728404A2 (en) | Liquid crystal lens device and method of driving the same | |
| US10867573B2 (en) | Common voltage control circuit and method, display panel and display device | |
| CN101907794A (en) | Touch panel, display panel and display unit | |
| KR101996658B1 (en) | Stereoscopic Image Display Device and Driving Method the same | |
| CN102629446A (en) | Display panel, operation and control method thereof and display device | |
| CN105676500B (en) | Liquid crystal display device and control method thereof | |
| US9323403B2 (en) | Capacitive touch LCD panel | |
| US10101850B2 (en) | Display device and input device | |
| CN105700217A (en) | A polarizer, a liquid crystal display screen and an electronic apparatus | |
| CN107203062B (en) | A kind of capacitive touch liquid crystal display panel | |
| US20150169128A1 (en) | Touch display apparatus | |
| CN106681578A (en) | Touch panel, touch detection device and touch detection method | |
| US20140184522A1 (en) | Touch-sensitive display panel | |
| Haga et al. | 45.1: Touch Panel Embedded IPS‐LCD with Parasitic Current Reduction Technique | |
| US10222920B2 (en) | Touch panel device | |
| KR101653721B1 (en) | Method for calibrating touch input sensing error caused by stray capacitance on image pixel | |
| JP7415112B2 (en) | incell touch panel | |
| CN207965858U (en) | A kind of novel GX-cell capacitive touch screens module | |
| US10732758B2 (en) | Touchscreen communication interface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Applicant after: Kunshan Longteng Au Optronics Co Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Applicant before: Kunshan Longteng Optronics Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |