CN107219653B - Liquid crystal display device and driving module for switching wide and narrow visual angles thereof - Google Patents
Liquid crystal display device and driving module for switching wide and narrow visual angles thereof Download PDFInfo
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- CN107219653B CN107219653B CN201710620243.9A CN201710620243A CN107219653B CN 107219653 B CN107219653 B CN 107219653B CN 201710620243 A CN201710620243 A CN 201710620243A CN 107219653 B CN107219653 B CN 107219653B
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- 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
- G02F1/1323—Arrangements for providing a switchable viewing angle
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- 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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- Optics & Photonics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a liquid crystal display device and a driving module for switching wide and narrow visual angles thereof, wherein the driving module comprises: the device comprises a visual angle data generation module, a digital-to-analog conversion module and a power supply module; the power supply module is used for supplying power to the visual angle data generation module and the digital-to-analog conversion module; the visual angle data generation module is used for extracting sub-pixel visual angle data of the visual angle data table according to the control signal for switching the wide visual angle and the narrow visual angle; and the digital-to-analog conversion module is used for acquiring the sub-pixel visual angle data extracted by the visual angle data generation module, and converting the sub-pixel visual angle data into a voltage corresponding to the common voltage according to the input clock signal, the synchronous trigger signal and the common voltage and sending the voltage to the strip-shaped control electrode on the color film substrate of the liquid crystal display device. According to the invention, the sub-pixel visual angle data is converted into the voltage corresponding to the common voltage and is supplied to the strip control electrode on the color film substrate of the liquid crystal display device, so that the free switching of the wide and narrow visual angles can be realized, and the operation flexibility and convenience are stronger.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal display device and a driving module for switching a wide viewing angle and a narrow viewing angle.
Background
LCD (Liquid Crystal Display) has the advantages of good picture quality, small size, light weight, low driving voltage, low power consumption, no radiation and relatively low manufacturing cost, and is dominant in the field of flat panel Display.
Liquid crystal display devices are now gradually developed toward wide viewing angles, and wide viewing angles can be realized by using liquid crystal display devices of an in-plane switching mode (IPS) or a fringe field switching mode (FFS). However, in the current society, people pay more and more attention to protecting their privacy, and do not like to take out and share with people. In public places, the content is always expected to be kept secret when the user watches a mobile phone or browses a computer. Therefore, the display with single viewing angle mode has not been able to satisfy the user's requirement. In addition to the requirement of a wide viewing angle, there is also a need to be able to switch or adjust the display device to a narrow viewing angle mode where privacy is required.
HVA (Hybrid Viewing Angle) is a display technology in which a liquid crystal display device can be arbitrarily switched between a wide Viewing Angle and a narrow Viewing Angle depending on the actual situation. The difficulty of this technique is mainly focused on the narrow viewing angle mode.
In the process of implementing the invention, the inventor finds that the prior art has the following problems: the existing architecture makes the narrow viewing angle state of the whole liquid crystal display device be the same, and if the narrow viewing angle state is applied to intelligent applications such as man-machine interaction, the narrow viewing angle state is not flexible enough to be controlled.
Disclosure of Invention
The invention mainly aims to provide a liquid crystal display device and a driving module for switching a wide viewing angle and a narrow viewing angle thereof, and aims to solve the problems in the prior art.
In order to achieve the above object, a first aspect of embodiments of the present invention provides a driving module for switching a wide viewing angle and a narrow viewing angle of a liquid crystal display device, the driving module including: the device comprises a visual angle data generation module, a digital-to-analog conversion module and a power supply module;
the power supply module is used for supplying power to the visual angle data generation module and the digital-to-analog conversion module;
the visual angle data generation module is used for extracting sub-pixel visual angle data of a visual angle data table according to the control signal for switching the wide visual angle and the narrow visual angle;
the digital-to-analog conversion module is used for acquiring the sub-pixel visual angle data extracted by the visual angle data generation module, and converting the sub-pixel visual angle data into a voltage corresponding to a common voltage according to an input clock signal, a synchronous trigger signal and the common voltage and sending the voltage to a strip-shaped control electrode on a color film substrate of the liquid crystal display device.
Furthermore, the visual angle data generation module comprises a configuration register, a visual angle data table and a mapping register;
the configuration register is used for generating configuration signals to the view angle data table and the mapping register according to control signals for switching the wide view angle and the narrow view angle;
the view angle data table is used for editing the sub-pixel view angle data according to the configuration signal generated by the configuration register;
and the mapping register is used for extracting the sub-pixel visual angle data of the visual angle data table according to the configuration signal generated by the configuration register.
Further, the driving module further comprises a voltage output buffer module; the power supply module is also used for supplying power to the voltage output buffer module;
and the digital-to-analog conversion module converts the sub-pixel visual angle data into a voltage corresponding to the common voltage through the voltage output buffer module and sends the voltage to a strip-shaped control electrode on a color film substrate of the liquid crystal display device.
Further, the public voltage is a periodic alternating voltage, and the periodic alternating voltage comprises a square wave, a trapezoidal wave, a sine wave, a triangular wave or a sawtooth wave.
Further, the periodic alternating current voltage follows the frame synchronization signal for each frame as a change period, or follows the frame synchronization signal for each frame and turns over, or follows the frame synchronization signal for each line and turns over.
Further, to achieve the above object, a second aspect of embodiments of the present invention provides a liquid crystal display device including: the liquid crystal display device comprises a color film substrate, an array substrate arranged opposite to the color film substrate, and a liquid crystal layer positioned between the color film substrate and the array substrate, wherein one side, adjacent to the liquid crystal layer, of the color film substrate is provided with a plurality of strip-shaped control electrodes, the array substrate is provided with a common electrode and a pixel electrode, and the liquid crystal display device further comprises a driving module for switching wide and narrow visual angles; the driving module includes: the device comprises a visual angle data generation module, a digital-to-analog conversion module and a power supply module;
the power supply module is used for supplying power to the visual angle data generation module and the digital-to-analog conversion module;
the visual angle data generation module is used for extracting sub-pixel visual angle data of a visual angle data table according to the control signal for switching the wide visual angle and the narrow visual angle;
the digital-to-analog conversion module is used for acquiring the sub-pixel visual angle data extracted by the visual angle data generation module, and converting the sub-pixel visual angle data into a voltage corresponding to a common voltage according to an input clock signal, a synchronous trigger signal and the common voltage and sending the voltage to a strip-shaped control electrode on a color film substrate of the liquid crystal display device.
Furthermore, the visual angle data generation module comprises a configuration register, a visual angle data table and a mapping register;
the configuration register is used for generating configuration signals to the view angle data table and the mapping register according to control signals for switching the wide view angle and the narrow view angle;
the view angle data table is used for editing the sub-pixel view angle data according to the configuration signal generated by the configuration register;
and the mapping register is used for extracting the sub-pixel visual angle data of the visual angle data table according to the configuration signal generated by the configuration register.
Further, the driving module further comprises a voltage output buffer module; the power supply module is also used for supplying power to the voltage output buffer module;
and the digital-to-analog conversion module converts the sub-pixel visual angle data into a voltage corresponding to the common voltage through the voltage output buffer module and sends the voltage to a strip-shaped control electrode on a color film substrate of the liquid crystal display device.
Further, the public voltage is a periodic alternating voltage, and the periodic alternating voltage comprises a square wave, a trapezoidal wave, a sine wave, a triangular wave or a sawtooth wave.
Further, the periodic alternating current voltage follows the frame synchronization signal for each frame as a change period, or follows the frame synchronization signal for each frame and turns over, or follows the frame synchronization signal for each line and turns over.
According to the liquid crystal display device and the driving module for switching the wide and narrow viewing angles, provided by the embodiment of the invention, the sub-pixel viewing angle data are converted into the voltage corresponding to the common voltage through the driving module and are supplied to the strip-shaped control electrode on the color film substrate of the liquid crystal display device, so that the wide and narrow viewing angles can be freely switched, and the liquid crystal display device has strong operation flexibility and convenience.
Drawings
Fig. 1 is a schematic partial cross-sectional view of a display device according to an embodiment of the invention;
FIG. 2a is a schematic diagram of a display device under wide-viewing-angle dark-state display according to an embodiment of the present invention;
FIG. 2b is a schematic diagram of a display device under wide-viewing-angle bright-state display according to an embodiment of the present invention;
FIG. 2c is a schematic diagram of a display device under a narrow viewing angle dark state display according to an embodiment of the present invention;
FIG. 2d is a schematic diagram of a display device under a narrow viewing angle bright state display according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a driving module for switching between wide and narrow viewing angles of an LCD device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a first example timing diagram according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a second example timing structure according to the present invention;
fig. 6 is a schematic structural diagram of a third timing example according to the embodiment of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Implementation of various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves.
Fig. 1 is a schematic partial cross-sectional view of a display device according to an embodiment of the present invention, and referring to fig. 1, the display device includes: the liquid crystal display panel comprises a color film substrate 11, an array substrate 12 arranged opposite to the color film substrate 11, and a liquid crystal layer 13 located between the color film substrate 11 and the array substrate 12, wherein a plurality of strip-shaped control electrodes 111 are arranged on one side of the color film substrate 11, which is adjacent to the liquid crystal layer 13, and a common electrode 121 and a pixel electrode 122 are arranged on the array substrate 12; in this embodiment, an orthogonal projection of the stripe-shaped control electrode 111 on the array substrate 12 is located within an orthogonal projection of the common electrode 121 on the array substrate. In other embodiments, the orthographic projection of the stripe-shaped control electrode 111 on the array substrate 12 can also be located within the orthographic projection of the pixel electrode 122 on the array substrate. The strip-shaped control electrodes 111 are used for applying a bias voltage to adjust the viewing angle of the display device.
The display device according to the embodiment of the present invention is applicable to a liquid crystal driving Mode display device such as an FFS (Fringe field Switching) Mode display device and an IPS (In-Plane Switching) Mode display device. The liquid crystal layer is positive liquid crystal, and when no voltage is applied to the display device, the long axis direction of the positive liquid crystal is parallel to the plane of the display device. The working principle of the display device provided by the embodiment of the invention is described as follows:
(1) wide viewing angle dark state:
fig. 2a is a schematic diagram of a display device according to an embodiment of the present invention under a wide-viewing-angle dark state display.
Referring to fig. 2a, the color filter substrate 21 and the array substrate 22 have alignment layers 211 and 221 on the sides close to the liquid crystal layer 23, the alignment layers 211 and 221 have an anchoring effect on liquid crystal molecules, and the liquid crystal molecules of the liquid crystal layer 23 are arranged in a manner that the long axis direction of the liquid crystal molecules is parallel to the plane of the display device. When no bias voltage is applied to the plurality of strip-shaped control electrodes 212 disposed on the color filter substrate 21 adjacent to the liquid crystal layer 23 and no voltage is applied between the electrically insulated common electrode 222 and the pixel electrode 223 of the array substrate 22, the optical axes of the polarizer 213 on the color filter substrate 21 and the polarizer 224 on the array substrate 22 are perpendicular to each other. Since the liquid crystal molecules do not change the vibration direction of the light when no voltage is applied, the light cannot pass through the two polarizers 213 and 224 with the optical axes perpendicular to each other, and thus the display device is in an opaque dark state.
(2) Wide viewing angle bright state:
fig. 2b is a schematic diagram of the display device according to the embodiment of the invention in a wide-viewing-angle bright state display.
At this time, no bias voltage is applied to the plurality of strip-shaped control electrodes 212 arranged on the color film substrate 21 adjacent to one side of the liquid crystal layer 23, and when a voltage is applied between the electrically insulated common electrode 222 and the pixel electrode 223 of the array substrate 22, a fringe field is generated between the common electrode 222 and the pixel electrode 223 to twist the direction of the liquid crystal molecules, and the deflected liquid crystal molecules change the polarization direction of light, so that the light can penetrate through the two polarizing plates 213 and 224 with mutually perpendicular optical axis directions, thereby realizing a bright state. Because the light rays in all directions of the display device can be compensated to a certain degree by the edge field effect, the light rays emitted by the display device in all directions keep certain brightness, and therefore, a wide viewing angle can be realized.
The narrow viewing angle in the embodiment of the present invention is realized by applying a bias voltage to the strip-shaped control electrode on the color film substrate to cause the display device to generate light leakage in the dark state, so that the contrast between the bright state and the dark state is reduced, thereby reducing the display viewing angle of the display device, and adjusting the display viewing angle of the display device by adjusting the value of the applied bias voltage. The principle of the narrow viewing angle is explained below with reference to fig. 2c and 2 d.
(3) Narrow viewing angle dark state:
fig. 2c is a schematic diagram of the display device according to the embodiment of the invention under the wide-viewing-angle dark state display.
A bias voltage is applied to the plurality of stripe control electrodes 212 on the color filter substrate 21, and at this time, no voltage is applied between the electrically insulated common electrode 222 and the pixel electrode 223 of the array substrate 22, so that an edge field effect is not formed between the common electrode 222 and the pixel electrode 223. However, due to the application of the bias voltage to the plurality of strip-shaped control electrodes 212 on the color film substrate 21, a voltage difference exists between the strip-shaped control electrodes 212 and the common electrode 222 or the pixel electrode 223 below the strip-shaped control electrodes, a part of liquid crystal molecules are deflected under the action of the electric field, and the deflected liquid crystal molecules provide a certain twist to the polarization direction of light, so that a certain degree of light leakage is formed. Referring to the light transmittance diagram of the top of fig. 2c, it can be seen that there is light leakage near the stripe-shaped control electrode 212.
(4) Narrow viewing angle bright state:
fig. 2d is a schematic diagram of the display device according to the embodiment of the invention in a narrow viewing angle bright state display.
Bias voltage is applied to the strip control electrodes 212 arranged on the color film substrate 21 and adjacent to one side of the liquid crystal layer 23, and when voltage is applied to the common electrode 222 and the pixel electrode 223 of the array substrate 22, a fringe field is generated between the common electrode 222 and the pixel electrode 223 to twist the direction of liquid crystal molecules, and the deflected liquid crystal molecules change the polarization direction of light, so that the light can penetrate through the two polarizing plates 213 and 224 with mutually perpendicular optical axis directions, and a bright state is realized. At this time, the liquid crystal molecules in the liquid crystal layer 23 are simultaneously subjected to the fringe field generated between the common electrode 222 and the pixel electrode 223 and the bias voltage applied to the stripe control electrode 212, so that the contrast between the bright state and the dark state in this state is reduced compared with the contrast between the bright state and the dark state when no bias voltage is applied to the stripe control electrode 212, and thus the viewing angle of the bright state in this state is reduced, thereby achieving a narrow viewing angle.
On the basis of the above embodiment, the bias voltage is in the range of 0 to 4V, and is generally smaller than the voltage applied between the pixel electrode and the common electrode. When the bias voltage is 0V, the display device displays wide visual angle, and when the applied bias voltage is changed in the range of 0-4V, different display visual angles can be obtained by selecting different bias voltages.
According to the embodiment of the invention, a plurality of strip-shaped control electrodes are arranged on one side of a color film substrate close to a liquid crystal layer, and a common electrode and a pixel electrode with edge field effect are formed on an array substrate; when bias voltage is not applied to the strip control electrodes, a wide viewing angle is realized, and whether voltage is applied to the common electrode and the pixel electrode or not is controlled to realize the bright state and the dark state of the wide viewing angle. When bias voltage is applied to the strip-shaped control electrode, the strip-shaped control electrode and a common electrode or a pixel electrode right below the strip-shaped control electrode form a voltage difference, light leakage in an area near the strip-shaped control electrode is achieved, and whether voltage is applied to the common electrode and the pixel electrode or not is controlled, so that a bright state and a dark state with narrow visual angles are achieved. The strip-shaped control electrodes apply bias voltage to cause light leakage, so that the contrast of a bright state and a dark state of the display device is reduced, and the visual angle of the display device is reduced.
On the basis of the above embodiments, the strip-shaped control electrodes may be indium tin oxide films, and may also be metal films. The strip control electrode adopts an indium tin oxide film to improve the transmittance of the display device, and adopts a metal film to reduce the resistance, thereby shortening the response time of the display device.
On the basis of the above embodiment, the array substrate further includes a plurality of data lines and a plurality of scan lines, and the strip-shaped control electrodes may be parallel to the data lines and may also be parallel to the scan lines. In addition, a plurality of pixel units are defined by a plurality of data lines and a plurality of scanning lines of the array substrate, and two adjacent strip-shaped control electrodes are spaced by one row or one column of pixel units. The color film substrate positioned above the array substrate is provided with a black matrix, and a plurality of data lines and a plurality of scanning lines of the array substrate are positioned under the black matrix. And the orthographic projection of the strip-shaped control electrode on the color film substrate is positioned in the orthographic projection of the black matrix on the color film substrate. Therefore, the width of the stripe-shaped control electrode is only required to be smaller than or equal to the width of the black matrix. The benefits of this arrangement are: the black matrix covers the strip control electrodes, so that the aperture ratio of the display device is not influenced, and the light transmittance of the display device is not influenced.
In addition, when a user looks at the display device at a small angle, the light received by eyes is mainly the light of the central area of the pixel unit, and when the user looks at the display device at a large angle, the light received by the eyes of the user is mainly the light transmitted by the edge area of the pixel unit, so that the user only needs to set the edge area of the pixel unit to have light leakage to prevent people nearby from looking at the information on the display device at a narrow angle. The orthographic projection of the strip-shaped control electrode on the color film substrate is positioned in the orthographic projection of the black matrix on the color film substrate, the strip-shaped control electrode is mainly positioned in the edge area of the pixel unit, and bias voltage applied to the strip-shaped control electrode mainly enables light leakage to exist in the edge area of the pixel unit and does not affect projected light rays in the central area of the pixel unit. Therefore, the brightness of the display device is not affected when viewed at a narrow viewing angle.
Based on the above principle, the present invention proposes the following embodiments:
as shown in fig. 3, a first embodiment of the present invention provides a driving module for switching a wide viewing angle and a narrow viewing angle of a liquid crystal display device, the driving module comprising: a viewing angle data generating module 30, a digital-to-analog converting module 31 and a power supply module 32.
The power module 32 is used for supplying power to the viewing angle data generation module 30 and the digital-to-analog conversion module 31.
The viewing angle data generating module 30 is configured to extract sub-pixel viewing angle data of the viewing angle data table according to the control signal for switching between the wide and narrow viewing angles.
Referring to fig. 3 again, in the present embodiment, the view data generating module 30 includes a configuration register 301, a view data table 302 and a mapping register 303;
the configuration register 301 is configured to generate a configuration signal to the view data table 302 and the mapping register 303 according to the control signal for switching the wide and narrow views.
And a view angle data table 302 for editing the sub-pixel view angle data according to the configuration signal generated by the configuration register 301.
In the present embodiment, the size of the viewing angle data table is determined according to the resolution and the application of the liquid crystal display device.
In this embodiment, the viewing angle data table 302 edits the sub-pixel viewing angle data according to the configuration signal generated by the configuration register 301, so that a voltage output change with any gradual change can be realized, and further, adjustment of optimization of the technical effect of the hybrid viewing angle and adjustment of different customers for different requirements of the narrow viewing angle can be realized.
For example, in a Full High Definition (FHD) lcd device, a lateral viewing angle (i.e. a wide viewing angle) control is required, and if the control accuracy is required to achieve sub-pixel accuracy, a viewing angle data of 1920 × 8 × 3 × N (N > -2) is required; if the control process requires pixel accuracy, 1920 × 8 × 1 × N (N > -2) view angle data is required.
And a mapping register 303, configured to extract the sub-pixel viewing angle data of the viewing angle data table 302 according to the configuration signal generated by the configuration register.
In this embodiment, the mapping register 303 may extract the sub-pixel viewing angle data of the viewing angle data table 302 according to a resolution, a polarity pattern, or an output pattern.
The digital-to-analog conversion module 31 is configured to acquire the sub-pixel viewing angle data extracted by the viewing angle data generation module 30, and convert the sub-pixel viewing angle data into a voltage corresponding to the common voltage according to the input clock signal, the synchronous trigger signal, and the common voltage, and send the voltage to a strip-shaped control electrode on a color film substrate of the liquid crystal display device.
In this embodiment, the synchronization trigger Signal (SP) is a synchronization signal that starts every frame, is synchronized with the panel STV, and has a fixed phase relationship with the STV.
The rising edge of the input clock signal (CLK) triggers the synchronous trigger Signal (SP) and the action of the mapping register, and the falling edge enables the corresponding digital-to-analog conversion module to output the corresponding polarity voltage.
In one embodiment, the driving module further comprises a voltage output buffer module 33; the power module 32 is also used to supply power to the voltage output buffer module 33.
The digital-to-analog conversion module 32 converts the sub-pixel viewing angle data into a voltage corresponding to the common voltage through the voltage output buffer module 33, and sends the voltage to the strip-shaped control electrode on the color film substrate of the liquid crystal display device.
In this embodiment, the common voltage is a periodic ac voltage, and the periodic ac voltage specifically includes a square wave, a trapezoidal wave, a sine wave, a triangular wave, or a sawtooth wave. It should be noted that the periodic alternating current voltage is not limited in this embodiment.
Referring to fig. 4, in the view angle data table 302 of S1-S1920 in the figure, Bank a is the first set of view angle data, Bank B is the Second set of view angle data, clk is the input clock signal, SP is the synchronous trigger signal, Firstframe is the first frame signal, Second frame signal, Vcom is the common voltage, and the common voltage Vcom is inverted with each frame of the frame synchronization signal.
Referring to fig. 5, the view angle data in the view angle data table 302 of S1-S1920 in the figure, wherein Bank a is the first set of view angle data, Bank B is the Second set of view angle data, clk is the input clock signal, SP is the synchronous trigger signal, Firstframe is the first frame signal, Second frame signal, Vcom is the common voltage, and the common voltage Vcom follows the frame synchronization signal for one change period per frame.
Referring to fig. 6, in the view angle data table 302 of S1-S1920 in the figure, Bank a is the first set of view angle data, Bank B is the Second set of view angle data, clk is the input clock signal, SP is the synchronous trigger signal, Firstframe is the first frame signal, Second frame signal, Vcom is the common voltage, and the common voltage Vcom is inverted once following each line of the frame synchronization signal.
It should be noted that the common voltage Vcom follows the inversion of the frame synchronization signal and is not limited to the above case, and the embodiment is not limited thereto. For example: when the control progress reaches the pixel accuracy, different inversions can be realized according to different arrangements of the sub-pixels.
According to the driving module for switching the wide and narrow visual angles of the liquid crystal display device, provided by the embodiment of the invention, the sub-pixel visual angle data are converted into the voltage corresponding to the common voltage through the driving module and are sent to the strip-shaped control electrode on the color film substrate of the liquid crystal display device, so that the wide and narrow visual angles can be freely switched, and the driving module has strong operation flexibility and convenience.
Second embodiment
Referring to fig. 1 to 3, a second embodiment of the present invention provides a liquid crystal display device including: the liquid crystal display panel comprises a color film substrate 11, an array substrate 12 arranged opposite to the color film substrate 11, and a liquid crystal layer 13 located between the color film substrate 11 and the array substrate 12, wherein a plurality of strip-shaped control electrodes 111 are arranged on one side of the color film substrate 11, which is adjacent to the liquid crystal layer 13, and a common electrode 121 and a pixel electrode 122 are arranged on the array substrate.
The liquid crystal display device further includes a driving module for switching a wide and a narrow viewing angle, the driving module including: a viewing angle data generating module 30, a digital-to-analog converting module 31 and a power supply module 32.
The power module 32 is used for supplying power to the viewing angle data generation module 30 and the digital-to-analog conversion module 31.
The viewing angle data generating module 30 is configured to extract sub-pixel viewing angle data of the viewing angle data table according to the control signal for switching between the wide and narrow viewing angles.
Referring to fig. 3 again, in the present embodiment, the view data generating module 30 includes a configuration register 301, a view data table 302 and a mapping register 303;
the configuration register 301 is configured to generate a configuration signal to the view data table 302 and the mapping register 303 according to the control signal for switching the wide and narrow views.
And a view angle data table 302 for editing the sub-pixel view angle data according to the configuration signal generated by the configuration register 301.
In the present embodiment, the size of the viewing angle data table is determined according to the resolution and the application of the liquid crystal display device.
In this embodiment, the viewing angle data table 302 edits the sub-pixel viewing angle data according to the configuration signal generated by the configuration register 301, so that a voltage output change with any gradual change can be realized, and further, adjustment of optimization of the technical effect of the hybrid viewing angle and adjustment of different customers for different requirements of the narrow viewing angle can be realized.
For example, in a Full High Definition (FHD) lcd device, a lateral viewing angle (i.e., a wide viewing angle) control is required, and a sub-pixel accuracy is required, so that a viewing angle data of 1920 × 8 × 3 × N (N > -2) is required; if the control process requires pixel accuracy, 1920 × 8 × 1 × N (N > -2) view angle data is required.
And a mapping register 303, configured to extract the sub-pixel viewing angle data of the viewing angle data table 302 according to the configuration signal generated by the configuration register.
In this embodiment, the mapping register 303 may extract the sub-pixel viewing angle data of the viewing angle data table 302 according to a resolution, a polarity pattern, or an output pattern.
The digital-to-analog conversion module 31 is configured to acquire the sub-pixel viewing angle data extracted by the viewing angle data generation module 30, and convert the sub-pixel viewing angle data into a voltage corresponding to the common voltage according to the input clock signal, the synchronous trigger signal, and the common voltage, and send the voltage to a strip-shaped control electrode on a color film substrate of the liquid crystal display device.
In this embodiment, the synchronization trigger Signal (SP) is a synchronization signal that starts every frame, is synchronized with the panel STV, and has a fixed phase relationship with the STV.
The rising edge of the input clock signal (CLK) triggers the synchronous trigger Signal (SP) and the action of the mapping register, and the falling edge enables the corresponding digital-to-analog conversion module to output the corresponding polarity voltage.
In one embodiment, the driving module further comprises a voltage output buffer module 33; the power module 32 is also used to supply power to the voltage output buffer module 33.
The digital-to-analog conversion module 32 converts the sub-pixel viewing angle data into a voltage corresponding to the common voltage through the voltage output buffer module 33, and sends the voltage to the strip-shaped control electrode on the color film substrate of the liquid crystal display device.
In this embodiment, the common voltage is a periodic ac voltage, and the periodic ac voltage specifically includes a square wave, a trapezoidal wave, a sine wave, a triangular wave, or a sawtooth wave. It should be noted that the periodic alternating current voltage is not limited in this embodiment.
Referring to fig. 4, in the view angle data table 302 of S1-S1920 in the figure, Bank a is the first set of view angle data, Bank B is the Second set of view angle data, clk is the input clock signal, SP is the synchronous trigger signal, Firstframe is the first frame signal, Second frame signal, Vcom is the common voltage, and the common voltage Vcom is inverted with each frame of the frame synchronization signal.
Referring to fig. 5, the view angle data in the view angle data table 302 of S1-S1920 in the figure, wherein Bank a is the first set of view angle data, Bank B is the Second set of view angle data, clk is the input clock signal, SP is the synchronous trigger signal, Firstframe is the first frame signal, Second frame signal, Vcom is the common voltage, and the common voltage Vcom follows the frame synchronization signal for one change period per frame.
Referring to fig. 6, in the view angle data table 302 of S1-S1920 in the figure, Bank a is the first set of view angle data, Bank B is the Second set of view angle data, clk is the input clock signal, SP is the synchronous trigger signal, Firstframe is the first frame signal, Second frame signal, Vcom is the common voltage, and the common voltage Vcom is inverted once following each line of the frame synchronization signal.
It should be noted that the common voltage Vcom follows the inversion of the frame synchronization signal and is not limited to the above case, and the embodiment is not limited thereto. For example: when the control progress reaches the pixel accuracy, different inversions can be realized according to different arrangements of the sub-pixels.
According to the liquid crystal display device provided by the embodiment of the invention, the sub-pixel visual angle data is converted into the voltage corresponding to the common voltage through the driving module and is supplied to the strip control electrode on the color film substrate of the liquid crystal display device, so that the free switching of wide and narrow visual angles can be realized, and the liquid crystal display device has strong operation flexibility and convenience.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A driving module for switching a wide and a narrow viewing angle of a liquid crystal display device, the driving module comprising: the device comprises a visual angle data generation module, a digital-to-analog conversion module and a power supply module;
the power supply module is used for supplying power to the visual angle data generation module and the digital-to-analog conversion module;
the visual angle data generation module is used for extracting sub-pixel visual angle data of a visual angle data table according to the control signal for switching the wide visual angle and the narrow visual angle;
the digital-to-analog conversion module is used for acquiring the sub-pixel visual angle data extracted by the visual angle data generation module, and converting the sub-pixel visual angle data into a voltage corresponding to a common voltage according to an input clock signal, a synchronous trigger signal and the common voltage and sending the voltage to a strip-shaped control electrode on a color film substrate of the liquid crystal display device;
the visual angle data generation module comprises a configuration register, a visual angle data table and a mapping register;
the configuration register is used for generating configuration signals to the view angle data table and the mapping register according to control signals for switching the wide view angle and the narrow view angle;
the view angle data table is used for editing the sub-pixel view angle data according to the configuration signal generated by the configuration register;
and the mapping register is used for extracting the sub-pixel visual angle data of the visual angle data table according to the configuration signal generated by the configuration register.
2. The driving module for wide and narrow viewing angle switching of a liquid crystal display device according to claim 1, wherein the driving module further comprises a voltage output buffer module; the power supply module is also used for supplying power to the voltage output buffer module;
and the digital-to-analog conversion module converts the sub-pixel visual angle data into a voltage corresponding to the common voltage through the voltage output buffer module and sends the voltage to a strip-shaped control electrode on a color film substrate of the liquid crystal display device.
3. The driving module for wide and narrow viewing angle switching of liquid crystal display device of claim 1, wherein the common voltage is a periodic ac voltage, and the periodic ac voltage comprises a square wave, a trapezoidal wave, a sine wave, a triangular wave, or a sawtooth wave.
4. The driving module for wide and narrow viewing angle switching of liquid crystal display device according to claim 3, wherein the periodic alternating current voltage follows the frame synchronization signal for a change period every frame, or follows the frame synchronization signal for a turn every line.
5. A liquid crystal display device, characterized in that the liquid crystal display device comprises: the liquid crystal display device comprises a color film substrate, an array substrate arranged opposite to the color film substrate, and a liquid crystal layer positioned between the color film substrate and the array substrate, wherein one side, adjacent to the liquid crystal layer, of the color film substrate is provided with a plurality of strip-shaped control electrodes, and the array substrate is provided with a common electrode and a pixel electrode; the driving module includes: the device comprises a visual angle data generation module, a digital-to-analog conversion module and a power supply module;
the power supply module is used for supplying power to the visual angle data generation module and the digital-to-analog conversion module;
the visual angle data generation module is used for extracting sub-pixel visual angle data of a visual angle data table according to the control signal for switching the wide visual angle and the narrow visual angle;
the digital-to-analog conversion module is used for acquiring the sub-pixel visual angle data extracted by the visual angle data generation module, and converting the sub-pixel visual angle data into a voltage corresponding to a common voltage according to an input clock signal, a synchronous trigger signal and the common voltage and sending the voltage to a strip-shaped control electrode on a color film substrate of the liquid crystal display device;
the visual angle data generation module comprises a configuration register, a visual angle data table and a mapping register;
the configuration register is used for generating configuration signals to the view angle data table and the mapping register according to control signals for switching the wide view angle and the narrow view angle;
the view angle data table is used for editing the sub-pixel view angle data according to the configuration signal generated by the configuration register;
and the mapping register is used for extracting the sub-pixel visual angle data of the visual angle data table according to the configuration signal generated by the configuration register.
6. The liquid crystal display device of claim 5, wherein the driving module further comprises a voltage output buffer module; the power supply module is also used for supplying power to the voltage output buffer module;
and the digital-to-analog conversion module converts the sub-pixel visual angle data into a voltage corresponding to the common voltage through the voltage output buffer module and sends the voltage to a strip-shaped control electrode on a color film substrate of the liquid crystal display device.
7. The liquid crystal display device of claim 5, wherein the common voltage is a periodic AC voltage comprising a square wave, a trapezoidal wave, a sine wave, a triangular wave, or a sawtooth wave.
8. The liquid crystal display device of claim 7, wherein the periodic alternating voltage follows the frame sync signal for a change period every frame, or follows the frame sync signal for a flip every line.
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| TWI738417B (en) * | 2020-07-10 | 2021-09-01 | 友達光電股份有限公司 | Display device and driving method thereof |
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