CN107255873B - Display device with switchable wide and narrow viewing angles and driving method - Google Patents
Display device with switchable wide and narrow viewing angles and driving method Download PDFInfo
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- CN107255873B CN107255873B CN201710597193.7A CN201710597193A CN107255873B CN 107255873 B CN107255873 B CN 107255873B CN 201710597193 A CN201710597193 A CN 201710597193A CN 107255873 B CN107255873 B CN 107255873B
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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
- 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
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/068—Adjustment of display parameters for control of viewing angle adjustment
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- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The display device comprises a display panel, wherein the display panel is provided with a plurality of scanning lines and a plurality of data lines, the plurality of scanning lines and the plurality of data lines are mutually insulated, crossed and limited to form a plurality of pixel units arranged in an array mode, the display device also comprises a signal data processing module, and the signal data processing module is used for carrying out progressive decreasing processing on signal data from a signal source from the middle position of the display panel to two sides and providing the signal data subjected to the decreasing processing to each pixel unit of the display panel through the plurality of data lines when the display device is in a narrow viewing angle mode. The display device provided by the embodiment realizes that the brightness of the display panel gradually decreases from the middle position to two sides in a narrow viewing angle mode, the display effect of the narrow viewing angle is enhanced, and the display device can be matched with a common backlight source without using a light-collecting backlight source, so that the cost is reduced.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device with switchable wide and narrow viewing angles and a driving method thereof.
Background
With the continuous development of scientific technology, the production technology of display panels is more mature, and the viewing angle is wider, people can watch clear pictures from different angles, but when the pictures relate to personal privacy or trade privacy, the protection of privacy becomes a problem that people must face.
The visual angle switching technology can greatly meet the protection of people on personal privacy and business privacy, when the visual angle is switched to a narrow visual angle, the content displayed on the screen cannot be seen in a certain angle range of the side position, and the effect of the narrow visual angle is better if the content is not clearly seen.
Fig. 1 is a schematic block diagram of a driving architecture of a conventional display device, which includes a display panel 1, a timing controller 4 and a data driving chip 5, wherein the timing controller 4 receives signal data from a signal source 6 and converts the signal data into signals acceptable by the data driving chip 5, and the data driving chip 5 converts digital signals provided by the timing controller 4 into analog signals, and then outputs the analog signals to the display panel 1 for lighting display.
In the case of a liquid crystal display device, a backlight source is used in combination with the liquid crystal display device. In order to realize the switching of the wide and narrow viewing angles, one of the methods is to use a light-collecting backlight source, which can realize the decreasing of the display brightness of the picture from the middle position to the two sides and enhance the narrow viewing angle display effect at the two sides, but the light-collecting backlight is expensive, has poor yield and is few in suppliers.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a display device with switchable wide and narrow viewing angles and a driving method thereof, which can realize the function of switching between the wide viewing angle and the narrow viewing angle without using a light-collecting backlight.
The invention provides a display device with switchable wide and narrow viewing angles, which comprises a display panel, wherein the display panel is provided with a plurality of scanning lines and a plurality of data lines, the plurality of scanning lines and the plurality of data lines are mutually insulated and crossed to limit a plurality of pixel units arranged in an array mode, the display device also comprises a signal data processing module, and the signal data processing module is used for carrying out progressive decreasing processing on signal data from a signal source from the middle position of the display panel to two sides and providing the signal data subjected to decreasing processing to each pixel unit of the display panel through the plurality of data lines when the display device is in a narrow viewing angle mode.
Further, the signal data processing module is specifically configured to progressively decrease the signal data from the signal source from the middle position to both sides of the display panel in a manner that the reduction percentage is gradually increased.
Further, the signal data processing module performs different decrement processing of the reduction percentage value on the signal data provided for each data line along any one direction from the middle position of the display panel to the two sides.
Further, along any side direction from the middle position of the display panel to two sides, the signal data processing module performs decreasing processing on the signal data by taking each three data lines as a group, and performs decreasing processing on the signal data provided for the three data lines of the same group by the same reduction percentage value.
Furthermore, the display device also comprises a time schedule controller and a data driving chip, wherein the signal data processing module is connected between the time schedule controller and the data driving chip, the data driving chip is connected with the plurality of data lines, and the time schedule controller is connected with a signal source to receive signal data from the signal source.
Furthermore, the display device is provided with a visual angle switching key for switching different visual angle modes, the visual angle switching key is connected with the signal data processing module, and the signal data processing module judges the visual angle mode of the display device according to a signal sent by the visual angle switching key.
The invention also provides a driving method of a display device with switchable wide and narrow viewing angles, the display device comprises a display panel, the display panel is provided with a plurality of scanning lines and a plurality of data lines, the plurality of scanning lines and the plurality of data lines are mutually insulated and crossed to limit and form a plurality of pixel units arranged in an array, and the driving method comprises the following steps:
in the wide viewing angle mode, signal data from a signal source is provided to each pixel unit of the display panel through the plurality of data lines, so that the display panel realizes wide viewing angle display;
in the narrow viewing angle mode, the signal data from the signal source is firstly processed in a stepwise decreasing manner from the middle position to two sides of the display panel, and then the signal data after the decreasing processing is provided for each pixel unit of the display panel through the plurality of data lines, so that the display panel realizes narrow viewing angle display.
Further, in the narrow viewing angle mode, the step-wise decreasing process is to decrease the signal data from the signal source from the middle of the display panel to both sides in a manner that the reduction percentage is gradually increased.
Further, in the narrow viewing angle mode, the signal data provided to each data line is processed in a decreasing manner by different reduction percentage values along any one direction from the middle position to the two sides of the display panel.
Further, in the narrow viewing angle mode, the signal data is processed in a decreasing manner by taking every three data lines as a group along any one side direction from the middle position of the display panel to two sides, and the signal data provided for the three data lines of the same group is processed in a decreasing manner by the same reduction percentage value.
The display device and the driving method provided by the invention realize that the brightness of the display panel gradually decreases from the middle position to two sides in a narrow viewing angle mode, the display effect of the narrow viewing angle is enhanced, and the cost is reduced by matching with a common backlight source without using a light-collecting backlight source.
Drawings
Fig. 1 is a block diagram of a driving architecture of a conventional display device.
Fig. 2 is a block diagram of a driving architecture of a display device according to an embodiment of the invention.
FIG. 3 is a diagram illustrating a brightness decreasing process performed on the panel by the display apparatus shown in FIG. 1.
FIG. 4 is another diagram illustrating a brightness decreasing process performed on the panel by the display apparatus shown in FIG. 1.
Fig. 5a and 5b are schematic plan views of the display device in fig. 1.
Fig. 6 is a flowchart illustrating a driving method of a display device according to an embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Referring to fig. 2 to fig. 6, fig. 2 is a schematic block diagram of a driving structure of a display device according to an embodiment of the present invention; FIG. 3 is a diagram illustrating a brightness decreasing process performed on the panel by the display device of FIG. 1; FIG. 4 is another diagram illustrating a brightness decreasing process performed on the panel by the display apparatus of FIG. 1; FIGS. 5a and 5b are schematic plan views of the display device of FIG. 1; fig. 6 is a flowchart illustrating a driving method of a display device according to an embodiment of the invention.
The display device with switchable wide and narrow viewing angles, provided by the embodiment of the invention, comprises a display panel 10, wherein the display panel 10 is provided with a plurality of scanning lines 11 and a plurality of data lines 12, and the plurality of scanning lines 11 and the plurality of data lines 12 are mutually insulated, crossed and limited to form a plurality of pixel units 13 arranged in an array.
In one embodiment, the display panel 10 is a liquid crystal display panel, and includes an array substrate, a color filter substrate disposed opposite to the array substrate, and a liquid crystal layer disposed between the array substrate and the color filter substrate. The array substrate is provided with a scanning line 11, a data line 12, a switching element 14, and a pixel electrode 15 on a side facing the liquid crystal layer. The switching element 14 is, for example, a Thin Film Transistor (TFT). The array substrate is defined by a plurality of scanning lines 11 and a plurality of data lines 12 which are insulated from each other and crossed to form a plurality of pixel units 13 arranged in an array. Each pixel unit 13 is provided with a switching element 14 and a pixel electrode 15, and the pixel electrode 15 is connected to the scanning line 11 and the data line 12 via the switching element 14. Each switching element 14 includes a gate electrode electrically connected to the corresponding scan line 11, an active layer, a source electrode electrically connected to the corresponding data line 12, and a drain electrode electrically connected to the corresponding pixel electrode 15.
In other embodiments, the display panel 10 may also be other types of display panels, such as an Organic Light Emitting Diode (OLED) display panel.
The display device further includes a signal data processing module 20, a timing controller (Tcon)40, and a data driving chip (source IC)50, the signal data processing module 20 being connected between the timing controller 40 and the data driving chip 50, the data driving chip 50 being connected to the plurality of data lines 12, the timing controller 40 being connected to the signal source 60 to receive signal data from the signal source 60.
The signal source 60 functions to provide signal data required to light the display panel 10.
The timing controller 40 functions to convert the signal data inputted from the signal source 60 into a signal acceptable to the data driving chip 50.
The signal data processing module 20 is used for further processing the signal data converted by the timing controller 40 when the display device is in the narrow viewing angle mode, and for gradually decreasing the signal data provided to each data line 12 from the middle position of the display panel 10 to both sides.
That is, the signal data processing module 20 is configured to perform a stepwise decreasing processing on the signal data from the signal source 60 from the middle position of the display panel 10 to both sides when the display device is in the narrow viewing angle mode, and provide the signal data after the decreasing processing to each pixel unit 13 of the display panel 10 through the plurality of data lines 12.
The data driving chip 50 functions to convert the digital signal provided from the signal data processing module 20 into an analog signal through a digital-to-analog converter (DAC), and then output the analog signal to each data line 12 of the display panel 10.
In this embodiment, specifically, the signal data processing module 20 is configured to perform a stepwise decrease on the signal data from the signal source 60 from the middle position of the display panel 10 to the two sides in a manner that the reduction percentage gradually increases. When the display device is switched to the narrow viewing angle mode, the signal data processing module 20 starts to operate, taking the pixel units 13 displaying one row as an example for explanation, and making a plurality of equal parts to two sides of the display panel 10 respectively by taking the center as a boundary, each equal part corresponding to a percentage value which needs to reduce the brightness, wherein each percentage value indicated in fig. 3 and 4 is the reduction percentage value of each pixel unit 13 respectively, and the numerical value of the reduction percentage is gradually increased from the middle position to two sides by a certain rule, as shown in fig. 3 or 4; then, the signal data which is output by the time schedule controller 40 and can be accepted by the data driving chip 50 is corresponded to the divided equal parts, and the corresponding calculation operation is carried out according to the set reduction percentage value; and finally outputs the processed signal data to the data driving chip 50. Thus, the display brightness of the display panel 10 is gradually decreased from the middle position to the two sides, and the display effect in the narrow viewing angle mode is enhanced.
Referring to fig. 3, in one embodiment, the signal data processing module 20 performs a decreasing process on the signal data provided to each data line 12 by different percentage reduction values along a direction from the middle of the display panel 10 to either side of the display panel.
Referring to fig. 4, in another embodiment, along a direction from the middle of the display panel 10 to either side of the two sides, the signal data processing module 20 performs a decrement process on the signal data by using each adjacent three data lines 12 as a group, and performs the same decrement process on the signal data provided to the adjacent three data lines 12 of the same group by using the same percentage reduction value. One pixel (pixel) of the display panel 10 may be formed by R, G, B three sub-pixels (sub-pixels), so that the three adjacent data lines 12 connected to R, G, B three sub-pixels in the same pixel may all be processed with the same decrement percentage value.
Referring to fig. 2 and fig. 5a to 5b, in order to switch the wide and narrow viewing angles, the display device is further provided with a viewing angle switching key 30 for switching different viewing angle modes, the viewing angle switching key 30 is connected to the signal data processing module 20, and the signal data processing module 20 determines the viewing angle mode of the display device according to a signal sent by the viewing angle switching key 30. The user may send a viewing angle switching request signal by triggering the viewing angle switching key 30, for example, when the user triggers the viewing angle switching key 30 to switch to the wide viewing angle mode, the viewing angle switching key 30 will output a low level signal (L) to the signal data processing module 20; when the user triggers the viewing angle switching key 30 to switch to the narrow viewing angle mode, the viewing angle switching key 30 outputs a high level signal (H) to the signal data processing module 20, so that the signal data processing module 20 can determine the viewing angle mode of the display device by determining the received high and low level signals.
The view angle switching key 30 may be a mechanical key (as shown in fig. 5a) or a virtual key (as shown in fig. 5b, set by software control or application program). When a user needs to switch a wide viewing angle and a narrow viewing angle, a viewing angle switching request signal can be sent to the display device by operating the viewing angle switching key 30, and the signal data processing module 20 determines whether the viewing angle switching request signal is at a high level or a low level, so as to obtain a viewing angle mode of the display device. When the display device is switched to the narrow viewing angle mode, the signal data processing module 20 performs a stepwise decreasing process on the signal data from the signal source 60 from the middle position of the display panel 10 to both sides, and provides the decreased signal data to each pixel unit 13 of the display panel 10 through the plurality of data lines 12. Through the visual angle switching key 30, a user can freely select and switch the wide and narrow visual angles according to different peep-proof requirements.
Specifically, the signal data processing module 20 may be integrated in the data driving chip 50, VGA, or implemented by using a plug-in chip.
The embodiment realizes that the brightness of the display panel gradually decreases from the middle position to two sides in the narrow viewing angle mode, thereby enhancing the display effect of the narrow viewing angle, and the display panel is matched with a common backlight source without using a light-collecting backlight source, thereby reducing the cost.
Referring to fig. 2 to 6, an embodiment of the present invention further provides a driving method of a display device with switchable wide and narrow viewing angles, the driving method including:
in the wide viewing angle mode, the signal data from the signal source 60 is provided to the pixel units 13 of the display panel 10 through the data lines 12, so that the display panel 10 realizes normal wide viewing angle display;
in the narrow viewing angle mode, the signal data from the signal source 60 is first subjected to a stepwise decreasing process from the middle position of the display panel 10 to both sides, and then the signal data after the decreasing process is provided to each pixel unit 13 of the display panel 10 through the plurality of data lines 12, so that the display panel 10 realizes the narrow viewing angle display.
In the narrow viewing angle mode, the progressive decrement processing is to progressively decrement the signal data from the signal source 60 from the middle position of the display panel 10 to both sides in such a manner that the reduction percentage is gradually increased.
In one embodiment, as shown in fig. 3, in the narrow viewing angle mode, the signal data provided to each data line 12 is processed in a decreasing manner with different reduction percentage values along either side direction from the middle position of the display panel 10.
In another embodiment, as shown in fig. 4, in the narrow viewing angle mode, the signal data is processed in a decreasing manner with every three data lines 12 as a group along any one side direction from the middle position of the display panel 10 to both sides, and the signal data provided to the three data lines 12 of the same group is all processed in a decreasing manner by the same reduction percentage value.
The driving method of the present embodiment and the display device of the above embodiment belong to the same concept, and further details of the driving method can be referred to the description of the display device in the above embodiment, which is not repeated herein.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A display device with switchable wide and narrow viewing angles comprises a display panel, wherein the display panel is provided with a plurality of scanning lines and a plurality of data lines, the plurality of scanning lines and the plurality of data lines are mutually insulated, crossed and limited to form a plurality of pixel units which are arranged in an array mode, and the display device is characterized by further comprising a signal data processing module, wherein the signal data processing module is used for carrying out progressive descending processing on signal data from a signal source from the middle position of the display panel to two sides and providing the signal data subjected to the progressive descending processing to each pixel unit of the display panel through the plurality of data lines so as to realize the progressive descending of the display brightness of the display panel from the middle position to the two sides when the display device is in a narrow viewing angle mode.
2. The display device of claim 1, wherein the signal data processing module is specifically configured to progressively decrease the signal data from the signal source from the middle of the display panel to both sides in a manner that the percentage of the reduction is gradually increased.
3. The display device according to claim 2, wherein the signal data processing module performs a decreasing process of a different reduction percentage value on the signal data provided to each data line along any one direction from the middle position to the two sides of the display panel.
4. The display device of claim 2, wherein the signal data processing module performs a decreasing process on the signal data by using every three data lines as a group along any one direction from the middle position of the display panel to both sides, and performs the same decreasing process on the signal data provided to the three data lines of the same group by using the same reduction percentage value.
5. The display device according to claim 1, further comprising a timing controller and a data driving chip, wherein the signal data processing module is connected between the timing controller and the data driving chip, the data driving chip is connected to the plurality of data lines, and the timing controller is connected to a signal source to receive signal data from the signal source.
6. The display device according to claim 1, wherein the display device is provided with a viewing angle switching key for switching different viewing angle modes, the viewing angle switching key is connected with the signal data processing module, and the signal data processing module determines the viewing angle mode of the display device according to a signal sent by the viewing angle switching key.
7. A driving method of a display device with switchable wide and narrow viewing angles, the display device comprising a display panel, the display panel being provided with a plurality of scanning lines and a plurality of data lines, the plurality of scanning lines and the plurality of data lines being mutually insulated, crossed and limited to form a plurality of pixel units arranged in an array, the driving method comprising:
in the wide viewing angle mode, signal data from a signal source is provided to each pixel unit of the display panel through the plurality of data lines, so that the display panel realizes wide viewing angle display;
in the narrow viewing angle mode, the signal data from the signal source is firstly subjected to step-type decreasing processing from the middle position of the display panel to two sides, and then the signal data subjected to the step-type decreasing processing is provided for each pixel unit of the display panel through the plurality of data lines so as to realize the step-type decreasing of the display brightness of the display panel from the middle position to the two sides.
8. The driving method as claimed in claim 7, wherein in the narrow viewing angle mode, the step-wise decreasing process is performed by gradually decreasing the signal data from the signal source from the middle of the display panel to both sides in a manner that the reduction percentage is gradually increased.
9. The driving method as claimed in claim 8, wherein in the narrow viewing angle mode, the signal data provided to each data line is reduced by a different reduction percentage value along either side direction from the middle position of the display panel.
10. The driving method as claimed in claim 8, wherein in the narrow viewing angle mode, the signal data is processed in a decreasing manner for each group of three data lines along any side direction from the middle position to the two sides of the display panel, and the signal data provided to the three data lines of the same group is processed in a decreasing manner by the same reduction percentage value.
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| CN201710597193.7A CN107255873B (en) | 2017-07-20 | 2017-07-20 | Display device with switchable wide and narrow viewing angles and driving method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI632540B (en) * | 2018-01-15 | 2018-08-11 | 友達光電股份有限公司 | Display apparatus and method of switching viewing angle thereof |
| CN208705623U (en) * | 2018-09-27 | 2019-04-05 | 昆山龙腾光电有限公司 | The changeable display device in width visual angle |
| CN110415652B (en) * | 2019-07-03 | 2021-03-23 | 昆山龙腾光电股份有限公司 | Display driving method and display driving circuit |
| CN110415654B (en) * | 2019-07-23 | 2020-12-29 | 昆山龙腾光电股份有限公司 | LED driving chip, LED driving method and liquid crystal display device |
| CN114255713A (en) * | 2020-09-24 | 2022-03-29 | 京东方科技集团股份有限公司 | Backlight module, display device and control method thereof |
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