CN107144989B - Wide-narrow visual angle switching module and liquid crystal display device - Google Patents
Wide-narrow visual angle switching module and liquid crystal display device Download PDFInfo
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- CN107144989B CN107144989B CN201710418062.8A CN201710418062A CN107144989B CN 107144989 B CN107144989 B CN 107144989B CN 201710418062 A CN201710418062 A CN 201710418062A CN 107144989 B CN107144989 B CN 107144989B
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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
- G09G3/3611—Control of matrices with row and column drivers
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Abstract
The invention discloses a wide and narrow visual angle switching module and a liquid crystal display device, wherein the wide and narrow visual angle switching module comprises a connector, a signal processor and a time sequence controller; the display interface signal and the power supply signal are output to the time sequence controller through the connector; the wide and narrow visual angle control signals are output to the signal processor through the connector; the signal processor receives the wide and narrow viewing angle control signal, selects a wide viewing angle code or a narrow viewing angle code according to the wide and narrow viewing angle control signal, and outputs the selected wide viewing angle code or narrow viewing angle code to the time sequence controller; the timing controller receives the wide viewing angle code or the narrow viewing angle code and outputs the same to the display panel. The wide and narrow visual angle switching module and the liquid crystal display device disclosed by the invention take the image quality of the wide and narrow visual angles and the switching time of the wide and narrow visual angles into consideration, and avoid the problems of power failure restart of the time schedule controller and overlong switching time during switching of the wide and narrow visual angles after the PSR signal of the time schedule controller is started.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a wide and narrow visual angle switching module and a liquid crystal display device.
Background
Since the lcd device has many advantages of lightness, thinness, energy saving, no radiation, etc., it is widely used in electronic devices such as televisions, personal computers, tablet computers, Personal Digital Assistants (PDAs), mobile phones, digital cameras, etc. The liquid crystal display device has different operation modes, such as 6/8bit display mode or wide and narrow viewing angle display mode. For example, when a user wants to switch from the wide viewing angle mode to the narrow viewing angle mode when using the liquid crystal display device, or when the user wants to switch from the narrow viewing angle mode to the wide viewing angle mode when using the liquid crystal display device, the user needs to shut down the liquid crystal display device for switching and then restart the liquid crystal display device, so that information displayed in the liquid crystal display device is protected, and the purpose of avoiding leakage of privacy or business information or sharing information is achieved.
In the process of implementing the invention, the inventor finds that the prior art has the following problems: when a Self-Refresh signal (PSR) function is turned on to switch between wide and narrow viewing angles, different display codes must be switched between the wide and narrow viewing angles in order to meet the image quality requirement of the wide viewing angle/the narrow viewing angle; the problem that the switching time of the wide and narrow visual angles is too long due to power-off restart of the time sequence controller in the process of switching the display codes occurs.
Disclosure of Invention
The present invention is directed to a wide and narrow viewing angle switching module and a liquid crystal display device, and aims to solve the problem that the prior art cannot simultaneously meet the requirements of wide viewing angle/narrow viewing angle image quality and the switching time of wide and narrow viewing angles when a Self-Refresh signal (PSR) function is turned on to switch the wide and narrow viewing angles.
In order to achieve the above object, a first aspect of embodiments of the present invention provides a wide and narrow viewing angle switching module, where the wide and narrow viewing angle switching module includes a connector, a signal processor, and a timing controller;
the display interface signal and the power supply signal are output to the time sequence controller through the connector;
the wide and narrow visual angle control signals are output to the signal processor through the connector;
the signal processor receives the wide and narrow viewing angle control signal, selects a wide viewing angle code or a narrow viewing angle code according to the wide and narrow viewing angle control signal, and outputs the selected wide viewing angle code or narrow viewing angle code to the time sequence controller;
the time schedule controller receives the wide view angle code or the narrow view angle code and outputs the code to the display panel;
the signal processor comprises a first switch, a second switch, a switching module, a wide visual angle control module, a narrow visual angle control module and an output module;
the input end of the first switch is connected with the wide viewing angle control module, the output end of the first switch is connected with the output module, and the control end of the first switch is connected with the switching module;
the input end of the second switch is connected with the narrow viewing angle control module, the output end of the second switch is connected with the output module, and the control end of the second switch is connected with the switching module;
the switching module is used for controlling the first switch or the second switch to be switched on and off according to the wide and narrow visual angle control signal;
the wide view angle control module is used for storing wide view angle codes and outputting the stored wide view angle codes to the output module after the first switch is switched on and the second switch is switched off;
the narrow viewing angle control module is used for storing a narrow viewing angle code and outputting the stored narrow viewing angle code to the output module after the first switch is switched off and the second switch is switched on;
and the output module is used for receiving the wide view angle code or the narrow view angle code and outputting the wide view angle code or the narrow view angle code to the time sequence controller.
Further, if the wide-narrow viewing angle control signal is a first level, the switching module controls the first switch to be turned on and controls the second switch to be turned off;
if the wide and narrow viewing angle control signal is a second level, the switching module controls the first switch to be switched off and controls the second switch to be switched on.
Further, the first level is a low level, and the second level is a high level; or the first level is a high level and the second level is a low level.
Further, the output module is further configured to receive a wide view code or a narrow view code, convert the received wide view code or narrow view code into a wide view code or a narrow view code of a standard I2C protocol, and output the converted wide view code or narrow view code to the timing controller.
Further, the wide and narrow viewing angle switching module further comprises a memory;
the memory is used for storing the wide view angle code and outputting the stored wide view angle code to the time sequence controller after the time sequence controller is started.
Further, the memory includes an electrically erasable read only memory or a flash memory.
Further, the display interface signal comprises a low voltage differential signal, a minimal transmission differential signal, or an embedded display interface signal.
Further, the first switch and the second switch comprise metal oxide semiconductor field effect transistors or triodes.
In addition, to achieve the above object, a second aspect of embodiments of the present invention provides a liquid crystal display device, which includes a display panel and the wide and narrow viewing angle switching module of the first aspect.
According to the wide and narrow visual angle switching module and the liquid crystal display device provided by the embodiment of the invention, the wide visual angle code or the narrow visual angle code is selected by the signal processor to be output to the time sequence controller, and is output to the display panel by the time sequence controller; the image quality of the wide and narrow viewing angles and the switching time of the wide and narrow viewing angles are considered, and the problems of power-off restart of the time schedule controller and overlong switching time during switching of the wide and narrow viewing angles after a self-refresh signal (PSR) of the time schedule controller is started are solved.
Drawings
Fig. 1 is a schematic structural diagram of a wide-narrow viewing angle switching module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a signal processor in a wide and narrow viewing angle switching module according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a timing signal structure of a wide and narrow viewing angle switching module according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating a wide-narrow viewing angle switching process according to an embodiment of the present 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
The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
In the following description, numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of the devices are described in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
First embodiment
As shown in fig. 1, a first embodiment of the present invention provides a wide and narrow viewing angle switching module, which includes a connector, a signal processor, and a timing controller;
the display interface signal and the power supply signal are output to the time sequence controller through the connector;
in this embodiment, the display interface signal may include a Low-Voltage differential signaling (LVDS), a Transition Minimized Differential Signaling (TMDS), and an Embedded display interface signal (eDP).
A wide and narrow Viewing Angle (HVA, also called Hybrid Viewing Angle) control signal is output to the signal processor through the connector;
in this embodiment, the wide and narrow viewing angle control signal outputted through the connector is at a high level (H) or a low level (L), and the default wide and narrow viewing angle control signal is at a low level (L).
The signal processor receives the wide and narrow viewing angle control signal, selects a wide viewing angle code or a narrow viewing angle code according to the wide and narrow viewing angle control signal, and outputs the selected wide viewing angle code or narrow viewing angle code to the time schedule controller;
referring to fig. 2, in the present embodiment, the signal processor includes a first switch T1, a second switch T2, a switching module, a wide viewing angle control module, a narrow viewing angle control module, and an output module;
the input end of the first switch T1 is connected with the wide viewing angle control module, the output end of the first switch T1 is connected with the output module, and the control end of the first switch T1 is connected with the switching module;
an input end of the second switch T2 is connected with the narrow viewing angle control module, an output end of the second switch T2 is connected with the output module, and a control end of the second switch T2 is connected with the switching module;
the switching module is configured to control the first switch T1 or the second switch T2 to be turned on and off according to the wide and narrow viewing angle control signal;
specifically, if the wide-narrow viewing angle control signal is at a low level, the switching module controls the first switch T1 to be turned on and controls the second switch T2 to be turned off;
if the wide-narrow viewing angle control signal is at a high level, the switching module controls the first switch T1 to be turned off and controls the second switch T2 to be turned on.
It should be noted that, if the wide and narrow viewing angle control signal is at a high level, the switching module controls the first switch T1 to be turned on and controls the second switch T2 to be turned off; if the wide-narrow viewing angle control signal is at a low level, the switching module may control the first switch T1 to be turned off and the second switch T2 to be turned on.
In this embodiment, the first switch and the second switch include a metal oxide semiconductor field effect transistor and a triode. Taking the first switch T1 and the second switch T2 as nmos fets for example, the control terminal of the first switch T1 is the gate, the input terminal of the first switch T1 is the drain, and the output terminal of the first switch T1 is the source; the control terminal of the second switch T2 is a gate, the input terminal of the second switch T2 is a drain, and the output terminal of the second switch T2 is a source.
The wide view control module is configured to store a wide view code, and output the stored wide view code to the output module after the first switch T1 is turned on and the second switch T2 is turned off;
in the present embodiment, the stored wide view angle code includes, but is not limited to, Gamma voltage (Gamma) at a wide view angle, Adaptive Color Control (Acc), Frame Rate frequency Control (FRC), Motion Estimation and Motion Compensation (MEMC), Spread Spectrum Control (SSC), Dynamic Backlight Control (DBC), Black Frame Insertion (BFI), Infinite Color Technology (ICT), and the like.
The narrow viewing angle control module is configured to store a narrow viewing angle code, and output the stored narrow viewing angle code to the output module after the first switch is turned off and the second switch T2 is turned on;
in the present embodiment, the stored narrow-view code may include Gamma voltage (Gamma) at a narrow view angle, Adaptive Color Control (Acc), Frame Rate frequency Control (FRC), Motion Estimation and Motion Compensation (MEMC), Spread Spectrum Control (SSC), Dynamic Backlight Control (DBC), Black Frame Insertion (BFI), Infinite Color Technology (ICT), and the like.
And the output module is used for receiving the wide view angle code or the narrow view angle code and outputting the wide view angle code or the narrow view angle code to the time sequence controller.
In this embodiment, the output module receives a wide view code or a narrow view code, converts the received wide view code or narrow view code into a wide view code or narrow view code of a standard I2C protocol, and outputs the converted wide view code or narrow view code to the timing controller. For example, via an I2C bus (SCL, SDA).
The timing controller receives the wide viewing angle code or the narrow viewing angle code and outputs the same to the display panel.
Further, referring to fig. 1 again, the wide and narrow viewing angle switching module further includes a memory;
the memory is used for storing the wide view angle code and outputting the stored wide view angle code to the time sequence controller after the time sequence controller is started.
In this embodiment, the Memory may be an Electrically erasable Read-Only Memory (EEPROM) or a Flash Memory (Flash Memory).
For example: the power supply signal is output to the time schedule controller through the connector for time schedule, and the time schedule controller acquires the power supply and starts; a wide and narrow viewing angle control signal (default low level signal) is output to the signal processor through the connector; the time schedule controller reads the wide view angle code stored in the memory from the memory; and outputting the wide-view code to the display panel after reading.
Referring to fig. 3, fig. 3 is a diagram illustrating a timing signal structure among a wide and narrow viewing angle control signal, a backlight signal (BL _ ON), and a Display panel signal (Display).
When the wide and narrow visual angle control signal (HVA) is in low level, the time sequence controller outputs a wide visual angle code to the display panel; when the wide and narrow visual angle control signal is at high level, the time sequence controller outputs a narrow visual angle code to the display panel; the B time in the figure is the wide and narrow viewing angle switching time.
Wherein, when the backlight signal (BL _ ON) is high level, the backlight is turned ON, otherwise, the backlight is turned off. In the figure, time a is the backlight turn-off time, and time D is the backlight turn-on time.
When the Display panel signal (Display) is at a high level, the Display panel is turned on, and otherwise, the Display panel is turned off. Time C in the figure shows the panel opening time.
The following relationship exists between the three signals:
1. t1>0, where T1 is the difference between time B and time a, that is, the time when the backlight is turned off must be earlier than the time when the switching of the wide and narrow viewing angles is started, so as to avoid outputting an abnormal signal when the wide and narrow viewing angles are switched;
2. t2> -N × T1, where T2 is the difference between time C and time B, i.e., the time N × T1 required for the signal processor to output N data to the timing controller, where T1 is the time required to output one data;
3. t3>0, where T3 is the difference between D and C, i.e. the turn-on time of the display panel must be earlier than the turn-on time of the backlight.
For better understanding of the present invention, the following description is made with reference to fig. 4, in which fig. 4 assumes that the hardware address of the timing controller is 0xC2, the start address of the wide view control block of the timing controller is 0x92D0, the start address of the narrow view control block of the timing controller is 0x112D0, and the Gamma values to be written are 14 sets of Gamma values. The wide and narrow viewing angle switching step includes:
step 2, if the HVA signal is low level, the signal processor addresses the hardware address 0xC2 of the time schedule controller and addresses the initial address 0x92D0 of the wide viewing angle control module of the time schedule controller, the signal processor starts to write 14 groups of Gamma values from the initial address, and the time schedule controller generates corresponding Gamma voltage values to output to the display panel;
and 3, if the HVA signal is in a high level, the signal processor addresses a hardware address 0xC2 of the time schedule controller and addresses a starting address 0x112D0 of a narrow viewing angle control module of the time schedule controller, the signal processor writes 14 groups of Gamma values from the starting address, and the time schedule controller generates corresponding Gamma voltage values and outputs the Gamma voltage values to the display panel.
According to the wide and narrow visual angle switching module provided by the embodiment of the invention, the wide visual angle code or the narrow visual angle code is selected by the signal processor to be output to the time sequence controller, and is output to the display panel by the time sequence controller; the image quality of the wide and narrow viewing angles and the switching time of the wide and narrow viewing angles are considered, and the problems of power-off restart of the time schedule controller and overlong switching time during switching of the wide and narrow viewing angles after a Self-Refresh signal (PSR) of the time schedule controller is started are solved.
Second embodiment
A second embodiment of the present invention provides a liquid crystal display device, which includes a display panel and a wide and narrow viewing angle switching module;
as in the first embodiment, the wide and narrow viewing angle switching module includes a connector, a signal processor, and a timing controller;
the display interface signal and the power supply signal are output to the time sequence controller through the connector;
in this embodiment, the display interface signal may include a Low-Voltage differential signaling (LVDS), a Transition Minimized Differential Signaling (TMDS), and an Embedded display interface signal (eDP).
A wide and narrow Viewing Angle (HVA, also called Hybrid Viewing Angle) control signal is output to the signal processor through the connector;
in this embodiment, the wide and narrow viewing angle control signal outputted through the connector is at a high level (H) or a low level (L), and the default wide and narrow viewing angle control signal is at a low level (L).
The signal processor receives the wide and narrow viewing angle control signal, selects a wide viewing angle code or a narrow viewing angle code according to the wide and narrow viewing angle control signal, and outputs the selected wide viewing angle code or narrow viewing angle code to the time sequence controller;
in this embodiment, the signal processor includes a first switch T1, a second switch T2, a switching module, a wide viewing angle control module, a narrow viewing angle control module, and an output module;
the input end of the first switch T1 is connected with the wide viewing angle control module, the output end of the first switch T1 is connected with the output module, and the control end of the first switch T1 is connected with the switching module;
an input end of the second switch T2 is connected with the narrow viewing angle control module, an output end of the second switch T2 is connected with the output module, and a control end of the second switch T2 is connected with the switching module;
the switching module is configured to control the first switch T1 or the second switch T2 to be turned on and off according to the wide and narrow viewing angle control signal;
specifically, if the wide-narrow viewing angle control signal is at a low level, the switching module controls the first switch T1 to be turned on and controls the second switch T2 to be turned off;
if the wide-narrow viewing angle control signal is at a high level, the switching module controls the first switch T1 to be turned off and controls the second switch T2 to be turned on.
It should be noted that, if the wide and narrow viewing angle control signal is at a high level, the switching module controls the first switch T1 to be turned on and controls the second switch T2 to be turned off; if the wide-narrow viewing angle control signal is at a low level, the switching module may control the first switch T1 to be turned off and the second switch T2 to be turned on.
In this embodiment, the first switch and the second switch include a metal oxide semiconductor field effect transistor and a triode. Taking the first switch T1 and the second switch T2 as nmos fets for example, the control terminal of the first switch T1 is the gate, the input terminal of the first switch T1 is the drain, and the output terminal of the first switch T1 is the source; the control terminal of the second switch T2 is a gate, the input terminal of the second switch T2 is a drain, and the output terminal of the second switch T2 is a source.
The wide view control module is configured to store a wide view code, and output the stored wide view code to the output module after the first switch T1 is turned on and the second switch T2 is turned off;
in the present embodiment, the stored wide view angle code includes, but is not limited to, Gamma voltage (Gamma) at a wide view angle, Adaptive Color Control (Acc), Frame Rate frequency Control (FRC), Motion Estimation and Motion Compensation (MEMC), Spread Spectrum Control (SSC), Dynamic Backlight Control (DBC), Black Frame Insertion (BFI), Infinite Color Technology (ICT), and the like.
The narrow viewing angle control module is configured to store a narrow viewing angle code, and output the stored narrow viewing angle code to the output module after the first switch is turned off and the second switch T2 is turned on;
in the present embodiment, the stored narrow-view code may include Gamma voltage (Gamma) at a narrow view angle, Adaptive Color Control (Acc), Frame Rate frequency Control (FRC), Motion Estimation and Motion Compensation (MEMC), Spread Spectrum Control (SSC), Dynamic Backlight Control (DBC), Black Frame Insertion (BFI), Infinite Color Technology (ICT), and the like.
And the output module is used for receiving the wide view angle code or the narrow view angle code and outputting the wide view angle code or the narrow view angle code to the time sequence controller.
In this embodiment, the output module receives a wide view code or a narrow view code, converts the received wide view code or narrow view code into a wide view code or narrow view code of a standard I2C protocol, and outputs the converted wide view code or narrow view code to the timing controller. For example, via an I2C bus (SCL, SDA).
The timing controller receives the wide viewing angle code or the narrow viewing angle code and outputs the same to the display panel.
Further, the wide and narrow viewing angle switching module further comprises a memory;
the memory is used for storing the wide view angle code and outputting the stored wide view angle code to the time sequence controller after the time sequence controller is started.
In this embodiment, the Memory may be an Electrically erasable Read-Only Memory (EEPROM) or a Flash Memory (Flash Memory).
For example: the power supply signal is output to the time schedule controller through the connector for time schedule, and the time schedule controller acquires the power supply and starts; a wide and narrow viewing angle control signal (default low level signal) is output to the signal processor through the connector; the time schedule controller reads the wide view angle code stored in the memory from the memory; and outputting the wide-view code to the display panel after reading.
Referring to fig. 3, fig. 3 is a diagram illustrating a timing signal structure among a wide and narrow viewing angle control signal, a backlight signal (BL _ ON), and a Display panel signal (Display).
When the wide and narrow visual angle control signal (HVA) is in low level, the time sequence controller outputs a wide visual angle code to the display panel; when the wide and narrow visual angle control signal is at high level, the time sequence controller outputs a narrow visual angle code to the display panel; the B time in the figure is the wide and narrow viewing angle switching time.
Wherein, when the backlight signal (BL _ ON) is high level, the backlight is turned ON, otherwise, the backlight is turned off. In the figure, time a is the backlight turn-off time, and time D is the backlight turn-on time.
When the Display panel signal (Display) is at a high level, the Display panel is turned on, and otherwise, the Display panel is turned off. Time C in the figure shows the panel opening time.
The following relationship exists between the three signals:
1. t1>0, where T1 is the difference between time B and time a, that is, the time when the backlight is turned off must be earlier than the time when the switching of the wide and narrow viewing angles is started, so as to avoid outputting an abnormal signal when the wide and narrow viewing angles are switched;
2. t2> -N × T1, where T2 is the difference between time C and time B, i.e., the time N × T1 required for the signal processor to output N data to the timing controller, where T1 is the time required to output one data;
3. t3>0, where T3 is the difference between D and C, i.e. the turn-on time of the display panel must be earlier than the turn-on time of the backlight.
According to the liquid crystal display device provided by the embodiment of the invention, the wide visual angle code or the narrow visual angle code is selected by the signal processor to be output to the time sequence controller, and is output to the display panel by the time sequence controller; the image quality of the wide and narrow viewing angles and the switching time of the wide and narrow viewing angles are considered, and the problems of power-off restart of the time schedule controller and overlong switching time during switching of the wide and narrow viewing angles after a Self-Refresh signal (PSR) of the time schedule controller is started are solved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.
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 invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. A wide and narrow visual angle switching module comprises a connector, a signal processor and a time sequence controller;
the display interface signal and the power supply signal are output to the time sequence controller through the connector;
the wide and narrow visual angle control signals are output to the signal processor through the connector;
the signal processor receives the wide and narrow viewing angle control signal, selects a wide viewing angle code or a narrow viewing angle code according to the wide and narrow viewing angle control signal, and outputs the selected wide viewing angle code or narrow viewing angle code to the time sequence controller;
the time schedule controller receives the wide view angle code or the narrow view angle code and outputs the code to the display panel;
the signal processor comprises a first switch, a second switch, a switching module, a wide visual angle control module, a narrow visual angle control module and an output module;
the input end of the first switch is connected with the wide viewing angle control module, the output end of the first switch is connected with the output module, and the control end of the first switch is connected with the switching module;
the input end of the second switch is connected with the narrow viewing angle control module, the output end of the second switch is connected with the output module, and the control end of the second switch is connected with the switching module;
the switching module is used for controlling the first switch or the second switch to be switched on and off according to the wide and narrow visual angle control signal;
the wide view angle control module is used for storing wide view angle codes and outputting the stored wide view angle codes to the output module after the first switch is switched on and the second switch is switched off;
the narrow viewing angle control module is used for storing a narrow viewing angle code and outputting the stored narrow viewing angle code to the output module after the first switch is switched off and the second switch is switched on;
and the output module is used for receiving the wide view angle code or the narrow view angle code and outputting the wide view angle code or the narrow view angle code to the time sequence controller.
2. The wide-narrow viewing angle switching module according to claim 1,
if the wide and narrow viewing angle control signal is a first level, the switching module controls the first switch to be switched on and controls the second switch to be switched off;
if the wide and narrow viewing angle control signal is a second level, the switching module controls the first switch to be switched off and controls the second switch to be switched on.
3. The wide-narrow viewing angle switching module according to claim 2, wherein the first level is a low level, and the second level is a high level; or
The first level is a high level and the second level is a low level.
4. The wide-narrow viewing angle switching module according to claim 1, wherein the output module is further configured to receive a wide viewing angle code or a narrow viewing angle code, convert the received wide viewing angle code or narrow viewing angle code into a wide viewing angle code or a narrow viewing angle code of a standard I2C protocol, and output the converted wide viewing angle code or narrow viewing angle code to the timing controller.
5. The switching module of wide and narrow viewing angles according to any of claims 1 to 4, wherein said switching module of wide and narrow viewing angles further comprises a memory;
the memory is used for storing the wide view angle code and outputting the stored wide view angle code to the time sequence controller after the time sequence controller is started.
6. The wide-narrow viewing angle switching module of claim 5, wherein the memory comprises an electrically erasable read-only memory or a flash memory.
7. The wide-narrow viewing angle switching module according to any one of claims 1 to 4, wherein the display interface signal comprises a low voltage differential signal, a minimum transmission differential signal or an embedded display interface signal.
8. The switching module of any of claims 1-4, wherein the first switch and the second switch comprise metal oxide semiconductor field effect transistors or transistors.
9. A liquid crystal display device comprising a display panel and the switching module of wide and narrow viewing angles according to any one of claims 1 to 8.
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| CN108646445B (en) * | 2018-05-03 | 2021-03-16 | 武汉精测电子集团股份有限公司 | Defect detection device that self-adaptation is shaded |
| CN208806052U (en) * | 2018-09-30 | 2019-04-30 | 惠科股份有限公司 | Display panel, drive circuit and display device |
| CN109166548B (en) * | 2018-10-08 | 2020-10-30 | 昆山龙腾光电股份有限公司 | Liquid crystal display with wide and narrow viewing angle switching |
| CN109410816A (en) * | 2018-11-23 | 2019-03-01 | 惠科股份有限公司 | Display device and its driving method |
| CN110675796B (en) * | 2019-09-25 | 2022-08-02 | 昆山龙腾光电股份有限公司 | Wide-narrow viewing angle switching circuit, display device and viewing angle control method |
| CN111429855B (en) * | 2020-04-03 | 2022-03-01 | 昆山龙腾光电股份有限公司 | Visual angle switching circuit and display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101276560A (en) * | 2007-03-30 | 2008-10-01 | 三星电子株式会社 | Circuit board and liquid crystal display including the same |
| CN106409256A (en) * | 2016-11-03 | 2017-02-15 | 昆山龙腾光电有限公司 | Gamma voltage generation circuit and liquid crystal display device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101271523B1 (en) * | 2006-04-20 | 2013-06-05 | 엘지디스플레이 주식회사 | Liquid crystal display device of viewing angle control |
| CN104537998A (en) * | 2015-01-06 | 2015-04-22 | 友达光电股份有限公司 | Control circuit and method used for liquid crystal display device |
| CN105185344B (en) * | 2015-10-16 | 2017-11-03 | 昆山龙腾光电有限公司 | Power-switching circuit and display device for view angle switch |
| CN105390106B (en) * | 2015-12-07 | 2018-12-21 | 深圳市华星光电技术有限公司 | The level shifting circuit and level conversion method of liquid crystal display panel of thin film transistor |
| CN105632442B (en) * | 2016-03-09 | 2018-01-16 | 昆山龙腾光电有限公司 | Code switching circuit and liquid crystal display device |
-
2017
- 2017-06-06 CN CN201710418062.8A patent/CN107144989B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101276560A (en) * | 2007-03-30 | 2008-10-01 | 三星电子株式会社 | Circuit board and liquid crystal display including the same |
| CN106409256A (en) * | 2016-11-03 | 2017-02-15 | 昆山龙腾光电有限公司 | Gamma voltage generation circuit and liquid crystal display device |
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