CN107357057B - Liquid crystal display device and narrow visual angle waveform self-adaptive adjustment method thereof - Google Patents
Liquid crystal display device and narrow visual angle waveform self-adaptive adjustment method thereof Download PDFInfo
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- CN107357057B CN107357057B CN201710665884.6A CN201710665884A CN107357057B CN 107357057 B CN107357057 B CN 107357057B CN 201710665884 A CN201710665884 A CN 201710665884A CN 107357057 B CN107357057 B CN 107357057B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 28
- 230000000007 visual effect Effects 0.000 title claims abstract description 21
- 230000003044 adaptive effect Effects 0.000 claims description 15
- 230000000630 rising effect Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 3
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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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Abstract
The invention discloses a liquid crystal display device and a narrow visual angle waveform self-adaptive adjusting method thereof, wherein the liquid crystal display device comprises a trigger, an interrupt controller, a signal processor, a counter, a memory, a digital-to-analog converter and a display panel; the trigger detects a trigger signal of a trigger waveform; the interrupt controller generates state flag information according to the acquired trigger signal; the signal processor controls the counter to count according to the state flag information generated by the interrupt controller; the device is also used for reading the narrow-view waveform data from the memory and sending the read narrow-view waveform data to the digital-to-analog converter if the counting of the counter reaches k × N; the digital-to-analog converter receives the narrow visual angle waveform data sent by the signal processor, converts the received narrow visual angle waveform data into a waveform point voltage value and outputs the waveform point voltage value to the display panel. The invention realizes the self-adaptive adjustment of the narrow-view-angle waveform along with the refresh rate, and solves the problems of waveform jitter and uneven point number distribution caused by an automatic distribution algorithm.
Description
Technical Field
The invention relates to the technical field of display, in particular to a liquid crystal display device and a narrow visual angle waveform self-adaptive adjusting method thereof.
Background
In the prior art, the narrow view waveform usually uses the frame start signal stv (start vertical) as the trigger signal. If the waveform only meets the narrow visual angle effect under a single frequency, self-adaptive adjustment is not needed; if the waveform needs to satisfy the narrow viewing angle effect under various frequencies, the synchronous signal needs to realize frequency self-adaptive adjustment along with the trigger signal. The waveform frequency adaptive adjustment can be realized by adopting the STV trigger, but the STV trigger has the following problems:
1) generally, the realization of the frequency self-adaptive adjustment needs an automatic point number distribution method, and the point number of the waveform needed by different frequencies is determined in a cycle counting mode. When the STV is triggered each time, the cycle counting can not be stopped in time, so that the waveform shakes, a display screen can flicker, and the waveform shaking can be reduced only by logic processing;
2) the more complex the waveform is, the more difficult it is to realize the adaptive adjustment of the waveform frequency by using the automatic point number distribution method, which may cause the problem of uneven point number distribution, thereby affecting the original shape of the waveform.
Disclosure of Invention
The invention mainly aims to provide a liquid crystal display device and a narrow visual angle waveform self-adaptive adjusting method thereof, and aims to solve the problem of STV triggering adopted in the prior art.
In order to achieve the above object, a first aspect of embodiments of the present invention provides a liquid crystal display device, where the liquid crystal display device includes a flip-flop, an interrupt controller, a signal processor, a counter, a memory, a digital-to-analog converter, and a display panel;
the trigger is used for detecting a trigger signal of a trigger waveform;
the interrupt controller is used for acquiring a trigger signal of a trigger waveform detected by the trigger and generating state flag information according to the acquired trigger signal;
the signal processor is used for controlling the counter to count according to the state flag information generated by the interrupt controller; the digital-to-analog converter is also used for reading the narrow-view waveform data from the memory and sending the read narrow-view waveform data to the digital-to-analog converter if the counting of the counter reaches k × N; wherein k is a positive integer, and N is the number of trigger signals required by the waveform point voltage value output by the digital-to-analog converter;
and the digital-to-analog converter is used for receiving the narrow visual angle waveform data sent by the signal processor, converting the received narrow visual angle waveform data into a waveform point voltage value and outputting the waveform point voltage value to the display panel.
Optionally, the frequency f1 of the trigger waveform follows the frequency f2 of the frame start signal STV, and the trigger waveform has M trigger signals in one period of the frame start signal STV, where M is greater than or equal to the minimum number of waveform points required by the narrow viewing angle;
the minimum time T1 of the waveform point voltage value output by the digital-to-analog converter is less than T2, wherein T2 is the minimum value of the time T of adjacent trigger signals.
Optionally, the number of bits of the digital-to-analog converter is determined according to N, M and the number of waveform points required by the narrow viewing angle.
Optionally, the signal processor is further configured to determine whether reading of the narrow-view waveform data in the memory is completed, and if not, control the counter to continue counting.
Optionally, the trigger signal is a rising edge trigger signal.
Further, to achieve the above object, a second aspect of embodiments of the present invention provides a narrow viewing angle waveform adaptive adjustment method of a liquid crystal display device, the method including the steps of:
detecting a trigger signal of a trigger waveform;
the interrupt controller acquires a trigger signal of the detected trigger waveform and generates state flag information according to the acquired trigger signal;
controlling a counter to count according to the state flag information generated by the interrupt controller;
if the counting of the counter reaches k × N, reading narrow-view waveform data from a memory; wherein k is a positive integer, and N is the number of trigger signals required by the waveform point voltage value output by the digital-to-analog converter;
the digital-to-analog converter converts the read narrow-view waveform data into a waveform point voltage value and outputs the waveform point voltage value to the display panel.
Optionally, the frequency f1 of the trigger waveform follows the frequency f2 of the frame start signal STV, and the trigger waveform has M trigger signals in one period of the frame start signal STV, where M is greater than or equal to the minimum number of waveform points required by the narrow viewing angle;
the minimum time T1 of the waveform point voltage value output by the digital-to-analog converter is less than T2, wherein T2 is the minimum value of the time T of adjacent trigger signals.
Optionally, the number of bits of the digital-to-analog converter is determined according to N, M and the number of waveform points required by the narrow viewing angle.
Optionally, the method further comprises the steps of:
judging whether the narrow visual angle waveform data in the memory is read completely;
and if the reading is not finished, controlling the counter to continue counting.
Optionally, the trigger signal is a rising edge trigger signal.
The invention provides a liquid crystal display device and a narrow visual angle waveform self-adaptive adjusting method thereof.A trigger signal of a trigger waveform is detected, narrow visual angle waveform data is read from a memory and converted into a waveform point voltage value to be output to a display panel; the method and the device realize the self-adaptive adjustment of the narrow-view waveform along with the refresh rate, solve the problem of waveform jitter and uneven point number distribution caused by an automatic distribution algorithm, and facilitate the realization and application of the narrow-view waveform.
Drawings
FIG. 1 is a schematic view of a liquid crystal display device according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a narrow viewing angle waveform adaptive adjustment method of an LCD device according to an embodiment of the present invention;
FIG. 3 is another flow chart of a narrow viewing angle waveform adaptive adjustment method for an LCD device according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a frame start signal STV and a trigger waveform according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of trigger waveforms and synchronization waveforms according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of a narrow viewing angle waveform adaptive adjustment process of the liquid crystal display device 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
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
Fig. 1 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present invention, and as shown in fig. 1, a first embodiment of the present invention provides a liquid crystal display device, which includes a flip-flop 11, an interrupt controller 12, a signal processor 13, a counter 14, a memory 15, a digital-to-analog converter 16, and a display panel (not shown in the figure);
a trigger 11 for detecting a trigger signal of a trigger waveform;
in this embodiment, the trigger signal is a rising edge trigger signal.
Fig. 4 is a schematic structural diagram of the frame start signal STV and the trigger waveforms according to the embodiment of the present invention, and referring to fig. 4, in the embodiment, the frequency f1 of the trigger waveform follows the frequency f2 of the frame start signal STV, i.e., f1 is f2, and the trigger waveform has M trigger signals in one period of the frame start signal STV, where M ≧ the minimum waveform point number required for a narrow viewing angle.
It should be noted that the blank region in fig. 4 is not necessary for the trigger waveform.
Fig. 5 is a schematic structural diagram of the trigger waveform and the synchronization waveform according to the embodiment of the invention, and referring to fig. 5, the minimum time T1 of the waveform point voltage value output by the dac 16 is smaller than T2, where T2 is the minimum value of the time T of the adjacent trigger signal, that is, when the frequency f1 of the trigger waveform is maximum, the corresponding time T is the minimum value of the time T of the adjacent trigger signal.
It should be noted that if the minimum time T1 of the waveform point voltage value output by the dac 16 is greater than T2, the counter 14 may generate a counting error due to the too long time T1, and thus the synchronous waveform output cannot be realized.
N in fig. 5 is the number of trigger signals required for the waveform point voltage value output by the digital-to-analog converter 16. Th is the holding time of the waveform point voltage value, and Th is N × t.
An interrupt controller 12, configured to acquire a trigger signal of a trigger waveform detected by the trigger 11, and generate state flag information according to the acquired trigger signal;
a signal processor 13 for controlling the counter 14 to count according to the status flag information generated by the interrupt controller 12; the digital-to-analog converter 16 is further configured to read the narrow-view waveform data from the memory 15 and send the read narrow-view waveform data to the digital-to-analog converter 15 if the count of the counter 14 reaches k × N; wherein k is a positive integer, and N is the number of trigger signals required for the waveform point voltage value output by the digital-to-analog converter 16;
in another embodiment, the signal processor 13 is further configured to determine whether the narrow viewing angle waveform data in the memory 15 has been completely read, and if not, control the counter 14 to continue counting.
And the digital-to-analog converter 16 is used for receiving the narrow viewing angle waveform data sent by the signal processor 13, converting the received narrow viewing angle waveform data into a waveform point voltage value and outputting the waveform point voltage value to the display panel.
In the present embodiment, the number of bits of the dac 16 is determined according to N, M and the number of waveform points required for a narrow viewing angle.
For example: when M is 1080 and N is 6 in the trigger waveform, i.e. triggering once every 6 rising edges, the number of waveform points required for a narrow viewing angle is M/N180, and if a digital-to-analog converter is selected, 7 bits (bit) can be satisfied. However, if N is equal to 1, the number of waveform points required for a narrow viewing angle is M/N1080, which is greatly beyond the range of 7 bits (bit), and in this case, the digital-to-analog converter 16 may select 10 bits (bit), i.e., a maximum value of 1024.
Referring to fig. 6 again, fig. 6 is a schematic flow chart of a narrow viewing angle waveform adaptive adjustment process of the liquid crystal display device according to the embodiment of the invention. The narrow visual angle waveform self-adaptive adjustment process of the liquid crystal display device is as follows:
at the beginning, the signal processor 13 turns on the interrupt controller 12, and after obtaining the rising edge trigger signal, the counter 14 (represented by the variable count) starts to increment by 1 from 0; judging whether the value of the count can be divided by N, if so, reading the waveform data in the memory 15, otherwise, continuing to increment the count by 1 until the value of the count can be divided by N; at the same time, recording the position of the waveform data in the memory 15 through the variable i so as to output the next waveform data; continuously judging whether the count reaches the total number of the trigger signals, if so, indicating that the waveform data output is finished; at this time, count and i are all cleared to 0, and the next trigger signal is waited for.
According to the liquid crystal display device provided by the embodiment of the invention, by detecting the trigger signal of the trigger waveform, narrow-view-angle waveform data is read from the memory and converted into a waveform point voltage value to be output to the display panel; the method and the device realize the self-adaptive adjustment of the narrow-view waveform along with the refresh rate, solve the problem of waveform jitter and uneven point number distribution caused by an automatic distribution algorithm, and facilitate the realization and application of the narrow-view waveform.
Second embodiment
Referring to fig. 2, fig. 2 is a diagram illustrating a narrow viewing angle waveform adaptive adjustment method for an lcd device according to a second embodiment of the present invention. The narrow visual angle waveform self-adaptive adjusting method comprises the following steps:
21. detecting a trigger signal of a trigger waveform;
in this embodiment, the trigger signal is a rising edge trigger signal.
Referring to fig. 4, in the present embodiment, the frequency f1 of the trigger waveform follows the frequency f2 of the frame start signal STV, i.e., f1 ═ f2, and the trigger waveform has M trigger signals in one period of the frame start signal STV, where M ≧ the minimum number of waveform points required for a narrow viewing angle.
It should be noted that the blank region in fig. 4 is not necessary for the trigger waveform.
Referring to fig. 5, the minimum time T1 of the waveform point voltage value output by the dac 16 is smaller than T2, where T2 is the minimum value of the time T of the adjacent trigger signal, that is, when the frequency f1 of the trigger waveform is maximum, the corresponding time T is the minimum value of the time T of the adjacent trigger signal.
It should be noted that if the minimum time T1 of the waveform point voltage value output by the dac 16 is greater than T2, the counter 14 may generate a counting error due to the too long time T1, and thus the synchronous waveform output cannot be realized.
N in fig. 5 is the number of trigger signals required for the waveform point voltage value output by the digital-to-analog converter 16. Th is the holding time of the waveform point voltage value, and Th is N × t.
22. The interrupt controller 12 acquires a trigger signal of the detected trigger waveform, and generates state flag information according to the acquired trigger signal;
23. controlling the counter 14 to count according to the status flag information generated by the interrupt controller 12;
24. reading the narrow-view waveform data from the memory 15 if the count of the counter 14 reaches k × N; wherein k is a positive integer, and N is the number of trigger signals required for the waveform point voltage value output by the digital-to-analog converter 16;
25. the digital-to-analog converter 16 converts the read narrow viewing angle waveform data into a waveform point voltage value and outputs it to the display panel.
In the present embodiment, the number of bits of the dac 16 is determined according to N, M and the number of waveform points required for a narrow viewing angle.
For example: when M is 1080 and N is 6 in the trigger waveform, i.e. triggering once every 6 rising edges, the number of waveform points required for a narrow viewing angle is M/N180, and if a digital-to-analog converter is selected, 7 bits (bit) can be satisfied. However, if N is 1, the number of waveform points required for a narrow viewing angle is 1080, which is greatly beyond the range of 7 bits (bit), and in this case, the digital-to-analog converter can select 10 bits (bit), i.e. the maximum value is 1024.
Fig. 3 is another flow chart of a narrow viewing angle waveform adaptive adjustment method of a liquid crystal display device according to an embodiment of the present invention, referring to fig. 3, the method further includes the steps of:
26. judging whether the narrow-view waveform data in the memory 15 is read completely; if the reading is not completed, the counter 14 is controlled to continue counting.
As an example, please refer to fig. 6 again, fig. 6 is a schematic flow chart of a narrow viewing angle waveform adaptive adjustment process of the liquid crystal display device according to the embodiment of the invention. The narrow visual angle waveform self-adaptive adjustment process of the liquid crystal display device is as follows:
at the beginning, the signal processor 13 turns on the interrupt controller 12, and after obtaining the rising edge trigger signal, the counter 14 (represented by the variable count) starts to increment by 1 from 0; judging whether the value of the count can be divided by N, if so, reading the waveform data in the memory 15, otherwise, continuing to increment the count by 1 until the value of the count can be divided by N; at the same time, recording the position of the waveform data in the memory 15 through the variable i so as to output the next waveform data; continuously judging whether the count reaches the total number of the trigger signals, if so, indicating that the waveform data output is finished; at this time, count and i are all cleared to 0, and the next trigger signal is waited for.
According to the narrow visual angle waveform self-adaptive adjusting method of the liquid crystal display device, the trigger signal of the trigger waveform is detected, narrow visual angle waveform data are read from the memory and converted into waveform point voltage values to be output to the display panel; the method and the device realize the self-adaptive adjustment of the narrow-view waveform along with the refresh rate, solve the problem of waveform jitter and uneven point number distribution caused by an automatic distribution algorithm, and facilitate the realization and application of the narrow-view waveform.
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 (10)
1. A liquid crystal display device comprises a trigger, an interrupt controller, a signal processor, a counter, a memory, a digital-to-analog converter and a display panel,
the trigger is used for detecting a trigger signal of a trigger waveform;
the interrupt controller is used for acquiring a trigger signal of a trigger waveform detected by the trigger and generating state flag information according to the acquired trigger signal;
the signal processor is used for controlling the counter to count according to the state flag information generated by the interrupt controller; the digital-to-analog converter is also used for reading the narrow-view waveform data from the memory and sending the read narrow-view waveform data to the digital-to-analog converter if the counting of the counter reaches k × N; wherein k is a positive integer, and N is the number of trigger signals required by the waveform point voltage value output by the digital-to-analog converter;
and the digital-to-analog converter is used for receiving the narrow visual angle waveform data sent by the signal processor, converting the received narrow visual angle waveform data into a waveform point voltage value and outputting the waveform point voltage value to the display panel.
2. The liquid crystal display device of claim 1, wherein the frequency f1 of the trigger waveform follows the frequency f2 of the frame start signal STV, and the trigger waveform has M trigger signals in one period of the frame start signal STV, wherein M ≧ the minimum number of waveform points required for a narrow viewing angle;
the minimum time T1 of the waveform point voltage value output by the digital-to-analog converter is less than T2, wherein T2 is the minimum value of the time T of adjacent trigger signals.
3. The liquid crystal display device of claim 2, wherein the number of bits of the dac is determined according to N, M and the number of waveform points required for a narrow viewing angle.
4. The liquid crystal display device according to any of claims 1-3, wherein the signal processor is further configured to determine whether the narrow viewing angle waveform data in the memory has been read, and if not, control the counter to continue counting.
5. The liquid crystal display device according to any of claims 1-3, wherein the trigger signal is a rising edge trigger signal.
6. A narrow viewing angle waveform adaptive adjustment method of a liquid crystal display device, the method comprising the steps of:
detecting a trigger signal of a trigger waveform;
the interrupt controller acquires a trigger signal of the detected trigger waveform and generates state flag information according to the acquired trigger signal;
controlling a counter to count according to the state flag information generated by the interrupt controller;
if the counting of the counter reaches k × N, reading narrow-view waveform data from a memory; k is a positive integer, and N is the number of trigger signals required by a waveform point voltage value output by the digital-to-analog converter;
the digital-to-analog converter converts the read narrow-view waveform data into a waveform point voltage value and outputs the waveform point voltage value to the display panel.
7. The adaptive adjustment method for narrow viewing angle waveform of LCD device of claim 6, wherein the frequency f1 of said trigger waveform follows the frequency f2 of the frame start signal STV, and said trigger waveform has M trigger signals in one period of the frame start signal STV, wherein M ≧ the minimum waveform point number required for narrow viewing angle;
the minimum time T1 of the waveform point voltage value output by the digital-to-analog converter is less than T2, wherein T2 is the minimum value of the time T of adjacent trigger signals.
8. The adaptive adjustment method for waveform of narrow viewing angle of LCD device as claimed in claim 7, wherein the number of bits of said DAC is determined according to N, M and the number of waveform points required for narrow viewing angle.
9. The adaptive adjustment method for narrow viewing angle waveform of liquid crystal display device according to any one of claims 6 to 8, characterized in that the method further comprises the steps of:
judging whether the narrow visual angle waveform data in the memory is read completely;
and if the reading is not finished, controlling the counter to continue counting.
10. The adaptive narrow-view-angle waveform adjusting method of an LCD device according to any of claims 6-8, wherein the trigger signal is a rising-edge trigger signal.
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| KR102031580B1 (en) * | 2013-05-10 | 2019-11-08 | 엘지디스플레이 주식회사 | Display apparatus and display apparatus control method |
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| CN102237061A (en) * | 2010-11-16 | 2011-11-09 | 华映视讯（吴江）有限公司 | Angle cutting system of display and timing sequence angle cutting control method thereof |
| CN104464654A (en) * | 2013-09-23 | 2015-03-25 | 瑞鼎科技股份有限公司 | Panel driving circuit and automatic synchronization method of ring-shaped oscillation frequency thereof |
| CN105589235A (en) * | 2016-03-11 | 2016-05-18 | 深圳市华星光电技术有限公司 | Liquid crystal display panel driving method |
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