CN100555401C - The control signal generation circuit of display device and production method - Google Patents
The control signal generation circuit of display device and production method Download PDFInfo
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- CN100555401C CN100555401C CNB200710126821XA CN200710126821A CN100555401C CN 100555401 C CN100555401 C CN 100555401C CN B200710126821X A CNB200710126821X A CN B200710126821XA CN 200710126821 A CN200710126821 A CN 200710126821A CN 100555401 C CN100555401 C CN 100555401C
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Abstract
The invention relates to a kind of control signal generation circuit and production method of display device, this control signal generation circuit comprises a sequential generator, signal generating method of the present invention is an input signal that is received an outside source by clock generator, produce one first control signal, and be sent to the one drive circuit of a display device, input signal also is sent to driving circuit simultaneously, drives display device with control Driver Circuit with display pixel.The control signal generation circuit of display device of the present invention can reduce hardware complexity and reduce design complexities and power consumption, and can carry out bilateral scanning smoothly.
Description
Technical field
The invention relates to a kind of display device, refer to a kind of control signal generation circuit and control method of display device especially.
Background technology
Science and technology is maked rapid progress now, can enjoy the facility of sci-tech product in order to make the common people, and the dealer is constantly developed towards the high quality of products direction.Similarly be that early stage display is cathode-ray tube (CRT) (Cathode RayTube, CRT) display, because it is bulky big with power consumption, and the radiant rays that is produced, for human body also is the doubt of a big harm, therefore now on the market display (Liquid Crystal Display is main LCD) with LCD gradually.That LCD has is compact, low radiation and advantages such as power consumption is low, also so become the existing market main flow.
See also Fig. 1, it is the calcspar of available liquid crystal display.As shown in the figure, it comprises a sequential generator 10 ', a vertical drive circuit 20 ', a horizontal drive circuit 30 ' and a viewing area 45 '.Clock generator 10 ' receives a vertical synchronizing signal Vsync, a horizontal-drive signal Hsync and a predominant frequency signal MCK, and clock generator 10 ' produces a vertical input frequency signal VST and a vertical movement frequency signal VCK by vertical synchronizing signal Vsync with predominant frequency signal MCK.In like manner, clock generator 10 ' also produces a horizontal input frequency signal HST and a horizontal displacement frequency signal HCK according to horizontal-drive signal Hsync and predominant frequency signal MCK.
Vertical drive circuit 20 ' comprises a shift register 22 ', and shift register 22 ' is to receive vertical input frequency signal VST and vertical movement frequency signal VCK, and produces a vertical signal of selecting with control viewing area 45 ' display frame.One shift register 32 ' of horizontal drive circuit 30 ' receives horizontal input frequency signal HST and horizontal displacement frequency signal HCK, produce a sampling frequency signal and be used to the image data of taking a sample, to transmit the image data taken a sample to viewing area 45 ' and show image.
Moreover clock generator 10 ' also comprises first counter 12 ' and second counter 14 '.First counter 12 ' is in order to count frequency signal number, when the number of frequency signal arrives a threshold value, promptly send a horizontal timing control signal to horizontal drive circuit 30 ', with controlling level driving circuit 30 ', for example, order about the sampled data of horizontal drive circuit 30 ' maintenance sampling image data gained, convert the shows signal of a simulation to be sent to a digital analog converter (figure does not paint) to, and export viewing area 45 ' to.Second counter 14 ' is same as above-mentioned, in order to count frequency signal number, when the number of frequency signal arrives threshold value, promptly send a vertical timing control signal to vertical drive circuit 20 ' to control vertical drive circuit 20 '.
Above-mentioned located by prior art must be provided with counter 12 ' and 14 ' and count and produce various timing control signals in clock generator 10 ', so can take the area of display panel and increase the complexity of circuit design, also can increase power consumption simultaneously.
Based on above-mentioned shortcoming, No. 535136 patent of invention of TaiWan, China patent announcement proposes the another kind of mode that produces timing control signal.As shown in Figure 2, clock generator 10 ' can return a time series data (Timing data) to clock generator 10 ' by vertical drive circuit 20 ' and horizontal drive circuit 30 ' original shift register 22 ' with shift register 32 ' respectively, and clock generator 10 ' produces timing control signal and is sent to vertical driver 20 ' and horizontal driver 30 ' according to time series data, with control vertical driver 20 ' and horizontal driver 30 '.
Produce timing control signal by the way, though do not need usage counter, but when carrying out bilateral scanning, because many timing control signals must produce during blank (blanking), if calculate with typical 10% blank cycle, resolution for output is the display of 240 * 320 pixel resolutions, and just need produce timing control signal at each about 28 grades of illusory (dummy) shift register of adding end to end of the shift register 32 ' of horizontal drive circuit 30 ' to produce clock generator 10 ' the required time series data.The shift register 22 ' of vertical drive circuit 20 ' also is like this.
It is many that this kind mode will make shift register 22 ', 32 ' the shared length of vertical drive circuit 20 ' and horizontal drive circuit 30 ' increase, and makes to exceed display panel length up and down, and increase power consumption.For the width size requirements increasingly stringent of display panel frame-saw up and down, so design does not meet requirement now now.Moreover, can will the signal transmission be postponed as if other ground that 28 grades of illusory shift registers are arranged at display panel respectively are convenient, so easy generation problem, and can't carry out bilateral scanning smoothly, cause two-way switching difficulty.
Therefore, the control signal generation circuit and the production method that need a kind of display device at present, it can improve progression long, the complexity that increases design and the shortcoming that increases power consumption of vertical drive circuit and the original shift register of horizontal drive circuit, when avoiding bilateral scanning simultaneously, cause the disappearance of two-way switching difficulty.
Summary of the invention
The object of the present invention is to provide a kind of control signal generation circuit and production method of display device, it can directly utilize input signal as vertical timing control signal or horizontal timing control signal, to control vertical drive circuit or horizontal drive circuit respectively, so can avoid the progression of vertical drive circuit and the original shift register of horizontal drive circuit long, and increase the complexity that designs, and can carry out bilateral scanning smoothly.
Another object of the present invention is to provide a kind of control signal generation circuit and production method of display device, it directly utilizes input signal as vertical timing control signal or horizontal timing control signal, to reach the purpose that reduces consumed power.
The control signal generation circuit of display device of the present invention comprises a sequential generator, receive an input signal, described input signal comprises horizontal-drive signal and vertical synchronizing signal, described clock generator is sent to horizontal drive circuit in the described driving circuit with described horizontal-drive signal, and horizontal input frequency signal that produces by this horizontal-drive signal, according to this horizontal-drive signal and the described horizontal drive circuit of the common control of horizontal displacement frequency signal that produces according to a predominant frequency signal; Described clock generator is sent to vertical drive circuit in the described driving circuit with described vertical synchronizing signal, and vertical input frequency signal that produces by this vertical synchronizing signal, according to this vertical synchronizing signal and the described vertical drive circuit of the common control of vertical movement frequency signal that produces according to the predominant frequency signal.
The control signal generation circuit of display device of the present invention comprises a sequential generator, receive an input signal, described input signal comprises horizontal-drive signal and vertical synchronizing signal, produce horizontal input frequency signal and vertical input frequency signal respectively according to described horizontal-drive signal and vertical synchronizing signal, produce horizontal displacement frequency signal and vertical movement frequency signal respectively according to the predominant frequency signal simultaneously; One control module receives the input signal that comprises horizontal-drive signal and vertical synchronizing signal, produces second control signal, is sent to horizontal drive circuit and vertical drive circuit respectively; Wherein, by the described horizontal drive circuit of the common control of described second control signal that is sent to horizontal drive circuit, described horizontal input frequency signal and described horizontal displacement frequency signal; By the described vertical drive circuit of the common control of described second control signal that is sent to vertical drive circuit, described vertical input frequency signal and described vertical movement frequency signal.
The control signal production method of display device of the present invention comprises the following step: an input signal that receives an outside source, described input signal comprises horizontal-drive signal and vertical synchronizing signal, described horizontal-drive signal is sent to horizontal drive circuit in the described driving circuit, and horizontal input frequency signal that produces by this horizontal-drive signal, according to this horizontal-drive signal and the described horizontal drive circuit of the common control of horizontal displacement frequency signal that produces according to a predominant frequency signal; Described vertical synchronizing signal is sent to vertical drive circuit in the described driving circuit, and vertical input frequency signal that produces by this vertical synchronizing signal, according to this vertical synchronizing signal and the described vertical drive circuit of the common control of vertical movement frequency signal that produces according to the predominant frequency signal.
The control signal production method of display device of the present invention comprises the following step: receive the input signal that comprises horizontal-drive signal and vertical synchronizing signal, produce horizontal input frequency signal and vertical input frequency signal respectively according to described horizontal-drive signal and vertical synchronizing signal, produce horizontal displacement frequency signal and vertical movement frequency signal respectively according to the predominant frequency signal simultaneously; Produce second control signal according to above-mentioned input signal, be sent to horizontal drive circuit and vertical drive circuit respectively; By the described horizontal drive circuit of the common control of described second control signal that is sent to horizontal drive circuit, described horizontal input frequency signal and described horizontal displacement frequency signal; By the described vertical drive circuit of the common control of described second control signal that is sent to vertical drive circuit, described vertical input frequency signal and described vertical movement frequency signal.
The control signal generation circuit of display device of the present invention can reduce hardware complexity and reduce design complexities and power consumption, and can carry out bilateral scanning smoothly.
Description of drawings
Fig. 1 is the calcspar of available liquid crystal display.
Fig. 2 is the calcspar of another available liquid crystal display.
Fig. 3 is the calcspar of a preferred embodiment of the present invention.
Fig. 4 is the calcspar of another preferred embodiment of the present invention.
Fig. 5 A is the calcspar of a preferred embodiment of clock generator of the present invention.
Fig. 5 B be Fig. 5 A input signal and the time control signal sequential chart.
Fig. 6 A is the calcspar of another preferred embodiment of clock generator of the present invention.
Fig. 6 B be Fig. 6 A input signal and the time control signal sequential chart.
Drawing reference numeral:
10 ' clock generator, 12 ' first counter
14 ' second counter, 20 ' vertical drive circuit
22 ' shift register, 30 ' horizontal drive circuit
32 ' shift register, 45 ' viewing area
10 clock generators, 20 horizontal drive circuits
22 shift registers, 24 breech lock modules
240 sampling latch circuits 242 keep latch circuit
26 digital analog converters, 30 vertical drive circuits
32 shift LDs, 40 viewing areas
50 control modules, 500 delay cells
502 phase inverters 504 and door
Embodiment
Now further understand and understanding for your juror is had architectural feature of the present invention and the effect reached, sincerely help with preferred embodiment and cooperate detailed explanation, illustrate as after:
See also Fig. 3, it is the calcspar of a preferred embodiment of the present invention.As shown in the figure, display device of the present invention comprises a sequential generator 10, one horizontal drive circuits 20, a vertical drive circuit 30 and a viewing area 40.Clock generator 10, horizontal drive circuit 20, vertical drive circuit 30 and viewing area 40 all are positioned at a display panel (figure does not paint) of display device, and display panel is glass substrate.Horizontal drive circuit 20 all is coupled to viewing area 40 with vertical drive circuit 30.
One input signal of the outside source that the external system (for example computer system) that receives clock generator 10 is transmitted, produce one first control signal and be sent to one drive circuit, input signal also is sent to driving circuit simultaneously, with control Driver Circuit, wherein driving circuit is used to control the display device display pixel, and this driving circuit comprises a horizontal drive circuit 20 and a vertical drive circuit 30.The input signal that clock generator 10 is received can be a horizontal-drive signal Hsync and a vertical synchronizing signal Vsync of outside source, and produce the vertical input frequency signal VST of a horizontal input frequency signal HST respectively with one, and be sent to horizontal drive circuit 20 and vertical drive circuit 30 respectively, in addition, clock generator 10 also produces a horizontal displacement frequency signal HCK and a vertical movement frequency signal VCK respectively according to a predominant frequency signal MCK of the outside source that external system transmitted.In above-mentioned, first control signal comprises a horizontal control signal and a vertical control signal, with difference controlling level driving circuit 20 and vertical drive circuit 30, horizontal control signal comprises horizontal input frequency signal HST and horizontal displacement frequency signal HCK, and vertical control signal comprises vertical input frequency signal VST and vertical movement frequency signal VCK.
The present invention is owing to directly produce timing control signal according to input signal, so do not need as located by prior art, to utilize counter, the perhaps shift register 22,32 of horizontal drive circuit 20 or vertical drive circuit 30, so can reduce hardware complexity and reduce design complexities and power consumption, can avoid the horizontal drive circuit 20 and the shift register 22,32 of vertical drive circuit 30 to cause length long in addition because of increasing progression, and increase the complexity that designs, and can carry out bilateral scanning smoothly.
See also Fig. 4, it is another preferred embodiment of the present invention, and as shown in the figure, the embodiment difference of present embodiment and Fig. 3 is that display device of the present invention also comprises a control module 50.Control module 50 receiving inputted signals, produce one second control signal and be sent to horizontal drive circuit 20 and vertical drive circuit 30, with difference controlling level driving circuit 20 and vertical drive circuit 30, and the frequency of second control signal is same as the frequency of input signal, but pulse width is not necessarily identical.
Because horizontal drive circuit 20 has multiple different designs mode respectively with vertical drive circuit 30, so the pulse bandwidth of the horizontal drive circuit 20 that is used to control different designs and the timing control signal of vertical drive circuit 30 and sequential difference to some extent.So control module 50 of the present invention is according to the control signal of different demands multiple design to be arranged.See also Fig. 5 A and Fig. 5 B, it is the calcspar of a preferred embodiment of control module of the present invention and the sequential chart of pairing input signal and timing control signal.As shown in the figure, control module 50 includes a delay cell 500 and a phase inverter 502, and delay cell 500 delay input signals are again via the anti-phase input signal after delayed of phase inverter 502, to produce second control signal.Shown in Fig. 5 B, the frequency of control signal is same as input signal.Control module 50 of the present invention also can only include delay cell 500 or phase inverter 502, and produces second control signal.
See also Fig. 6 A, it is the calcspar of another preferred embodiment of clock generator of the present invention and the sequential chart of pairing input signal and control signal.As shown in the figure, control module 50 comprises delay cell 500 and one and door 504, delay cell 500 delay input signals, and with 500 delays of door 504 receiving inputted signals and delay cell after input signal, to produce second control signal.So, the control signal that is produced will be shown in Fig. 6 B, and its frequency is same as input signal and the pulse bandwidth pulse bandwidth greater than input signal.Two above-mentioned embodiment only are two embodiment of the present invention, and control module 50 of the present invention is according to required timing control signal different designs to be arranged.In addition, control module 50 also can be arranged in the clock generator 10.
In sum, the control signal generation circuit of display device of the present invention comprises clock generator, production method of the present invention is by the clock generator receiving inputted signal, and produce first control signal according to input signal, and being sent to the driving circuit of display device, input signal also is sent to driving circuit simultaneously, with control Driver Circuit, so can reduce hardware complexity and reduce design complexities and power consumption, and can carry out bilateral scanning smoothly.
The above is preferred embodiment of the present invention only, is not to be used for limiting scope of the present invention, and all equalizations of doing according to the described shape of claim of the present invention, structure, feature and spirit change and modify, and all should be included in the claim of the present invention.
Claims (19)
1. the control signal generation circuit of a display device, it controls the one drive circuit of a display device, and this driving circuit is controlled described display device display pixel, it is characterized in that, and described control signal generation circuit comprises:
One sequential generator, receive an input signal, described input signal comprises horizontal-drive signal and vertical synchronizing signal, described clock generator is sent to horizontal drive circuit in the described driving circuit with described horizontal-drive signal, and horizontal input frequency signal that produces by this horizontal-drive signal, according to this horizontal-drive signal and the described horizontal drive circuit of the common control of horizontal displacement frequency signal that produces according to a predominant frequency signal;
Described clock generator is sent to vertical drive circuit in the described driving circuit with described vertical synchronizing signal, and vertical input frequency signal that produces by this vertical synchronizing signal, according to this vertical synchronizing signal and the described vertical drive circuit of the common control of vertical movement frequency signal that produces according to the predominant frequency signal.
2. control signal generation circuit as claimed in claim 1 is characterized in that described clock generator is sent to described horizontal drive circuit with described input signal, to control a breech lock module of this horizontal drive circuit.
3. control signal generation circuit as claimed in claim 2, it is characterized in that, described input signal is sent to a breech lock module of described horizontal drive circuit, and this breech lock module image data of taking a sample produces plural sampled data, and keeps described sampled data according to described input signal.
4. control signal generation circuit as claimed in claim 3 is characterized in that, described horizontal drive circuit also comprises:
One shift register, a horizontal input frequency signal and a horizontal displacement frequency signal according to described clock generator produces produce a sampling frequency signal, and described breech lock module is according to the described image data of described sampling frequency sample of signal.
5. control signal generation circuit as claimed in claim 3 is characterized in that, described breech lock module comprises:
One sampling latch circuit, the described image data of taking a sample produces described sampled data; And
One keeps latch circuit, according to described input signal, keeps the described sampled data of described sampling latch circuit.
6. control signal generation circuit as claimed in claim 3 is characterized in that, described horizontal drive circuit also comprises:
One digital analog converter, the described sampled data that conversion keeps is the shows signal of simulation, and is sent to a viewing area of described display device, with show image.
7. the control signal generation circuit of a display device, it controls the one drive circuit of a display device, and this driving circuit is controlled described display device display pixel, it is characterized in that, and described control signal generation circuit comprises:
One sequential generator, receive an input signal, described input signal comprises horizontal-drive signal and vertical synchronizing signal, produce horizontal input frequency signal and vertical input frequency signal respectively according to described horizontal-drive signal and vertical synchronizing signal, produce horizontal displacement frequency signal and vertical movement frequency signal respectively according to the predominant frequency signal simultaneously;
One control module receives the input signal that comprises horizontal-drive signal and vertical synchronizing signal, produces second control signal, is sent to horizontal drive circuit and vertical drive circuit respectively;
Wherein, by the described horizontal drive circuit of the common control of described second control signal that is sent to horizontal drive circuit, described horizontal input frequency signal and described horizontal displacement frequency signal;
By the described vertical drive circuit of the common control of described second control signal that is sent to vertical drive circuit, described vertical input frequency signal and described vertical movement frequency signal.
8. control signal generation circuit as claimed in claim 7 is characterized in that, described second control signal is identical with the frequency of described input signal.
9. control signal generation circuit as claimed in claim 7 is characterized in that, this control module comprises:
One delay cell postpones described input signal, and is sent to a phase inverter, and the anti-phase input signal after delayed of this phase inverter is to produce described second control signal.
10. control signal generation circuit as claimed in claim 7 is characterized in that, this control module comprises:
One delay cell postpones described input signal; And
One with door, receive the input signal after described input signal and the described delay units delay, to produce described second control signal and to be sent to described driving circuit, to control this driving circuit.
11. the control signal production method of a display device, it controls one drive circuit,, it is characterized in that this method comprises the following step to drive described display device display pixel:
Receive an input signal of an outside source, described input signal comprises horizontal-drive signal and vertical synchronizing signal, described horizontal-drive signal is sent to horizontal drive circuit in the described driving circuit, and horizontal input frequency signal that produces by this horizontal-drive signal, according to this horizontal-drive signal and the described horizontal drive circuit of the common control of horizontal displacement frequency signal that produces according to a predominant frequency signal;
Described vertical synchronizing signal is sent to vertical drive circuit in the described driving circuit, and vertical input frequency signal that produces by this vertical synchronizing signal, according to this vertical synchronizing signal and the described vertical drive circuit of the common control of vertical movement frequency signal that produces according to the predominant frequency signal.
12. control signal production method as claimed in claim 11 is characterized in that described input signal is sent to described driving circuit, to control the step of this driving circuit, also comprises:
Transmit described input signal to described horizontal drive circuit, to control a latch lock unit of this horizontal drive circuit.
13. control signal production method as claimed in claim 12, it is characterized in that, the described input signal of described transmission to the step of described horizontal drive circuit also comprises: this horizontal drive circuit image data of taking a sample produces plural sampled data, and keeps described sampled data according to described input signal.
14. control signal production method as claimed in claim 13 is characterized in that, described sampling one image data produces the step of plural sampled data, also comprises:
According to a horizontal input frequency signal and a horizontal displacement frequency signal, produce plural sampling frequency signal, this horizontal drive circuit produces described sampled data according to the described image data of described sampling frequency sample of signal.
15. control signal production method as claimed in claim 13 is characterized in that, this method also comprises:
The described sampled data that conversion keeps is the shows signal of simulation, and is sent to a viewing area of described display device, with show image.
16. the control signal production method of a display device, it controls one drive circuit,, it is characterized in that this method comprises the following step to drive described display device display pixel:
Reception comprises the input signal of horizontal-drive signal and vertical synchronizing signal, produce horizontal input frequency signal and vertical input frequency signal respectively according to described horizontal-drive signal and vertical synchronizing signal, produce horizontal displacement frequency signal and vertical movement frequency signal respectively according to the predominant frequency signal simultaneously;
Produce second control signal according to above-mentioned input signal, be sent to horizontal drive circuit and vertical drive circuit respectively;
By the described horizontal drive circuit of the common control of described second control signal that is sent to horizontal drive circuit, described horizontal input frequency signal and described horizontal displacement frequency signal;
By the described vertical drive circuit of the common control of described second control signal that is sent to vertical drive circuit, described vertical input frequency signal and described vertical movement frequency signal.
17. control signal production method as claimed in claim 16 is characterized in that, described second control signal is identical with the frequency of described input signal.
18. control signal production method as claimed in claim 16 is characterized in that, described foundation one input signal produces the step of second control signal, also comprises:
Postpone described input signal, anti-phase input signal after delayed, and be sent to described driving circuit.
19. control signal production method as claimed in claim 16 is characterized in that, described foundation one input signal produces the step of second control signal, also comprises:
Postpone described input signal; And
Multiply each other described input signal with postpone after input signal, to produce described second control signal and to be sent to described driving circuit, to control this driving circuit.
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| CNB200710126821XA CN100555401C (en) | 2007-06-28 | 2007-06-28 | The control signal generation circuit of display device and production method |
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| CNB200710126821XA CN100555401C (en) | 2007-06-28 | 2007-06-28 | The control signal generation circuit of display device and production method |
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| CN100555401C true CN100555401C (en) | 2009-10-28 |
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| US8717274B2 (en) * | 2010-10-07 | 2014-05-06 | Au Optronics Corporation | Driving circuit and method for driving a display |
| KR102217614B1 (en) * | 2014-10-23 | 2021-02-22 | 삼성디스플레이 주식회사 | Display device and electronic device having the same |
| CN106057142B (en) * | 2016-05-26 | 2018-12-25 | 深圳市华星光电技术有限公司 | Display device and its control method |
| TWI758097B (en) * | 2021-02-18 | 2022-03-11 | 友達光電股份有限公司 | Driving circuit and related driving method |
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