CN101192399A - Double screen driving circuit - Google Patents
Double screen driving circuit Download PDFInfo
- Publication number
- CN101192399A CN101192399A CNA2006101571246A CN200610157124A CN101192399A CN 101192399 A CN101192399 A CN 101192399A CN A2006101571246 A CNA2006101571246 A CN A2006101571246A CN 200610157124 A CN200610157124 A CN 200610157124A CN 101192399 A CN101192399 A CN 101192399A
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- crystal panel
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Abstract
The invention provides a double screen drive circuit comprising a power circuit, a signal processing circuit, a strobe circuit, an active liquid crystal panel and a passive liquid crystal panel. The power circuit transforms the analog voltage and the digital voltage input from outside into various voltages needed to drive the two liquid crystal panels, and provides a working voltage to the signal processing circuit at the same time. The signal processing circuit transforms the control signals input from outside into various control signals needed to drive the two liquid crystal panels and sends the control signals to the strobe circuit, meanwhile, the signal processing circuit sends a clock signal to the strobe circuit. The strobe circuit time-sharing transmits control signals to the two liquid crystal panels.
Description
Technical field
The present invention relates to a kind of double screen driving circuit.
Background technology
Along with the continuous maturation and the innovation of lcd technology, can realize that the electronic products such as mobile phone that double screen shows also more and more are deep in people's the life.
General double screen shows needs two liquid crystal panels to realize, and each liquid crystal panel needs an integrated circuit to drive the ability display image respectively, as shown in Figure 1.This double screen driving circuit 10 comprises one first drive integrated circult 11, one second drive integrated circult, 12, one active liquid crystal panel 13 and a passive type liquid crystal panel 14, this first drive integrated circult 11 comprises one first power circuit 111, one first signal processing circuit 112, and this second drive integrated circult 12 comprises a second source circuit 121, a secondary signal treatment circuit 122.
Extraneous aanalogvoltage and digital voltage input to this first power circuit 111, the voltage of 111 pairs of inputs of this first power circuit is handled the back to these active liquid crystal panel 13 its required various operating voltage of transmission, as grid operating voltage Vgh, Vgl, common electric voltage Vcom or the like, and to first signal processing circuit, 112 transmission operating voltage Vdd.
Extraneous various control signals, input to this first signal processing circuit 112 as clock signal C lock, enable signal Enable, reset signal Reset or the like, this active liquid crystal panel 13 is handled and be sent to 112 pairs of input signals of this first signal processing circuit, and this active liquid crystal panel 13 realizes that under the effect of various operating voltage and control signal image shows.
Extraneous aanalogvoltage and digital voltage input to this second source circuit 121 simultaneously, the voltage of 121 pairs of inputs of this second source circuit is handled the back to this passive type liquid crystal panel 14 its required driving voltage Vop of transmission, and to secondary signal treatment circuit 122 transmission operating voltage Vdd.
Extraneous various control signals input to this secondary signal treatment circuit 122 simultaneously, this passive type liquid crystal panel 14 is handled and be sent to 122 pairs of input signals of this secondary signal treatment circuit, and this passive type liquid crystal panel 14 realizes that under the effect of driving voltage and control signal image shows.
But this double screen driving circuit 10 needs two integrated circuit, thereby makes the volume of double-screen product bigger.
Summary of the invention
In order to solve the bigger problem of double-screen product volume, the invention provides a kind of double screen driving circuit that can reduce the double-screen product volume.
A kind of double screen driving circuit, it comprises a power circuit, a signal processing circuit, a gating circuit, an active liquid crystal panel and a passive type liquid crystal panel.This power circuit changes the aanalogvoltage and the digital voltage of external world's input into driving two various voltages that liquid crystal panel is required, and this power circuit provides operating voltage to this signal processing circuit simultaneously.This signal processing circuit changes the control signal of external world's input the required various control signals of two liquid crystal panels of driving into and is sent to this gating circuit, and this signal processing circuit is simultaneously to this gating circuit tranmitting data register signal.This gating circuit timesharing transmits control signal corresponding to two liquid crystal panels.
Compared with prior art, double screen driving circuit of the present invention drives active liquid crystal panel and passive type liquid crystal panel with the timesharing of a slice integrated circuit, can reduce the volume of double-screen product integral body.Make the also corresponding meeting of this double-screen product and reduce manufacturing process, shorten man-hour, thereby reduce cost.
Description of drawings
Fig. 1 is a kind of circuit structure diagram of prior art double screen driving circuit.
Fig. 2 is the circuit structure diagram of double screen driving circuit of the present invention.
Fig. 3 is a kind of circuit structure diagram of gating circuit shown in Figure 2.
Embodiment
See also Fig. 2, it is the circuit structure diagram of double screen driving circuit of the present invention.This double screen driving circuit 20 comprises a power circuit 201, a signal processing circuit 202, a gating circuit 203, one active liquid crystal panel 22 and a passive type liquid crystal panel 23, wherein, this power circuit 201, signal processing circuit 202 and gating circuit 203 are integrated in a slice integrated circuit, this active liquid crystal panel 22 is the tft liquid crystal panel, and this passive type liquid crystal panel 23 is a supertwist nematic liquid crystal panel.
Extraneous aanalogvoltage and digital voltage input to this power circuit 201, the voltage of 201 pairs of inputs of this power circuit is handled the back to these active liquid crystal panel 22 its required various operating voltage of transmission, as grid operating voltage Vgh, Vgl, common electric voltage Vcom or the like, and to passive type liquid crystal panel 23 transmission driving voltage Vop; To signal processing circuit 202 transmission operating voltage Vdd.
Extraneous various control signals, input to this signal processing circuit 202 as clock signal C lock, enable signal Enable, reset signal Reset or the like, 202 pairs of input signals of this signal processing circuit are handled and are transmitted various drive signals to this gating circuit 203.This signal processing circuit 202 sends gating signal to this gating circuit 203 simultaneously, under the control of this gating signal, these gating circuit 203 timesharing transmit control signal corresponding to active liquid crystal panel 22 and passive type liquid crystal panel 23, at any one time promptly, this gating circuit 203 is only to the various drive signals of one of this active liquid crystal panel 22 and passive type liquid crystal panel 23 transmission.This active liquid crystal panel 22 realizes that under the effect of various operating voltage and drive signal image shows, this passive type liquid crystal panel 23 realizes also that under the effect of various operating voltage and drive signal image shows.
See also Fig. 3, it is a kind of circuit structure diagram of gating circuit shown in Figure 2.This gating circuit 203 comprises a first transistor 31, a transistor seconds 32, a first input end 33, one second input end 36, one first output terminal 34 and one second output terminal 35.This first transistor 31 is a N type passage EMOS enhancement metal oxide semiconductor field-effect transistor, and this transistor seconds 32 is a P type passage EMOS enhancement metal oxide semiconductor field-effect transistor.The drain electrode of the drain electrode of this first transistor 31 and this transistor seconds 32 links together as this first input end 33, the grid of the grid of this first transistor 31 and this transistor seconds 32 links together as this second input end 36, the source electrode of this first transistor 31 is as this first output terminal 34, and the source electrode of this transistor seconds 32 is as this second output terminal 35.This first, second input end 33,36 all is electrically connected with this signal processing circuit 202, and this first output terminal 34 is electrically connected with this active liquid crystal panel 22, and this second output terminal 35 is electrically connected with this passive type liquid crystal panel 23.
The gating signal of these signal processing circuit 202 outputs is imported from this second input end 36, when gating signal is high level, and these the first transistor 31 conductings, this transistor seconds 32 ends.The various drive signals of these signal processing circuit 202 outputs are sent to this active liquid crystal panel 22 from these first input end 33 inputs and by this first transistor 31.When gating signal was low level, this first transistor 31 ended, these transistor seconds 32 conductings.The various drive signals of these signal processing circuit 202 outputs are sent to this passive type liquid crystal panel 23 from first input end 33 inputs and by this transistor seconds 32.
Compared with prior art, double screen driving circuit 20 usefulness a slice integrated circuit timesharing of the present invention drive active liquid crystal panel 22 and passive type liquid crystal panel 23, can reduce the volume of double-screen product integral body.Make the also corresponding meeting of this double-screen product and reduce manufacturing process, shorten man-hour, thereby reduce cost.
Claims (5)
1. double screen driving circuit, it comprises a power circuit, one signal processing circuit, an one active liquid crystal panel and a passive type liquid crystal panel, this power circuit changes the aanalogvoltage and the digital voltage of external world's input into driving two various voltages that liquid crystal panel is required, this power circuit provides operating voltage to this signal processing circuit simultaneously, this signal processing circuit changes the control signal of external world's input into driving two various control signals that liquid crystal panel is required, it is characterized in that: this double screen driving circuit also comprises a gating circuit, and this gating circuit receives the various control signals of this signal processing circuit transmission and clock signal and timesharing and transmits control signal corresponding to two liquid crystal panels.
2. double screen driving circuit as claimed in claim 1 is characterized in that: this power circuit, signal processing circuit and gating circuit are integrated in a slice integrated circuit.
3. double screen driving circuit as claimed in claim 1 is characterized in that: this active liquid crystal panel is a thin-film transistor display panel, and this passive type liquid crystal panel is a supertwist nematic liquid crystal panel.
4. double screen driving circuit as claimed in claim 1, it is characterized in that: this gating circuit comprises a first transistor, one transistor seconds, one first input end, one second input end, one first output terminal and one second output terminal, this is first years old, the drain electrode of transistor seconds links together as this first input end, this is first years old, the grid of transistor seconds links together as this second input end, the source electrode of this first transistor is as this first output terminal, the source electrode of this transistor seconds is as this second output terminal, this is first years old, second input end all is electrically connected with this signal processing circuit, this first output terminal is electrically connected with this active liquid crystal panel, and this second output terminal is electrically connected with this passive type liquid crystal panel.
5. double screen driving circuit as claimed in claim 4 is characterized in that: this first transistor is a N type passage EMOS enhancement metal oxide semiconductor field-effect transistor, and this transistor seconds is a P type passage EMOS enhancement metal oxide semiconductor field-effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101571246A CN101192399A (en) | 2006-11-29 | 2006-11-29 | Double screen driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101571246A CN101192399A (en) | 2006-11-29 | 2006-11-29 | Double screen driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101192399A true CN101192399A (en) | 2008-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101571246A Pending CN101192399A (en) | 2006-11-29 | 2006-11-29 | Double screen driving circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN101192399A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105931610A (en) * | 2016-07-11 | 2016-09-07 | 深圳市华星光电技术有限公司 | Double-sided display screen driving circuit and double-sided display device |
| CN105976780A (en) * | 2016-07-11 | 2016-09-28 | 深圳市华星光电技术有限公司 | Panel driving circuit and display apparatus |
| CN108492796A (en) * | 2018-03-30 | 2018-09-04 | 京东方科技集团股份有限公司 | A kind of switching control and display equipment |
| WO2019042057A1 (en) * | 2017-08-31 | 2019-03-07 | 西安诺瓦电子科技有限公司 | Display control system and display screen controller |
| CN111431379A (en) * | 2020-04-20 | 2020-07-17 | Oppo广东移动通信有限公司 | Power circuits and electronics |
| CN111491162A (en) * | 2020-05-19 | 2020-08-04 | 京东方科技集团股份有限公司 | Detection driving circuit, driving method and detection device |
-
2006
- 2006-11-29 CN CNA2006101571246A patent/CN101192399A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105931610A (en) * | 2016-07-11 | 2016-09-07 | 深圳市华星光电技术有限公司 | Double-sided display screen driving circuit and double-sided display device |
| CN105976780A (en) * | 2016-07-11 | 2016-09-28 | 深圳市华星光电技术有限公司 | Panel driving circuit and display apparatus |
| WO2019042057A1 (en) * | 2017-08-31 | 2019-03-07 | 西安诺瓦电子科技有限公司 | Display control system and display screen controller |
| CN108492796A (en) * | 2018-03-30 | 2018-09-04 | 京东方科技集团股份有限公司 | A kind of switching control and display equipment |
| WO2019184755A1 (en) * | 2018-03-30 | 2019-10-03 | 京东方科技集团股份有限公司 | Switching control device and control method thereof, and display device |
| US11157227B2 (en) | 2018-03-30 | 2021-10-26 | Ordos Yuansheng Optoelectronics Co., Ltd. | Switching control device and control method thereof, and display device |
| CN111431379A (en) * | 2020-04-20 | 2020-07-17 | Oppo广东移动通信有限公司 | Power circuits and electronics |
| CN111431379B (en) * | 2020-04-20 | 2021-04-23 | Oppo广东移动通信有限公司 | Power circuits and electronics |
| CN111491162A (en) * | 2020-05-19 | 2020-08-04 | 京东方科技集团股份有限公司 | Detection driving circuit, driving method and detection device |
| CN111491162B (en) * | 2020-05-19 | 2021-08-13 | 京东方科技集团股份有限公司 | Detection driving circuit, driving method and detection device |
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Open date: 20080604 |