CN104810000A - Control circuit and control method used for liquid crystal display - Google Patents
Control circuit and control method used for liquid crystal display Download PDFInfo
- Publication number
- CN104810000A CN104810000A CN201510245208.4A CN201510245208A CN104810000A CN 104810000 A CN104810000 A CN 104810000A CN 201510245208 A CN201510245208 A CN 201510245208A CN 104810000 A CN104810000 A CN 104810000A
- Authority
- CN
- China
- Prior art keywords
- control unit
- running parameter
- main control
- bus
- liquid crystal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention discloses a control circuit and a control method used for liquid crystal display. The control circuit comprises a main control unit and a time sequence control unit, wherein the time sequence control unit is connected with the main control unit; a working parameter setting module used for providing working parameters to the time sequence control unit is integrated in the main control unit. According to the control circuit, the working parameters are sent to the time sequence control unit via the main control unit in the control circuit used for the liquid crystal display, and EEPROM (electrically erasable programmable read-only memory) used for storing the working parameters does not need to be additionally arranged on the periphery of the time sequence control unit so as to simplify the design of the control circuit used for the liquid crystal display and lower production cost.
Description
Technical field
The present invention relates to technical field of liquid crystal display, specifically, relate to a kind of control circuit for liquid crystal display and control method.
Background technology
At present, TCON (timing controller is provided with in liquid crystal display control circuit, time schedule controller), LVDS (the Low-Voltage Differential Signaling that system board provides by this time schedule controller, low-voltage differential signal) be converted into Mini-LDVS (Mini-Low-Voltage Differential Signaling, mini low-voltage differential signal) and export afterwards.
Wherein, by the EEPROM being arranged at its outside, ((Electrically ErasableProgrammable Read-Only Memory, EEPROM (Electrically Erasable Programmable Read Only Memo)) provides running parameter to this time schedule controller needs.In this case, need to set up EEPROM in the periphery of TCON, this just must increase the production cost of liquid crystal display control circuit.
Summary of the invention
For overcoming the above problems, the invention provides a kind of control circuit for liquid crystal display and control method, to reduce the production cost of liquid crystal display control circuit.
According to an aspect of the present invention, provide a kind of control circuit for liquid crystal display, comprising:
Main control unit;
Timing control unit, it is connected with described main control unit;
Wherein, be integrated with in described main control unit inside the running parameter setting module that running parameter is provided to described timing control unit.
According to one embodiment of present invention, described running parameter setting module passes through I
2c bus provides described running parameter to described timing control unit.
According to one embodiment of present invention, the transmit port that described running parameter setting module comprises register and is connected with described register, wherein, described running parameter setting module stores described running parameter by described register and by described transmit port, described running parameter is sent to described I
2in C bus.
According to one embodiment of present invention, described timing control unit comprises receiving port, and described receiving port is by described I
2c bus receives the running parameter that described main control unit sends.
According to one embodiment of present invention, described timing control unit also comprises I
2c control module, described I
2c control module is connected to control described receiving port and receives the running parameter that described main control unit sends with described receiving port.
According to another aspect of the present invention, additionally provide a kind of control method for liquid crystal display, comprising:
Receive view data to carry out pre-service, and start transmission running parameter when receiving view data;
Receive described running parameter, and based on described running parameter, pretreated view data is processed, in order to produce required control signal.
According to one embodiment of present invention, I is passed through
2c bus sends described running parameter.
According to one embodiment of present invention, store described running parameter by register and by transmit port, described running parameter be sent to described I
2in C bus.
According to one embodiment of present invention, by receiving port receive described transmit port send and through described I
2the running parameter of C bus transfer.
According to one embodiment of present invention, I is passed through
2c control module controls the running parameter that described receiving port receives the transmission of described main control unit.Beneficial effect of the present invention:
The present invention sends running parameter by the main control unit in liquid crystal display control circuit to timing control unit, avoid the EEPROM setting up store operational parameters in timing control unit periphery, thus simplify liquid crystal display control circuit design, reduce production cost.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, do simple introduction by accompanying drawing required in embodiment or description of the prior art below:
Fig. 1 is for controlling the electrical block diagram of liquid crystal display in prior art;
Fig. 2 is the electrical block diagram for controlling liquid crystal display according to an embodiment of the invention; And
Fig. 3 is the method flow diagram for controlling liquid crystal display according to an embodiment of the invention.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical matters whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
Be illustrated in figure 1 a kind of electrical block diagram for controlling liquid crystal display adopted in prior art.As shown in fig. 1, this circuit comprises system board and time schedule controller.Wherein, the LVDS signal that time schedule controller receiving system plate exports, and export to corresponding driving circuit after LVDS signal being converted into Mini-LVDS signal based on the temporal reference that outside EEPROM provides, in order to control the image display of display panels.But this circuit structure needs to set up EEPROM in the periphery of time schedule controller, inside arranges I
2c controller realizes communicating of time schedule controller and EEPROM, and this design is unfavorable for simplifying circuit design, and the integrated level of product is low.
Therefore, the invention provides a kind of circuit design simplified, in order to improve the integrated level of liquid crystal control circuit.Be illustrated in figure 2 the structural representation of liquid crystal display control circuit according to an embodiment of the invention, below with reference to Fig. 2, the present invention is described in detail.
As shown in Figure 2, this liquid crystal display control circuit timing control unit of comprising main control unit and being connected with this main control unit.Wherein, be integrated with running parameter setting module in this main control unit inside, this running parameter setting module is used for providing to timing control unit running parameters such as comprising the deration of signal, signal period or look-up table.Simultaneously, the operational module view data of reception being converted into LVDS signal is also provided with in this main control unit inside, it is the operational module of Mini-LVDS signal that timing control unit inside is also provided with LVDS signal transacting, but these and summary of the invention of the present invention have nothing to do, and belong to prior art, do not add detailed description herein.
In the present invention, running parameter setting module is integrated in main control unit, controls running parameter setting module by main control unit and send running parameter to timing control unit, to ensure that timing control unit normally works.This setup can be avoided being arranged on timing control unit outer setting EEPROM, thus can simplify circuit design, reduces production cost.
In one embodiment of the invention, running parameter setting module passes through I
2c (Inter-IntegratedCircuit, built-in integrated circuit) bus provides running parameter to timing control unit.In the present invention, running parameter setting module is by ad hoc I
2c bus provides running parameter to timing control unit.I
2c bus is twin wire universal serial bus, for connection control chip and peripherals thereof, is a kind of bus standard that microelectronics Control on Communication field extensively adopts.I
2c bus only requires two bus lines: a serial data line, a serial time clock line.Each device being connected to bus can be software set address by unique address and the simple main frame existed/from office always, realizes main frame/from the data transmission between machine.I
2c bus is a kind of special shape of synchronous communication, has interface line few, and control mode is simple, and device package form is little, and traffic rate is advantages of higher comparatively, so, adopt I in the present invention
2c bus realizes main control unit and sends running parameter to timing control unit.
In one embodiment of the invention, the running parameter setting module transmit port that comprises register and be connected with this register.Wherein, running parameter is sent to I by transmit port by register store operational parameters by running parameter setting module
2in C bus.In the present invention, running parameter setting module is used for providing running parameter to timing control unit, timing control unit produces benchmark sequential based on this running parameter, and process based on the LVDS signal that ordered pair main control unit during this benchmark exports, finally produce the control signal for driving display panels.Herein, running parameter comprises the deration of signal, signal period or question blank etc., and timing control unit processes to export corresponding control signal to the LVDS signal that main control unit exports based on these parameters.
In the present invention, the register in running parameter setting module is for storing running parameter required when timing control unit works, and this running parameter can carry out arranging and changing according to concrete liquid crystal display mode.In existing controller chip, be generally all integrated with register or internal storage, the register in existing control chip or the running parameter of internal storage storage needed for timing control unit can be utilized.When adopting such controller chip to make the main control unit in the present invention, the running parameter of timing control unit just can be provided by this main control unit, and need not set up in timing control unit outside the running parameter that an EEPROM stores timing control unit specially.Like this, just can simplify the design of liquid crystal display control circuit, save the production cost adopting EEPROM.Meanwhile, such design also can make full use of the controller chip making main control unit, and can not increase the volume of main control unit, improves the integrated level of liquid crystal control circuit.
In the present invention, the running parameter needed for timing control unit that the transmit port in running parameter setting module is used for register to store is sent to I
2c bus, via I
2c bus arrives timing control unit.In existing controller chip, what have is built-in with I
2c bus, user only needs the register setting controller chip inside relevant just can use it neatly.If but controller chip not built in hardware I
2c bus, in use, can simulate with I/O port common on controller chip.Therefore, when adopting control chip to make main control unit, can realize completely providing running parameter to timing control unit.
In one embodiment of the invention, timing control unit comprises receiving port, and this receiving port passes through I
2c bus is connected with the transmit port on main control unit, for receiving the running parameter that main control unit sends.
In one embodiment of the invention, this timing control unit also comprises I
2c control module, this I
2c control module is connected with receiving port, receives the running parameter of main control unit transmission in order to control receiving port.During work, main control unit sends to detect and checks I
2whether C bus is in idle condition, this I
2when C bus is in idle condition, send request signal.I
2c control module after the running parameter receiving main control unit sends request, auto answer.Main control unit receives I
2the data can carrying out first character joint after the answer signal of C control module send.I
2c control module returns an answer signal after receiving data, main control unit carries out next byte data after receiving this answer signal send, by that analogy, until after main control unit sends total data, to I
2c control module sends stop signal, stops this communicating, release bus.
According to another aspect of the present invention, a kind of control method for liquid crystal display is additionally provided.If Fig. 3 is method flow diagram according to an embodiment of the invention, below with reference to Fig. 3, this method is described in detail.
First, in step s 110, receive view data to carry out pre-service, and start transmission running parameter when receiving view data.In this step, for ensureing that the view data received reliably shows in time, when main control unit receives view data, namely start the running parameter setting module arranged thereon and send running parameter to timing control unit, main control unit carries out pre-service to the view data received simultaneously.Wherein, view data comprises display panels and carries out RGB data needed for image display, horizontal-drive signal, vertical synchronizing signal, data transfer clock and allow the signals such as data transmission.Running parameter comprises the deration of signal needed for timing control unit work, signal period and required look-up table etc.Main control unit carries out pre-service to the view data received and carries out RGB data needed for image display, horizontal-drive signal, vertical synchronizing signal, data transfer clock by display panels and allow the signals such as data transmission to be converted into LVDS signal.
Next, in the step s 120, receive running parameter, and based on this running parameter, pretreated view data is processed, in order to produce required control signal.In this step, timing control unit receives the running parameter that main control unit sends, and based on this running parameter, based on horizontal-drive signal, vertical synchronizing signal, data transfer clock and permission data transfer signal that main control unit sends, produce the various control signals driven needed for display panels.Control signal herein comprises the horizontal-drive signal, field drive singal and the RGB display that drive needed for display panels.In this process, the time course of viewdata signal, put in order and all carried out layout again, change the time sequencing relation of original pixel signal completely.Further, by changing the running parameter stored in main control unit, the display mode that can realize display panels changes.
In one embodiment of the invention, I is passed through
2c bus sends running parameter, and main control unit passes through I
2c bus is connected with timing control unit, and by this bus to the running parameter needed for timing control unit transmission.
In one embodiment of the invention, by transmit port, running parameter is sent to I by register store operational parameters
2in C bus, namely store the running parameter needed for timing control unit by the register that arranges in running parameter setting module or storer etc., and by the transmit port in running parameter setting module, running parameter is sent to I
2in C bus.
In one embodiment of the invention, by receiving port receiving end/sending end mouth send and through I
2the running parameter of C bus transfer, is namely provided with and I on timing control unit
2the receiving port that C bus connects, and by running parameter that this receiving port receiving end/sending end mouth sends.
In one embodiment of the invention, I is passed through
2c control module controls the running parameter that receiving port receives main control unit transmission, is namely provided with the I be connected with receiving port at timing control unit
2c control module, I
2c control module is based on I
2c bus protocol and main control unit carry out data communication.
Although embodiment disclosed in this invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technician in any the technical field of the invention; under the prerequisite not departing from spirit and scope disclosed in this invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (10)
1., for a control circuit for liquid crystal display, comprising:
Main control unit;
Timing control unit, it is connected with described main control unit;
Wherein, be integrated with in described main control unit inside the running parameter setting module that running parameter is provided to described timing control unit.
2. control circuit according to claim 1, is characterized in that, described running parameter setting module passes through I
2c bus provides described running parameter to described timing control unit.
3. control circuit according to claim 1 and 2, it is characterized in that, the transmit port that described running parameter setting module comprises register and is connected with described register, wherein, described running parameter setting module stores described running parameter by described register and by described transmit port, described running parameter is sent to described timing control unit.
4. control circuit according to claim 3, is characterized in that, described timing control unit comprises receiving port, and described receiving port is by described I
2c bus receives the running parameter that described main control unit sends.
5. control circuit according to claim 4, is characterized in that, described timing control unit also comprises I
2c control module, described I
2c control module is connected to control described receiving port and receives the running parameter that described main control unit sends with described receiving port.
6., for a control method for liquid crystal display, comprising:
Receive view data to carry out pre-service, and start transmission running parameter when receiving view data;
Receive described running parameter, and process to produce required control signal to pretreated view data based on described running parameter.
7. control method according to claim 6, is characterized in that, passes through I
2c bus sends described running parameter.
8. the control method according to claim 6 or 7, is characterized in that, stores described running parameter and by transmit port, described running parameter is sent to described I by register
2in C bus.
9. control method according to claim 8, is characterized in that, by receiving port receive described transmit port send and through described I
2the running parameter of C bus transfer.
10. control method according to claim 9, is characterized in that, passes through I
2c control module controls the running parameter that described receiving port receives the transmission of described main control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510245208.4A CN104810000A (en) | 2015-05-14 | 2015-05-14 | Control circuit and control method used for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510245208.4A CN104810000A (en) | 2015-05-14 | 2015-05-14 | Control circuit and control method used for liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104810000A true CN104810000A (en) | 2015-07-29 |
Family
ID=53694788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510245208.4A Pending CN104810000A (en) | 2015-05-14 | 2015-05-14 | Control circuit and control method used for liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104810000A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107909975A (en) * | 2017-11-21 | 2018-04-13 | 深圳市华星光电技术有限公司 | Upgrade the method and its display control unit, display device of time schedule controller |
| CN112037725A (en) * | 2020-08-28 | 2020-12-04 | 青岛信芯微电子科技股份有限公司 | Display device and display method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201397654Y (en) * | 2009-04-28 | 2010-02-03 | 北京德为视讯科技股份有限公司 | Digital TFT LCD display control device |
| US20110080440A1 (en) * | 2003-06-09 | 2011-04-07 | Samsung Electronics Co., Ltd. | Display device apparatus, apparatus and method for driving the same |
| CN102074205A (en) * | 2009-11-19 | 2011-05-25 | 航天信息股份有限公司 | Liquid crystal display (LCD) controller and control method thereof |
| US20110157260A1 (en) * | 2009-12-30 | 2011-06-30 | Jayoung Pyun | 3d image display device |
| CN102509538A (en) * | 2011-11-17 | 2012-06-20 | 朱敦尧 | T-CON realization method based on CPLD |
| CN103077692A (en) * | 2013-02-05 | 2013-05-01 | 深圳市华星光电技术有限公司 | Drive method of LCD (Liquid Crystal Display) and LCD control circuit using method |
| CN104008686A (en) * | 2014-04-09 | 2014-08-27 | 顺德职业技术学院 | Experimental board based on MC9S08AC16 |
-
2015
- 2015-05-14 CN CN201510245208.4A patent/CN104810000A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110080440A1 (en) * | 2003-06-09 | 2011-04-07 | Samsung Electronics Co., Ltd. | Display device apparatus, apparatus and method for driving the same |
| CN201397654Y (en) * | 2009-04-28 | 2010-02-03 | 北京德为视讯科技股份有限公司 | Digital TFT LCD display control device |
| CN102074205A (en) * | 2009-11-19 | 2011-05-25 | 航天信息股份有限公司 | Liquid crystal display (LCD) controller and control method thereof |
| US20110157260A1 (en) * | 2009-12-30 | 2011-06-30 | Jayoung Pyun | 3d image display device |
| CN102509538A (en) * | 2011-11-17 | 2012-06-20 | 朱敦尧 | T-CON realization method based on CPLD |
| CN103077692A (en) * | 2013-02-05 | 2013-05-01 | 深圳市华星光电技术有限公司 | Drive method of LCD (Liquid Crystal Display) and LCD control circuit using method |
| CN104008686A (en) * | 2014-04-09 | 2014-08-27 | 顺德职业技术学院 | Experimental board based on MC9S08AC16 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107909975A (en) * | 2017-11-21 | 2018-04-13 | 深圳市华星光电技术有限公司 | Upgrade the method and its display control unit, display device of time schedule controller |
| CN107909975B (en) * | 2017-11-21 | 2021-01-26 | Tcl华星光电技术有限公司 | Method for upgrading time schedule controller, display control device and display equipment thereof |
| CN112037725A (en) * | 2020-08-28 | 2020-12-04 | 青岛信芯微电子科技股份有限公司 | Display device and display method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106200454B (en) | A kind of communication system and method for more MCU | |
| CN103105684A (en) | Test method, device, system and test equipment of liquid crystal display module | |
| CN206711574U (en) | Displaying screen controller and display screen control system | |
| CN107637035A (en) | Dispensing device, reception device, communication system, signaling method, signal acceptance method and communication means | |
| CN108292990A (en) | Communication system and communication means | |
| TW200613960A (en) | USB control circuit for saving power and the method thereof | |
| CN103747246B (en) | Based on camera image transmitting device and the transfer control method thereof of PCI-E interface | |
| CN103838700A (en) | level multiplexing control serial communication device and communication method thereof | |
| CN105047134A (en) | LED lamp panel, lamp panel module group, and LED display screen control system | |
| CN108877634A (en) | Synchronous controller, display device and control method thereof | |
| CN105045746A (en) | Interface expanding device | |
| CN105304053B (en) | Initial signal control method, chip and display panel in timing controller | |
| CN104810000A (en) | Control circuit and control method used for liquid crystal display | |
| KR20090102055A (en) | Dual displaying method, dual display apparatus for performing the dual displaying method and dual display handphone having the dual display apparatus | |
| CN102501862B (en) | Network with vehicle-mounted display screen as core | |
| CN104537999A (en) | Panel internal interface capable of being flexibly configured based on system complexity and protocol thereof | |
| CN106412379A (en) | Control method and device for realizing frequency synchronization and liquid crystal display television | |
| CN107370651A (en) | A kind of communication means between SPI slaves | |
| CN203675243U (en) | Camera image transmission device based on PCI-E port | |
| CN100464367C (en) | LCD drive and control device | |
| CN203012699U (en) | Display control device based on wire-jumper adjustment of display resolution | |
| CN212276789U (en) | Display screen signal adapting device, display screen and mainboard | |
| CN201378316Y (en) | Universal input/output interface extension circuit and mobile terminal with same | |
| CN1744068B (en) | Master apparatus and slave apparatus combined synchronous realization method | |
| CN205016216U (en) | Display screen interface converting device and intelligent wrist -watch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150729 |