CN1324552C - Method and device for enhancing multi-functional selection with liquid crystal displaying driver - Google Patents

Method and device for enhancing multi-functional selection with liquid crystal displaying driver Download PDF

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Publication number
CN1324552C
CN1324552C CNB971120978A CN97112097A CN1324552C CN 1324552 C CN1324552 C CN 1324552C CN B971120978 A CNB971120978 A CN B971120978A CN 97112097 A CN97112097 A CN 97112097A CN 1324552 C CN1324552 C CN 1324552C
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China
Prior art keywords
data
signal
controlled system
time controlled
frequency
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Expired - Lifetime
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CNB971120978A
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Chinese (zh)
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CN1200528A (en
Inventor
刘钦州
郭宏达
宣以伟
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Holtek Semiconductor Inc
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Holtek Semiconductor Inc
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Priority to HK97101809A priority patent/HK1002161A2/en
Publication of CN1200528A publication Critical patent/CN1200528A/en
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Abstract

The present invention relates to a method and a device for enhancing the multifunctional selection of a liquid crystal display driver. In the present invention, data in an RAM can be mapped to a panel mainly in a command mode and is suitable for liquid crystal display slices with various electrical levels, and the functions of a testing base terminal, a buzzer, an interruption request terminal, etc. can be utilized by the present invention with the utilization of a time control system device and in the command mode; thereby, alternate switching operation can be carried out, and the multifunctional selection can be strengthened.

Description

Method and device that the LCD driver enhancing multi-functional is selected
Technical field
The present invention relates to method and device that a kind of LCD driver enhancing multi-functional is selected, especially refer to a kind of command mode control that utilizes, method and device that the structure of energy operate time control system is selected with a kind of LCD driver enhancing multi-functional that reaches the effects that can select a bit doughtily.
Background technology
Traditional LCD driver, see also shown in Figure 1, block schematic diagram for traditional LCD driver device, at first will import the numerical digit 110 of data by extraneous (being the user), select control signal 111 timely serial veins to dash the shift registor 10 that 112 grades are input to microcontroller synchronously, and the shift registor 10 of microcontroller, with its bits of data of depositing, move in the driver with serial mode, be sent to driver one Loading Control signal 113 by microcontroller again, with the long numeric data breech lock 11 in the driver, carry the level shifter 12 of latch data again to driving circuit, and display frequency input signal 114 control level shift units 12, provide fixed-bias transistor circuit 116 and enable signal 115 to level driving circuit mouth by the external world, deliver to display panels 14 and go to show these data thereby this level driving circuit drives data.
See also shown in Figure 2, workflow diagram for traditional LCD driver, at first start shift registor in step 21, then by the interface a of microcontroller and driver, input to the driver long numeric data in step 22 by microcontroller, again in step 23, by the Loading Control signal with this data latching, and in step 24, these data and display frequency are controlled in level shifter, in step 25, cooperate the external world bias voltage to be provided and to enable the driving circuit driving data to panel, step 26, panel can show these data this moment, finishes up to step 27 lump-sum data presentation.
By above-mentioned traditional LCD driver, learn that it has following shortcoming:
1. certain lump-sum data, contain bits of data, it is shift registor (Shift register) with serial mode input microcontroller, yet when any data wherein contained any wherein when a numerical digit makes a mistake, then the lump-sum data must be re-entered shift registor (Shift register), and these programs are quite loaded down with trivial details time-consuming.
2. when drive read is fetched data, the serial lump-sum data serial that must will contain multidigit is moved to driver one by one by shift registor again, and these unidirectional data that input to driver can't be made the two-way chance of leading, thereby the working storage to microcontroller of data can not being read back is with the misdata correction.
3. find wrong data cases when display panels is accepted data, can't immediately certain one point data be revised, but must total data upgrade again.
4. the structure that has only input owing to data terminal in installing, thus micro controller function simply can't be brought into play high-level efficiency and multi-functional control function.
Comprehensive the above, demonstrate traditional LCD driver, do not met modern actual demand and remain to be improved.
So the inventor concentrates on studies at above-mentioned shortcoming and cooperates theoretical utilization and propose method and the device that LCD driver enhancing multi-functional that a kind of design concept rationally and effectively improves above-mentioned shortcoming is selected.
Summary of the invention
Fundamental purpose of the present invention, provide a kind of method and device with multi-functional selection, this method and apparatus is under the operation of command mode, can be with the random access memory mapping (enum) data to driving circuit, relend and help circuit that data are driven to deliver to panel and show, control system can be made read mode with random access memory, writes pattern and read the modified function that writes data double-way switching such as pattern again in back simultaneously.
To achieve these goals, the invention provides the method that a kind of LCD driver enhancing multi-functional is selected, be characterized in, by time controlled system transmission decoded signal or command code, accept decoded signal and the command code that time controlled system transmits by instruction decoder, and this command code is decoded as normal mode and test pattern, random access memory is accepted the decoded data that instruction decoder transmits, described LCD driver is accepted the display frequency and the random access memory institute mapped data of time controlled system, makes LCD driver have the selection video data, buzzing, each action of interrupt request signal or test.
The device that the present invention also provides a kind of LCD driver enhancing multi-functional to select is made up of time controlled system and liquid crystal display drive circuit, and wherein, the device that this LCD driver enhancing multi-functional is selected also comprises:
Instruction decoder is accepted decoded signal and command code that time controlled system transmits, and this command code is decoded as normal mode and test pattern;
Random access memory can be accepted the decoded data that instruction decoder transmits;
Described liquid crystal display drive circuit is accepted the display frequency and the random access memory institute mapped data of time controlled system, so that data export display panels to.
The device that aforesaid LCD driver enhancing multi-functional is selected, wherein, this time controlled system comprises:
Built-in oscillator produces oscillation frequency signal voluntarily;
External oscillator is by outside input oscillation frequency signal;
Multiplex's switch is electrically connected to this built-in oscillator and this external oscillator, the signal of can choosing any one kind of them;
Frequency divider is electrically connected the frequency that this multiplex's switch provides control able to programme;
Hummer provides the frequency signal of control able to programme by this frequency divider, makes it produce buzzing;
The interrupt request system provides the frequency signal of control able to programme by this frequency divider, through timer or supervision timer overflow, makes it produce interrupt request signal;
The input signal system accepts to read the numerical digit signal, writes the numerical digit signal, selects numerical digit signal and data.
The invention has the beneficial effects as follows that the structure of operate time control system by the operation of command mode, has to efficiency operation stepss such as test, buzzing or the interruption of selection.
Simultaneously, the present invention is when this system halt, and then oscillator decommissions, and to carry out sleep state, can reach the effect of power saving.
For to purpose of the present invention, feature and effect, have and further understand and approval, existing conjunction with figs. describe in detail as after.
Description of drawings
Fig. 1 is traditional LCD driver device block schematic diagram;
Fig. 2 is the workflow diagram of traditional LCD driver;
Fig. 3 is the calcspar of enhancing multi-functional selecting arrangement of the LCD driver of the embodiment of the invention;
Fig. 4 is the time controlled system block schematic diagram of the embodiment of the invention;
Fig. 5 is the action flow chart that the enhancing multi-functional of the LCD driver of the embodiment of the invention is selected;
Label declaration:
1 input system, 2 control system
Transmission ends 10 shift registors of 3 external oscillators
11 breech lock long numeric datas, 12 level shifters
13 level driving circuits, 14 display panels
110 data numerical digits 111 are selected control signal
112 time sequential pulses, 113 Loading Control signals
114 display frequency signals, 115 enable signals
116 fixed-bias transistor circuits 21 start shift registor
22 input long numeric datas, 23 breech lock long numeric datas
24 level shifters, 25 driving data are to panel
26 drive panel video data 27 lump-sum data presentation finishes
31 time controlled systems, 32 instruction decoders
33 random access memory, 34 liquid crystal display drive circuits
35 display panels, 411 built-in oscillators
412 quartz (controlled) oscillators or external oscillator 413 multiplex's switchs
414 built-in frequency dividers 425 and door
The frequency signal of 426 buzzing input ends, 417 controls able to programme
415 enablers, 416 buzzing output terminals
419 timers, 420 supervision timers
422 or door 424 interrupt request signals output
51 start power supply 52 control signals and data input
53 time controlled system transmission signals or data 54 incoming frequencies
55 produce frequency signal 531 decodes commands voluntarily
Whether 532 decode is finished 533 normal modes
534 write random access memory
535 frequency dividers provide the frequency signal of control able to programme
536 data map
537 receive the bias voltage and the elasticity cycle data of control able to programme
538 panels show its data 541 buzzers
542 timers or supervision timer overflow 543 interrupt request signals produce
550 read the modified pattern that writes again in back operates
551 outputs are by the data of random access memory
552 test patterns
553 frequency dividers stop controlled frequency signal able to programme
The output of 554 buzzing end input frequency signals, 555 display frequencies
The segmentation viewing area of 556 test fluid LCD panels and copolar point part
557 end-of-jobs
560 read modes operation 561 writes the pattern operation
The interface of a microcontroller and driver
Embodiment
See also Fig. 3, circuit block diagram for the embodiment of the invention, generally speaking it is a kind of block schematic diagram of LCD driver enhancing multi-functional selecting arrangement, the input end of the time controlled system 31 of this multi-functional selecting arrangement has the numerical digit of reading end, writes the numerical digit end, selects numerical digit end and data transmission terminal, arrange in pairs or groups the again required a pair of transmission ends of oscillatory system of this time controlled system inside, constitute one group of input system 1, shown in dotted line.This time controlled system 31 receives and to read numerical digit, writes numerical digit, selects numerical digit, and signal such as frequency, and data also are loaded into this time controlled system simultaneously.And time controlled system 31 has multiple output pathway, wherein be to export command code (COMMAND CODE) and decoded signal to instruction decoder 32 synchronously to decode, the decoded data of gained is normal mode and test mode command signal, wherein the normal mode data are write random access memory ram, label 33, make it under normal mode control, utilize 33 pairs of liquid crystal display drive circuits 34 of random access memory ram to do the operation of bi-directional data mapping, time controlled system 31 is also made read mode to the data of random access memory ram 33 simultaneously, write pattern, and read the back modified pattern that writes again etc. and make two-way switch operating, in addition, time controlled system 31 is under test pattern control, output display frequency signal is to liquid crystal display drive circuit 34, then elasticity week of planning by the bias voltage and the program of the control able to programme that it received of driving circuit 34 its, its single-point number that can be suitable for different LCD plate application and timely modification display panel has been shaken export display panels 35 its segmentation viewing areas of demonstration data of limit together again to, and time controlled system another the group output/input system 2, shown in dotted line, under normal mode control, the frequency signal of control able to programme is provided by frequency divider, give timer or supervision timer, produce interrupt request signal output when making its overflow.
The structure explanation of time controlled system, see also Fig. 4, Fig. 4 is the time controlled system structural map of the embodiment of the invention, wherein, by transmission ends 3 input frequency signals of the required external oscillator of external oscillator or quartz (controlled) oscillator 412 or the oscillation frequency signal that is produced by the built-in oscillator 411 of time controlled system, through multiplex's switch 413, select wherein a kind of frequency signal, then transport to built-in frequency divider (frequency divider) 414, the frequency 417 of control able to programme is provided under normal mode, can enter the enabler 415 in the buzzing system, and additional power source V DDAgain by its buzzing output terminal 416, produce the sound of buzzing, or provide the frequency 417 of control able to programme, enter the enabler 418 in the interrupt request system, again during incoming timing device 419, old data or the signal that must remove timer earlier and had, the ability input frequency signal: equally, during input supervision timer 420 frequency signals, also old data or the signal that timer is deposited supervised in removing earlier, the ability input frequency signal, by their overflow action,, select a kind of frequency signal input enabler 423 by multiplex's switch 421, cooperate again by supervising synchronous or door (OR GATE) the 422 two ends input of timer enable signal and timer enable signal, then itself or door (OR GATE) 422 produce output terminals and enable trigger pip, make time controlled system by interrupt request output terminal 424, produce interrupt request signal.In addition, this built-in frequency divider 414, under test pattern, the signal of output low level to door (AND GATE) 425,426 of buzzing input ends are not imported any frequency signal, then do not have the output of display frequency signal, then promptly provide the frequency signal of control able to programme to buzzing system or interrupt request system this moment with door (AND GAIE) 425 output terminals; If the signal of frequency divider 414 output high level to door (AND GAIE) 425, and, then have the display frequency signal to export liquid crystal display drive circuit to door (AND GATE) 425 output terminals by buzzing input end 426 input frequency signals.
See also Fig. 5, Fig. 5 is the course of work process flow diagram of the embodiment of the invention, at first, in step 51, start power supply, then in step 52, by microcontroller control signal and data are inputed in the drive unit of the present invention, and in step 54, by outside input frequency signal, or step 55 by the built-in frequency signal 55 that produces voluntarily in time controlled system, after the time controlled system of drive unit of the present invention receives, in step 53, this time controlled system can transmission signals or data, wherein in step 531, through instruction decoder, the decodes commands signal, judge in step 532 more whether its decoding is finished, then decode again if not, according to decoded information, this moment, time controlled system and random access memory can write pattern in step 561, make read mode and read the back modified isotype operation that writes again in step 550 in step 560, then in step 551, the data of random access memory are exported to the operating system (step 53) of test pattern or normal mode by time controlled system.Shown in step 552, be selected at test mode operation, in step 553, the frequency signal of frequency divider stop supplies control able to programme, then in step 554, again by buzzing end input frequency signal, in step 555, export display frequency again, make it can be in step 556, the segmentation viewing area of test fluid LCD panel and copolar point part, end of run in step 557, if in step 533, select normal mode, then when step, the device of present embodiment writes random access memory with decoded data, again in step 536, map data into driving circuit, in step 555, the display frequency of this driving circuit time of reception controller output reaches in step 537, and this driving circuit receives the bias voltage and the elasticity cycle data of control able to programme, then in step 538, this liquid crystal panel can show data and the video data of revising, up in step 557, EO, normal mode 533 also can be provided the frequency signal 535 of control able to programme by frequency divider, make them can be in 541, select buzzing system generation buzzer or in step 542, make timer or supervision timer overflow, in step 543, produce interrupt request signal, up to step 557, end of run is if system halt then built-in oscillator of running or external oscillator quit work, carry out the situation of sleep, to reach the effect of power saving.
In sum, when knowing that the present invention can provide utilization and the tool progressive on the industry, and the present invention do not see any publication, when the regulation that meets the 22 of Patent Law.
Below only be preferred embodiment explanation of the present invention, all other all variations ought still belong to spirit of the present invention and claims institute restricted portion.

Claims (7)

1. the method selected of a LCD driver enhancing multi-functional, it is characterized in that, by time controlled system transmission decoded signal or command code, accept decoded signal and the command code that time controlled system transmits by instruction decoder, and this command code is decoded as normal mode and test pattern, random access memory is accepted the decoded data that instruction decoder transmits, described LCD driver is accepted the display frequency and the random access memory institute mapped data of time controlled system, makes LCD driver have the selection video data, buzzing, each action of interrupt request signal or test.
2. the method that LCD driver enhancing multi-functional as claimed in claim 1 is selected is characterized in that, the step of carrying out test is:
A is by outside input frequency signal or produce frequency signal and control signal and data sync voluntarily and input to time controlled system;
B time controlled system transmission signals or data;
C time controlled system and random access memory are writing pattern, read mode or are reading back modified writing again under the pattern operation, access data and time control system synchronous transmission command code and decoded signal entry instruction demoder are so that instruction decoder is decoded;
D judges whether to decode and finishes;
If e then feedback decoding data to time controlled system carries out test pattern, then continue decoding if not;
The f frequency divider stops to provide the frequency signal of control able to programme;
G buzzing end input frequency signal;
The h display frequency is transported to driving circuit by time controlled system;
The segmentation viewing area of i test fluid LCD panel and copolar point part;
J work is finished.
3. the method that LCD driver enhancing multi-functional as claimed in claim 1 is selected is characterized in that, the step of carrying out video data is:
A is by outside input frequency signal or produce frequency signal and control signal and data sync voluntarily and input to time controlled system;
B time controlled system transmission signals or data;
C time controlled system and random access memory are writing pattern, read mode or are reading back modified writing again under the pattern operation, access data and time control system synchronous transmission command code and decoded signal entry instruction demoder are so that demoder is decoded;
D judges whether to decode and finishes;
If e then feedback decoding data to time controlled system carries out the normal mode operation, then continue the decoding action if not;
F writes random access memory;
G will deposit the data map of random access memory in to driving circuit;
H by time controlled system in test pattern output frequency to driving circuit;
The i driving circuit will be accepted the bias voltage and the elasticity cycle data of control able to programme, and data or the data revised are transported to display panels;
The j display panels shows its data;
K is up to end of run.
4. the method that LCD driver enhancing multi-functional as claimed in claim 1 is selected is characterized in that, the step of carrying out buzzing is:
A is by outside input frequency signal or produce frequency signal voluntarily and control signal and data sync control system input time;
B time controlled system transmission signals or data;
C time controlled system and random access memory are writing pattern, read mode or are reading back modified writing again under the pattern operation, access data and time control system synchronous transmission command code and decoded signal entry instruction demoder are so that this instruction decoder decoding;
D judges whether to decode and finishes;
If e then feedback decoding data to time controlled system carries out the normal mode operation, then continue the decoding action if not;
The f frequency divider provides the frequency signal of control able to programme;
G then produces buzzer;
The h operation is finished.
5. the method that LCD driver enhancing multi-functional as claimed in claim 1 is selected is characterized in that, the step of carrying out the look-at-me requirement is:
A is by outside input frequency signal or produce frequency signal and control signal and data sync voluntarily and input to time controlled system;
B time controlled system transmission signals or data;
C time controlled system and random access memory are writing pattern, read mode or are reading that the back is modified to write under the pattern operation access data and time control system synchronous transmission command code and decoded signal entry instruction decoder decode again;
D judges whether to decode and finishes;
If e then feedback decoding data to time controlled system carries out the normal mode operation, then continue the decoding action if not;
The f frequency divider provides the frequency signal of control able to programme;
G timer or supervision timer overflow;
The h interrupt request signal produces;
The I end of run.
6. the device that the LCD driver enhancing multi-functional is selected is made up of time controlled system and liquid crystal display drive circuit, it is characterized in that, the device that this LCD driver enhancing multi-functional is selected also comprises:
Instruction decoder is accepted decoded signal and command code that time controlled system transmits, and this command code is decoded as normal mode and test pattern;
Random access memory can be accepted the decoded data that instruction decoder transmits;
Described liquid crystal display drive circuit is accepted the display frequency and the random access memory institute mapped data of time controlled system, so that data export display panels to.
7. the device that LCD driver enhancing multi-functional as claimed in claim 6 is selected is characterized in that this time controlled system comprises:
Built-in oscillator produces oscillation frequency signal voluntarily;
External oscillator is by outside input oscillation frequency signal;
Multiplex's switch is electrically connected to this built-in oscillator and this external oscillator, the signal of can choosing any one kind of them;
Frequency divider is electrically connected the frequency that this multiplex's switch provides control able to programme;
Hummer provides the frequency signal of control able to programme by this frequency divider, makes it produce buzzing;
The interrupt request system provides the frequency signal of control able to programme by this frequency divider, through timer or supervision timer overflow, makes it produce interrupt request signal;
The input signal system accepts to read the numerical digit signal, writes the numerical digit signal, selects numerical digit signal and data.
CNB971120978A 1997-05-22 1997-05-22 Method and device for enhancing multi-functional selection with liquid crystal displaying driver Expired - Lifetime CN1324552C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CNB971120978A CN1324552C (en) 1997-05-22 1997-05-22 Method and device for enhancing multi-functional selection with liquid crystal displaying driver
HK97101809A HK1002161A2 (en) 1997-05-22 1997-09-22 An improved multi-function selecting device for lcd driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB971120978A CN1324552C (en) 1997-05-22 1997-05-22 Method and device for enhancing multi-functional selection with liquid crystal displaying driver

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CN1200528A CN1200528A (en) 1998-12-02
CN1324552C true CN1324552C (en) 2007-07-04

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HK (1) HK1002161A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100334459C (en) * 2003-06-09 2007-08-29 统宝光电股份有限公司 Organic luminescent display pixel testing method and apparatus
US8942764B2 (en) * 2007-10-01 2015-01-27 Apple Inc. Personal media device controlled via user initiated movements utilizing movement based interfaces
CN103884979B (en) * 2014-03-13 2016-09-07 江苏钜芯集成电路技术股份有限公司 A kind of batch testing method of wireless two-in-one mouse end chip

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111196A (en) * 1987-03-23 1992-05-05 Esl, Inc. Electronic information display module and connector therefor
JPH08146922A (en) * 1994-11-18 1996-06-07 Fujitsu General Ltd Liquid crystal projector
JPH08292744A (en) * 1995-04-24 1996-11-05 Sharp Corp Liquid crystal display device
CN1148216A (en) * 1994-12-21 1997-04-23 合泰半导体股份有限公司 Device for controlling display device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111196A (en) * 1987-03-23 1992-05-05 Esl, Inc. Electronic information display module and connector therefor
JPH08146922A (en) * 1994-11-18 1996-06-07 Fujitsu General Ltd Liquid crystal projector
CN1148216A (en) * 1994-12-21 1997-04-23 合泰半导体股份有限公司 Device for controlling display device
JPH08292744A (en) * 1995-04-24 1996-11-05 Sharp Corp Liquid crystal display device

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CN1200528A (en) 1998-12-02

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