CN100382138C - Command register composition method of LCD driving chip - Google Patents
Command register composition method of LCD driving chip Download PDFInfo
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- CN100382138C CN100382138C CNB200510125932XA CN200510125932A CN100382138C CN 100382138 C CN100382138 C CN 100382138C CN B200510125932X A CNB200510125932X A CN B200510125932XA CN 200510125932 A CN200510125932 A CN 200510125932A CN 100382138 C CN100382138 C CN 100382138C
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G3/2096—Details of the interface to the display terminal specific for a flat panel
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2370/00—Aspects of data communication
- G09G2370/08—Details of image data interface between the display device controller and the data line driver circuit
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a command register composition method of LCD driving chip. In the register of LCD driving chip, the invention constitutes effectively 16 bit register saved by the order image random storage so as to transmit the necessary image data to the image random storage correctly in the interface mode having a plurality of bus width. For the register of LCD driving chip of the mobile communication terminal using 16 bit and 8 bit interface mode with different bus width, the invention comprises: in the said 16 bit register of the LCD driving chip, only identifying the command address of high 8 bit and identifying the low 8 bit as the irrespective bit to the follow order; for not identifying the 8 bit as the irrespective bit as the data in the interface mode for the order, the low 8 bit is set as the register of bit corresponding to the bus width so as to use the low 8 bit as the order data to the said order.
Description
Technical field
The present invention relates to the command register composition method of LCD chip for driving, especially relate to a kind of in the register of the LCD of mobile communication terminal chip for driving (Driver IC), constitute 16 bit register that order figure random access memory (GRAM:Graphic RAM) is preserved effectively, thereby can under interface modes, accurately transmit the command register composition method of the LCD chip for driving of the image data that needs to the figure random access memory with multiple highway width (Bus Width).
Background technology
Generally speaking, in the LCD chip for driving register of existing mobile communication terminal, in 16 bit register of order figure random access memory (GRAM) record, the method that register is set according to highway width has nothing in common with each other.Therefore, can't accurately transmit the image data that needs to the figure random access memory, cause the unsharp problem of image quality from mainframe memory.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of command register composition method of LCD chip for driving, in the register of the LCD of mobile communication terminal chip for driving (Driver IC), 16 bit register that effective constitution order figure random access memory (GRAM) is preserved, thereby can under interface modes, accurately transmit the image data that needs to the figure random access memory with multiple highway width (Bus Width).
For achieving the above object, use 16 different bits of highway width (Bus Width) simultaneously at constituting, the mobile communication terminal LCD driving chip of 8 bit interface patterns (Driver IC) register, feature of the present invention is: in 16 bit register interface modes of described LCD chip for driving, its interface command form is a command address of only discerning high 8 bits, low 8 bit recognition are irrelevant (Don ' t care) bit, for described command format, in order to be unlikely to wrong under 8 bit interface patterns is above-mentioned irrelevant bit recognition data, can be at the register of low 8 bit settings and the corresponding bit value of highway width, so that low 8 bits are used as order data.
Of the present inventionly to be intended to provide a kind of technology, in the register of the LCD of mobile communication terminal chip for driving, as other control command register, 16 bit register at order record (Write) in the figure random access memory, high 8-bit is command address (Command Address), low 8-bit is order data (Command Data), constitute register clearly, can in the order data of low 8-bit, be provided with and the corresponding bit value of each highway width (Bus Width), thereby can from mainframe memory, correctly be transferred to figure random access memory (GRAM) to the image data that needs.That is, adopt the present invention under interface modes, can correctly transmit the image data that needs to the figure random access memory with multiple highway width (Bus Width).
Description of drawings
Fig. 1 is the exemplary plot that shows the general orders data layout of existing 16 bit interface patterns;
Fig. 2 is used to illustrate that general figures random access memory record and bit shield the exemplary plot of control command function;
Fig. 3 is the exemplary plot that is presented at the data layout of the figure random access memory record order under the existing 16 bit interface patterns;
Fig. 4 is the exemplary plot of the data layout that shows that general orders under the existing 8 bit interface patterns and figure random access memory record are required;
Fig. 5 is used to illustrate of the present inventionly carry out the exemplary plot that highway width is provided with required command register form under 8 bits or 16 bit interface patterns.
Embodiment
With reference to the accompanying drawings, describe useful embodiment of the present invention in detail.
At first it should be noted that giving to the inscape of each accompanying drawing aspect the reference marks,,, also given identical symbol as far as possible even be shown in the different accompanying drawings for identical inscape.
In addition, in following explanation, concrete numerous specific details such as treatment scheme have been shown, so that more fully understand the present invention.Do not having under the situation of these specific details, the present invention still can implement, and this is that to have this technical field Chang Shizhe self-explantory.
And, think well-known function and the formation that may obscure main idea of the present invention for judgement, omitted detailed description thereof.
Generally speaking, under 16 bit interface patterns of the LCD chip for driving of existing mobile communication terminal, the form that order LCD drives as shown in Figure 1, high 8 bits are command addresses, low 8 bits are order datas.
For example, when being the LCD chip for driving of control command function (Control Command Function) with above-mentioned Fig. 2, if in " bit function of shielding 3 " function blueness (blue) data of shielding in (masking) image data, so, with form as shown in Figure 1, high 8 bits are provided with register by 0x0Ch, and low 8 bits are provided with register by 0x01h and get final product.
Wherein, " 0x " and " h " all represents 16 system numbers among the 0x0Ch, only writes that one of them is also passable, and 16 system numbers of " 0C " between " 0x " and " h " expression 8 bits." RW " " W " is the type of expression register, refers to read-write register and write-only register respectively; BMSKB is meant the bit value that the bit shielding is provided with.
When order data was figure random access memory (GRAM) record order data layout, high 8 bits were provided with register by 0x0Eh, and as shown in Figure 3, because low 8 bits are irrelevant (don ' t care) bits, so it is all irrelevant to be arranged to which kind of value.
But,, then be identified as the LCD data are write down in requirement in figure random access memory (GRAM) order if the address bit value of high 8 bits only is set.After having carried out figure random access memory record order function like this, image data is transferred to figure random access memory (GRAM) from mainframe memory.
In contrast, the general control command of 8 bit interface patterns and figure random access memory record order form constitute command address all as shown in Figure 4 in the period 1 (Cycle), constitute order data in second round.
Therefore, 8 bit interface patterns too, if in " bit function of shielding 3 " function the blue data of shielding in the image data, so, need be with form as shown in Figure 4, at zero-address in the cycle, by the 0x0Ch differentiation register is set, in cycle data, register is set by the 0x01h differentiation.
If realize 16 bit interface patterns and 8 bit interface patterns respectively, need carry out coding work to LCD drive source code according to each interface modes according to different situations.
, in this step, the step of figure random access memory (GRAM) record is set in existing LCD chip for driving register, the possibility that fatal error takes place is very high.
Under 16 bit interface patterns of as above LCD chip for driving, when carrying out figure random access memory (GRAM) record order, high 8 bits are provided with register by 0x0Eh, low 8 bits are set to arbitrary value owing to be irrelevant (don ' t care) bit.
For example,, also it is identified as meaningless values, can have any problem even be provided with low 8 bits by 0x00h.
That is, in figure random access memory (GRAM) though in the order of writing down only need high address 8 bits, under 16 bit interface patterns, each time clock is transmitted 16 bits, therefore, together sends insignificant low 8 bits.
But, if the figure random access memory record order (0x0E00h) that as above is made of 16 bits is directly applied to 8 bit interface patterns, then can be identified as the order of record LCD data because of the 0x0Eh of high 8 bits, make a mistake, that is, be identified as the LCD image data that will write down low 8 bit 0x00h.
For example, in the time will being set to 0x12,0x34,0xf2,0x94.... to the LCD data that in the figure random access memory, write down, normal, 0x12 and 0x34 constitute 1pixel (65K color benchmark), when under as above situation (when by 16 bits command " 0x0E00h " when issuing an order), 0x00 and 0x12 are identified as 1 pixel.
That is, the low 1 byte mistake of 16 bits command is identified as the LCD record data, by being that the form that unit is shifted continuously shows 1 pixel with 1 byte, the result can't obtain the LCD data of needs, and image quality is impacted.
Therefore, in the present invention, figure random access memory (GRAM) record order form is also as other control command register, high 8 bits are command address, low 8 bits are order data, constitute register clearly, in the order data of low 8 bits, be provided with and the corresponding bit value of each highway width (Bus Width).
For example, as shown in Figure 5, under 8 bit interface patterns, by 0x01h low 8 bits of figure random access memory (GRAM) record order are set, in 16 bit interface patterns, low 8 bits of figure random access memory (GRAM) record order are set by 0x02h, so, will be as other control command register, making low 8 bit recognition is order data, can not make as above mistake, can correctly be transferred to figure random access memory (GRAM) to the image data of needs from mainframe memory.
That is to say, in the LCD chip for driving register of existing mobile communication terminal, in 16 bit register of order figure random access memory (GRAM) record, difference along with highway width (Bus Width), the method that register is set is different, therefore, can't correctly be transferred to figure random access memory (GRAM) to the image data of needs probably.
But, for the present invention, in the register of the LCD of mobile communication terminal chip for driving, when constituting 16 bit register of order figure random access memory (GRAM) record, as other control command register, high 8 bits are command address, low 8 bits are order data, constitute register clearly, can be at the order data setting and the corresponding bit value of each highway width of low 8 bits, therefore, existence can correctly be transferred to the image data of needs from mainframe memory the difference of figure random access memory (GRAM).
In sum, the command register composition method of LCD chip for driving of the present invention is in the register of the LCD of mobile communication terminal chip for driving (Driver IC), constitute 16 bit register that order figure random access memory (GRAM) is preserved effectively, therefore has following effect, promptly, under interface modes, can correctly transmit the image data that needs to the figure random access memory with multiple highway width (Bus Width).
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (4)
1. the command register composition method of a LCD chip for driving, use 16 different bits of highway width simultaneously at constituting, the register of the LCD chip for driving of the mobile communication terminal of 8 bit interface patterns, it is characterized in that: in 16 bit register interface modes of described LCD chip for driving, its interface command form is a command address of only discerning high 8 bits, low 8 bit recognition are irrelevant bit, for described command format, in order to be unlikely to wrong under 8 bit interface patterns is described irrelevant bit recognition data, can be at the register of described low 8 bit settings and the corresponding bit value of highway width, so that described low 8 bits are used as order data.
2. the command register composition method of LCD chip for driving according to claim 1 is characterized in that: described order is a figure random access memory record order.
3. the command register composition method of LCD chip for driving according to claim 1 and 2 is characterized in that: under 8 bit interface patterns, low 8 bits of described figure random access memory record order are set by preassigned setting value; Under 16 bit interface patterns,, thereby can be low 8 bit recognition order data as other control command register by preassigned another kind of setting value setting.
4. the command register composition method of LCD chip for driving according to claim 3 is characterized in that: the setting value under described 8 bit modes is 0x01h; Setting value under described 16 bit modes is 0x02h.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050008371 | 2005-01-29 | ||
| KR1020050008371A KR100641184B1 (en) | 2005-01-29 | 2005-01-29 | Command register setting method for lcd driver ic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1811889A CN1811889A (en) | 2006-08-02 |
| CN100382138C true CN100382138C (en) | 2008-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510125932XA Expired - Fee Related CN100382138C (en) | 2005-01-29 | 2005-11-29 | Command register composition method of LCD driving chip |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100641184B1 (en) |
| CN (1) | CN100382138C (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5337409A (en) * | 1991-07-31 | 1994-08-09 | Kabushiki Kaisha Toshiba | Parallel/serial data conversion system |
| JPH07220468A (en) * | 1994-01-26 | 1995-08-18 | Samsung Electron Co Ltd | Method for accessing ram array and graphic ram using accessing method thereof |
| US5900887A (en) * | 1997-05-05 | 1999-05-04 | Neomagic Corp. | Multiplexed wide interface to SGRAM on a graphics controller for complex-pattern fills without color and mask registers |
| US5905914A (en) * | 1992-09-17 | 1999-05-18 | Kabushiki Kaisha Toshiba | Portable computer having dedicated register group and peripheral controller bus between system bus and peripheral controller |
| CN1283842A (en) * | 1999-08-10 | 2001-02-14 | 日本电气株式会社 | Colour liquid crystal display and its displaying method |
| US6437790B1 (en) * | 1984-10-05 | 2002-08-20 | Hitachi, Ltd. | Apparatus for bit operational process |
| JP2004139431A (en) * | 2002-10-18 | 2004-05-13 | Seiko Epson Corp | Method and device for controlling data transfer and display device |
-
2005
- 2005-01-29 KR KR1020050008371A patent/KR100641184B1/en not_active IP Right Cessation
- 2005-11-29 CN CNB200510125932XA patent/CN100382138C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6437790B1 (en) * | 1984-10-05 | 2002-08-20 | Hitachi, Ltd. | Apparatus for bit operational process |
| US5337409A (en) * | 1991-07-31 | 1994-08-09 | Kabushiki Kaisha Toshiba | Parallel/serial data conversion system |
| US5905914A (en) * | 1992-09-17 | 1999-05-18 | Kabushiki Kaisha Toshiba | Portable computer having dedicated register group and peripheral controller bus between system bus and peripheral controller |
| JPH07220468A (en) * | 1994-01-26 | 1995-08-18 | Samsung Electron Co Ltd | Method for accessing ram array and graphic ram using accessing method thereof |
| US5900887A (en) * | 1997-05-05 | 1999-05-04 | Neomagic Corp. | Multiplexed wide interface to SGRAM on a graphics controller for complex-pattern fills without color and mask registers |
| CN1283842A (en) * | 1999-08-10 | 2001-02-14 | 日本电气株式会社 | Colour liquid crystal display and its displaying method |
| JP2004139431A (en) * | 2002-10-18 | 2004-05-13 | Seiko Epson Corp | Method and device for controlling data transfer and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060087330A (en) | 2006-08-02 |
| CN1811889A (en) | 2006-08-02 |
| KR100641184B1 (en) | 2006-11-06 |
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| C14 | Grant of patent or utility model | ||
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Owner name: LANGCHAO LEJIN DIGITAL MOBILE COMMUNICATION CO., L Free format text: FORMER OWNER: LG ELECTRONICS (CHINA) R + D CENTER CO., LTD. Effective date: 20120328 |
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Free format text: CORRECT: ADDRESS; FROM: 100102 CHAOYANG, BEIJING TO: 264001 YANTAI, SHANDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120328 Address after: 264001 No. 228 Changjiang Road, Yantai economic and Technological Development Zone, Shandong, China Patentee after: Langchao Lejin Digital Mobile Communication Co., Ltd. Address before: Two Beijing 100102 Chaoyang District city in Wangjing Lize Park No. 203 Petrova building block B Patentee before: LG Electronic (China) Research and Development Center Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20141129 |
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