CN111968593A - Split-screen display driving method of ultra-clear liquid crystal module - Google Patents
Split-screen display driving method of ultra-clear liquid crystal module Download PDFInfo
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- CN111968593A CN111968593A CN202010932005.3A CN202010932005A CN111968593A CN 111968593 A CN111968593 A CN 111968593A CN 202010932005 A CN202010932005 A CN 202010932005A CN 111968593 A CN111968593 A CN 111968593A
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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
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Abstract
A split-screen display driving method of an ultra-clear liquid crystal module comprises the following steps: a single chip microcomputer is used as a main control chip, and all I/O ports on the single chip microcomputer are classified; selecting two SSD1963 display controllers, wherein one SSD1963 display controller is connected with an I/O port on the single chip microcomputer, and the two SSD1963 display controllers are connected in a cascade manner; the output port of the SSD1963 display controller is connected with the TFT module through a line; different driving conditions are set for the two SSD1963 display controllers, the single chip microcomputer sends data commands, the two SSD1963 display controllers basically and alternately display data sent by the single chip microcomputer, and the SSD1963 display controllers realize split-screen display. The invention can drive the test of the module below FHD through the cascade connection of the single chip microcomputer and two SSD1963 display controllers, improves the original 800X 480X 24BIT data drive, reduces the operation cost of the module processing factory in the test of the liquid crystal module with higher definition, and can be applied to the design of the test mainboard in a company. The test of making things convenient for module factory detects and efficiency of software testing.
Description
Technical Field
The invention relates to the technical field of liquid crystal modules, in particular to a split-screen display driving method of an ultra-clear liquid crystal module.
Background
Currently, the drive boards of SSD1963 chips are available on the market, and the highest resolution of the drive is 800 × 480 × 24bit (rgb), while ARM boards are used for those with resolutions higher than 800 × 480 × 24bit (rgb). In the liquid crystal module industry, the cost of applying the ARM test board in a general module assembly plant is too high, and the common use of small size and large size is required. The universal test board and different test switching boards are used, and the switching working hours and labor cost are higher for companies with wide development cases. Each type or each glass IC corresponds to a complete set of side frames and a customer external borrowing frame, which wastes too much cost, while the general ARM board is sold by scheme companies and has great testing cost. Therefore, a relatively expensive split-screen display driving method for the liquid crystal module is urgently needed.
Disclosure of Invention
In order to solve the technical problem, the invention provides a split-screen display driving method of an ultra-clear liquid crystal module.
In order to solve the technical problems, the invention adopts the following technical scheme:
a split-screen display driving method of an ultra-clear liquid crystal module comprises the following steps:
a single chip microcomputer is used as a main control chip, and all I/O ports on the single chip microcomputer are classified;
selecting two SSD1963 display controllers, wherein one SSD1963 display controller is connected with an I/O port on the single chip microcomputer, and the two SSD1963 display controllers are connected in a cascade manner;
the output port of the SSD1963 display controller is connected with the TFT module through a line;
different driving conditions are set for the two SSD1963 display controllers, the single chip microcomputer sends data commands, the two SSD1963 display controllers basically and alternately display data sent by the single chip microcomputer, and the SSD1963 display controllers realize split-screen display.
The SSD1963 display controller sets two different initializations and two different driving conditions for the two SSD1963 display controllers through the HD resolution screen driven by the parallell RGB interface, and controls and drives the two SSD1963 display controllers respectively.
The SSD1963 display controller transmits module differential signals through the LVDS interface, an LVDS interface conversion chip is connected to the SSD1963, two SSD1963 display controllers are respectively provided with two different driving conditions, chip signals are replaced to the LVDS interface, and then the module differential signals are transmitted outwards.
The SSD1963 display controller is externally connected with an MIPI interface conversion board, three stages of initialization are set for the SSD1963 display controller, and signals are transmitted to the MIPI interface conversion board.
And a signal adder is arranged on a connecting line of the single chip microcomputer and the SSD1963 display controller, and is used for performing signal enhancement on each RGB data line and each signal control line.
The output interface of the SSD1963 has a bead of 100 ohms or less attached thereto, which reduces CLK interference.
The invention can drive the test of the module below FHD through the cascade connection of the single chip microcomputer and two SSD1963 display controllers, improves the original 800X 480X 24BIT data drive, reduces the operation cost of the module processing factory in the test of the liquid crystal module with higher definition, and can be applied to the design of the test mainboard in a company. The test of making things convenient for module factory detects and efficiency of software testing.
Drawings
FIG. 1 is a schematic diagram of I/O port classification of a single chip microcomputer;
fig. 2 is a schematic diagram of an LVDS interface tamper-proof according to the present invention.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
The invention provides a split-screen display driving method of an ultra-clear liquid crystal module, which comprises the following steps of:
and the singlechip is used as a main control chip to classify all I/O ports on the singlechip. The singlechip is 51 singlechips, through categorised, can carry out abundant application with idle IO mouth. Such as P1.0, P1.1, P2.0, P2.1, etc., as shown in FIG. 1.
Two SSD1963 display controllers are selected, one SSD1963 display controller is connected with an I/O port on the single chip microcomputer, and the two SSD1963 display controllers are connected in a cascade mode.
The SSD1963 shows that the output port of the controller is connected to the TFT module by a wire.
In order to ensure that the signal level output by the 5 single chip microcomputer cannot cause the poor signal, interference, dim display and other adverse phenomena due to the fact that the signal is weak because a line is slightly long. And each RGB data line and signal control line are subjected to signal enhancement between the single chip microcomputer and the SSD196 display controller, so that good output signals are ensured.
In addition, different interfaces of the TFT module can be utilized, the functional requirements on the I/O port are different, and the same I/O can be repeatedly utilized to be programmed so as to meet different use requirements.
SSD1963 shows that the controller also boosts the output signal of the interface so that the signal input to the TFT module can be smoothly and sufficiently transmitted. Experiments show that the problem of interference of CLK can be effectively reduced by using a magnetic bead with the resistance of 100 ohms or less, so that the magnetic bead is attached to an output interface of an SSD1963, CLK controls PIN to be processed independently, signal interference is released to the ground, capacitance of the signal interference released to the ground is selected, attention is paid to capacitance, the capacitance of a TFT module CLK needs to be PF level, and the embodiment can select a 22PF capacitance, as shown in FIG. 2.
In addition, in the laying problem of the circuit, if the signal line and the control line from the single chip microcomputer and the SSD1963 display controller have intersection, parallel wiring is avoided, and crossed wiring is adopted, so that the crossed overlapping area is minimized, the interference of the wiring is minimized, and the performance of the test board is improved.
In addition, when the SSD1963 display controller is externally connected with the LVDS driving interface, a differential signal interference prevention design is performed, as shown in fig. 1, when a capacitor FR is provided at a corresponding resistor, and when a plurality of connection lines are provided, FR1, FR2, FR3, etc. are correspondingly provided, thereby achieving the purpose of interference resistance.
Different driving conditions are set for the two SSD1963 display controllers, the single chip microcomputer sends data commands, the two SSD1963 display controllers basically and alternately display data sent by the single chip microcomputer, and the SSD1963 display controllers realize split-screen display.
The SSD1963 display controller sets two different initializations and two different driving conditions for the two SSD1963 display controllers through the HD resolution screen driven by the parallell RGB interface, and controls and drives the two SSD1963 display controllers respectively.
The SSD1963 display controller transmits module differential signals through the LVDS interface, an LVDS interface conversion chip is connected to the SSD1963, two SSD1963 display controllers are respectively provided with two different driving conditions, chip signals are replaced to the LVDS interface, and then the module differential signals are transmitted outwards.
The SSD1963 display controller is externally connected with an MIPI interface conversion board, three-section initialization is set for the SSD1963 display controller, and a certain I/O port can be repeatedly used through different application subprograms to transmit signals to the MIPI interface conversion board.
Through the combination of the hardware and the control, the SSD1963 can use the same 51 single chip microcomputer, two SSD1963 chips are added, an idle I/O port of the 51 single chip microcomputer is used, the two SSD1963 chips are controlled at the same time, and the SSD1963 is cascaded through an expanded I/0 port of the SSD1963, so that module test drive display of 1024 × 600 × 24 bits or 1280 × 800 × 18 bits can be driven. The processing results show that SSD1963 is shown by cascading data that is 864 × 480 × 24bit × 2 times drivable. The SSD1963 is used for cascading two ICs, so that the test of the modules below the FHD can be driven, the original 800 × 480 × 24BIT data driving is improved, and the operation cost of the module processing factory in the test of the liquid crystal module with higher definition is reduced. And can be applied to test motherboard designs inside a company. The test of making things convenient for module factory detects and efficiency of software testing. Split screen display and test drive to drive HD pixels.
Although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications, equivalents, improvements, and the like can be made in the technical solutions of the foregoing embodiments or in some of the technical features of the foregoing embodiments, but those modifications, equivalents, improvements, and the like are all within the spirit and principle of the present invention.
Claims (6)
1. A split-screen display driving method of an ultra-clear liquid crystal module comprises the following steps:
a single chip microcomputer is used as a main control chip, and all I/O ports on the single chip microcomputer are classified;
selecting two SSD1963 display controllers, wherein one SSD1963 display controller is connected with an I/O port on the single chip microcomputer, and the two SSD1963 display controllers are connected in a cascade manner;
the output port of the SSD1963 display controller is connected with the TFT module through a line;
different driving conditions are set for the two SSD1963 display controllers, the single chip microcomputer sends data commands, the two SSD1963 display controllers basically and alternately display data sent by the single chip microcomputer, and the SSD1963 display controllers realize split-screen display.
2. The method for driving a split-screen display of an ultra-clear liquid crystal module according to claim 1, wherein the SSD1963 display controller sets two different initialization and two different driving conditions for the two SSD1963 display controllers through the HD resolution screen driven by the parallell RGB interface, and controls and drives the two SSD1963 display controllers respectively.
3. The method for driving the split-screen display of the ultra-clear liquid crystal module according to claim 2, wherein the SSD1963 display controller transmits the module differential signal through the LVDS interface, the SSD1963 is attached with the LVDS interface conversion chip, the two SSD1963 display controllers set two different driving conditions respectively, replace the chip signal to the LVDS interface, and transmit the module differential signal to the outside.
4. The method for driving the split-screen display of the ultra-clear liquid crystal module according to claim 3, wherein the SSD1963 display controller is externally connected with an MIPI interface conversion board, three-stage initialization is set for the SSD1963 display controller, and signals are transmitted to the MIPI interface conversion board.
5. The method as claimed in claim 4, wherein a signal adder is disposed on a connection line between the single chip and the SSD1963 display controller to enhance signals of each RGB data line and each signal control line.
6. The method as claimed in claim 5, wherein the output interface of the SSD1963 has beads with saturation attenuation CLK interference of less than 100 ohms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010932005.3A CN111968593A (en) | 2020-09-08 | 2020-09-08 | Split-screen display driving method of ultra-clear liquid crystal module |
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| CN107665690A (en) * | 2017-10-27 | 2018-02-06 | 成都九洲电子信息系统股份有限公司 | Display system based on TTL interface RGB mode activated double screen colour same images |
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2020
- 2020-09-08 CN CN202010932005.3A patent/CN111968593A/en active Pending
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Application publication date: 20201120 |