CN202205437U - Display and control chip - Google Patents

Display and control chip Download PDF

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Publication number
CN202205437U
CN202205437U CN2011203228825U CN201120322882U CN202205437U CN 202205437 U CN202205437 U CN 202205437U CN 2011203228825 U CN2011203228825 U CN 2011203228825U CN 201120322882 U CN201120322882 U CN 201120322882U CN 202205437 U CN202205437 U CN 202205437U
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China
Prior art keywords
encryption
data
display
unit
decryption element
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Withdrawn - After Issue
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CN2011203228825U
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Chinese (zh)
Inventor
李凤石
方翔
马钊
崔良金
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Beijing Tocel Electronics Co Ltd
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Beijing Tocel Electronics Co Ltd
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Priority to CN2011203228825U priority Critical patent/CN202205437U/en
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Anticipated expiration legal-status Critical
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Abstract

The utility model discloses a display and control chip which is used for improving the date safety and realizing chip integration. The display and control chip comprises a display control unit, an encryption and decryption unit and a display drive unit, wherein, the display control unit is connected with the encryption and decryption unit, and the encryption and decryption unit is connected with the display drive unit; the display control unit is used for converting the data of an oiling machine main board outside the display and control chip into the data format required by the encryption and decryption unit, sending the data format to the encryption and decryption unit, and converting the data sent by the encryption and decryption unit into serial data for being sent to the oiling machine main board; the encryption and decryption unit is used for performing decryption to received the encryption data sent by the display control unit, sending the decryption data to the display drive unit, and also sending the encrypted identity certification information to the oiling machine main board through the display control unit; and the display drive unit is used for converting the decrypted data into liquid crystal drive signal for being sent to an LCD.

Description

A kind of display control chip
Technical field
The utility model relates to electronic technology and fuel charger field, particularly relates to display control chip.
Background technology
Fuel charger is as a kind of measurement instrument, and its accuracy of measuring is most important.Some fuel chargers are in the process that reality is used, and the accuracy of measuring is undesirable, have artificial or unartificial oil and leakage of oil behavior steathily.Main fraudulent means below existing under the common situation: the measuring software cheating is revised in (1), as changing the pulse equivalency in the measuring software; (2) pulse signal transmission channel cheating is as inserting pulse signal; (3) pulse signal source cheating: pilosity send pulse signal, 100 pulses of for example actual generation, but send 110 pulses through intelligent device.Present fuel charger will possess anti-deception function, and explicitly calls for regard to aspects such as the technical requirement of anti-deception function, enforcements.Since " rules " are implemented; Common fuel charger cheatings such as " modification pulse equivalency ", " changing meter control mainboard ", " increase umber of pulse " have been stopped; Hit the illegal activities that utilize the fuel charger cheating, lead the consumer into a trap effectively, promoted the harmonious development of industry.
But the anti-cheating scheme of existing fuel charger also reckons without the cheating of display screen link, and the lawless person still can carry out video data and distort from showing link, shows that wrong oil-filling data is to implement the purpose of cheating thereby reach to the user.Still there is not effective solution at present.
The utility model content
The utility model embodiment provides a kind of display control chip, is used to improve safety of data, and realizes that chip is integrated.
A kind of display control chip may further comprise the steps: indicative control unit, encryption/decryption element and display driver unit; Indicative control unit is connected with encryption/decryption element, and encryption/decryption element is connected with the display driver unit;
Indicative control unit, being used for the data-switching from the mainboard of oiling machine beyond the display control chip is the data layout of encryption/decryption element needs, and sends to encryption/decryption element;
Encryption/decryption element is used for the enciphered data that the indicative control unit of receiving sends is deciphered, and sends to the display driver unit;
The display driver unit, being used for the data conversion after the deciphering is that liquid crystal driving signal sends to LCDs.
Increased encryption/decryption element among the utility model embodiment, be used for the enciphered data that need show is deciphered, to improve data security; Simultaneously authentication information is carried out encryption.Because mainboard of oiling machine is a serially-transmitted data; And encryption/decryption element is the parallel processing data; In order to satisfy the rate requirement of encryption/decryption element; The utility model embodiment has designed indicative control unit, is used for the serial data of mainboard of oiling machine output is converted into the data layout of encryption/decryption element needs.And the utility model embodiment is integrated in indicative control unit, encryption/decryption element and display driver unit in the display control chip, has dwindled volume, has improved security.
Description of drawings
Fig. 1 is the basic block diagram of the utility model embodiment display control chip;
Fig. 2 is the detailed structure view of the utility model embodiment display control chip.
Embodiment
Increased encryption/decryption element among the utility model embodiment, be used for the enciphered data that need show is carried out decryption processing, the authentication information of encryption is provided simultaneously, to improve data security.Because mainboard of oiling machine is a serially-transmitted data; And encryption/decryption element is the parallel processing data; In order to satisfy the rate requirement of encryption/decryption element; The utility model example design indicative control unit, be used for the serial data of mainboard of oiling machine output is converted into the data layout of encryption/decryption element needs.And provide multistage (for example 80 sections) liquid crystal display all standard drive signals, and support simultaneously to connect with a plurality of display driver chips, providing more, the multistage liquid crystal display drives.The utility model embodiment is integrated in indicative control unit, encryption/decryption element and display driver unit in the display control chip, has dwindled volume, has improved security.
Referring to Fig. 1, display control chip 100 comprises indicative control unit 101, encryption/decryption element 102 and display driver unit 103 in the present embodiment.
Indicative control unit 101 is connected 102 with encryption/decryption element, and encryption/decryption element 102 is connected 103 with the display driver unit.Indicative control unit 101 also is connected with the outside mainboard of oiling machine 104 of display control chip 100, especially with mainboard of oiling machine in monitoring microprocessor be connected.Display driver unit 103 also is connected with display control chip 100 outside display screens 105.Preferable, this display screen can be a LCDs.
It is the discernible data of encryption/decryption element that indicative control unit 101 is used for the data-switching from the mainboard of oiling machine beyond the display control chip, and sends to encryption/decryption element 102.Encryption/decryption element 102 is used for the encryption video data of receiving is carried out decryption processing, and sends to display driver unit 103.Send to indicative control unit Unit 101 after simultaneously authentication information being encrypted, convert enciphered data to serial data through indicative control unit Unit 101 and send to the fuel charger monitoring microprocessor.Display driver unit 103 is used for becoming the drive signal of liquid crystal display needs to send to display screen the data-switching after the deciphering of receiving, for demonstration.
Display control chip and display location are in same veneer in the present embodiment.This veneer and mainboard of oiling machine are two veneers, thus when two veneers connect in order to guarantee security, need carry out authentication.So indicative control unit 101 also is used for the authentication request of receiving from mainboard of oiling machine is sent to encryption/decryption element 102, and receive the authentication information that encryption/decryption element 102 returns.Encryption/decryption element 102 also is used to receive the authentication request that indicative control unit 101 sends, and carries out authentication after the deciphering, and sends to indicative control unit 101 after the authentication information encryption with chip.
Connect through pin between indicative control unit 101, encryption/decryption element 102 and the display driver unit 103, the structure in the face of display control chip 100 describes in detail down.
Referring to shown in Figure 2, display control chip 100 comprises chip operating voltage end VCC, ground voltage terminal VSS, liquid crystal drive positive voltage VDD, negative voltage VEE.
Indicative control unit 101 connects through SPI (serial peripheral interface, Serial Peripheral Interface) interface with mainboard of oiling machine, and the SPI interface comprises clock pin SPICLK, input pin MOSI and output pin MISO.For the ease of producers display control chip 100 is tested, indicative control unit 101 comprises test input pin TEST0 and test output pin TEST1.In order to control the liquid crystal upset, indicative control unit 101 also provides the common port com port.In order to realize that a monitoring microprocessor controls the demonstration of a plurality of display screens, indicative control unit 101 also provides two address pin in the present embodiment, realizes multihead display through different addresses are set.Indicative control unit 101 comprises two address pin A1 and A2 in the present embodiment.
Indicative control unit 101 and encryption/decryption element 102 through data bus (like 8 bit data bus D [0:7]), write pin WR, read pin RD, latch control pin LE and be connected.
Encryption/decryption element 102 is connected with clock pin CLK through sequential pin LK, serial data line Data, logical shift control pin SHL with display driver unit 103.Preferable, sequential pin LK comprises than displacement sequential pin LK1 and data latching sequential pin LK2.
In order to guarantee the clock synchronization of indicative control unit 101 and encryption/decryption element 102, display control chip 100 also comprises: reset unit RST and clock unit CLK.Indicative control unit 101 all is connected with clock unit with reset unit with encryption/decryption element 102.
Display driver unit 103 comprises liquid crystal drive reference voltage pin, for example comprises four reference voltage pin V1, V2, V3 and V4.Four reference voltages that these four reference voltage pins provide are used to control liquid crystal display.The display driver unit 103 also section of comprising drives pin, so that liquid crystal section drive signal to be provided, is used for controlling the demonstration of LCDs each point (or section), for example comprises altogether that 80 sections drive pin Seg1～Seg80.Display driver unit 103 also with display control chip 100 in switch unit SW be connected, switch unit SW receives signal M, cooperates the upset of controlling liquid crystal with com port.Display driver unit 103 also comprises serial data output pin Dout.When the more a plurality of display segment of display control chip 100 control, the end on display driver unit 103 drives pin and possibly be not enough to control more multistage liquid crystal display, therefore needs the display driver chip (general lcd drive chip) of a plurality of series connection.Data output pin Dout is used for sending data to next display driver chip.
Mainboard of oiling machine passes through clock pin SPICLK to indicative control unit 101 tranmitting data register signals, and is synchronous with the data transmission that guarantees mainboard of oiling machine and indicative control unit 101.When mainboard of oiling machine and display control chip 100 connected, mainboard of oiling machine sent enciphered data and authentication request through pin MOSI to indicative control unit 101; Indicative control unit 101 receives the authentication information after encrypting through MISO.Indicative control unit 101 sends write signal through pin WR to encryption/decryption element 102, sends enciphered data and authentication request through data bus D [0:7] to encryption/decryption element 102 simultaneously.Encryption/decryption element 102 carries out data decryption and authentication processing, and with issuing indicative control unit 101 after the authentication information encryption.Indicative control unit 101 sends read signal through reading pin RD to encryption/decryption element 102, and encryption/decryption element 102 passes through the identification authentication data that data bus D [0:7] sends after encrypting to indicative control unit 101 after receiving read signal.Indicative control unit 101 sends to mainboard of oiling machine through pin MISO with authentication information.Indicative control unit 101 need reset when powering on, and this process is controlled by reset unit RST.Indicative control unit 101 is controlled by clock unit CLK with the clock synchronization and the encryption and decryption clock of encryption/decryption element 102 transmission signals.
After connecting, mainboard of oiling machine sends data for demonstration through pin MOSI to indicative control unit 101.Indicative control unit 101 is through pin MOSI serial received data, and the row format of going forward side by side is changed.Then, indicative control unit 101 sends write signal through pin WR to encryption/decryption element 102, and passes through data bus D [0:7] with the data of parallel mode after encryption/decryption element 102 sends conversion.Indicative control unit 101 is whenever write data and is sent an effective latch signal through latching pin LE; For example effectively latch signal is " 0 "; With the register in the locking encryption/decryption element 102, the data of being convenient in 102 pairs of registers of encryption/decryption element are carried out decryption processing.Indicative control unit 101 latchs control pin LE journey high-impedance state when the transmission data, promptly send invalid latch signal " 1 ".Afterwards, the data after encryption/decryption element 102 will be deciphered through data pin Data send to display driver unit 103 with serial mode.Encryption/decryption element 102 passes through pin CLK to display driver unit 103 tranmitting data register signals simultaneously; With the assurance transmitting synchronous, and pass through pin LK1 and send the displacement clock signals to display driver unit 103, the data of a bit of every transmission are sent a bit-level clock signal; Send to display driver unit 103 through pin LK2 and to latch clock signal; Complete video data of every transmission sends one and latchs clock signal, and video data length can be pre-configured, and for example 64 or 128 compare top grade.Encryption/decryption element 102 also need send the logical shift control signal to display driver unit 103 through pin SHL, to represent transmission low data or first transmitting high bit data earlier.For example, section drives the corresponding high position data of Seg1 among pin Seg1～Seg80, the corresponding low data of Seg80, and pin SHL sends high level signal and representes first transmitting high bit data, and then display driver unit 103 corresponds to Seg1～Seg80 in proper order with the data of receiving.Display driver unit 103 is through the demonstration of Seg1～Seg80 control display screen.Indicative control unit 101 confirms through pin A1 and A2 control display screen address whether the data on the spi bus are this screen data.
When display control chip 100 is not connected with mainboard of oiling machine; Producers possibly test display control chip 100; Then import data to indicative control unit 101, and obtain the data of indicative control unit 101 outputs through pin TEST1 through pin TEST0.
Present embodiment is in order to improve safety of data, and encryption/decryption element 102 adopts the data fingerprint technology, when video data is destroyed or distorts, can carry out the data integrity state recognition.For example, mainboard of oiling machine transmits the enciphered data that has finger print information to display control chip 100, after encryption/decryption element 102 is received enciphered data; Carry out decryption processing; Finger print information to obtaining is compared, if inconsistent, then specified data is revised; Can return alert command etc. to mainboard of oiling machine, simultaneously warning on liquid crystal display; If consistent, then specified data safety sends to display driver unit 103 for demonstration with video data.
Increased encryption/decryption element among the utility model embodiment, be used for need data presented and authentication information are carried out the encryption and decryption processing, to improve data security.The employing standard of communicating by letter with mainboard of oiling machine SPI universal serial bus, serial data and conversion are accomplished by indicative control unit.And the utility model embodiment is integrated in indicative control unit, encryption/decryption element and display driver unit in the display control chip, has dwindled volume, has improved security.The utility model embodiment also provides the authentication process so that security to be provided.
Those skilled in the art should understand that the embodiment of the utility model can be provided as method, system or computer program.Therefore, the utility model can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the utility model can be employed in the form that one or more computer-usable storage medium (including but not limited to magnetic disk memory and optical memory etc.) that wherein include computer usable program code go up the computer program of implementing.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technologies thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.

Claims (14)

1. a display control chip is characterized in that, comprising: indicative control unit, encryption/decryption element and display driver unit; Indicative control unit is connected with encryption/decryption element, and encryption/decryption element is connected with the display driver unit;
Indicative control unit, being used for the data-switching from the mainboard of oiling machine beyond the display control chip is the data layout of encryption/decryption element needs, and sends to encryption/decryption element;
Encryption/decryption element is used for the enciphered data that the indicative control unit of receiving sends is deciphered, and sends to the display driver unit;
The display driver unit, being used for the data conversion after the deciphering is that liquid crystal driving signal sends to LCDs.
2. display control chip as claimed in claim 1 is characterized in that, the data-switching that indicative control unit is used for that also encryption/decryption element is sent is that serial data sends to mainboard of oiling machine.
3. display control chip as claimed in claim 1 is characterized in that, encryption/decryption element is used for that also authentication information is encrypted the back and issues mainboard of oiling machine through indicative control unit.
4. display control chip as claimed in claim 1 is characterized in that the display driver unit comprises the pin that is used to provide all standard drive signals of multistage liquid crystal display.
5. display control chip as claimed in claim 1 is characterized in that, indicative control unit is connected through writing the WR pin with encryption/decryption element, and connects through reading the RD pin.
6. display control chip as claimed in claim 1 is characterized in that indicative control unit is connected through data bus with encryption/decryption element, and this data bus is used for indicative control unit and encryption/decryption element carries out exchanges data;
Encryption/decryption element is connected through serial data line Data with the display driver unit.
7. display control chip as claimed in claim 1 is characterized in that, indicative control unit is connected through latching control LE pin with encryption/decryption element.
8. display control chip as claimed in claim 1 is characterized in that, also comprises: reset unit be used to control the clock synchronized unit;
Indicative control unit all is connected with clock unit with reset unit with encryption/decryption element.
9. display control chip as claimed in claim 1 is characterized in that, encryption/decryption element is connected through sequential control LK pin with the display driver unit.
10. display control chip as claimed in claim 9 is characterized in that, sequential control LK pin comprises data shift sequential pin (LK1) and data latching sequential pin (LK2).
11. display control chip as claimed in claim 1 is characterized in that, encryption/decryption element is connected through direction of displacement control SHL pin with the display driver unit.
12. display control chip as claimed in claim 1 is characterized in that, encryption/decryption element is connected through being used to control the clock synchronized pin with the display driver unit.
13. display control chip as claimed in claim 1 is characterized in that, display control chip is connected with the display driver chip of a plurality of series connection.
14. display control chip as claimed in claim 1 is characterized in that, display control chip is connected through standard serial peripheral interface SPI with mainboard of oiling machine.
CN2011203228825U 2011-08-31 2011-08-31 Display and control chip Withdrawn - After Issue CN202205437U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011203228825U CN202205437U (en) 2011-08-31 2011-08-31 Display and control chip

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Application Number Priority Date Filing Date Title
CN2011203228825U CN202205437U (en) 2011-08-31 2011-08-31 Display and control chip

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CN2011203228825U Withdrawn - After Issue CN202205437U (en) 2011-08-31 2011-08-31 Display and control chip

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102411892A (en) * 2011-08-31 2012-04-11 北京拓盛电子科技有限公司 Display control chip

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102411892A (en) * 2011-08-31 2012-04-11 北京拓盛电子科技有限公司 Display control chip

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GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20120425

Effective date of abandoning: 20130918

RGAV Abandon patent right to avoid regrant