CN207218880U

CN207218880U - A kind of driving chip, more lens drive systems and more camera lens camera modules

Info

Publication number: CN207218880U
Application number: CN201721334226.0U
Authority: CN
Inventors: 黄长发; 李建华
Original assignee: Truly Opto Electronics Ltd
Current assignee: Truly Opto Electronics Ltd
Priority date: 2017-10-17
Filing date: 2017-10-17
Publication date: 2018-04-10
Anticipated expiration: 2027-10-17

Abstract

The utility model discloses a kind of driving chip, more lens drive systems and more camera lens camera modules.The driving chip is used to drive multiple focusing components simultaneously, including I2C bus groups unit, multiple D/A conversion units and multiple simulation output units, the output end of the I2C bus groups unit is respectively electrically connected to the input of all D/A conversion units, the output end of one D/A conversion unit is correspondingly electrically connected to the input of a simulation output unit, and the output end of a simulation output unit is correspondingly electrically connected to a focusing component.The driving chip can drive multiple focusing components, can reduce the number of fitting parts of more camera lens camera modules and reduce the volume of more camera lens camera modules.

Description

A kind of driving chip, more lens drive systems and more camera lens camera modules

Technical field

Field of photography is the utility model is related to, more particularly to a kind of driving chip, more lens drive systems and more camera lenses are taken the photograph As module.

Background technology

With the development of camera technique, it is double take the photograph module use it is more and more extensive, and later it is possible that three Take the photograph module, four take the photograph the camera module of the even more more camera lenses of module, when in use, each camera lens needs the camera module of these types Individually focusing component control is used to carry out focusing and stabilization etc., and a driving chip need to be separately configured in component of each focusing To be driven, cause that the accessory of whole camera module is excessive, volume is excessive.

Utility model content

In order to solve above-mentioned the deficiencies in the prior art, the utility model provides a kind of driving chip, more lens drive systems And poly-lens camera module.The driving chip can drive multiple focusing components, can reduce the number of fitting parts of more camera lens camera modules With the volume for reducing more camera lens camera modules.

Technical problem to be solved in the utility model is achieved by the following technical programs：

A kind of driving chip, for driving multiple focusing components, including I2C bus groups unit, multiple digital-to-analogue conversions simultaneously Unit and multiple simulation output units, the output end of the I2C bus groups unit are respectively electrically connected to all D/A conversion units Input, the output end of a D/A conversion unit is correspondingly electrically connected to the input of a simulation output unit, a mould The output end for intending output unit is correspondingly electrically connected to a focusing component.

Further, each simulation output unit includes comparator, metal-oxide-semiconductor and resistance, and the positive pole of the comparator is defeated Enter end and be electrically connected to the output end of corresponding D/A conversion unit, after the drain electrode electricity of negative input and the metal-oxide-semiconductor connects The input of the resistance is together electrically connected to, output end is electrically connected to the grid of the metal-oxide-semiconductor；The source electrode of the metal-oxide-semiconductor point Electricity is not connected to power port and analog current output port, and the output end electricity of the resistance is connected to grounding ports.

Further, the D/A conversion unit is 10 digit weighted-voltage D/A converters.

Further, also electrically connected between the output end of each D/A conversion unit and corresponding simulation output unit There is reference voltage unit.

Further, the output end of the reference voltage unit is being electrically connected to the comparator of the simulation output unit just Pole input.

Further, it is also integrated with power on reset unit.

A kind of more lens drive systems, including main control module, above-mentioned driving chip and multiple focusing components, the master control Module is electrically connected to the input of the driving chip, the output end electrical connection of a simulation output unit in the driving chip To a focusing component.

A kind of more camera lens camera modules, including above-mentioned more lens drive systems and multiple camera lenses, a camera lens are arranged on In one focusing component.

The utility model has the advantages that：Multiple D/A conversion units and multiple moulds are integrated with the driving chip Intend output unit, and different D/A conversion units is switched over using an I2C bus groups unit, and simulated accordingly Analog current corresponding to output, when specifically used, can write in the register of the different focusing component in rear end on output unit Enter corresponding address, different D/A conversion units is controlled to identify by corresponding address, multiple focus groups are driven to realize The purpose of part, the number of fitting parts of more camera lens camera modules can be reduced and reduce the volume of more camera lens camera modules.

Brief description of the drawings

Fig. 1 is the circuit theory diagrams of driving chip provided by the utility model；

Fig. 2 is the remote block diagram of more lens drive systems provided by the utility model.

Embodiment

The utility model is described in detail with reference to the accompanying drawings and examples.

Embodiment one

As shown in figure 1, a kind of driving chip, for driving multiple focusing components simultaneously, including it is I2C bus groups unit 1, more Individual D/A conversion unit 2 and multiple simulation output units 3, the output end of the I2C bus groups unit 1 are respectively electrically connected to own The input of D/A conversion unit 2, the output end of a D/A conversion unit 2 are correspondingly electrically connected to a simulation output unit 3 Input, the output end of a simulation output unit 3 is correspondingly electrically connected to a focusing component.

The driving chip has multiple I/O ports, including a VDD, an XSD, a SDA, a SCL and multiple IOUT and multiple VSS, wherein, VDD is power port, and XSD is standby port, and SDA and SCL are the I2C bus groups unit 1 FPDP, IOUT and VSS are the analog current output port and grounding ports of the simulation output unit 3, and a simulation is electric Stream output port electricity connects one focusing component of control, and each simulation output unit 3 configures an IOUT and VSS.

Multiple D/A conversion units 2 and multiple simulation output units 3 are integrated with the driving chip, and use an I2C Bus group unit 1 switches over to different D/A conversion units 2, and on corresponding simulation output unit 3 corresponding to output Analog current, when specifically used, can in the register of the different focusing component in rear end address corresponding to write-in, pass through correspondingly Address control different D/A conversion unit 2 to identify, to realize the purpose of the multiple focusing components of driving, more camera lenses can be reduced The number of fitting parts of camera module and the volume for reducing more camera lens camera modules.

It is defeated that each simulation output unit 3 includes comparator 31, metal-oxide-semiconductor 32 and resistance Rs, the positive pole of the comparator 31 Enter the output end that end is electrically connected to corresponding D/A conversion unit 2, the drain electrode electricity of negative input and the metal-oxide-semiconductor 32 connects It is latter to be electrically connected to the grid of the metal-oxide-semiconductor 32 with the input for being electrically connected to the resistance, output end；The metal-oxide-semiconductor 32 Electricity is connected to power port and analog current output port to source electrode respectively, and the output end electricity of the resistance Rs is connected to grounding ports.

The D/A conversion unit 2 is 10 digit weighted-voltage D/A converters.

Reference is also electrically connected between the output end of each D/A conversion unit 2 and corresponding simulation output unit 3 Voltage cell 4, the output end of the reference voltage unit 4 are electrically connected to the positive pole of the comparator 31 of the simulation output unit 3 Input.

The reference voltage unit 4 is used to provide reference voltage for the comparator 31, prevents by temperature drift or other electricity The influence of gas difference, and cause the primary simulation electric current of output to be likely to occur difference, the comparator 31 obtains the digital-to-analogue and turned After changing the analog voltage of the output of unit 2, with reference to reference voltage, the size of the analog voltage that needs export is drawn to compensate this part Difference.

The driving chip is also integrated with power on reset unit 5, for doing homing action in power up, ensures system shape State is under acquiescence controllable state.

Embodiment two

As shown in Fig. 2 a kind of more lens drive systems, including driving chip described in main control module, embodiment one and Multiple focusing components, the main control module are electrically connected to the input of the driving chip, are simulated for one in the driving chip The output end of output unit 3 is electrically connected to a focusing component.

Embodiment three

A kind of more camera lens camera modules, including more lens drive systems described in embodiment two and multiple camera lenses, one Camera lens is arranged in a focusing component.

Embodiment described above only expresses embodiment of the present utility model, and its description is more specific and detailed, but simultaneously Therefore the limitation to the utility model patent scope can not be interpreted as, as long as using equivalent substitution or the form of equivalent transformation institute The technical scheme of acquisition, it all should fall within the scope of protection of the utility model.

Claims

A kind of 1. driving chip, for driving multiple focusing components simultaneously, it is characterised in that：Including I2C bus groups unit, multiple D/A conversion unit and multiple simulation output units, the output end of the I2C bus groups unit are respectively electrically connected to all digital-to-analogues The input of converting unit, the output end of a D/A conversion unit are correspondingly electrically connected to the input of a simulation output unit End, the output end of a simulation output unit are correspondingly electrically connected to a focusing component.
2. driving chip according to claim 1, it is characterised in that：Each simulation output unit includes comparator, MOS Pipe and resistance, the electrode input end of the comparator are electrically connected to the output end of corresponding D/A conversion unit, and negative pole is defeated The drain electrode electricity for entering end and the metal-oxide-semiconductor connects the latter same input for being electrically connected to the resistance, and output end is electrically connected to the MOS The grid of pipe；Electricity is connected to power port and analog current output port, the output end of the resistance to the source electrode of the metal-oxide-semiconductor respectively Electricity is connected to grounding ports.
3. driving chip according to claim 1 or 2, it is characterised in that：The D/A conversion unit is 10 digit moulds Converter.
4. driving chip according to claim 1 or 2, it is characterised in that：The output end of each D/A conversion unit and with Reference voltage unit is also electrically connected between its corresponding simulation output unit.
5. driving chip according to claim 4, it is characterised in that：The output end of the reference voltage unit is electrically connected to The electrode input end of the comparator of the simulation output unit.
6. driving chip according to claim 1 or 2, it is characterised in that：It is also integrated with power on reset unit.
A kind of 7. more lens drive systems, it is characterised in that：Including any described driving in main control module, claim 1-6 Chip and multiple focusing components, the main control module are electrically connected to the input of the driving chip, one in the driving chip The output end of individual simulation output unit is electrically connected to a focusing component.
A kind of 8. more camera lens camera modules, it is characterised in that：Including more lens drive systems described in claim 7 and multiple mirrors Head, a camera lens are arranged in a focusing component.