CN105528998B - Bias light drive module and electronic equipment - Google Patents
Bias light drive module and electronic equipment Download PDFInfo
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- CN105528998B CN105528998B CN201410510438.4A CN201410510438A CN105528998B CN 105528998 B CN105528998 B CN 105528998B CN 201410510438 A CN201410510438 A CN 201410510438A CN 105528998 B CN105528998 B CN 105528998B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The present invention provides a kind of bias light drive module and electronic equipment.The electronic equipment includes: bias light drive module, is configured to drive to background light source；First control module configures to generate control information, and is sent to the bias light drive module.The bias light drive module includes: receiving unit, is configured to receive the control information；Second control unit configures to be based on the control information, controls the action parameter when bias light drive module is acted.
Description
Technical field
The present invention relates to bias light drive module and electronic equipments.
Background technique
In the electronic equipment of mobile phone, tablet computer, laptop, digital camera, laptop etc., have
For showing the display screen of graphic user interface.In such as LCD display, screen itself does not shine, for example, by by LED
The background light source of composition emits bias light, to clearly illustrate graphic user interface.Also, pass through bias light drive module pair
Background light source is driven.
In the bias light drive module of bias light driving chip etc., in the voltage conversion unit of boosting unit etc.
There are the switch elements of metal-oxide-semiconductor etc..In the state that background light source is in heavy duty (high brightness), conduction loss is big, work frequency
The more high then efficiency of rate is higher.Conversely, switching loss is big in the state that background light source is in light load (low-light level), work frequency
The more low then efficiency of rate is higher.Therefore, in bias light drive module, changed according to the load of background light source, switch switch element
Working frequency so that bias light drive module is maintained at high efficiency.
In addition, in the bias light drive module of bias light driving chip etc., the energy when carrying out current control output
Good efficiency is accessed, but is easy to produce colour cast at background light source electric current especially small (low-light level).Conversely, carry out
When PWM is exported, although will not generate colour cast in low-light level, its efficiency is exported lower than current control.Therefore, in bias light
In drive module, changed according to the load of background light source, switches the way of output of bias light drive module, so that can either eliminate
Colour cast in low-light level is also able to maintain high efficiency.
But in existing bias light drive module, can not adjust the working frequency of such as switch element switching point,
The switching point exported with PWM output and current control, therefore work frequency can not be suitably adjusted according to specific application scenarios
The switching point of rate and the switching point of the way of output, thus the efficiency of bias light drive module cannot keep in good state or
Person causes the output mode of bias light drive module that may be not suitable for specific application scenarios.
Summary of the invention
The present invention completes in view of the above problems, it is intended that providing a kind of bias light drive module and comprising the back
The electronic equipment of scape optical drive module can suitably control bias light drive module according to specific application scenarios and be moved
Action parameter when making, so that bias light drive module is maintained at good state.
According to an aspect of the present invention, a kind of bias light drive module is provided.The bias light drive module includes: to connect
Unit is received, is configured to receive control information；Control unit configures to be based on the control information, controls the background optical drive
Action parameter when module is acted.
According to another aspect of the present invention, a kind of electronic equipment is provided.The electronic equipment includes bias light drive module,
Configuration is to drive background light source；First control module configures to generate control information, and is sent to the background CD-ROM drive
Dynamic model block.Wherein, the bias light drive module includes: receiving unit, is configured to receive the control information；Second control is single
Member configures to be based on the control information, controls the action parameter when bias light drive module is acted.
Bias light drive module according to the present invention and electronic equipment can suitably be controlled according to specific application scenarios
Action parameter when bias light drive module processed is acted, so that bias light drive module is maintained at good state.
Detailed description of the invention
Fig. 1 is to illustrate the functional block diagram of bias light drive module in the prior art.
Fig. 2 is the functional block diagram for indicating the electronic equipment including bias light drive module of embodiments of the present invention.
Specific embodiment
In the following, illustrating a specific embodiment of the invention referring to attached drawing.Description referring to the drawings is provided, with
Help the understanding to example embodiment of the invention as defined by appended claims and their equivalents.It includes helping to understand
Various details, but they can only be counted as illustratively.It therefore, it would be recognized by those skilled in the art that can be to here
The embodiment of description makes various changes and modifications, without departing from scope and spirit of the present invention.Moreover, in order to make specification
It is more clear succinct, by omission pair it is well known that the detailed description of function and construction.
Firstly, illustrating bias light drive module in the prior art referring to Fig.1.Fig. 1 is to illustrate the background of the prior art
The functional block diagram of optical drive module.
Bias light drive module 1 shown in FIG. 1 includes voltage conversion unit 11, current output unit 12, detection unit 13
With control unit 14.Specifically, bias light drive module 1 is by bias light driving chip and peripheral cell (inductance, capacitor etc.) structure
At.
Voltage conversion unit 11 boosts to the input voltage from battery etc., to pass through the output voltage after boosting
Background light source is driven.Switch element in voltage conversion unit 11 including metal-oxide-semiconductor etc., the switch element can be with more
One of frequency in a frequency carries out switch motion.Current output unit 12 is with the first output mode or the second output mode
Background light source is driven.Specifically, current output unit 12 is for example with current control output mode or PWM (pulse width
Modulation) output mode drives background light source.Detection unit 13 detects the electric current of background light source, and the electric current that will test out
Value is sent to control unit 14.One end of background light source is connected to voltage conversion unit 11, and it is single that the other end is connected to electric current output
Member 12, to receive the driving of bias light drive module 1.
Control unit 14 is controlled according to the luminance information of the outside from bias light drive module 1 by voltage conversion unit
11 and current output unit 12 background light source is driven driving current (such as control output voltage values, output current value,
Duty ratio when PWM is exported) so that background light source is with brightness emission bias light represented by luminance information.
On the other hand, control unit 14 controls bias light drive module according to the current value detected by detection unit 13
Action parameter when being acted.For example, control unit 14 switches voltage and turns according to the current value detected by detection unit 13
The switch element changed in unit 11 carries out frequency when switch motion.For another example, control unit 14 is detected according to by detection unit 13
Current value out, the output mode of switching electric current output unit 12.
Specifically, when the current value detected by detection unit 13 is more than or equal to threshold value, control unit 14 turns voltage
The frequency error factor that the switch element changed in unit 11 carries out switch motion is relatively high frequency, conversely, by detection unit 13
When the current value detected is less than threshold value, control unit 14 converts the voltage into the switch element in unit 11 and carries out switch motion
Frequency error factor is relatively low frequency.Bias light drive module is maintained at high efficiency as a result,.Wherein it is possible to be arranged more
Threshold value, thus a frequency being switched suitably to according to the current value detected in more frequencies.
Specifically, when the current value detected by detection unit 13 is more than or equal to threshold value, control unit 14 is defeated by electric current
The output mode of unit 12 is switched to current control output mode out, to guarantee higher efficiency.Conversely, by detection unit
When 13 current values detected are less than threshold value, the output mode of current output unit 12 is switched to PWM and exported by control unit 14
Mode, to overcome the colour cast problem when background light source is in low-load.
Wherein, what the current value that the content and basis that control unit 14 is controlled according to luminance information detect was controlled
Content is different.The content that control unit 14 is controlled according to luminance information, it is related with the driving current of background light source, therefore to electricity
Duty ratio the etc. when output voltage values of pressure converting unit 11 and current output unit 12, output current value, PWM output is controlled
System.In other words, control unit 14 controls the driving current of background light source according to luminance information, therefore final control
Object processed is the brightness of background light source.But what control unit 14 was controlled according to the current value detected by detection unit 13
Content, related with the action parameter of bias light drive module 1, thus, it is possible to improve the performance of bias light drive module (to increase effect
Rate overcomes the problems, such as colour cast).In other words, control unit 14 is according to the current value detected come in bias light drive module
Action parameter controlled.
As described above, in the bias light drive module 1 of the prior art, about the action parameter of bias light drive module 1,
Autonomous control (that is, being controlled according to the electric current of itself detection) is carried out by control unit 14.Constituting background optical drive mould
In the bias light driving chip of block 1, the autonomous control logic of the action parameter about bias light drive module 1 has been fixed.By
This can not adjust the work of such as switch element in the bias light drive module 1 of the prior art according to specific application scenarios
The action parameter of the switching point (threshold value) that the switching point (threshold value) and PWM of working frequency export and current control exports etc..Wherein,
According to specific application scenarios, the output of the optimal value and PWM of the switching point of the working frequency of switch element as described above and
The optimal value variation of the switching point of current control output, but in action parameter about bias light drive module 1 from master control
Logic processed in fixed situation, can not dynamically and flexibly change above-mentioned switching point.As a result, in specific application scenarios
In, above-mentioned switching point may not be set in optimal value.
The bias light drive module of embodiments of the present invention includes: receiving unit, is configured to receive control information；Control
Unit configures to be based on the control information, controls the action parameter when bias light drive module is acted.In addition,
The electronic equipment of embodiments of the present invention includes configuration to generate control information and be sent to the control of bias light drive module
Molding block and configuration are come the bias light drive module that is driven to background light source.Thereby, it is possible to according to specific applied field
Scape suitably controls action parameter when bias light drive module is acted, being capable of dynamically and flexibly alternation switch element
Working frequency switching point and PWM output and current control output switching point etc., so that bias light drive module be kept
In good state.
In the following, illustrating the bias light drive module of embodiments of the present invention referring to Fig. 2 and including the background CD-ROM drive
The electronic equipment of dynamic model block.
Fig. 2 is the functional block diagram for indicating the electronic equipment including bias light drive module of embodiments of the present invention.
As shown in Fig. 2, electronic equipment includes control module 2, bias light drive module 1A and background light source.
Control module 2 configures to generate control information, and is sent to bias light drive module 1A.The control information is in background
It is used to control the action parameter when bias light drive module is acted in optical drive module 1A.
Wherein it is possible to arbitrarily generate the content of control information as needed.For example, control information indicates to open for switching
The frequency that element carries out switch motion is closed, the output mode of current output unit can also be indicated, however, not limited to this, can root
According to needing arbitrarily to generate.
Bias light drive module 1A configures to drive to background light source.As shown in Fig. 2, bias light drive module 1A packet
Include voltage conversion unit 11, current output unit 12, control unit 14A and receiving unit 15.
Wherein, the bias light of the function of voltage conversion unit 11 and current output unit 12 and the prior art shown in FIG. 1
Drive module 1 is identical.For example, voltage conversion unit 11 boosts to the input voltage from battery etc., to pass through boosting
Output voltage afterwards drives background light source.Switch element in voltage conversion unit 11 including metal-oxide-semiconductor etc., the switch
Element can carry out switch motion with one of frequency in multiple frequencies.Current output unit 12 with the first output mode or
Second output mode drives background light source.For example, current output unit 12 is for example with current control output mode or PWM
(pulse width modulation) output mode drives background light source.One end of background light source is connected to voltage conversion unit 11,
The other end is connected to current output unit 12, to receive the driving of bias light drive module 1A.
Receiving unit 15 receives the control information sent from control module 2.For example, in receiving unit 15 and control module
The control information can be sent between 2 by I2C bus, but not limited to this, can also send in other way
The control information.
Control unit 14A is controlled bias light drive module 1A and is carried out based on the control information received by receiving unit 15
Action parameter when movement.
Specifically, the switch element for including in voltage conversion unit 11 is indicated in the control information that control module 2 generates
When frequency, control unit 14A is based on the control information, and switching switch element carries out the frequency of switch motion.
For example, generating control information for the setting information of background light source based on user in control module 2.For example,
Control module 2 obtains the setting information of the brightness for background light source, and control letter appropriate is generated according to the setting information
Breath.In the case where setting height for the brightness of background light source, it is believed that the electric current of background light source is big, therefore in order to improve back
The efficiency of scape optical drive module 1A generates the control information for indicating relatively high frequency.Conversely, being set by the brightness of background light source
Be set to it is low in the case where, it is believed that the electric current of background light source is small, therefore in order to improve the efficiency of bias light drive module 1A, raw
At the control information for indicating relatively low frequency.
In control unit 14A, the control letter of the frequency based on the switch element for indicating to include in voltage conversion unit 11
The frequency error factor that switch element carries out switch motion is frequency corresponding with control information by breath.Thereby, it is possible to according to user's
Setting information, the suitably frequency of configuration switch element, so that the efficiency of bias light drive module 1A is maintained at high state.
For example, control unit 14A cuts the frequency of switch element in the case where controlling information is to indicate " 1 " of relatively high frequency
It is changed to 1000KHz, in the case where controlling information is to indicate " 0 " of relatively low frequency, is by the frequency error factor of switch element
500KHz.In addition, switch element can also switch between the frequency greater than two in bias light drive module 1A.If such as
This, the bit number for controlling information should also be as correspondingly increasing, to determine frequency corresponding with information is controlled.
Specifically, in the control information generated by control module 2, each with multiple frequencies correspondingly indicates electric current
Range.For example, control information indicates table as shown in Table 1.
Table 1
| Current value | Frequency |
| 0~5mA | 500KHz |
| 5~10mA | 1MHz |
| 10~20mA | 1.2MHz |
It can also include that configuration (is being schemed to detect the detection unit of the electric current of background light source in bias light drive module 1A
It is not shown in 2).It is received and the control information of each range for correspondingly indicating electric current of multiple frequencies in receiving unit 15
In the case of, control unit 14A obtains corresponding with the range that the electric current of the background light source detected by detection unit is fallen into the
One frequency, and be the first frequency by the frequency error factor that switch element carries out switch motion.For example, being detected by detection unit
When the current value of the background light source arrived is 7mA, the frequency error factor that switch element carries out switch motion is by control unit 14A
1MHz.Wherein, the number of the frequency of above table, the range of current value are only example, can be according to bias light drive module
The concrete application scene of 1A, dynamically and flexibly sets, to improve the efficiency of bias light drive module 1A.
Due to background light source be in electric current it is big in the state of, conduction loss is big, and the more high then efficiency of working frequency is higher.Instead
It, background light source be in electric current it is small in the state of, switching loss is big, and the more low then efficiency of working frequency is higher.Therefore, it is controlling
In table represented by information, with the raising of frequency, the current value in the range of corresponding electric current increases, thus will back
The efficiency of scape optical drive module 1A is maintained at high state.
In the control information generated by control module 2 with each range for correspondingly indicating electric current of multiple frequencies
In the case of, control unit 14A same as the prior artly, according to the current value detected by detection unit 13, controls bias light
Action parameter when drive module is acted.But in embodiments of the present invention, it can dynamically set and multiple frequencies
The range of each corresponding electric current of rate, therefore can be according to specific application scenarios, by the switching of the frequency of switch element
Point is set as optimal value.In contrast, can only be set based on static state when leaving the factory in the bias light drive module of the prior art
The range of fixed electric current corresponding with each frequency switches the frequency of switch element, therefore there are the switching points of institute's static settings
It is not suitable for the situation of specific application scenarios.
As described above, control unit 14A is received externally according to by receiving unit 15 in bias light drive module 1A
Control information switch frequency when switch element carries out switch motion, therefore can according to specific application scenarios dynamic and
The switching point of the frequency of switch element is flexibly set, so that the efficiency of bias light drive module 1A is maintained at high state.
Specifically, when the control information that control module 2 generates indicates the output mode of current output unit 12, control is single
First 14A is based on the control information, the output mode of switching electric current output unit 12.
For example, generating control information for the setting information of background light source based on user in control module 2.For example,
Control module 2 obtains the setting information of the brightness for background light source, and control letter appropriate is generated according to the setting information
Breath.In the case where setting height for the brightness of background light source, it is believed that the electric current of background light source is big, therefore in order to improve back
The efficiency of scape optical drive module 1A generates the control information for indicating current control output mode.Conversely, by the bright of background light source
In the case that degree is set as low, it is believed that the electric current of background light source is small, therefore in order to prevent in current control output mode
Colour cast problem generates the control information for indicating PWM output mode.
In control unit 14A, based on the control information for the output mode for indicating current output unit 12, electric current is exported
The output mode of unit 12 switches over.Thereby, it is possible to the setting information according to user, suitably setting electric current output unit 12
Output mode, so that the efficiency of bias light drive module 1A is maintained at high state, and current control can be prevented defeated
Colour cast problem under mode out.For example, control unit 14A is to indicate the feelings of the first information of PWM output mode in control information
Under condition, the output mode of current output unit 12 is switched to PWM output mode, is to indicate current control output in control information
In the case where second information of mode, the output mode of current output unit 12 is switched to current control output mode.
In addition, can also include configuring to detect the detection unit of the electric current of background light source in bias light drive module 1A
(not shown in Fig. 2).The control information generated by control module 2 may be to indicate the autonomous control of current output mode
Third information.In the case where receiving the control information for indicating third information by receiving unit 15, control unit 14A can also be with
The current value and threshold value for comparing the background light source that detection unit (being not shown in Fig. 2) detects are greater than in the current value detected
The output mode of current output unit 12 is switched to current control output mode when equal to threshold value, it is small in the current value detected
The output mode of current output unit 12 is switched to PWM output mode when threshold value.
As described above, control unit 14A is received externally according to by receiving unit 15 in bias light drive module 1A
Control information carry out the output mode of switching electric current output unit 12, therefore can according to specific application scenarios dynamic and flexibly
Ground sets the switching point of output mode, so that the efficiency of bias light drive module 1A is maintained at high state, and overcomes
Colour cast problem under current control output mode.
In addition, register can be set also in bias light drive module 1A to store the control received by receiving unit 15
Information processed, control unit 14A is according to the control information stored in a register come control action parameter.
In the above description, with the output mode of the frequency of control unit 14A control switch element, current output unit 12
For be illustrated, but the present invention is not limited thereto, such as control unit 14A is according to the control sent from control module 2
The frequency of information control switch element processed and the both sides of output mode, furthermore control unit 14A also can control other movements
Parameter.
The bias light drive module 1A and electronic equipment of embodiment according to the present invention, can be according to specific applied field
Scape suitably controls action parameter (dynamically and flexibly alternation switch element when bias light drive module 1A is acted
The switching point of the output of switching point and PWM and the current control output of working frequency), so that bias light drive module is maintained at good
Good state.
Those of ordinary skill in the art may be aware that being incorporated in each unit and mould of embodiments of the present invention description
Block can be realized with electronic hardware, computer software, or a combination of the two.And software module can be placed in arbitrary form
Computer storage medium in.In order to clearly illustrate the interchangeability of hardware and software, in the above description according to function
Each exemplary composition and step can be generally described.These functions are implemented in hardware or software actually, are depended on
In the specific application and design constraint of technical solution.Those skilled in the art can use not each specific application
Described function is realized with method, but such implementation should not be considered as beyond the scope of the present invention.
The embodiment of the present invention has been described in detail above.However, it should be appreciated by those skilled in the art that not departing from this
In the case where the principle and spirit of invention, these embodiments can be carry out various modifications, combination or sub-portfolio, and such
Modification should be fallen within the scope of the present invention.
Claims (14)
1. a kind of bias light drive module, comprising:
Receiving unit configures to receive control information；
Control unit configures the movement ginseng controlled when the bias light drive module is acted to be based on the control information
Number；
Current output unit configures to be driven with the first output mode or the second output mode to background light source,
It wherein controls the action parameter when bias light drive module is acted and includes at least and switch the electric current output list
The output mode of member.
2. bias light drive module as described in claim 1, comprising:
Voltage conversion unit comprising switch element, and configure to convert input voltage into output voltage, wherein described open
It closes element and switch motion is carried out with one of frequency in multiple frequencies,
And controlling the action parameter when bias light drive module is acted further includes switching the switch element to carry out
The frequency of switch motion.
3. bias light drive module as claimed in claim 2, wherein
The frequency error factor that the switch element carries out switch motion is frequency corresponding with the control information by described control unit
Rate.
4. bias light drive module as claimed in claim 2, comprising:
Detection unit configures to detect the electric current of background light source,
It is described control information in multiple frequencies it is each correspondingly indicate electric current range,
Described control unit obtains corresponding with the range that the electric current of background light source detected by the detection unit is fallen into
First frequency, and be the first frequency by the frequency error factor that the switch element carries out switch motion.
5. bias light drive module as claimed in claim 4, wherein
In the control information, with the raising of frequency, the value in the range of corresponding electric current increases.
6. bias light drive module as described in claim 1, wherein
Described control unit is in the case where the control information is the first information, by the output mode of the current output unit
It is switched to the first output mode, in the case where the control information is the second information, by the output of the current output unit
Pattern switching is the second output mode.
7. bias light drive module as described in claim 1, comprising:
Detection unit configures to detect the electric current of background light source,
In the case where the control information is third information, described control unit judges back detected by the detection unit
The electric current of scape light source, it is defeated when the electric current is more than or equal to threshold value the output mode of the current output unit to be switched to second
The output mode of the current output unit is switched to the first output mould when the electric current is less than the threshold value by mode out
Formula.
8. a kind of electronic equipment, comprising:
Bias light drive module configures to drive to background light source；
First control module configures to generate control information, and is sent to the bias light drive module,
The bias light drive module includes:
Receiving unit configures to receive the control information；
Second control unit configures to be based on the control information, controls dynamic when the bias light drive module is acted
Make parameter；
Current output unit configures to be driven with the first output mode or the second output mode to the background light source,
It wherein controls the action parameter when bias light drive module is acted and includes at least and switch the electric current output list
The output mode of member.
9. electronic equipment as claimed in claim 8, wherein
The bias light drive module includes:
Voltage conversion unit comprising switch element, and configure to convert input voltage into output voltage, wherein described open
It closes element and switch motion is carried out with one of frequency in multiple frequencies,
And controlling the action parameter when bias light drive module is acted further includes switching the switch element to carry out
The frequency of switch motion.
10. electronic equipment as claimed in claim 9, wherein
First control module generates the control information based on the setting information for being directed to the background light source,
The frequency error factor that the switch element carries out switch motion is corresponding with the control information by second control unit
Frequency.
11. electronic equipment as claimed in claim 9, wherein
The control information of the first control module generation and each range for correspondingly indicating electric current of multiple frequencies,
The bias light drive module further include:
Detection unit configures to detect the electric current of background light source,
Second control unit obtains the range pair fallen into the electric current of background light source detected by the detection unit
The first frequency answered, and be the first frequency by the frequency error factor that the switch element carries out switch motion.
12. electronic equipment as claimed in claim 11, wherein
In the control information generated by first control module, with the raising of frequency, corresponding electric current
Value in range increases.
13. electronic equipment as claimed in claim 8, wherein
First control module generates the control information based on the setting information for being directed to the background light source,
Second control unit is in the case where the control information is the first information, by the output of the current output unit
Pattern switching is the first output mode, in the case where the control information is the second information, by the current output unit
Output mode is switched to the second output mode.
14. electronic equipment as claimed in claim 8, wherein
The bias light drive module further include:
Detection unit configures to detect the electric current of background light source,
In the case where the control information is third information, second control unit judges to be detected by the detection unit
Background light source electric current, the output mode of the current output unit is switched to the when the electric current is more than or equal to threshold value
The output mode of the current output unit is switched to the first output when the electric current is less than the threshold value by two output modes
Mode.
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| US11138934B2 (en) * | 2019-07-30 | 2021-10-05 | Innolux Corporation | Display device |
| JP2022543719A (en) * | 2020-08-27 | 2022-10-14 | ナンジン エンウェル テクノロジー サービス カンパニー リミテッド | Backlight device control system and terminal for head-mounted equipment |
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| TW200904254A (en) * | 2007-07-11 | 2009-01-16 | Ind Tech Res Inst | Light source apparatus and driving apparatus thereof |
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