CN201163519Y - Digital electric transducer and display control device - Google Patents
Digital electric transducer and display control device Download PDFInfo
- Publication number
- CN201163519Y CN201163519Y CNU200820001209XU CN200820001209U CN201163519Y CN 201163519 Y CN201163519 Y CN 201163519Y CN U200820001209X U CNU200820001209X U CN U200820001209XU CN 200820001209 U CN200820001209 U CN 200820001209U CN 201163519 Y CN201163519 Y CN 201163519Y
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- digital converter
- display
- control
- signal
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Abstract
The utility model provides a digital current changer and a display control device used for controlling an optical property of a display. The digital current changer comprises a comparison table or an equation, the comparison table stores a plurality of preset control parameters and a plurality of preset optical parameters respectively corresponding to the preset control parameters. In addition, the digital current changer can inquire the comparison table and find out a matched preset control parameter as a current control parameter according to an input signal; moreover, the preset optical parameter corresponding to the current control parameter is used as a current optical parameter. According to the current optical parameter, the digital current changer can also produce an optical regulation and control signal and controls the optical property of the display by the optical regulation and control signal.
Description
Technical field
The utility model relates to a kind of digital converter and display control apparatus.
Background technology
In recent years, flourish along with various electronic products, commercial multimedia systems with family expenses are all universal day by day.In most multimedia system, most important hardware just belongs in order to present the display device of image.Therefore, the subject under discussion always paid much attention to of the quality that how to promote display device for its deviser.
Please refer to Fig. 1, Fig. 1 shows the functional block diagram of a typical display system 7.This display system 7 comprises an analog transverter (inverter) 70, analog controlling unit 71, a driver (driver) 72, a transformer (transformer) 74, and a display unit 76.Control module 71 is an analog IC.Transverter 70 can provide a controlling signal to driver 72, and driver 72 is then adjusted a power supply according to this controlling signal, and driver 72 can select to use full-bridge circuit, half-bridge circuit, Push-Pull circuit or Royal circuit according to design requirement.Controlling signal is generally the PWM signal.Transformer 74 can receive the power supply through adjusting, and after being boosted power supply is offered the luminescence unit 76A in the display unit 76 again.In actual applications, luminescence unit 76A can comprise cathode fluorescent tube (Cold cathodefluorescent lamp, CCFL) or light emitting diode (Light emitting diode, LED) module.
In addition, the character of the controlling signal that analog controlling unit 71 is provided as voltage swing, size of current, frequency, duration, amplitude etc., can be carried out conversion according to multiple parameter, to adjust the optical property of display unit 76, as brightness, renewal frequency etc.In addition, the character of the controlling signal that aforementioned analog transverter 70 is provided also can according to display unit 76 with and luminescence unit 76A operating voltage/electric current of being fed back (feedback) carry out conversion, to adjust the optical property of display unit 76.
Yet, because known converters uses analog control module to carry out computing, therefore need the huge passive device of collocation quantity, as resistance, electric capacity etc., to adjust controlling signal.When the optical property of display unit 76 falls short of specifications when requiring, need carry out the fine setting of passive device (resistance or electric capacity) with manual type, the man-hour of manufacturing and cost are risen.
The utility model content
Therefore, a category of the present utility model provides a kind of digital converter, to control the optical property of a display.Especially, the usage quantity that can save passive device according to digital converter of the present utility model reaches the effect identical with known converters, effectively reduces the complexity of design and the man-hour and the cost of manufacturing.
Digital converter according to a preferred embodiment of the present utility model comprises comparison list, and it stores a plurality of default optical parametric of a plurality of preset control parameters and the corresponding described preset control parameters of difference.In addition, this digital converter can be inquired about this table of comparisons according to an input signal and find out the preset control parameters of coupling as an existing controlled variable, will be to default optical parametric that should existing controlled variable as an existing optical parametric, produce optics regulation and control signal according to this existing optical parametric, and control the optical property of this display by this optics regulation and control signal.
Digital converter according to another preferred embodiment of the present utility model comprises a digital control unit, and it has an equation.And especially, this equational controlled variable that is input as, this equational existing optical parametric that is output as, this digital control unit produces optics regulation and control signal according to this existing optical parametric, and controls the optical property of this display by this optics regulation and control signal.
Another category of the present utility model provides a kind of display control apparatus, is used to control the optical property of a display.
Display control apparatus according to a preferred embodiment of the present utility model comprises digital converter.This digital converter comprises comparison list, stores a plurality of default optical parametric of a plurality of preset control parameters and the corresponding described preset control parameters of difference.Especially, this digital converter can be inquired about this table of comparisons according to an input signal and find out the preset control parameters of coupling as an existing controlled variable, will be to default optical parametric that should existing controlled variable as an existing optical parametric, and produce optics regulation and control signal according to this existing optical parametric, and control the optical property of this display by this optics regulation and control signal.
Display control apparatus according to another preferred embodiment of the present utility model comprises digital converter, and it has a digital control unit, and this digital control unit comprises an equation.Especially, this digital control unit produces a controlled variable according to an input signal, this formula one root produces an existing optical parametric according to this controlled variable, this digital control unit produces optics regulation and control signal according to this existing optical parametric, and controls the optical property of this display by this optics regulation and control signal.
Can be further understood by utility model detailed description and the accompanying drawing of following embodiment about advantage of the present utility model and spirit this.
Description of drawings
Fig. 1 shows the functional block diagram of the display system in the known technology.
Fig. 2 shows the functional block diagram according to the digital converter of a specific embodiment of the present utility model.
Fig. 3 A shows the table of comparisons synoptic diagram according to a specific embodiment of the present utility model.
Fig. 3 B shows the table of comparisons synoptic diagram according to a specific embodiment of the present utility model.
Fig. 4 shows the functional block diagram according to the display control apparatus of a specific embodiment of the present utility model.
Fig. 5 A shows the process flow diagram according to the display control method of a specific embodiment of the present utility model.
Fig. 5 B shows the process flow diagram according to the display control method of a specific embodiment of the present utility model.
The reference numeral explanation
1,30: digital converter 10,302: the table of comparisons
11,301: digital control unit 12,304: analog/digital converter
3: display control apparatus 32,72: driver
34,74: transformer 36: power supply
40: backlight module 402,76A: luminescence unit
7: display system 71: analog controlling unit
70: transverter 76: display unit
S50-S58: process step
Embodiment
The utility model provides a kind of digital converter, display control apparatus and method, in order to control the optical property of a display.In actual applications, this display can be that (liquidcrystal display, LCD), and it comprises backlight module to LCD.In addition, this backlight module can comprise cathode fluorescent tube (Cold cathode fluorescent lamp, CCFL) or light emitting diode (Light emitting diode LED) waits luminescence unit.In actual applications, the optical property of in check display can comprise, but is not subject to, as luminescence unit brightness, luminescence unit electric current, luminescence unit voltage or holding circuit voltage etc.
Please refer to Fig. 2, it shows the functional block diagram according to the digital converter of a specific embodiment of the present utility model.As shown in Figure 2, digital converter 1 of the present utility model comprises comparison list (lookup table) 10, one equation 13 and an analog/digital converter (A/D converter) 12.The table of comparisons 10 can store a plurality of default optical parametric of a plurality of preset control parameters and the corresponding described preset control parameters of difference.Equation 13 can be selected linear relation for example y=ax, nonlinear relation, differential relationship or integral relation according to demand for use.12 of analog/digital converters can receive simulation controlling signal (for example, simulation light modulation signal), and will simulate controlling signal and be converted to input signal.As shown in Figure 2, input signal can comprise, but is not subject to, as simulation controlling signal, digital control signal or feedback signal.In addition, optics regulation and control signal is generally the PWM signal.
In addition, digital converter 1 can be inquired about preset control parameters that this table of comparisons 10 finds out coupling as an existing controlled variable according to input signal (foregoing digital control signal), and will be to default optical parametric that should existing controlled variable as an existing optical parametric.Then, digital converter 1 produces optics regulation and control signal according to this existing optical parametric, and controls the optical property of display by this optics regulation and control signal.Note that digital converter 1 of the present utility model can directly receive digital control signal, also can receive the simulation controlling signal as input signal by analog/digital converter 12.In addition, digital converter 1 also can be adjusted the optics controlling signal according to equation 13.Equation 13 be input as input signal, output is then regulated and control signals for optics.
In actual applications, default optical parametric can be, but is not subject to, as work frequency (dutycycle) parameter, luminance parameter, frequency parameter, amplitude parameter, time parameter, or other suitable parameter.For example, work frequency parameter can comprise parameters such as high-frequency work frequency parameter and/or low frequency operation frequency parameter; Frequency parameter can comprise parameters such as high frequency frequency parameter and/or low frequency frequency parameter; And time parameter can comprise the duration of certain particular job frequency or reach parameters such as certain needed time of certain luminance.
Further please refer to Fig. 3 A, it shows the table of comparisons synoptic diagram according to a specific embodiment of the present utility model.As shown in Figure 3A, these table of comparisons 10 stored a plurality of preset control parameters are brightness number percent, and default optical parametric then is actual output brightness (nit).For example, the brightness number percent parameter that input signal comprised that receives when digital converter 1 is 20%, but then the table of comparisons 10 of digital converter 1 query graph 3A is found out corresponding optical parametric for exporting brightness 500nit.At this moment, digital converter 1 just can produce the optics regulation and control signal of representing this optical parametric.
Further please refer to Fig. 3 B, it shows the table of comparisons synoptic diagram according to a specific embodiment of the present utility model.Shown in Fig. 3 B, these table of comparisons 10 stored a plurality of preset control parameters are brightness number percent, and default optical parametric then is a low frequency operation frequency parameter.Please note, the table of comparisons 10 contents stored owing to digital converter of the present utility model can obtain according to suitable calculation procedure or thumb rule, therefore there is not absolute mathematical relation (for example, equal difference, geometric ratio) between the parameter values of each field.In other words, the designer can insert the parameter values of any needs in the table of comparisons 10, and therefore, the parameter value of described low frequency operation frequency field can be any suitable numerical value.
As shown in Figure 2, in actual applications, digital converter of the present utility model can be by being connected with computing machine as interface such as RS232, USB or other suitable interface, and the designer can import any controlled variable of wanting to test to digital control unit 11 by computing machine.
Please refer to Fig. 4, it shows the functional block diagram according to the display control apparatus of a specific embodiment of the present utility model.As shown in Figure 4, display control apparatus 3 of the present utility model comprises digital converter 30, driver 32, transformer 34.Digital converter 30 can comprise aforesaid digital control unit 301, the table of comparisons 302, equation 303 and analog/digital converter 304, to carry out foregoing function, because the function of the table of comparisons 302 and equation 303 and effect are identical with previous description, therefore here repeat no more.
In addition, input signal can comprise simulation controlling signal, digital control signal, feedback signal or protection signal.The table of comparisons 302 be input as input signal, output is then regulated and control signals for optics.Equation 303 be input as input signal, output is then regulated and control signals for optics.In addition, can select to use the table of comparisons 302 or equation 303 to adjust optics regulation and control signal according to demand.In addition, feedback signal can be lamp tube current value or magnitude of voltage.In addition, when backlight module 40 inside were short-circuited or open a way, the protection signal that digital control unit 301 is received can be greater than or less than a threshold value Vt who is stored in the table of comparisons, and this moment, digital control unit 301 can stop to export optics regulation and control signal.
Because the difference of material and technology, the value of the protection signal of the produced digital converter of each piece (voltage or electric current) has some differences, and traditional mode is to use manually removes to weld magnitude of voltage or the current value that resistance or electric capacity change the protection signal.The utility model then can be directly adjusted the error that the value that is stored in the Vt in the table of comparisons is produced with the modifying factor process variations by interface (USB or RS232).
In addition, driver 32 connects digital converter 30 and power supply 36, in order to receiving the optics regulation and control signal from digital converter 30, and adjusts this power supply 36 according to this optics regulation and control signal and becomes the control power supply.In actual applications, driver 32 can be adjusted characteristics such as the voltage, electric current, frequency of power supply 36, or other suitable characteristic.
34 in transformer connects the backlight module 40 of driver 32 and display respectively, and this backlight module 40 comprises at least one luminescence unit 402.Transformer 34 can receive the control power supply that driver 32 is adjusted, and driven for emitting lights unit 402 is luminous after being boosted.
In this specific embodiment, digital converter 30 also can be according to adjust optics regulation and control signal from the feedback signal of transformer 34 or backlight module 40.In actual applications, feedback signal can comprise, but is not subject to, as the magnitude of current or the voltage of luminescence unit brightness, luminescence unit.
Note that in actual applications display control apparatus of the present utility model can be integrated in the backlight module of display, perhaps integrate, or separately exist in the display with other element of display.
In addition, digital converter of the present utility model or display control apparatus also can be before dispatching from the factory earlier with the backlight module of display, and adjust the table of comparisons content of digital converter, to reach optimized effect according to aforesaid feedback signal.
Please refer to Fig. 5 A, it shows the process flow diagram according to the display control method of a specific embodiment of the present utility model.Shown in Fig. 5 A, display control method of the present utility model can comprise the following step:
At first, at step S50, set up comparison list, it stores a plurality of default optical parametric (for example actual output brightness of Fig. 3 A) of foregoing a plurality of preset control parameters (for example brightness number percent of Fig. 3 A) and the corresponding described preset control parameters of difference.Then; at step S52; according to an input signal; for example simulate controlling signal, digital control signal, feedback signal or protection signal and inquire about preset control parameters that this table of comparisons finds out coupling as an existing controlled variable, and will be to default optical parametric that should existing controlled variable as an existing optical parametric.At last,, produce optics regulation and control signal, and control the optical property of this display by this optics regulation and control signal according to this existing optical parametric at step S54.The content that note that the table of comparisons 302 in step S50 is identical with previous description, therefore here repeats no more.In addition, the simulation controlling signal can convert corresponding digital signal by the simulation controlling signal that analog/digital converter will be imported to.
Refer again to Fig. 5 B, it shows the process flow diagram according to the display control method of another specific embodiment of the present utility model.Shown in Fig. 5 B, display control method of the present utility model also can comprise step S55, set up an equation at digital control unit, then, at step S56, digital control unit parses a controlled variable with input signal, then, at step S57, this equational this controlled variable that is input as, this equational output then is an existing optical parametric, then, at step S58, produce optics regulation and control signal according to this existing optical parametric, and control the optical property of this display by this optics regulation and control signal.For example, in the time will allowing output form a linear relationship, can use a linear equation with input, y=ax for example, wherein x is a controlled variable, y is existing optical parametric.
In sum,, have the design flexibility of height, can adjust the table of comparisons or equational content according to different demands according to digital converter of the present utility model compared to known technology, and can be by carrying out the increase and decrease or the modification of parameter with computer interconnection.In addition, the usage quantity that can save passive device according to digital converter of the present utility model, display control apparatus and method reaches the effect identical with known converters, effectively reduces the complexity of design and the man-hour and the cost of manufacturing.
By the detailed description of above specific embodiment, hope can be known description feature of the present utility model and spirit more, and is not to come category of the present utility model is limited with above-mentioned disclosed specific embodiment.On the contrary, its objective is that hope can contain in the scope that is arranged in claim of the present utility model of various changes and tool equality.
Claims (26)
1. digital converter is used to control the optical property of a display, it is characterized in that this digital converter comprises:
One digital control unit has comparison list, stores a plurality of default optical parametric of a plurality of preset control parameters and the corresponding described preset control parameters of difference;
Wherein this digital converter can be inquired about this table of comparisons according to an input signal and find out the preset control parameters of coupling as an existing controlled variable, will be to default optical parametric that should existing controlled variable as an existing optical parametric, and produce optics regulation and control signal according to this existing optical parametric, and control the optical property of this display by this optics regulation and control signal.
2. digital converter as claimed in claim 1 is characterized in that, further comprises:
One analog/digital converter in order to receiving a simulation controlling signal, and should be simulated controlling signal and was converted to this input signal.
3. digital converter as claimed in claim 1, it is characterized in that wherein said default optical parametric comprises the one at least that is selected from the group that is made up of a work frequency parameter, a luminance parameter, a frequency parameter, an amplitude parameter and a time parameter.
4. digital converter as claimed in claim 3 is characterized in that, wherein this frequency parameter comprises a high frequency frequency parameter and/or a low frequency frequency parameter.
5. digital converter as claimed in claim 3 is characterized in that, wherein this work frequency parameter comprises a high-frequency work frequency parameter and/or a low frequency operation frequency parameter.
6. digital converter as claimed in claim 1 is characterized in that, wherein this digital converter can produce this input signal according to a feedback signal.
7. digital converter as claimed in claim 6 is characterized in that, wherein this feedback signal is produced by a transformer or a backlight module.
8. digital converter as claimed in claim 6 is characterized in that, wherein this feedback signal comprises the one at least that is selected from the group that is made up of a luminescence unit brightness, a luminescence unit magnitude of current and a holding circuit voltage.
9. display control apparatus is used to control the optical property of a display, it is characterized in that this display control apparatus comprises:
One digital converter has a digital control unit, and this digital control unit comprises comparison list, stores a plurality of default optical parametric of a plurality of preset control parameters and the corresponding described preset control parameters of difference;
Wherein this digital converter can be inquired about this table of comparisons according to an input signal and find out the preset control parameters of coupling as an existing controlled variable, will be to default optical parametric that should existing controlled variable as an existing optical parametric, and produce optics regulation and control signal according to this existing optical parametric, and control the optical property of this display by this optics regulation and control signal.
10. display control apparatus as claimed in claim 9 is characterized in that, wherein this digital converter further comprises:
One analog/digital converter in order to receiving a simulation controlling signal, and should be simulated controlling signal and was converted to this input signal.
11. display control apparatus as claimed in claim 9 is characterized in that, further comprises:
One driver connects this digital converter and a power supply, in order to receiving this optics regulation and control signal, and adjusts this power supply according to this optics regulation and control signal and becomes a control power supply.
12. display control apparatus as claimed in claim 11 is characterized in that, further comprises:
One transformer, at least one luminescence unit that connects this driver and this display respectively and comprised, this transformer is in order to boost the output of driver.
13. display control apparatus as claimed in claim 9, it is characterized in that wherein said default optical parametric comprises the one at least that is selected from the group that is made up of a work frequency parameter, a luminance parameter, a frequency parameter, an amplitude parameter and a time parameter.
14. display control apparatus as claimed in claim 13 is characterized in that, wherein this frequency parameter comprises a high frequency frequency parameter and/or a low frequency frequency parameter.
15. display control apparatus as claimed in claim 13 is characterized in that, wherein this work frequency parameter comprises a high-frequency work frequency parameter and/or low frequency operation frequency ginseng.
16. display control apparatus as claimed in claim 9 is characterized in that, wherein this digital converter can produce this optics regulation and control signal according to a feedback signal.
17. display control apparatus as claimed in claim 16 is characterized in that, wherein this feedback signal comprises current value or the magnitude of voltage that is selected from by a luminescence unit brightness or a luminescence unit.
18.. a digital converter is used to control the optical property of a display, it is characterized in that this digital converter comprises:
One digital control unit has an equation;
This equational controlled variable that is input as wherein, this equational existing optical parametric that is output as, this digital control unit produces optics regulation and control signal according to this existing optical parametric, and regulates and control the optical property that signal is controlled this display by this optics.
19. digital converter as claimed in claim 18 is characterized in that, further comprises:
One analog/digital converter in order to receiving a simulation controlling signal, and should be simulated controlling signal and was converted to this input signal.
20.. a display control apparatus is used to control the optical property of a display, it is characterized in that this display control apparatus comprises:
One digital converter has a digital control unit, and this digital control unit comprises an equation;
Wherein this digital control unit produces a controlled variable according to an input signal, this formula one root produces an existing optical parametric according to this controlled variable, this digital control unit produces optics regulation and control signal according to this existing optical parametric, and controls the optical property of this display by this optics regulation and control signal.
21. display control apparatus as claimed in claim 20 is characterized in that, wherein this digital converter further comprises:
One analog/digital converter in order to receiving a simulation controlling signal, and should be simulated controlling signal and was converted to this input signal.
22. display control apparatus as claimed in claim 20 is characterized in that, further comprises:
One driver connects this digital converter and a power supply, in order to receiving this optics regulation and control signal, and adjusts this power supply according to this optics regulation and control signal and becomes a control power supply.
23. display control apparatus as claimed in claim 22 is characterized in that, further comprises:
One transformer, at least one luminescence unit that connects this driver and this display respectively and comprised, this transformer is in order to boost the output of driver.
24. display control apparatus as claimed in claim 20, it is characterized in that wherein said existing optical parametric comprises the one at least that is selected from the group that is made up of a work frequency parameter, a luminance parameter, a frequency parameter, an amplitude parameter and a time parameter.
25. display control apparatus as claimed in claim 20 is characterized in that, wherein this frequency parameter comprises a high frequency frequency parameter and/or a low frequency frequency parameter.
26. display control apparatus as claimed in claim 20 is characterized in that, wherein this work frequency parameter comprises a high-frequency work frequency parameter and/or a low frequency operation frequency parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820001209XU CN201163519Y (en) | 2008-01-09 | 2008-01-09 | Digital electric transducer and display control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820001209XU CN201163519Y (en) | 2008-01-09 | 2008-01-09 | Digital electric transducer and display control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201163519Y true CN201163519Y (en) | 2008-12-10 |
Family
ID=40184449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820001209XU Expired - Fee Related CN201163519Y (en) | 2008-01-09 | 2008-01-09 | Digital electric transducer and display control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201163519Y (en) |
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2008
- 2008-01-09 CN CNU200820001209XU patent/CN201163519Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081210 Termination date: 20130109 |