CN101783118B - Novel LCD (Liquid Crystal Display) double energy-saving control module - Google Patents
Novel LCD (Liquid Crystal Display) double energy-saving control module Download PDFInfo
- Publication number
- CN101783118B CN101783118B CN2009101050685A CN200910105068A CN101783118B CN 101783118 B CN101783118 B CN 101783118B CN 2009101050685 A CN2009101050685 A CN 2009101050685A CN 200910105068 A CN200910105068 A CN 200910105068A CN 101783118 B CN101783118 B CN 101783118B
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal
- lvds
- control module
- triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention relates to a novel LCD (Liquid Crystal Display) double energy-saving control module, which comprises an LVDS (Low Voltage Differential Signaling) signal distribution circuit, a signal converting circuit, a signal processing circuit, a PWM (Pulse Width Modulation) pulse generation circuit and an ambient light self-adaptive circuit, wherein the LVDS (Low Voltage Differential Signaling) signal distribution circuit is connected with an LVDS signal output port; the signal converting circuit and the LVDS signal distribution circuit are connected for converting an LVDS signal into a simulation video signal; the signal processing circuit and the signal converting circuit are connected for converting the simulation video signal into direct current voltage change; the PWM (Pulse Width Modulation) pulse generation circuit and the signal processing circuit are connected for generating a PWM control signal according to the direct current voltage change; and the output of the ambient light self-adaptive circuit and the direct current voltage change are connected to the PWM (Pulse Width Modulation) pulse generation circuit through an adding circuit. The novel LCD double energy-saving control module is adaptive to LCDs with any signal source and any size, is applicable for LED (Light Emitting Diode) light sources or CCFL (Cold Cathode Fluorescent Light) light sources, and has the characteristics of good compatibility and universality, convenient organization and batch production as well as energy saving and reformation, simple structure and low cost.
Description
Technical field
The present invention relates to LCD, more particularly, relate to a kind of Novel LCD (Liquid Crystal Display) double energy-saving control module.
Background technology
In LCD (LCD) product, backlightly come display image as light source by CCFL (CCFL) or LED (light emitting diode).In product in the past, brightness backlight is a steady state value, i.e. secretly bright regardless of image or surround lighting is under the state that always works in maximum power dissipation backlight.Along with market share and the screen size of LCD are increasing, cause the power consumption of LCD also big more and more more, particularly in the high bright product that outdoor environment is used, its power consumption of high bright LCD more than 42 cun can reach more than the 800W.Moreover, follow the increase of power consumption also can cause increasing the appearance of heat radiation cost and the problems such as serviceable life of difficulty and shortening LCD.The appearance of dynamic backlight technology has not only solved high bright LCD well in power consumption, heat radiation, the existing problem in life-spans etc. three aspect and image display effect is significantly improved.
According to statistics, the mean flow rate of color video frequency image is merely 20%-40%.Therefore, if brightness backlight is changed with color image content, the energy-saving effect in the time of just making LCD work easily reaches the obvious energy saving effect of 30%-50%.Therefore, in today that the environmental protection and energy saving cry grows to even greater heights, the dynamic backlight technology becomes numerous research institutions and big LCD manufacturer drops into manpower one after another and financial resources are developed and the hot spot technology of application is just not at all surprising.
In LCD in the past, the brightness of image is the input signal amplitude of screen to be regulated through manual work according to the personal like, and the mode of this adjusting brightness does not change power consumption backlight in fact.In the LCD that has, (this mode is used less) of carrying out brightness regulation through manual change's backlight power consumption arranged also; Also have and use from the angle of eyeshield that photosensitive device regulates screen intensity.The ambient light adaptive technology of our indication is to be that purpose is passed through photosensitive device perception surround lighting and then changed the technology that power consumption backlight realizes brightness regulation with energy-conserving and environment-protective now.This technology can make the screen intensity that is under the varying environment illumination condition be in the best all the time, thereby not only reaches eyeshield but also can effectively reach purpose of energy saving.Yet present LCD control Driver Circuit structure is relative complex all, and compatibility and versatility neither be fine, is not easy to tissue and produces in batches and realize existing all kinds of LCD are carried out reducing energy consumption.
The various dynamic backlight technology of all releases at present are the corresponding a kind of screen of a kind of Dynamic control module basically.When the structural change of lamp plate, control module also will change thereupon.And need adopt the hardware and the software support of different editions to different LCD, it is bigger therefore to apply difficulty.Also just because of this, make up to the present that the product of the dynamic backlight of real mass marketed still is very few, and is particularly unpopular especially for the dynamic backlight product of high cls.
Summary of the invention
The technical matters that the present invention will solve is; Bad to the above-mentioned LCD control module compatibility of prior art and versatility, be not easy to organize batch process and reducing energy consumption, complex structure to cause the higher defective of cost, a kind of Novel LCD (Liquid Crystal Display) double energy-saving control module is provided.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of Novel LCD (Liquid Crystal Display) double energy-saving control module; It comprises the LVDS signal distribution circuit that is connected with the LVDS signal output port, be connected with said LVDS signal distribution circuit and be used for the LVDS conversion of signals is become the signaling conversion circuit of analog video signal, is connected with said signaling conversion circuit and is used for analog video signal is converted into the signal processing circuit of dc voltage change, is connected the pwm pulse generative circuit and the ambient light adaptive circuit that are used for generating according to dc voltage change pwm control signal with said signal processing circuit, and the output of wherein said ambient light adaptive circuit and dc voltage change are connected to said pwm pulse generative circuit through an adding circuit.
In Novel LCD (Liquid Crystal Display) double energy-saving control module of the present invention, said LVDS signal distribution circuit adopts the mode of bridge joint that the LVDS signal is divided into two-way, and one the road is connected to said signaling conversion circuit, and another road is connected to the central control circuit of liquid crystal panel.
In Novel LCD (Liquid Crystal Display) double energy-saving control module of the present invention, said signaling conversion circuit comprises being connected with said LVDS signal distribution circuit and is used for the LVDS conversion of signals is first change-over circuit of digital rgb signal, is connected with said first change-over circuit and is used for the digital rgb conversion of signals is second change-over circuit of analog rgb signal and is connected with said second change-over circuit and is used for the analog rgb signal is encoded to form the RGB coding circuit of analog video signal.
In Novel LCD (Liquid Crystal Display) double energy-saving control module of the present invention, said signal processing circuit comprises and is connected the luminance signal amplifying circuit that is used for analog video signal is amplified with said signaling conversion circuit, is connected with said luminance signal amplifying circuit and is used for analog video signal converted into the DC restoration circuit of the dc voltage change that is proportional to the signal peak peak value and be connected with said DC restoration circuit being used for dc amplification circuit that dc voltage change is amplified.
In Novel LCD (Liquid Crystal Display) double energy-saving control module of the present invention, the output terminal of said pwm pulse generative circuit is connected to the PWM input end of light emitting diode or cold-cathode lamp tube drive circuit.
In Novel LCD (Liquid Crystal Display) double energy-saving control module of the present invention; Said first change-over circuit comprises with said LVDS signal distribution circuit and is connected the LVDS receiver that is used for the LVDS conversion of signals is become the digital rgb signal; Said second change-over circuit comprises the video dac that is connected with said first change-over circuit; Said RGB coding circuit comprises the triode Q1 that the resistance R 10, R11, R12 and the base stage that are connected on the said video dac output terminal and resistance R 10, R11, R12 are connected simultaneously; The collector of said triode Q1 connects the 5V power supply, and emitter is connected to said signal processing circuit.
In Novel LCD (Liquid Crystal Display) double energy-saving control module of the present invention; Said luminance signal amplifying circuit comprises the triode Q1 that is connected with said signaling conversion circuit; Said DC restoration circuit comprises the diode D1 that is connected with the collector of said triode Q1; Said dc amplification circuit comprises the triode Q3 that triode Q2 that base stage is connected with said diode D1 and base stage are connected with the collector of said triode Q2; The collector of wherein said triode Q1, Q2, Q3 is connected with the 5V power supply, and the emitter of said triode Q3 is connected with said pwm pulse generative circuit.
In Novel LCD (Liquid Crystal Display) double energy-saving control module of the present invention; Said pwm pulse generative circuit comprises the double operational PWM controller IC 7 that is connected with said signal processing circuit; Wherein first amplifier is formed square-wave oscillator; The output of this square-wave oscillator forms the normal phase input end that sawtooth wave is connected to second amplifier through the integrating circuit that resistance R 37, electric capacity R38 form; The dc voltage change that is proportional to the signal peak peak value that said signal processing circuit forms is connected to the inverting input of second amplifier, and the output terminal output of second amplifier is connected to the PWM input end of light emitting diode or cold-cathode lamp tube drive circuit corresponding to the pwm control signal of unlike signal voltage.
In Novel LCD (Liquid Crystal Display) double energy-saving control module of the present invention; Said ambient light adaptive circuit comprises the triode Q5 that photosensitive device RV, base stage are connected with said photosensitive device RV, and the dc voltage change that is proportional to the picture signal peak-to-peak value that the emitter of said triode Q5 and said signal processing circuit are produced is connected to said pwm pulse generative circuit after said adding circuit addition.
In Novel LCD (Liquid Crystal Display) double energy-saving control module of the present invention; Said adding circuit comprises resistance R 43, R44, the R45 that circulation connects; The emitter of wherein said triode Q5 is connected between resistance R 43, the R44; The dc voltage change that is proportional to the picture signal peak-to-peak value that said signal processing circuit produced is connected between resistance R 43, the R45, is the output terminal that is connected to said pwm pulse generative circuit between resistance R 44, the R45.
The Novel LCD (Liquid Crystal Display) double energy-saving control module of embodiment of the present invention has following beneficial effect:
1, compatibility and versatility are good: control module of the present invention adapts to any signal source, and no matter the LCD of virtually any size is the LCD of high definition, SD or other any resolution, is not only applicable to led light source and also is applicable to the CCFL light source simultaneously;
2, being convenient to tissue produces in batches and realizes existing all kinds of LCD are carried out reducing energy consumption: because energy-saving control module of the present invention has processing and installs easily; Therefore can carry out the batch process of energy-conservation LCD with original production technology and production line; Simultaneously to existing all kinds LCD; As long as have the PWM control interface in the backlight drive circuit, can both carry out reducing energy consumption to these LCD easily;
3, cost is low: can find out from circuit structure of the present invention and principle of work; This dual energy-saving control module is very simple and practical; Only be equivalent to 1/3 to 1/4 of other similar control module prices, the real purpose that realizes low input high yield (high energy-saving effect).
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the system chart of control module of the present invention;
Fig. 2 is the further system chart of control module of the present invention;
Fig. 3 is the schematic diagram of LVDS signal distribution circuit of the present invention, signaling conversion circuit;
Fig. 4 is the schematic diagram of signal processing circuit of the present invention, pwm pulse generative circuit, ambient light adaptive circuit.
Embodiment
In order to make technical matters to be solved by this invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, Novel LCD (Liquid Crystal Display) double energy-saving control module of the present invention has been shown among the figure.Shown control module comprises central control circuit 6, the adding circuit 7 of LVDS signal distribution circuit 1, signaling conversion circuit 2, signal processing circuit 3, pwm pulse generative circuit 4, ambient light adaptive control circuit 5, liquid crystal panel.Wherein, LVDS (Low Voltage Differential Signaling) is a kind of differential signal technology of the low amplitude of oscillation; PWM (Pulse Width Modulation; Pulse-length modulation) and LCD (LiquidCrystal Display, LCD), LED (Light Emitting Diode, light emitting diode) all be this area technical term commonly used.
LVDS signal distribution circuit 1 is connected with the LVDS signal output port, is used for the LVDS signal that obtains is transferred to respectively the T-CON plate (being central control circuit 6) of subsequent conditioning circuit and liquid crystal panel.In order to reach the purpose of dynamic control, the off-take point of LVDS signal is very crucial.Because the LVDS port is the unified delivery outlet of all signals of LCD, so it just becomes the unique sample of signal point of Dynamic control module.After sampling spot is confirmed; Next to solve the assignment problem of LVDS signal exactly; Do not adopt expensive LVDS divider in the present invention; But utilize the good driving force of LVDS signal and the characteristics of LVDS receiver high input impedance, and adopt simple bridging method just can the LVDS signal be divided into two-way, the central control circuit 6 of one road feed flow crystal panel is so that its normal display image signals; Then as the signal source of Dynamic control module, promptly the signal source as subsequent conditioning circuit at first transfers to signaling conversion circuit 2 on another road.
Signaling conversion circuit 2 is connected with LVDS signal distribution circuit 1, is used for the LVDS conversion of signals is become analog video signal.Certainly this process is not directly the LVDS conversion of signals to be become analog video signal; But the LVDS conversion of signals of at first image card being exported becomes the digital rgb signal; Again the digital rgb conversion of signals is become the analog rgb signal; Form analog video signal through a RGB coding circuit at last, please refer to description in detail below in conjunction with Fig. 2 and Fig. 3.
Pwm pulse generative circuit 4 is connected with signal processing circuit 3, is used for generating pwm control signal according to dc voltage change.With reference to circuit diagram shown in Figure 4; Pwm pulse generative circuit 4 comprises double operational PWM controller IC 7; Wherein the first amplifier component frequency is about the square-wave oscillator of 400Hz; The output of this square-wave oscillator forms the normal phase input end that sawtooth wave is connected to second amplifier through the integrating circuit that resistance R 37, electric capacity R38 form; The dc voltage change that is proportional to the signal peak peak value that signal processing circuit 3 forms is connected to the inverting input of second amplifier, and the output terminal output of second amplifier is connected to the PWM input end of light emitting diode or cold-cathode lamp tube drive circuit corresponding to the pwm control signal of unlike signal voltage.
5 outputs of ambient light adaptive circuit and dc voltage change are connected to pwm pulse generative circuit 4 through an adding circuit 7.Ambient light adaptive circuit 5 is provided with photosensitive device, and photosensitive device just can be exported different voltages with different with the different resistance value of environment different illumination conversion.The DC voltage of the peak-to-peak value that is proportional to picture signal that this voltage and above-mentioned signal processing circuit 2 are produced is after adding circuit 7 additions; Add to pwm pulse generative circuit 5, make and export the pwm control signal that can reflect dynamic image and different light environment at pulse generation circuit 5.
As shown in Figure 2, the further system chart of control module of the present invention has been shown among the figure, promptly further shown the inner structure of signaling conversion circuit 2 and signal processing circuit 3.As can be seen from the figure, signaling conversion circuit 2 comprises first change-over circuit 21 that is connected with LVDS signal distribution circuit 1, second change-over circuit 22 that is connected with first change-over circuit 21, the RGB coding circuit 23 that is connected with second change-over circuit 22.First change-over circuit 21 is the digital rgb signal with the LVDS conversion of signals, and second change-over circuit 22 is the analog rgb signal with the digital rgb conversion of signals, and 23 pairs of analog rgb signals of RGB coding circuit are encoded to form analog video signal.
Fig. 3 and Fig. 4 are the complete circuits of the dual energy-saving control module of LCD of the present invention.The off-take point of LVDS signal of the present invention is the LVDS signal output port, because the LVDS port is the unified delivery outlet of all signals of LCD, so it just becomes the unique sample of signal point of Dynamic control module.After sampling spot is confirmed; Next to solve the assignment problem of LVDS signal exactly; Do not adopt expensive LVDS divider in the present invention; But utilize the good driving force of LVDS signal and the characteristics of LVDS receiver high input impedance, and adopt simple bridging method just can the LVDS signal be divided into two-way, the central control circuit 6 of one road feed flow crystal panel is so that its normal display image signals; Then as the signal source of Dynamic control module, promptly the signal source as subsequent conditioning circuit at first transfers to signaling conversion circuit 2 on another road.
First change-over circuit 21 comprises and is connected the LVDS receiver IC4 (model is DS900CF386MTD) that is used for the LVDS conversion of signals is become the digital rgb signal with LVDS signal distribution circuit 1.Second change-over circuit 22 comprises the video dac IC3 (model is ADV7125KST140) that is connected with first change-over circuit 21, is used for the digital rgb conversion of signals is become the analog rgb signal.RGB coding circuit 23 comprises the triode Q1 that the resistance R 10, R11, R12 and the base stage that are connected on the video dac IC3 output terminal and resistance R 10, R11, R12 are connected simultaneously; The collector of triode Q1 connects the 5V power supply, and emitter is connected to signal processing circuit 3 in addition.
Luminance signal amplifying circuit 31 comprises the triode Q1 that is connected with signaling conversion circuit 2; DC restoration circuit 32 comprises the diode D1 that is connected with the collector of triode Q1; Dc amplification circuit 33 comprises the triode Q3 that triode Q2 that base stage is connected with diode D1 and base stage are connected with the collector of triode Q2; Wherein the collector of triode Q1, Q2, Q3 is connected with the 5V power supply, and the emitter of triode Q3 is connected with pwm pulse generative circuit 4.Above-mentioned analog video signal is after triode Q1 amplifies, and the direct current of forming through D1, Q2 and Q3 recovers and amplifying circuit 32,33 converts the variation of the peak-to-peak value of analog video signal to be proportional to the signal peak peak value dc voltage change.
In addition; Pwm pulse generative circuit 4 comprises the double operational PWM controller IC 7 that is connected with signal processing circuit 3; Wherein the first amplifier component frequency is about the square-wave oscillator of 400Hz; The output of this square-wave oscillator (i.e. the 1st pin) forms the normal phase input end (i.e. the 5th pin) that sawtooth wave is connected to second amplifier through the integrating circuit that resistance R 37, electric capacity R38 form; The dc voltage change that is proportional to the signal peak peak value that signal processing circuit 3 forms is connected to the inverting input (i.e. the 4th pin) of second amplifier, and the output terminal of second amplifier (i.e. the 7th pin) output is connected to the PWM input end of light emitting diode or cold-cathode lamp tube drive circuit corresponding to the pwm control signal of unlike signal voltage.
Ambient light adaptive circuit 5 comprises the triode Q5 that photosensitive device RV, base stage are connected with photosensitive device RV, and the dc voltage change that is proportional to the picture signal peak-to-peak value that the emitter of triode Q5 and signal processing circuit 3 are produced is connected to pwm pulse generative circuit 4 after adding circuit 7 additions.The resistance value that photosensitive device RV is different with environment different illumination conversion, therefore at the emitter of triode Q5 with regard to exportable different voltages with different.The DC voltage of the peak-to-peak value that is proportional to picture signal that this voltage and above-mentioned signal processing circuit 3 are produced is after adding circuit 7 additions that R34, R44 and R45 constituted; Be added to the 6th pin of double operational PWM controller IC 7, make and export the pwm control signal that can reflect dynamic image and different light environment at the 7th pin.
Adding circuit 7 comprises resistance R 43, R44, the R45 that circulation connects; Wherein the emitter of triode Q5 is connected between resistance R 43, the R44; The dc voltage change that is proportional to the picture signal peak-to-peak value that signal processing circuit 3 is produced is connected between resistance R 43, the R45, is the output terminal that is connected to pwm pulse generative circuit 4 between resistance R 44, the R45.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, any modification of being done within every spirit of the present invention and the principle, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. Novel LCD (Liquid Crystal Display) double energy-saving control module; It is characterized in that; Comprise the LVDS signal distribution circuit (1) that is connected with the LVDS signal output port, be connected with said LVDS signal distribution circuit (1) and be used for the LVDS conversion of signals is become the signaling conversion circuit (2) of analog video signal, is connected with said signaling conversion circuit (2) and is used for analog video signal is converted into the signal processing circuit (3) of dc voltage change, is connected the pwm pulse generative circuit (4) and the ambient light adaptive circuit (5) that are used for generating according to dc voltage change pwm control signal with said signal processing circuit (3) that the output of wherein said ambient light adaptive circuit (5) and dc voltage change are connected to said pwm pulse generative circuit (4) through an adding circuit (7).
2. Novel LCD (Liquid Crystal Display) double energy-saving control module according to claim 1; It is characterized in that; Said LVDS signal distribution circuit (1) adopts the mode of bridge joint that the LVDS signal is divided into two-way; One the road is connected to said signaling conversion circuit (2), and another road is connected to the central control circuit (6) of liquid crystal panel.
3. Novel LCD (Liquid Crystal Display) double energy-saving control module according to claim 1; It is characterized in that said signaling conversion circuit (2) comprises being connected with said LVDS signal distribution circuit (1) and is used for the LVDS conversion of signals is first change-over circuit (21) of digital rgb signal, is connected with said first change-over circuit (21) and is used for the digital rgb conversion of signals is second change-over circuit (22) of analog rgb signal and is connected with said second change-over circuit (22) and is used for the analog rgb signal is encoded to form the RGB coding circuit (23) of analog video signal.
4. Novel LCD (Liquid Crystal Display) double energy-saving control module according to claim 1; It is characterized in that said signal processing circuit (3) comprises and is connected the luminance signal amplifying circuit (31) that is used for analog video signal is amplified with said signaling conversion circuit (2), is connected with said luminance signal amplifying circuit (31) and is used for converting analog video signal into the DC restoration circuit (32) and be connected with said DC restoration circuit (32) of d. c. voltage signal that voltage swing is proportional to the peak-to-peak value of said analog video signal and is used for dc amplification circuit (33) that d. c. voltage signal is amplified.
5. Novel LCD (Liquid Crystal Display) double energy-saving control module according to claim 1 is characterized in that, the output terminal of said pwm pulse generative circuit (4) is connected to the PWM input end of light emitting diode or cold-cathode lamp tube drive circuit.
6. Novel LCD (Liquid Crystal Display) double energy-saving control module according to claim 3; It is characterized in that; Said first change-over circuit (21) comprises with said LVDS signal distribution circuit (1) and is connected the LVDS receiver that is used for the LVDS conversion of signals is become the digital rgb signal; Said second change-over circuit (22) comprises the video dac that is connected with said first change-over circuit (21); Said RGB coding circuit (23) comprises the triode Q1 that the resistance R 10, R11, R12 and the base stage that are connected on the said video dac output terminal and resistance R 10, R11, R12 are connected simultaneously; The collector of said triode Q1 connects the 5V power supply, and emitter is connected to said signal processing circuit (3).
7. Novel LCD (Liquid Crystal Display) double energy-saving control module according to claim 4; It is characterized in that; Said luminance signal amplifying circuit (31) comprises the triode Q1 that is connected with said signaling conversion circuit (2); Said DC restoration circuit (32) comprises the diode D1 that is connected with the collector of said triode Q1; Said dc amplification circuit (33) comprises the triode Q3 that triode Q2 that base stage is connected with said diode D1 and base stage are connected with the collector of said triode Q2, and the collector of wherein said triode Q1, Q2, Q3 is connected with the 5V power supply, and the emitter of said triode Q3 is connected with said pwm pulse generative circuit (4).
8. Novel LCD (Liquid Crystal Display) double energy-saving control module according to claim 5; It is characterized in that; Said pwm pulse generative circuit (4) comprises the double operational PWM controller IC 7 that is connected with said signal processing circuit (3); Wherein first amplifier is formed square-wave oscillator; The output of this square-wave oscillator forms the normal phase input end that sawtooth wave is connected to second amplifier through the integrating circuit that resistance R 37, electric capacity R38 form; The d. c. voltage signal that the voltage swing that said signal processing circuit (3) forms is proportional to the peak-to-peak value of said analog video signal is connected to the inverting input of second amplifier, and the output terminal output of second amplifier is connected to the PWM input end of light emitting diode or cold-cathode lamp tube drive circuit corresponding to the pwm control signal of different d. c. voltage signals.
9. Novel LCD (Liquid Crystal Display) double energy-saving control module according to claim 1; It is characterized in that; Said ambient light adaptive circuit (5) comprises the triode Q5 that photosensitive device RV, base stage are connected with said photosensitive device RV, and the d. c. voltage signal that the voltage swing that the emitter of said triode Q5 and said signal processing circuit (3) are produced is proportional to the peak-to-peak value of said analog video signal is connected to said pwm pulse generative circuit (4) after said adding circuit (7) addition.
10. Novel LCD (Liquid Crystal Display) double energy-saving control module according to claim 9; It is characterized in that; Said adding circuit (7) comprises resistance R 43, R44, the R45 that circulation connects; The emitter of wherein said triode Q5 is connected between resistance R 43, the R44; The d. c. voltage signal that the voltage swing that said signal processing circuit (3) is produced is proportional to the peak-to-peak value of said analog video signal is connected between resistance R 43, the R45, is the output terminal that is connected to said pwm pulse generative circuit (4) between resistance R 44, the R45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101050685A CN101783118B (en) | 2009-01-15 | 2009-01-15 | Novel LCD (Liquid Crystal Display) double energy-saving control module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101050685A CN101783118B (en) | 2009-01-15 | 2009-01-15 | Novel LCD (Liquid Crystal Display) double energy-saving control module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101783118A CN101783118A (en) | 2010-07-21 |
| CN101783118B true CN101783118B (en) | 2012-01-18 |
Family
ID=42523089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101050685A Expired - Fee Related CN101783118B (en) | 2009-01-15 | 2009-01-15 | Novel LCD (Liquid Crystal Display) double energy-saving control module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101783118B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321495B (en) * | 2014-06-25 | 2017-11-03 | 深圳Tcl新技术有限公司 | High definition display module and its display methods |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006040711A1 (en) * | 2005-09-09 | 2007-03-22 | Samsung Electro-Mechanics Co., Ltd., Suwon | Circuit for controlling a LED with temperature compensation |
| CN1996103A (en) * | 2006-08-18 | 2007-07-11 | 深圳创维－Rgb电子有限公司 | Energy-saving circuit for use in liquid crystal display |
| CN101295472A (en) * | 2007-04-24 | 2008-10-29 | 北京京东方光电科技有限公司 | LCD device high dynamic contrast processing equipment and method |
-
2009
- 2009-01-15 CN CN2009101050685A patent/CN101783118B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006040711A1 (en) * | 2005-09-09 | 2007-03-22 | Samsung Electro-Mechanics Co., Ltd., Suwon | Circuit for controlling a LED with temperature compensation |
| KR100735460B1 (en) * | 2005-09-09 | 2007-07-03 | 삼성전기주식회사 | A circuit for controlling led driving with temperature compensation |
| CN1996103A (en) * | 2006-08-18 | 2007-07-11 | 深圳创维－Rgb电子有限公司 | Energy-saving circuit for use in liquid crystal display |
| CN101295472A (en) * | 2007-04-24 | 2008-10-29 | 北京京东方光电科技有限公司 | LCD device high dynamic contrast processing equipment and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101783118A (en) | 2010-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102214432B (en) | Power management and control module and liquid crystal display | |
| CN102081908A (en) | Method and circuit for lowering power consumption of liquid crystal display | |
| CN101389177A (en) | Light regulating circuit | |
| KR100913740B1 (en) | Backlight unit and LC display device | |
| CN101673521A (en) | Liquid crystal display device and method for processing digital image signal | |
| TWI423238B (en) | Driving system for backlight unit, liquid crystal display device including the same and method of driving the same | |
| CN201262809Y (en) | Energy-saving device of LED electronic display screen | |
| CN205160658U (en) | Constant current drive controlling means and laser television | |
| CN111199715B (en) | Display device and driving method thereof | |
| CN102651205A (en) | Control method used for white light emitting diode (LED) direct type dynamic backlight | |
| CN101770751A (en) | System and method for regulating brightness of backlight module of liquid crystal display | |
| CN101783118B (en) | Novel LCD (Liquid Crystal Display) double energy-saving control module | |
| CN106708145B (en) | Multichannel power supply circuit | |
| CN205378153U (en) | LEDTV remote control receiving control circuit | |
| CN111833828A (en) | Debugging method and system for factory settings of low-power-consumption liquid crystal display | |
| CN208806051U (en) | A kind of display, display device and its control circuit | |
| CN100437727C (en) | Liquid crystal display device and its drive method | |
| CN201748359U (en) | Direct type light-emitting diode (LED) backlight source device | |
| CN101751879A (en) | Liquid crystal display, backlight control system and method | |
| CN107871478A (en) | Drive circuit, method and the display device of display module | |
| TWI254267B (en) | Dimming control method and lighting system employing the same | |
| CN201369154Y (en) | Liquid crystal display device | |
| CN202025518U (en) | Liquid crystal screen backlight control circuit and computer | |
| CN213303615U (en) | Integrated liquid crystal display driving equipment | |
| CN103854623B (en) | Segmented multi-path liquid crystal display achieving driving by I/O port of MCU and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20150129 Granted publication date: 20120118 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20150729 Granted publication date: 20120118 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20150115 |
|
| EXPY | Termination of patent right or utility model |