CN101692324B - Timing controller with built-in voltage stabilizing circuit function - Google Patents
Timing controller with built-in voltage stabilizing circuit function Download PDFInfo
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- CN101692324B CN101692324B CN2009102045256A CN200910204525A CN101692324B CN 101692324 B CN101692324 B CN 101692324B CN 2009102045256 A CN2009102045256 A CN 2009102045256A CN 200910204525 A CN200910204525 A CN 200910204525A CN 101692324 B CN101692324 B CN 101692324B
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Abstract
The invention discloses a timing controller with a built-in voltage stabilizing circuit function, which comprises an LVDS receiving module, a timing control module, a DC-DC conversion module and a GAMMA voltage module. A 3.3 V voltage input interface of the timing controller is connected with the DC-DC conversion module of which the output end is connected with VGH and VGL output interfaces of the timing controller; the DC-DC conversion module outputs a voltage to the GAMMA voltage module; the output end of the GAMMA voltage module is connected with a GAMMA voltage output interface of the timing controller; an image signal input interface of the timing controller is connected with the LVDS receiving module; the LVDS receiving module is connected with the timing control module through a data bus; and the timing control module is connected with the signal output interface of the timing controller. The timing controller with a built-in voltage stabilizing circuit function can reduce EMI interference, improve the display effect of a picture and save the space of a PCB, and is favorable for producing thinner and lighter products.
Description
Technical field
The present invention discloses the timing controller of a kind of timing controller, particularly a kind of built-in voltage stabilizing circuit function.
Background technology
Along with the application of lcd technology in people life more and more widely, lcd technology and relevant with it components and parts thereof also obtain very big development.In the driving of liquid crystal display; The timing controller element that is absolutely necessary; Please referring to accompanying drawing 1; In existing timing controller motherboard circuit block scheme, can see, except this master chip of timing controller, also need power circuits such as external LED chip for driving, DC-DC change-over circuit and Gamma potential circuit.In the prior art because DC-DC change-over circuit and Gamma circuit need independent circuit generation; Can cause the EMI poor when causing pcb board can't dwindle space and power supply switching; Gamma voltage relies on the non-essential resistance string to produce and also is easy to generate deviation, influences picture display effect.
Summary of the invention
In the above-mentioned liquid crystal display sequential control circuit of mentioning of the prior art; DC-DC change-over circuit and Gamma potential circuit need external separately and shortcoming that cause; The present invention provides a kind of new sequential control circuit; Integrated time-sequence control module, DC-DC modular converter and Gamma voltage module have solved the problems referred to above.
The technical scheme that the present invention solves its technical matters employing is: a kind of timing controller of built-in voltage stabilizing circuit function; Timing controller comprises LVDS receiver module, time-sequence control module, DC-DC modular converter and GAMMA voltage module; The 3.3V voltage input interface of timing controller is connected with the DC-DC modular converter; DC-DC modular converter output terminal and timing controller+15V level VGH is connected with 10V level VGL output interface; DC-DC modular converter output voltage is given the GAMMA voltage module, and GAMMA voltage module output terminal is connected with the GAMMA voltage output interface of timing controller, and the image signal input interface of timing controller is connected with the LVDS receiver module; The LVDS receiver module is connected with time-sequence control module through data bus, and time-sequence control module is connected with the signal output interface of timing controller.
The technical scheme that the present invention solves its technical matters employing further comprises:
Described each module adopts 3D to pile up production technology to be layered laminate at chip and to arrange, and the DC-DC modular converter independently be one deck, and the GAMMA voltage module independently is one deck, and LVDS receiver module and time-sequence control module are positioned at one deck, and each intermodule passes through the connection that goes between.
Described DC-DC modular converter comprises pulse generating module and three road rectification modules; The pulse generating module power output end is divided into three the tunnel; Connect one road rectification module respectively, first via rectification module adopts two groups of switching diodes, and the output of first via pulse generating module power supply is connected to the input end of two groups of switching diodes respectively; The high level output conduct+15V level VGH of first group of switching diode; With timing controller+15V level VGH interface is connected, the low level output of first group of switching diode is connected with the high level output of second group of switching diode, the low level of second group of switching diode is exported conduct+10V level AVDD; Be connected with voltage stabilizing diode in the output of the second road pulse generating module power supply, the output conduct of voltage stabilizing diode+10V level AVDD is connected with the GAMMA voltage module; Be connected with one group of switching diode in the Third Road pulse generating module power supply output, the high level output ground connection of switching diode, the low level output conduct-10V level VGL of switching diode, with timing controller-10V level VGL interface is connected.
Described GAMMA voltage module adopts the resistance that is connected in series to constitute, and the common node that each resistance is connected is the output terminal of GAMMA voltage module.
The invention has the beneficial effects as follows: the present invention is inner at timing controller through utilizing 3D to pile up process integration through power units such as DC-DC modular converter and Gamma voltage modules; The EMI that produces in the time of can masking DC-DC power supply switching frequency disturbs; Can avoid simultaneously because the skew of resistance value causes voltage inaccurate; Make the Gamma voltage of output can be more accurate, can promote the display effect of picture, reduced a lot of electronic components simultaneously; Saved the space of PCB, helped product and accomplish thinner lighter.
To combine accompanying drawing and embodiment that the present invention is further specified below.
Description of drawings
Fig. 1 is a timing controller motherboard circuit plate block scheme of the prior art.
Fig. 2 is an inner structure block scheme of the present invention.
Fig. 3 is DC-DC modular converter equivalent circuit theory figure of the present invention.
Fig. 4 is Gamma voltage module equivalent circuit theory figure of the present invention.
Fig. 5 is a timing controller motherboard circuit plate block scheme of the present invention.
Embodiment
Present embodiment is the preferred embodiment for the present invention, and other all its principles are identical with present embodiment or approximate with basic structure, all within protection domain of the present invention.
Please referring to accompanying drawing 2; The present invention mainly comprises LVDS receiver module, time-sequence control module, DC-DC modular converter and GAMMA voltage module; External interface of the present invention mainly comprises 3.3V voltage input interface, image signal input interface, data-signal output interface, VGH and VGL output interface and GAMMA voltage output interface; Wherein, 3.3V voltage input interface of the present invention is connected with the DC-DC modular converter, and DC-DC modular converter output terminal is connected with the VGL output interface with VGH of the present invention, and DC-DC modular converter output voltage is given the GAMMA voltage module; GAMMA voltage module output terminal is connected with GAMMA voltage output interface of the present invention; Image signal input interface of the present invention is connected with the LVDS receiver module, and the LVDS receiver module is connected with time-sequence control module through data bus, and time-sequence control module is connected with signal output interface of the present invention.Among the present invention; Each module adopts 3D to pile up production technology to be layered laminate at chip and to arrange, and the DC-DC modular converter independently is one deck, and the GAMMA voltage module independently is one deck; LVDS receiver module and time-sequence control module are positioned at one deck, and each intermodule connects through lead-in wire.
Please referring to accompanying drawing 3, the equivalent electrical circuit of the DC-DC modular converter in the present embodiment mainly comprises two parts, i.e. pulse generating module and rectification module; In the present embodiment; Pulse generating module comprises the pulse generation chip U3 and the FET Q3 of equivalence, and pulse generation chip U3 is equivalent to the pulse generation chip that model is FP6791, and the input end of pulse generation chip U3 is connected with filtration module; Be used for the spike of filtering input dc power; With protection pulse generation chip U3, in the present embodiment, filtration module adopts the capacitor C 201 and capacitor C 202 that is connected in parallel.The pulse output end of pulse generation chip U3 is connected on the control end of FET Q3; FET Q3 one end ground connection; The other end is the output terminal of pulse generating module; Be connected with inductance L 201 between pulse generating module input end and the pulse generating module output terminal, the output pulse of the FET Q3 that is used to superpose promptly produces high voltage level.Through pulse generating module the 3.3V direct current of importing is become alternating current; Be connected with three road rectification modules on the output terminal of pulse generating module; The VGH of 15V is provided respectively, and the VGL of-10V and the AVDD of 10V are in the present embodiment; First via rectification module adopts two groups of switching diodes; Be switching diode DM1 and switching diode DM2, the output of first via pulse generating module power supply is connected to the input end of switching diode DM1 and switching diode DM2 respectively, and the high level output of switching diode DM1 is communicated with VGH output interface of the present invention; The low level output of switching diode DM1 is connected with the high level output of switching diode DM2, and the low level output of switching diode DM2 is as AVDD; Be connected with voltage stabilizing diode D201 in the output of the second road pulse generating module power supply; In the present embodiment, voltage stabilizing diode D201 is equivalent to the voltage stabilizing diode that model is SB07-03C, and the output of voltage stabilizing diode D201 is as AVDD; 10V is provided voltage, is connected with the GAMMA voltage module; Be connected with one group of switching diode DM4 in the output of Third Road pulse generating module power supply, the high level output ground connection of switching diode DM4, the low level output of switching diode DM4 is connected with the VGL interface of timing controller as VGL.In the present embodiment; Each switching diode comprises two diode in series; The positive pole of first diode is connected with the negative pole of second diode; The common port of two diodes is the input end of switching diode, and the negative pole of first diode is the low level output terminal, the just very high level output terminal of second diode.
Please referring to accompanying drawing 4, the GAMMA voltage module in the present embodiment adopts the resistance string that is connected in series to constitute, and the common node of each adjacent resistor is a GAMMA voltage output, through the dividing potential drop of each resistance, obtains the voltages having different magnitude value.
Please referring to accompanying drawing 5, the present invention only needs extraneous led drive circuit in use, gets final product for LCDs provides backlight, and the direct outputting data signals driving liquid crystal screen of the present invention is exported control signal, the demonstration of control liquid crystal display simultaneously.
The present invention is inner at timing controller through utilizing 3D to pile up process integration through power units such as DC-DC modular converter and Gamma voltage modules; The EMI that produces in the time of can masking DC-DC power supply switching frequency disturbs, and can avoid simultaneously because the skew of resistance value causes voltage inaccurate, makes the Gamma voltage of output can be more accurate; Can promote the display effect of picture; Reduced a lot of electronic components simultaneously, saved the space of PCB, helped product and accomplish thinner lighter.
Claims (4)
1. the timing controller of a built-in voltage stabilizing circuit function; It is characterized in that: described timing controller comprises LVDS receiver module, time-sequence control module, DC-DC modular converter and GAMMA voltage module; The 3.3V voltage input interface of timing controller is connected with the DC-DC modular converter; DC-DC modular converter output terminal and timing controller+15V level VGH is connected with-10V level VGL output interface; DC-DC modular converter output voltage is given the GAMMA voltage module, and GAMMA voltage module output terminal is connected with the GAMMA voltage output interface of timing controller, and the image signal input interface of timing controller is connected with the LVDS receiver module; The LVDS receiver module is connected with time-sequence control module through data bus, and time-sequence control module is connected with the signal output interface of timing controller.
2. the timing controller of built-in voltage stabilizing circuit function according to claim 1; It is characterized in that: described each module adopts 3D to pile up production technology to be layered laminate at chip and to arrange; The DC-DC modular converter independently is one deck; The GAMMA voltage module independently is one deck, and LVDS receiver module and time-sequence control module are positioned at one deck, and each intermodule connects through lead-in wire.
3. the timing controller of built-in voltage stabilizing circuit function according to claim 1 and 2; It is characterized in that: described DC-DC modular converter comprises pulse generating module and three road rectification modules; The pulse generating module power output end is divided into three the tunnel; Connect one road rectification module respectively, first via rectification module adopts two groups of switching diodes, and the output of first via pulse generating module power supply is connected to the input end of two groups of switching diodes respectively; The high level output conduct+15V level VGH of first group of switching diode; With timing controller+15V level VGH output interface is connected, the low level output of first group of switching diode is connected with the high level output of second group of switching diode, the low level of second group of switching diode is exported conduct+10V level AVDD; Be connected with voltage stabilizing diode in the output of the second road pulse generating module power supply, the output conduct of voltage stabilizing diode+10V level AVDD is connected with the GAMMA voltage module; Be connected with one group of switching diode in the Third Road pulse generating module power supply output, the high level output ground connection of switching diode, the low level output conduct-10V level VGL of switching diode, with timing controller-10V level VGL output interface is connected.
4. the timing controller of built-in voltage stabilizing circuit function according to claim 1 and 2 is characterized in that: described GAMMA voltage module adopts the resistance that is connected in series to constitute, and the common node that each resistance is connected is the output terminal of GAMMA voltage module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102045256A CN101692324B (en) | 2009-09-29 | 2009-09-29 | Timing controller with built-in voltage stabilizing circuit function |
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| CN2009102045256A CN101692324B (en) | 2009-09-29 | 2009-09-29 | Timing controller with built-in voltage stabilizing circuit function |
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| CN101692324A CN101692324A (en) | 2010-04-07 |
| CN101692324B true CN101692324B (en) | 2012-06-06 |
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| CN105096882B (en) * | 2015-08-25 | 2018-04-20 | 昆山龙腾光电有限公司 | The drive system and liquid crystal display device of liquid crystal display panel |
| CN106208691A (en) * | 2016-08-29 | 2016-12-07 | 合肥惠科金扬科技有限公司 | A kind of liquid crystal display screen power supply |
| CN106300971A (en) * | 2016-08-29 | 2017-01-04 | 合肥惠科金扬科技有限公司 | A kind of driving mu balanced circuit of liquid crystal display module |
| CN106130345A (en) * | 2016-08-29 | 2016-11-16 | 合肥惠科金扬科技有限公司 | A kind of anti-power failure liquid crystal display screen power supply |
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