CN107665689A - Gamma chip, timing controller and liquid crystal display device - Google Patents

Gamma chip, timing controller and liquid crystal display device Download PDF

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Publication number
CN107665689A
CN107665689A CN201711024753.6A CN201711024753A CN107665689A CN 107665689 A CN107665689 A CN 107665689A CN 201711024753 A CN201711024753 A CN 201711024753A CN 107665689 A CN107665689 A CN 107665689A
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CN
China
Prior art keywords
grey
gtg
partial pressure
scale range
voltage
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CN201711024753.6A
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Chinese (zh)
Inventor
王艳雪
郑巍巍
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深圳市华星光电技术有限公司
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Priority to CN201711024753.6A priority Critical patent/CN107665689A/en
Publication of CN107665689A publication Critical patent/CN107665689A/en

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3696Generation of voltages supplied to electrode drivers

Abstract

The present invention provides a kind of gamma chip, timing controller and liquid crystal display device.Gamma chip includes voltage input end and multiple ties up a voltage output end, voltage receiving terminal receives initial voltage, the initial voltage received is carried out partial pressure to obtain multiple tying up a voltage by gamma chip, and exported by tying up a voltage output end, it is corresponding with the voltage in predeterminated voltage brightness curve to tie up a voltage, first grey-scale range is obtained by the first partial pressure mode partial pressure N number of to tie up a voltage, M are obtained by the second partial pressure mode partial pressure to the second grey-scale range and ties up a voltage, P are obtained by the 3rd partial pressure mode partial pressure to the 3rd grey-scale range and ties up a voltage, GTG in first grey-scale range is GTG minimum in three grey-scale ranges, each resistance number corresponding to GTG is more than each corresponding resistance number in the second grey-scale range in first grey-scale range, and more than resistance number corresponding to each GTG in the 3rd grey-scale range.

Description

Gamma chip, timing controller and liquid crystal display device

Technical field

The present invention relates to field of liquid crystal display, more particularly to a kind of gamma chip, timing controller and liquid crystal display dress Put.

Background technology

With the rapid development of the technologies such as semiconductor technology, lcd technology, liquid crystal display device is because volume is light, consumption The advantages that electricity is few and be well received by consumers.Liquid crystal display device includes gamma chip (Gamma IC), timing controller (timer control, TCON), liquid crystal display panel etc..The gamma chip receives external voltage, and external voltage is changed A voltage is tied up into multiple, ties up a voltage described in the timing controller reception, and multiple ashes are obtained according to a voltage of tying up Rank voltage, the gray scale voltage are supplied to the liquid crystal display panel, to cause the liquid crystal display panel to show different ashes Rank.So that the liquid crystal display panel shows 256 GTGs as an example, the gamma chip receives external voltage, and external voltage is changed A voltage is tied up for 9, the timing controller receives this 9 and ties up a voltage, and ties up a voltage according to this 9 and obtain 256 Gray scale voltage.Gamma chip includes the multiple resistance being cascaded, and the external voltage received is carried out into partial pressure to obtain A voltage is tied up to multiple.Timing controller includes the resistance of multiple series connection, by receive tie up voltage carry out partial pressure with Obtain multiple gray scale voltages.As can be seen here, multiple gray scale voltages pass through for primary voltage and are evenly dividing to obtain, however, human eye pair It is different in the sensitivity of different GTGs, human eye is higher than the susceptibility to high gray for the susceptibility of low GTG.Cause This, traditional partial pressure mode can cause user to think that the display effect of low GTG is not fine and smooth enough, and then cause user to watch liquid crystal When image or video that display panel is shown, feel that display effect is bad.

The content of the invention

The present invention provides a kind of gamma chip, and the gamma chip includes a voltage input end and multiple to tie up a voltage defeated Go out end, the voltage receiving terminal is used to receive initial voltage, and the gamma chip is used for receive the voltage input end Initial voltage carry out partial pressure with obtain magnitude of voltage it is mutually different it is multiple tie up a voltage, each tie up a voltage and tie up an electricity by one Output end output is pressed, a voltage of tying up shows the predeterminated voltage-brightness showed during default brightness with liquid crystal display panel Voltage in curve is corresponding, and the gamma chip by the initial voltage received carry out partial pressure when:Corresponding first GTG model Enclose and carry out partial pressure according to the first partial pressure mode and tie up a voltage, corresponding second GTG model to obtain the N number of of corresponding first grey-scale range Enclose and carry out partial pressure according to the second partial pressure mode and tie up a voltage, corresponding 3rd GTG model to obtain the M of corresponding second grey-scale range Enclose and carry out partial pressure according to the 3rd partial pressure mode and tie up a voltage to obtain the P of corresponding 3rd grey-scale range, wherein, first ash GTG in order range is less than the GTG in second grey-scale range, and the GTG in second grey-scale range is less than described the GTG in three grey-scale ranges, the number of resistance corresponding to each GTG is the when carrying out partial pressure according to the first partial pressure mode One preset number, the number of resistance corresponding to each GTG is the second preset number when carrying out partial pressure according to the second partial pressure mode, The number of resistance corresponding to each GTG is the 3rd preset number when carrying out partial pressure according to the 3rd partial pressure mode, described first Preset number is more than second preset number, and first preset number is more than the 3rd preset number, and N, M and P are Positive integer, and N+M+P is equal to preset number.

Compared to prior art, gamma chip of the invention by the initial voltage received when carrying out partial pressure:Corresponding the According to the first partial pressure mode partial pressure carried out in one grey-scale range obtain the N number of of corresponding first grey-scale range tying up a voltage, corresponding the Two grey-scale ranges according to the second partial pressure mode carry out partial pressure and obtain M of corresponding second grey-scale range tying up a voltage, and the corresponding 3rd According to the 3rd partial pressure mode partial pressure carried out in grey-scale range obtain P of corresponding 3rd grey-scale range tying up a voltage, described first Preset number is more than second preset number, and first preset number is more than the 3rd preset number.Due to described One preset number is more than the second preset number and is more than the 3rd preset number, and therefore, gamma chip of the invention is to the first GTG In the range of GTG carry out more fine partial pressure, a GTG is divided into more sub- GTGs, preset in this grey-scale range Corresponding to the GTG of number so that when user watches the image or video shown during liquid crystal display panel, this grey-scale range Interior display effect is finer and smoother, improves viewing effect when user watches image or video.Further, it is of the invention Gamma chip uses rough partial pressure to the GTG in the 3rd grey-scale range, reduces the number of the resistance in this grey-scale range Mesh, and it is less to tie up a voltage in this grey-scale range corresponding to the GTG of preset number.Therefore, gamma chip of the invention can not The total number for tying up a voltage output end of increase, the framework of the binding voltage output end of traditional gamma chip can be utilized.

Present invention also offers a kind of timing controller, the timing controller ties up a voltage receiving terminal including multiple And multiple gray scale voltage output ends, each tie up a voltage receiving terminal be used for receive one tie up a voltage, and each tie up a voltage What receiving terminal received ties up that a voltage is different, and described tie up when a voltage shows default brightness with liquid crystal display panel is showed Predeterminated voltage-brightness curve in voltage it is corresponding, and the timing controller ties up a voltage minute by what is received During pressure:Corresponding 4th grey-scale range carries out partial pressure to obtain A GTG of corresponding 4th grey-scale range according to the 4th partial pressure mode Voltage, corresponding 5th grey-scale range carry out partial pressure to obtain B GTG of corresponding 5th grey-scale range according to the 5th partial pressure mode Voltage, corresponding 6th grey-scale range carry out partial pressure to obtain C GTG of corresponding 6th grey-scale range according to the 6th partial pressure mode Voltage, wherein, the GTG in the 4th grey-scale range is less than the GTG in the 5th grey-scale range, the 5th GTG model The GTG enclosed is less than the GTG in the 6th grey-scale range, each GTG when carrying out partial pressure according to the 4th partial pressure mode The number of corresponding resistance is the 4th preset number, resistance corresponding to each GTG when carrying out partial pressure according to the 5th partial pressure mode Number is the 5th preset number, and the number of resistance corresponding to each GTG is the when carrying out partial pressure according to the 6th partial pressure mode Six preset numbers, the 4th preset number are more than the 5th preset number, and the 4th preset number is more than described the Six preset numbers, A, B and C are positive integer, and A+B+C is equal to preset number.

Present invention also offers a kind of liquid crystal display device, the liquid crystal display device includes foregoing gamma chip Or timing controller.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.

Fig. 1 is the structural representation for the gamma chip that a better embodiment of the invention provides.

Fig. 2 is that liquid crystal display panel shows the predeterminated voltage-brightness curve figure showed during default brightness.

Fig. 3 is the structural representation for the timing controller that a better embodiment of the invention provides.

Fig. 4 is the structural representation for the liquid crystal display device that a better embodiment of the invention provides.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.

Also referring to the structural representation that Fig. 1 and Fig. 2, Fig. 1 are the gamma chip that a better embodiment of the invention provides Figure;Fig. 2 is that liquid crystal display panel shows the predeterminated voltage-brightness curve figure showed during default brightness.The gamma chip (Gamma IC) 100 includes a voltage input end 110 and multiple ties up a voltage output end 120.The voltage receiving terminal 110 is used In receiving initial voltage, the initial voltage that the gamma chip 100 is used to receive the voltage input end 110 carries out partial pressure With obtain magnitude of voltage it is mutually different it is multiple tie up a voltage, each tie up a voltage and tie up a voltage output end 120 by one and export. A voltage of tying up shows the predeterminated voltage-brightness curve showed during default brightness (such as Fig. 2 institutes with liquid crystal display panel Show, such as the curves of Gamma 2.2) in voltage it is corresponding, and the gamma chip 100 is divided the initial voltage received During pressure:Corresponding first grey-scale range carries out partial pressure according to the first partial pressure mode and tied up a little with obtaining corresponding the N number of of first grey-scale range Voltage, corresponding second grey-scale range carry out partial pressure according to the second partial pressure mode and tied up a little with obtaining M of corresponding second grey-scale range Voltage, corresponding 3rd grey-scale range carry out partial pressure according to the 3rd partial pressure mode and tied up a little with obtaining P of corresponding 3rd grey-scale range Voltage, wherein, the GTG in first grey-scale range is less than the GTG in second grey-scale range, the second GTG model The GTG enclosed is less than the GTG in the 3rd grey-scale range, each GTG when carrying out partial pressure according to the first partial pressure mode The number of corresponding resistance is the first preset number, resistance corresponding to each GTG when carrying out partial pressure according to the second partial pressure mode Number is the second preset number, and the number of resistance corresponding to each GTG is the when carrying out partial pressure according to the 3rd partial pressure mode Three preset numbers, first preset number are more than second preset number, and first preset number is more than described the Three preset numbers, N, M and P are positive integer, and N+M+P is equal to preset number.So that liquid crystal display panel shows 256 GTGs as an example, The N+M+P is equal to 9.That is, described gamma chip 100 receives initial voltage, and the gamma by the voltage input end 110 Initial voltage progress partial pressure is tied up a voltage by chip 100 to obtain mutually different 9 of magnitude of voltage.Now, it is described to tie up a little The number of voltage output end 120 is also 9.Tie up a voltage and tie up a voltage output end and correspond, i.e., each tie up a voltage warp Cross one and tie up a voltage output end 120 and export.The gamma chip 100 includes the multiple resistance being cascaded, can be to institute The initial voltage that voltage input end 110 receives is stated to carry out partial pressure magnitude of voltage is mutually different multiple to tie up a voltage to obtain. In one embodiment, the number for the GTG that number and the liquid crystal display panel of the resistance are shown is identical.

In the present embodiment, first preset number is more than second preset number, and second present count Mesh is more than the 3rd preset number.

In other embodiments, first preset number is more than second preset number, and described second is default Number is equal to the 3rd preset number.

In one embodiment, first grey-scale range, second grey-scale range and the 3rd grey-scale range are Three continuous grey-scale ranges.For example, so that liquid crystal display panel shows 256 GTGs as an example, first grey-scale range is 0 ~31 GTGs;Second grey-scale range is 32~127 GTGs;3rd grey-scale range is 128~255 GTGs.Why First grey-scale range is taken as 0~31, is because brightness is larger with gray scale variation in this grey-scale range and human eye is to this Brightness in grey-scale range is more sensitive with the change of GTG, therefore, by the GTG in this grey-scale range according to the first partial pressure side Formula carries out partial pressure, can make it that resistance number is more corresponding to each GTG, and the GTG of preset number is corresponding in this grey-scale range To tie up a voltage more, i.e. a GTG is divided into more sub- GTGs, so that when user watches liquid crystal display panel When the image or video of display, the display effect in this grey-scale range is finer and smoother, improves user and watches image or regard Viewing effect during frequency.Why the 3rd grey-scale range is taken as 128~255, is because brightness is with ash in this grey-scale range Rank approximately linear changes and human eye is less sensitive with the change of GTG to the brightness in this grey-scale range.

In another embodiment, First Transition ash is included between first grey-scale range and second grey-scale range Order range, the second transition grey-scale range is included between second grey-scale range and the 3rd grey-scale range.Wherein, described GTG in one transition grey-scale range is more than in the GTG in first grey-scale range and the First Transition grey-scale range GTG is less than the GTG in second grey-scale range, and the GTG in the second transition grey-scale range is more than second GTG The GTG in GTG and the second transition grey-scale range in scope is less than the GTG in the 3rd grey-scale range.Described Partial pressure is carried out according to the 4th partial pressure mode in First Transition grey-scale range, it is low when carrying out partial pressure according to the 4th partial pressure mode The number of resistance corresponding to GTG is more than or equal to the number of resistance corresponding to high gray, and in the First Transition GTG model In enclosing:The number of resistance corresponding with the GTG that first grey-scale range is nearest is more than nearest with second grey-scale range The number of resistance corresponding to GTG.

Partial pressure is carried out according to the 5th partial pressure mode in the second transition grey-scale range, according to the 5th partial pressure mode When carrying out partial pressure, the number of resistance corresponding to low GTG is more than or equal to the number of resistance corresponding to high gray, and described the In two transition grey-scale ranges:The number of resistance corresponding with the GTG that second grey-scale range is nearest is more than and the described 3rd ash The number of resistance corresponding to the nearest GTG of order range.

Why First Transition grey-scale range is set between first grey-scale range and second grey-scale range, and Partial pressure is carried out using the 4th partial pressure mode in the First Transition grey-scale range, be in order to avoid in the first grey-scale range by It is serious according to the first partial pressure mode be divided to brightness saltus step when carrying out partial pressure according to the second partial pressure mode in the second grey-scale range. Similarly, the second transition GTG is set between second grey-scale range and the 3rd grey-scale range, and described second Partial pressure is carried out using the 5th partial pressure mode in transition grey-scale range, be in order to avoid in the second grey-scale range according to the second partial pressure It is serious that mode be divided to brightness saltus step when carrying out partial pressure according to the 3rd partial pressure mode in the 3rd grey-scale range.

For example, so that liquid crystal display panel shows 256 GTGs as an example, first grey-scale range is 0~21 GTG;Institute It is 22~41 GTGs to state First Transition grey-scale range;Second grey-scale range is 42~117 GTGs;The second transition GTG For 118~137 GTGs;3rd GTG is 138~255 GTGs.

In one embodiment, first preset number is four, and second preset number is one, and the described 3rd is default Number is 0. 5, and required resistance is first resistor when carrying out partial pressure according to the first partial pressure mode, each first electricity The resistance all same of resistance.And, it is preferable that the resistance of each resistance corresponding to GTG is equal to the second GTG model in the first grey-scale range The resistance of resistance corresponding to interior each GTG is enclosed, and equal to the resistance of resistance corresponding to each GTG in the 3rd grey-scale range.Often The resistance of resistance corresponding to individual GTG can show the predeterminated voltage-brightness showed during default brightness according to liquid crystal display panel Curve matching goes out total voltage corresponding to all GTGs, because the resistance in the gamma chip 100 is series connection, each Each resistance corresponding to GTG is also what is be cascaded in grey-scale range, further according to electric resistance partial pressure principle, calculates each ash The resistance value of resistance corresponding to rank.

In another embodiment, first preset number is four, and second preset number is one, and the described 3rd is pre- If number is 0. 5, required resistance is first resistor when carrying out partial pressure according to the first partial pressure mode, described the In one grey-scale range, in first resistor corresponding to each GTG, the resistance value of the first resistor of neighbouring low GTG is grey to neighbouring height The resistance value of the first resistor of rank is linearly increasing or linear reduction.And, it is preferable that each GTG is corresponding in the first grey-scale range The resistance of resistance be equal to the resistance of resistance corresponding to each GTG in the second grey-scale range, it is and every equal in the 3rd grey-scale range The resistance of resistance corresponding to individual GTG.It should be noted that the 3rd preset number refers in the 3rd GTG model for 0. 5 When carrying out partial pressure according to the 3rd partial pressure mode in enclosing, the number of resistance corresponding to each GTG is 0. 5, i.e. two adjacent A corresponding resistance between GTG.

Compared to prior art, gamma chip of the invention by the initial voltage received when carrying out partial pressure:Corresponding the According to the first partial pressure mode partial pressure carried out in one grey-scale range obtain the N number of of corresponding first grey-scale range tying up a voltage, corresponding the Two grey-scale ranges according to the second partial pressure mode carry out partial pressure and obtain M of corresponding second grey-scale range tying up a voltage, and the corresponding 3rd According to the 3rd partial pressure mode partial pressure carried out in grey-scale range obtain P of corresponding 3rd grey-scale range tying up a voltage, described first Preset number is more than second preset number, and first preset number is more than the 3rd preset number.The gal of the present invention Horse chip carries out more fine partial pressure to the GTG in the first grey-scale range, and a GTG is divided into more sub- GTGs, In this grey-scale range corresponding to the GTG of preset number so that when user watches liquid crystal display panel the image that shows or During video, the display effect in this grey-scale range is finer and smoother, improves viewing effect when user watches image or video. Further, gamma chip of the invention uses rough partial pressure to the GTG in the 3rd grey-scale range, reduces in this GTG In the range of resistance number, and it is less to tie up a voltage in this grey-scale range corresponding to the GTG of preset number.Therefore, it is of the invention Gamma chip can not increase total number for tying up a voltage output end, can utilize traditional gamma chip binding voltage The framework of output end.

Referring to Fig. 3, Fig. 3 is the structural representation for the timing controller that a better embodiment of the invention provides.Institute State timing controller 200 and tie up a voltage receiving terminal 210 and multiple gray scale voltage output ends 220 including multiple.Each tie up a little Voltage receiving terminal 210, which is used to receiving one, ties up a voltage, and it is each tie up that a voltage receiving terminal 210 receives tie up each not phase of a voltage Together, a voltage of tying up shows predeterminated voltage-brightness curve (such as Fig. 2 showed during default brightness with liquid crystal display panel It is shown, such as, the curves of Gamma 2.2) in voltage it is corresponding.And the timing controller 200 ties up an electricity by what is received When pressure carries out partial pressure:Corresponding 4th grey-scale range carries out partial pressure to obtain corresponding 4th grey-scale range according to the 6th partial pressure mode A gray scale voltage, corresponding 5th grey-scale range carry out partial pressure to obtain the B of corresponding 5th grey-scale range according to the 7th partial pressure mode Individual gray scale voltage, corresponding 6th grey-scale range carry out partial pressure to obtain the C of corresponding 6th grey-scale range according to the 8th partial pressure mode Individual gray scale voltage, wherein, GTG in the 4th grey-scale range is less than the GTG in the 5th grey-scale range, and the described 5th GTG in grey-scale range is less than the GTG in the 6th grey-scale range, every when carrying out partial pressure according to the 6th partial pressure mode The number of resistance corresponding to individual GTG is the 4th preset number, when carrying out partial pressure according to the 7th partial pressure mode corresponding to each GTG The number of resistance is the 5th preset number, the number of resistance corresponding to each GTG when carrying out partial pressure according to the 8th partial pressure mode Mesh is the 6th preset number, and the 4th preset number is more than the 5th preset number, and the 4th preset number is more than 6th preset number, A, B and C are positive integer, and A+B+C is equal to preset number.256 GTGs are shown with liquid crystal display panel Exemplified by, the A+B+C is equal to 256.That is, exemplified by showing 256 GTGs for liquid crystal display panel, now, a voltage of tying up connects The number of receiving end 210 is usually 9, and the number of the gray scale voltage output end 220 is usually 256.The SECO core Piece 200 includes multiple resistance for being cascaded, with to it is described tie up that a voltage receiving terminal 210 receives tie up a voltage minute Press to obtain the mutually different multiple gray scale voltages of magnitude of voltage.

4th grey-scale range, the 5th grey-scale range and the 6th grey-scale range are three continuous GTG models Enclose.

In one embodiment, the 4th preset number is four, and the 5th preset number is one, and the described 6th is default Number is 0. 5, and required resistance is the 4th resistance when carrying out partial pressure according to the 4th partial pressure mode, each 4th electricity The resistance all same of resistance.

It is to be appreciated that in other embodiments, the resistance value of the 4th resistance can also be different.In an embodiment party In formula, the 4th preset number is four, and the 5th preset number is one, and the 6th preset number is 0. 5, according to It is the 4th resistance that the 4th partial pressure mode, which carries out resistance required during partial pressure, in first grey-scale range, each ash In 4th resistance corresponding to rank, the resistance value of the resistance value of the 4th resistance of neighbouring low GTG to the 4th resistance of neighbouring high gray Linearly increasing or linear reduction.

Include the 3rd transition grey-scale range, the 5th ash between 4th grey-scale range and the 5th grey-scale range Include the 4th transition grey-scale range between order range and the 6th grey-scale range, wherein, in the 3rd transition grey-scale range GTG be more than the GTG in the 4th grey-scale range and GTG in the 3rd transition grey-scale range is less than the described 5th GTG in grey-scale range, the GTG in the 4th transition grey-scale range are more than GTG and institute in the 5th grey-scale range State the GTG that the GTG in the 4th transition grey-scale range is less than in the 6th grey-scale range;

Partial pressure is carried out according to the 9th partial pressure mode in the 3rd transition grey-scale range, according to the 9th partial pressure mode When carrying out partial pressure, the number of resistance corresponding to low GTG is more than or equal to the number of resistance corresponding to high gray, and described In 3rd transition grey-scale range:The number of resistance corresponding with the GTG that the 4th grey-scale range is nearest is more than and the described 5th The number of resistance corresponding to the nearest GTG of grey-scale range;

Partial pressure is carried out according to the tenth partial pressure mode in the 4th transition grey-scale range, according to the tenth partial pressure mode When carrying out partial pressure, the number of resistance corresponding to low GTG is more than or equal to the number of resistance corresponding to high gray, and described the In four transition grey-scale ranges:The number of resistance corresponding with the GTG that the 5th grey-scale range is nearest is more than and the described 6th ash The number of resistance corresponding to the nearest GTG of order range.

Why 3rd transition grey-scale range is set between the 4th grey-scale range and the 5th grey-scale range, and Partial pressure is carried out using the 9th partial pressure mode in the 3rd transition grey-scale range, be in order to avoid in the 4th grey-scale range by It is serious according to the 6th partial pressure mode be divided to brightness saltus step when carrying out partial pressure according to the 6th partial pressure mode in the 5th grey-scale range. Similarly, the 4th transition GTG is set between the 5th grey-scale range and the 6th grey-scale range, and the described 4th Partial pressure is carried out using the tenth partial pressure mode in transition grey-scale range, be in order to avoid in the 5th grey-scale range according to the 7th partial pressure It is serious that mode be divided to brightness saltus step when carrying out partial pressure according to the 8th partial pressure mode in the 6th grey-scale range.

For example, so that liquid crystal display panel shows 256 GTGs as an example, the 4th grey-scale range is 0~21 GTG;Institute It is 22~41 GTGs to state the 3rd transition grey-scale range;5th grey-scale range is 42~117 GTGs;The 4th transition GTG For 118~137 GTGs;6th GTG is 138~255 GTGs.

Compared to prior art, timing controller 200 of the invention multiple is tying up a voltage minute by what is received Low GTG can be carried out to more fine partial pressure during pressure, the GTG in low grey-scale range is divided into more sub- GTGs, made The display effect obtained in this grey-scale range is finer and smoother, improves viewing effect when user watches image or video.Enter one Step ground, timing controller of the invention use rough partial pressure to the GTG in the range of high gray, the ash in this grey-scale range The number of gray scale voltage output end 220 is less corresponding to rank.Therefore, timing controller 200 of the invention can not increase always Gray scale voltage output end 220 number, can utilize traditional timing controller framework.

Liquid crystal display device provided by the invention is introduced below, the liquid crystal display device includes foregoing Gamma chip either any one in foregoing timing controller or includes foregoing gamma chip simultaneously And timing controller.Referring to Fig. 4, Fig. 4 is the structure for the liquid crystal display device that a better embodiment of the invention provides Signal.Illustrated in Fig. 4 and carry out liquid crystal display device 10 while including foregoing gamma chip 100 and timing controller (TCON)200.Meanwhile the liquid crystal display device 10 also includes liquid crystal display panel 300.The timing controller 200 Input (tying up a voltage receiving terminal 210) electrically connects with a voltage output end 120 of tying up for the gamma chip 100, for receiving Described to tie up a voltage, the timing controller 200 obtains multiple gray scale voltages for tying up a voltage according to, and by described in Gray scale voltage is supplied to the liquid crystal display panel 300, to cause the liquid crystal display panel 300 to show different GTGs.

The above disclosed power for being only a kind of preferred embodiment of the present invention, the present invention can not being limited with this certainly Sharp scope, one of ordinary skill in the art will appreciate that realizing all or part of flow of above-described embodiment, and weighed according to the present invention Profit requires made equivalent variations, still falls within and invents covered scope.

Claims (11)

1. a kind of gamma chip, it is characterised in that the gamma chip includes a voltage input end and multiple to tie up a voltage defeated Go out end, the voltage receiving terminal is used to receive initial voltage, and the gamma chip is used for receive the voltage input end Initial voltage carry out partial pressure with obtain magnitude of voltage it is mutually different it is multiple tie up a voltage, each tie up a voltage and tie up an electricity by one Output end output is pressed, a voltage of tying up shows the predeterminated voltage-brightness showed during default brightness with liquid crystal display panel Voltage in curve is corresponding, and the gamma chip by the initial voltage received carry out partial pressure when:Corresponding first GTG model Enclose and carry out partial pressure according to the first partial pressure mode and tie up a voltage, corresponding second GTG model to obtain the N number of of corresponding first grey-scale range Enclose and carry out partial pressure according to the second partial pressure mode and tie up a voltage, corresponding 3rd GTG model to obtain the M of corresponding second grey-scale range Enclose and carry out partial pressure according to the 3rd partial pressure mode and tie up a voltage to obtain the P of corresponding 3rd grey-scale range, wherein, first ash GTG in order range is less than the GTG in second grey-scale range, and the GTG in second grey-scale range is less than described the GTG in three grey-scale ranges, the number of resistance corresponding to each GTG is the when carrying out partial pressure according to the first partial pressure mode One preset number, the number of resistance corresponding to each GTG is the second preset number when carrying out partial pressure according to the second partial pressure mode, The number of resistance corresponding to each GTG is the 3rd preset number when carrying out partial pressure according to the 3rd partial pressure mode, described first Preset number is more than second preset number, and first preset number is more than the 3rd preset number, and N, M and P are Positive integer, and N+M+P is equal to preset number.
2. gamma chip as claimed in claim 1, it is characterised in that first grey-scale range, second grey-scale range And the 3rd grey-scale range is three continuous grey-scale ranges.
3. gamma chip as claimed in claim 2, it is characterised in that first preset number is four, and described second is default Number is one, and the 3rd preset number is 0. 5, required resistance when carrying out partial pressure according to the first partial pressure mode For first resistor, the resistance all same of each first resistor.
4. gamma chip as claimed in claim 2, it is characterised in that first preset number is four, and described second is default Number is one, and the 3rd preset number is 0. 5, required resistance when carrying out partial pressure according to the first partial pressure mode For first resistor, in first grey-scale range, in first resistor corresponding to each GTG, the first resistor of neighbouring low GTG Resistance value from resistance value to the first resistor of neighbouring high gray is linearly increasing or linear reduction.
5. gamma chip as claimed in claim 1, it is characterised in that first grey-scale range and second grey-scale range Between include First Transition grey-scale range, between second grey-scale range and the 3rd grey-scale range include the second transition ash Order range, wherein, GTG in the First Transition grey-scale range is more than the GTG in first grey-scale range and described the GTG in one transition grey-scale range is less than the GTG in second grey-scale range, the ash in the second transition grey-scale range Rank is more than the GTG in second grey-scale range and the GTG in the second transition grey-scale range is less than the 3rd GTG GTG in scope;
Partial pressure is carried out according to the 4th partial pressure mode in the First Transition grey-scale range, is carried out according to the 4th partial pressure mode During partial pressure, the number of resistance corresponding to low GTG is more than or equal to the number of resistance corresponding to high gray, and described first In transition grey-scale range:The number of resistance corresponding with the GTG that first grey-scale range is nearest is more than and second GTG The number of resistance corresponding to the nearest GTG of scope;
Partial pressure is carried out according to the 5th partial pressure mode in the second transition grey-scale range, is carried out according to the 5th partial pressure mode During partial pressure, the number of resistance corresponding to low GTG is more than or equal to the number of resistance corresponding to high gray, and in second mistake Cross in grey-scale range:The number of resistance corresponding with the GTG that second grey-scale range is nearest is more than and the 3rd GTG model Enclose the number of resistance corresponding to nearest GTG.
A kind of 6. timing controller, it is characterised in that the timing controller include it is multiple tie up a voltage receiving terminal and Multiple gray scale voltage output ends, each tie up a voltage receiving terminal be used for receive one tie up a voltage, and each tie up a voltage reception What end received ties up that a voltage is different, it is described tie up a voltage shown with liquid crystal display panel showed during default brightness it is pre- If the voltage in voltage-brightness curve is corresponding, and when the timing controller ties up what is received voltage and carry out partial pressure: Corresponding 4th grey-scale range carries out partial pressure to obtain A gray scale voltage of corresponding 4th grey-scale range according to the 6th partial pressure mode, Corresponding 5th grey-scale range carries out partial pressure to obtain B gray scale voltage of corresponding 5th grey-scale range according to the 7th partial pressure mode, Corresponding 6th grey-scale range carries out partial pressure to obtain C gray scale voltage of corresponding 6th grey-scale range according to the 8th partial pressure mode, Wherein, the GTG in the 4th grey-scale range is less than the GTG in the 5th grey-scale range, in the 5th grey-scale range GTG be less than GTG in the 6th grey-scale range, each GTG is corresponding when carrying out partial pressure according to the 6th partial pressure mode The number of resistance be the 4th preset number, the number of resistance corresponding to each GTG when carrying out partial pressure according to the 7th partial pressure mode For the 5th preset number, the number of resistance corresponding to each GTG is the 6th pre- when carrying out partial pressure according to the 8th partial pressure mode If number, the 4th preset number is more than the 5th preset number, and the 4th preset number is pre- more than the described 6th If number, A, B and C are positive integer, and A+B+C is equal to preset number.
7. timing controller as claimed in claim 6, it is characterised in that the 4th grey-scale range, the 5th GTG Scope and the 6th grey-scale range are three continuous grey-scale ranges.
8. timing controller as claimed in claim 7, it is characterised in that the 4th preset number is the four, the described 5th Preset number is one, and the 6th preset number is 0. 5, required when carrying out partial pressure according to the 4th partial pressure mode Resistance is the 4th resistance, the resistance all same of each 4th resistance.
9. timing controller as claimed in claim 7, it is characterised in that the 4th preset number is the four, the described 5th Preset number is one, and the 6th preset number is 0. 5, required when carrying out partial pressure according to the 4th partial pressure mode Resistance is the 4th resistance, in first grey-scale range, in the 4th resistance corresponding to each GTG, and the 4th of neighbouring low GTG the The resistance value of resistance is to the resistance value of the 4th resistance of neighbouring high gray is linearly increasing or linear reduction.
10. timing controller as claimed in claim 6, it is characterised in that the 4th grey-scale range and the described 5th ash Include the 3rd transition grey-scale range between order range, the 4th is included between the 5th grey-scale range and the 6th grey-scale range Transition grey-scale range, wherein, GTG in the 3rd transition grey-scale range be more than the GTG in the 4th grey-scale range and GTG in the 3rd transition grey-scale range is less than the GTG in the 5th grey-scale range, the 4th transition grey-scale range In GTG be more than the GTG in the 5th grey-scale range and GTG in the 4th transition grey-scale range is less than described the GTG in six grey-scale ranges;
Partial pressure is carried out according to the 9th partial pressure mode in the 3rd transition grey-scale range, is carried out according to the 9th partial pressure mode During partial pressure, the number of resistance corresponding to low GTG is more than or equal to the number of resistance corresponding to high gray, and the described 3rd In transition grey-scale range:The number of resistance corresponding with the GTG that the 4th grey-scale range is nearest is more than and the 5th GTG The number of resistance corresponding to the nearest GTG of scope;
Partial pressure is carried out according to the tenth partial pressure mode in the 4th transition grey-scale range, is carried out according to the tenth partial pressure mode During partial pressure, the number of resistance corresponding to low GTG is more than or equal to the number of resistance corresponding to high gray, and in the 4th mistake Cross in grey-scale range:The number of resistance corresponding with the GTG that the 5th grey-scale range is nearest is more than and the 6th GTG model Enclose the number of resistance corresponding to nearest GTG.
11. a kind of liquid crystal display device, it is characterised in that the liquid crystal display device includes such as Claims 1 to 5 any one Described gamma chip or including the timing controller as described in claim 6~10 any one.
CN201711024753.6A 2017-10-27 2017-10-27 Gamma chip, timing controller and liquid crystal display device CN107665689A (en)

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CN101004896A (en) * 2006-01-20 2007-07-25 冲电气工业株式会社 Digital-to-analog converter
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