CN107529669A

CN107529669A - Data output device

Info

Publication number: CN107529669A
Application number: CN201710800743.0A
Authority: CN
Inventors: 铃木真也; 小西健三; 长野英生; 加藤雅弘
Original assignee: CEREBREX Inc
Current assignee: CEREBREX Inc
Priority date: 2016-10-12
Filing date: 2017-09-07
Publication date: 2018-01-02
Anticipated expiration: 2037-09-07
Also published as: KR101820383B1; TWI627473B; TW201814366A; JP2018063332A; CN107529669B; JP6130962B1

Abstract

The present invention is on a kind of data output device for the simulated image data for exporting liquid crystal panel.The setting voltage and setting time that the present invention overdrives by suitably adjusting, to realize that the image quality of liquid crystal panel improves.The data output device (1) of the present invention possesses：Source electrode driver (12), it drives a plurality of source electrode line of display panel；And control unit of overdriving (11), source electrode driver (12) is controlled into the voltage level more than voltage level desired value and overdrived the scheduled time of source electrode line one by it.Control unit (11) of overdriving has：First overdrives setting table (112), its according to present level line and the voltage level of its horizontal view data previous difference, set overdrive voltage and time of overdriving both or one of which；And setting control circuit (116) of overdriving, it is based on first and overdrived setting table (112), and control drives the overdrive voltage of the source electrode line of present level line and overdrived the time.

Description

Data output device

Technical field

The present invention is on a kind of data output device for the simulated image data for exporting liquid crystal panel.Specifically, originally Invention is the circuit engineering minimized on a kind of error of the driving voltage by source electrode driver.

Background technology

In terms of the running gear such as notebook computer or tablet personal computer market, often require that reduce power consumption with reduce into This.On the other hand, as the resolution ratio of panel improves or the image quality of display improves, data processing amount and operating frequency increase increasingly Add, reduce power consumption turns into opposite key subjects with reducing cost.

For the signal of notebook computer or the description data of tablet personal computer flows to liquid crystal panel, first, CPU (Central Processing Unit；CPU) or GPU (Graphics Processing Unit；Graphics process Unit) this processor will carry out describing computing, various calculation process or the graphics process of data in itself.From processor output Plotting is input into time schedule controller (Timing Controller：TCON), now sequence controller carries out liquid crystal panel SECO or image procossing.In addition, the description data from time schedule controller output are input into source electrode driver (Source Driver：SD), this source electrode driver compares the specification of liquid crystal panel and simulation output describes data.

It is time schedule controller and source electrode driver mostly in terms of the running gear such as notebook computer or tablet personal computer market It is separated.For example, as shown in figure 1, in FHD (Full High Definition；Superelevation image quality：1920 × 1080 pixels) panel Situation, need 1 time schedule controller and 4 source electrode drivers mostly.Furthermore in 4K2K panels (close to 4000 × 2000 pictures The panel of the resolution ratio of element) situation, for 1 time schedule controller, need 8 source electrode drivers mostly.Furthermore such as Fig. 1 institutes Show, connect FPC (the Flexible Printed Cable of time schedule controller and source electrode driver；Flexible printing cable) need source The individual quantity of driver, improved with the resolution ratio of panel, parts count increase, the main reason for turning into cost increase.Again Person between time schedule controller and source electrode driver, it is necessary to set interface, but electric power can be consumed by this interface.From this background From the point of view of, the circuit structure shown in Fig. 1 for reduction cost and cuts down the difficult situation of power consumption.

Then, parts count and power consumption are cut down, the time schedule controller such as Fig. 2 and Fig. 3 can be also studied and be driven with source electrode Dynamic device turns into the so-called system drive (TCON+SD) of 1 chip.Fig. 2 shows the construction provided with 2 system drives, Fig. 3 Display system driver is accumulated into the construction of 1.By system drive, parts count is reduced, and can reduce cost.Furthermore Due to the interface between no time schedule controller and source electrode driver, so power consumption can also be reduced.Particularly from reduction by zero The viewpoint of part number and power consumption, as shown in figure 3, system drive is preferably only 1.However, system drive and in the past Source electrode driver it is same, be installed on the glass of liquid crystal panel.Describe data and be directly input into system drive from CPU/GPU Dynamic device, system drive is input into via eDP interfaces or mipi interfaces.

Herein, liquid crystal panel is made up of source electrode line and gate line.The situation of FHD panels, source electrode line need 1920 × 3 (RGB) bar line, gate line need 1080 lines.Source electrode line is the line (data for describing data from source electrode driver simulation output Line), it is spaced apart predetermined interval and parallel to each other distribution.Gate line is that every gate line is gradual when in time displacement The control line of the description data of source electrode line is driven, and is being spaced apart predetermined interval with the orthogonal direction of source electrode line and parallel to each other Ground distribution.Display pixel (picture element) is provided with each crosspoint of gate line and source electrode line.

In addition, source electrode driver or system drive are mounted to so-called COG (the ChipOn the on liquid-crystalline glasses Glass；Glass flip chip) mode is main flow.Such as Fig. 1, when being formed with 4 source electrode drivers, drive needed for 1 source electrode driver COG's is small with linear load, and the difference of most long source electrode line and the wiring lengths of most short source electrode line is also small.So And when being provided only with 1 such as construction of Fig. 3 system drive, the required COG's of driving driver output is each with linear load Level becomes big, and the difference of most long source electrode line and the wiring lengths of most short source electrode line is also to become big.Liquid crystal panel is according to source The voltage level of the analog voltage of the view data of driver output adjusts the brightness of image.Therefore, if source electrode driver Output voltage do not reach voltage level desired value positively, the part that panel will occur is produced in the display such as dark place The problem of.

Fig. 6 shows the pattern with linear load of the source electrode line of liquid crystal panel.Liquid crystal panel is divided into installation source electrode driver Region is fan-out area (Fan out Area) with the pixel arrangement of liquid crystal into the effective coverage (Active Area) of ranks shape. When being provided with several source electrode drivers more, the load of the fan-out area of 1 source electrode driver driving is smaller, but 1 chip is formed When or panel become large-sized, load will become big.

Secondly, Fig. 7 shows the driver' s timing of 1 source electrode line of liquid crystal panel.Load small source electrode line (COG wiring lengths Short line) voltage level desired value is relatively early reached, but load big line (line of COG wiring lengths length) and reach voltage level expectation Value is later.The situation of FHD panels, the time of 1 horizontal line amount is 7.5 μ s (Dual Gate Panel (double grid panel) feelings Condition), so needing to reach voltage level desired value within this time.However, situation about being formed in 1 chip as the aforementioned or face The big situation of board size, due to being become much larger with linear load, so voltage level expectation can not be reached in this driving time by having The possibility of value.

In this way, if panel size becomes big, the load of the source electrode line of panel will become big, and source electrode driver can not be by source sometimes Polar curve drives voltage level desired value in the given time.In addition, if the resolution ratio of panel improves, for driving 1 source electrode The time of line will shorten, so even if the load capacitance of the source electrode line of panel is identical, source electrode driver also can not be by source sometimes Voltage level desired value is arrived in polar curve driving.Furthermore in terms of time schedule controller and source electrode driver turn into the construction of 1 chip, The load capacitance of the source electrode line of panel needed for driving can become big, and source electrode line can not be driven and arrive voltage water by source electrode driver sometimes Flat desired value.It has been observed that the voltage level that liquid crystal panel is the analog voltage of the view data exported according to source electrode driver comes The brightness of image is adjusted, if so the output voltage of source electrode driver does not reach voltage level desired value positively, display Just cause problems.

For this problem, it is known that a kind of so-called " overdriving (Over Drive, OD) " technology, it is in advance with more than electricity Voltage levels desired value voltage level driving source electrode line certain time, with ahead of time reach voltage level desired value time (such as Patent document 1).Fig. 8 and Fig. 9 shows the effect overdrived.Within the time of 1 horizontal line amount, give than the voltage level phase The voltage certain time that prestige value is just over, thereby rising can be made to become precipitous, voltage level desired value can be reached ahead of time Time.Fig. 8 is the waveform when display source electrode line rises, and Fig. 9 is the figure of the waveform when display source electrode line declines.Such as Fig. 8 institutes Show, when source electrode line rises, apply the voltage more slightly higher than voltage level desired value, source electrode line of overdriving.In addition, such as Fig. 9 institutes Show, when source electrode line declines, apply the voltage more slightly lower than voltage level desired value, source electrode line of overdriving.

[prior art document]

Patent document 1：Japanese Patent Laid-Open 2008-9227 publications

The content of the invention

[the problem of invention is to be solved]

But the setting time (overdriving the time) overdrived or setting voltage (overdrive voltage) can be with will overdrive The voltage level desired value of the source electrode line and it is different.For example, as shown in Figure 10, if the voltage level that should be driven is big, crosses and drive Dynamic time or overdrive voltage need first to increase, if the voltage level that should be driven is small, overdrives the time or overdrive on the contrary Voltage needs first to reduce.In this way, when being overdrived, to every source electrode line fine setting overdrive voltage and to overdrive the time, Obtain and determine appropriate setting voltage and setting time.

However, the adjustment of overdrive voltage and time of overdriving inadequately is carried out, if setting time is too short or it sets Voltage is too small, then the effect overdrived will diminish, the time this effect without reaching voltage desired value ahead of time.The opposing party Face, if the setting time overdrived is long or setting voltage is excessive, voltage level desired value can be exceeded, turn into minus effect.Cause This, being applied to the voltage of source electrode line must will make it reach voltage level desired value, to make within the time of 1 horizontal line amount Voltage level is stable, it is necessary to suitably set overdrive time or overdrive voltage.Furthermore overdrive voltage is sometimes from panel Supply voltage scope and the voltage range (gamma voltage) of pixel be fixed into by single such as 0.2V, the situation is only overdrived Voltage turns into adjustable parameter.

In addition, the most long source electrode line for being supported on fan-out area of the source electrode line of liquid crystal panel and most short source electrode line very much not phase Together.The load of most long source electrode line is big, and the load of most short source electrode line is small, so the setting overdrived also requires to make every source electrode line Adjustment.

Furthermore the fan-out area of liquid crystal panel is the region that image is not appeared before one's eyes, so reducing the height (frame) of fan-out area So-called narrow frame panel turn into one of commodity value of panel module.The situation of this narrow frame panel, using making to be fanned out to The close gimmick of the patch bay of the source electrode line in region, in the case, the coupled capacitor effect between source electrode line can become obvious. In addition, situation about being constructed using double-layer wiring, can overlap, and coupled capacitor can increase in different interlayer source electrode lines sometimes. The coupled capacitor increase of adjacent source electrode line if so, then abutting the voltage level of source electrode line will be affected, and has and wanted The time that the voltage level of the source electrode line of driving reaches voltage level desired value produces this so-called interactive interference of variation Influence become obvious situation.

In addition, the source electrode line of liquid crystal panel with linear load can with the variation of manufacturing process and finished product is in minimum smaller (Minimum) side, or significantly finished product in maximum (Maximum) side.The small situation of distribution load capacitance itself, even if during volume production Distribution load change, it can also drive.However, distribution, which is supported on application as the aforementioned, becomes big situation, even if the allusion quotation with volume production The setting overdrived for target of type (Typical) load, if the finished product of liquid crystal panel is deviation in minimum side or maximum Side, then can overdrive the state excessively proved effective or do not proved effective excessively.Therefore, if simply 1 default settings, having to chase after With this problem of the variation of the manufacture deviation of liquid crystal panel.

The present invention completes to solve above-mentioned problem, and its object is to the setting overdrived by suitably adjusting electricity Pressure and setting time, to realize that the image quality of liquid crystal panel improves.Specifically, it is an object of the invention to overcome needed for driving Source electrode line voltage level absolute value change when, liquid crystal panel fan-out area source electrode line wiring lengths deviation it is big When, between adjacent source electrode line occur interactive interference when and in the volume production of liquid crystal panel source electrode line with linear load produce The problem of overdrive technique that at least either case among during deviation is occurred, realize that the image quality of liquid crystal panel improves.

[technological means for solving problem]

The present invention is on a kind of data output device.The data output device system of the present invention is to being configured as line column-shaped Data are described in the display panel output of display pixel.The example of display panel is liquid crystal panel or organic EL panel.

Data output device possesses source electrode driver and control unit of overdriving.Source electrode driver drives a plurality of of display panel Source electrode line.In the present invention, source electrode driver both can be one or more, and can also be integrally formed with time schedule controller And form system drive.In the present invention, from the viewpoint for cutting down parts count and power consumption, particularly preferably for display surface Plate is provided with 1 system drive (Fig. 3 form).Control unit of overdriving controls source electrode driver into more than the voltage level phase The voltage level of prestige value is overdrived the scheduled time of source electrode line one.So-called " voltage level desired value " system is input to source electrode driver Describe the voltage level of data defined, it may be said that be in order to which each source electrode line should be put on to be best suitable for brightness display map Voltage level.Overdrive when each source electrode line, the voltage more than this voltage level desired value is put on into source electrode line.Overdrive When source electrode line rises, apply the voltage higher than voltage level desired value, on the other hand, when source electrode line declines, apply low In the voltage of voltage level desired value.

In the present invention, control unit of overdriving preferably has first to overdrive, and (exporting change correlation is overdrived to be set setting table Determine table).First overdrives difference of the setting table according to present level line and the voltage level of its horizontal view data previous, if Determine both or one of which (table 1 of reference picture 27) of overdrive voltage and time of overdriving.Furthermore so-called " horizontal line " system extension Image line in the direction orthogonal with source electrode line.In display panel, the sequential (state) that voltage puts on certain gate line is tied up to, For with its orthogonal a plurality of source electrode line source electrode driver it is rough simultaneously apply voltage (gradient display voltage), thereby positioned at The display pixel of both intersection points accumulates electric charge, and the horizontal line of image is driven along the gate line.In addition, so-called " before it Horizontal line " system than current horizontal line in time before powered horizontal line, 1 preferably before present level line Horizontal line.Herein, liquid crystal panel is made up of source electrode line and gate line.The situation of FHD panels, source electrode line need 1920 × 3 (RGB) bar line, gate line need 1080 lines.

Moreover, in the present invention, control unit of overdriving further has setting control circuit of overdriving.Setting of overdriving is controlled Circuit processed is overdrived setting table based on first, and control, which corresponds to the overdrive voltage of the source electrode line of present level line driving and crossed, drives The dynamic time.That is, setting control circuit of overdriving is overdrived the control signal overdrived of setting table generation based on first, and this is controlled Signal is supplied to source electrode driver.Control unit of overdriving can also have exporting change correlation overdrive setup algorithm engine.It is defeated Go out the related setup algorithm engine of overdriving of change and compare the view data of present level line and preceding 1 horizontal view data, Detection is output to corresponding to the required voltage level of driving needed for the source electrode line of present level line driving, with reference to driving required electricity Pressure establishes corresponding relation and is preset with the first of appropriate overdrive voltage and time of overdriving and overdrives setting table, determines Being driven with it corresponding overdrive voltage of voltage and to overdrive the time, be communicated to setting control circuit of overdriving.

Be configured as above, the fiducial value based on present level line and its horizontal view data previous and pre-set note Recalling has the table of the appropriate setting voltage overdrived and setting time, and setting control circuit of overdriving controls source electrode with reference to this table Driver, each source electrode line of overdriving.Thereby, even the absolute value of the voltage level of source electrode line necessary to horizontal driving becomes Dynamic situation, the setting voltage overdrived and setting time can also be dynamically adjusted, the image quality that liquid crystal panel can be achieved improves.

Furthermore the data output device on the present invention is further equipped with self-recision circuit of overdriving.Overdrive self Amendment circuit is to correct the circuit of the overdrive voltage caused by control unit of overdriving and time of overdriving.In the present invention, Self-recision circuit of overdriving has comparator (analog voltage comparator) and setting amendment circuit of overdriving.Comparator compared Overdriving caused by drive control part terminates the voltage of the output voltage under time point from source electrode driver and the source electrode driver Horizontal desired value.Setting amendment circuit overdrive based on the output valve from comparator, will be correcting overdrive voltage and mistake The control signal of driving time setting is output to control unit of overdriving.

It is configured as above, is overdrived self-recision circuit by setting, when the volume production of liquid crystal panel, even source electrode line The situation that deviation is produced with linear load, overdriving caused by control unit of overdriving can also be suitably corrected to every source electrode line Control.

In the present invention, control unit of overdriving preferably has second to overdrive, and setting table (overdrive by panel load correlation Set table).Second overdrives setting table according to the resistance of source electrode line and both or one of which of electric capacity, sets overdrive voltage And both or the one of which (table 3 of reference picture 29) for time of overdriving.In this situation, setting control circuit of overdriving is preferably base Overdrive and setting table and second overdrive setting table in first, to every source electrode line traffic control overdrive voltage and overdrive the time. However, control unit of overdriving both can possess this together and second overdrive setting table with the foregoing first setting table of overdriving, Can possess this and second overdrive setting table to replace first to overdrive setting table.

It is configured as above, memory is pre-set according to the resistance and/or electric capacity of each source electrode line appropriate overdrive Voltage and the table of setting time are set, setting control circuit of overdriving controls source electrode driver with reference to this table, each source of overdriving Polar curve.Thereby, can also be to every source electrode even the wiring lengths deviation of the source electrode line of the fan-out area of liquid crystal panel is big Line suitably adjusts the setting voltage overdrived and setting time, and the image quality that liquid crystal panel can be achieved improves.

In the present invention, setting control circuit of overdriving is preferably only to the benchmark source electrode of the part in a plurality of source electrode line Line determines overdrive voltage and overdrived the time.In this situation, setting control circuit of overdriving further has linear compensation electricity Road.Linear compensation circuit is based on the overdrive voltage determined to benchmark source electrode line and overdrives the time, is determined by linear compensation Overdrive voltage to the source electrode line beyond benchmark source electrode line and overdrive the time.

It is configured as above, by linear compensation circuit is set, setting control circuit of overdriving is only in a plurality of source electrode line The benchmark source electrode line of a part determines overdrive voltage and overdrived the time.Thereby, such as between benchmark source electrode line In the group of source electrode line, the deviation for the setting voltage and setting time overdrived can be suppressed between source electrode line.In addition, to more Each source electrode line of bar source electrode line determines individually setting voltage and the setting time overdrived, then can cause the big of whole circuit scale Type, but as described above, by setting linear compensation circuit, so that it may the maximization of suppression circuit scale.

In the present invention, setting control circuit of overdriving preferably has the 3rd to overdrive, and (abutment line interaction is dry for setting table Disturb correlation to overdrive setting table).3rd overdrive setting table according to this that to be overdrived source electrode line with and its abut source electrode line Voltage change difference, set both or the one of which (table 2 of reference picture 28) of overdrive voltage and time of overdriving.Herein Situation, overdrive setting control circuit be preferably based on first overdrive setting table, second overdrive setting table and the 3rd cross drive Dynamic setting table, to every source electrode line traffic control overdrive voltage and overdrives the time.Furthermore so-called " adjacent source electrode line ", at least It is the left adjacent or right adjacent source electrode line of either one of this that to be overdrived source electrode line.However, it is also possible to will overdrive The relation of the source electrode line and its two adjacent source electrode line is pre-set in the 3rd and overdrived on setting table.In addition, control unit of overdriving Both can all with first overdrive setting table, second overdrive and setting table and the 3rd overdrive setting table, it is possible to have 1 or 2 among these 3 tables.

Above-mentioned construction, memory is pre-set according to the difference of the adjacent mutual voltage change of source electrode line appropriate mistake The setting voltage of driving and the table of setting time, setting control circuit of overdriving control source electrode driver with reference to this table, cross and drive Move each source electrode line.Thereby, in terms of narrow frame panel, even the situation of interactive interference occurs between adjacent source electrode line, It is contemplated that the influence of its interactive interference and the setting voltage overdrived and setting time are suitably adjusted to every source electrode line, can Realize that the image quality of liquid crystal panel improves.

[the effect of control prior art]

It has been observed that according to the present invention, setting voltage and the setting time overdrived are adjusted by, liquid crystal panel can be achieved Image quality improves.

Brief description of the drawings

Fig. 1 is the block diagram that the display module that display time schedule controller separates with source electrode driver entirely constructs.

Fig. 2 is to show that the display module for possessing 2 time schedule controller system drives integrated with source electrode driver is whole The block diagram of individual construction.

Fig. 3 is the display module that display only possesses 1 time schedule controller system drive integrated with source electrode driver The block diagram entirely constructed.

Fig. 4 be shown in the fan-out area of liquid crystal panel in the display module that time schedule controller separates with source electrode driver with The figure of the source electrode line distribution of effective coverage.

Fig. 5 is the fan-out area for being shown in liquid crystal panel in the time schedule controller display module integrated with source electrode driver With the figure of the source electrode line distribution of effective coverage.

Fig. 6 is to show the figure of the wiring resistance of the source electrode line distribution of liquid crystal panel and distribution capacitance profile.

Fig. 7 is to illustrate how the voltage of source electrode line changes with the distribution load of the source electrode line of liquid crystal panel Figure.

The figure of effect of overdriving when Fig. 8 is to illustrate that source electrode line rises.

The figure of effect of overdriving when Fig. 9 is to illustrate that source electrode line declines.

Figure 10 is needs to change the figure of setting of overdriving to be shown as voltage level.

Figure 11 is the block diagram that display entirely constructs on the data output device of the present invention.

Figure 12 is the block diagram for showing control cage structure of overdriving.

Figure 13 is the block diagram for showing the setting control circuit construction of overdriving in control unit of overdriving.

Figure 14 is to illustrate the figure without control sequential when overdriving.

Figure 15 is to illustrate to have the figure of control sequential when overdriving.

Figure 16 is to the setting for illustrating to overdrive and the figure of the output waveform of source electrode line.

Figure 17 is to illustrate the rgb value of liquid crystal panel and analog output voltage relation (so-called gain curve characteristic) Figure.

Figure 18 is to illustrate that the figure of the calculation formula for time of overdriving is obtained in setting when considering the table of panel load.

Figure 19 be the fan-out area and effective coverage that are shown in liquid crystal panel source electrode line distribution in every source electrode line distribution Load different figures.

Figure 20 be to illustrate because every source electrode line is different with linear load and every source electrode line needs change to overdrive setting Figure.

Figure 21 is to be overdrived to illustrate that if the load of the source electrode line when the volume production of panel is fixed in the case of deviation occurs The arrival voltage of setting then source electrode line the figure of deviation can also occur.

Figure 22 is to illustrate to correspond to the inclined of load in the case that deviation occurs for the load of source electrode line when the volume production of panel The figure of method that is poor and correcting setting of overdriving.

Figure 23 is to be overdrived to illustrate that if the load of the source electrode line when the volume production of panel is fixed in the case of deviation occurs Setting then source electrode line the figure that can change with the deviation of load of output current.

Figure 24 is to illustrate to correspond to the inclined of load in the case that deviation occurs for the load of source electrode line when the volume production of panel The figure of method that is poor and correcting setting of overdriving.

Figure 25 is the block diagram of self-recision circuit of overdriving.

Figure 26 is to illustrate the figure of the affected interactive interference movement of adjacent source electrode line.

Figure 27 is the table (table 1) of the example of the related setup algorithm table of overdriving of display output change.

Figure 28 be display interactive interference correlation overdrive setup algorithm table example table (table 2).

Figure 29 be display source electrode line with linear load correlation overdrive setup algorithm table example table (table 3).

Embodiment

Hereinafter, using schema, the form for just implementing the present invention illustrates.The present invention is not by form described below Restriction person, also comprising those of ordinary skill in the art from following form in apparent scope it is appropriate Change.

[essential structure of data output device]

Figure 11 is block diagram of the display on the preferred configuration of the data output device 1 of the present invention.Number on the present invention It is the integrated circuit on the display panel that can be loaded into representated by liquid crystal panel or organic EL panel etc. according to output device 1.On The data output device 1 of the present invention is in terms of such as notebook computer or tablet personal computer, to export analog image to display panel The circuit of data, the voltage error for exporting interchannel can be minimized.

Display panel typically has source electrode line, gate line and display pixel.Source electrode line is with the panel base of the compositions such as glass On plate, it is spaced apart predetermined interval and is provided with parallel to each other a plurality of.Gate line on identical display panel substrate, along and source electrode line Orthogonal direction, it is spaced apart predetermined interval and is provided with parallel to each other a plurality of.Display pixel is each located at source electrode line and gate line On crosspoint.TFT (ThinFilm Transistor as switch module；Thin film transistor (TFT)) it is connected to each display pixel.Example Such as, the situation of FHD liquid crystal panel, source electrode line need 1920 × 3 (RGB) bar lines, and gate line needs 1080 lines.

Data output device 1 at least possesses the source electrode driver 12 for the source electrode line for driving display.Source electrode driver 12 are connected to a plurality of source electrode line, apply driving voltage (gradient display voltage) and give each source electrode line.Source electrode driver 12 can be located at With on the display panel substrate of the compositions such as glass.Although data output device 1 can possess multiple source electrode drivers for 1 display 12, but be preferably only 1 source electrode driver 12 for 1 display from the viewpoint for cutting down parts count and power consumption.This Outside, although schema is omitted, data output device 1 can also possess the gate drivers of the gate line of driving display.However, The data output device 1 of the present invention is not equipped with necessity of gate drivers.Gate drivers apply to turn on TFT's successively Scanning signal gives each gate line.Using gate drivers apply operation signal to gate line and TFT turn into conducting state when, if Apply driving voltage to source electrode line from source electrode driver 12, then the display group that electric charge can be lodged on these line intersection points Part.Therefore, the light transmittance of display module can change with the driving voltage for putting on source electrode line, carry out via display module Image is shown.In addition, source electrode driver 12 has the function for each source electrode line of overdriving.It has been observed that function of overdriving is as after Function：In advance to drive source electrode line certain time more than the voltage level of voltage level desired value, to reach voltage level ahead of time The time of desired value.

As shown in figure 11, the setting of overdriving that data output device 1 possesses to control source electrode driver 12 is overdrived Control unit 11.In the present invention, overdriving control unit 11 can be for each source of a plurality of source electrode line combined with source electrode driver 12 Polar curve, determine appropriate overdrive voltage and the setting for time of overdriving (only can also say " setting of overdriving " below).By mistake The setting of overdriving of the decision of drive control part 11 is used as control signal, is input into source electrode driver 12.Source electrode driver 12 is pressed The control signal of place input like this, control the overdrive voltage of each source electrode line and overdrive the time.

In addition, as shown in figure 11, the data output device 1 of preferred configuration has self-recision circuit 13 of overdriving.Cross drive Dynamic self-recision circuit 13 is for the circuit after such as：Compare should put on the voltage level desired value of each source electrode line with it is actual from What source electrode driver 12 put on source electrode line attaches the driving voltage overdrived, and when both have deviation, its correction value is fed back To control unit 11 of overdriving.

Hereinafter, each key element of the data output device 1 on the present invention is just formed, it is detailed with reference to the embodiment of the present invention Carefully illustrate.

[first embodiment of the invention]

Hereby just the first embodiment of the present invention illustrates.The first embodiment of the present invention possesses the number shown in Figure 11 According to overdrive control unit 11 and the source electrode driver 12 among the inscape of output device 1.Furthermore first in the present invention is real Apply in form, control unit 11 of overdriving is overdrived in terms of setting by the exporting change correlation among the detailed inscape shown in Figure 12 The setting table of overdriving (first overdrive setting table) 112 of calculate engine 111, combining closely with this engine 111 and overdriving is set Determine control circuit 116 to form.

Exporting change correlation overdrives setup algorithm engine 111 as according to present level line and its horizontal output previous Change, determine the computing circuit of the setting of overdriving of each source electrode line.Specifically, exporting change correlation setup algorithm of overdriving draws The voltage level of 111 view data for comparing present level line and the voltage level of preceding 1 horizontal view data are held up, from two Voltage level necessary to the driving of the difference detection present level line of voltage level.

On the other hand, display is related to exporting change in Figure 27 table 1 overdrives what setup algorithm engine 111 was combined closely Overdrive one of setting table 112.Setting table 112 of overdriving is according to each source electrode being output to corresponding to the driving of present level line The required voltage of driving needed for line, determines appropriate overdrive voltage and the table for time of overdriving.Overdrive the system of setting table 112 by Constructed by ROM or buffer etc..In the example shown in Figure 27, overdrive on setting table 112, according to the image of present level line The voltage level of data, the voltage level of preceding 1 horizontal view data and obtained from the difference of two voltage levels current The required voltage level of horizontal driving, is preset with the overdrive voltage that should put on source electrode line and overdrives the time.In That exporting change correlation overdrives setup algorithm engine 111 with reference to this setting table 112 of overdriving, for each source electrode line, determine with It drives the required corresponding overdrive voltage of voltage and overdrived the time.

For example, in the example shown in Figure 27, overdrive on setting table 112, in 0~255 horizontal scope, according to The voltage level (V (t)) of present level line, preceding 1 horizontal voltage level (V (t-1)) and the electricity from present level line The relation of the value (V (t)-V (t-1)) of 1 horizontal voltage level, is logged in appropriate overdrive voltage before voltage levels deduct With the time of overdriving.Exporting change correlation overdrive setup algorithm engine 111 detect present level line voltage level and preceding 1 The horizontal voltage level of bar, electricity of overdriving corresponding with the difference of these voltage levels is read from this setting table 112 of overdriving Press and overdrive the time.Furthermore in figure 27, although representing overdrive voltage and time, actual table with A~E mark On can arbitrarily log in most suitable overdrive voltage and the value of time of overdriving.Consequently, it is possible to exporting change correlation is overdrived and set Determine computing engines 111 with reference to setting table 112 of overdriving, determine to be output to corresponding to the driving of present level line each source electrode line most Suitable overdrive voltage is with overdriving the time.The value that this place determines is overdrived setup algorithm engine from exporting change correlation 111 are output to setting control circuit 116 of overdriving.

Herein, overdrive one of the action of setup algorithm engine 111 of exporting change correlation is illustrated.Figure 16 is shown The voltage waveform overdrived.First, in figure 16, the engine 111 obtains V (T_D)=V_TT_DValue.In figure 16, V_DFor mistake Driving voltage, V_TFor voltage level desired value (target voltage), V₀When open for grid (at the beginning of during 1 horizontal line) Initial voltage.T_DFor the end time for time of overdriving, T_GThe sequential (end time during 1 horizontal line) that close for grid. Therefore, V (T_D) for the voltage at the end of overdriving, V (T_G) the last arrival voltage of time point that closes for grid.If 0≤t ＜ T_DCondition, then the engine 111 obtain following V (t) from the calculation formula of the transient response of in general RC serial circuits：

If substitute into t=T_D, then it is as follows：

If in addition, obtain T_DRequired clock periodicity N_CLK, then it is as follows：

Herein, RC matches somebody with somebody linear load, T for the source electrode line of panel_CLKFor the clock cycle of circuit, RC/T_CLKFor from panel Load the coefficient of the every source electrode line determined.

The RGB digital image datas of liquid crystal panel are not linear relations with the analog rgb data from source electrode driver output, But the curved line relation for being referred to as gamma curve shown in Figure 17.For example, target voltage V_TFor the value of Figure 17 longitudinal axis.Above-mentioned formula Ln (︱ V_D-V₀︱-ln (︱ V_D-V_TIt is ︱) item determined by the voltage change of 1 horizontal line to present level line in the past, with defeated Go out to change correlation setup algorithm engine 111 of overdriving to obtain.Herein, by ln (V_D- V) formula setting table of overdriving is made in advance 112.V herein is V₀、V_TEtc. obtainable all magnitudes of voltage.V is added from this table_D、V₀、V_TValue, calculate ln (︱ V_D-V₀︱-ln (︱ V_D-V_T︱).When (tr) is with declining when the output voltage of source electrode line rises (tf), this value is different, so table needs two kinds.Figure 27 Table 1 for display source electrode line output voltage rise when example table.In addition, calculate ln (︱ V_D-V₀︱-ln (︱ V_D-V_T︱) it Border, in order to be easily processed calculated value on circuit, (K can also be multiplied by₁× ln (︱ V_D-V₀︱)+K₂)-(K₁× ln (︱ V_D-V_T︱)+ K₂) etc. coefficient and form.

The overdrive voltage so determined and time of overdriving are overdrived setup algorithm engine 111 from exporting change correlation It is communicated to setting control circuit 116 of overdriving.Setting control circuit 116 of overdriving controls into source electrode driver 12 puts to death herein Between the fixed time of overdriving, its source electrode driver 12 makes overdrive voltage be output to each source electrode line after being overlapped with view data. Its waveform overdrived such as Fig. 8 and Fig. 9.Or it can also carry out present level line as Figure 27 table 1 and first 1 horizontal Current potential compares, according to its poor current potential come the setting that determines to overdrive.The setting intensity overdrived is set to the suitable of A ＞ B ＞ C ＞ D ＞ E Sequence, A is maximum and E is minimum.This value is previously added setting table 112 of overdriving.

In addition, Figure 14 displays are without control sequential when overdriving.In fig. 14,1 level is represented with horizontal-drive signal The paragraph of line, the pulse signal that signal starts is represented with STB, the output signal of source electrode line is represented with Sout, with G1, G2, G3 ... represents signal.In the example shown in Figure 14, due to not overdrived, and the source electrode for being input to source electrode line is learnt The voltage of signal does not reach voltage level desired value.

On the other hand, Figure 15 shows control sequential figure when overdriving.In fig.15, in addition to Figure 14 display, also with Setting signal of overdriving when ODH [n] represents to rise, the setting signal of overdriving when representing to decline with ODL [n].In Figure 15 institutes In the example shown, due to being overdrived, and learn the voltage for the source signal for being input to source electrode line and reach voltage level Desired value.

[the second embodiment of the invention]

Hereby just the second embodiment of the present invention illustrates.Second embodiment is being further equipped with panel load correlation Overdrive setting table 115 point and first embodiment it is different.That is, the second embodiment of the invention possesses the number shown in Figure 11 According to overdrive control unit 11 and the source electrode driver 12 among the inscape of output device 1.Furthermore second in the present invention is real Apply in form, control unit 11 of overdriving is overdrived in terms of setting by the exporting change correlation among the detailed inscape shown in Figure 12 Calculate engine 111, related to setting table of overdriving that this engine 111 is combined closely (first overdrive setting table) 112, panel load Overdrive setting table (second overdrive setting table) 115 and setting control circuit 116 of overdriving is formed.Set in addition, overdriving Determine control circuit 116 to set with overdriving with the related reflection circuit 1163 of panel load among the detailed inscape shown in Figure 13 Determine decision-making circuit 1164 to form.

Exporting change correlation overdrive setup algorithm engine 111 and foregoing first embodiment it is same, more current water The view data of horizontal line and preceding 1 horizontal view data, detection are output to the source electrode line corresponding to the driving of present level line The required voltage level of required driving, Voltage Establishment corresponding relation and appropriate overdrive must be preset with reference to driving Voltage and the setting table 112 of overdriving for time of overdriving, determine to drive the corresponding overdrive voltage of required voltage with it and cross drive The dynamic time, it is communicated to setting control circuit 116 of overdriving.

Control unit 11 of overdriving further there is panel load correlation to overdrive setting table 115.Related cross of panel load is driven Dynamic setting table 115 determines appropriate electricity of overdriving to consider the influence with linear load of display panel (particularly fan-out area) Press and overdrive the table of time.Panel load correlation is overdrived on setting table 115, according to the resistance of source electrode line and the two of electric capacity or One of which, set both or one of which of overdrive voltage and time of overdriving.Preferably on this table 115, according to source electrode The resistance and capacitance settings of line have overdrive voltage and overdrived the time.That is, by the fan-out area and effective coverage of display panel Each source electrode line be pre-set in the panel load correlation constructed with ROM or buffer with linear load and overdrive setting table 115 On.Then, overdrive and set control circuit 116 when determining overdrive voltage corresponding with driving required voltage with the time, Come according to every source electrode line with reference to this table 115 individually, read corresponding to appropriate overdrive voltage of the source electrode line with linear load and Overdrive the time.

In this embodiment, setting control circuit 116 of overdriving can further have the related reflection electricity of panel load Road 1163 and setting decision-making circuit 1164 of overdriving.The related reflection circuit 1163 of panel load is that panel load correlation is overdrived The table setting value of setup algorithm table is reflected in the electricity on the calculated value that exporting change correlation is overdrived obtained by setup algorithm engine 111 Road.As shown in figure 13, consider to overdrive from exporting change correlation for related reflection circuit 1163 input of panel load and set meter The setting of overdriving (voltage and time) for the horizontal line exporting change that engine 111 exports is calculated, while is inputted related from panel load The setting of overdriving (voltage and time) that setting table 115 of overdriving is read.The related reflection circuit 1163 of panel load is for these Calculating that two settings of overdriving (voltage and time) are weighted etc., 1 setting of overdriving (voltage and time) is obtained, exported To setting decision-making circuit 1164 of overdriving.Setting decision-making circuit 1164 of overdriving is used with the related reflection circuit 1163 of panel load The setting value of the setting of overdriving (voltage and time) determined, determine last overdrive voltage and to overdrive the time, will be on The control signal overdrived passes out to source electrode driver 12.

Figure 19 shows the wiring diagram of the fan-out area of liquid crystal panel and the source electrode line of effective coverage.Positioned at the source at panel both ends Wiring lengths of the polar curve in fan-out area are most long.Therefore, the linear load of matching somebody with somebody positioned at the source electrode line at panel both ends becomes big.The opposing party Face, wiring lengths of the source electrode line in fan-out area positioned at face plate center side are short, so also diminishing with linear load.On the other hand, In the effective coverage of liquid crystal panel, the wiring lengths of whole source electrode lines are all identical.Therefore, the distribution of the source electrode line of effective coverage is born Carry all identical.So as to which source electrode line and the relation for setting of overdriving are as shown in figure 20.That is, for positioned at panel both ends, distribution Big source electrode line is loaded, it is necessary to increase setting of overdriving (voltage and time), for positioned at face plate center side, small with linear load Source electrode line is, it is necessary to reduce setting of overdriving (voltage and time).Therefore, as the second embodiment, every source electrode line are born from panel Carry correlation overdrive setting table 115 read with each source electrode line with the corresponding appropriate overdrive voltage of linear load with overdriving when Between, determine setting of overdriving by every source electrode line, make to put on the driving voltage of each source electrode line 1 horizontal line time it Between positively reach voltage level desired value, can be stabilized it in its level.

Overdrived setting table 115 on panel load correlation, lift the shape knot of the source electrode line of liquid crystal panel shown in Figure 19 Exemplified by structure, corresponding relation will be established with wiring resistance and distribution electric capacity and record the table for having setting of overdriving it is shown in Figure 29 table 3.The top of table shows the source electrode line positioned at the most edge of liquid crystal panel or so, wiring resistance and distribution electric capacity maximum.With Gone below toward table, turn into the source electrode line positioned at liquid crystal panel central side, wiring resistance tapers into distribution electric capacity.Wired electric The product of resistance and distribution electric capacity is that RC value turns into time constant (sec), turns into the value for representing distribution loading level.According to this distribution The value of load, overdrive voltage and time of overdriving can be preset into such as A ＞ B ＞ C ＞ D ＞ E order, and (A is maximum and E It is minimum) etc..

Or the coefficient of every source electrode line of consideration is RC (ch)/T_UNIT.RC (ch) is every source electrode line (channel) of expression Distribution electric capacity and wiring resistance product value.As shown in figure 18, T_UNITFor the unit for time of overdriving.If shorten T_UNIT, then it is smart Degree can improve, but circuit scale can increase.Figure 18 is shown for such as 1 horizontal line time 6.4 μ s, T_UNIT=0.8 μ s' Example, due to 6.4 μ s/0.8 μ s=8step, so its digit needs 3.Panel load correlation is just made in advance overdrives and set For the example for determining table 115, such as every 96 lines (ch), if 30step, T_UNIT=120ns, then obtain as follows RC (ch)/ T_UNITValue.The value tried to achieve herein is logged in into panel load correlation to overdrive on setting table 115, can also be reflected in and overdrive In the result of calculation for setting decision-making circuit 1164.

In the second embodiment, overdrived setting table 112 and base using based on first set by exporting change correlation Overdrived setting table 115 in second set by panel load correlation.Control circuit 116 is set from each table it has been observed that overdriving 112nd, 115 setting (overdrive voltage and time) of overdriving is read, is used in the control of source electrode driver 12.Now, overdrive Setting control circuit 116 with overdrive setting decision-making circuit 1164, based on from first overdrive setting table 112 reading overdrive The setting of overdriving of setting and the reading of setting table 115 of being overdrived from second, carries out predetermined weighted calculation etc., to every source electrode line Determine 1 setting of overdriving (overdrive voltage and time).The algorithm of the weighting of the setting of overdriving read from each table 112,115 Etc. can arbitrarily adjust.

[the 3rd embodiment of the invention]

The 3rd embodiment of the present invention is illustrated.3rd embodiment is the improvement of above-mentioned second embodiment Example, in addition to the above construction, further has linear compensation circuit 1161.That is, the 3rd embodiment of the invention possesses Overdrive control unit 11 and source electrode driver 12 among the inscape of data output device 1 shown in Figure 11.Furthermore at this In 3rd embodiment of invention, overdrive control unit 11 with exporting change correlation overdrive setup algorithm engine 111, draw with this Hold up the 111 setting tables of overdriving combined closely (first overdrive setting table) 112, panel load correlation is overdrived setting table ( Two overdrive setting table) 115 and setting control circuit 116 of overdriving form.In addition, overdrive setting control circuit 116 with The related reflection circuit 1163 of the linear compensation circuit 1161 among detailed inscape, panel load and mistake shown in Figure 13 Driving setting decision-making circuit 1164 is formed.

It has been observed that for all source electrode lines of display panel, individual settings overdrive voltage and can also overdrive the time. If however, all adjusting setting of overdriving for all source electrode lines, the expansion of circuit scale can be caused.Then, implement the 3rd In form, in order to cut down circuit scale, setting control circuit 116 of overdriving is only for a part of source electrode line in a plurality of source electrode line (benchmark source electrode line), determine overdrive voltage and overdrive the time.That is, setting control circuit 116 is overdrived only for a reference source Polar curve, read appropriate overdrive voltage from each table 112,115 and overdrive the time.Moreover, setting control circuit 116 of overdriving With linear compensation circuit 1161, based on the overdrive voltage determined for benchmark source electrode line and overdrive the time, mended using linear Decision is repaid for the overdrive voltage of other source electrode lines and is overdrived the time.

Figure 20 shows the concrete example of linear compensation.As shown in figure 20, a plurality of source electrode line for forming display is divided into necessarily Group.The source electrode line (Channel) as group's benchmark is represented with circular mark.Turn between circle mark and circular mark 1 group.For benchmark source electrode line, read appropriate overdrive voltage from each table 112,115 and overdrive the time.Linear compensation Circuit 1161 for other source electrode lines between benchmark source electrode line, carry out overdrive voltage based on benchmark source electrode line and The linear compensation of time determines overdrive voltage and time.Thereby, for the source electrode line beyond benchmark source electrode line, can also determine Determine overdrive voltage and time.In this way, carrying out setting of overdriving by with linear compensation, can suppress between the source electrode line in group The deviation of setting, and circuit scale can be cut down.

[the 4th embodiment of the invention]

The 4th embodiment of the present invention is illustrated.4th embodiment is that above-mentioned 3rd embodiment is further Improvement example, in addition to the above construction, further have abutment line interactive interference correlation and overdrive setup algorithm engine 113 and the setting table 114 of overdriving combined closely with this engine 113.That is, the 4th embodiment of the invention possesses Figure 11 Overdrive control unit 11 and source electrode driver 12 among the inscape of shown data output device 1.Furthermore in the present invention The 4th embodiment in, overdrive control unit 11 with exporting change correlation overdrive setup algorithm engine 111, with this engine The 111 setting tables of overdriving combined closely (first overdrive setting table) 112, panel load correlation are overdrived setting table (second Overdrive setting table) 115, abutment line interactive interference correlation overdrive setup algorithm engine 113, combine closely with this engine 113 Setting table 114 of overdriving (the 3rd overdrive setting table) and setting control circuit 116 of overdriving form.In addition, overdrive It is related anti-with the linear compensation circuit 1161 among the detailed inscape shown in Figure 13, interactive interference to set control circuit 116 Reflect the related reflection circuit 1163 of circuit 1162, panel load and setting decision-making circuit 1164 of overdriving is formed.

Setting table 114 of overdriving influence of caused interactive interference between the adjacent source electrode line of consideration determines appropriate Overdrive voltage and the table for time of overdriving.Overdrive setting table 114 according to this that to be overdrived source electrode line and with its adjoining The difference of the voltage change of source electrode line, set both or one of which of overdrive voltage and time of overdriving.Overdrive setting The example of table 114 is shown in Figure 28 table 2.

Figure 26 shows the example of the movement of the interactive interference of abutment line.If watch source electrode line N (this that to be overdrived source electrodes attentively Line), then source electrode line N-1 and source electrode line N+1 is present in its source electrode line N physically two neighbours.Because liquid crystal panel is in fanout area The patch bay of the source electrode line in domain is narrow, so parasitic coupling capacitance is present between source electrode line, it is expressed as in fig. 26 Ccoupling.When source electrode line N carries out identical potential change with its two adjacent source electrode line N-1, N+1, such as 3 all sources The current potential of polar curve all from low (Low) level be converted to high (High) it is horizontal when, source electrode line N does not have the influence of interactive interference.However, During the source electrode line N potential changes different from its two adjacent source electrode line N-1, N+1 progress, such as source electrode line N is converted to from low-level When high-level, two adjacent source electrode line N-1, N+1 from reverse high level be converted to low-level when, it is dry that interaction can occur for source electrode line N The influence disturbed.Interactive interference caused by this source electrode line N is that parasitic coupling capacitance value is bigger or voltage change (transformation current potential) Difference it is bigger, will be more obvious.

Then, as shown in figure 28, with the voltage change of this that to be overdrived source electrode line and with the source electrode line of its adjoining The difference of voltage change establishes corresponding relation, and appropriate overdrive voltage is pre-set in overdrive with the time of overdriving and set Determine on table 114.Furthermore so-called " adjacent source electrode line ", for left adjacent or right adjacent either one of this that to be overdrived source electrode line The adjacent source electrode line of the source electrode line source electrode line two that can or be overdrived.In the example shown in Figure 28, appropriate mistake Voltage change [(i) V of driving voltage and overdrive time system and this that to be overdrived source electrode line_n(t)-V_n(t-1)] and and its Voltage change [(ii) V of adjacent source electrode line_n+l(t)-V_n+lOr V (t-1)_n-l(t)-V_n-l(t-1)] difference [︱ (i)- (ii) ︱] establish corresponding relation.The voltage mark of abutment line in table+expression this that to be overdrived source electrode line V_nWith abutment line (V_n-1Or V_n+1) toward same direction electric voltage displacement when.Voltage mark-expression this that to be overdrived source electrode line V_nWith abutment line (V_n-1Or V_n+1) toward opposite direction electric voltage displacement when (V_nAs during high side and when abutment line turns into downside etc.).Voltage is remembered Number-when, the influence of interactive interference is big.The setting intensity overdrived is set to A ＞ B ＞ C ＞ D ＞ E order, and A is maximum and E is minimum. This value can be previously added to setting table 114 of overdriving.

Abutment line interactive interference correlation overdrives setup algorithm engine 113 for each source electrode line, and what detection to be overdrived should The voltage change of source electrode line (N) and the voltage change with the source electrode line (N-1 or N+1) of its adjoining, calculate the difference of its grade Value, based on the difference of resulting voltage change, with reference to setting table 114 of overdriving, read from this table 114 and correspond to voltage change The overdrive voltage of the difference of change value is with overdriving the time.Thereby, abutment line interactive interference correlation is overdrived setup algorithm engine 113 are contemplated that the influence of caused interactive interference between adjacent source electrode line, determine appropriate overdrive voltage and overdrive Time.Abutment line interactive interference correlation overdrives setup algorithm engine 113 by the overdrive voltage determined herein and when overdriving Between be communicated to setting control circuit 116 of overdriving, this setting control circuit 116 of overdriving be based on these voltages and time, crosses drive Dynamic source electrode driver 12.

As shown in figure 13, setting control circuit 116 of overdriving has the related reflection of linear compensation circuit 1161, interactive interference The related reflection circuit 1163 of circuit 1162, panel load and setting decision-making circuit 1164 of overdriving.The related reflection of interactive interference Circuit 1162 is that will abut against the result of calculation that line interactive interference correlation is overdrived obtained by setup algorithm engine 113 to be reflected in output change Change the circuit on the calculated value that correlation is overdrived obtained by setup algorithm engine 111.In addition, the related reflection circuit 1163 of panel load For the overdrive table setting value of setup algorithm table of panel load correlation to be reflected in exporting change correlation setup algorithm of overdriving and draws Hold up the circuit on the calculated value of 111 gained.Setting decision-making circuit 1164 of overdriving is the circuit as after：Based on from interactive interference The output valve of correlation reflection circuit 1162 and the output valve from the related reflection circuit 1163 of panel load, determine last drive Dynamic voltage will pass out to source electrode driver 12 with overdriving the time on the control signal overdrived.

As shown in figure 13, it is defeated via foregoing linear compensation circuit 1161 for the related reflection circuit 1162 of interactive interference Enter consider from exporting change correlation overdrive setup algorithm engine 111 output horizontal exporting change setting of overdriving (voltage and time：VOD_Xch(a)[M:0] and TOD_Xch(a)[M:0]), while consideration is inputted from the related drive excessively of abutment line interactive interference The interactive interference of the dynamic output of setup algorithm engine 113 is overdrived setting (voltage and time：VOD_Xch(b)[M:0] and TOD_Xch(b) [M:0]).In the related reflection circuit 1162 of interactive interference, it is weighted for these two settings of overdriving (voltage and time) Calculating etc., obtain 1 and overdrive setting (voltage and time：VOD_Xch(d)[M:0] and TOD_Xch(d)[M:0]), it was output to drive Dynamic setting decision-making circuit 1164.In addition, for the related reflection circuit 1163 of panel load, via foregoing linear compensation circuit 1161 inputs consider to overdrive from the overdrive horizontal exporting change of the output of setup algorithm engine 111 of exporting change correlation Set (voltage and time：VOD_Xch(a)[M:0] and TOD_Xch(a)[M:0]), while input is overdrived setting from panel load correlation What table 115 was read overdrives setting (voltage and time：VOD_Xch(c)[M:0] and TOD_Xch(c)[M:0]).It is related anti-in panel load Circuit 1163 is reflected, calculating being weighted for these two settings of overdriving (voltage and time) etc. is obtained 1 and overdrived and sets Fixed (voltage and time：VOD_Xch(e)[M:0] and TOD_Xch(e)[M:0]), it is output to setting decision-making circuit 1164 of overdriving.Overdrive Setting decision-making circuit 1164 uses to be determined with the related reflection circuit 1162 of interactive interference reflection circuit 1163 related to panel load Setting of overdriving (voltage and time) setting value, determine last overdrive voltage and to overdrive the time, control source electrode drives Dynamic device 12 is overdrived.Algorithm of weighting for setting of overdriving described herein as etc. can be adjusted arbitrarily.

[the 5th embodiment of the invention]

Hereby just the 5th embodiment of the present invention illustrates.The 5th embodiment of the present invention possesses the number shown in Figure 11 According to the control unit 11 of overdriving among the inscape of output device 1, source electrode driver 12 and self-recision circuit of overdriving 13.Furthermore in the 5th embodiment, in control unit 11 of overdriving with the output among the detailed inscape shown in Figure 12 The related setup algorithm engine 111 of overdriving of change, (first overdrives sets the setting table of overdriving combined closely with this engine 111 Determine table) 112 and overdrive setting control circuit 116.In addition, as shown in figure 25, self-recision circuit 13 of overdriving have than Compared with device 131 (analog voltage comparator) and setting amendment circuit 132 of overdriving.In addition, except internal electricity on source electrode driver 12 Outside road 122, analog output buffer 121 is additionally provided with.

Overdrived setup algorithm engine 111 in exporting change correlation, and foregoing first embodiment is same, it is relatively more current Horizontal view data and preceding 1 horizontal view data, detection are output to the source electrode corresponding to the driving of present level line The required voltage level of driving needed for line, appropriate drive is crossed with reference to driving required Voltage Establishment corresponding relation and being preset with Dynamic voltage and the setting table 112 of overdriving for time of overdriving, determining to drive with it must the corresponding overdrive voltage of voltage and mistake Driving time, it is communicated to setting control circuit 116 of overdriving.

Herein, just overdrive the construction of self-recision circuit 13 and effect illustrates.Typically in the volume production of display panel When, the value with linear load of source electrode line can produce deviation.If it is with situation of the linear load as typical (Typical) using source electrode line Default (default), the setting overdrived and volume production display panel, then in panel, with linear load, successfully finished product is allusion quotation During type, overdrive and correctly work, reach voltage will not produce voltage error, if but panel with linear load deviation minimum side Or during maximum side, then it may produce voltage error.If for example, with linear load deviation minimum side, although load is less than typical case Situation, but overdrive and can apply in large quantities, voltage does transient response, remains to up to the voltage higher than voltage level desired value State terminate until 1 horizontal driving time, and have the certain possibility of last current potential.It is if on the contrary, inclined with linear load To maximum side, although then load is more than typical situation, overdrive to apply in a small amount, overdrive voltage deficiency, keep Voltage terminates until 1 horizontal driving time less than the state of voltage level desired value, and has the certain possibility of last current potential Property.If dynamically correcting this state, in the volume production of panel, even if distribution load deviation, it can also stabilize it ground Reach voltage level desired value.I.e., as shown in figure 22, during volume production with linear load deviation minimum side when, detection match somebody with somebody linear load, general The setting overdrived be modified to it is a little bit smaller, on the contrary, during volume production with linear load be inclined to maximum side when, detection match somebody with somebody linear load, general The setting overdrived is modified to greatly a bit.

In addition, Figure 23 shows the output voltage waveforms and current waveform overdrived.In the output overdrived shown in Figure 23 Voltage waveform and current waveform, for example, panel with linear load its volume production finished product for it is typical when, because the setting overdrived is excellent Change, so being configured to just reach voltage level desired value in the sequential as closing of overdriving.In overdriving during turning on, The output current overdrived is to be output to the lasting state of panel side from source electrode driver.Overdrive after closing is also source drive Device continues output voltage desired value, but source electrode line has reached voltage desired value, thus the output of the electric current from source electrode driver into For 0.

On the other hand, as shown in figure 23, panel with linear load its volume production finished product in minimum side, that overdrives is set to For the state excessively to work, exceed voltage level desired value as the sequential closed, output voltage overdriving and do instantaneous Response.In addition, it is also that source electrode driver continues output voltage desired value after closing of overdriving, so output current can be from panel side It is introduced in drive-side (sink current).In addition, as shown in figure 23, panel with linear load its volume production finished product at maximum side, The setting overdrived is being overdrived as the sequential closed, output voltage does not reach voltage level expectation as the state of deficiency Value, turn into the state of electric current deficiency.Overdrive after closing and source electrode driver continues output voltage desired value, so output electricity Stream can be output to panel side (sourcing current) from drive-side.

Herein, to detect the voltage waveform of the source electrode line shown in Figure 23 in output circuit side, then the institute of feedback diagram 19 is needed The panel shown it is long-range, i.e. on effective coverage edge voltage, this is unpractical.

Then, in the sequential for making to overdrive as closing, if stopping the output from source electrode driver, closed overdriving Closing the output voltage level of time point can be kept.Therefore, fed back from source electrode driver side and keep voltage, and voltage level desired value Compare, then the output voltage (holding voltage) that may know that in closing time point of overdriving generates more between voltage level desired value Few deviation.For example, panel with linear load its volume production finished product for it is typical when, the setting overdrived is optimised, turns into overdriving The sequential of closing just reaches voltage level desired value, so it is expected from the output voltage of source electrode driver feedback with voltage level The difference of value is 0.

On the other hand, panel with linear load its volume production finished product in minimum side, the setting overdrived, which turns into, excessively to be acted as State, exceed voltage level desired value as the sequential closed, output voltage overdriving and do transient response and pass through.Cause This, output voltage and the comparison of voltage level desired value are that only its difference occurs in the form of negative.In addition, the distribution of panel is born Its volume production finished product is carried at maximum side, the setting overdrived is being overdrived as the sequential closed, voltage as the state of deficiency Voltage level desired value is not reached, turns into the state of deficiency.Therefore, the comparison of output voltage and voltage level desired value is that only have Its difference occurs in the form of positive number.Using this characteristic, the extent of deviation with linear load during volume production is detected, based on its detection Value, amendment is set for overdriving.Furthermore in this situation, long-range, i.e. edge on effective coverage without feedback panel Voltage, this simple construction detection potential difference of node of available feedback and then output circuit.

Figure 25 displays are using the feedback from source electrode driver and to correct the self-recision of overdriving for setting of overdriving The specific configuration of circuit 13 and peripheral circuit.As shown in figure 25, source electrode driver 12 has positioned at the final stage of source electrode driver 12 Analog output buffer 121 and (included to the view data of source electrode line for this input and output of analog output buffer 121 The information of driving voltage) internal circuit 122.It has been observed that overdriving control unit 11 when being overdrived, driven for source electrode The internal circuit 122 of dynamic device 12 inputs the control signal of regulation overdrive voltage and time of overdriving.Therefore, source electrode driver 12 Internal circuit 122 overdrive voltage and the control signal of time of overdriving are input to analog output buffer 121, this simulation The driving voltage of the overdrive voltage for the scheduled time that overlaps is output to source electrode line by output buffer 121.In addition, control of overdriving Portion 11 is overdriving as the sequential closed, and is used for being inputted positioned at the analog output buffer 121 of the final stage of source electrode driver 12 So that its analog output buffer 121 to be controlled to the output buffer control signal for closing.Thereby, overdrive as close when Sequence, analog output buffer 121 stop, and keep the output voltage level from source electrode driver 12.

Herein, the system of comparator 131 input that self-recision circuit 13 of overdriving possesses has the sequential use in closing of overdriving So that the output buffer control signal that analog output buffer 121 is closed, and input has from source electrode driver 12 respectively simultaneously Internal circuit 122 is input to the input signal of analog output buffer 121 and from analog output buffer 121 for source electrode The output signal of line output.Therefore, comparator 131 turns into the sequential closed in analog output buffer 121, and it is defeated to compare its simulation Go out the input signal of buffer 121 and the voltage of output signal.Panel with linear load its volume production finished product for it is typical when, driven crossing The dynamic sequential as closing, it should be just to reach voltage level desired value, so the input to analog output buffer 121 is believed Number equivalent to the voltage level desired value that should put on source electrode line.In addition, if panel is typical case with linear load its volume production finished product, Then arrive the voltage of the input signal of analog output buffer 121 and the voltage of the output signal from analog output buffer 121 Occur without difference.Therefore, in comparator 131, when the voltage of input signal and output signal does not have poor, overdrive and set without amendment It is fixed.On the other hand, in panel with linear load its volume production finished product in minimum side or maximum side when, to analog output buffer 121 The voltage of input signal and the voltage of the output signal from analog output buffer 121 can produce difference.Therefore, comparator 131 are output to the difference of the input signal of analog output buffer 121 and the voltage of output signal setting amendment electricity of overdriving Road 132.Difference of the circuit 132 based on the voltage detected with comparator 131 is corrected in setting of overdriving, and calculates to correct drive The correction value of dynamic setting, control unit 11 of overdriving is fed back to by the correction value obtained herein.Control unit 11 of overdriving is based on from mistake The correction value that driving setting amendment circuit 132 receives, corrects setting (voltage and time) of overdriving, revised overdrive is set Definite value is input to source electrode driver 12 once again.Thereby, it is contemplated that the deviation with linear load during panel volume production, carry out most suitable Overdrive.

Furthermore self-recision circuit 13 is overdrived in the initial power initiation of display panel, carries out above-mentioned overdrive The correcting process of setting value., can be to from control unit 11 of overdriving after it if carrying out a correcting process in power initiation The setting value of overdriving for being input to source electrode driver 12 often applies amendment, so without being especially modified processing after it. In usual action, it is applied to setting of overdriving when the correction value that self-recision circuit 13 of overdriving determines is normal, so in face During the volume production of plate, even if distribution load deviation, most suitable setting of overdriving also can be always obtained.However, according to display surface The keeping environment of plate or temperature, the humidity of surrounding, also to consider the situation with linear load change.Therefore, overdrive self-recision Circuit 13 can also be carried out periodically overdriving the correcting process of setting value.

[the 6th embodiment of the invention]

The 6th embodiment of the present invention is illustrated.The 6th embodiment of the present invention possesses the data shown in Figure 11 Overdrive control unit 11 and source electrode driver 12 among the inscape of output device 1.Furthermore in the 6th embodiment, Overdrive control unit 11 with the panel load correlation among the detailed inscape shown in Figure 12 overdrive setting table 115 and Overdrive and set control circuit 116.In this way, the data output device 1 of the present invention can also only consider the source electrode line of display panel With linear load and adjust setting of overdriving.

[the optimal embodiment of data output device]

Figure 11, Figure 12, Figure 13, Figure 25 disclose the optimal embodiment of the data output device 1 on the present invention.Such as figure Shown in 11, data output device 1 of the invention is with control unit 11 of overdriving, source electrode driver 12 and self-recision of overdriving Circuit 13 is formed.In addition, as shown in figure 12, overdrive control unit 11 with exporting change correlation overdrive setup algorithm engine 111, Setup algorithm engine 113 of overdriving related to setting table 112 of overdriving that this engine 111 is combined closely, abutment line interactive interference, The setting table 115 and overdriving of overdriving related to overdrive setting table 114, the panel load that this engine 113 is combined closely is set Determine control circuit 116 to form.In addition, as shown in figure 13, setting control circuit 116 of overdriving is with linear compensation circuit 1161, friendship The mutually related reflection circuit 1162 of interference, the related reflection circuit 1163 of panel load and the setting structure of decision-making circuit 1164 of overdriving Into.In addition, as shown in figure 25, source electrode driver 12 is formed with analog output buffer 121 and internal circuit 122.Driven in addition, crossing Dynamic self-recision circuit 13 is formed with comparator 131 and setting amendment circuit 132 of overdriving.Will on each composition described herein as Element, it is as illustrated by via first embodiment to the 6th embodiment.

More than, in this manual, in order to show present disclosure, carry out the present invention's while with reference to drawing The explanation of embodiment.However, the present invention is not limited by above-mentioned embodiment, include to have in art certainly and lead to Normal skill obviously changes form or improvement form based on the item described in this specification.

[practicality]

The present invention is adapted to using in e-machine industry.Particularly data output device of the invention is suitably used in It is assembled to the drive circuit of the thin type panel comprising liquid crystal panel.

Claims

1. a kind of data output device, it is characterised in that include：

Source electrode driver, it drives a plurality of source electrode line of display panel；And

Overdrive control unit, foregoing source electrode driver is controlled into the voltage level more than voltage level expected value and overdrived by it The foregoing scheduled time of source electrode line one；

Wherein, foregoing control unit of overdriving has：

First overdrives setting table, its according to present level line and the voltage level of its horizontal view data previous difference, Set both or one of which of overdrive voltage and time of overdriving；And

Overdrive setting control circuit, it is based on foregoing first and overdrived setting table, and control corresponds to what present level line drove The overdrive voltage of a plurality of source electrode line and overdrive the time；

Aforementioned data output device further includes：Overdrive self-recision circuit, it is corrected caused by foregoing control unit of overdriving Overdrive voltage and overdrive the time；

Foregoing self-recision circuit of overdriving has：

Comparator, overdriving caused by its more foregoing control unit of overdriving terminate the output electricity from source electrode driver under time point Pressure and the voltage level desired value of the source electrode driver；And

Overdrive setting amendment circuit, it, will be correcting overdrive voltage and mistake based on the output valve from foregoing comparator The control signal of driving time setting is output to foregoing control unit of overdriving.

2. data output device according to claim 1, it is characterised in that foregoing control unit of overdriving further has： Second overdrives setting table, and it sets overdrive voltage and mistake according to the resistance of source electrode line and both or one of which of electric capacity Both or one of which of driving time,

Foregoing setting control circuit of overdriving is overdrived based on foregoing first setting table and foregoing second overdrives setting table, to every Bar source electrode line traffic control overdrive voltage and overdrive the time.

3. data output device according to claim 2, it is characterised in that foregoing setting control circuit of overdriving is only to more The benchmark source electrode line of a part in bar source electrode line determines overdrive voltage and overdrives the time,

And further have：Linear compensation circuit, it is based on the overdrive voltage determined to aforementioned basic source electrode line and overdrives Time, to the overdrive voltage of the source electrode line beyond aforementioned basic source electrode line and overdrived the time by linear compensation decision.

4. the data output device according to Claims 2 or 3, it is characterised in that foregoing control unit of overdriving further has Have：3rd overdrives setting table, its according to this that to be overdrived source electrode line and with the voltage change of the source electrode line of its adjoining Difference, both or one of which of overdrive voltage and time of overdriving are set,

It is foregoing overdrive setting control circuit based on foregoing first overdrive setting table, foregoing second overdrive setting table and foregoing 3rd overdrives setting table, to every source electrode line traffic control overdrive voltage and overdrives the time.

5. a kind of data output device, it is characterised in that include：

Overdrive control unit, foregoing source electrode driver is controlled into the voltage level more than voltage level desired value and overdrived by it The foregoing scheduled time of source electrode line one；

Wherein, foregoing control unit of overdriving has：

Overdrive setting table, it sets overdrive voltage and mistake according to the resistance of source electrode line and both or one of which of electric capacity Both or one of which of driving time；And

Overdrive and set control circuit, it is based on foregoing setting table of overdriving, to every source electrode line traffic control overdrive voltage and mistake Driving time；

Foregoing self-recision circuit of overdriving has：