CN101425279B - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN101425279B CN101425279B CN2008101739087A CN200810173908A CN101425279B CN 101425279 B CN101425279 B CN 101425279B CN 2008101739087 A CN2008101739087 A CN 2008101739087A CN 200810173908 A CN200810173908 A CN 200810173908A CN 101425279 B CN101425279 B CN 101425279B
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Abstract
A liquid crystal display device includes a display unit including a plurality of gate lines and a plurality of signal lines, a scanning unit that sequentially scans lines corresponding to the plurality of signal lines, a memory circuit that stores video data based on a scanning signal from the scanning unit, and a selection circuit, to which signals formed of two values are supplied, that selects one of the signals formed of the two values based on the video data stored in the memory circuit and supplies the selected signal to one of the plurality of the signal lines as a video signal.
Description
Technical field
The present invention relates to liquid crystal indicator, particularly possess the liquid crystal indicator of the display part that comprises many signal line.
Background technology
In the past, known have a liquid crystal indicator (for example, with reference to patent documentation 1) that possesses the display part that comprises many signal line.
In above-mentioned patent documentation 1, possess: a plurality of pixels; The signal wire that is connected respectively with a plurality of pixels; Be connected with many signal line, and have the H switch of the switch portion corresponding with many signal line difference; Be connected and be provided for carrying out the shift register of operation signal of conducting disconnection work of the switch portion of H switch with the H switch.In the liquid crystal indicator that above-mentioned patent documentation 1 is put down in writing, when a plurality of pixels are write picture signal, picture signal is offered the H switch, and provide sweep signal to the H switching sequence from shift register.And, according to sweep signal from shift register, the H switching sequence whenever predetermined during become conducting state (dot sequency), and provide picture signal to signal wire according to dot sequency.
[patent documentation 1] spy opens flat 11-109926 communique
But, in the liquid crystal indicator that above-mentioned patent documentation 1 is put down in writing, because the switch operating that the conducting of the picture signal by carrying out the H switch according to dot sequency disconnects, make writing to a plurality of pixels according to carrying out during the every regulation of dot sequency, so (increasing under the situation of pixel count) under the situation of the resolution that improves display part, need to consider further to shorten during the writing of the pixel of 1 row at during the writing of 1 pixel.In the case, because shorten, so there is the problem that writes the difficulty that becomes for each pixel fully at during the writing of 1 pixel.
Summary of the invention
The present invention proposes in order to solve the above problems, even 1 purpose of the present invention is to provide a kind of under the situation that resolution increases, and the also liquid crystal indicator that can write fully each pixel.
The liquid crystal indicator of one aspect of the present invention possesses: the display part that comprises many grid lines and signal wire; The scanning element of the line that sequential scanning is corresponding with above-mentioned signal wire; According to memory circuit from the sweep signal storing image data of scanning element; And the selection circuit, it is provided the signal of being made up of two-value, and in the signal of selecting to be made up of two-value according to the view data that is stored in the memory circuit any one, offers signal wire as picture signal.
In the liquid crystal indicator in one aspect of the invention, possess: according to memory circuit from the sweep signal storing image data of scanning element by constituting as mentioned above; And be provided the signal of forming by two-value, and in the signal of selecting to form according to the view data that is stored in the memory circuit any one by two-value, offer the selection circuit of signal wire as picture signal, can image data storage in memory circuit during in select signal all the time, and selected signal is offered signal wire continuously as picture signal.Thus, even because also can extend under the situation that resolution uprises, so, can write fully to each pixel with to write the situation of picture signal successively according to dot sequency during every regulation different at during the writing of each pixel.
In the liquid crystal indicator aspect above-mentioned one, preferably, memory circuit, with than scanning element at scan period of the line corresponding with 1 signal line long during preserve view data; View data be stored in the memory circuit during in, utilize to select circuit, select signal according to the view data that is stored in the memory circuit, offer signal wire as picture signal.If adopt such structure, then easily, at the scan period of the scanning element of 1 signal line, with become the writing of each pixel during, compare based on (to during the providing of the picture signal of signal wire) during the writing of dot sequency mode, of the present invention the writing during writing be provided during the providing of the view data of the memory circuit that can extend during (to during the providing of the picture signal of signal wire).
In the liquid crystal indicator aspect above-mentioned one, preferably, the view data that is stored in the memory circuit is saved 1 horizontal period; According to the view data that has been saved 1 horizontal period, utilize and select circuit selection signal, offer signal wire as picture signal in 1 horizontal period.If adopt such structure, then owing to the picture signal of selecting according to the view data of being preserved can be offered signal wire in 1 horizontal period, so maintain conducting state by the grid with pixel transistor 10a this moment, can easily carry out long-standing writing to each pixel.
In the liquid crystal indicator aspect above-mentioned one, preferably, memory circuit comprises: with select circuit to be connected and the storage part of storing image data; Be connected between the data line and storage part that view data is provided, be electrically connected the switch portion of data line and storage part according to the sweep signal of scanning element.If adopt such structure, the conducting disconnection control of switch portion then is provided owing to the sweep signal that provides in proper order by utilization, the time pin that makes image data storage in storage part each bar to each signal wire can be staggered, so begin regularly also can to stagger at each bar of each signal wire according to being stored in the supply when providing picture signal of view data in this storage part to each signal wire.Thus, can easily carry out writing of picture signal in proper order to each pixel.
In the liquid crystal indicator aspect above-mentioned one, preferably,, respectively be provided with 1 group for each bar of signal wire by memory circuit and the group of selecting circuit to form.If adopt such structure, then can easily use memory circuit and select circuit to provide picture signal for a long time each signal wire.
In the liquid crystal indicator aspect above-mentioned one, preferably, form by the 1st signal and the 2nd signal by the signal that two-value is formed; This liquid crystal indicator further possesses: the 1st signal wire and the 2nd signal wire that the 2nd signal is provided that are connected and provide the 1st signal with the selection circuit; Select circuit to comprise the 1st signaling switch portion and the 2nd signaling switch portion; The 1st signaling switch portion is connected between signal wire and the 1st signal wire, and the 2nd signaling switch portion is connected between signal wire and the 2nd signal wire; When in memory circuit, preserving the view data corresponding with the 1st signal, become conducting state by the 1st signaling switch portion, provide the 1st signal as picture signal from the 1st signal wire to signal wire, when in memory circuit, preserving the view data corresponding with the 2nd signal, become conducting state by the 2nd signaling switch portion, provide the 2nd signal as picture signal to signal wire from the 2nd signal wire.If adopt such structure, then in memory circuit, preserve the stage of any one view data in the 1st or the 2nd, in the 1st signaling switch portion and the 2nd signaling switch portion, the switch portion corresponding with the view data of preserving becomes conducting state, and via the switch portion that becomes conducting state signal offered signal wire as picture signal.Thereby, because can automatically select signal to offer signal wire accordingly, just can not carry out writing to pixel so do not carry out complicated control with view data as picture signal.
In the liquid crystal indicator aspect above-mentioned one, preferably, select circuit directly not to be connected via on-off circuit with signal wire.If adopt such structure, then, for example do not need to be provided with on-off circuits such as H switch, so can suppress from selecting circuit to the complicated phenomenon of the circuit structure of signal wire because when picture signal is offered signal wire.
In the liquid crystal indicator aspect above-mentioned one, preferably, the memory circuit corresponding with each signal line provided sweep signal simultaneously from scanning element, and this each signal line is corresponding to the redness, green and the blue sub-pixel that constitute 1 pixel.If adopt such structure, then can carry out the storage work of view data simultaneously to each memory circuit corresponding with the redness that constitutes 1 pixel, green and blue pairing each signal wire of sub-pixel.
In the liquid crystal indicator aspect above-mentioned one, preferably, further possess: pixel transistor; And the grid line driving circuit that carries out the conducting disconnection control of pixel transistor via grid line; Wherein, by during writing and in 1 horizontal period of forming during shifting, the grid line driving circuit is controlled, so that not only during writing, and with write during in during the continuous transfer regulation during, pixel transistor becomes conducting state, during wherein this writes be the writing of picture signal for the pixel of the amount of 1 row of grid line during, be that the row that writes end from pixel is during transferring to the transfer till the write activity of next line during this transfer.If adopt such structure, then in 1 horizontal period because the regulation in can be during transfer during carry out being carried out writing of the pixel that writes for later stage in 1 horizontal period, so during can guaranteeing long writing for whole pixels.Its result can write fully to whole pixels.
In the case, preferably, during the regulation during the transfer, be at writing of pixel can finish during, this pixel is to be carried out the pixel that writes at last during the writing in 1 horizontal period.If adopt such structure, then the pixel of amount of 1 row is write fashionable, can easily guarantee to whole pixels write fully during.
In the liquid crystal indicator aspect above-mentioned one, preferably, further possess: pixel transistor; And the conducting of carrying out pixel transistor disconnects the grid line driving circuit of control; Wherein, grid line driving circuit, memory circuit, selection circuit and scanning element are arranged in the liquid crystal panel that comprises display part.If adopt such structure, then outer with grid line driving circuit, memory circuit, selection circuit and scanning element being arranged on liquid crystal panel situation is compared, the simplification that can implementation structure and the miniaturization of device.
Description of drawings
Fig. 1 is the integrally-built block scheme of the liquid crystal indicator of expression one embodiment of the present invention;
Fig. 2 is latch cicuit of liquid crystal indicator of expression one embodiment of the present invention and the circuit diagram of selecting the structure of circuit;
Fig. 3 be one embodiment of the present invention liquid crystal indicator display pixel is write fashionable sequential chart;
Fig. 4 is the figure of an example of the electronic equipment of the expression liquid crystal indicator that used one embodiment of the present invention;
Fig. 5 is the figure of an example of the electronic equipment of the expression liquid crystal indicator that used one embodiment of the present invention; And
Fig. 6 is the figure of an example of the electronic equipment of the expression liquid crystal indicator that used one embodiment of the present invention.
Symbol description
1: display part, 3:H driver (scanning element), 4:V driver (grid line driving circuit), 6: latch cicuit (memory circuit), 7: select circuit, 10: display pixel (sub-pixel), 11: grid line, 12: signal wire, 50: liquid crystal panel, 52a: the 1st signal wire, 52b: the 2nd signal wire, 60: latch portion's (storage part), 61: switch portion, 71: the 1 signaling switch portions, 72: the 2 signaling switch portions, 100: liquid crystal indicator.
Embodiment
Below, embodiments of the present invention are described with reference to the accompanying drawings.
Fig. 1 is the integrally-built block scheme of the liquid crystal indicator of expression one embodiment of the present invention.Fig. 2 is latch cicuit of liquid crystal indicator of expression one embodiment of the present invention and the circuit diagram of selecting the structure of circuit.In addition, Fig. 3 be one embodiment of the present invention liquid crystal indicator display pixel is write fashionable sequential chart.The structure of the liquid crystal indicator 100 of one embodiment of the present invention at first, is described with reference to Fig. 1～Fig. 3.
The liquid crystal indicator 100 of one embodiment of the present invention as shown in Figure 1, in liquid crystal panel 50, possesses display part 1, drive IC 2, H driver 3, V driver 4, change-over switch 5, latch cicuit 6, selects circuit 7.Drive IC 2 has and is used to control all functions of liquid crystal indicator 100.H driver 3 has the function that latch cicuit 6 orders that illustrate rearwards provide sweep signal.V driver 4 plays a role as the driving circuit of the grid line 11 that illustrates later.In addition, drive IC 2 is arranged to one by the glass substrate (not shown) of glass top chip mode and liquid crystal panel 50.In addition, H driver 3, V driver 4, change-over switch 5, latch cicuit 6, selection circuit 7 carry out integrated system on glass (SOG) mode of circuit by using the low temperature polycrystalline silicon technology on glass substrate, be formed on the substrate identical with pixel electrode 10b.Thus, can subdue semiconductor device number of packages, simplify assembling, can also dwindle external circuit substrate, can realize small-sized, lightweight, cost degradation as a whole.And H driver 3 and V driver 4 are respectively examples of " scanning element " of the present invention and " grid line driving circuit ".
On display part 1, be provided with and be configured to rectangular a plurality of display pixels 10, be provided with many grid lines 11 and signal wire 12 in mutually orthogonal mode.Display pixel 10 is configured in respectively on the position of grid line 11 and signal wire 12 quadratures.In addition, many grid lines 11 are connected with V driver 4 respectively, and many signal line 12 are connected with selecting circuit 7 respectively.Each display pixel 10 by pixel transistor 10a (TFT), pixel electrode 10b, be configured in locational opposite electrode 10c, the auxiliary capacitor 10d relative and constitute with pixel electrode 10b.In addition, between the pixel electrode 10b of display pixel 10 and opposite electrode 10c, dispose liquid crystal 13.In addition, the drain region D of pixel transistor 10a is connected with signal wire 12, and source region S is connected with the electrode of pixel electrode 10b and auxiliary capacitor 10d.In addition, the grid G of pixel transistor 10a is connected with grid line 11.Thus, from V driver 4 via grid line 11 when grid G provides the sweep signal (Continuity signal) of H level, pixel transistor 10a becomes conducting state.And, by from drive IC 2 via change-over switch 5 and any one signal the circuit signal (the VIDEO H of Fig. 1 and VIDEO L) 7 that provide, that be made up of H level and this two-value of L level is provided, leakage D and source S via signal wire 12, pixel transistor 10a, offer pixel electrode 10b as picture signal, control the current potential of pixel electrode 10b.
In addition, opposite electrode 10c is to be connected with COM and its current potential is made of the mode of COM control.By above formation, liquid crystal 13 is applied potential difference (PD) between pixel electrode 10b and the opposite electrode 10c.And, make the change in orientation of liquid crystal molecule by utilizing the current potential extent that liquid crystal 13 is applied, make the variations in refractive index that incides the light of liquid crystal 13 from light source (not shown).And, in the present embodiment, the potential difference (PD) of the current potential of the opposite electrode 10c that forms according to the current potential of the formed pixel electrode 10b of picture signal of H level of being made up of two-value or L level with by the control of COM, liquid crystal molecule are changed to light transmission to the orientation that monitors face (Show Color) and light and do not see through any one orientation to the orientation that monitors face (not Show Color).In addition, 1 display pixel 10 constitutes as 1 sub-pixel corresponding with any one color in redness, green and the blueness, and by constituting 1 pixel with red, green and blue 3 corresponding respectively display pixels 10.That is, in the present embodiment, constitute by red, the green and blue demonstration of all kinds and the formed 8 kinds of color display formats of combination of non-demonstration.And display pixel 10 (1 sub-pixel) is an example of " sub-pixel " of the present invention, and COM is an example of " opposed current potential provides portion " of the present invention.
At this, in the present embodiment, on each bar of many signal line 12, be connected with 1 group of latch cicuit 6 respectively and select circuit 7.Particularly, on signal wire 12, be connected with and select circuit 7, and selecting to be connected with latch cicuit 6 on the circuit 7.And, connect side by side mutually between the latch cicuit 6 that connects respectively on corresponding to 3 signal line 12 of each color, and each of the 1 group of latch cicuit 6 that connects side by side is connected to H driver 3.In addition, from drive IC 2,, be connected with data line 51a, 51b and 51c to corresponding to each of the latch cicuit 6 of the signal wire 12 of same color.Data line 51a, 51b and 51c constitute in the mode that enables (イ ネ-Block Le) signal (RENB, GENB, BENB) that red, green and blue view data is provided respectively.In addition, data line 51a, 51b and 51c are connected to corresponding to data line 51a, 51b, 51c and distinguish on whole latch cicuit 6 of corresponding color.Thus, from drive IC 2, to the enable signal (RENB, GENB, BENB) that the view data of each color is provided corresponding to whole latch cicuit 6 of same color.In addition, the view data of each color is made up of H level and this two-value of L level, and the view data of H level is and the corresponding signal of picture signal that is used to show above-mentioned color.In addition, the view data of L level is the signal corresponding with the signal that does not show above-mentioned color.In addition, each latch cicuit 6 constitutes in the mode of the view data of each color of (storage) is provided according to the sweep signal that provides from H driver 3 provides via data line 51a, 51b and 51c.In addition, the selection circuit 7 that is connected with each latch cicuit 6 is connected with change-over switch 5 via being respectively applied for the 1st signal wire 52a and the 2nd signal wire 52b that the signal of being made up of two-value is provided.And latch cicuit 6 is examples of " memory circuit " of the present invention.
In addition, in the present embodiment, drive IC 2 and change-over switch 5 are connected with drive IC 2 via the H level signal line 53a and the L level signal line 53b that are used for providing respectively the signal of being made up of two-value (the VIDEO H of Fig. 1 and VIDEO L).And the H level that provides from drive IC 2 and the signal of L level output to the 1st signal wire 52a and the 2nd signal wire 52b via change-over switch 5.In addition, change-over switch 5 has with from the 1st signal wire 52a and the 2nd signal wire 52b, and each horizontal period that writes at the display pixel 10 to 1 row is alternately exported the function that the mode of the signal of the signal of H level and L level is switched respectively.In addition, the current potential of opposite electrode 10c, utilization is carried out control with the controlled so-called COM inversion driving mode of mode in the counter-rotating of each horizontal period, and the change action of change-over switch 5, with based on the counter-rotating action of the current potential of the opposite electrode 10c of COM (not shown) synchronously.That is, carry out the switching of the target signal line that binary signal outputed to respectively and the counter-rotating of COM simultaneously.In addition, 1 horizontal period, as shown in Figure 3, by during the writing of picture signal at the display pixel 10 of 1 row, form up to being transferred to the black-out intervals till the write activity of next line (during the transfer) from the row that writes end of display pixel 10.
In addition, in the present embodiment, select circuit 7 to constitute in the following manner: when view data is stored in latch cicuit 6, with offer among the 1st signal wire 52a and the 2nd signal wire 52b, the signal of the signal wire of a side corresponding with the view data in being stored in latch cicuit 6 offers signal wire 12.Particularly, constitute in the following manner: when the view data of H level is stored, provide picture signal to signal wire 12, and when the view data of L level is stored, provide picture signal to signal wire 12 from the 2nd signal wire 52b from the 1st signal wire 52a.And, the picture signal of H level and L level, as mentioned above, by with switch in each horizontal period, between the 1st signal wire 52a and the 2nd signal wire 52b the signal wire be output and based on the current potential of the opposite electrode 10c of COM also simultaneously the mode of counter-rotating constitute, even offer the level of signal of pixel electrode 10b and the level counter-rotating that offers the picture signal of pixel electrode 10b from the 2nd signal wire 52b from the 1st signal wire 52a, the potential difference (PD) self between pixel electrode 10b and the opposite electrode 10c does not change yet.That is, constitute the signal that is provided for Show Color all the time from the 1st signal wire 52a, be provided for the not signal of Show Color all the time from the 2nd signal wire 52b.
In addition, in the present embodiment, as shown in Figure 2, in latch cicuit 6, be provided with: be connected and latch the portion that latchs 60 of (storage) view data with selecting circuit 7; Be connected the data line 51a (51b, 51c) of the view data that each color is provided and latch between the portion 60, and be electrically connected data line 51a and latch the switch portion 61 of portion 60 according to the sweep signal that H driver 3 produces.Latch portion 60 by constituting by 2 phase inverter 60a and the 60b that connects that mutual input part and efferent come to be connected side by side.In addition, switch portion 61 is made of the transmission gate transistor that connection n transistor npn npn 61a arranged side by side and p transistor npn npn 61b form.And H driver 3 is connected with the grid of n transistor npn npn 61a, and is connected via the grid of phase inverter 62 with p transistor npn npn 61b.In addition, a side of the source/leakage of the transmission gate transistor of formation switch portion 61 is connected with data line 51a (51b, 51c).In addition, the opposing party of the source/leakage of the transmission gate transistor of formation switch portion 61 is connected with input part that constitutes the phase inverter 60a that latchs portion 60 and the efferent of phase inverter 60b.
In addition, in the present embodiment, in selecting circuit 7, be provided with: the 1st signaling switch portion 71 and the 2nd signaling switch portion 72, wherein the 1st signaling switch portion 71 is made up of the transmission gate transistor that n transistor npn npn 71a and p transistor npn npn 71b are formed by connecting side by side, and the 2nd signaling switch portion 72 is made up of the transmission gate transistor that n transistor npn npn 72a and p transistor npn npn 72b are formed by connecting side by side.In addition, a side who constitutes in the source/leakage of transmission gate transistor of the 1st signaling switch portion 71 is connected with the 1st signal wire 52a, and a side who constitutes in the source/leakage of transmission gate transistor of the 2nd signaling switch portion 72 is connected with the 2nd signal wire 52b.In addition, the opposing party who constitute the opposing party in the source/leakage of transmission gate transistor of the 1st signaling switch portion 71, constitutes in the source/leakage of transmission gate transistor of the 2nd signaling switch portion 72 is connected with signal wire 12.In addition, the grid of the n transistor npn npn 71a of the 1st signaling switch portion 71 are connected with the grid of the p transistor npn npn 72b of the 2nd signaling switch portion 72, and the grid of the p transistor npn npn 71b of the 1st signaling switch portion 71 are connected with the grid of the n transistor npn npn 72a of the 2nd signaling switch portion 72.
Below, the work that writes of the liquid crystal indicator 100 of one embodiment of the present invention is described with reference to Fig. 1～Fig. 3.
At first, work when 1 display pixel 10 provides picture signal (writing) is described.And, in the present embodiment, although understand to the writing of red corresponding display pixel 10, but carry out to green and display pixel 10 that blueness is corresponding to write fashionable also be same work.
As shown in Figure 1, for example, under the view data (RENB) with H level (demonstration) offers the 1st group and situation red corresponding latch cicuit 6, meanwhile, provide sweep signal (with reference to Fig. 3) to the switch portion 61 of latch cicuit 6 from drive IC 2.And, as shown in Figure 2, the n transistor npn npn 61a of switch portion 61 and the grid of p transistor npn npn 61b are opened respectively by the sweep signal that is used to self-driven IC2, the switch portion of being made up of n transistor npn npn 61a and p transistor npn npn 61b 61 becomes conducting state.Thus, view data offers the portion of latching 60 via switch portion 61.At this moment, the view data utilization of the H level phase inverter 60a that latchs portion 60 is transformed to the L level.Thus, view data, be saved by the state of sentencing the H level at node N1 as the efferent side of the input part side of phase inverter 60a and phase inverter 60b, and the state of sentencing the L level at the node N2 as the input part side of the efferent side of phase inverter 60a and phase inverter 60b is saved, and is stored (latching) in the portion of latching 60.And, the view data of being stored, with the state former state of being stored offer and select circuit 7.That is, in the view data of being stored, the data that are kept at node N1 place with the state former state of H level are provided for the grid of the p transistor npn npn 72b of the grid of n transistor npn npn 71a of the 1st signaling switch portion 71 and the 2nd signaling switch portion 72.Simultaneously, be transformed to the L level and the data that are kept at node N2 place are provided for the grid of the n transistor npn npn 72a of the grid of p transistor npn npn 71b of the 1st signaling switch portion 71 and the 2nd signaling switch portion 72.And, in the case, the n transistor npn npn 71a of the signal by being provided the H level and the grid of p transistor npn npn 71b that have been provided the signal of L level are opened respectively, and the 1st signaling switch portion 71 that is made up of n transistor npn npn 71a and p transistor npn npn 71b becomes conducting state.Thus, the 1st signal wire 52a is connected with signal wire 12.And writing liquid crystal molecule via signal wire 12 to pixel electrode 10b from the 1st signal wire 52a becomes the picture signal (signal of Show Color) of light transmission to the orientation that monitors face.
In addition, under the situation of the view data (RENB) that L level (non-demonstration) is provided from drive IC 2, view data (RENB) in the time of in being stored in the portion of latching 60, utilizes phase inverter 60a to be transformed to the H level.Thus, the storage of view data is saved by the state of sentencing the L level at the node N1 as the efferent side of the input part side of phase inverter 60a and phase inverter 60b, and is saved at the state that the node N2 as the input part side of the efferent side of phase inverter 60a and phase inverter 60b sentences the H level and realizes.And in the view data of being stored, the data that are kept at node N1 place with the state former state of L level are provided for the grid of the p transistor npn npn 72b of the grid of n transistor npn npn 71a of the 1st signaling switch portion 71 and the 2nd signaling switch portion 72.Simultaneously, be transformed to the H level and the view data that is kept at node N2 place is provided for the grid of the n transistor npn npn 72a of the grid of p transistor npn npn 71b of the 1st signaling switch portion 71 and the 2nd signaling switch portion 72.And, in the case, opening respectively by the grid of n transistor npn npn 72a and p transistor npn npn 72b, the 2nd signaling switch portion 72 that is made up of n transistor npn npn 72a and p transistor npn npn 72b becomes conducting state.Thus, the 2nd signal wire 52b is connected with signal wire 12.And writing liquid crystal molecule via signal wire 12 to pixel electrode 10b from the 2nd signal wire 52b becomes light through the picture signal (the not signal of Show Color) to the orientation that monitors face.
The work that writes of the liquid crystal indicator 100 of 1 horizontal period then, is described.As shown in Figure 1, in 1 horizontal period, under the situation that disposes 1 group of latch cicuit 6 that n group is made up of 3 latch cicuits 6, provide view data from drive IC 2 to each latch cicuit 6 order, and from H driver 3, latch cicuit 6 orders that the 1st group latch cicuit 6 to n is organized provide sweep signal.At this, drive IC 2 is by synchronous with clock signal (not shown), with in that (latch cicuit 6 of 1≤k≤n) provides the mode of the sweep signal corresponding with the latch cicuit 6 of k group to be carried out control when view data is provided to the k group.
Particularly, during the writing of 1 horizontal period in, as shown in Figure 3, provide view data, and provide sweep signal to the 1st group latch cicuit 6 from the LATSW1 (latching switch 1) of drive IC 2 to the 1st group latch cicuit 6.Thus, the switch portion 61 (with reference to Fig. 2) of the portion that latchs 60 in the latch cicuit 6 becomes conducting state, and view data is stored (latching) in the portion of latching 60.And, under view data is stored in state in the portion of latching 60, view data is offered select circuit 7, be under the situation of H level in view data, select the 1st signaling switch portion 71 of circuit 7 to become conducting state.In addition, be under the situation of L level in view data, select the 2nd signaling switch portion 72 of circuit 7 to become conducting state.At this, during writing in, by being used to the grid-control of pixel transistor 10a to be made as conducting state, begin to write thereby picture signal offers pixel electrode 10b via signal wire 12 and pixel transistor 10a from the Continuity signal of V driver 4.And, in the display pixel 10 of 1 row, order begin to the display pixel 10 corresponding with the 1st group latch cicuit 6 to the writing of the corresponding display pixel 10 of the latch cicuit 6 of n group.
At this, in the present embodiment, control in the following manner: the view data that is stored in the latch cicuit 6 is preserved 1 horizontal period continuously, and utilizes V driver 4 to open the grid of pixel transistor 10a continuously in during writing.Thus, to the display pixel 10 corresponding, write continuously in beginning during writing from the moment of preserving data with the latch cicuit 6 of preserving data.And, be stored in the view data in the latch cicuit 6, preserve continuously up to when fashionable when latch cicuit 6 provides sweep signal writing of next line, newly store till the view data at the display pixel 10 of next line.
In addition, in the present embodiment, in 1 horizontal period, V driver 4 not only during writing in, and with write during in the continuous black-out intervals regulation during (Fig. 3 during A), the mode that becomes conducting state with pixel transistor 10a is carried out control.In addition, during the regulation A be at writing of display pixel 10 can finish during, this display pixel 10 is to be carried out the display pixel that writes at last during the writing in 1 horizontal period.Particularly, for example, be under the situation of about 190 μ s in 1 horizontal period, during A be about about 13～18 μ s.A during the regulation, can utilize liquid crystal capacitance, auxiliary capacitor, thread cast-off capacitance settings is suitable value.
Fig. 4 and Fig. 5 are respectively the example and the figure of another example that is used to illustrate the electronic equipment of the liquid crystal indicator that has used one embodiment of the present invention.Then, with reference to Fig. 4 and Fig. 5, the electronic equipment of the liquid crystal indicator 100 that has used one embodiment of the present invention is described.
The liquid crystal indicator 100 of one embodiment of the present invention as Fig. 4 and shown in Figure 5, can be used in mobile phone 200 and PC (Personal Computer, personal computer) 300 grades.In the mobile phone 200 of Fig. 4, use the liquid crystal indicator 100 of one embodiment of the present invention for display frame 200a.In addition, in the PC300 of Fig. 5, can use in the input part of keyboard 300a etc. and display frame 300b etc.In addition, under the situation of utilizing each electronic equipments of driving such as battery,, can extend the life of a cell by not using the reflective liquid crystal panel of light source.In addition, by peripheral circuit being built on the substrate in the liquid crystal panel, can reduce the part number of packages significantly, and can carry out the lightweight and the miniaturization of apparatus main body.
Fig. 6 is the figure of another example that is used to illustrate the electronic equipment of the liquid crystal indicator that has used one embodiment of the present invention.The electronic equipment of the liquid crystal indicator 100 that has used one embodiment of the present invention then, is described with reference to Fig. 6.
The liquid crystal indicator 100 of one embodiment of the present invention as shown in Figure 6, can be used for head up display 400.Liquid crystal indicator 100 is can be installed in the device of regulation in the mode that is shown projection display light L1 on body (for example, automobile front glass etc.) 401.Particularly, liquid crystal indicator 100 is configured between backlight 402 and the concave mirror 403.And the display light L1 from liquid crystal indicator 100 penetrates generates by inciding liquid crystal indicator 100 from the light of backlight 402.In addition, the display light L1 that penetrates from liquid crystal indicator 100 is reflexed to by concave mirror 403 and to be shown body 401 sides, is shown on the body 401 thereby be projected in.And above-mentioned liquid crystal indicator 100, backlight 402 and concave mirror 403 are incorporated in the inside with the shell 404 that is used to make the 404a of window portion that display light L1 sees through.The head up display 400 of this vehicle mounted, the in service needed information that is used for automobile (for example shows, obstacle informations such as velocity information, engine revolution, various warning message, road information, guidance information, people or thing etc.), but, because the demonstration of this information importantly makes the driver see clearly Chu,, two-value suits so showing.And liquid crystal indicator 100 of the present invention is because be to carry out the display device that two-value shows, so can be arranged to be suitable for the liquid crystal indicator of this head up display 400.
In the present embodiment, possess by constituting as mentioned above: according to latch cicuit 6 from the sweep signal storing image data of H driver 3; Be provided the signal of forming by H level and this two-value of L level, and in the signal of selecting to form according to the view data that is stored in the latch cicuit 6 any one by two-value, offer the selection circuit 7 of signal wire 12 as picture signal, can image data storage in latch cicuit 6 during in select signal all the time, and selected signal is offered signal wire 12 continuously as picture signal.Thus, even because also can extend under the situation that resolution uprises at during the writing of each display pixel 10, so, can write fully to each display pixel 10 with to write the situation of picture signal successively according to dot sequency during every regulation different.
In addition, in the present embodiment, by constituting: view data be stored in the latch cicuit 6 during in, utilize and select circuit 7 to select signal according to the view data that is stored in the latch cicuit 6, and offer signal wire 12, at the scan period of the H driver 3 of 1 signal line 12, with become during the writing of each display pixel 10, compare based on (to during the providing of the picture signal of signal wire 12) during the writing of dot sequency, of the present invention the writing during writing be provided during the providing of the data of the latch cicuit 6 that can extend during (to during the providing of the picture signal of signal wire 12).
In addition, in the present embodiment, by constituting as mentioned above: the view data that is stored in the latch cicuit is saved 1 horizontal period, according to the view data that has been saved 1 horizontal period, utilize and select circuit 7 to select signal, and offer signal wire 12 in 1 horizontal period, owing to the signal of selecting according to the view data of being preserved can be offered signal wire 12 in 1 horizontal period, so maintain conducting state by the grid with pixel transistor 10a this moment, can easily carry out long-standing writing to each display pixel 10.
In addition, in the present embodiment, by constituting as mentioned above, latch cicuit comprises: with select circuit 7 to be connected and the portion that latchs 60 of storing image data; Be connected between the data line 51 and storage part 60 that view data is provided, sweep signal according to H driver 3 is electrically connected data line 51 and the switch portion 61 that latchs portion 60, owing to carry out the conducting disconnection control of switch portion 61 by the sweep signal that utilization provides in proper order, the time pin that makes image data storage in the portion of latching 60 each bar to each signal wire 12 can be staggered, so latch the supply when signal is provided each signal wire 12 as picture signal of view data in the portion 60 and begin regularly also can to stagger at each bar of each signal wire 12 according to being stored in this.Thus, can easily carry out writing of picture signal in proper order to each display pixel 10.
In addition, in the present embodiment, by constituting as mentioned above: the group by latch cicuit 6 and selection circuit 7 are formed, respectively be provided with 1 group for signal wire 12, can easily use latch cicuit 6 and select 7 pairs of each signal wires of circuit 12 to provide picture signal for a long time.
In addition, in the present embodiment, by constituting as mentioned above: when in latch cicuit 6, preserving the view data of H level, become conducting state by the 1st signaling switch portion 71, provide signal as picture signal from the 1st signal wire 52a to signal wire 12, when in latch cicuit 6, preserving the view data of L level, become conducting state by the 2nd signaling switch portion 72, provide signal as picture signal from the 2nd signal wire 52b to signal wire 12, in latch cicuit 6, preserve any one the stage of view data in H level or the L level, in the 1st signaling switch portion 71 and the 2nd signaling switch portion 72, the switch portion corresponding with the level of the view data of preserving becomes conducting state, and via the switch portion that becomes conducting state picture signal offered signal wire 12.Thereby, because can automatically select picture signal accordingly and offer signal wire 12, just can not write display pixel 10 so do not carry out complicated control with view data.
In addition, in the present embodiment, by constituting as mentioned above: select circuit 7 and signal wire 12, directly do not connect via on-off circuit, because when picture signal is offered signal wire 12, for example do not need to be provided with on-off circuits such as H switch, so can suppress from selecting circuit 7 to the complicated phenomenon of the circuit structure of signal wire 12.
In addition, in the present embodiment, by constituting: for the latch cicuit 6 corresponding with each signal line 12, provide sweep signal simultaneously from H driver 3, wherein this each signal line 12 is corresponding to the redness, green and the blue display pixel 10 that constitute 1 pixel, can carry out the storage work of view data simultaneously to each latch cicuit 6 corresponding with pairing each signal wire of the redness of 1 pixel of formation, green and blue display pixel 10 12.
In addition, in the present embodiment, by constituting: in by 1 horizontal period of forming with black-out intervals during writing, V driver 4 is controlled, so that not only during writing, and with write during in during the continuous transfer regulation during (Fig. 3 during A), pixel transistor 10a becomes conducting state, in 1 horizontal period, because A carries out being carried out writing of the display pixel 10 that writes for the later stage in 1 horizontal period during the regulation in can be during transfer, so during can guaranteeing long writing for whole display pixel 10, during during this writes being the writing of picture signal for the display pixel 10 of the amount of 1 row of grid line 11, this black-out intervals is that the row that writes end from display pixel 10 is up to transferring to the black-out intervals till the write activity of next line.Its result can write fully to whole display pixel 10.
In addition, in the present embodiment, by constituting as mentioned above: A during the regulation of black-out intervals, be at writing of display pixel 10 can finish during, this display pixel 10 is to be carried out the display pixel 10 that writes at last during the writing in 1 horizontal period, the display pixel 10 of amount of 1 row is write fashionable, can easily guarantee to whole display pixel 10 write fully during.
In addition, in the present embodiment, by as mentioned above, V driver 4, latch cicuit 6, selection circuit 7 and H driver 3 are arranged in the liquid crystal panel 50, the situation outer with these circuit being arranged on liquid crystal panel 50 compared, the simplification that can implementation structure and the miniaturization of device.
And this disclosed embodiment should be thought the illustration under whole aspects, and be not restrictive.Scope of the present invention is not the explanation of above-mentioned embodiment, but is represented by the scope of claim, and then is included in and the meaning of the scope equalization of claim and the whole variant in the scope.
For example, in the above-described embodiment, though show the example that transmission gate transistor that utilization is made up of 2 n transistor npn npn 61a and p transistor npn npn 61b constitutes the switch portion 61 of latch cicuit 6, the present invention is not limited to this, also can utilize 1 transistor to constitute.
In addition, in the above-described embodiment, though show the view data that constitutes the H level is the signal corresponding with the picture signal that is used for Show Color, and the view data that constitutes the L level is the example of the signal corresponding with the signal of Show Color not, but the present invention is not limited to this, the view data that also can constitute the H level is and is used for the not corresponding signal of picture signal of Show Color, and the view data that constitutes the L level is the signal corresponding with the signal of Show Color.
Claims (10)
1. liquid crystal indicator is characterized in that possessing:
The display part that comprises many grid lines and signal wire;
The scanning element of the line that sequential scanning is corresponding with above-mentioned signal wire;
According to memory circuit from the sweep signal storing image data of above-mentioned scanning element;
Select circuit, it is provided the signal of being made up of two-value, and according to be stored in the above-mentioned signal of forming by two-value of view data selection in the above-mentioned memory circuit any one, offer above-mentioned signal wire as picture signal;
Pixel transistor; And
The conducting of carrying out above-mentioned pixel transistor via above-mentioned grid line disconnects the grid line driving circuit of controlling;
Above-mentioned memory circuit, with than scanning element at the scan period of the line corresponding with 1 above-mentioned signal wire long during preserve above-mentioned view data;
Above-mentioned view data be stored in the above-mentioned memory circuit during in, utilize above-mentioned selection circuit, select in the above-mentioned signal of forming by two-value any one according to being stored in view data in the above-mentioned memory circuit, offer above-mentioned signal wire as above-mentioned picture signal;
By during writing and in 1 horizontal period of forming during shifting, above-mentioned grid line driving circuit is controlled, so that not only during above-mentioned writing, and with above-mentioned writing during in during the continuous above-mentioned transfer regulation during, above-mentioned pixel transistor becomes conducting state, during being the writing of picture signal, be to write end during transferring to during this transfers during wherein this writes to the transfer till the write activity of next line from the pixel of 1 of above-mentioned grid line capable amount for the pixel of the amount of 1 row of above-mentioned grid line;
During the regulation during the above-mentioned transfer, be at during being carried out at last during the writing in above-mentioned 1 horizontal period among the pixel of amount of 1 row of above-mentioned grid line that writing of the pixel that writes can finish.
2. liquid crystal indicator according to claim 1, wherein:
The view data that is stored in the above-mentioned memory circuit is saved 1 horizontal period;
According to the above-mentioned view data that has been saved above-mentioned 1 horizontal period, utilize above-mentioned selection circuit to select in the above-mentioned signal of forming by two-value any one, offer above-mentioned signal wire as above-mentioned picture signal in above-mentioned 1 horizontal period.
3. liquid crystal indicator according to claim 1 and 2, wherein:
Above-mentioned memory circuit comprises: be connected and store the storage part of above-mentioned view data with above-mentioned selection circuit; Be connected between the data line and above-mentioned storage part that above-mentioned view data is provided, be electrically connected the switch portion of above-mentioned data line and above-mentioned storage part according to the sweep signal of above-mentioned scanning element.
4. liquid crystal indicator according to claim 1 and 2, wherein:
The group of being made up of above-mentioned memory circuit and above-mentioned selection circuit respectively is provided with 1 group for each bar of above-mentioned signal wire.
5. liquid crystal indicator according to claim 1 and 2, wherein:
The above-mentioned signal of being made up of two-value is made up of the 1st signal and the 2nd signal;
This liquid crystal indicator further possesses:
The 1st signal wire and the 2nd signal wire that above-mentioned the 2nd signal is provided that above-mentioned the 1st signal is provided and provides with above-mentioned selection circuit;
Above-mentioned selection circuit comprises the 1st signaling switch portion and the 2nd signaling switch portion;
Above-mentioned the 1st signaling switch portion is connected between above-mentioned signal wire and above-mentioned the 1st signal wire, and above-mentioned the 2nd signaling switch portion is connected between above-mentioned signal wire and above-mentioned the 2nd signal wire;
When in above-mentioned memory circuit, preserving the view data corresponding with above-mentioned the 1st signal, become conducting state by above-mentioned the 1st signaling switch portion, provide above-mentioned the 1st signal as above-mentioned picture signal from above-mentioned the 1st signal wire to above-mentioned signal wire, when in above-mentioned memory circuit, preserving the view data corresponding with above-mentioned the 2nd signal, become conducting state by above-mentioned the 2nd signaling switch portion, provide above-mentioned the 2nd signal as above-mentioned picture signal to above-mentioned signal wire from above-mentioned the 2nd signal wire.
6. liquid crystal indicator according to claim 5 further possesses:
Apply the pixel electrode of above-mentioned picture signal;
The opposite electrode that disposes in the mode relative with pixel electrodes; And
The opposed current potential of controlling the current potential of above-mentioned opposite electrode provides portion;
Wherein, from above-mentioned the 1st signal wire and above-mentioned the 2nd signal wire, alternately switch in each 1 horizontal period respectively above-mentioned the 1st signal and above-mentioned the 2nd signal are provided, and with the timing of the switching of above-mentioned the 1st signal and above-mentioned the 2nd signal side by side, utilize above-mentioned opposed current potential that the current potential counter-rotating of portion with above-mentioned opposite electrode is provided.
7. liquid crystal indicator according to claim 1 and 2, wherein above-mentioned selection circuit and above-mentioned signal wire directly do not connect via on-off circuit.
8. liquid crystal indicator according to claim 1 and 2, wherein corresponding above-mentioned memory circuit with the above-mentioned signal wire of each bar, provided sweep signal simultaneously from above-mentioned scanning element, the above-mentioned signal wire of this each bar is corresponding to the redness, green and the blue sub-pixel that constitute 1 pixel.
9. liquid crystal indicator according to claim 1 and 2 further possesses:
Pixel transistor; And
The conducting of carrying out above-mentioned pixel transistor disconnects the grid line driving circuit of control;
Wherein, above-mentioned grid line driving circuit, above-mentioned memory circuit, above-mentioned selection circuit and above-mentioned scanning element are arranged in the liquid crystal panel that comprises above-mentioned display part.
10. an electronic equipment is characterized in that, possesses any described liquid crystal indicator of claim 1～9.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP285835/2007 | 2007-11-02 | ||
| JP2007285835 | 2007-11-02 | ||
| JP320409/2007 | 2007-12-12 | ||
| JP2007320409 | 2007-12-12 | ||
| JP246081/2008 | 2008-09-25 | ||
| JP2008246081A JP2009163214A (en) | 2007-11-02 | 2008-09-25 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101425279A CN101425279A (en) | 2009-05-06 |
| CN101425279B true CN101425279B (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101739087A Expired - Fee Related CN101425279B (en) | 2007-11-02 | 2008-10-30 | Liquid crystal display device |
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| Country | Link |
|---|---|
| JP (1) | JP2009163214A (en) |
| CN (1) | CN101425279B (en) |
| TW (1) | TW200929151A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101311693B1 (en) * | 2011-01-31 | 2013-09-26 | 샤프 가부시키가이샤 | Liquid crystal display panel, production method for same, and array substrate and production method for same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6097362A (en) * | 1997-10-14 | 2000-08-01 | Lg Semicon Co., Ltd. | Driver for liquid crystal display |
| CN1358297A (en) * | 2000-01-14 | 2002-07-10 | 松下电器产业株式会社 | Active matrix display apparatus and method for driving the same |
| US6504522B2 (en) * | 1997-06-04 | 2003-01-07 | Sharp Kabushiki Kaisha | Active-matrix-type image display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61128292A (en) * | 1984-11-28 | 1986-06-16 | 富士通株式会社 | Driver for active matrix type display panel |
| JP3621347B2 (en) * | 2000-12-27 | 2005-02-16 | シャープ株式会社 | Image display device |
| JP2007101570A (en) * | 2005-09-30 | 2007-04-19 | Seiko Epson Corp | Driving device, electrooptical apparatus, electronic equipment, and driving method |
-
2008
- 2008-09-25 JP JP2008246081A patent/JP2009163214A/en not_active Withdrawn
- 2008-10-23 TW TW97140596A patent/TW200929151A/en unknown
- 2008-10-30 CN CN2008101739087A patent/CN101425279B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6504522B2 (en) * | 1997-06-04 | 2003-01-07 | Sharp Kabushiki Kaisha | Active-matrix-type image display device |
| US6097362A (en) * | 1997-10-14 | 2000-08-01 | Lg Semicon Co., Ltd. | Driver for liquid crystal display |
| CN1358297A (en) * | 2000-01-14 | 2002-07-10 | 松下电器产业株式会社 | Active matrix display apparatus and method for driving the same |
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| Publication number | Publication date |
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| TW200929151A (en) | 2009-07-01 |
| CN101425279A (en) | 2009-05-06 |
| JP2009163214A (en) | 2009-07-23 |
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