JP2006317960A - Display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display apparatus capable of surely eliminating uneven display occurring in each display pixel group of a first scanning electrode or of an N-th scanning electrode without causing cost rise for driving a dummy scanning electrode. <P>SOLUTION: The display apparatus comprises N normal scanning electrodes 11, a plurality of normal pixel electrodes arranged in a matrix, and a dielectric material layer disposed between them. A first dummy scanning electrode 11a is formed adjacent to the outer side of the first scanning electrode 11 in the N electrodes and parallel to the first scanning electrode 11. The first dummy scanning electrode 11 is connected to one of the N scanning electrodes in such a manner that the voltage at the first dummy scanning electrode 11a when a scanning signal is applied on the first scanning electrode 11 is equal to the voltage at a scanning electrode 11 in a smaller number of the scanning electrodes adjacent to one scanning electrode 11 when a scanning signal is applied thereon from the second to N-th electrodes. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention is related to a display device.

  In recent years, flat display devices have been put into practical use, and particularly liquid crystal display devices are widely used.

  There are various types of liquid crystal display devices. Here, an active drive type liquid crystal display device having a thin film diode as a switching element will be described as an example.

  FIG. 14 is a perspective view showing the configuration of the liquid crystal display device. FIG. 15 is a plan view of the liquid crystal cell 100 constituting the liquid crystal display device. FIG. 16 is an enlarged view of the vicinity of one display pixel.

  The liquid crystal display device includes a liquid crystal cell 100, a data signal circuit board 7, and a scanning signal circuit board 13, and each of the liquid crystal cell 100, the data signal circuit board 7, and the scanning signal circuit board 13 is a TCP (Tape Carrier Package) system. Are electrically connected to the drive IC chips 8 and 14 depending on the mounting form. FIG. 14 shows a configuration in which three drive IC chips are stacked on the scanning signal circuit side and four on the data signal circuit side. In addition to the TCP method, the COG (Chip On Glass) method has been put into practical use for mounting the driving IC chip.

  As shown in FIG. 15, the liquid crystal cell 100 includes an element side substrate 1 having a thin film diode 4, an opposite side substrate 10, and an optical film 15 typified by a polarizing plate.

  On the element side substrate 1, pixel electrodes 5 are arranged in a matrix at predetermined intervals, each pixel electrode 5 is connected to the signal wiring 2 through the thin film diode 4, and the signal wiring 2 is connected to the element side terminal electrode 6. Has been drawn to. The signal wiring 2 may be bent rather than straight.

  A plurality of stripe-shaped scanning electrodes 11 are arranged on the opposing substrate 10 at a predetermined interval, and each scanning electrode 11 is led out to an opposing terminal electrode 12 provided at the substrate end. Depending on the display pixel arrangement, the scanning electrode 11 may have a bent shape instead of a simple stripe.

  The element-side base 1 and the counter-side substrate 10 are provided with spacers such as plastic beads having a predetermined diameter so that the electrodes face each other and maintain a constant interval after the surface of each electrode is subjected to orientation treatment. The liquid crystal material is sealed in a gap formed between the two substrates.

  As shown in FIG. 16, the thin-film diode 4 includes a lower electrode 2a, an insulator (not shown) formed to cover the lower electrode 2a, and the upper electrode 4, and has a so-called MIM (Metal Insulator Metal) structure. Is. As the constituent material of such an MIM element, Ta is used as the lower electrode 2a, Ta oxide film TaOx as the insulator, and Cr or Ti as the upper electrode. In addition to the structure in which the lower electrode 2a and the upper electrode 4 simply intersect as shown in the figure, a thin film diode 4 having a structure called a diode ring structure or a back to back structure has been proposed.

  In the liquid crystal display device configured as described above, an overlapping region between the pixel electrode 5 and the scanning electrode 11 becomes one display pixel, and the display pixels are arranged in a matrix to form a rectangular display pixel group. Yes. Then, utilizing the property of the thin film diode 4 that the resistance becomes low when a high voltage is applied to both ends and the resistance becomes high when a low voltage is applied, a predetermined signal is sent to the element side terminal electrode 6 and the opposite side terminal. The alignment state of the liquid crystal molecules of each display pixel is controlled by adjusting the signal voltage applied to each display pixel by applying it to the electrode 12, thereby controlling the amount of light transmitted thereby to display a predetermined density. It has become.

  FIG. 17 shows an outline of a driving method of the liquid crystal display device. Generally, as shown in the figure, a scanning signal S having a pulse is sequentially applied to each opposing terminal electrode 12 at different times, At the time when the pulse is given, the display pixel group constituted by the scan electrode 11 is selected, and the data signal D based on the density to be displayed by the display pixel is transmitted from the element side terminal 6 to the signal wiring 2 and the thin film diode 4. Then, so-called time-division driving is performed by giving to the pixel electrode 5 and writing.

Here, the data writing to each pixel electrode 5 is performed only during the selection period T _1, and during the non-selection period T ₂ where the pulse of the scanning signal S is not applied, the data is written by the active element provided in each display pixel. The written state is retained. The display of the entire display screen is realized by writing data with the scanning electrodes 11 constituting the display screen sequentially selected. In many cases, the polarity of the scanning signal S can be switched alternately in units of one scanning time (1 frame = T ₁ + T ₂ ) of the display screen. This is to avoid the deterioration of the liquid crystal material if direct current is continuously applied to the liquid crystal layer. In addition, the polarity of the scanning signal S is often switched between adjacent scanning electrodes 11. This is because when the polarity is switched only in units of one frame, the flickering of the screen due to the polarity difference is easily noticeable, and when the polarity is switched to the scanning electrode 11 unit, the flickering spatial frequency becomes high and the flickering becomes inconspicuous. It is. In the driving method shown in FIG. 17, the polarity switching of the scanning signal S in units of one frame (frame inversion driving) and the polarity switching of the scanning signal S in units of the scanning electrodes 11 (line inversion driving) are performed. It goes without saying that the polarity of the data signal D is also switched in accordance with the switching of the polarity of the scanning signal 11.

There is also a driving method in which the holding voltage V _H is applied during the non-selection period T ₂ . FIG. 18 shows an outline of a driving method for applying the holding voltage V _H during such a non-selection period T ₂ .

The driving method shown in FIG. 18 is almost the same as that shown in FIG. 17 except that the holding voltage V _H (−V _H ) is applied to the scan electrode 11 in the non-selection period T ₂ . This is intended to be performed as easily maintain data written to the pixel electrode during the non-selection period, when performing line inversion driving of the scanning signal S, as shown in FIG. 18, the holding voltage V _H The polarity is also switched on a scan electrode 11 basis.

Incidentally, in the liquid crystal display device arranged two-terminal switching elements such as thin film diodes are effects of a capacitive coupling C _S occurring in the periphery of the display pixel is known that likely to be reflected in the display of the display pixel ( For example, see FIG. In other words, if there is a difference in the arrangement of electrodes around a certain display pixel or a change in peripheral voltage, it will affect the display pixel, resulting in a difference in display density, resulting in uneven display. May occur.

  As an example of the position where such non-uniform display occurs, a display pixel group formed by the first scan electrode and a display pixel group formed by the Nth scan electrode in the case of having N scan electrodes, Can be mentioned. This is because the scanning signal is applied in order from the first scanning electrode to the Nth scanning electrode, but the first scanning electrode and the Nth scanning electrode have scanning electrodes adjacent to only one side thereof. The display pixels to be configured have the number of display pixels adjacent to the display pixels formed by the other scan electrodes (in the case where there are N scan electrodes, each of the scan electrodes from the second to the (N-1) th scan). This is due to the fact that the degree of electrical influence from adjacent display pixels is different compared to other scan electrodes.

  This display density disturbance is relatively small, and even if such a display density disturbance occurs in one display pixel, it is inconspicuous. However, if it occurs in all the display pixels that constitute one scanning electrode, it is noticeable. It becomes easy. In particular, it is easily noticeable in the case of a display based on the display of an intermediate level display density often seen in the display for OA applications.

  On the other hand, Patent Document 1 discloses providing dummy scan electrodes on the outer sides of the first and last regular scan electrodes. Specifically, as shown in FIG. 19, for example, when there are N regular scan electrodes, dummy scan electrodes 11a and 11b and their dummy scans are located at positions corresponding to the 0th and (N + 1) th scan electrodes. Dummy pixel electrodes 5a and 5b opposite to the electrodes 11a and 11b are arranged, and a dummy scanning signal is given to the dummy scanning electrodes 11a and 11b. As a modification, the publication proposes a display device in which the dummy scanning electrode 11a at the 0th position is connected to the dummy scanning electrode 11b at the (N + 1) th position, as shown in FIG.

  Here, in order to drive the dummy scan electrodes 11a and 11b, dummy counter-side terminal electrodes 12a and 12b connected to the dummy scan electrodes 11a and 11b are newly provided, and the dummy counter electrode is used as a scan signal circuit or a driving IC chip. What can drive the side terminal electrodes 12a and 12b must be used.

  However, a driving IC chip that can cope with a new output in addition to the regular output causes a new increase in manufacturing cost. That is, based on the configuration shown in FIG. 19, the driving IC chip on the scanning signal circuit side has only been loaded with three types of chips, but the three types of chips are provided because the dummy counter terminal electrode is provided. You will have to prepare. This is not only a problem that the cost can not be reduced due to the common parts, but it is also necessary to attach three very similar driving IC chips at predetermined positions, and mounting errors are likely to occur in the manufacturing process. It also causes the problem of poor workability. Such a problem also occurs in the configuration shown in FIG. That is, in a display device in which a plurality of driving IC chips of one type are stacked, an increase in manufacturing cost cannot be avoided because dummy signals are output from the dummy scanning electrodes 11a and 11b.

  In Patent Document 2, an active matrix system in which the counter substrate is a common electrode, that is, a liquid crystal display device using a thin film transistor (TFT), is arranged outside the uppermost scanning wiring in order to solve a similar display nonuniformity. A dummy scanning wiring is provided, and the dummy scanning wiring is connected to the lowermost scanning wiring. According to such a configuration, it is not necessary to newly generate a scanning signal unique to the dummy scanning electrode. The contents are described. In this configuration, a considerably large bypass wiring is formed so that the dummy scan electrode outside the uppermost scan electrode is connected to the lowermost scan electrode.

  In Patent Document 3, scanning signal lines and display signal lines are arranged in an XY matrix on the main surface, and thin transistors (TFTs) and pixel electrodes are formed in a region defined by the scanning signal lines and the display signal lines. The liquid crystal display device includes a first substrate, a second substrate provided to face the main surface of the first substrate, and a liquid crystal layer provided between the substrates. A pixel electrode arranged on the outer periphery is made smaller than the shape of the other pixel electrode, and the outermost scanning signal line and the display signal line are moved inward to constitute a non-display dummy pixel. According to such a configuration, it is described that the non-display liquid crystal cell region can be narrowed and the substrate can be effectively used without causing uneven luminance on the image display and a decrease in the sealing performance of the liquid crystal. Yes.

Patent Document 4 discloses a display device in which a dummy pixel electrode with an element is provided outside a display pixel group region, and a strip-like dummy scanning electrode is further provided outside.
JP 2000-47236 A JP-A-9-288260 Japanese Patent Laid-Open No. 9-5780 JP-A-3-45934

An object of the present application is to provide a display device in which a dummy electrode is configured to exhibit a predetermined function.

First, an experiment conducted by the inventors using a liquid crystal cell will be described. FIG. 12 shows an outline of the experiment. Five types of driving conditions for the liquid crystal cell were prepared, and the display state of the liquid crystal cell in each was examined.

  As the liquid crystal cell, a black and white display type of 480 × 320 dots using a thin film diode, a display pixel pitch of 240 μm, and a normally white type optical system with TN mode orientation was used.

  In the experiment, all of the data electrode side of the liquid crystal cell is grounded, the scanning electrode is divided into two regions, one is given an A waveform, the other is given a B waveform, and the voltage is changed at the boundary of each drive waveform region. The display shade of the display pixel (dot) was observed.

  The purpose of this experiment was to investigate the effect of capacitive coupling between display pixels formed by adjacent scanning electrodes on display density. In other words, if any change in display density occurs at the boundary between the two areas driven by the A waveform and the B waveform, it is possible to qualitatively understand under what driving conditions display disturbance occurs. The driving conditions were such that the basic waveform was a B waveform, the A waveform was changed to five types, and the liquid crystal cell was observed. The B waveform which is a basic waveform was a waveform having a pulse corresponding to a scanning signal having a duty of 1/320 and a frame frequency of 60 Hz while changing the polarity.

  Experiment (i) A waveform: A waveform obtained by shifting the B waveform with the same polarity in units of one pulse. This simulates driving only frame inversion in an actual liquid crystal display device.

  Experiment (ii) A waveform: A waveform obtained by shifting the B waveform to the opposite polarity in units of one pulse. This simulates the driving of frame inversion and line inversion in an actual liquid crystal display device.

  Experiment (iii) A waveform: A waveform in which the B waveform has the same polarity and the same timing.

  Experiment (iv) A waveform: A waveform with the B waveform having the opposite polarity and the same timing.

  Experiment (v) A waveform: A waveform with the B waveform grounded.

  The result was as follows.

  Experiment (i) The transmittance of the display pixel constituted by one scanning electrode in both regions in contact with the boundary of the driving region was increased. The lighting state did not change even when the pulse position was shifted with the same polarity.

  Experiment (ii) The transmittance of the display pixel constituted by one scanning electrode in both regions in contact with the boundary of the driving region was increased. The lighting state did not change even when the pulse position was shifted with the reverse polarity.

  Experiment (iii) No change in the transmittance of the display pixel was observed.

  Experiment (iv) The transmittance of the display pixel formed by one scanning electrode in both regions in contact with the boundary of the driving region was increased. This increase in transmittance was greater than in experiments (i) and (ii).

  Experiment (v) The transmittance of the display pixel formed by the scanning electrode book from the A waveform area of the B waveform area increased. This increase in transmittance was equivalent to experiments (i) and (ii).

From the above results, the present inventor obtained the following findings (1), (2), and (3).
(1) Disturbances in display density in display pixels formed by the focused scan electrode are caused by an action caused by a coupling capacitance with a display pixel formed by one adjacent scan electrode.
(2) Disturbance in display density in the display pixel formed by the focused scan electrode is caused by the application of a pulse to the scan electrode (selection period) and is adjacent to the absence of a pulse (non-selection period). The display density of the display pixel formed by the focused scan electrode is not affected by the influence of the applied voltage applied to the scan electrode.
(3) The magnitude of the disturbance in the display density of the display pixel formed by the focused scan electrode is caused by the difference voltage between the applied voltage of the focused scan electrode and the applied voltage of the adjacent scan electrode when the pulse of the focused scan electrode is applied. Larger is bigger.

  In addition, from this experiment, the display density disturbance that occurs in the first scanning electrode (and the final one) in the liquid crystal display device can be considered as follows.

  FIG. 13 is a perspective view showing a portion corresponding to the first to third scan electrodes of the liquid crystal cell.

The scanning signals S ₁ , S ₂ , S ₃ ,... Are supplied in order from the first scanning electrode 11 and the data signal is supplied from the signal wiring 2, but as described with reference to FIG. 17 or FIG. When a pulse of the scanning signal is applied, there is no pulse (or a constant holding voltage) in the adjacent scanning electrode.

  Based on the knowledge (1) obtained from the experimental results described, the display pixels formed by the first scan electrode 11 in which there is only one adjacent scan electrode 11 are affected by the other scan electrodes 11. It is considered that the display density is different because it is smaller than the display pixel to be configured. In the display pixel that is formed by the final scan electrode, there is only one scan electrode adjacent to the display pixel.

  That is, the display density is different between the display pixel constituted by the first (final) scan electrode 11 having a small electrical influence and the display pixels constituted by the second to N-1th scan electrodes 11 having a large influence. It is.

  Since the inventor could not determine whether the cause of the disturbance of the display density is the capacitive coupling generated between the scanning electrodes 11 or the capacitive coupling generated between the pixel electrodes 11, the following experiment was performed. It was. That is, a dummy scan electrode without the pixel electrode 5 is formed on the element side substrate 1 on the counter substrate 10 at the 0th position, and the liquid crystal display device is driven while applying a non-selection potential to the dummy scan electrode. The display density of the display pixels formed by the first scanning electrode 11 was observed. As a result, the degree of improvement in display density disturbance was small compared to the case where the pixel electrode 5 was provided.

This was thought to be caused by the separation distance b (20 μm) between the scanning electrodes 11 being larger than the separation distance a (6 μm in the experiment) between the pixel electrodes 5. Further, although on the element side substrate 1 underlying film such purposes oxide adhesion improvement and etch stop electrode material (also basecoat is referred) 16 is formed, such as Ta ₂ 0 ₅ as the oxide A material having a large relative dielectric constant (20 to 25) is often used. Therefore, it was considered that not only the parasitic capacitance generated near the liquid crystal layer having a relative dielectric constant of 8 to 13, but also the parasitic capacitance generated near the base layer having a large relative dielectric constant was a problem.

From the above, the present inventor obtained the following knowledge (4).
(4) Capacitive coupling that disturbs the display occurs between electrodes having a small separation distance. That is, when a voltage difference occurs between the scan electrode to which the scan signal _Sn is applied and the scan electrode to which the scan signal _{Sn + 1} ( _Sn-1 ) adjacent thereto is applied, the capacitance _{CLC of the} display pixel is changed. capacitive coupling C _S at the distance shorter pixel electrodes 5 to each other through occurs which is disturbed display density.

  The reason why the separation distance a between the pixel electrodes 5 is shorter than the separation distance b between the scanning electrodes 11 is to secure the aperture ratio and prevent a short circuit between the scanning electrodes 11 that are close to each other over a long distance. It is said. In general, the separation distance a is about 4 μm, and the separation distance b is about 10 to 20 μm.

According to the present invention, a matrix is formed by forming a plurality of regular scanning electrodes provided so as to extend in parallel with each other and an electrode group facing each of the plurality of scanning electrodes and arranged along the scanning electrodes. A plurality of regular pixel electrodes arranged in a shape, and a dielectric material layer provided between the scan electrode and the pixel electrode,
A dummy scan electrode having the same configuration as the scan electrode, which is provided so as to be adjacent to the outermost scan electrode among the plurality of scan electrodes and to extend in parallel with the outermost scan electrode;
A plurality of one dummy electrode provided to face the dummy scan electrode and to be arranged along the dummy scan electrode;
Another dummy electrode provided outside the one dummy electrode,
A display device characterized by further comprising:

Another aspect of the present invention is to form a plurality of regular scanning electrodes provided so as to extend in parallel with each other, and an electrode group facing each of the plurality of scanning electrodes and arranged along the scanning electrodes. A plurality of regular pixel electrodes arranged in a matrix, and a dielectric material layer provided between the scan electrodes and the pixel electrodes,
A plurality of dummy electrodes provided adjacent to the outermost plurality of pixel electrodes along at least one side of the region in which the plurality of pixel electrodes are arranged in a matrix;
Another dummy electrode provided outside the one dummy electrode, and
Further comprising
The one dummy electrode is a display device characterized in that an outer dimension of the planar shape thereof is the same as that of the pixel electrode, while the other dummy electrode is different from the pixel electrode in an outer dimension of the planar shape. is there.

Another aspect of the present invention is to form a plurality of regular scanning electrodes provided so as to extend in parallel with each other, and an electrode group facing each of the plurality of scanning electrodes and arranged along the scanning electrodes. A plurality of regular pixel electrodes arranged in a matrix, and a dielectric material layer provided between the scan electrodes and the pixel electrodes,
A plurality of dummy electrodes provided adjacent to the outermost plurality of pixel electrodes along at least one side of a region in which the plurality of pixel electrodes are arranged in a matrix;
Another dummy electrode provided outside the one dummy electrode, and
Further comprising
In the one dummy electrode, the distance between the adjacent outermost pixel electrodes is the same as the distance between the electrode groups,
The other dummy electrode is a display device characterized in that an outer dimension of the planar shape is different from that of the pixel electrode.

Another aspect of the present invention is to form a plurality of regular scanning electrodes provided so as to extend in parallel with each other, and an electrode group facing each of the plurality of scanning electrodes and arranged along the scanning electrodes. A plurality of regular pixel electrodes arranged in a matrix, and a dielectric material layer provided between the scan electrodes and the pixel electrodes,
A plurality of dummy electrodes provided adjacent to the outermost plurality of pixel electrodes along at least one side of the region in which the plurality of pixel electrodes are arranged in a matrix;
Another dummy electrode provided outside the plurality of one dummy electrode,
Further comprising
In the one dummy electrode, the distance between the adjacent outermost pixel electrodes is the same as the distance between the electrode groups,
The other dummy electrode is a display device characterized in that an outer dimension of a planar shape thereof is different from that of the one dummy electrode.

In the present invention and other present invention, the other dummy electrode may be formed to extend in a direction in which the plurality of dummy electrodes are arranged. In this case, a plurality of the other dummy electrodes may be arranged in parallel.

According to the present invention and another aspect of the present invention, the other dummy electrodes are provided so that a plurality of the dummy electrodes are arranged along the plurality of dummy electrodes, and an outer dimension of the planar shape is larger than that of the one dummy electrode. May be small.

In the present invention and other present invention, the other dummy electrode may be a transmittance adjusting electrode around the display pixel group region.

In the present invention and other present invention, the other dummy electrode may be a reflectance adjusting electrode around the display pixel group region.

In the present invention and other present invention, the other dummy electrode may be a color adjusting electrode around the display pixel group region.

In the present invention and other present invention, the other dummy electrode may be formed of the same material as the pixel electrode.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a liquid crystal display device will be described with reference to the accompanying drawings. In the description, expressions such as “to the main scanning electrode” are frequently used, but unless otherwise specified, they are counted in order from the top of the drawing.

(First embodiment)
FIG. 1 is a plan view of a liquid crystal cell 100 of the liquid crystal display device according to the first embodiment. FIG. 1 shows a state in which the opposing substrate 10 is disposed in front of the paper surface and the element substrate 1 is disposed in the back of the paper surface. FIG. 2 is an enlarged perspective view of the liquid crystal cell 100 and shows the vicinity of the first dummy scanning electrode 11a. FIG. 3 shows drive waveforms applied to the scan electrodes.

  The liquid crystal cell 100 includes an element side substrate 1 and an opposite side substrate 10 provided so as to face each other, and a liquid crystal layer (dielectric material layer) provided so as to be sandwiched between both the substrates. Become.

  Pixel electrodes 5 are arranged in a matrix at predetermined intervals on the liquid crystal layer side of the element side substrate 1. Each pixel electrode 5 is connected to the signal wiring 2 through the thin film diode 4, and the signal wiring 2 is drawn out to the element side terminal electrode 6.

  N regular scanning electrodes 11 having a predetermined size are provided at an interval on the liquid crystal layer side of the opposing substrate 10, and each scanning electrode 11 is connected to the opposing terminal electrode 12. The numerical value of N follows a predetermined display pixel format, but is usually an even number such as 120, 160, 240, 320, 480, 600, 768, 1024, or 1200.

  The element-side substrate 1 and the counter-side substrate 10 are each subjected to an alignment process, and then maintain a predetermined interval by using a spacer (not shown) through the sealing material 9 and also perform signal wiring. 2 and the direction in which the scanning electrode 11 extends are perpendicular to each other and the pixel electrode 5 and the scanning electrode 11 are bonded to each other, and a plurality of pixel electrodes 5 arranged in the direction in which the scanning electrode 11 extends are an electrode group. Is configured. A liquid crystal material is sealed in the gap between the two substrates, which constitutes a liquid crystal layer, and in the liquid crystal layer, liquid crystal molecules are in a predetermined alignment state. One display pixel is defined by the pixel electrode 5, the scanning electrode 11, and the liquid crystal layer therebetween.

  An optical film 15 such as a polarizing plate is attached to the opposite side substrate 10 on the side opposite to the liquid crystal layer side. A light shielding film 17 is provided around the display pixel group region on the liquid crystal layer side of the counter substrate 10.

  In the present embodiment, the first dummy scan electrode 11a and the Nth scan electrode are located at the position corresponding to the 0th scan electrode outside the first scan electrode 11 on the liquid crystal layer side (on the light shielding film 17) of the counter substrate 10. The second dummy scanning electrode 11b is provided with the same size and the same material as the regular scanning electrode 11 at the position corresponding to the (N + 1) th scanning electrode outside. Further, the distance d between the dummy scan electrodes 11a and 11b and the regular scan electrode 11 is the same as the distance b between the regular scan electrodes 11.

  On the liquid crystal layer side of the element-side substrate 1 facing through the liquid crystal layer of the first dummy scanning electrode 11a, each is adjacent to the electrode group of the pixel electrode 5 in the first row facing the first scanning electrode 11. An electrode group of a first dummy pixel electrode 5a having a thin film diode 4a is provided. Similarly, on the liquid crystal layer side of the element-side substrate 1 facing through the liquid crystal layer of the second dummy scanning electrode 11b, the electrode group of the pixel electrode 5 in the Nth row facing the Nth scanning electrode 11 is formed. Adjacent to each other, an electrode group of second dummy pixel electrodes 5b each having a thin film diode (not shown) is provided. The dimensions and materials of the first dummy pixel electrode 5 a corresponding to the first dummy scanning electrode 11 a and the thin film diode 4 a included in the first dummy pixel electrode 5 a are the same as those of the regular pixel electrode 5 and the thin film diode 4. Similarly, the dimensions and materials of the second dummy pixel electrode 5 b corresponding to the second dummy scanning electrode 11 b and the thin film diode (not shown) included in the second dummy pixel electrode 5 b are the same as those of the regular pixel electrode 5 and the thin film diode 4. Further, the separation distance c between the regular pixel electrode 5 and the dummy pixel electrode 5 a is the same as the separation distance a between the regular pixel electrodes 5. That is, the dimensions of the first dummy pixel electrode 5a corresponding to the first dummy scanning electrode 11a are the same as those of the regular pixel electrode 5, and the second dummy pixel electrode 5b corresponding to the second dummy scanning electrode 11b. The dimensions are the same as those of the regular pixel electrode 5.

  That is, the formation of the first and second dummy scanning electrodes 11a and 11b, the first and second dummy pixel electrodes 5a and 5b, and the thin film diode 4a included in the first and second dummy scanning electrodes 11a and 11b is a photomask used for manufacturing the substrate of the conventional liquid crystal cell 100. It can be easily realized only by changing the above. As shown in FIG. 2, the distance c between the first dummy pixel electrode 5a and the regular pixel electrode 5 is preferably shorter than the distance d between the first dummy scan electrode 11a and the regular scan electrode 11. In many cases, the exposure apparatus used for patterning the electrodes on the opposite substrate 10 has a resolution of about 10 μm, such as a proximity exposure apparatus, and the scanning electrodes 11 are separated at such a distance as to cause capacitive coupling efficiently. This is because there are inconveniences in manufacturing for processing. Even if the separation distance can be shortened, since the scanning electrodes 11 are arranged in parallel at a long distance, there is an increased risk of a short circuit due to a foreign substance. Therefore, it is not preferable. On the other hand, the exposure apparatus used for patterning the electrodes on the element-side substrate 1 is often an exposure apparatus having a resolution of about 4 μm, such as a stepper exposure apparatus, and can conveniently process the separation distance of the pixel electrodes 5 sufficiently. It is. Further, even if the pixel electrodes 5 are short-circuited due to a foreign substance, it is easy to specify the short-circuited location, so that correction is easy, and there is no inconvenience in manufacturing.

  Here, the structure of the liquid crystal cell 100 according to the present embodiment is characterized in that the first dummy scanning electrode 11a is connected to the second regular scanning electrode 11 and the second dummy scanning electrode 11b is the N-1th. Is connected to the regular scanning electrode 11.

  The reason for such connection will be described below.

Figure 3 is a scanning signal S _n to be applied to each of the normal scan electrodes 11 (n = 1 to 8, this figure is a is the case of the number N = 8 of the normal scan electrodes hereinafter).

This figure shows a scanning signal having a typical frame inversion and line inversion conventionally performed. That is, a certain scanning signal S _n which focuses has a selection period in which the magnitude voltage of V _S is applied to one frame, and a non-selection period the voltage of 0V is applied, the polarity of the voltage of selection period Are switched for each frame, and a scanning signal _Sn and an adjacent scanning signal _Sn-1 or _{Sn + 1} are shifted in the selection period by one selection period. The polarities of the voltages are reversed from each other.

  Now, according to the knowledge (2) and knowledge (3) obtained by the inventors from experiments, in order to prevent display density abnormality from occurring in the display pixels formed by the first and N-th regular scanning electrodes 11. The capacitive coupling between adjacent scanning electrodes 11 is caused by capacitive coupling generated in the case of a display pixel constituted by other regular scanning electrodes (that is, scanning electrodes from the second to the (N-1) th scanning) 11. What is necessary is just to be equal to an effect.

A scanning signal S _n (n = 2 to N−1) applied to the normal scanning electrode 11 constituting the display pixel exhibiting normal density, and a scanning signal S applied to the two scanning electrodes 11 adjacent thereto. comparing _n-1 and S _{n + 1,} when a scan signal S _n is in the selected state, it can be seen that S _n-1 and S _{n + 1} is always zero. This is a feature of so-called time-division driving.

  In other words, the scanning electrode 11 in the selected state has two capacitive couplings between the two adjacent scanning electrodes 11 in the non-selected state via the capacitance of the liquid crystal layer.

Therefore, if the scanning signal S ₀ to be applied to the first dummy scanning electrode 11a has a voltage of at least 0 V when the scanning signal S ₁ is applied to the _first regular scanning electrode 11 and is in a selected state. Good. In FIG. 3, the voltage to be satisfied by the scanning signal S ₀ is indicated by a thick line, and the other portions are indicated by thin lines. The same applies to the scanning signal S _{8 + 1} to be applied to the second dummy scanning electrode 11b. In FIG. 3, the portion that should be a voltage of 0 V is indicated by a bold line, and the other portion is indicated by a thin line. In FIG. 3, the scanning signal having the amplitude V _S centered on 0V has been described. However, as apparent from the above description, the same description can be made even when the center voltage of the amplitude is not 0V. That is, the scanning signal S ₀ to be applied to the first dummy scanning electrode 11a has a minimum voltage in the non-selected state when the scanning signal S ₁ is applied to the _first regular scanning electrode 11 to be in the selected state. Just have it. Further, the scanning signal S _{8 + 1} to be applied to the second dummy scanning electrode 11b is the voltage in the non-selected state when the scanning signal S ₈ is applied to the _eighth regular scanning electrode 11 to enter the selected state. It is enough to have at least.

More first dummy scan electrodes 11a scanning signal to be applied to the scan signal S ₀ and the second dummy scanning electrodes 11b to be applied to S _{8 + 1} condition to be satisfied is found as.

Here, the fact that the scanning signal S ₀ is partially should have a voltage of non-selected state (in FIG. 3 0V), during the non-selection state to another scan signal S _n a voltage (in FIG. 3 0V) Pay attention to both the existence of the inclusion part. Then, it is found can be used as one of the scanning signal S _n is also S ₀ to S ₂ to S _8. This is because the scanning signals S _{2 to} S ₈ are all in the non-selected state (0 V) when the scanning signal S ₁ is in the selected state. Accordingly, the first dummy scanning electrode 11a can be connected to any one of the second to eighth regular scanning electrodes. Further, the second dummy scanning electrode 11b can be connected to any one of the first to seventh regular scanning electrodes for the same reason.

  Here, the regular scan electrode 11 to be connected to the first dummy scan electrode 11a and the regular scan electrode 11 to be connected to the second dummy scan electrode 11b can be freely selected as long as the above conditions are satisfied. . In an extreme example, the regular scan electrode 11 to which the first dummy scan electrode 11a is connected can be matched with the regular scan electrode 11 to which the second dummy scan electrode 11b is connected. However, in implementation, it is preferable to shorten the connection distance in consideration of problems such as disconnection. For example, the first dummy scan electrode 11a is one of the first half (second to fourth) of the regular scan electrode 11 group, and the second dummy scan electrode 11b is the second half (fifth to seventh) of the regular scan electrode 11 group. It is good to connect it to one of them.

  In FIG. 3, the case of N = 8 has been described, but the above connection condition can be applied to all the liquid crystal cells 100 having an arbitrary number of regular scanning electrodes 11. That is, the first dummy scan electrode 11a is connected to any one of the regular scan electrodes 11 other than the first one, and the second dummy scan electrode 11b is any one of the regular scan electrodes 11 other than the Nth regular scan electrode 11. It is sufficient to make it connect to.

  Therefore, according to the present embodiment, it is not necessary to provide new opposing terminal electrodes for the first and second dummy scanning electrodes 11a and 11b on the opposing substrate 10, and the first and second dummy scanning electrodes 11a, 11b, Scan signals applied respectively to 11b can be prepared. As a result, it is possible to obtain a display device in which all the display pixels formed by the normal scanning electrodes 11 from the first to the Nth display have a uniform display density.

  Further, even if a plurality of driving IC chips provided on the opposite substrate 10 are necessary, it is only necessary to use one type of IC chip. Will be good.

  The first dummy scanning electrode 11a has the first dummy pixel electrode 5a through the liquid crystal layer, and the second dummy scanning electrode 11b has the second dummy pixel electrode 5b through the liquid crystal layer. When the device is driven, some kind of display is performed, and this display is unpleasant in appearance. However, in this embodiment, they are covered with the light shielding film 17 so that the user of the display device cannot directly see. ing. The light shielding film 17 may be provided not on the counter substrate 10 but on the element substrate 1 side, or on the outer surface of the display device. Such a light-shielding film 17 is often provided in a conventional display device, particularly a display device that performs color display, and those skilled in the art have substantially no inconvenience of providing the light-shielding film 17.

  In addition, since the first and second dummy pixel electrodes 5a and 5b having a short distance from adjacent ones are provided, according to the knowledge (4), the existence thereof is very effective for causing capacitive coupling. It becomes.

  Further, since the separation distance c between the first and second dummy pixel electrodes 5a and the regular pixel electrode 5 is the same as the separation distance a between the regular pixel electrodes 5, the first and second dummy pixel electrodes 5a The coupling capacitance generated between the regular pixel electrodes 5 is equal to the capacitive coupling generated between the regular pixel electrodes 5, and the capacitance of the liquid crystal layer corresponding to the first and second dummy pixel electrodes 5a. Since the capacitance of the liquid crystal layer corresponding to the regular pixel electrode 5 is the same, the constant of the equivalent circuit of one display pixel is equal between the regular pixel electrode 5 and the first and second dummy pixel electrodes 5a. Capacitive coupling can ideally occur equally around the display pixel.

  Here, the dummy pixel electrode 5a relates to capacitive coupling formation, and the outer dimension of the planar shape may be the same as that of the regular pixel electrode 5, and the material thereof is not necessarily the same as that of the regular pixel electrode 5. There is no. For example, as shown in FIG. 4, the first dummy pixel electrode 5a is formed of the same material (for example, IT0) as the material of the regular pixel electrode 5, and is further made of an upper electrode material (for example, Ti) with substantially the same size for light shielding. The light shielding portion 3a may be provided using the above. The light shielding portion 3a is formed for the purpose of covering the display of the first dummy pixel electrode 5a so as not to be visible to the user.

  Further, symbols may be provided on the first and second dummy pixel electrodes 5a and 5b. Since it is difficult to distinguish between the first and second dummy pixel electrodes 5a and 5b and the regular pixel electrode 5, the first and second dummy pixel electrodes 5a and 5b which are defective at the time of inspection during the manufacturing process of the element side substrate 1 are mistakenly detected. There is a possibility that the regular pixel electrode 5 is determined to be defective and the liquid crystal cell 100 is erroneously determined to be defective. Therefore, in the region of the first and second dummy pixel electrodes 5a and 5b, for example, “D” is clearly shown, and a symbol indicating that the first and second dummy pixel electrodes 5a and 5b are clearly cut is partially cut off. Such misjudgment can be avoided by providing the missing shape or patterning with another material.

  In addition, since capacitive coupling is mainly a component that occurs near the end of the electrode, there is no functional problem even if there is a partial defect or irregularity in the center of the dummy pixel electrode. The dummy pixel electrode 5a may have such a configuration.

(Second Embodiment)
FIG. 5 is a plan view of the liquid crystal cell 100 of the liquid crystal display device according to the second embodiment. FIG. 5 shows a state in which the opposing substrate 10 is disposed in front of the paper surface and the element side substrate 1 is disposed at the back of the paper surface. FIG. 6 shows a drive waveform applied to the scan electrode 11.

  The liquid crystal cell 100 is substantially the same as the structure shown in the first embodiment, and description of components having the same shape and the same reference numerals is omitted.

  A feature of the structure of the liquid crystal cell 100 according to the present embodiment is that the first dummy scan electrode 11a is connected to the third regular scan electrode, and the second dummy scan electrode 11b is N-2th regular scan electrode. Is connected. That is, the connection destination of the first and second dummy scanning electrodes 11a and 11b is different from that of the first embodiment.

The liquid crystal display device of the present embodiment, as shown in FIG. 6, holds the voltage of the scanning signal S _n is the non-selection period + V _H (-V _H), and performs frame inversion and line inversion . In such a case, it should be noted that the voltage conditions to be applied to the first and second dummy scanning electrodes 11a and 11b are different from those in the first embodiment.

  The reason why the connection destination of the first and second dummy scanning electrodes 11a and 11b is different from that of the first embodiment will be described below in relation to the voltage condition to be applied to them.

6, scanning signals S _n applied to each of the normal scan electrodes 11 (n = 1 to 8, this figure is a is the case of the number N = 8 of the normal scan electrodes hereinafter).

The figure shows a scan signal S _n with a typical frame inversion and line inversion is conventional. I.e. the scan signal S _n which focuses has a selection period in which the voltage of the magnitude of V _S to one frame is applied, and a non-selection period the voltage V _H or -V _H is maintained, the voltage of the polarity has been switched every frame, also the scanning signal S _n-1 or S _{n + 1} adjacent to the scan signal S _n which is, together with the timing of the selection period are shifted one by one selection period, the voltage The polarities of the two are reversed.

  Now, according to the findings (2) and (3) obtained by the inventors from the experiments, in order to prevent display density abnormality from occurring in the display pixels formed by the first (Nth) normal scanning electrode 11. In this case, the operation between the adjacent scan electrodes 11 is made equal to the operation that occurs in the case of a display pixel constituted by other regular scan electrodes (that is, the second to (N-1) th scan electrodes) 11. That's fine.

The scanning signal _{S n (n = 2~N-1} ) applied to the normal scan electrodes 11 constituting the display pixels exhibiting the normal concentration, it is applied to the two scan electrodes 11, 11 adjacent thereto scan comparing the signals S _n-1 and S _{n + 1,} when a scan signal S _n is in the selected state, the combination of the voltage applied to the S _n-1 and S _{n + 1,} the + V _H and -V combination of _H, or be a combination of -V _H and + V _H.

  In other words, the scan electrode 11 in the selected state has two capacitive couplings between the two adjacent scan electrodes 11 and 11 in the non-selected state via the capacitance of the liquid crystal layer in the first embodiment. Although the form is the same, the two capacitive couplings are not the same.

Therefore, the scanning signal S ₀ to be applied to the first dummy scanning electrode 11a is the second regular scanning electrode 11 when the scanning signal S ₁ applied to the first regular scanning electrode 11 is selected. It is necessary to switch according to the voltage applied to. Specifically, the scan signal S ₀ is −V _H when the voltage applied to the second regular scan electrode is + V _H , and the voltage applied to the second regular scan electrode is −V. _{When H} , it is necessary to have + V _H. In FIG. 6, the voltage to be satisfied by the scanning signal S ₀ is indicated by a thick line, and the other part is indicated by a thin line. The same applies to the scanning signal S _{8 + 1} to be applied to the second dummy scanning electrode 11b. The portion of the voltage to be satisfied in FIG. 6 is indicated by a bold line, and the other portion is indicated by a thin line. Although described with reference to the scanning signal having an amplitude V _S around the 0V 6, as is clear from the above description, it can be described as the same even when the center voltage of the amplitude is not 0V. That is, the scanning signal S ₀ to be applied to the first dummy scanning electrode 11a is the second regular scanning electrode 11 when the scanning signal S ₁ applied to the first regular scanning electrode 11 is selected. Needs to have either + V _H or −V _H opposite to the voltage of the scanning signal S ₂ applied to. The scan signal S _{8 + 1} to be applied to the second dummy scan electrode 11b is the seventh regular scan electrode when the scan signal S ₈ applied to the eighth regular scan electrode is in the selected state. Needs to have either + V _H or −V _H opposite to the voltage of the scanning signal S ₇ applied to. As described above, the conditions to be satisfied by the scanning signal S ₀ to be applied to the first dummy scanning electrode 11a and the scanning signal S _{8 + 1} to be applied to the second dummy scanning electrode 11b have been found.

Here, it is necessary that the scanning signal S ₀ partially has a voltage that is not selected (+ V _H or −V _{H in} FIG. 6), and that another scanning signal _Sn is not selected (in FIG. 6, whether it is + V _H or not). Note both that there is a portion containing the voltage of -V _H ). Then, S _3, S _5, one of the scanning signal S _n of S ₇ also shows that can be used as S _0. This is because the scanning signals S ₃ , S ₅ , and S ₇ all have a voltage of + V _H or −V _H opposite to the scanning signal S ₂ when the scanning signal S ₁ is in the selected state. Therefore, the first dummy scanning electrode 11a can be connected to any one of the third, fifth, and seventh regular scanning electrodes. The second dummy scan electrode 11b can be connected to any one of the second, fourth, and sixth regular scan electrodes for the same reason.

  Here, the regular scanning electrode 11 to which the first dummy scanning electrode 11a is connected and the regular scanning electrode 11 to which the second dummy scanning electrode 11b is connected can be freely selected as long as the above conditions are satisfied. For example, it may be selected in consideration of problems such as disconnection.

  In FIG. 6, the case of N = 8 has been described, but the above connection condition can be applied to all the liquid crystal cells 100 having an arbitrary number of regular scanning electrodes 11. That is, the first dummy scan electrode 11a is connected to any one of the odd-numbered regular scan electrodes 11 other than the first, and the second dummy scan electrode 11b is connected to the even-numbered regular scan electrode 11 other than the Nth. What is necessary is just to connect to any one of these.

In the present embodiment, the case of the scanning signal S _n polarity is switched for each line, it can be applied even when the polarity is inverted every N lines. The following should be taken into consideration for more wide application. That is, when the scanning signal S _n which is applied to the scanning electrodes 11 of the focused normal is in the selected state, the scanning signal S _n-1 and S _{n + 1} are applied next to the scan electrodes 11 are shown The regular scan electrode 11 that is the connection destination of the first dummy scan electrode 11a and the regular scan electrode that is the connection destination of the second dummy scan electrode 11b so that the combination of voltages is the same for any regular scan electrode 11. 11 may be selected.

In addition, the connection form between the first and second dummy scan electrodes 11a and 11b and the regular scan electrode 11 in the present embodiment does not hold the voltage of + V _H or −V _H during the non-selection period. Needless to say, the drive waveform in the embodiment can also be applied. This is because the driving waveform of the first embodiment corresponds to the case of + V _H = −V _H (= 0) in the present embodiment.

  Other functions and effects are the same as those of the first embodiment.

(Third embodiment)
FIG. 7 is a plan view of a modification of the liquid crystal cell 100 of the liquid crystal display device according to the first embodiment. FIG. 7 shows a state in which the opposing substrate 10 is disposed in front of the paper surface and the element side substrate 1 is disposed at the back of the paper surface.

  In the first and second embodiments described above, the connection destination of the first dummy scan electrode 11a and the connection destination of the second dummy scan electrode 11b are appropriately selected according to the drive waveform applied to the regular scan electrode 11. Yes.

  These connection forms can be obtained by slightly refining the basic pattern of the scanning electrode 11, but it is also required to present a more flexible connection form. For example, as shown in FIG. 7, when it is necessary to connect the first and second dummy scanning electrodes 11a and 11b and the regular scanning electrode 11 over a long distance, there is a problem of voltage drop due to disconnection or increased wiring resistance. It is expected that the first and second dummy scan electrodes 11a and 11b will not perform the expected operation.

  The liquid crystal cell 100 shown in FIG. 7 differs from the first embodiment in that the number of terminals (number of electrodes) is different from that of the first embodiment, but the basic configuration is the same as that of the liquid crystal cell 100 of the first embodiment. It is the same configuration. The first dummy scan electrode 11a is connected to the Nth (N = 8) regular scan electrode 11, and the second dummy scan electrode 11b goes around the outside of the first dummy scan electrode 11a and the first regular scan. The difference is that it is connected to the electrode 11. This is an example of the longest possible connection among the connection modes shown in the first embodiment.

  Such connection is not a problem if, for example, the conductive thin film constituting the scan electrode 11 is a material having a sufficiently small specific resistance such as Al. However, the material of the scan electrode 11 is not necessarily Al, and in order to realize a connection with low resistance, the manufacturing process of the counter substrate 10 is increased, and a low resistance thin film is newly formed and a photoresist is applied. , Exposure, development, etching and resist stripping are necessary, which is a serious disadvantage in manufacturing.

  Therefore, the inventor paid attention to the point that the connection between the first and second dummy scanning electrodes 11a and 11b and the regular scanning electrodes 11 and 11 does not require dimensional accuracy.

  That is, it has been conceived that the wiring constituting the connection is made of the conductive material existing on the element side substrate 1 instead of the conductive material existing on the counter side substrate 10.

  FIG. 8 is a plan view showing the liquid crystal cell 100 of the liquid crystal display device according to Embodiment 3 in which such a new connection has been made. FIG. 8 shows a state in which the opposite substrate 10 of the liquid crystal cell 100 is disposed in front of the sheet and the element substrate 1 is disposed in the depth of the sheet.

  The liquid crystal cell 100 includes an element side substrate 1 and an opposite side substrate 10 provided so as to face each other, and a liquid crystal layer (dielectric material layer) provided so as to be sandwiched between both the substrates. Become.

  Pixel electrodes 5 are arranged in a matrix at predetermined intervals on the liquid crystal layer side of the element side substrate 1. Each pixel electrode 5 is connected to the signal wiring 2 through a thin film diode (not shown), and the signal wiring 2 is drawn out to the element side terminal electrode 6.

  N regular scanning electrodes 11 having a predetermined size are provided at an interval on the liquid crystal layer side of the opposing substrate 10, and each scanning electrode 11 is connected to the opposing terminal electrode 12.

  The element-side substrate 1 and the counter-side substrate 10 are each subjected to an alignment process, and then maintain a predetermined interval by using a spacer (not shown) through the sealing material 9 and also perform signal wiring. 2 and the direction in which the scanning electrode 11 extends are perpendicular to each other and the pixel electrode 5 and the scanning electrode 11 are bonded to each other, and a plurality of pixel electrodes 5 arranged in the direction in which the scanning electrode 11 extends are an electrode group. Is configured. A liquid crystal material is sealed in the gap between the two substrates, which constitutes a liquid crystal layer, and in the liquid crystal layer, liquid crystal molecules are in a predetermined alignment state. One display pixel is defined by the pixel electrode 5, the scanning electrode 11, and the liquid crystal layer therebetween.

  Further, on the opposite substrate 10 on the liquid crystal layer side, the first dummy scanning electrode 11 a is positioned outside the first scanning electrode 11 and the N + 1th corresponding position outside the Nth scanning electrode 11. Two dummy scanning electrodes 11b are provided.

  Further, on the liquid crystal layer side of the element side substrate 1, an electrode group of the first dummy pixel electrodes 5 a arranged opposite to the first dummy scanning electrode 11 a through the liquid crystal layer and arranged along the same is provided. Each first dummy pixel electrode 5a is connected to the signal wiring 2 through a thin film diode (not shown). Similarly, on the liquid crystal layer side of the element side substrate 1, an electrode group of second dummy pixel electrodes 5 b is provided so as to face the second dummy scanning electrode 11 b through the liquid crystal layer and are arranged along the same. Each second dummy pixel electrode 5b is also connected to the signal wiring 2 through a thin film diode (not shown). These first and second dummy pixel electrodes 5 a and 5 b have the same configuration and dimensions as the regular pixel electrode 5.

  An optical film 15 (not shown) such as a polarizing plate is attached to the opposite side of the opposite substrate 10 from the liquid crystal layer side.

In the liquid crystal cell 100 according to the present embodiment, the first dummy scanning electrode 11a is connected to the Nth regular scanning electrode 11, and this connection is made through the following elements (A1) to (A7). Has been realized.
(A1) First dummy scanning electrode 11a
(A2) An extraction electrode 20a extending from the first dummy scanning electrode 11a and drawn to the outer corner of the sealing material 9
(A3) Conductive material 19a provided so as to be in contact with the extraction electrode 20a of the opposite substrate 10
(A4) An electrode 18a provided on the element-side substrate 1 so that one end is in contact with the conductive material 19a and extends in a direction orthogonal to the direction in which the scanning electrode extends.
(A5) Conductive material 19b provided in contact with the other end of the electrode 18a of the element side substrate 1
(A6) An extraction electrode 20b extending from the Nth regular scanning electrode 11 so as to be in contact with the conductive material 19b and drawn out to the outer corner of the sealing material 9
(A7) N-th regular scanning electrode 11.

The second dummy scan electrode 11b is connected to the first regular scan electrode 11, and this connection is realized through the following elements (B1) to (B7).
(B1) Second dummy scanning electrode 11b
(B2) A take-out electrode 20c extending from the second dummy scanning electrode 11b and drawn to the outer corner of the sealing material 9
(B3) Conductive material 19c provided in contact with the extraction electrode 20c of the opposite substrate 10
(B4) An electrode 18b provided on the element-side substrate 1 so that one end is in contact with the conductive material 19c and extends in a direction orthogonal to the direction in which the scanning electrode extends.
(B5) Conductive material 19d provided in contact with the other end of the electrode 18b of the element side substrate 1
(B6) An extraction electrode 20d extending from the first regular scanning electrode 11 so as to be in contact with the conductive material 19d and drawn out to the outer corner of the sealing material 9
(A7) First regular scanning electrode 11.

  As said electrically conductive materials 19a-19d, the particle | grains which coated the conductive material on the carbon paste and the surface can be used, for example.

  The electrodes 18 a and 18 b can be formed by using at least one of electrode materials constituting the pixel electrode 5 inside the element side substrate 1, a thin film diode (not shown) and the signal wiring 2. As this electrode material, for example, Ta, Ti, and Cr can be used, and these single layer films and laminated films can be used.

  Therefore, according to the present embodiment, the connection between the first dummy scan electrode 11a and the regular scan electrode 11 can be made low resistance, and the connection between the second dummy scan electrode 11b and the regular scan electrode 11 can also be made low resistance. Can be. This is because most of the paths constituting the connection between the first and second dummy scanning electrodes 11 a and 11 b and the regular scanning electrodes 11 and 11 are constituted by the electrodes 18 a and 18 b on the element side substrate 1. It is.

  The take-out electrodes 20a to 20d of the counter substrate 10 and the electrodes 18a and 18b on the element substrate 1 can be formed by changing a photomask used in a conventional manufacturing method. The connection between the take-out electrodes 20a to 20d of the opposing substrate 10 and the electrodes 18a and 18b of the element side substrate 1 requires a change in the shape of the sealing material 9 and the application of the conductive materials 19a to 19d. Only the application of the materials 19a to 19d is added to the manufacturing process and is not difficult for those skilled in the art.

  Further, instead of not changing the shape of the sealing material 9, conductive particles are contained in the sealing material 9, and the connection between the take-out electrodes 20 a to 20 d of the opposing substrate 10 and the electrodes 18 a and 18 b of the element-side substrate 1 is performed. 9 may be used.

  As described above, the present embodiment has presented a method that can be realized with low resistance even when the connection between the first and second dummy scanning electrodes 11a and 11b and the regular scanning electrodes 11 and 11 is a long distance. In the configuration of the present embodiment, the liquid crystal cell 100 has a large outer shape, or the connection between the first and second dummy scanning electrodes 11a and 11b and the regular scanning electrode 11 is a high-resistance material or the connection width is narrow. Even in this case, there can be no inconvenience. That is, there is also an effect that the degree of freedom can be increased in the design of the electrode pattern.

  Other functions and effects are the same as those of the first embodiment.

(Fourth embodiment)
FIG. 9 is a plan view of the liquid crystal cell 100 of the liquid crystal display device according to the fourth embodiment. FIG. 9 shows a state in which the opposing substrate 10 is disposed in front of the paper surface and the element side substrate 1 is disposed at the back of the paper surface.

  In the first to third embodiments, the element-side terminal electrode 6 and the counter-side terminal electrode 12 are shown in the form of being taken out to individual sides. However, the electrode structure is not limited to this form. As shown in FIG. 9, the device-side terminal electrode 6 and the counter-side terminal electrode 12 may be applied to one side (lower side in the drawing) around the liquid crystal cell 100.

  The liquid crystal cell 100 includes an element side substrate 1 and an opposite side substrate 10 provided so as to face each other, and a liquid crystal layer (dielectric material layer) provided so as to be sandwiched between both the substrates. Become.

  Pixel electrodes 5 are arranged in a matrix at predetermined intervals on the liquid crystal layer side of the element side substrate 1. Each pixel electrode 5 is connected to the signal wiring 2 through a thin film diode (not shown), and each signal wiring 2 extends to the sealing material 9 on one side of the liquid crystal cell 100 below the plane of the paper, and the element side terminal electrode 6. It is connected to the.

  A regular scanning electrode 11 and first and second dummy scanning electrodes 11a and 11b are formed on the opposite substrate 10 on the liquid crystal layer side with predetermined dimensions and intervals. Half of the regular scanning electrodes 11 extend to the left and right of the paper surface and extend to the sealing material 9 on one side of the liquid crystal cell 100 below the paper surface while changing the direction extending 90 ° at the left end. In addition, they are each connected to a counter-side terminal electrode 12 provided on the element-side substrate 1 via conductive particles contained in the sealing material 9. On the other hand, the other half regular scanning electrodes 11 extend in the left-right direction on the paper surface and extend to the sealing material 9 on one side of the liquid crystal cell 100 below the paper surface while changing the direction extending 90 ° at the right end. In addition, they are each connected to a counter-side terminal electrode 12 provided on the element-side substrate 1 via conductive particles contained in the sealing material 9. The first dummy scanning electrode 11a is connected to one predetermined regular scanning electrode 11 located substantially in the center of the regular scanning electrode 11 group. The second dummy scan electrode 11b is connected to one predetermined regular scan electrode 11 located substantially in the center of the regular scan electrode 11 group.

  The element-side substrate 1 and the counter-side substrate 10 are each subjected to an alignment process, and then maintained at a predetermined interval using a spacer (not shown) through the seal material 9 and the signal wiring 2 The pixel electrode 5 and the scan electrode 11 are bonded to each other so that the extending direction of the scanning electrode 11 and the scanning electrode 11 are orthogonal to each other, and the pixel electrode 5 and the scanning electrode 11 face each other. It is composed. A liquid crystal material is sealed in the gap between the two substrates, which constitutes a liquid crystal layer, and in the liquid crystal layer, liquid crystal molecules are in a predetermined alignment state. One display pixel is defined by the pixel electrode 5, the scanning electrode 11, and the liquid crystal layer therebetween.

  Further, on the opposite substrate 10 on the liquid crystal layer side, the first dummy scanning electrode 11 a is positioned outside the first scanning electrode 11 and the N + 1th corresponding position outside the Nth scanning electrode 11. Two dummy scanning electrodes 11b are provided. Further, on the liquid crystal layer side of the element side substrate 1, an electrode group of first dummy pixel electrodes (not shown) arranged opposite to the first dummy scanning electrode 11 a via the liquid crystal layer is provided. Yes. Each first dummy scanning electrode is connected to the signal line 2 via a thin film diode (not shown). Similarly, on the liquid crystal layer side of the element side substrate 1, an electrode group of second dummy pixel electrodes 5 b is provided so as to face the second dummy scanning electrode 11 b through the liquid crystal layer and are arranged along the same. Each second dummy pixel electrode 5b is also connected to the signal wiring 2 through a thin film diode (not shown). These first and second dummy pixel electrodes 5 b have the same configuration and dimensions as the regular pixel electrodes 5.

  An optical film 15 such as a polarizing plate is attached to the opposite side of the opposite substrate 10 from the liquid crystal layer side.

  A liquid crystal display device having such an electrode configuration is often applied to, for example, a mobile phone, and has an advantage that the horizontal dimension of the display device can be reduced. On the other hand, the routing from the scanning electrode 11 to the terminal tends to be dense, and there is hardly any space left for adding other target electrode wirings such as dummy electrodes (dummy scanning electrodes and dummy pixel electrodes). Further, it is necessary to densely arrange the opposite terminal electrode 12 and the element side terminal electrode 6 on one side of the liquid crystal cell 100, and it is difficult to provide a terminal electrode for other purposes such as for a dummy electrode in designing. Has the disadvantage of not having much freedom.

  However, according to the present embodiment, the first and second dummy scanning electrodes 11a, 11a, and 11c are not affected by the arrangement of the element-side terminal electrodes 6 and the opposing-side terminal electrodes 12 that are routed or taken out of the liquid crystal cell 100. 11b is provided. This is because the regular scan electrode 11 that is the connection destination of the first dummy scan electrode 11a and the regular scan electrode 11 that is the connection destination of the second dummy scan electrode 11b are the same as those in the first and second embodiments. This is because it can be selected relatively freely as described. For example, considering that the arrangement of dummy scanning electrodes according to the conventional configuration shown in FIGS. 19 and 20 cannot be applied to the liquid crystal cell 100 of this form, the advantages of this embodiment can be clearly understood. it can.

  In addition, the first and second dummy scanning electrodes 11a and 11b of the present embodiment are characterized in that they do not require dummy opposing terminal electrodes, and are fine on one side of the liquid crystal cell 100 as shown in FIG. Even if there are terminal electrodes arranged at a pitch, there is also an effect that the layout is not restricted at all. That is, the first and second dummy scanning electrodes 11a and 11b are provided without affecting the electrode design of the liquid crystal cell 100.

  Other functions and effects are the same as those of the first embodiment.

(Fifth embodiment)
FIG. 10 is a plan view of the liquid crystal cell 100 of the liquid crystal display device according to the fifth embodiment. FIG. 10 shows a state in which the opposing substrate 10 is disposed in front of the sheet and the element substrate 1 is disposed in the back of the sheet. FIG. 11 is a perspective view of the vicinity where the first dummy pixel electrode 5a is disposed. This embodiment is based on the knowledge (1) obtained by the inventors through experiments.

  Knowledge (1) means that one or one row of dummy electrodes (dummy scanning electrodes, dummy pixel electrodes) for the purpose of forming capacitive coupling is sufficient for each side of the region formed by the display pixel group. is there. This means that the dummy electrodes having other configurations can be arranged at any positions in a free configuration in a region around the display pixel group region where there is no dummy electrode for the purpose of forming capacitive coupling. ing.

  Generally, dummy electrodes typified by dummy scanning electrodes and dummy pixel electrodes are arranged for various purposes, but a plurality of dummy electrodes are arranged with the same material and the same dimensions (intervals) as the electrodes constituting the display pixel. There are many. In particular, in order to prevent defects due to static electricity during the manufacturing process, it is very effective to form a large number of dummy pixel electrodes with elements around the display pixel group region. However, if a large number of dummy pixel electrodes are carelessly arranged with the same dimensions as the display pixels, the outer shape of the liquid crystal cell 100 becomes large. This is because in the manufacture of the liquid crystal cell 100 in which a plurality of liquid crystal cells 100 are often formed simultaneously from the mother substrate, the number of liquid crystal cells 100 per mother substrate is reduced, which directly leads to an increase in manufacturing cost. Is extremely inconvenient.

  On the other hand, in order to arrange a large number of dummy pixel electrodes without increasing the outer shape of the liquid crystal cell 100, it is conceivable to make the outer dimension of the planar shape of the dummy pixel electrode smaller than that of the regular pixel electrode. However, since the circuit constant of the dummy pixel electrode is different from that of the regular pixel electrode, capacitive coupling becomes non-uniform when such a small dummy pixel electrode is adjacent to the regular pixel electrode. The problem that the display density of the display pixels at the outer peripheral position becomes non-uniform cannot be solved.

  Therefore, the present inventor divides the dummy electrodes arranged around the display pixel group region into at least two types, one of which is adjacent to the display pixel and at least the dummy constituting the display pixel and having the same external dimension as the planar shape. It has been conceived that another dummy electrode having an electrode having the other dimension different from that of the electrode constituting the display pixel is disposed as the other electrode. That is, a dummy electrode for the purpose of forming capacitive coupling is first arranged around the display pixel group region, and a dummy electrode having another purpose is further provided outside the dummy electrode.

  The liquid crystal cell 100 includes an element side substrate 1 and an opposite side substrate 10 provided so as to face each other, and a liquid crystal layer (dielectric material layer) provided so as to be sandwiched between both the substrates. Become.

  Pixel electrodes 5 are arranged in a matrix at predetermined intervals on the liquid crystal layer side of the element side substrate 1. Each pixel electrode 5 is connected to the signal wiring 2 through the thin film diode 4, and the signal wiring 2 is drawn out to the element side terminal electrode 6.

  N regular scanning electrodes 11 having a predetermined size are provided at an interval on the liquid crystal layer side of the opposing substrate 10, and each scanning electrode 11 is connected to the opposing terminal electrode 12.

  The element-side substrate 1 and the counter-side substrate 10 are each subjected to an alignment process, and then maintain a predetermined interval by using a spacer (not shown) through the sealing material 9 and also perform signal wiring. 2 and the direction in which the scanning electrode 11 extends are perpendicular to each other and the pixel electrode 5 and the scanning electrode 11 are bonded to each other, and a plurality of pixel electrodes 5 arranged in the direction in which the scanning electrode 11 extends are an electrode group. Is configured. A liquid crystal material is sealed in the gap between the two substrates, which constitutes a liquid crystal layer, and in the liquid crystal layer, liquid crystal molecules are in a predetermined alignment state. One display pixel is defined by the pixel electrode 5, the scanning electrode 11, and the liquid crystal layer therebetween.

  Further, on the liquid crystal layer side of the counter substrate 10, the first dummy scanning electrode 11 a and the (N + 1) th scanning electrode outside the Nth scanning electrode are positioned at the position corresponding to the 0th scanning electrode outside the first scanning electrode 11. The second dummy scanning electrode 11b is provided at the corresponding position with the same size and the same material as the regular scanning electrode 11, respectively. In the present embodiment, the first dummy scanning electrode 11a is connected to the second regular scanning electrode 11, and the second scanning electrode 11b is connected to the (N-1) th regular scanning electrode 11.

  On the liquid crystal layer side of the element side substrate 1, an electrode group of the first dummy pixel electrodes 5 a arranged opposite to the first dummy scanning electrode 11 a through the liquid crystal layer and arranged along the same is provided. Each first dummy pixel electrode 5a is connected to the signal line 2 through a thin film diode 4a. Similarly, on the liquid crystal layer side of the element side substrate 1, an electrode group of second dummy pixel electrodes 5 b is provided so as to face the second dummy scanning electrode 11 b through the liquid crystal layer and are arranged along the same. Each second dummy pixel electrode 5b is also connected to the signal wiring 2 through a thin film diode (not shown). These first and second dummy pixel electrodes 5 a and 5 b have the same configuration and dimensions as the regular pixel electrode 5.

  An optical film 15 such as a polarizing plate is attached to the opposite side of the opposite substrate 10 from the liquid crystal layer side. A light shielding film 17 is provided around the display pixel group region on the liquid crystal layer side of the counter substrate 10.

  In the liquid crystal cell 100 according to the present embodiment, the scan electrode side third and fourth dummy electrodes 11c having different configurations are provided in a region around the display pixel group region where the first and second dummy scan electrodes 11a and 11b are not present. 11d, and pixel electrode side third and fourth dummy electrodes 5c and 5d are provided.

  In other words, on the liquid crystal layer side of the counter substrate 10, the third scan electrode side third narrower than the first scan electrode 11 a, 11 b is arranged in parallel with the regular scan electrode 11. In addition, three fourth dummy electrodes 11c and 11d are provided. Further, the scan electrode side third and fourth dummy electrodes 11c and 11d are closely spaced with a shorter interval than the regular scan electrodes 11 (first and second dummy scan electrodes 11a and 11b). The scan electrode side third and fourth dummy electrodes 11c and 11d are not intended to cause capacitive coupling, and therefore there is no limitation on the electrical connection form. For example, it can be electrically floated or connected to another electrode. In the present embodiment, every third scan electrode side third and fourth dummy electrodes 11 c and 11 d are connected together to one regular scan electrode 11.

  On the liquid crystal layer side of the element-side substrate 1, outside the electrode group of the first and second dummy pixel electrodes 5a and 5b, they are flatter than the regular pixel electrode 5 and the first and second dummy pixel electrodes 5a and 5b, respectively. The electrode groups of the pixel electrode side third and fourth dummy electrodes 5c and 5d, each of which is composed of a dummy pixel electrode having a small outer dimension, correspond to the scanning electrode side third and fourth dummy electrodes 11c and 11d in three rows. It is provided one by one. The pixel electrode side third and fourth dummy electrodes 5c and 5d are connected to the signal line 2 through thin film diodes 4c and 4d (not shown), respectively. The pixel electrode side third and fourth dummy electrodes 5c and 5d are the same as the scanning electrode side third and fourth dummy electrodes 11c and 11d, respectively, and the regular pixel electrode 5 (first and second dummy pixel electrodes 5a). , 5b), the intervals are shorter and densely arranged. The thin film diodes 4 c and 4 d have the same configuration and dimensions as the regular thin film diode 4.

  According to this embodiment, the following effects can be obtained.

That is, first, the first and second dummy pixel electrodes 5a and 5b and the first and second dummy scanning electrodes having at least the same planar outer dimensions as those of the normal pixel electrode 11 are arranged. Capacitive coupling C _S can be generated in the display pixel located at the end, and as a result, the display density of the display pixel is the same as the display density of the other display pixels. Further, since the first and second dummy scanning electrodes 11a and 11b are connected to the regular scanning electrode 11, it is not necessary to prepare a counter terminal electrode for the dummy electrode.

  Next, the scan electrode side third and fourth dummy electrodes 11c and 11d are provided on the outer sides of the first and second dummy scan electrodes 11a and 11b, respectively, and the first and second dummy pixel electrodes. Since the pixel electrode side third and fourth dummy electrodes 5c and 5d having the thin film diode 4c are provided outside the 5a and 5b, the thin film diode 4c can be used even if static electricity is generated during the manufacturing process of the liquid crystal cell 100. , 4d (not shown) can be prevented from becoming defective if the thin film diode 4 of the display pixel in the display pixel group region is not destroyed first.

  Since the third and fourth dummy electrodes 5c and 5d on the pixel electrode side are smaller in outer dimension than the regular pixel electrode 5, the outer shape of the liquid crystal cell 100 does not increase even if a plurality of pixel electrodes are provided. Therefore, even if a large number of third and fourth dummy electrodes 5c and 5d on the pixel electrode side are provided, the outer shape of the liquid crystal cell 100 is hardly changed, so that the number of liquid crystal cells 100 that can be taken from the mother substrate is not reduced. There is.

  The pixel electrode side third and fourth dummy electrodes 5c and 5d and the scan electrode side third and fourth dummy electrodes 11c and 11d are not necessarily limited to three, respectively. It is effective to form the pixel electrode side third and fourth dummy electrodes 5c and 5d having at least switching elements such as thin film diodes in a larger number of arrangements. The scan electrode side third and fourth dummy electrodes 11c and 11d may be the counter electrodes of the pixel electrode side third and fourth dummy electrodes 5c and 5d, respectively, and the same number of scan electrode side first electrodes as the number of rows thereof. It is not necessary to provide the third and fourth dummy electrodes 11c and 11d. For example, one large solid electrode may be used, and the third and fourth dummy electrodes 11c and 11d on the scanning electrode side are opposed to the third and fourth dummy electrodes 5c and 5d on the plurality of rows. It does not matter even if it is a form to do. However, increasing the number of dummy electrodes arranged outside the dummy electrodes for the purpose of forming capacitive coupling adjacent to the display pixel group region can increase display uniformity and prevent static electricity. It is effective to exert the maximum effect on both. In other words, the display pixel group is generally a rectangular region, but one dummy electrode for capacitive coupling is disposed adjacent to at least one side around this region, and a plurality of dummy electrodes are further provided in the outer region. The form in which the dummy electrode is arranged is good, and this form has a configuration in which the outer shape of the liquid crystal cell 100 does not become the largest.

  The first and second dummy scanning electrodes 11a and 11b are connected to the regular scanning electrode 11, but the first and second dummy scanning electrodes 11a and 11b are, for example, conventional liquid crystal cells. 19 and FIG. 20, even if the structure is independent of the regular scanning electrode 11, the appropriate arrangement structure of the two types of dummy electrodes, which is the gist of the invention of this embodiment, enables display by capacitive coupling. Needless to say, the effect of eliminating the non-uniformity and effective countermeasures against static electricity can be obtained.

The third and fourth dummy electrodes include pixel electrode side third and fourth dummy electrodes 5c and 5d provided with thin film diodes 4c and 4d (not shown), and scan electrode side third and fourth dummy electrodes 11c. 11d, but is not limited thereto. For example, the electrodes shown in (1) to (5) below may be provided on at least one of the element side substrate 1 and the counter side substrate 10 as third and fourth dummy electrodes.
(1) Third and fourth dummy electrodes for the purpose of controlling the thickness of the liquid crystal layer. For example, it is arranged around the display pixel group region using an electrode material constituting the display pixel. The shape and number may be determined by those skilled in the art, but they are formed with a pattern and density similar to wiring and pixel electrodes.
(2) When the spacers interposed between the substrates in order to maintain the gap between the element-side substrate 1 and the counter-side substrate 10 are spread on the substrate during the manufacturing process of the liquid crystal cell 100, the charged state of the substrate surface is changed. Third and fourth dummy electrodes intended to be controlled. For example, a third dummy electrode whose surface is made of the same material as the pixel electrode is formed in an arbitrary shape and number around the display pixel group region.
(3) Third and fourth dummy electrodes intended to adsorb impurities in the liquid crystal layer. For example, it is an electrode to which an electric potential is applied from the outside, and is provided in the vicinity of an opening provided in a part of the sealing material 9 for injecting liquid crystal or around the display pixel group region.
(4) Third and fourth dummy electrodes for the purpose of color adjustment outside the display pixel group region of the liquid crystal cell 100. For example, a pattern for adjusting the transmittance and the reflectance is provided around the display pixel group region using the same material as the electrodes constituting the display pixel.
(5) Third and fourth dummy electrodes of redundant wiring for repairing normal wiring and electrode disconnection. For example, an electrode that is arranged in parallel to a regular wiring or electrode or is a detour path.

  The above-described third and fourth dummy electrodes are free in configuration, material, and dimensions. This is because the first and second dummy electrodes are provided between the third and fourth dummy electrodes and the display pixel group region for the purpose of forming capacitive coupling having the same outer dimensions of the planar shape as the electrodes constituting the display pixels. This is because the third and fourth dummy electrodes are not limited from the viewpoint of capacitive coupling, that is, from the viewpoint of an equivalent circuit. Therefore, even if the third and fourth dummy electrodes are arranged from the region immediately adjacent to the first and second dummy electrodes for the purpose of forming capacitive coupling, the display pixels are displayed uniformly, and the third and fourth dummy electrodes are displayed. It has the advantage that it can have the functions expected by those skilled in the art.

  Since various first to fourth dummy electrodes are provided around the display pixel group region, these dummy electrodes may be displayed. However, since the light shielding film 17 is provided around the display pixel group region, it is possible to avoid giving the user of the display device an unpleasant aesthetic appearance. The light shielding film 17 can be provided not only on the opposite substrate 10 but also on the inside of the element side substrate 1 or on the outer surface of the liquid crystal cell 100.

  Further, a further dummy electrode may be formed outside the third and fourth dummy electrodes toward the outer edge of the liquid crystal cell 100.

  Other functions and effects are the same as those of the first embodiment.

(Other embodiments)
Although the embodiments have been described above by taking the liquid crystal display device having a thin film diode as an example, the application range is not limited thereto. In the first to fifth embodiments, a display device using a liquid crystal material as a dielectric material is used. However, instead of a liquid crystal material, another dielectric material such as an inorganic light emitting material or an organic light emitting material is sandwiched between electrodes. may be a device, short and a scanning electrode and the pixel electrode is a dielectric material is sandwiched between these electrodes, it is possible to apply to any display device that parasitic capacitance is generated in the adjacent electrodes .

  The present invention is useful for display devices.

It is a top view of the liquid crystal cell of the liquid crystal display device which concerns on 1st Embodiment. It is the perspective view which expanded some liquid crystal cells of the liquid crystal display device concerning a 1st embodiment. It is a wave form diagram for demonstrating the scanning signal applied to the scanning electrode of the liquid crystal cell of the liquid crystal display device which concerns on 1st Embodiment. It is a perspective view which shows the modification of the liquid crystal cell of the liquid crystal display device which concerns on 1st Embodiment. It is a top view of the liquid crystal cell of the liquid crystal display device which concerns on 2nd Embodiment. It is a wave form diagram for demonstrating the scanning signal applied to the scanning electrode of the liquid crystal cell of the liquid crystal display device which concerns on 2nd Embodiment. It is a top view of another modification of the liquid crystal cell of the liquid crystal display device concerning a 1st embodiment. It is a top view of the liquid crystal cell of the liquid crystal display device which concerns on 3rd Embodiment. It is a top view of the liquid crystal cell of the liquid crystal display device which concerns on 4th Embodiment. It is a top view of the liquid crystal cell of the liquid crystal display device which concerns on 5th Embodiment. It is the perspective view which expanded a part of liquid crystal cell of the liquid crystal display device which concerns on 5th Embodiment. It is an explanatory diagram for explaining an experimental outline. It is the perspective view which expanded a part of liquid crystal cell of the conventional liquid crystal display device. It is a perspective view of the conventional liquid crystal display device. It is a top view of the liquid crystal cell of the conventional liquid crystal display device. It is the perspective view which expanded a part of board | substrate which comprises the liquid crystal cell of the conventional liquid crystal display device. It is a figure for demonstrating the drive waveform of the conventional liquid crystal display device. It is a figure for demonstrating the other drive waveform of the conventional liquid crystal display crushing. It is a top view of the liquid crystal cell of the liquid crystal display device which has the structure for eliminating the conventional display nonuniformity. It is a top view of the liquid crystal cell of the liquid crystal display device which has another structure for eliminating the conventional display nonuniformity.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Element side board | substrate 2 Signal wiring 2a Lower electrode 3 Upper electrode 4, 4a, 4c Thin film diode 5 Pixel electrode 5a 1st dummy pixel electrode 5b 2nd dummy pixel electrode 5c Pixel electrode side 3rd dummy electrode 5d Pixel electrode side 4th dummy Electrode 6 Element side terminal electrode 7 Data signal circuit board 8 Data signal driving IC chip 9 Sealing material 10 Opposite side substrate 11 Scan electrode 11a First dummy scan electrode 11b Second dummy scan electrode 11c Scan electrode side third dummy electrode 11d Scan Electrode side fourth dummy electrode 12 Opposing terminal electrodes 12a, 12b Dummy opposing terminal electrode 13 Scanning signal circuit board 14 Scanning signal driving IC chip 15 Optical film 16 Base film 17 Light shielding films 18a, 18b Electrodes 19a-19d Conductive material 20a ~ 20d Extraction electrode 100 Liquid crystal cell

Claims (27)

N regular scanning electrodes provided in order from number 1 to number N so as to extend in parallel to each other, and an electrode group facing each of the N scanning electrodes and arranged along the scanning electrodes A plurality of regular pixel electrodes formed and arranged in a matrix, and a dielectric material layer provided between the scan electrodes and the pixel electrodes,
A first dummy scan electrode provided adjacent to the outside of the first scan electrode of the N scan electrodes and extending in parallel with the first scan electrode;
In the first dummy scan electrode, when the scan signal is applied to the first scan electrode and selected, the voltage of the first dummy scan electrode is changed from the second of the N scan electrodes to N. When the scanning signal is applied to any one of the scanning electrodes and the selected scanning electrode is selected, the N scanning electrodes are equal to the voltage of the scanning electrode with the smaller number adjacent to the scanning electrode in the selected state. A display device connected to any one of the scanning electrodes. N regular scanning electrodes provided in order from number 1 to number N so as to extend in parallel to each other, and an electrode group facing each of the N scanning electrodes and arranged along the scanning electrodes A plurality of regular pixel electrodes formed and arranged in a matrix, and a dielectric material layer provided between the scan electrodes and the pixel electrodes,
A first dummy scan electrode provided adjacent to the outside of the first scan electrode of the N scan electrodes and extending in parallel with the first scan electrode;
The N scan electrodes are configured such that scan signals are sequentially applied in a time division manner,
In the first dummy scan electrode, when the scan signal is applied to the first scan electrode and selected, the voltage of the first dummy scan electrode is changed from the second of the N scan electrodes to N. When the scanning signal is applied to any one of the scanning electrodes and the selected scanning electrode is selected, the N scanning electrodes are equal to the voltage of the scanning electrode with the smaller number adjacent to the scanning electrode in the selected state. A display device connected to any one of the scanning electrodes other than the first scanning electrode. N regular scanning electrodes provided in order from number 1 to even number N so as to extend in parallel with each other, and the N scanning electrodes that face each other and are arranged along the scanning electrodes A plurality of regular pixel electrodes arranged in a matrix to form an electrode group, and a dielectric material layer provided between the scan electrodes and the pixel electrodes,
A first dummy scan electrode provided adjacent to the outside of the first scan electrode of the N scan electrodes and extending in parallel with the first scan electrode;
The N scan electrodes are configured such that the scan signals are sequentially applied in a time division method and in a line inversion drive method in which the polarity of the scan signal is alternately inverted for each scan electrode.
The display device according to claim 1, wherein the first dummy scan electrode is connected to any odd-numbered scan electrode other than the first of the N scan electrodes. The display device according to any one of claims 1 to 3,
An electrode group of a first dummy pixel electrode that is adjacent to the outside of the electrode group of the pixel electrode in the first row provided facing the first scan electrode and is opposed to the first dummy scan electrode is further provided. A display device comprising: The display device according to claim 4,
The distance between the electrode group of the first dummy pixel electrode and the electrode group of the pixel electrode in the first row adjacent to the electrode group is greater than the distance between the first dummy scan electrode and the first scan electrode adjacent thereto. A display device characterized by being shorter than a distance. The display device according to claim 4,
A display device, wherein a distance between the electrode group of the first dummy pixel electrode and the electrode group of the pixel electrode in the first row adjacent thereto is equal to the distance between the electrode groups of the pixel electrode. The display device according to claim 4,
The display device according to claim 1, wherein the first dummy pixel electrode and the plurality of pixel electrodes are both formed to have the same planar outer dimensions. The display device according to any one of claims 1 to 3,
A display device, further comprising a scan electrode side third dummy electrode provided outside the first dummy scan electrode. The display device according to claim 4,
The display device further comprising a pixel electrode side third dummy electrode provided outside the electrode row of the first dummy pixel electrode. The display device according to claim 9,
3. The display device according to claim 1, wherein the third dummy electrode on the pixel electrode side is composed of an electrode array of dummy pixel electrodes arranged in parallel with the electrode array of the first dummy pixel electrode. The display device according to claim 10,
A display device comprising a plurality of rows of electrode groups of the pixel electrode side third dummy electrodes. The display device according to claim 11,
The display device, wherein an arrangement pitch of the electrode groups of the third dummy electrode on the pixel electrode side is shorter than an arrangement pitch of the pixel electrodes. The display device according to claim 1,
A second dummy scan electrode provided adjacent to the outside of the Nth scan electrode and extending in parallel with the Nth scan electrode;
In the second dummy scan electrode, when the scanning signal is applied to the Nth scan electrode and selected, the voltage of the second dummy scan electrode is changed from the first of the N scan electrodes to N. When the scanning signal is applied to any one of the first scanning electrodes to be in the selected state, the voltage is equal to the voltage of the larger scanning electrode adjacent to the selected scanning electrode. A display device connected to any one of N scanning electrodes. The display device according to claim 2,
A second dummy scan electrode provided adjacent to the outside of the Nth scan electrode and extending in parallel with the Nth scan electrode;
In the second dummy scan electrode, when the scanning signal is applied to the Nth scan electrode and selected, the voltage of the second dummy scan electrode is changed from the first of the N scan electrodes to N. When the scanning signal is applied to any one of the first scanning electrodes to be in the selected state, the voltage is equal to the voltage of the larger scanning electrode adjacent to the selected scanning electrode. A display device connected to any one of the N scanning electrodes other than the Nth scanning electrode. The display device according to claim 3,
A second dummy scan electrode provided adjacent to the outside of the Nth scan electrode and extending in parallel with the Nth scan electrode;
The display device, wherein the second dummy scan electrode is connected to any even-numbered scan electrode other than the Nth scan electrode among the N scan electrodes. N regular scanning electrodes provided in order from number 1 to number N so as to extend in parallel to each other, and an electrode group facing each of the N scanning electrodes and arranged along the scanning electrodes A plurality of regular pixel electrodes formed and arranged in a matrix, and a dielectric material layer provided between the scan electrodes and the pixel electrodes,
A second dummy scan electrode provided adjacent to the outside of the Nth scan electrode of the N scan electrodes and extending in parallel with the Nth scan electrode;
In the second dummy scan electrode, when the scanning signal is applied to the Nth scan electrode and selected, the voltage of the second dummy scan electrode is changed from the first of the N scan electrodes to N. When the scanning signal is applied to any one of the first scanning electrodes to be in the selected state, the voltage is equal to the voltage of the larger scanning electrode adjacent to the selected scanning electrode. A display device connected to any one of N scanning electrodes. N regular scanning electrodes provided in order from number 1 to number N so as to extend in parallel to each other, and an electrode group facing each of the N scanning electrodes and arranged along the scanning electrodes A plurality of regular pixel electrodes formed and arranged in a matrix, and a dielectric material layer provided between the scan electrodes and the pixel electrodes,
A second dummy scan electrode provided adjacent to the outside of the Nth scan electrode of the N scan electrodes and extending in parallel with the Nth scan electrode;
In the second dummy scan electrode, when the scanning signal is applied to the Nth scan electrode and selected, the voltage of the second dummy scan electrode is changed from the first of the N scan electrodes to N. When the scanning signal is applied to any one of the first scanning electrodes to be in the selected state, the voltage is equal to the voltage of the larger scanning electrode adjacent to the selected scanning electrode. A display device connected to any one of the N scanning electrodes other than the Nth scanning electrode. N regular scanning electrodes provided in order from number 1 to even number N so as to extend in parallel with each other, and the N scanning electrodes that face each other and are arranged along the scanning electrodes A plurality of regular pixel electrodes arranged in a matrix to form an electrode group, and a dielectric material layer provided between the scan electrodes and the pixel electrodes,
A second dummy scan electrode provided adjacent to the outside of the Nth scan electrode of the N scan electrodes and extending in parallel with the Nth scan electrode;
The display device, wherein the second dummy scan electrode is connected to any even-numbered scan electrode other than the Nth scan electrode among the N scan electrodes. The display device according to any one of claims 13 to 18,
An electrode group of a second dummy pixel electrode that is adjacent to the outside of the electrode group of the pixel electrode in the Nth row provided to face the Nth scan electrode and that faces the second dummy scan electrode is further provided. A display device comprising: The display device according to claim 19,
The distance between the electrode group of the second dummy pixel electrode and the electrode group of the pixel electrode of the Nth row adjacent to the electrode group of the second dummy pixel electrode is the distance between the second dummy scan electrode and the Nth scan electrode adjacent thereto. A display device characterized by being shorter than a distance. The display device according to claim 19,
A display device, wherein a distance between the electrode group of the second dummy pixel electrode and an electrode group of the pixel electrode of the Nth row adjacent thereto is equal to the distance between the pixel electrodes. The display device according to claim 19,
The display device, wherein the second dummy pixel electrode and the plurality of pixel electrodes are both formed to have the same planar outer dimensions. The display device according to any one of claims 13 to 18,
The display device further comprising a scan electrode side fourth dummy electrode provided outside the second dummy scan electrode. The display device according to claim 19,
The display device further comprising a pixel electrode side fourth dummy electrode provided outside the electrode row of the second dummy pixel electrode. The display device according to claim 24,
4. The display device according to claim 1, wherein the pixel electrode side fourth dummy electrode is composed of an electrode array of dummy pixel electrodes arranged in parallel with the electrode array of the second dummy pixel electrode. The display device according to claim 25,
A display device comprising a plurality of rows of electrode groups of the pixel electrode side fourth dummy electrodes. The display device according to claim 26, wherein
A display device, wherein an arrangement pitch of the electrode groups of the pixel electrode side fourth dummy electrodes is shorter than an arrangement pitch of the pixel electrodes.