TWI375210B - - Google Patents

Description

1375210

[Technical Field] The present invention relates to an active matrix type liquid crystal display element, and a liquid crystal display device and a liquid crystal display element driving method using the liquid crystal display element for image display. [Prior Art] # In recent years, a wide range of liquid crystal display devices using liquid crystals as display elements have been used. The liquid crystal display device is, for example, a so-called direct-view device in which a liquid crystal driving circuit is formed on a large glass substrate, and a light source such as a backlight, a polarizing plate, and a color filter are combined, or on a micro substrate. A so-called projection type (projection type) device in which a pixel is combined with an optical series and expanded projection is provided, and various forms of high-definition images can be provided, and commercialization is achieved. In addition, regarding the driving mode of the liquid crystal used in these devices, various devices have been developed which are used in the following manners, such as a vertical alignment mode, a horizontal alignment mode, a ferroelectric liquid crystal, and an OCB (Optically Compensated Bend). Ways, etc. In this liquid crystal display device, a voltage is applied to the vertical direction of the substrate by the pixels constituting the display region, thereby driving the liquid crystal display element. The extreme difference in driving voltage difference between a certain pixel and the adjacent pixel is caused by a lateral electric field between the pixels, which may cause disorder of liquid crystal alignment. The misalignment of the liquid crystal due to the voltage difference between adjacent pixels is called a disclination. When this alignment failure occurs, accurate image display cannot be performed based on the image of the pixel -4- 1375210 4 . That is, for example, deterioration of brightness or deterioration of contrast, deterioration of fine image patterns, and the like may occur, and for example, color reproduction using three primary colors may cause chromatic aberration or the like due to change in brightness of the I color. This problem is not limited to the type of liquid crystal or the driving method, but is generated in almost all liquid crystal display devices, and this phenomenon is particularly remarkable in a projection type liquid crystal display device because of the high expansion ratio. . Therefore, in the conventional projection type liquid crystal display device, the following method is often employed, that is, for example, a portion where a disclination is generated by a dim mask, and a microlens array is disposed in the opening portion to perform an enlarged projection, thereby suppressing A technique such as a wrong image. However, this technique has disadvantages such as a decrease in light use efficiency, and therefore requires further improvement. For this reason, for example, in the non-patent document 1, it is proposed to optimize the alignment direction of the liquid crystal, the alignment control force, and the generation of the disclination in the reflection type microdisplay. Further, for example, in Patent Document 1, a method of controlling the alignment orientation of a plurality of liquid crystal display elements is proposed. [Non-Patent Document 1] D. Cuypers, two others, "Fringe-field induced disclinations in VAN LCos panels", ID W, 04 Proceedings of The 11th International Display Workshops, Society for information Display, December 8, 2004, [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. The method used to implement such parameters is not specifically shown, and thus is actually difficult to implement. On the other hand, according to the technique of Patent Document 1, it is possible to reduce the chromatic aberration caused by the misalignment (dislocation) of the liquid crystal to some extent. However, it is still insufficient from the viewpoint of lowering this phenomenon in response to the driving condition of adjacent pixels which change at any time. The present invention has been made in view of the above problems, and an object of the invention is to provide an image display element and an image capable of reducing image alignment failure of a liquid crystal regardless of the content of a displayed image. A display device and a method of driving an image display element. (Means for Solving the Problem) The liquid crystal display device of the present invention includes: a liquid crystal display panel including a plurality of pixels for performing image display; and an applied voltage for one pixel and the adjacent pixel A driving means for driving the display of the liquid crystal display panel while sequentially correcting the pixel data of each pixel so that the voltage ratio between the applied voltages becomes smaller. In this case, the driving means may be configured to sequentially correct the pixel data by using the time integral of the reflectance of the pixel in the specific plurality of frame periods as the determination index. Here, "majority of frame periods" refers to a period of a plurality of image frames or a period of a plurality of image fields. The liquid crystal display device of the present invention is a liquid crystal display device including the above liquid crystal display element, -6 - 1375210 V * i and using light modulated by the liquid crystal display element for image display. In the liquid crystal projector, the liquid crystal display device includes a light source: and a projection means for projecting light modulated by the light source and modulated by the liquid crystal display element onto the screen. In the device, the pixel data of each pixel is sequentially corrected so that the voltage ratio between the applied voltage to one pixel and the applied voltage to the adjacent pixel is made smaller. The display driving of the liquid crystal display panel is performed based on the corrected pixel data. The driving method of the liquid crystal display device of the present invention is a method for driving a liquid crystal display element including a liquid crystal display panel including a plurality of pixels for image display, and compares pixel data of one pixel with pixel data of the adjacent pixel. From the comparison result, when it is judged that the voltage ratio between the applied voltage of one pixel and the applied voltage to the adjacent pixel is larger than the specific threshold ', the method is such that the voltage ratio becomes smaller than the threshold '. The pixel data of each pixel is sequentially corrected, and then the display is driven based on the corrected pixel data. In the driving method of the liquid crystal display device of the present invention, the pixel data of one pixel and the pixel data of the adjacent pixel are compared, and a voltage ratio between an applied voltage of one pixel and an applied voltage to an adjacent pixel is determined. When it is larger than a specific threshold ', the pixel data of each pixel is sequentially corrected in such a manner that the voltage ratio becomes smaller than the threshold 値. Then, display driving is performed based on the corrected pixel data. 1375210 4. Effects of the Invention: The liquid crystal display device, the liquid crystal display device, and the driving method of the liquid crystal display device according to the present invention are configured such that between an applied voltage of a pixel and an applied voltage to the adjacent pixel The pixel data of each pixel is sequentially corrected in such a manner that the voltage ratio becomes smaller, and the display driving of the liquid crystal display panel is performed based on the corrected pixel data, so that the applied voltage ratio between the adjacent pixels can be sequentially reduced. Defective alignment (DiSClinati〇n: disclination) occurs, and deterioration of image reproducibility is suppressed. Therefore, regardless of the content of the displayed image, it is possible to achieve a good image quality display. [Embodiment] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [First Embodiment] <Configuration of Liquid Crystal Display Element> Fig. 1 shows a configuration of a liquid crystal display element according to a first embodiment of the present invention. The liquid crystal display element includes a pixel signal correcting unit 5 that specifically corrects an input image signal Din from the outside, and an image signal (output image signal Dout) corrected by the pixel signal correcting unit 5; The liquid crystal display unit 1 is displayed as a reflective liquid crystal display element as will be described later. The liquid crystal display unit 1 includes a display area 10 in which a plurality of pixels are arranged in a matrix, and a driver for image display.

1375210 V material driver] 2 and scan driver] 3. A pixel driving circuit 14 is formed in each of the pixels 11, and the data driver 12 and the scan driver 13 are disposed around the display area 10. The data driver 12 is input with the signal from the pixel signal correcting unit 5 via the signal line 15. The image signal D out is output. The pixel driving circuit 14 is formed in a lower layer of each of the reflective pixel electrodes 42 to be described later, and is generally constituted by a switching capacitor T1 and a storage capacitor C1 for supplying a voltage to the liquid crystal 2. In the pixel drive circuit 14, a plurality of data lines 1 2 A ' are arranged in the column direction, and a plurality of scanning lines are arranged in the row direction! 3 a. The intersection of each of the data lines 12A and the respective scanning lines 13A corresponds to one pixel. The source electrode of each switching transistor T1 is connected to the data line 〖2A, and the gate electrode is connected to the scanning line 13 A. The drain electrode of each switching transistor T 1 is connected to each of the reflective pixel electrode 42 and the auxiliary capacitor C1. Each of the data lines 12A is connected to the data drive 12, and an image signal is supplied from the data drive 12. Each of the scanning lines 1 3 A is connected to the scan driver 13 , and scan signals are sequentially supplied from the scan driver 13 . Fig. 2 shows a cross-sectional configuration of the liquid crystal display unit 1. The liquid crystal display unit 1 includes a counter substrate 30 and a pixel electrode substrate 40 that are opposed to each other, and a vertical alignment liquid crystal 2 injected between the substrates. The counter substrate 30 includes a glass substrate 31 and a transparent electrode 32 laminated on the glass substrate 31. On the side of the transparent electrode 32 that is in contact with the vertical alignment liquid crystal 2, the alignment film 33 is further laminated. Transparent -9- 1375210 The electrode 32 is an electrode material having a light transmitting effect, and generally ITO (Indium Tin Oxide) which is a solid solution of tin oxide (Sn02) and indium oxide (?n203) is used. On the transparent electrode 32, a potential common to the entire pixel region (for example, a ground potential) is applied. The pixel electrode substrate 40 is formed by, for example, forming a reflective pixel electrode 42 in a matrix on the single crystal germanium substrate 41. On the germanium substrate 41, a CMOS (Complementary Metal Oxide Semiconductor) or an NMOS (Negative Metal Oxide Semiconductor) is formed by switching between an transistor ΤΙ and a capacitor (auxiliary capacitor) Cl. Type drive circuit. On the side of the pixel electrode substrate 40 that is in contact with the vertical alignment liquid crystal 2, the alignment film 43 is further laminated. The reflective pixel electrode 42 is composed of a metal film represented by aluminum (A1) or silver (Ag). When an aluminum electrode or the like is used as the reflective pixel electrode 42, both the function of the light reflecting film and the function of applying a voltage to the electrode of the liquid crystal are obtained. Further, in order to increase the reflectance, a reflective layer composed of a multilayer film such as a dielectric mirror may be formed on the aluminum electrode. In the vertical alignment liquid crystal 2 used in the reflective liquid crystal display device, when the applied voltage is zero, the long axis of the molecule is aligned in a direction substantially perpendicular to each substrate surface, and when a voltage is applied, it is tilted inward. The tilt state is tilted. If the tilt direction of the liquid crystal molecules is not constant during driving, light and dark ripples will be generated. In order to avoid this phenomenon, it is necessary to give a slight pretilt angle in a certain direction (generally the diagonal direction of the device) to produce -10- 1375210 <; Vertical alignment. If the pretilt angle is too large, the vertical alignment property is deteriorated, and the increase in the 黒 step causes the contrast to be lowered. Therefore, generally, the pretilt angle is controlled to be between 1 ° and 7 °. As the alignment films 33 and 43, for example, an oblique vapor deposition film of a hafnium oxide film represented by cerium oxide (SiO 2 ) can be used. At this time, the pretilt angle of the vertical alignment liquid crystal 2 can be controlled by changing the vapor deposition angle at the time of oblique vapor deposition. Further, as the alignment films 33 and 43, a film which is subjected to a rubbing (alignment) treatment with a polyiminamide-based organic compound may be used. At this time, the pretilt angle can be controlled by changing the brushing conditions. Here, the misalignment (dislocation) generated in the conventional liquid crystal display element will be described with reference to Figs. 3 and 4 . Figs. 3 and 4 show the generation pattern of the alignment failure, (A) shows the relationship between the position in the liquid crystal display unit and the reflection intensity of light, and (B) shows the position in the liquid crystal display unit and the vertical alignment liquid crystal 102. The relationship between the orientation directions. The figure numbers R10 and R20 in the figure indicate ideal reflection intensity characteristics, and the figure numbers ri 1 and R21 represent actual reflection intensity characteristics. In addition, the arrows P1 and P4 in the figure indicate the pretilt direction of the vertical alignment liquid crystal 102 (the oblique direction of the vertical alignment liquid crystal molecules when a voltage is applied to each pixel, which is determined by the pretilt direction) 'Fig. 142W, 142W1, 14 2W2 schematically represent pixels to which a white-order voltage is applied, that is, pixels displayed by brightness higher than the first specific gray scale (white display pixels), and pattern numbers M2B, I42B1, and 142B2 are pattern-applied. The pixel of the black-order voltage, that is, the pixel (black display pixel) displayed at a lower luminance than the first specific gray scale and lower than the second specific gray scale. It can be seen from Fig. 3 (B) and Fig. 4 (B) that the vicinity of the boundary between the white display pixel -11 - 1375210 142W and the black display pixel 142B1 and the boundary between the white 142 WI and the black display pixel 142B are known. Due to the voltage difference between the applied voltage of the white level and the applied voltage of the black level, a transverse electric field is generated between the pixels, and as shown by the figure P2, the alignment of the liquid crystal 102 is disturbed. That is, in the pixels 142W1, 142W, the original liquid crystal should be aligned to the horizontal side due to the transverse electric field generated between the pixels, and the vertical direction is aligned. Since the alignment of the liquid crystal 2 is poor, the figure P 3 in the figure, As shown in the figure, the reflection intensity of the light locally is generated in the portion, and black streaks are also generated on the liquid crystal display portion. In addition to this, the reduction in brightness or the deterioration of contrast, and the destruction of fine image patterns, such as the use of the three primary colors for color reproduction, may result in chromatic aberration due to the change of one color. In addition, as can be seen from Fig. 3 (B) and Fig. 4 (B), this good 'in the pretilt direction P 1 , P 4 along the vertical alignment liquid crystal 1 0 2 indicates that the pixel is toward the black display pixel. The adjacent pixels of the sequence are born to each other at the position of the white display pixel. Therefore, in order to more efficiently perform the pixel signal correction by the pixel signal correcting unit 5 as described above, it is preferable that the details of the adjacent pixels are selectively (preferred) to be described in detail later (Fig. 8). . Returning to the description of Fig. 1, the pixel signal correcting unit 5 performs a specific successive correction for the external input image signal Din. Fig. 5 is a diagram showing the functional block configuration of the image signal correcting unit 5. The image correcting unit 5 includes a gamma correcting unit 5 1 and a memory image display adjacent to each other, and P5 is displayed in the direction of the image. Since P6 is reduced, for example, etc., the brightness alignment of the example is not white, and the system is successively performed after the production. From Cheng. This β 52 ; -12 - 1375210 comparison unit 53; correction amount determining unit 54; and misalignment correcting unit 55. The gamma correction unit 51 performs specific gamma correction on the input image signal Din from the outside. The so-called gamma correction refers to a correction of each pixel corresponding to a so-called VT curve (driving voltage-light output curve) which differs depending on the thickness of the liquid crystal layer of each element or the wavelength of the output light. . The image data (pixel data) of each pixel subjected to gamma correction by the gamma correction unit 51 is stored as the number of pixels required in the comparison unit 53, that is, as follows The portion of the number of pixels required for comparison of the pixel data of the adjacent pixels is composed of, for example, an SRAM (Static Random Access Memory). The comparing unit 53 refers to the pixel data stored in the memory unit 52 to compare the pixel data of each pixel with the pixel data of the adjacent pixels. Specifically, the potential difference between the applied voltage (driving voltage) for one pixel and the applied voltage to the adjacent pixel is compared. The correction amount determining unit 54 determines whether the voltage ratio between the applied voltage to one pixel and the applied voltage to the adjacent pixel is larger than a specific threshold 因, and determines the voltage, based on the comparison result of the comparing unit 53. When the comparison specific threshold is still large, the correction amount of the pixel data of each pixel is determined using a specific correction table so that the voltage ratio becomes smaller. Fig. 6 is a view showing an example of a correction table 7 for specifying correction amounts of pixels 11A and 11B adjacent to each other as an example of a correction table, and Fig. 6(A) shows pixels of pixels H and HB before correction. Information VinA, -13- 1375210

The relationship between the VinB and the pixel data VoutA and VoutB of the corrected pixels 1 1 A and 1 1B. Further, Fig. 6(B) shows a correction table 71 for specifying the relationship between VinB and VoutA and VoutB at VinA = 40 in this correction table 7. In these figures, the number of VinA' VinB, VoutA, and VoutB is "0" to "100", which indicates the magnitude of the applied voltage (drive voltage) to the pixels 11A and 11B, respectively, and is "black". The order display, the percentage when "100" is displayed as white level. Further, the figure numbers A1 and B1 in Fig. 6(B) indicate the characteristics of VinA and VinB, respectively, and the figure numbers A2 and B2 indicate the characteristics of VoutA and VoutB, respectively. In the correction tables 7 and 71 of the sixth figure (A)'Fig. 6(B), for example, from the comparison result of the comparison unit 53, the pixel data V in A = 40 and the pixel 1 of the pixel na are known. When the pixel data VinB of 1 B is =0, the correction amount determining unit 54' successively determines the pixel data V〇utA=60 of the corrected pixel 丨a and the pixel data VoutB=6 of the pixel 1 1 B. Correction amount of pixel data VinA, VinB. Further, the data range w1 shown in Fig. 6(B) is a threshold 规定 for determining whether or not to perform pixel correction successively. That is, in the correction table 71, for example, the ratio of the pixel data to the larger of the pixel data Ia, 1 1 B is greater than 2 times, specifically, relative to VinA = 40. When VinB = 20 or less or VinB = 8〇 or more (outside of the data range W 1), the pixel data is sequentially corrected. More specifically, for example, as shown in Fig. 7(A), when VinA = 40 and VinB = 〇〇 ', the correction amount determining unit 54 is represented by a correction table such as the -14 - 752510 4 (Fig. And the arrows P72 and p7 in Fig. 7(A) are respectively displayed, and the correction of the pixel data V jn A, V i η B is sequentially determined so that Vo ut A = 4 5 and Vo utB = 90. the amount. That is, 'the correction amount is determined such that the ratio of the pixel data is changed from VinB/VinA=l〇〇/40 to a smaller v〇utB/V〇utA=90/45. Further, for example, FIG. 7 ( As shown in B), when VinA = 40 and VinB, the correction amount determining unit 54 is displayed by the correction table 71 as shown by arrows P73 and P74 in Figs. 6(B) and 7(B), respectively. The amount of correction of the pixel data Vin A, Vi nB is successively determined so that VoutA = 60 and VoutB = 5. That is, the correction amount is determined in such a manner that the ratio of the pixel data is changed from VinB/VinA = 40/0 to a smaller v〇utB/VoutA = 60/5. In addition, when the pixel data of such a side is black level (or near the black level), it is preferable to preferentially increase the pixel data of the order, that is, increase the applied voltage of the black display pixel. As a result, even if the pixel data does not change significantly, the effect of reducing the pixel data can be greatly improved (in this case, it is reduced from infinity (~) to 15). Further, as shown in Fig. 8, when VinA = 40 and VinB = 0, the correction amount determining unit 54 can sequentially determine the correction amounts of the pixel data VinA and VinB so that 'VoutA = 40 and VoutB = 5 . In this way, when the adjacent pixels sequentially arranged from the white display pixel to the black display pixel in the pretilt direction are selectively (preferred) corrected, the ratio of the pixel data is from VinB/VinA = 40/. 0 becomes smaller VoutB/VoutA = 40/5, which is ideal. In this manner, the correction amount determination unit 54 determines the correction amount of the pixel data by -15 to 1375210 times, and the correction amount is output to the error correction correction unit 55. Returning to the description of FIG. 5, the disclination correction unit 55 adds the correction amount determined by the correction amount determining unit 54 to the pixel data of the billions recorded in the unit 52, thereby generating the corrected image signal. The output image data Dout' is output to the data driver 12 in the liquid crystal display unit. Next, the action of the liquid crystal display element of this embodiment will be described. In the reflective liquid crystal display device, as shown in FIG. 2, the incident light L1 incident from the opposite substrate 30 side and passing through the vertical alignment liquid crystal 2 is reflected by the reflection function of the reflective pixel electrode 42. . The light L1 reflected by the reflective pixel electrode 42 is emitted perpendicularly to the liquid crystal 2 and the counter substrate 30 in the opposite direction to the incident direction. At this time, the vertical alignment liquid crystal 2 changes the optical characteristics due to the potential difference between the electrodes facing the direction, and modulates the passing light L1. By the optical modulation, the gradation expression can be realized, and the modulated light L2 is used for applying the voltage of the vertical alignment liquid crystal 2 by the image display, and the pixel driving circuit 1 shown in FIG. 1 is used. 4 and proceed. The data driver 12 supplies the image signal to the data line 1 2 A in response to the output image signal Dout input from the pixel signal correcting unit 5 via the signal line 15. The scan driver 13 is in a specific timing, and sequentially supplies scan signals to the respective scan lines 13A. Thereby, the pixel scanned by the scanning signal from the scanning line 13A and applied with the portion of the image signal from the data line 1 2 A is selectively driven. -16- 1375210 Here, in the pixel signal correcting unit 5 shown in Fig. 5, for each pixel 1 1 ' in the display area 10 based on the input image signal Din from the outside, one pixel is used. The pixel data of each pixel is sequentially corrected so that the voltage ratio between the applied voltage (driving voltage) and the applied voltage to the adjacent pixel becomes smaller. Specifically, the pixel data subjected to gamma correction by the gamma correction unit 51 is recorded in the memory unit 52 ′, and the pixel data of one pixel is compared by the comparison unit 53 based on the pixel data of the megapixel. The pixel data of the adjacent pixel. Then, based on the comparison result, the correction amount determining unit 54 compares the voltage between the applied voltage of one pixel and the voltage applied to the adjacent pixel by using, for example, the correction tables 7 and 71 shown in FIG. When the threshold 値 is still large, for example, as shown in FIGS. 6 to 8 , the voltage ratio is made smaller, and the display gradation or gradation ratio of each pixel 11 is close to the desired ,, and each of them is sequentially corrected. Pixel data of the pixel. Then, based on the corrected pixel data (output image signal Dout), the display driving is performed in the liquid crystal display unit 1. As described above, in the liquid crystal display device of the present embodiment, in the pixel signal correcting portion 5, the voltage ratio between the applied voltage to one pixel and the applied voltage to the adjacent pixel is made smaller. In this manner, the pixel data (input image signal Din) of each pixel 11 is sequentially corrected, and the display driving of the liquid crystal display unit 1 is performed based on the corrected pixel data (output image signal Dout), so that it can be successively reduced. The occurrence of alignment failure (Disclination) of the liquid crystal due to a voltage difference between adjacent pixels is suppressed, and deterioration of image reproducibility is suppressed. Therefore, regardless of the content of the -17-1375210 of the displayed image (after inputting the image signal Din), it is possible to achieve good image quality. Further, the correction amount determining unit 54 in the pixel signal correcting unit 5 determines the amount of correction using, for example, a specific correction table shown in Fig. 6. Therefore, it is only necessary to select a predetermined correction amount and perform the processing at a simple and high speed. Correction. In addition, when the pixel data of one side is black level (or near the black level), after the pixel data of the black level is preferentially increased, that is, when the applied voltage of the display pixel is increased, even if the pixel data is not Producing large changes' is also more effective in reducing the ratio of pixel data. Therefore, it is easier to eliminate misalignment of the liquid crystal. Further, when the adjacent pixels sequentially arranged from the white display pixel to the black display pixel in the pretilt direction along the vertical alignment liquid crystal 2 are selectively (preferred) corrected, the liquid crystal alignment is easily generated due to the alignment. The defective part is corrected so that the pixel signals can be corrected more efficiently. Further, since the correction is performed by determining the priority order of the correction, it is possible to avoid the occurrence of omission in the correction processing. The pretilt direction of the vertical alignment liquid crystal 2 is, for example, a diagonal direction of the pixel (in the direction of a horizontal direction or a vertical direction of 45 degrees when the pixel is square), and is configured to follow a liquid crystal molecule The direction of the horizontal or vertical component of the vector of the tilt direction selectively (preferredly) corrects each adjacent pixel pair that transitions from a state representing a white display pixel to a state representing a black display pixel. Specifically, the comparison unit 53 can detect that each pixel is a white display pixel or a black display pixel. Then, when the alignment film is formed on the pixel electrode by tilting the liquid crystal molecules from the lower right side -18-1375210 to the upper left side, the comparison portion 53 detects that the adjacent pixel pair is a black display pixel on the left side. When the right side is a white display pixel and is sequentially arranged, the correction amount determining unit 54 is configured to selectively (predeterminely) perform correction. Further, for example, as shown in the timing chart of FIG. 9 , it is used for a specific plurality of frame periods (or three horizontal periods (one horizontal period = 1H) up to the timings t10 to 113 of the plurality of field periods) The time integral of the reflectance of each of the pixels 11 is used as a determination index, and the pixel data is sequentially corrected as shown by arrows P7 5 and P76 in the figure, for example. In such a configuration, when the pixel signal does not change during the plurality of frame periods, the deterioration of the image quality reproducibility due to the occurrence of the disclination can be effectively suppressed. <Configuration of Liquid Crystal Display Device> Next, an example of a liquid crystal display device using the liquid crystal display element having the configuration shown in Fig. 1 will be described. Here, as shown in Fig. 1, an example of a reflective liquid crystal projector (liquid crystal projector 8) using a reflective liquid crystal display element as a light bulb will be described. The liquid crystal projector 8 is a so-called three-piece type in which a liquid crystal light bulb 8R, 8G, and 8B are used for displaying three colors of red, blue, and green colors. This reflective liquid crystal projector is provided with a light source 8 1 along the optical axis OL; a dichroic beam splitter 8 2, 8 3 ; and a total reflection mirror 84. Further, the liquid crystal projector 8 is provided with polarizing beamsplitters 8 5, 86, and 8 7; a composite lens 8 8 : a projection lens 89; and a screen 80. The light source 8 I is a white light that emits red light (R), -19- 1375210 blue light (B), and green light (G) required for color image display, such as a halogen lamp, a metal halide lamp, or a xenon lamp. And so on. The dichroic beam splitter 82 has a function of separating light from the light source 81 into blue light and light of other colors. The dichroic beam splitter 83 has a function of separating the light passing through the dichroic beam splitter 82 into red light and green light. The total reflection mirror 84 reflects the blue light separated by the dichroic beam splitter 82 toward the polarization beam splitter 87. The polarizing beamsplitters 85, 86, and 87 are disposed along the light paths of red light, green light, and blue light, respectively. Each of the polarization beam splitters 85, 86, and 87 has polarization separation surfaces 85A, 86A, and 87A, and the polarization separation surfaces 85A, 86A, and 87A have two polarization components that are orthogonal to each other. Features. The polarization separation surfaces 85A, 86A, and 87A transmit a polarization component (for example, an S polarization component) on one side and transmit a polarization component (for example, a P polarization component) on the other side. The liquid crystal light bulbs 8R and 8G' 8B are composed of the reflective liquid crystal display elements (Fig. 1 and Fig. 2) having the above configuration. The color light of a specific polarized component (for example, an S-polarized component) separated by the polarization separation surfaces 85A, 86A, and 87A of the polarization beam splitters 85, 86, and 87 is incident on the liquid crystal light bulbs 8 R, 8 G, and 8 B. The liquid crystal light bulbs 8 R, 8 G, and 8 B have a function of modulating the incident light according to the driving voltage given by the pixel signal, and directing the modulated light toward the polarizing beamsplitters 85, 86, 8 7 The function of reflection. The synthetic 稜鏡88 system has color light which is emitted from the liquid crystal light bulbs 8R, 8G, and 8B and which is polarized by the polarizing beamsplitters 85, 86, 87 to a specific polarization of -20 to 1375210 (for example, a p-polarized component). The function to be synthesized. The projection lens 89 has a function of projecting a projection light that is emitted from the composite pupil 88 toward the screen 80. In the reflective liquid crystal projector 8 configured as described above, the white light emitted from the light source 81 is first separated into blue light and other colors (red light and green light) by the function of the dichroic beam splitter 82. . Among them, the blue light is reflected toward the polarization beam splitter 87 by the function of the total reflection mirror 84. On the other hand, the red light and the green light are separated into red light and green light by the function of the dichroic beam splitter 83. The separated red light and green light are incident on the polarization beam splitters 85 and 86, respectively. The polarization beam splitters 85, 86, and 87 separate the incident light beams into two orthogonal polarization components in the polarization separation surfaces 85A, 86A, and 87A. At this time, the polarization separation surfaces 85A, 86A, and 87A reflect the polarized component (for example, the S-polarized component) on one side toward the liquid crystal light bulbs 8R, 8G, and 8B. • The liquid crystal light bulbs 8R, 8G, and 8B are driven by the driving voltage given by the pixel signal, and the color light of the specific polarizing component incident is modulated in units of pixels. At this time, since the liquid crystal light bulbs 8R, 8G, and 8B are composed of the reflective twin crystal display elements shown in FIG. 1 and FIG. 2, good characteristics can be realized with respect to characteristics such as contrast and image quality. The liquid crystal light bulbs 8R, 8G, and 8B reflect the modulated color lights toward the polarization beam splitters 85, 86, and 87. Among the reflected light (modulated light) from the liquid crystal light bulbs 8R, 8G, and 8B, the polarizing beamsplitters 85, 86, and 87' pass only a specific polarizing component (for example, a p-polarizing component), and are directed toward - 21 - 1375210 is injected into the synthetic 稜鏡88. The synthetic 稜鏡88 is synthesized by the color light of the specific polarizing components of the polarizing beamsplitters 85, 86, 87, and is emitted toward the projection lens 89. The projection lens 89 projects the synthesized light emitted from the composite 稜鏡8 8 toward the screen 80. Thus, the image of the light modulated by the liquid crystal light bulbs 8R, 8G, and 8B is projected on the screen 80. And perform the desired image display. As described above, in the liquid crystal projector of the present embodiment, since the reflective liquid crystal display elements shown in FIGS. 1 and 2 are used as the liquid crystal light bulbs 8R, 8G, and 8B, the cause can be reduced successively. The occurrence of alignment failure (dislocation) of the liquid crystal with a voltage difference between adjacent pixels is suppressed, and deterioration of image reproducibility is suppressed. Therefore, it is possible to realize image display with high image quality and high reproducibility. [Second embodiment] Next, a second embodiment of the present invention will be described. In the first embodiment, a so-called analog method in which an applied voltage (driving voltage) is changed according to image data is described. However, in the present embodiment, PWM (Pulse Width Modulation) is performed based on image data. Modulation) The so-called digital way of driving. Fig. 1 is a timing chart showing a driving method of a liquid crystal display element as a general digital method, and (A) to (H) respectively represent one color gradation (= pixel data of "000000 1"; black level), two colors Level (= pixel data of "00000 1 0"), pixel data of 4 gradation (= "〇〇〇〇1 〇〇"), pixel data of 8 gradation "000〗000", 16 gradation (= "0010000" pixel -22- 1375210 data), 32 gradation (= "0 1 0000" pixel data), 64 gradation (= "1 000000" pixel data) and 127 color gradation] 丨]]] Pixel data; white order). In the driving method of the digital method, by giving weight to each pixel of the pixel data, the width ‘ of the period during which the voltage is applied to each pixel 11 can be changed to perform gradation display. In addition, the time of one field is divided into 128, and the divided areas of the first to 64, 64 to 96, 96-112, 112 to 120, 120 to 124, 124 to 126, and 126 to 127 are included. A V100 voltage or a V0 voltage is applied in combination. Therefore, in the liquid crystal display device of the present embodiment, the voltage ratio between adjacent pixels is larger, corresponding to the applied voltage corresponding to the "0 (L; low)" level and the corresponding "i (H; high) ) The voltage ratio between the applied voltages. Therefore, in the present embodiment, as shown in the timing chart of FIG. 2(A)'(B), the applied voltage corresponding to the "0 (L; low)" level is set to be higher (this is The time is changed from "0" to "10", and the applied voltage corresponding to the "1 (H; high)" level is set to be low ("100" is changed to "95" at this time). Further, as shown in the timing chart of Figs. 3(A) and (B), the setting of the applied voltage corresponding to the "〇 (L; low)" level may be changed (changed to be higher). At this time, as described in the first embodiment, the voltage ratio can be easily lowered even if the setting is not changed largely. Further, for example, as shown in the timing charts of FIGS. 14(A) and (B), the application period of the voltage can be made to match the adjacent pixels 1 1 A and 1 1 B for a longer period of time. The period during which the voltage is applied is shifted by -23-1375210 bits in the time axis direction. This is because, as shown in FIG. 1 , in the conventional digital driving method, for example, the time of one field is divided by 1 2 8 and the first to 64, 64-96 '96 The combination of the divided regions of ~112, 112-120, 1 20- 1 24 '124 to 126, and 126 to 127 applies the V100 voltage or the V0 voltage, so the application period of the more frequently generated voltage does not coincide with the adjacent pixels. The reason. Specifically, in the case of Fig. 14, the voltage application period of the pixel 11B is maximized in the voltage application period of the pixel 11B in each horizontal period as shown by the arrows P77 and P78 in the figure. The shift is performed in the same manner (the voltage application period is shifted in the time axis direction between the timings t53 to t54 and the timings t55 to t56). In such a configuration, it is not necessary to change the applied voltage corresponding to the "〇 (L; low)" level or the applied voltage corresponding to the "1 (Η; high)" level as described above, and the voltage ratio between adjacent pixels can be changed. The period of becoming larger is suppressed to a minimum. As described above, in the liquid crystal display device of the present embodiment, in the pixel signal correcting portion 5, the voltage ratio between the applied voltage to one pixel and the applied voltage to the adjacent pixel is also increased. The small method is used for the successive corrections', so that the same effect as the first embodiment can be obtained. In other words, the occurrence of alignment failure (dislocation) of the liquid crystal due to the applied voltage difference between the adjacent pixels can be sequentially reduced, and the deterioration of the image reproducibility can be suppressed. Therefore, the image display of good image quality can be achieved regardless of the content of the displayed image. The liquid crystal display element of this embodiment can be applied to one of the liquid crystal projectors in the same manner as in the first embodiment, and the same effect as that of the embodiment of the invention can be obtained. [Embodiment] Next, specific characteristics of the liquid crystal display element of the above embodiment will be described by way of examples. Hereinafter, before describing the embodiment, the characteristics of the conventional liquid crystal display element will be described first by way of a comparative example. Φ [Comparative Example 1] A sample of the reflective liquid crystal display device of Comparative Example 1 was produced in the following manner. First, the glass substrate on which the transparent electrode was formed and the ruthenium substrate were washed, and then introduced into a vapor deposition apparatus at a vapor deposition angle of 45 to 55. Within the range, the SiO 2 film was vapor-deposited to form an alignment film. The film thickness of the alignment film is set to 25 to 100 nm so that the pretilt angle of the liquid crystal becomes about 3. The way of the alignment control. Then, between the two substrates on which the alignment film is formed, only about 2 μm diameter of the glass beads are dispersed in an appropriate amount and the two are attached together. The dielectric anisotropy Δ £ made by Merck is negative, and the refractive index is negative. The vertical alignment liquid crystal material of the anisotropy Δ η = 0·1 1 is implanted, whereby a reflective liquid crystal display element having a liquid crystal layer thickness of about 2 μm is produced. Pixel electrodes which can be used to control the driving voltage are independently provided on the above-mentioned germanium substrate. These pixel electrodes are formed by squares having a side of 6 μm, and each pixel is separated by a groove of 0·3 μηι, and further, on the surface, An aluminum reflective film is formed. After the production, a voltage corresponding to an AC rectangular wave of about 60 Hz is applied to these pixels to obtain a relationship with the amplitude voltage. In addition, the voltage V100 of the maximum reflectivity is expressed as -25-1375210 and will be T100 at this time. Then, the reflectance is TX at X% of T100, and the voltage at this time is set to the voltage Vx. Then, the reflective liquid crystal display element is used to measure the pixels 1 and 2 and the pixels 3 and 4 which are image-displayed in the various pixel patterns (the pattern of the western checkerboard which is black 2x2 pixels for each of the two columns). Reflectivity. The respective reflection efficiency E of the adjacent pixels (=the average 値 of the ratio 値 of the expected reflectance of the actual integral reflection), and the contrast C between the connected pixels (=the expected reflectance of the actual integrated reflectance) The ratio of 値 to 値), respectively, and the second indicator. Fig. 16 shows the relationship between the transmittance T thus obtained and the contrast C (when V40 is one of the adjacent pixels). In Fig. 16, the electric system between adjacent pixels is far from T40 with the transmittance T, and the reflection efficiency E is gradually away from 1 〇〇. Therefore, it can be confirmed that it is difficult to be large from the expectation. [Example 1], 1 -2] A sample of the reflective liquid crystal display element was not substantially obtained in the same manner as in Comparative Example 1 described above. However, in the present embodiment, the difference from the above-described Comparative Example 1 is that the transmittance setting transmittance is set to 15 (A) ' (as shown in Fig. 6 to Fig. 8 or Fig. 9 of the respective types). B) The pattern of white and the neighboring ones are also adjacent to each other. The ratio of the pixel to the pixel in the pixel and the ratio of the neighboring ratio to the pixel are the first index reflection efficiency E and the voltage before the correction becomes larger. At this time, the error of the comparison of C is gradually increased: and the specification, the production example 丨-〗, 1 - 2 丨 The first embodiment is such that the voltage ratio between the adjacent -26-1375210 elements is reduced as much as possible. The pixel pattern shown in FIGS. (A) and (B) is sequentially corrected to perform image display. The first table shows an example of the measurement results of Comparative Example 1 and Example 1 -, 1 - 2 rate E, and contrast C ( When the voltage before correction is V40 in the adjacent pixel, if the reflection efficiency E is 0 and the contrast C is 0·60 or more, it is considered that the image image is extremely excellent in image quality. In Comparative Example 1, some of these are used. In contrast, in Examples 1-1 and 1-2, both of them are higher than these ruthenium. The voltage between adjacent pixels is still low, and the display quality is also improved. In addition, 'the implementation of several 値 is higher than that of the embodiment 1-2, so that the display quality can be improved, and the first reflection effect is One of 0.70 or more can maintain the actual system lower than the number of comparisons. Comparative Example 1-1 goes further.

-27- 1375210

Mm 遁-1.3 V95/5 0.93 0.93 0.93 1.20 V90/20 0.91 1.12 0.91 1.12 0.91 1.12 V50/45 〇〇0.98 1.00 0.98 1.00 0.98 V45/50 0.98 1.00 0.98 1.00 0.98 1.00 pillj ϋ V20/90 0.70 0.63 0.94 0.84 0.82 0.72 V5/95 0.56 0.48 0.92 0.82 0.80 0.70 Voltage ratio (pixel 1 / pixel 2) V95/5 0.93 1.10 0.98 1.05 0.93 1.10 V90/20 0.95 1.08 0.97 s 0.96 1.08 V50/45 1.00 1.01 1.00 1.00 1.00 1.01 V45/50 0.98 1.00 1.00 1.00 0.98 1.00 V20/90 0.70 0.71 0.88 0.70 0.85 0.73 V5/9 5 0.58 0.53 0.85 0.70 0.85 0.68 u PQ u U Comparative Example 1 Example 1-1 Example 1-2 -28- 1375210 [Comparative Example 2] Basically, in the same manner and specifications as in Comparative Example 1, a sample of a reflective liquid crystal display element was produced. However, in Comparative Example 2, the difference from the above-described Comparative Example 1 is that the driving method of the digital method described in FIG. 1 is performed, that is, the time of one field is divided by 1 2 8 and A 7-bit digital bit driving method in which a V100 voltage or a VO voltage is applied in a combination of divided areas of the first 64, 64 to 96, 96 to 112, 112 to 120, 120 to 124, 124 to 126, and 126 to 127 Image display is performed by the pixel pattern shown in Fig. 15 (A) and (B). [Examples 2-1 and 2-2] A sample of a reflective liquid crystal display element was produced in substantially the same manner and specifications as in Comparative Example 1 described above. However, in the second and second embodiments, the second embodiment is different from the first comparative example described above, and the successive corrections as described in the second embodiment or the fourth embodiment of the second embodiment are respectively performed. The pixel patterns shown in Figs. 1(A) and (B) are displayed as images. The second table shows an example of the measurement results of the reflection efficiency E and the comparison C of Comparative Example 2 and Examples 2-1 and 2-2 (the pre-correction gradation of one of the adjacent pixels is (40/1 2 8)) When the color scale is). It is the same as in the first table. In Comparative Example 2, it is lower than the enthalpy in a part. In contrast, in Examples 2-1 and 2_2, all the numbers are higher than these enthalpies. Therefore, it can be seen that the voltage between the adjacent pixels is lower than that of Comparative Example 2, and the display quality is also improved. Further, several 値 of the embodiment 2-4 are higher than the embodiment 2 _ 1 so that the display quality can be further improved. -29- 1375210

Voltage ratio (pixel 3/pixel 4) V95/5 0.89 0.33 0.91 0.70 0.93 0.72 V90/20 0.93 0.77 0.95 0.90 0.94 0.92 V50/45 0.63 0.30 0.81 0.71 0.99 0.98 V45/50 0.62 0.25 0.81 0.65 0.99 0.98 V20/90 0.47 0.37 0.75 0.70 0.80 0.75 V5/95 0.28 0.26 0.71 0.71 0.76 0.73 Voltage ratio (pixel 1 / pixel 2) V95/5 0.93 0.48 0.94 0.75 0.94 0.77 V90/20 0.96 0.81 0.97 0.90 0.98 0.93 V50/45 0.72 0.47 0.87 0.78 1.00 0.98 V45 /50 0.72 0.40 0.87 0.66 0.99 0.98 V20/90 0.59 0.51 0.79 0.77 0.84 0.82 V5/95 0.43 0.42 0.74 0.70 0.75 0.73 U Ρ-1 UU Comparative Example 2 Example 2-1 Example 2-2 -30- 1375210 [Comparative Example 3] A sample of a reflective liquid crystal display element was produced in substantially the same manner and specifications as in Comparative Example 1 described above. However, in Comparative Example 3, the voltage difference between the adjacent pixels (set to the pixels A and B) having different pixel driving voltages is determined (= (voltage of pixel B VB - voltage VA of pixel A)) The indicator 'corrects in such a way that the voltage ratio becomes smaller. Φ [Example 3] A sample of a reflective liquid crystal display element was produced in the same manner as in the above-described Comparative Example 1. Further, in the third embodiment, as in the above-described embodiments 1-1, 1-2, 2-1, and 2-2, the voltage ratio between the pixels A and the pixels B (= (VB/VA)) is used. In order to judge the index, correction is performed in such a manner that the voltage ratio becomes smaller. Fig. 18(A) shows one of the correlations between the voltage difference between adjacent pixels and the reflection efficiency E according to the measurement result of Comparative Example 3 (in the case of changing VA to V1, V5, V20) , V40, V60, V80, V95, V100). Further, Fig. 18(B) shows an example of the correlation between the voltage ratio between adjacent pixels and the reflection efficiency E according to the measurement result of the embodiment 3 (in the case of changing VA to VI, V5, V20, V40, V60, V80, V95, V100). From these, it can be seen from Fig. 18 (A) and (B) that the reflection efficiency E due to the disclination caused by the difference in the pixel driving voltage of the adjacent pixels is lower than that of the comparative example 3. The voltage difference is more clearly dependent on the voltage ratio of the third embodiment. Therefore, when determining the order of the correction or the priority -31 - 1375210, the voltage difference between the adjacent pixels is used as the judgment index to select (determine) the correction as compared with the voltage difference between the adjacent pixels. The pixels of the object are more efficiently corrected. Further, with respect to the correction amount, the correction is performed in such a manner that the voltage difference between the adjacent pixels is made smaller, so that the correction can be performed more effectively. The present invention has been described above with reference to the first and second embodiments and the embodiments thereof. However, the present invention is not limited to these embodiments and can be variously modified. For example, in the above-described embodiment, the liquid crystal in the liquid crystal display unit 1 is a case where the liquid crystal 2 is vertically aligned. However, the present invention is also applicable to, for example, a horizontal alignment liquid crystal, a ferroelectric liquid crystal, or the like. A liquid crystal mode of various modes such as liquid crystal OCB liquid crystal of TN (Twisted Nematic) mode. Further, in the above-described embodiment and the like, a case of a reflective liquid crystal display device and a liquid crystal display device will be described, but the present invention is also applicable to, for example, a transmissive or semi-reflective semi-transmissive liquid crystal display device. And a liquid crystal display device. However, in the case of the reflection type, as shown in FIG. 2, the pixel drive circuit 14 is formed under the pixel electrode 42, and the pixel pitch and the pixel gap tend to be narrower than the transmissive type, so that alignment failure is more likely to occur ( Wrong). Therefore, this effect is more effective especially when applied to a reflective type. Further, in the present invention, as shown in Fig. 17 (A) and (B), it is preferable to drive the liquid crystal display element by frame inversion driving or field inversion driving, and this frame is reversed. Rotary drive or field reversal drive, in each -32- 1375210 frames or fields, in the positive direction (in Figure 17 (A), each pixel 1] is applied in the mode direction as "+") and the negative direction (in the Fig. 17 (B), 'the direction of the application direction in each pixel 1 is shown as "·"), the direction in which the pixel driving voltage is applied is reversed. This is because the occurrence of misalignment (dislocation) is reduced when this drive is performed. In the above-described embodiment, a reflective liquid crystal projector (liquid crystal projector 8) using a liquid crystal display element as a light bulb is described as an example of a liquid crystal display device using the liquid crystal display element of the present invention. However, the liquid crystal display element of the present invention can also be applied to a TV (Television) device 'PDA (Personal Digital Assistants), a mobile phone, or the like. Fig. 19 is a view showing an example of a circuit configuration when the liquid crystal display element (the liquid crystal display unit 1 and the pixel signal correcting unit 5) described in the above embodiment is applied to a TV device. For example, the TV device 9 includes: an analog analog tuner 9 1 A that receives an analog broadcast wave signal and performs demodulation, and outputs an image signal and an audio signal as a baseband signal; and the digital broadcast wave signal is received. A digital tuner 91B that performs demodulation and is output as an MPEG-TS data stream signal; a selector 91C that inputs an external input data D1 (MPEG-TS data stream signal, etc.); a slave tuner 91B or a selection The MPEG-TS data stream signal outputted by the device 91C is demodulated, and the MPEG (Moving Picture Experts Group) decoder 92B is output as a digital component signal; the fundamental frequency signal of the image is demodulated. The A/D (digital/analog ratio) conversion is performed, and the image signal conversion circuit 92A, which is output as a digital component signal, performs A/D conversion on the fundamental frequency signal of the sound output from the analog tuner 9IA to -33-1375210. And an audio signal A/D (Analog/Digital) circuit 93A output as a digital audio signal; outputted from the audio signal A/D circuit 93 A or the sound image signal decoder 98D described later a sound signal processing circuit 93B for performing a specific sound signal processing such as level adjustment, synthesis, or stereo processing; and an audio signal amplifying circuit 93C for amplifying the sound signal to a desired volume; The subsequent audio signal is output to the external speaker 96. For the digital audio signal output from the image signal conversion circuit 92A or the MPEG decoder 92B, a specific image signal processing such as contrast adjustment, color adjustment, or brightness adjustment is performed. The signal processing circuit WB; the pixel signal correcting unit 5 and the liquid crystal display unit 1 described in the above embodiment; the remote control light receiving unit 97A that receives the remote control signal S1 from the remote controller; for example, via a wired area network ( An external network (not shown) such as LAN: Local Area Network), and a network terminal portion 97B for inputting external input data D2 (audio signal and image signal); as input from the network terminal portion 9 7B to the audio signal And the network I/F (interface) 97C of the interface part of the image signal; the CPU that controls the overall operation of the TV device 9 (Central Processing Unit) : central processing unit 98A; flash ROM (Read Only Memory) 98B storing a non-volatile memory unit of a specific software or the like used by the CPU 98A; as a record corresponding to the execution area of the CPU 9SA SDRAM (Synchronous Dynamic Random Access Memory) 98C; and demodulation of image signals and audio signals input from the outside via the network terminal unit 97B and the network I/F 97C-34 - 1375210

Sound and image signal decoder 98D which is changed as a digital component signal and a digital audio signal. In addition, network I/F97C, CPU98A, flash ROM98B, SDRAM98C and audio. Image signal decoder 98D, for example, by PCI (Peripheral Component)

Interconnect: the peripheral component connection interface) The internal busbars B1 of the busbars and the like are connected in common. In the TV device 9 formed in such a configuration, the liquid crystal display element described in the above embodiment can also be used, so that the same effect as in the above embodiment can be achieved, and high contrast and good image quality can be achieved. The image is displayed. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an explanatory view showing a configuration of a liquid crystal display element of a first embodiment of the present invention. Fig. 2 is a cross-sectional view showing the configuration of a liquid crystal display unit shown in Fig. 1. Fig. 3 is a cross-sectional view showing the alignment failure occurring in the conventional liquid crystal display device. Fig. 4 is a cross-sectional view showing the misalignment following Fig. 3. Fig. 5 is a functional block diagram showing the detailed construction of the image signal correcting unit shown in Fig. 1. Figure 6 is a diagram showing the correction table. Fig. 7 is a view for explaining the image signal correction function of the first embodiment. -35 - 1375210 Fig. 8 is a view showing a pattern correction function for explaining a modification of the first embodiment. Fig. 9 is a view showing a pattern correction function for explaining a modification of the second embodiment. Fig. 1 is a block diagram showing an example of a liquid crystal display device constructed using the liquid crystal display element shown in Fig. 1. The figure is a timing chart showing the driving method of the liquid crystal display element according to the digital mode. Fig. 1 is a view showing a pattern correction function for explaining the second embodiment. Fig. 1 is a view showing a drawing of the image of the modification of the second embodiment, and an image signal correction function. Fig. 14 is a view showing a picture signal correction function for explaining a modification of the second embodiment. Fig. 15 is an explanatory view showing a pixel pattern of the liquid crystal display element used in the examples and the comparative examples. Fig. 6 is a characteristic diagram showing the relationship between the transmittance of the liquid crystal display element of the comparative example and the reflection efficiency and contrast of the image. Fig. 17 is a view showing a pattern signal correction function for explaining a modification of the present invention. Fig. 18 is a characteristic diagram for comparing the reflection efficiencies of Comparative Example 3 and Example 3. Fig. 19 is a view showing a configuration of another example of a liquid crystal display device using the liquid crystal display element of the present invention. -36- 1375210 [Explanation of main component symbols] 1 : LCD display part • I 〇: display area. 1 1 : Pixel 1 2 : Data driver 1 2 A : Data line 13 : Scan driver 1 3 A : Scan line 1 4: pixel drive circuit 1 5 · signal line 2: liquid crystal (vertical alignment liquid crystal) 30: opposite substrate 3 1 : glass substrate 3 2 : transparent electrode 33, 43 : alignment film • 40 : pixel electrode substrate 41 : germanium substrate 42 : reflective pixel electrode 5 : pixel signal correction unit 5 1 : gamma correction unit 5 2 : memory unit 5 3 : comparison unit 54 : correction amount determination unit 5 5 : error correction unit - 37 - 1375210 7 , 7 1 : Correction Table 8: Liquid crystal projector. 8R, 8G, 8B: Liquid crystal light bulb. 80: Screen 8 1 : Light source 82, 83: Dichroic beam splitter 84: Total reflection mirror # 85~87 : Polarizing beam splitter 88: Synthetic 稜鏡 8 9 : Projection lens 9 : TV device 9 1 A : Analog tuner 9 1 B : Digital tuner 91C : Selector 92A : Image signal conversion circuit φ 92B : MPEG decoder 93A : Acoustic signal A/D circuit 93B: audio signal processing circuit 93C: audio signal amplifying circuit 94B: picture signal processing circuit 96: speaker 97A: remote control unit 97B: Network Terminal 97C: Network I/F (Interface) -38- 1375210

98A : CPU 98B : Flash ROM 98C: SDRAM 98D : Sound · Image Signal Decoder -39

Claims (1)

1375210 X. Patent Application No. 1 - A liquid crystal display device, comprising: a liquid crystal display panel including a plurality of pixels for performing image display; and a voltage applied to one pixel A driving means for driving display driving of the liquid crystal display panel while sequentially correcting the pixel data of each pixel so that the voltage ratio between the applied voltages of the adjacent pixels becomes smaller. 2. The liquid crystal display device as claimed in claim 1, wherein the driving means comprises: comparing a pixel data of one pixel with a pixel data of the adjacent pixel; and comparing results from the comparison circuit a correction circuit for sequentially correcting pixel data of each pixel so that the voltage ratio becomes smaller than the threshold 于 when determining that the voltage is greater than a specific threshold ;; and correcting by the correction circuit The pixel data is used to drive the display drive. 3. The liquid crystal display device according to claim 1, wherein the driving means refers to a pixel material for defining one pixel and a pixel data of the adjacent pixel and a correction amount between the pixels The correction table of the relationship performs the successive correction of the above pixel data. The liquid crystal display device according to claim 1, wherein the driving means performs the successive correction of the pixel data by setting the application voltage of the black display pixel to be higher than the original voltage. . The liquid crystal display element according to the first aspect of the invention, wherein the driving means is based on the pixel data to perform PWM (Pulse Width Modulation) driving, and the Pwm pulse is "L". The (low)" level voltage is set higher and the "Η (high)" level voltage of the pwM pulse is set lower. 6. The liquid crystal display device according to claim 1, wherein the driving means performs PWM driving based on the pixel data and applies voltage during a voltage application period in which adjacent pixels overlap each other for a longer period of time. The application period is shifted in the direction of the time axis. The liquid crystal display device according to the first aspect of the invention, wherein the liquid crystal display panel comprises a vertical alignment liquid crystal molecule having a specific pretilt angle. 8. The liquid crystal display device according to claim 7, wherein the driving means is a horizontal component or a vertical component of a vector along a direction in which the vertical alignment liquid crystal molecules are tilted when a voltage is applied to the pixel. The direction of the neighboring pixel pair moving from the white display state to the black display state selectively performs the successive correction of the pixel data. The liquid crystal display device according to claim 1, wherein the liquid crystal display panel is a reflective liquid crystal display panel; and the driving means is based on a time integral of a reflectance of a pixel during a plurality of frames. Perform successive correction of the above pixel data. 10. The liquid crystal display device according to claim 1, wherein the driving means performs the display driving by a field inversion driving method or a frame inversion driving method. The liquid crystal display device according to the above aspect of the invention, wherein the liquid crystal display panel comprises: a pixel electrode substrate having a plurality of reflective pixel electrodes; and having a surface opposite to the pixel electrode a counter substrate opposite to the electrode; and a liquid crystal injected between the pixel electrode substrate and the counter substrate; and configured as a reflective liquid crystal display element. 12. A liquid crystal display device comprising a liquid crystal display device and using a light modulated by the liquid crystal display device for image display, wherein the liquid crystal display device is provided with: a liquid crystal display panel configured by a plurality of pixels for image display; and sequentially correcting each pixel so that a voltage ratio between an applied voltage to one pixel and an applied voltage to the adjacent pixel is made smaller The pixel data 'drives the display drive of the liquid crystal display panel described above. A liquid crystal display device as described in claim 12 is configured as a liquid crystal projector, wherein the liquid crystal projector includes a light source; and is emitted from the light source and modulated by the liquid crystal display element The projected light is projected onto the screen. 1 . A method of driving a liquid crystal display element, which is a method for driving a liquid crystal display element including a liquid crystal display panel including a plurality of pixels for performing image display, wherein: comparing pixel data of one pixel with the pixel data Pixel data of adjacent pixels; -42- 1375210 From the comparison result, when it is determined that the voltage ratio between the applied voltage of the one of the pixels and the applied voltage of the adjacent pixel is larger than a specific threshold, the voltage ratio is made smaller than the threshold The pixel data of each pixel is sequentially corrected; the display driving is performed according to the corrected pixel data. -43-