Abstract: An LCD device includes: an LC panel which exhibits different gamma curves under different view angles, and a display control circuit which divides a single frame period into first and second display periods and divides a display region of the LC panel into first and second regions. The display control circuit has a luminance computing section which computes A to D so that A to D satisfies A+C=B+D and A?B?D as well as C?B?D, where A and C are gray-level luminances, A and B are the white luminances of pixel data displayed in the first and second regions, respectively, during the first display period, and C and D are the white luminances of pixel data displayed in the first and second regions, respectively, during the second display period.

Abstract: A liquid crystal display device (1) of the present invention includes an image data obtainment section (6), a display (2), and a voltage application section (5), a certain gray scale in a first region of the image being displayed such that the voltage application section (5) applies voltages corresponding to the gray scale respectively on sub-pixels of at least four different elementary colors in a pixel displaying the first region, and the certain gray scale in a second region of the image different from the first region being displayed such that the voltage application section (5) applies, on at least one of sub-pixels in a pixel displaying the second region, a voltage larger than the voltage applied on one of the sub-pixels in the pixel displaying the first region which one corresponds in color to said at least one of the sub-pixels in the pixel displaying the second region, and applies, on at least another one of the sub-pixels in the pixel displaying the second region, a voltage smaller than the voltage

Abstract: Provided is a liquid crystal display device which not only protects user's privacy but also improves a display quality of an image when a display is viewed from the front.

Abstract: An object of the present invention is to provide a liquid crystal display device capable of improving a viewing angle, while not decreasing an aperture ratio and preventing an increase in electricity consumption. A liquid crystal display device (1) of the present invention includes an active matrix substrate including a plurality of drain electrodes (14) disposed in a matrix form, a counter substrate including a plurality of common electrodes, and a liquid crystal layer being sandwiched between the active matrix substrate and the counter substrate, each of the plurality of drain electrodes (14) having formed (i) a subpixel (16a) part facing a first common electrode (11) among the plurality of common electrodes, across the liquid crystal layer, and (ii) a subpixel (16b) part facing a second common electrode (12) among the plurality of common electrodes, across the liquid crystal layer.

Abstract: Pixel circuits 6 have a rectangular shape longer in an extending direction of scanning signal lines than in an extending direction of data signal lines. Three pixel circuits 6 arranged in the extending direction of data signal lines form one pixel. A pixel having three pixel circuits 6 arranged in the order red, green, and blue, a pixel having three pixel circuits 6 arranged in the order green, blue, and red, and a pixel having three pixel circuits 6 arranged in the order blue, red, and green are repeatedly arranged in the extending direction of scanning signal lines. By this, when line inversion drive is performed using a data signal line drive circuit 4, voltages of different polarities are applied to three types of pixel circuits 6 in each line in each frame to cancel out the influence of the polarities of the applied voltages, thereby suppressing a color shift.

Abstract: In a driving method for driving a liquid crystal display device, each of frame periods is divided into a drive period in which a counter electrode is driven, and a drive suspension period in which the counter electrode is not driven. During the drive period, a data signal is outputted to a video signal line driving circuit at a frequency corresponding to a driving frequency for driving the counter electrode. During the drive suspension period, the outputting of the data signal is stopped. Thus, there are provided a liquid crystal display device and a driving method therefor, in which user aggravating sound is prevented without increasing power consumption.

Abstract: The present invention relates to a video signal line drive circuit of a display device. An object of the present invention is to, when gradation conversion is performed in the display device using an error diffusion method, provide a display with a smooth gradation change even at boundaries of display blocks. In an error diffusion operation circuit (36) of a source driver unit (302), an error diffusion process is performed for each pixel based on, in addition to image data (Da) for a display block of the source driver unit (302), image data (Da) for areas near boundaries between the display block of the source driver unit (302) and display blocks of source driver units (301, 303) in previous and subsequent stages. A video signal is generated based on error-diffused image data (Db) generated by the error diffusion process.

Abstract: In an active matrix display device having six or more data lines grouped to be connected to one output signal line of a data line drive circuit and including a color filter, the degradation of an image quality due to a parasitic capacitance or the like can be reduced effectively. In an active matrix display device including pixels of three colors having a stripe arrangement or a delta arrangement, n (n denotes a multiple of 3 that is 6 or larger) adjacent data lines DLs form one group and are connected to a source signal output line SO. The ON/OFF of a selection switch ASW provided for each data line DL is controlled so that, among the n data lines forming one group, data lines corresponding to pixels of a color with a contribution to brightness smaller than a contribution of at least another color among the three colors, e.g., blue of RGB, are connected first and last with the source signal output line SO during one horizontal period.

Abstract: A fixing unit 8 is fitted with a rail 28 along which a rail guide provided inside an image forming apparatus can slide. This allows the fixing unit 8 to be extracted out of the image forming apparatus. When the fixing unit 8 is extracted out of the image forming apparatus, a transferring body separating member 26, which has thus far been prevented from rotating by the rail 28, is made to rotate by the force applied by a tension spring 27. An end portion of the transferring body separating member 26 presses a transfer roller bracket 24 and thereby moves a transfer roller 17. Thus, the transfer roller 17 is separated from a photoconductor drum 2.

Abstract: In a gradation voltage generation circuit used in a video signal line driving circuit for driving video signal lines of a liquid crystal display device by time division based on switching control signals, a first variable resistor circuit is connected between one terminal of a voltage divider circuit for generating a gradation voltage group and a power source line for supplying a high-level voltage, and a second variable resistor circuit is connected between the other terminal of the voltage divider circuit and a power source line for supplying a low-level voltage. The resistances of the variable resistor circuits are switched based on the switching control signal. Thus, in the periods in which the video signal lines respectively connected to R, G and B pixel formation portions are driven, gradation voltages that are adapted to the gradation reproducibility for R, G and B are outputted respectively.

Abstract: A liquid crystal panel (500) is provided with a connection switching circuit (502) for connecting a video signal line driving circuit (300) to a plurality of video signal lines (Ls). The connection switching circuit (502) includes analog switches (SWi) that correspond to the video signal lines (Ls) and one side of each of the analog switches (SWi) is connected to one of the video signal lines (Ls). The video signal lines (Ls) are grouped together into groups of two video signal lines (Ls) that are spaced apart by one video signal line. The groups of video signal lines (Ls) respectively correspond to output terminals (TSj) of the video signal line driving circuit (300). The other sides of the analog switches (SWi) connected to the video signal lines (Ls) of the same group are connected to one another, and connected to one output terminal (TSj).

Abstract: A video signal line driving circuit includes, for each output terminal TSj, a unit precharge circuit made of a capacitor Cpr and switches SWA1, SWA2, SWB1 and SWB2 for connecting the capacitor Cpr in parallel to a capacitive load of a liquid crystal panel. An OFF period in which first and second output buffers are electrically disconnected from the video signal line is provided between a P period in which a positive voltage is to be applied from the first output buffer in the video signal line driving circuit to the video signal lines (capacitive load) and an N period in which a negative voltage is to be applied from the second output buffer. A first and a second precharge period are set within this OFF period.

Abstract: The present invention relates to a video signal line drive circuit of a display device. An object of the present invention is to, when gradation conversion is performed in the display device using an error diffusion method, provide a display with a smooth gradation change even at boundaries of display blocks. In an error diffusion operation circuit (36) of a source driver unit (302), an error diffusion process is performed for each pixel based on, in addition to image data (Da) for a display block of the source driver unit (302), image data (Da) for areas near boundaries between the display block of the source driver unit (302) and display blocks of source driver units (301, 303) in previous and subsequent stages. A video signal is generated based on error-diffused image data (Db) generated by the error diffusion process.

Abstract: A fixing unit 8 is fitted with a rail 28 along which a rail guide provided inside an image forming apparatus can slide. This allows the fixing unit 8 to be extracted out of the image forming apparatus. When the fixing unit 8 is extracted out of the image forming apparatus, a transferring body separating member 26, which has thus far been prevented from rotating by the rail 28, is made to rotate by the force applied by a tension spring 27. An end portion of the transferring body separating member 26 presses a transfer roller bracket 24 and thereby moves a transfer roller 17. Thus, the transfer roller 17 is separated from a photoconductor drum 2.

Abstract: In a driving method for driving a liquid crystal display device, each of frame periods is divided into a drive period in which a counter electrode is driven, and a drive suspension period in which the counter electrode is not driven. During the drive period, a data signal is outputted to a video signal line driving circuit at a frequency corresponding to a driving frequency for driving the counter electrode. During the drive suspension period, the outputting of the data signal is stopped. Thus, there are provided a liquid crystal display device and a driving method therefor, in which user aggravating sound is prevented without increasing power consumption.

Abstract: A video signal line driving circuit includes, for each output terminal TSj, a unit precharge circuit made of a capacitor Cpr and switches SWA1, SWA2, SWB1 and SWB2 for connecting the capacitor Cpr in parallel to a capacitive load of a liquid crystal panel. An OFF period in which first and second output buffers are electrically disconnected from the video signal line is provided between a P period in which a positive voltage is to be applied from the first output buffer in the video signal line driving circuit to the video signal lines (capacitive load) and an N period in which a negative voltage is to be applied from the second output buffer. A first and a second precharge period are set within this OFF period.

Abstract: In a gradation voltage generation circuit used in a video signal line driving circuit for driving video signal lines of a liquid crystal display device by time division based on switching control signals, a first variable resistor circuit is connected between one terminal of a voltage divider circuit for generating a gradation voltage group and a power source line for supplying a high-level voltage, and a second variable resistor circuit is connected between the other terminal of the voltage divider circuit and a power source line for supplying a low-level voltage. The resistances of the variable resistor circuits are switched based on the switching control signal. Thus, in the periods in which the video signal lines respectively connected to R, G and B pixel formation portions are driven, gradation voltages that are adapted to the gradation reproducibility for R, G and B are outputted respectively.

Abstract: A liquid crystal panel (500) is provided with a connection switching circuit (502) for connecting a video signal line driving circuit (300) to a plurality of video signal lines (Ls). The connection switching circuit (502) includes analog switches (SWi) that correspond to the video signal lines (Ls) and one side of each of the analog switches (SWi) is connected to one of the video signal lines (Ls). The video signal lines (Ls) are grouped together into groups of two video signal lines (Ls) that are spaced apart by one video signal line. The groups of video signal lines (Ls) respectively correspond to output terminals (TSj) of the video signal line driving circuit (300). The other sides of the analog switches (SWi) connected to the video signal lines (Ls) of the same group are connected to one another, and connected to one output terminal (TSj).