JP2019040021A - Display device, television receiver, and display device manufacturing method - Google Patents

Abstract

To improve display quality.SOLUTION: A liquid crystal display device 10 includes: a liquid crystal panel 11 formed by arranging pixel parts PX presenting different colors in matrix; a display driving unit 22 which includes bright pixel parts HPX having relatively high luminance and dark pixel parts LPX having relatively low luminance in the pixel parts PX, and which executes display driving by use of average grayscale between display grayscale of the bright pixel parts HPX and display grayscale of the dark pixel parts LPX; a storage unit 23 which stores multiple kinds of arrangement patterns of the bright pixel parts HPX and the dark pixel parts LPX in the pixel parts PX; and a pattern setting unit 24 for configuring settings to allow an arrangement pattern selected from the arrangement patterns stored in the storage unit 23 to be used in display driving executed by the display driving unit 22.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a display device, a television receiver, and a method for manufacturing the display device.

  As an example of a conventional liquid crystal display device, one described in Patent Document 1 below is known. The liquid crystal display device described in Patent Document 1 includes a drive circuit having a function of correcting disconnection of a source bus line by providing a spare line. The voltage correction unit provided in the drive circuit has a high impedance and a buffer that outputs the source signal to each source bus line based on the drive signal from the sample and hold circuit with an output corresponding to the applied bias voltage. One of a comparator that detects the source bus wiring and outputs a detection signal, a latch circuit that latches the detection signal at a predetermined timing, and a high bias voltage or a low bias voltage based on the latch signal from the latch circuit A switch for applying one to the buffer.

JP-A-8-185144

  In the liquid crystal display device described in Patent Document 1 described above, the voltage value of the signal voltage applied to the source bus wiring that has become high impedance due to the disconnection correction is corrected. On the other hand, in recent years, a plurality of pixel portions arranged in a matrix form include a bright pixel portion having a relatively high luminance and a dark pixel portion having a relatively low luminance. There is a case where a driving method for correcting the viewing angle is performed by performing display using an average gradation of the gray scale and the display gradation of the dark pixel portion. In this case, if the disconnection of the source bus wiring to which the bright pixel portion and the dark pixel portion are connected is corrected, even if the technique described in Patent Document 1 described above is used, the light is supplied to the bright pixel portion and the dark pixel portion. It is difficult to appropriately correct the voltage value of the signal voltage, and there is a concern that the display quality is deteriorated.

  The present invention has been completed based on the above circumstances, and an object thereof is to improve display quality.

  The display device according to the present invention includes a display member in which a plurality of pixel portions having different colors are arranged in a matrix, a plurality of the pixel portions, a bright pixel portion having a relatively high luminance, and a relatively low luminance. A dark pixel portion, and a display driver that performs display driving using an average gray level of the display gray level of the bright pixel portion and the display gray level of the dark pixel portion, and the plurality of pixel portions A storage unit that stores a plurality of types of arrangement patterns of the bright pixel unit and the dark pixel unit in the display unit, and the display driving unit selected from the plurality of types of the arrangement patterns stored in the storage unit. And a pattern setting unit for making settings to be used for display driving.

  In this way, when display driving is performed by the display driving unit, the display member includes a plurality of pixel units arranged in a matrix, a bright pixel unit having a relatively high luminance, and a relatively low luminance. A dark pixel portion, and display using an average gradation of the display gradation of the bright pixel portion and the display gradation of the dark pixel portion is performed. The display driving unit is set to use a specific arrangement pattern for display driving from among a plurality of types of arrangement patterns stored in the storage unit by the pattern setting unit. For example, the specific pixel unit is caused by a failure or the like. Thus, even when it is difficult to perform original gradation display, the pixel portion can be made inconspicuous. Thereby, the display quality is improved.

  According to the present invention, display quality can be improved.

1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention. Schematic cross-sectional view of a liquid crystal panel constituting a liquid crystal display device included in a television receiver The top view which shows the wiring structure in the display area of the array board | substrate which comprises a liquid crystal panel Plan view schematically showing wiring configuration on array substrate Sectional view showing relationship between source wiring and spare wiring in array substrate Block diagram showing the relationship of the configuration related to the display drive of the liquid crystal panel It is a top view which shows the pixel arrangement | sequence in the display area of CF board | substrate, Comprising: The top view showing a 1st linear arrangement pattern It is a top view which shows the pixel arrangement | sequence in the display area of CF board | substrate, Comprising: The top view showing a 2nd linear arrangement | positioning pattern It is a top view which shows the pixel arrangement | sequence in the display area of CF board | substrate, Comprising: The top view showing a 1st staggered arrangement pattern It is a top view which shows the pixel arrangement | sequence in the display area of CF board | substrate, Comprising: The top view showing a 2nd staggered arrangement pattern FIG. 4 is a plan view showing a pixel arrangement in a display area of a CF substrate and showing a third staggered arrangement pattern It is a figure showing the time change of the electric potential which concerns on the image signal transmitted to the source wiring with respect to a reference electric potential, Comprising: The figure at the time of using a 1st staggered arrangement pattern It is a figure showing the time change of the electric potential which concerns on the image signal transmitted to the source wiring with respect to a reference electric potential, Comprising: The figure at the time of using the 1st linear arrangement pattern or the 2nd linear arrangement pattern The top view which shows the wiring structure in the display area of the array board | substrate which comprises the liquid crystal panel which concerns on Embodiment 2 of this invention. FIG. 5 is a plan view showing a pixel arrangement in a display area of a CF substrate, and showing a fourth staggered arrangement pattern

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the liquid crystal display device 10 is illustrated. In addition, a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing. Moreover, the upper side shown in FIG. 2 etc. is made into the front side, and the lower side of the figure is made into the back side.

  As shown in FIG. 1, a television receiver 10TV according to this embodiment includes a liquid crystal display device 10 having a horizontally long and substantially square shape, and both front and back cabinets 10C1 and 10C2 that are accommodated so as to sandwich the liquid crystal display device 10. , A power source 10P, a tuner (reception unit) 10T that receives a television signal, and a stand 10S. As shown in FIG. 2, the liquid crystal display device 10 includes a liquid crystal panel (display panel) 11 that displays an image, and a backlight device (illumination device) that supplies light for display to the liquid crystal panel 11. These are integrally held by a frame-like bezel (not shown with the backlight device). The backlight device is disposed on the back side (back side) with respect to the liquid crystal panel 11 and imparts an optical action to a light source (such as an LED) that emits white light (white light) or light from the light source. An optical member that converts to planar light is included.

  Next, the liquid crystal panel 11 will be described. As shown in FIG. 2, the liquid crystal panel 11 is interposed between a pair of glass substrates 11A and 11B that are substantially transparent and have excellent translucency, and both the substrates 11A and 11B. A liquid crystal layer 11C containing liquid crystal molecules (liquid crystal material), which is a substance that changes, and extending along the circumferential direction so as to seal the periphery of the liquid crystal layer 11C, and the thickness of both substrates 11A and 11B is the thickness of the liquid crystal layer 11C. And a seal portion (not shown) to be bonded together while maintaining a minute gap. The liquid crystal panel 11 has a display area (active area) AA that is configured by a central portion of the screen and displays an image, and a frame shape (frame shape) that is configured by an outer peripheral portion of the screen and surrounds the display area AA. In addition, it is divided into a non-display area (non-active area) NAA in which no image is displayed (see FIG. 4). The liquid crystal panel 11 can display an image on the display area AA using light supplied from the backlight device, and the front side is the light output side. In addition, the polarizing plate 12 is affixed on the outer surface side of both board | substrates 11A and 11B, respectively.

  Of both the substrates 11A and 11B constituting the liquid crystal panel 11, the front side (front side) is the CF substrate 11A, and the back side (back side) is the array substrate 11B. On the inner surface side of the display area AA in the array substrate 11B (the liquid crystal layer 11C side and the surface facing the CF substrate 11A), as shown in FIGS. 2 and 3, TFTs (Thin Film Transistors) as switching elements are provided. A large number of display elements) 13 and pixel electrodes 14 are provided side by side in a matrix (matrix), and a gate wiring (scanning wiring) 15 and a source wiring that form a lattice form around the TFT 13 and the pixel electrode 14. (Signal wiring, data wiring) 16 is disposed so as to surround. The gate wiring 15 extends substantially linearly along the X-axis direction (row direction) and transmits a scanning signal, whereas the source wiring 16 extends substantially linearly along the Y-axis direction (column direction). The image signal is transmitted. The gate wiring 15 is composed of the first metal film M1 relatively disposed on the lower layer side, while the source wiring 16 is disposed relatively on the upper layer side and is an insulating film between the first metal film M1. It consists of the second metal film M2 with IN interposed (see FIG. 5). This prevents a short circuit between the gate line 15 and the source line 16 that intersect each other. The gate line 15 is connected to the gate electrode of the TFT 13, the source line 16 is connected to the source electrode of the TFT 13, and the pixel electrode 14 is connected to the drain electrode of the TFT 13. The TFT 13 is driven when a scanning signal is supplied from the gate wiring 15, and supplies the image signal supplied to the source wiring 16 to the pixel electrode 14, thereby charging the pixel electrode 14 to a potential based on the image signal. To do. The pixel electrode 14 is disposed in a rectangular region surrounded by the gate wiring 15 and the source wiring 16 and is made of a transparent electrode film such as ITO (Indium Tin Oxide) or ZnO (Zinc Oxide). . As described above, a large number of pixel electrodes 14 are arranged side by side along the X-axis direction and the Y-axis direction. Of these, a large number of pixel electrodes 14 are arranged linearly along the Y-axis direction. The common source line 16 is connected via the TFT 13. Therefore, the group of pixel electrodes 14 forming a column along the Y-axis direction receives the image signal from the common source line 16.

  On the other hand, on the inner surface side of the display area AA of the CF substrate 11A, as shown in FIGS. 2 and 3, a large number of color filters 17 are provided at positions facing the pixel electrodes 14 on the array substrate 11B side. They are arranged in a matrix. The color filters 17 are arranged in red, green, and blue (R, G, B) colors that are repeatedly arranged in a predetermined order. Each color filter 17 selectively transmits light in a specific wavelength range related to each color. That is, the red color filter (red color filter) 17 emits light in the red wavelength region, the green color filter (green color filter) 17 transmits light in the green wavelength region, and the blue color filter (blue color filter). ) 17 selectively transmits light in the blue wavelength region. Between each color filter 17, a lattice-shaped light shielding layer (black matrix) 18 for preventing color mixture is formed. The light shielding layer 18 is arranged so as to overlap with the above-described gate wiring 15 and source wiring 16 in a plan view. On the surface of the color filter 17 and the light shielding layer 18, a solid counter electrode 19 is provided to face the pixel electrode 14 on the array substrate 11B side. The counter electrode 19 is always kept at a constant reference potential. An alignment film 20 for aligning liquid crystal molecules contained in the liquid crystal layer 11C is formed on the inner surfaces of both the substrates 11A and 11B.

  In the liquid crystal panel 11, as shown in FIG. 2, the color filter 17 and the pixel electrode 14 facing the color filter 17 constitute a pixel portion PX. The pixel unit PX exhibits a display color corresponding to the color exhibited by the color filter 17. Specifically, a red pixel portion (red pixel portion) PX that has a red color filter 17 has a red display color, and a green pixel that has a green color filter 17 has a green display color. A pixel portion (green pixel portion) PX having a blue color filter 17 is a blue pixel portion (blue pixel portion) PX having a blue display color. 2 to 7, the red color filter 17 and the pixel portion PX are “R”, the green color filter 17 and the pixel portion PX are “G”, the blue color filter 17 and The pixel portion PX is indicated by “B”. Each of the red, green, and blue pixel portions PX is repeatedly arranged along the X-axis direction (row direction), and those of the same color are continuously arranged along the Y-axis direction (column direction). (See FIGS. 7 to 11). Thereby, in the liquid crystal panel 11, a large number of pixel portions PX having different colors are arranged in a matrix. In the liquid crystal panel 11, display pixels capable of color display with a predetermined gradation are configured by the pixel portions PX of red, green, and blue adjacent to each other along the Y-axis direction. Each pixel electrode 14 constituting each color pixel portion PX is charged to a potential based on an image signal supplied from the source wiring 16 by driving the connected TFT 13, and the potential difference between the potential and the reference potential of the counter electrode 19 is set. Based on this, the alignment state of the liquid crystal layer 11C in the pixel portion PX of each color changes, so that the transmitted light amount, that is, the display gradation of the liquid crystal panel 11 is individually controlled for each pixel portion PX of each color. Each gate wiring 15 and each source wiring 16 connected to each TFT 13 are connected to a display substrate 22 provided on a control substrate (not shown together with the flexible substrate) via a flexible substrate connected to an end of the array substrate 11B. A scanning signal and an image signal are supplied (see FIG. 6). The display drive unit 22 supplies each source line 16 with an image signal of 256 gradations having a gradation value of, for example, 0 to 255 according to the display gradation of each pixel unit PX.

  Here, specific display driving in the liquid crystal panel 11 will be described. The display drive unit 22 included in the control board includes a plurality of pixel units PX including a relatively bright (bright) bright pixel unit HPX and a relatively low brightness (dark) dark pixel unit LPX. The display is driven as described above (see FIGS. 7 to 11). Specifically, the display drive unit 22 directly adjoins two pixel units PX of the same color adjacent to each other via the pixel unit PX of another color in the X-axis direction among the plurality of pixel units PX or the Y-axis direction. One of the two pixel portions PX of the same color is a bright pixel portion HPX, and the other is a dark pixel portion LPX. The display driving unit 22 performs display driving so that the average gradation of the display gradation of the bright pixel part HPX and the display gradation of the dark pixel part LPX becomes the target display gradation. As a result, the luminance (brightness) perceived by the user is equalized regardless of the angle at which the user views the display surface of the liquid crystal panel 11, thereby correcting the viewing angle. be able to. The display driving unit 22 performs inversion driving that periodically inverts the polarity of the image signal for each pixel unit PX, thereby preventing deterioration of the liquid crystal layer 11C.

  Incidentally, as shown in FIG. 4, the array substrate 11B constituting the liquid crystal panel 11 according to the present embodiment is provided with a spare wiring 21 for repairing the disconnection when the source wiring 16 is disconnected. The spare wiring 21 is arranged in the non-display area NAA in the array substrate 11B, and is routed around the display area AA. Specifically, the spare wiring 21 is made of the same first metal film M1 as the gate wiring 15 and has a pair of first wiring portions 21A extending substantially linearly along the X-axis direction and generally along the Y-axis direction. A second wiring portion 21B that extends in a straight line and has both end portions connected to the pair of first wiring portions 21A. Among these, as shown in FIGS. 4 and 5, the pair of first wiring portions 21 </ b> A intersects both end side portions 16 </ b> E extending to the non-display area NAA among the source wirings 16. The two ends 16E overlap with the insulating film IN. The pair of first wiring portions 21 </ b> A are arranged so as to cross both end portions 16 </ b> E in all the source wirings 16. When the disconnection occurs in the source wiring 16, laser beams are respectively applied to the overlapping portions of the both end portions 16 E of the source wiring 16 where the disconnection has occurred and the pair of first wiring portions 21 A in the spare wiring 21. Irradiation destroys the insulating film IN. As a result, the both ends 16E in the source wiring 16 where the disconnection has occurred and the pair of first wiring portions 21A in the spare wiring 21 are short-circuited. Here, since the image signal is supplied to the source wiring 16 from one end side portion 16E (for example, the lower end side portion 16E shown in FIG. 4) of the both end side portions 16E, the disconnection portion and the one side An image signal is normally supplied from the source wiring 16 without passing through the spare wiring 21 to the pixel electrode 14 constituting the pixel portion PX disposed between the end portion 16E and the other end portion 16E. An image signal is supplied to the pixel electrode 14 constituting the pixel portion PX disposed between the end portion 16E and the end portion 16E via the spare wiring 21. Therefore, the pixel electrode 14 constituting the pixel portion PX to which the image signal is supplied via the spare wiring 21 is compared with the pixel electrode 14 constituting the pixel portion PX to which the image signal is supplied without going through the spare wiring 21. As a result, the supplied image signal is likely to become dull, and the original gradation display may be difficult without being charged to the original potential. In particular, in the present embodiment, since the display driving unit 22 performs display driving so that the plurality of pixel units PX include the bright pixel unit HPX and the dark pixel unit LPX, an image signal supplied to each pixel unit PX. Therefore, the gradation display of the pixel portion PX to which the image signal is supplied via the spare wiring 21 tends to be different from the original. In FIG. 4, the disconnection location of the source wiring 16 is indicated by “x”, and the short-circuit location between the source wiring 16 and the spare wiring 21 is indicated by “●”.

  Therefore, as shown in FIG. 6, the liquid crystal display device 10 according to the present embodiment performs display driving that uses the average gradation of the display gradation of the bright pixel portion HPX and the display gradation of the dark pixel portion LPX. The drive unit 22, a storage unit 23 that stores a plurality of types of arrangement patterns of the bright pixel unit HPX and the dark pixel unit LPX in the plurality of pixel units PX, and a plurality of types of arrangement patterns stored in the storage unit 23 are selected. A pattern setting unit 24 for performing settings for using the arrangement pattern for display driving by the display driving unit 22. The display drive unit 22, the storage unit 23, and the pattern setting unit 24 are all provided on the control board described above. The pattern setting unit 24 is operated by an operator during the manufacturing process of the liquid crystal display device 10.

  The arrangement patterns stored in the storage unit 23 include the five types of arrangement patterns shown in FIGS. 7 to 11, high-density lines (oblique lines, vertical lines, and horizontal lines) are put in the bright pixel portion HPX, and low-density lines are put in the dark pixel portion LPX, and the positive / negative of each pixel portion PX is added. Polarity is indicated by “+” and “−”. 7 and 8 each show a linear arrangement pattern (vertical stripe arrangement pattern) in which a plurality of bright pixel portions HPX and dark pixel portions LPX are arranged linearly along the Y-axis direction. Among these, FIG. 7 represents a first linear arrangement pattern (linear arrangement pattern, first vertical stripe arrangement pattern) in which the bright pixel portions HPX and the dark pixel portions LPX are alternately arranged one by one in the X-axis direction. Represents a second linear arrangement pattern (linear arrangement pattern, second vertical stripe arrangement pattern) in which the bright pixel portions HPX and the dark pixel portions LPX are alternately arranged two by two in the X-axis direction. 9 to 11 each show a staggered arrangement pattern in which a plurality of bright pixel portions HPX and dark pixel portions LPX are arranged in a staggered manner. 9 shows a first staggered arrangement pattern (staggered arrangement pattern) in which the bright pixel portions HPX and the dark pixel portions LPX are alternately arranged one by one in the X-axis direction, and FIG. 10 shows the bright pixel portions HPX and the dark pixel portions LPX. The pixel part LPX represents a second staggered arrangement pattern (staggered arrangement pattern) alternately arranged two by two in the X-axis direction, and FIG. 11 shows three bright pixel parts HPX and three dark pixel parts LPX alternately in the X-axis direction. This represents a third staggered arrangement pattern (staggered arrangement pattern, checkered arrangement pattern). In each of these five types of arrangement patterns, the pixel portions PX arranged along the Y-axis direction have the same polarity. That is, in this embodiment, the display driving unit 22 performs column inversion driving regardless of which arrangement pattern is set by the pattern setting unit 24. In the arrangement patterns shown in FIGS. 7, 9, and 11, the polarities of the four pixel portions PX adjacent in the X-axis direction are in the order of “+ −− +”, and the arrangement patterns shown in FIGS. In the pattern, the polarities of the four pixel portions PX adjacent in the X-axis direction are in the order of “+ − + −”.

  Then, as shown in FIG. 6, the display driving unit 22 performs display driving using the arrangement pattern set by the pattern setting unit 24. Therefore, if an appropriate arrangement pattern is set by the pattern setting unit 24, the display driving unit 22 It becomes possible to make the pixel portion PX connected to the source wiring 16 that has been repaired using the wiring 21 inconspicuous. Specifically, in the liquid crystal panel 11 according to the present embodiment, the common source wiring 16 is connected to a large number of pixel portions PX (pixel electrodes 14) arranged linearly along the Y-axis direction, as described above. ing. When the repair using the spare wiring 21 is performed in the manufacturing process of the liquid crystal panel 11 having such a configuration, FIG. 7 or FIG. 8 shows the five types of arrangement patterns stored in the storage unit 23. It is preferable that any one of the linear arrangement patterns is selected and set by the pattern setting unit 24. Here, what is the image signal transmitted to the source wiring 16 when the first staggered arrangement pattern shown in FIG. 9 is selected and when the linear arrangement pattern shown in FIG. 7 or 8 is selected. It will be described with reference to FIGS. 12 and 13 are diagrams showing how the potential relating to the image signal transmitted to the source wiring 16 with respect to the reference potential of the counter electrode 19 changes for each unit display period. The upper side is positive (+) and the lower side is negative (-). 12 and 13, the potential related to the positive image signal is indicated by a solid line, and the potential related to the negative image signal is indicated by a two-dot chain line.

  First, when the first staggered arrangement pattern shown in FIG. 9 is set by the pattern setting unit 24 so as to be used for display driving of the display driving unit 22, as shown in FIG. The signal and the image signal having a relatively low potential are alternately transmitted to the source line 16 every unit display period. That is, when the first staggered arrangement pattern is used, a voltage fluctuation occurs in the image signal transmitted to the source wiring 16. For this reason, when a plurality of pixel portions PX arranged in a straight line along the column direction include an image signal that is supplied via the spare wiring 21 along with the disconnection repair using the spare wiring 21. The pixel portion PX may be difficult to perform original gradation display due to the influence of the voltage fluctuation generated in the image signal. On the other hand, when the pattern setting unit 24 sets the first linear arrangement pattern or the second linear arrangement pattern shown in FIG. 7 or 8 to be used for display driving of the display driving unit 22, As shown in FIG. 13, either a relatively high potential image signal or a relatively low potential image signal is always transmitted to the source wiring 16. That is, when the first linear arrangement pattern or the second linear arrangement pattern is used, voltage fluctuation hardly occurs in the image signal transmitted to the source wiring 16. Therefore, even if a plurality of pixel portions PX arranged in a straight line along the column direction include an image signal supplied via the spare wiring 21 along with the disconnection repair using the spare wiring 21, Since the pixel portion PX is less likely to cause voltage fluctuations in the image signal, gradation display that is relatively close to the original gradation display can be performed. As a result, the pixel portion PX to which the image signal is supplied via the spare wiring 21 in connection with the disconnection repair can be made inconspicuous, and the display quality is improved.

  The present embodiment has the structure as described above. Next, a method for manufacturing the liquid crystal display device 10 will be described. The manufacturing method of the liquid crystal display device 10 according to the present embodiment includes a liquid crystal panel manufacturing process (display member manufacturing process) for manufacturing the liquid crystal panel 11, a display drive unit 22, a storage unit 23, a pattern setting unit 24, and the like. A mounting process for mounting the image, an inspection process for displaying the inspection image on the liquid crystal panel 11 to inspect the display gradation of the plurality of pixel portions PX, and a setting for using a specific arrangement pattern for display driving by the display driving unit 22 Pattern setting step performed by the pattern setting unit 24. Furthermore, the manufacturing method of the liquid crystal display device 10 includes a repair process performed between the inspection process and the pattern setting process. In addition to the above-described steps, the method for manufacturing the liquid crystal display device 10 includes, for example, a backlight assembling step for assembling the backlight device to the liquid crystal panel 11.

  In the liquid crystal panel manufacturing process, the display area AA, the source wiring 16, the spare wiring 21, and the like are provided on the liquid crystal panel 11 using a known photolithography method or the like. In the inspection process, an inspection image is displayed on the liquid crystal panel 11 while irradiating light from the inspection backlight device, and the operator visually inspects the inspection image to check whether or not the source wiring 16 is disconnected. Yes. A repair process is performed on the liquid crystal panel 11 in which the source wiring 16 disconnected in the inspection process is found. In the repair process, a laser beam is irradiated to the overlapping portion between the both end portions 16E of the source wiring 16 where the disconnection has occurred and the first wiring portion 21A of the spare wiring 21, so that the insulating film IN interposed therebetween is formed. Destroy (see FIGS. 4 and 5). As a result, the overlapping portions of both ends 16E of the source wiring 16 where the disconnection has occurred and the first wiring portion 21A of the spare wiring 21 are short-circuited. For the liquid crystal panel 11 in which the source wiring 16 disconnected in the inspection process is not found, the repair process is skipped and the pattern setting process is performed.

  In the pattern setting process, the display driving unit 22 that performs display driving of the liquid crystal panel 11 that has been repaired using the spare wiring 21 through the repairing process is specified from the five types of arrangement patterns stored in the storage unit 23. Is set so that the selected arrangement pattern is used (see FIG. 6). In the present embodiment, the operator is made to select and set the first linear arrangement pattern or the second linear arrangement pattern shown in FIG. 7 or FIG. Therefore, even when the pixel portion PX that is difficult to perform the original gradation display due to the repair of the disconnection of the source wiring 16 is generated, the bright pixel portion HPX and the dark pixel portion LPX are moved in the Y-axis direction by the pattern setting portion 24. By setting the first linear arrangement pattern or the second linear arrangement pattern arranged linearly along the line (see FIG. 7 or FIG. 8), the light arranged linearly along the Y-axis direction is set. The image signal having the same polarity is supplied from the same source line 16 to the pixel unit HPX and voltage fluctuation is less likely to occur, and the same polarity is applied from the same source line 16 to the dark pixel unit LPX arranged linearly along the Y-axis direction. The image signal is supplied and voltage fluctuation is less likely to occur (see FIG. 13). As a result, the pixel portion PX that performs display with a display gradation different from the original is not conspicuous, and the display quality is improved. On the other hand, with respect to the liquid crystal panel 11 in which the source wiring 16 disconnected in the inspection process is not found, the pattern setting process shows, for example, from FIG. 9 to FIG. 11 among the five types of arrangement patterns stored in the storage unit 23. Any one of the staggered arrangement patterns is selected, and settings for using the selected staggered arrangement pattern are performed. In this way, compared with the case where the first linear arrangement pattern or the second linear arrangement pattern is selected, the linear display unevenness along the Y-axis direction becomes difficult to be visually recognized, so the sense of resolution is excellent. It will be a thing.

  As described above, the liquid crystal display device (display device) 10 according to this embodiment includes the liquid crystal panel (display member) 11 in which a plurality of pixel portions PX having different colors are arranged in a matrix and the plurality of pixel portions PX. Includes a bright pixel portion HPX having a relatively high luminance and a dark pixel portion LPX having a relatively low luminance, and the display gradation of the bright pixel portion HPX and the display gradation of the dark pixel portion LPX. The display driving unit 22 that performs display driving using the average gradation, the storage unit 23 that stores a plurality of types of arrangement patterns of the bright pixel unit HPX and the dark pixel unit LPX in the plurality of pixel units PX, and the storage unit 23 A pattern setting unit 24 for performing settings for using the arrangement pattern selected from the plurality of types of arrangement patterns for display driving by the display driving unit 22.

  In this way, when display driving by the display driving unit 22 is performed, the liquid crystal panel 11 has a relatively high brightness bright pixel unit HPX and a plurality of pixel units PX arranged in a matrix. The low-brightness dark pixel portion LPX is included, and display is performed using an average gradation of the display gradation of the bright pixel portion HPX and the display gradation of the dark pixel portion LPX. The display driving unit 22 is set to use a specific arrangement pattern for display driving from among a plurality of types of arrangement patterns stored in the storage unit 23 by the pattern setting unit 24. For example, the specific pixel unit PX Even when it is difficult to perform original gradation display due to a failure or the like, the pixel portion PX can be made inconspicuous. Thereby, the display quality is improved.

  In addition, the liquid crystal panel 11 is connected to the plurality of pixel portions PX while extending along the column direction in the display area AA in which the plurality of pixel portions PX are arranged, and supplies image signals thereto. The source wiring (signal wiring) 16 to be routed and the first wiring portion (partially) 21A are routed so as to bypass the display area AA and overlap with both end portions 16E of the source wiring 16 via the insulating film IN. Spare wiring 21 to be provided. In this way, an image signal is supplied to the plurality of pixel portions PX arranged in the display area AA through the connected source line 16. When the source wiring 16 is disconnected, it is between the first wiring portion 21A of the spare wiring 21 routed around the display area AA and the end portions 16E of the disconnected source wiring 16. The intervening insulating film IN is destroyed and these are short-circuited. Then, an image signal can be supplied to the plurality of pixel portions PX connected to the source line 16 via the spare line 21. On the other hand, the pixel portion PX to which the image signal is supplied via the spare wiring 21 is more likely to be dull in the supplied image signal than the pixel portion PX to which the image signal is supplied without passing through the spare wiring 21. Therefore, the original gradation display may be difficult. In this regard, the display driving unit 22 is set to use a specific arrangement pattern for display driving from among a plurality of types of arrangement patterns stored in the storage unit 23 by the pattern setting unit 24. Even if a pixel portion PX that is difficult to perform original gradation display due to the disconnection repair is generated, the pixel portion PX can be made inconspicuous.

  Further, the liquid crystal panel 11 includes a source wiring 16 that is connected to a plurality of pixel portions PX that extend along the column direction and are linearly arranged along the column direction, and supplies these image signals. The unit 23 stores the plurality of types of arrangement patterns so as to include a linear arrangement pattern in which the bright pixel portion HPX and the dark pixel portion LPX are arranged linearly along the column direction. In this way, an image signal is supplied to the plurality of pixel portions PX arranged in a straight line along the column direction by the connected source wiring 16. Here, even when a pixel portion PX that is difficult to perform original gradation display due to, for example, repair of the disconnection of the source wiring 16 or the like occurs, the display driving unit 22 is stored in the storage unit 23 by the pattern setting unit 24. If it is set to use a linear arrangement pattern in which the bright pixel portion HPX and the dark pixel portion LPX are arranged linearly along the column direction from among the plurality of types of arrangement patterns thus formed, it is linear. An image signal is supplied from the same source line 16 to the bright pixel portion HPX arranged, and voltage fluctuation is less likely to occur, and an image signal is supplied from the same source line 16 to the dark pixel portion LPX arranged in a straight line. Fluctuation is less likely to occur. Thereby, it is possible to make the pixel portion PX, which is difficult to perform the original gradation display, inconspicuous.

  The television receiver 10TV according to the present embodiment includes the liquid crystal display device 10 described above. According to such a television receiver 10TV, since the display quality of the liquid crystal display device 10 is excellent, it is possible to realize display of a television image with excellent display quality.

  Moreover, the manufacturing method of the liquid crystal display device 10 according to the present embodiment includes a liquid crystal panel manufacturing process (display member manufacturing process) for manufacturing the liquid crystal panel 11 in which a plurality of pixel portions PX having different colors are arranged in a matrix. The plurality of pixel portions PX include a bright pixel portion HPX having a relatively high luminance and a dark pixel portion LPX having a relatively low luminance. The display gradation of the bright pixel portion HPX and the display gradation of the dark pixel portion LPX A display driving unit 22 that performs display driving using an average gray level, a storage unit 23 that stores a plurality of types of arrangement patterns of bright pixel units HPX and dark pixel units LPX in the plurality of pixel units PX, and a storage unit 23. A mounting process for mounting a pattern setting unit 24 for performing settings for using a layout pattern selected from a plurality of stored layout patterns for display driving by the display driving unit 22, and inspecting the liquid crystal panel 11 An inspection process for displaying an image and inspecting display gradations of a plurality of pixel units PX, and an arrangement pattern selected from a plurality of types of arrangement patterns stored in the storage unit 23 based on an inspection result of the inspection process And a pattern setting step in which the pattern setting unit 24 performs settings to be used for display driving by the display driving unit 22.

  In this way, in the inspection process performed after the liquid crystal panel manufacturing process and the mounting process, the inspection image is displayed on the liquid crystal panel 11, and the plurality of pixel portions PX arranged in a matrix based on the inspection image are displayed. The display gradation is inspected. In the subsequent pattern setting process, an arrangement pattern selected from a plurality of types of arrangement patterns stored in the storage unit 23 based on the inspection result of the inspection process is used for display driving by the display driving unit 22. Setting is performed by the pattern setting unit 24. Therefore, even when the plurality of pixel portions PX in the inspection result include the pixel portion PX that displays a display gradation different from the original one, the pattern setting unit 24 can set an appropriate arrangement pattern. The pixel portion PX that performs display with a display gradation different from the original can be made inconspicuous. Thereby, the display quality is improved.

  Moreover, in the manufacturing method of the liquid crystal display device 10 described above, in the liquid crystal panel manufacturing process, the liquid crystal panel 11 includes a display area AA in which a plurality of pixel portions PX are arranged, and the display area AA extends along the column direction. However, the source wiring 16 connected to the plurality of pixel portions PX and supplies image signals thereto, and the first wiring portion 21A is routed around the display area AA so that the first wiring portion 21A is at both ends 16E. And the spare wiring 21 that overlaps with the insulating film IN are provided. In the inspection process, the source wiring 16 is inspected for disconnection, and the disconnection is performed between the inspection process and the pattern setting process. This includes a repairing step of destroying the insulating film IN interposed between the overlapping portions of the both end portions 16E of the source wiring 16 and the first wiring portion 21A of the spare wiring 21 and short-circuiting them. In this way, when the source wiring 16 in which the disconnection has occurred in the inspection process is found, both end portions 16E of the source wiring 16 in which the disconnection has occurred in the repair process and the first wiring portion of the spare wiring 21 are detected. The insulating film IN interposed between the overlapping portions with 21A is destroyed to short-circuit them. Then, an image signal can be supplied to the plurality of pixel portions PX connected to the source line 16 via the spare line 21. On the other hand, the pixel portion PX to which the image signal is supplied via the spare wiring 21 is more likely to be dull in the supplied image signal than the pixel portion PX to which the image signal is supplied without passing through the spare wiring 21. Therefore, the original gradation display may be difficult. Therefore, in the pattern setting step, the setting for using the arrangement pattern selected from a plurality of types of arrangement patterns stored in the storage unit 23 based on the inspection result in the inspection step for display driving by the display driving unit 22 is set as a pattern. Since setting is performed by the setting unit 24, even if a pixel portion PX that is difficult to perform original gradation display due to the repair of the disconnection of the source wiring 16 occurs, the pixel portion PX is made inconspicuous. it can.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIG. In the second embodiment, a method in which a method of connecting the source wiring 116 to the pixel electrode 114 is changed is shown. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

  As shown in FIG. 14, the source wiring 116 according to the present embodiment is connected to a plurality of pixel portions PX extending in the Y-axis direction and arranged in a staggered manner. Specifically, among a large number of pixel electrodes 114 (pixel portions PX) arranged in a matrix along the X-axis direction and the Y-axis direction, the pixel electrodes 114 in two columns adjacent to each other in the X-axis direction with the source wiring 116 interposed therebetween are arranged. The plurality of pixel electrodes 114 that are included and arranged in a staggered manner are connected to a common source wiring 116 via the TFT 113, and are supplied with an image signal from the common source wiring 116.

  On the other hand, in the present embodiment, the storage unit (see FIG. 6), which is not illustrated, has the fourth staggered arrangement pattern shown in FIG. 15 in addition to the five types of arrangement patterns described in the first embodiment. (Staggered arrangement pattern, dot inversion arrangement pattern) is stored. FIG. 15 shows a fourth staggered arrangement pattern which is a kind of staggered arrangement pattern. The fourth staggered arrangement pattern is similar to the first staggered arrangement pattern, although the bright pixel portions HPX and the dark pixel portions LPX are alternately arranged one by one in the X-axis direction, but each pixel adjacent in the X-axis direction and the Y-axis direction. The polarities of the parts PX are reversed. In the fourth staggered arrangement pattern, the polarities of the four pixel portions PX adjacent to each other in the X-axis direction and the Y-axis direction are in the order of “+ − + −”.

  In the pattern setting process included in the manufacturing method of the liquid crystal display device having such a configuration, the display driving unit that performs display driving of the liquid crystal panel that has been repaired using the spare wiring through the repairing process is stored in the storage unit. The fourth staggered arrangement pattern shown in FIG. 15 is selected from the six types of arrangement patterns, and settings are made to use the selected fourth staggered arrangement pattern. Therefore, even when the pixel portion PX which is difficult to perform the original gradation display due to the disconnection repair of the source wiring 116 is generated, the bright pixel portion HPX and the dark pixel portion LPX are arranged in a staggered pattern by the pattern setting portion. By setting the fourth staggered arrangement pattern, image signals having the same polarity are supplied from the same source wiring 116 to the bright pixel portions HPX arranged in a staggered pattern, so that voltage fluctuations are less likely to occur, and the staggered arrangement is performed. An image signal having the same polarity is supplied to the dark pixel portion LPX that is supplied from the same source wiring 116, so that voltage fluctuation is less likely to occur (see FIG. 13). As a result, the pixel portion PX that performs display with a display gradation different from the original becomes inconspicuous, and the display quality is improved.

  As described above, according to the present embodiment, the liquid crystal panel includes the source wiring 116 connected to the plurality of pixel portions PX extending in the column direction and arranged in a staggered pattern to supply image signals thereto. The storage unit stores a plurality of types of arrangement patterns so as to include a staggered arrangement pattern in which the bright pixel portions HPX and the dark pixel portions LPX are arranged in a staggered manner. In this way, the image signal is supplied to the plurality of pixel portions PX arranged in a staggered pattern by the connected source wiring 116. Here, even when the pixel portion PX that is difficult to perform the original gradation display due to, for example, repair of the disconnection of the source wiring 116 occurs, the display driving unit may include a plurality of display driving units stored in the storage unit by the pattern setting unit. If the staggered arrangement pattern in which the bright pixel portion HPX and the dark pixel portion LPX are arranged in a staggered pattern among the types of arrangement patterns is set to be used for display driving, the same as the bright pixel portion HPX arranged in a staggered manner The image signal is supplied from the source wiring 116 and voltage fluctuation is less likely to occur, and the image signal is supplied from the same source wiring 116 to the dark pixel portions LPX arranged in a staggered pattern, and voltage fluctuation is less likely to occur (see FIG. 13). reference). Thereby, it is possible to make the pixel portion PX, which is difficult to perform the original gradation display, inconspicuous.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In addition to the above-described embodiments, the specific contents of the arrangement pattern stored in the storage unit can be changed as appropriate. Specifically, the arrangement pattern includes an arrangement relating to the bright pixel portion and the dark pixel portion and an arrangement relating to the polarity of the pixel portion, and these arrangements can be changed as appropriate. Regarding the former, for example, it is also possible to take an arrangement pattern in which the bright pixel portion and the dark pixel portion are arranged in a straight line along the X-axis direction. Regarding the latter, for example, the polarities of the four pixel portions adjacent to each other in the X-axis direction in each arrangement pattern shown in FIGS. 7, 9, and 11 are in the order of “+ − + −”. In each arrangement pattern shown in FIG. 10, the polarities of the four pixel portions adjacent in the X-axis direction can be set in the order of “+ −− +”.
(2) In each of the above-described embodiments, the liquid crystal panel constituting the liquid crystal display device has spare wiring, and the method for manufacturing the liquid crystal display device includes a repair process using the spare wiring. May not have spare wiring, and the manufacturing method of the liquid crystal display device may not include a repair process. Depending on the configuration of the liquid crystal panel, the charge rate of the pixel electrode due to the image signal originally supplied from the source wiring may not be good, and in a liquid crystal display device including such a liquid crystal panel, the pattern included in the manufacturing method In the setting process, a specific arrangement pattern is selected from a plurality of types of arrangement patterns according to the connection mode of the source wiring to the pixel electrode (pixel unit), and the selected arrangement pattern is used for display driving by the display driving unit. The setting may be made by the pattern setting unit so that it is used.
(3) In addition to the above embodiments, the specific connection mode of the source wiring to the pixel electrode (pixel portion) in the liquid crystal panel can be changed as appropriate.
(4) In each of the above-described embodiments, the display drive unit, the storage unit, and the pattern setting unit are all provided on the control board. However, any or all of these are provided on components other than the control board. It does not matter.
(5) In each of the embodiments described above, the liquid crystal panel and the chassis are illustrated in a vertically placed state in which the short side direction coincides with the vertical direction. However, the liquid crystal panel and the chassis have the long side direction in the vertical direction. Those that are in a vertically placed state matched with are also included in the present invention.
(6) In each of the embodiments described above, a TFT is used as a switching element of a liquid crystal display device. However, the present invention can also be applied to a liquid crystal display device using a switching element other than TFT (for example, a thin film diode (TFD)). In addition to the liquid crystal display device for display, the present invention can also be applied to a liquid crystal display device for monochrome display.
(7) In each of the above-described embodiments, the transmissive liquid crystal display device is exemplified. However, the present invention can be applied to a reflective liquid crystal display device and a transflective liquid crystal display device.
(8) In each of the above-described embodiments, the liquid crystal display device using a liquid crystal panel as the display panel has been exemplified. However, the present invention can also be applied to a display device using another type of display panel.
(9) In each of the above-described embodiments, the television receiver provided with the tuner has been exemplified. However, the present invention can also be applied to a display device that does not include the tuner. Specifically, the present invention can also be applied to a liquid crystal display device used as an electronic signboard (digital signage) or an electronic blackboard.

  DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device (display device), 10TV ... Television receiver, 11 ... Liquid crystal panel (display member), 16, 116 ... Source wiring (signal wiring), 16E ... End side part, 21 ... Reserve wiring, 21A ... No. 1 wiring part (one part at a time), 22 ... display drive part, 23 ... storage part, 24 ... pattern setting part, AA ... display area, HPX ... bright pixel part, IN ... insulating film, LPX ... dark pixel part, PX ... Pixel part

Claims (7)

A display member formed by arranging a plurality of pixel portions exhibiting different colors in a matrix;
The plurality of pixel units include a relatively high-brightness bright pixel unit and a relatively low-brightness dark pixel unit, and the display gradation of the bright pixel unit and the display level of the dark pixel unit A display driving unit that performs display driving using an average gradation with a tone;
A storage unit that stores a plurality of types of arrangement patterns of the bright pixel unit and the dark pixel unit in the plurality of pixel units;
And a pattern setting unit configured to perform setting for using the arrangement pattern selected from the plurality of types of arrangement patterns stored in the storage unit for display driving by the display driving unit.   The display member includes a display area in which a plurality of the pixel portions are arranged, and a signal wiring that extends along the column direction in the display area and is connected to the plurality of pixel portions and supplies image signals thereto. 2. The display device according to claim 1, further comprising: spare wiring that is routed around the display area and partially overlaps with both end portions of the signal wiring via an insulating film. The display member includes a signal wiring that extends along the column direction and is connected to the plurality of pixel portions arranged in a straight line along the column direction to supply these image signals.
The said memory | storage part memorize | stores so that the said bright pixel part and the said dark pixel part may contain the linear arrangement pattern arrange | positioned linearly along the said column direction in several types of said arrangement patterns. 2. The display device according to 2. The display member includes a signal wiring connected to the plurality of pixel portions arranged in a staggered manner while extending along the column direction and supplying image signals thereto.
The display device according to claim 1, wherein the storage unit stores a plurality of types of arrangement patterns so as to include a staggered arrangement pattern in which the bright pixel units and the dark pixel units are arranged in a staggered manner.   A television receiver comprising the display device according to any one of claims 1 to 4. A display member manufacturing process for manufacturing a display member formed by arranging a plurality of pixel portions exhibiting different colors in a matrix; and
A plurality of the pixel portions include a bright pixel portion having a relatively high luminance and a dark pixel portion having a relatively low luminance, and an average of a display gradation of the bright pixel portion and a display gradation of the dark pixel portion A display drive unit that performs display drive using gradation, a storage unit that stores a plurality of types of arrangement patterns of the bright pixel unit and the dark pixel unit in the plurality of pixel units, and a plurality of types stored in the storage unit A mounting step of mounting a pattern setting unit for performing settings for using the arrangement pattern selected from among the arrangement patterns for display driving by the display driving unit;
An inspection step of displaying an inspection image on the display member and inspecting display gradations of the plurality of pixel portions;
The pattern setting unit is configured to use the arrangement pattern selected from the plurality of types of arrangement patterns stored in the storage unit based on the inspection result of the inspection process for display driving by the display driving unit. A pattern setting step to be performed. In the display member manufacturing step, the display member is connected to the display region in which the plurality of pixel portions are arranged, and the display region is connected to the plurality of pixel portions while extending in the column direction in the display region. A signal wiring that supplies an image signal, and a spare wiring that is routed in a form that bypasses the display area and that partially overlaps both end portions of the signal wiring via an insulating film;
In the inspection process, the signal wiring is inspected for disconnection,
Breaking the insulating film interposed between the overlapping portions of the both ends of the signal wiring and a part of the spare wiring, which were performed between the inspection process and the pattern setting process The manufacturing method of the display apparatus of Claim 6 including the repair process which short-circuits these.

Images