JP5957289B2 - Display device - Google Patents

Description

  The present invention relates to a display device such as a liquid crystal display device.

  A liquid crystal display device, which is a typical display device, generally requires a lighting unit on the opposite side of the display surface of the liquid crystal panel, that is, the back side, because the liquid crystal panel itself that displays an image does not emit light. The illumination unit irradiates light toward a liquid crystal panel that is an object to be irradiated, so that the liquid crystal display device can display an image on the screen. Thus, the illumination part arrange | positioned on the back side of the display surface of a liquid crystal panel is called the backlight unit, for example.

  A conventional display device including a backlight unit as an illumination unit is disclosed in Patent Document 1. In this conventional display device, the luminance distribution of the planar light irradiated on the display unit can be adjusted. As a result, attempts are being made to improve the image quality while reducing the power consumption of the display device.

JP 2007-34251 A

  However, the conventional display device described in Patent Document 1 does not take into consideration that the luminance distribution is adjusted in accordance with the individual viewer, the age, sex, and the like of the viewer. As a result, there has been a problem that the screen of the display device does not have the luminance distribution desired by the viewer, or is not an appropriate luminance distribution corresponding to the age of the viewer.

  The present invention has been made in view of the above points, and can automatically adjust the luminance distribution of the screen corresponding to the individual viewer of the display device, and can set the luminance suitable for the individual viewer for viewing. It is an object of the present invention to provide a display device that can be used.

  In order to solve the above problems, a display device of the present invention includes a display unit that displays an image, a lighting unit that includes a plurality of light sources arranged in a planar shape and irradiates the display unit with planar light, and A storage unit that stores a plurality of luminance gradient filters in which the luminance distribution in the plane of the planar light is adjusted in advance, an imaging unit that captures images of individual viewers in a direction in which the display unit displays an image, Based on the viewer information specified by the viewer information specifying unit, the viewer information specifying unit for specifying viewer information including the viewer's individual and the age and sex of the viewer from the image taken by the imaging unit, A luminance setting unit that selects the luminance gradient filter corresponding to the viewer information from the storage unit; and a luminance correction unit that corrects the luminance distribution of the planar light using the luminance gradient filter selected by the luminance setting unit; Characterized by comprising It is.

  According to this configuration, the display device stores a plurality of luminance gradient filters in which the luminance distribution of the planar light of the illumination unit is adjusted in advance. And a display apparatus correct | amends the brightness | luminance of the planar light of an illumination part using the brightness | luminance gradient filter corresponding to a viewer individual. Therefore, the display device automatically adjusts the luminance distribution of the screen in correspondence with the individual viewer.

  Further, in the display device having the above-described configuration, the storage unit stores in advance an associated face image of the viewer and the luminance gradient filter desired by the viewer, and the luminance setting unit is stored in the viewer information specifying unit. When the face image obtained as the specified viewer information matches the face image stored in the storage unit, the brightness gradient filter desired by the viewer is selected from the storage unit.

  According to this configuration, the display device corrects the luminance of the planar light of the illumination unit using the desired luminance gradient filter corresponding to the individual viewer. Accordingly, the display device is automatically adjusted to the luminance distribution of the screen desired by the individual viewer.

  In the display device configured as described above, the luminance setting unit selects the corresponding luminance gradient filter from the storage unit as the viewer information based on a viewer's age.

  According to this configuration, the display device corrects the luminance of the planar light of the illumination unit by using the luminance gradient filter configured corresponding to the age of the viewer. Therefore, the display device is automatically adjusted to the luminance distribution of the screen corresponding to the age group of the viewer.

  In the display device having the above-described configuration, the luminance setting unit selects the corresponding luminance gradient filter from the storage unit based on the gender of the viewer as the viewer information.

  According to this configuration, the display device corrects the luminance of the planar light of the illumination unit using the luminance gradient filter configured corresponding to the gender of the viewer. Accordingly, the display device is automatically adjusted to the luminance distribution of the screen corresponding to the gender of the viewer.

  In the display device having the above configuration, the brightness setting unit includes a content specifying unit that acquires advertising information from the image displayed by the display unit and specifies a target layer of a viewer for the advertisement based on the advertising information. Is characterized in that the corresponding brightness gradient filter is selected from the storage unit based on the viewer information specified by the viewer information specifying unit and the target layer specified by the content specifying unit.

  According to this configuration, the display device corrects the luminance of the planar light of the illumination unit using the luminance gradient filter configured to correspond to the viewer's age and gender and the target layer of the viewer with respect to the advertisement. . Therefore, when displaying the advertisement, the display device automatically adjusts the luminance distribution of the screen corresponding to the viewer corresponding to the target layer of the advertisement.

  Further, the present invention is a display device in which a plurality of the display devices are arranged side by side and configured as a single unit, and a connected image can be displayed, wherein the storage unit includes a quantity of the plurality of display devices, Configuration information including orientation and arrangement is stored in advance, and the luminance setting unit responds based on the viewer information specified by the viewer information specifying unit and the configuration information on the plurality of display devices. The luminance gradient filter is selected from the storage unit.

  According to this configuration, in addition to the viewer information, the display device uses the luminance gradient filter configured to correspond to the number, orientation, and arrangement of the plurality of display devices to reduce the luminance of the planar light of the illumination unit. to correct. Therefore, even in a so-called multi-display device composed of a plurality of display devices, the brightness distribution of the screen corresponding to the viewer is automatically adjusted.

  According to the configuration of the present invention, the display device stores a plurality of luminance gradient filters in which the luminance distribution of the planar light of the illumination unit is adjusted in advance, and uses the luminance gradient filter corresponding to the individual viewer to use the planar shape of the illumination unit. Correct the brightness of the light. Accordingly, it is possible to automatically adjust the luminance distribution of the screen corresponding to the individual viewer, and it is possible to provide a display device capable of setting and viewing the luminance suitable for the individual viewer.

1 is an exploded perspective view of a display device according to a first embodiment of the present invention. It is a block diagram which shows the structure of the display apparatus of 1st Embodiment of this invention. It is a schematic front view which shows the luminance distribution of the planar light which the illumination part of the display apparatus of 1st Embodiment of this invention irradiates. It is explanatory drawing which shows an example of the relationship between the viewer of the display apparatus of 1st Embodiment of this invention, and luminance distribution. It is a block diagram which shows the structure of the display apparatus of 2nd Embodiment of this invention. It is explanatory drawing which shows an example of the relationship between the viewer and luminance distribution of the display apparatus of 2nd Embodiment of this invention. It is a schematic front view which shows the luminance distribution of the planar light which the illumination part of the display apparatus of 3rd Embodiment of this invention irradiates. It is a block diagram which shows the structure of the display apparatus of 3rd Embodiment of this invention. It is a schematic front view showing the luminance distribution of the planar light irradiated by the illuminating unit of the display device of the third embodiment of the present invention, and shows a uniform in-plane state with reduced power. It is a schematic front view which shows the luminance distribution of the planar light which the illumination part of the display apparatus of 4th Embodiment of this invention irradiates. It is a schematic front view showing the luminance distribution of the planar light irradiated by the illumination unit of the display device according to the fourth embodiment of the present invention, and shows a uniform in-plane state with reduced power.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, a liquid crystal display device will be described as an example of the display device of the present invention.

  First, the structure of the liquid crystal display device according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an exploded perspective view of a liquid crystal display device. In addition, the upper side of FIG. 1 is the display surface side of the liquid crystal panel mentioned later.

  The liquid crystal display device 1 is a display device that uses liquid crystal to display an image, and has a substantially rectangular shape in a plan view that extends longer in the horizontal direction than in the vertical direction. As shown in FIG. 1, the liquid crystal display device 1 includes a liquid crystal panel 10 as a display unit and a backlight unit 20 as an illumination unit. The liquid crystal panel 10 and the backlight unit 20 are accommodated and supported in the case 2.

  The liquid crystal panel 10 includes an active matrix substrate 11, a color filter substrate 12, and a deflection plate 13. The color filter substrate 12 may be simply called a counter substrate.

  The active matrix substrate 11 is disposed to face the color filter substrate 12 disposed on the display surface side of the liquid crystal panel 10. The active matrix substrate 11 is provided with a switching element, a pixel electrode, and a common electrode made of TFT (Thin Film Transistor) (not shown) on a predetermined surface. The pixel electrode and the common electrode are composed of, for example, a pair of comb-shaped electrodes.

  Furthermore, each of the active matrix substrate 11 and the color filter substrate 12 is covered with an alignment film (not shown) capable of aligning liquid crystals in a specific direction.

  The active matrix substrate 11 and the color filter substrate 12 are bonded to each other with a seal material (not shown) so that their predetermined surfaces face each other. Further, the liquid crystal is sandwiched between the active matrix substrate 11 and the color filter substrate 12 and sealed in a space surrounded by a sealing material.

  The deflection plate 13 is affixed to each of the surfaces opposite to the predetermined surfaces of the active matrix substrate 11 and the color filter substrate 12 enclosing the liquid crystal. The deflection plate 13 is a sheet that transmits only a light wave in a specific vibration direction, and is attached in a state where the transmission axis directions of the two deflection plates 13 are shifted from each other by about 90 °.

  The liquid crystal panel 10 having such a configuration adjusts the orientation of the liquid crystal by an electric field generated between the pixel electrode and the common electrode of the active matrix substrate 11 based on the image signal, and adjusts the transmittance of light transmitted through the liquid crystal layer. change. The liquid crystal panel 10 employs, for example, the above-described lateral electric field method, and generates an electric field in parallel to the main surface of the active matrix substrate 11 so that liquid crystal molecules are aligned in a plane parallel to the main surface of the substrate. Rotate with

  The backlight unit 20 is an apparatus for generating backlight light (planar light) for the liquid crystal panel 10, and is an illumination unit that employs, for example, a direct type as an illumination method. The backlight unit 20 is disposed on the back side (downward in FIG. 1) of the liquid crystal panel 10. The backlight unit 20 includes an LED module 21, a diffusion plate 22, a prism sheet 23, and a lens sheet 24.

  The LED module 21 is a device that emits light for generating backlight light, and is disposed below the liquid crystal panel 10 in FIG. 1. The LED module 21 includes a plate-like substrate 25 having a substantially rectangular shape in plan view, and a plurality of LEDs 26 as light sources.

  The LEDs 26 are configured by, for example, white LEDs (Light Emitting Diodes) that emit white light, and a plurality of LEDs 26 are arranged side by side in a substantially grid-like row on one surface of the substrate 25. The surface of the substrate 25 is divided into a plurality of areas 25a arranged vertically and horizontally, and is configured so that at least one LED 26 is included in one area 25a. In the present embodiment, the LED module 21 includes, for example, a total of 144 areas 25a (16 in the horizontal direction × 9 in the vertical direction) (see FIGS. 1 and 3).

  The light source is not limited to the LED, and the LED itself is not limited to one that emits white light. For example, the LED 26 may be configured as an LED unit in which LED chips that emit light having wavelengths of red (R), green (G), and blue (B) are gathered. Furthermore, you may add the LED chip which radiate | emits the light of the wavelength of yellow (Y) to these. Further, the number and arrangement method of the LEDs 26 are not limited to the previously described contents and the shape shown in FIG.

  The diffusion plate 22, the prism sheet 23, and the lens sheet 24 are arranged to face the LED module 21 above the LED module 21 in FIG. 1 so as to cover the LED module 21 from the liquid crystal panel 10 side.

  Of these diffusion plate 22, prism sheet 23 and lens sheet 24, the diffusion plate 22 is disposed closest to the LED module 21 and directly receives light emitted from the LED module 21. The diffusing plate 22 is disposed such that the surface to be irradiated with light emitted from the LED module 21 faces the surface of the substrate 25 where the LED 26 is disposed in substantially parallel. The diffusion plate 22 receives and diffuses the light emitted from the LED 26 and spreads the light over the entire area of the liquid crystal panel 10.

  The prism sheet 23 is provided so as to overlap the liquid crystal panel 10 side of the diffusion plate 22. In the prism sheet 23, for example, triangular prisms extending linearly in one direction are arranged in a direction intersecting in one direction within the sheet surface. The prism sheet 23 deflects the radiation characteristic of light from the diffusion plate 22.

  The lens sheet 24 is provided so as to overlap the prism sheet 23 on the liquid crystal panel 10 side. In the lens sheet 24, fine particles that refract and scatter light are dispersed inside. The lens sheet 24 suppresses the difference in brightness that causes unevenness in the amount of light without locally condensing from the prism sheet 23.

  The backlight unit 20 having such a configuration illuminates the back surface of the liquid crystal panel 10 by irradiating the surface with substantially uniform backlight light in which unevenness is suppressed. Since the liquid crystal panel 10 changes the transmittance of the backlight that transmits the liquid crystal based on the image signal, a desired image is displayed on the display screen of the liquid crystal panel 10.

  Next, a detailed configuration of the liquid crystal display device 1 will be described with reference to FIG. 2 in addition to FIG. FIG. 2 is a block diagram showing a configuration of the liquid crystal display device 1.

  The liquid crystal display device 1 includes image signal acquisition unit 3, image signal processing unit 30, liquid crystal panel control unit 4, liquid crystal driver 5, LED control unit 40, LED driver 6, and temperature sensor 71 shown in FIG. And a luminance sensor 72.

  The image signal acquisition unit 3 includes an external input interface that acquires an image signal transmitted by an image signal output unit (not shown). The image signal acquisition unit 3 transmits the acquired image signal to the image signal processing unit 30. Note that the image signal is an LCD signal for specifying a display image transmitted to the liquid crystal panel control unit 4 after being subjected to signal processing by the image signal processing unit 30, and the brightness of the screen transmitted to the LED control unit 40. LED signal to be specified is included.

  The image signal processing unit 30 receives an image signal from the image signal acquisition unit 3. Based on the received image signal, the image signal processing unit 30 sets an LCD signal for specifying a display image by setting the light transmittance of each pixel of the liquid crystal panel 10 and the light emission luminance of each LED 26 of the backlight unit 20. To generate an LED signal for specifying the brightness of the screen. Then, the image signal processing unit 30 transmits the LCD signal to the liquid crystal panel control unit 4 and transmits the LED signal to the LED control unit 40. The other detailed configuration of the image signal processing unit 30 will be described later.

  The liquid crystal panel control unit 4 receives the LCD signal from the image signal processing unit 30. The liquid crystal panel control unit 4 generates an LCD control signal for driving the liquid crystal driver 5 based on the received LCD signal, and transmits the LCD control signal to the liquid crystal driver 5. The liquid crystal driver 5 switches the state of the switching element of each pixel of the liquid crystal panel 10 based on the LCD control signal received from the liquid crystal panel control unit 4.

  The LED control unit 40 includes a serial / parallel conversion unit (S / P conversion unit) 41, a pulse width modulation unit 42, an individual variation correction unit 43, a temperature correction unit 44, a temporal deterioration correction unit 45, a luminance correction unit 46, and a parallel / serial conversion unit. (P / S converter) 47 and a memory 50 are provided.

  The S / P converter 41 receives the LED signal from the image signal processor 30. Note that the LED signal may include luminance information (APL (Average Picture Level) value) of an image included in the image signal. When the APL value is included in the LED signal, the LED control unit 40 can generate an LED control signal reflecting the luminance information of the image signal.

  The S / P converter 41 converts the LED signal received as a serial signal into a parallel signal. The pulse width modulation unit 42 generates a PWM (Pulse Width Modulation) value based on the LED signal.

  The individual variation correcting unit 43 performs PWM value correction based on the individual performance of the LED 26 that has been confirmed in advance in order to eliminate the individual error of the LED 26. The individual performance of the LED 26 is confirmed as follows. First, the PWM value is reset so that the LED 26 emits white light having a desired color when each LED chip constituting the LED 26 is lit at a predetermined PWM value. Thereafter, the plurality of LEDs 26 are turned on, and the PWM value is corrected for each area 25a so that uneven brightness as planar light does not occur. In this way, it is possible to generate a PWM value in which individual errors of the LED 26 such as individual variations in luminance and luminance unevenness of planar light are corrected.

  Various other methods exist as such a correction processing method. Generally, a correction processing method using a look-up table (LUT) is employed. In other words, the individual variation correction unit 43 performs correction processing with reference to the individual variation correction LUT 51 stored in the memory 50.

  Here, the memory 50 includes various look-up tables (individual variation correction LUT 51) used in each correction unit (individual variation correction unit 43, temperature correction unit 44, aging deterioration correction unit 45, and luminance correction unit 46) of the LED control unit 40. , Temperature correction LUT 52, aging deterioration correction LUT 53, and luminance correction LUT 54). Each of these LUTs is referred to by the corresponding correction unit as necessary.

  The temperature correction unit 44 corrects the decrease in luminance of the LED 26 due to the temperature increase caused by the light emission of the LED 26. For example, the temperature correction unit 44 receives the temperature information from the temperature sensor 71 that measures the temperature of the LED 26. Then, the temperature correction unit 44 refers to the temperature correction LUT 52 based on the temperature information, and corrects the PWM value for the LED 26 in each area 25a. In this manner, the temperature correction unit 44 corrects the luminance decrease of the LED 26 caused by the temperature increase. The reception of temperature information from the temperature sensor 71 may be executed at a predetermined frequency (for example, once per second).

  The temporal deterioration correction unit 45 performs correction of a decrease in luminance of the LED 26 due to the temporal deterioration of the LED 26. For example, when the accumulated lighting time of the LED 26 reaches a predetermined time (for example, every 5000 hours), the temporal deterioration correction unit 45 receives the luminance information from the luminance sensor 72 that measures the luminance of the LED 26. Then, the temporal deterioration correction unit 45 refers to the temporal deterioration correction LUT 53 based on the luminance information, and corrects the PWM value for the LED 26 in each area 25a. In this manner, the temporal deterioration correction unit 45 corrects the luminance decrease of the LED 26 caused by the temporal deterioration.

  The luminance correction unit 46 can correct the PWM value so that the luminance of the peripheral portion of the planar light from the backlight unit 20 is lowered to a level that cannot be recognized by human eyes with respect to the luminance of the central portion. By reducing the luminance of the peripheral edge of the planar light in this way, it is possible to suppress the power consumption of the LED 26 without lowering the display quality of the image (without causing luminance unevenness).

  For example, the luminance correction unit 46 corrects the PWM value for the LED 26 in each area 25 a with reference to the luminance correction LUT 54. The luminance correction LUT 54 includes correction information corresponding to the areas 25a of the LED modules 21 arranged in a total of 144 in the horizontal direction 16 × vertical direction 9 pieces. As this correction information, the luminance correction LUT 54 stores a plurality of luminance gradient filters 54a. Details of the luminance correction processing related to the luminance gradient filter 54a will be described later.

  The P / S converter 47 converts the LED signal (including the PWM value) that has been subjected to the correction process, which is a parallel signal, into the LED control signal (including the PWM control signal) that is a serial signal. The LED control signal includes a PWM value given to each area 25a of the LED module 21 and a reference current value. The P / S conversion unit 47 transmits this LED control signal to the LED driver 6. The LED driver 6 executes light emission control (PWM control) of each LED 26 of the LED module 21 based on the LED control signal received from the P / S conversion unit 47.

  Next, details of the luminance correction of the planar light that the backlight unit 20 irradiates the liquid crystal panel 10 will be described with reference to FIGS. 3 and 4 in addition to FIGS. FIG. 3 is a schematic front view showing the luminance distribution of the planar light irradiated by the backlight unit 20, and FIG. 4 is an explanatory diagram showing an example of the relationship between the viewer of the liquid crystal display device 1 and the luminance distribution. Note that the luminance distributions shown in FIGS. 3 and 4 are drawn in association with the structure of the backlight unit 20, and the difference in luminance is drawn stronger than the level of luminance that can be recognized originally. Hereinafter, in the same drawing, a difference in luminance is drawn in the same manner.

  In consideration of visual characteristics, the backlight unit 20 can irradiate planar light with a bright central portion (high luminance) and a dark peripheral portion (low luminance) as shown in FIG. 3, for example. Further, the backlight unit 20 can also irradiate planar light having a uniform luminance within the surface.

  Such a luminance distribution of the planar light of the backlight unit 20 can be realized by the luminance correction unit 46 executing the luminance correction processing using the luminance gradient filter 54a. The luminance gradient filter 54a includes correction information corresponding to the areas 25a of the LED modules 21 arranged in a total of 144 in the horizontal direction 16 × vertical direction 9 pieces. The luminance correction LUT 54 stores a plurality of luminance gradient filters 54a in which the luminance distribution in the plane of the planar light of the backlight unit 20 is adjusted in advance.

  Then, the liquid crystal display device 1 corrects the luminance of the planar light of the backlight unit 20 using the luminance gradient filter 54a corresponding to the individual viewer selected from the luminance correction LUT 54. For this reason, the liquid crystal display device 1 includes a camera 73 as an imaging unit, a memory 74, and an LED parameter setting LUT 75 as shown in FIG. The image signal processing unit 30 includes a viewer information specifying unit 31 and an LED parameter setting unit 32 that is a luminance setting unit. Further, the viewer information specifying unit 31 includes a face detecting unit 33 and a face information specifying unit 34.

  The camera 73 is arranged so that the liquid crystal panel 10 is directed in a direction to display an image, and takes an image of the individual viewer. The camera 73 transmits the captured image data of the individual viewer to the viewer information specifying unit 31.

  In the viewer information specifying unit 31, the face detection unit 33 receives the viewer's individual image data captured by the camera 73. The face detection unit 33 detects face part information from individual viewer image data. Then, the face detection unit 33 transmits the detected information of the individual face portion of the viewer to the face information specifying unit 34.

  The face information specifying unit 34 specifies the viewer information with reference to data stored in advance in the memory 74 based on the information of the individual face portion of the viewer detected by the face detecting unit 33. The memory 74 stores viewer information including age and gender associated with the characteristics of the human face portion. Further, the memory 74 stores information on the face portion of a specific viewer as viewer information. As a result, the face information specifying unit 34 specifies the viewer information such as the age and sex of the viewer and whether or not it is a specific individual.

  The LED parameter setting unit 32 selects the luminance gradient filter 54a corresponding to the viewer information based on the viewer information specified by the face information specifying unit 34. As described above, the luminance gradient filter 54a may store the luminance correction LUT 54 as its storage unit in advance, or may store the LED parameter setting LUT 75 as its storage unit in advance. FIG. 4 shows an example of the relationship between the viewer of the liquid crystal display device 1 and the luminance distribution.

According to FIG. 4, for example, for viewer A, a luminance gradient that realizes a luminance distribution of planar light with normal power and uniform in plane (for example, power 150 [W], central luminance 300 [cd / m ² ]). The filter 54a is stored in advance as the luminance gradient filter 54a desired by the viewer A.

Further, for example, for the viewer B, the luminance gradient filter 54a that realizes the luminance distribution of the planar light with the electric power suppressed and the central portion relatively bright (for example, electric power 120 [W], central luminance 300 [cd / m ² ]). Is stored in advance as the desired brightness gradient filter 54a.

For example, for the viewer C, a luminance gradient filter 54a that realizes a luminance distribution of planar light with a normal power and a considerably bright central portion (for example, electric power 150 [W], central luminance 700 [cd / m ² ]). It is stored in advance as the desired brightness gradient filter 54a of the viewer C.

In addition, for example, the luminance gradient filter 54a that realizes the luminance distribution of planar light with a considerably low power and uniform in-plane (for example, electric power 90 [W], central luminance 180 [cd / m ² ]) for all children is provided. Is stored in advance as a luminance gradient filter 54a corresponding to.

A luminance gradient filter 54a that realizes a luminance distribution of planar light with a reduced power and a uniform in-plane (for example, power 120 [W], central luminance 240 [cd / m ² ]) for viewers other than the above is provided. The brightness gradient filter 54a corresponding to a general viewer is stored in advance.

  For example, according to FIG. 4, the viewer information specifying unit 31 stores viewer A, viewer B, viewer C, general children, and other viewer information based on the individual image data captured by the camera 73. Identify. The LED parameter setting unit 32 selects the luminance gradient filter 54a corresponding to the viewer information based on the viewer information specified by the viewer information specifying unit 31. The brightness correction unit 46 corrects the brightness distribution of the planar light of the backlight unit 20 using the brightness gradient filter 54a selected in this way.

  As described above, the liquid crystal display device 1 includes the camera 73 that captures an individual image of the viewer, the viewer information specifying unit 31 that specifies viewer information from the image, and the corresponding luminance gradient based on the viewer information. The LED parameter setting unit 32 that selects the filter 54a from the storage unit, and the luminance correction unit 46 that corrects the luminance distribution of the planar light using the luminance gradient filter 54a. Accordingly, the liquid crystal display device 1 stores a plurality of luminance gradient filters 54a in which the luminance distribution of the planar light of the backlight unit 20 is adjusted in advance, and the luminance of the planar light using the luminance gradient filter 54a corresponding to the individual viewer. Correct. Therefore, the liquid crystal display device 1 can automatically adjust the luminance distribution of the screen corresponding to the individual viewer.

  For example, even if one of the viewers changes the setting of the luminance distribution of the planar light of the backlight unit 20, the liquid crystal display device 1 automatically determines the current viewer from the camera image. It is possible to view with the image quality corresponding to the viewer without reusing the troublesome setting. It should be noted that a plurality of brightness gradient filters 54a desired by individual viewers may be stored for each viewing time zone and viewing position.

  Even with the same display device and the same power consumption, the central luminance differs by changing the luminance distribution of the planar light of the backlight unit 20. Therefore, by selecting the luminance gradient filter 54a corresponding to the viewer as described above, the image quality performance can be characterized.

  On the other hand, even with the same display device and the same central luminance, the power consumption differs by changing the luminance distribution of the planar light of the backlight unit 20. Therefore, the energy-saving performance can be characterized by selecting the luminance gradient filter 54a corresponding to the viewer as described above.

  The viewer can arbitrarily select which of the image quality performance and the energy saving performance is prioritized by setting the brightness gradient filter 54a in advance. Then, the liquid crystal display device 1 automatically determines the current viewer from the camera image and adjusts the luminance distribution of the planar light of the backlight unit 20.

  In addition, a storage unit such as the brightness correction LUT 54 or the LED parameter setting LUT 75 stores the face image of the individual viewer in association with the brightness gradient filter 54a desired by the viewer, and the LED parameter setting unit 32 specifies the viewer information. When the face image obtained as the viewer information specified by the unit 31 matches the face image stored in the storage unit, the brightness gradient filter 54a desired by the viewer is selected from the storage unit. Thereby, the liquid crystal display device 1 corrects the luminance of the planar light of the backlight unit 20 by using the desired luminance gradient filter 54a corresponding to the individual viewer. Therefore, the liquid crystal display device 1 can automatically adjust the luminance distribution of the screen desired by the individual viewer.

  Further, since the LED parameter setting unit 32 selects the corresponding luminance gradient filter 54a as the viewer information based on the viewer's age from the storage unit, the liquid crystal display device 1 is configured corresponding to the viewer's age. The brightness gradient filter 54a is used to correct the brightness of the planar light of the backlight unit 20. Therefore, the liquid crystal display device 1 can automatically adjust the luminance distribution of the screen corresponding to the age group of the viewer.

  And according to the structure of the said embodiment of this invention, the liquid crystal display device 1 memorize | stores the several brightness | luminance inclination filter 54a which adjusted the brightness | luminance distribution of the planar light of the backlight unit 20 previously, and respond | corresponds to a viewer individual. The brightness gradient filter 54a is used to correct the brightness of the planar light of the backlight unit 20. Accordingly, it is possible to provide the liquid crystal display device 1 that can automatically adjust the luminance distribution of the screen corresponding to the individual viewer and can set the luminance suitable for the individual viewer and view the content. it can.

  Next, a liquid crystal display device according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a block diagram showing the configuration of the liquid crystal display device, and FIG. 6 is an explanatory diagram showing an example of the relationship between the viewer of the liquid crystal display device and the luminance distribution. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the detailed description thereof will be omitted.

  The liquid crystal display device 1 according to the second embodiment can display an advertisement as image content. Therefore, the image signal processing unit 30 of the liquid crystal display device 1 includes a content specifying unit 35 having a target specifying unit 36 as shown in FIG.

  The content specifying unit 35 acquires advertisement information from the image signal. The target specifying unit 36 specifies the target audience (for example, age and gender) of the viewer for the advertisement based on the advertisement information.

  Storage units such as the luminance correction LUT 54 and the LED parameter setting LUT 75 store in advance a luminance gradient filter 54a corresponding to the age and sex of the viewer. Then, the LED parameter setting unit 32 selects the corresponding luminance gradient filter 54a based on the viewer information specified by the face information specifying unit 34 and the target layer of the viewer for the advertisement specified by the target specifying unit 36. FIG. 6 shows an example of the relationship between the viewer of the liquid crystal display device 1 and the luminance distribution.

  Here, as shown in FIG. 6, it is assumed that the liquid crystal display device 1 displays a commercial CM as an advertisement. The target layers specified by the target specifying unit 36 are “female” and “generation to make up”.

  For example, when the viewer information specified by the face information specifying unit 34 is “male 20s”, the LED parameter setting unit 32 suppresses the power, and the luminance gradient filter 54a that realizes the luminance distribution of the planar light that is uniform in the plane. Select.

  For example, when the viewer information specified by the face information specifying unit 34 is “female 20s”, the LED parameter setting unit 32 is a luminance gradient filter that realizes a luminance distribution of planar light with normal power and a fairly bright central portion. 54a is selected.

  Further, for example, when the viewer information specified by the face information specifying unit 34 is “male 40s”, the LED parameter setting unit 32 suppresses the power and the luminance gradient filter 54a that realizes a uniform luminance distribution of planar light within the surface. Select.

  Further, for example, when the viewer information specified by the face information specifying unit 34 is “female 60s”, the LED parameter setting unit 32 suppresses power, and the luminance gradient that realizes the luminance distribution of planar light with a relatively bright central portion. The filter 54a is selected.

  For example, when the viewer information specified by the face information specifying unit 34 is “female child”, the LED parameter setting unit 32 suppresses the power considerably, and the luminance gradient filter 54a that realizes the in-plane uniform luminance distribution. Select.

  When an advertisement is displayed on the display device, it is important to make the advertisement easy to see with respect to a suitable target layer corresponding to the advertisement. On the other hand, when the viewer layer is not closely related to the target layer, it is preferable to suppress the luminance of the screen from the viewpoint of energy saving.

  According to the above configuration, since the LED parameter setting unit 32 selects the corresponding luminance gradient filter 54a as the viewer information based on the gender of the viewer from the storage unit, the liquid crystal display device 1 corresponds to the gender of the viewer. The luminance of the planar light of the backlight unit 20 is corrected using the luminance gradient filter 54a configured as described above. Therefore, the liquid crystal display device 1 can automatically adjust the luminance distribution of the screen corresponding to the gender of the viewer.

  Further, the liquid crystal display device 1 corrects the luminance of the planar light of the backlight unit 20 using the luminance gradient filter 54a configured corresponding to the viewer's age and gender and the target layer of the viewer with respect to the advertisement. can do. Therefore, when displaying the advertisement, the liquid crystal display device 1 can automatically adjust the luminance distribution of the screen corresponding to the viewer corresponding to the target layer of the advertisement.

  Such a liquid crystal display device 1 can be used as an information display for viewing by an unspecified number. And the viewer information specific | specification part 31 can specify the viewer information of several persons. When a plurality of people watch the liquid crystal display device 1 at the same time, the brightest luminance gradient filter 54a may be selected from the luminance gradient filters 54a corresponding to each of the specified plurality of viewer information.

  Further, the luminance gradient filter 54a may be changed according to the scene in the same advertisement CM. Further, a plurality of brightness gradient filters 54a corresponding to different viewing positions may be stored.

  Next, a liquid crystal display device according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a schematic front view showing a luminance distribution of planar light irradiated by the illumination unit of the liquid crystal display device, FIG. 8 is a block diagram showing the configuration of the liquid crystal display device, and FIG. 9 is a surface irradiated by the illumination unit of the liquid crystal display device. FIG. 3 is a schematic front view showing the luminance distribution of the shaped light, and shows a uniform state in the surface with reduced power. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the detailed description thereof will be omitted.

  The liquid crystal display device 1 according to the third embodiment is configured as a multi-display device capable of displaying a connected image by arranging a plurality of liquid crystal display devices side by side as shown in FIG. The liquid crystal display device 1 is configured by arranging nine horizontally long liquid crystal display devices 1A to 1K so as to be three horizontal and three vertical. Although one camera 73 is provided for the liquid crystal display device 1, nine cameras 73 may be provided corresponding to the liquid crystal display devices 1A to 1K.

  Further, the liquid crystal display device 1 stores in advance configuration information 76 including the number, orientation, and arrangement of the nine liquid crystal display devices 1A to 1K constituting the multi-display device as shown in FIG. The multi-display device configuration information 76 may be stored in, for example, the memory 74, the LED parameter setting LUT 75, the memory 50, or the like of each of the liquid crystal display devices 1A to 1K, or input to the liquid crystal display devices 1A to 1K from the outside. Anyway.

  Then, the LED parameter setting unit 32 selects the corresponding luminance gradient filter 54a based on the viewer information specified by the face information specifying unit 34 and the configuration information 76 of the multi-display device.

  7 and 9 show a luminance correction unit using the two types of luminance gradient filters 54a selected as described above in the liquid crystal display device 1 as a multi-display device including nine liquid crystal display devices 1A to 1K. Reference numeral 46 denotes a state in which the luminance distribution of the planar light of the backlight unit 20 is corrected. FIG. 7 shows the luminance distribution of planar light having a relatively light central portion with reduced power, and FIG. 9 shows the luminance distribution of planar light with uniform power in the plane.

  According to this configuration, the liquid crystal display device 1 uses the brightness gradient filter 54a configured corresponding to the number, orientation, arrangement, and the like of the nine liquid crystal display devices 1A to 1K in addition to the viewer information. The brightness of the planar light of the unit 20 is corrected. Therefore, even in a so-called multi-display device constituted by a plurality of display devices, it is possible to automatically adjust the luminance distribution of the screen corresponding to the viewer.

  Next, a liquid crystal display device according to a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a schematic front view showing the luminance distribution of the planar light emitted by the illumination unit of the display device, and FIG. 11 is a schematic front view showing the luminance distribution of the planar light emitted by the illumination unit of the display device. This shows a uniform state in the surface. Since the basic configuration of this embodiment is the same as that of the first to third embodiments described above, the same reference numerals as those in the above are attached to the same constituent elements as those of the embodiment, and Description and detailed description thereof will be omitted.

  The liquid crystal display device 1 according to the fourth embodiment is configured as a multi-display device capable of displaying connected images by arranging a plurality of liquid crystal display devices side by side as shown in FIGS. 10 and 11. Yes. The liquid crystal display device 1 is configured by arranging ten vertically long liquid crystal display devices 1A to 1L so as to be five horizontal and two vertical. Although one camera 73 is provided for the liquid crystal display device 1, ten cameras 73 may be provided corresponding to the liquid crystal display devices 1A to 1L.

  10 and 11 show the luminance distribution of the planar light of the backlight unit 20 in the liquid crystal display device 1 as a multi-display device including ten liquid crystal display devices 1A to 1L using two types of luminance gradient filters 54a. The corrected state is shown. FIG. 10 shows the luminance distribution of planar light with a relatively light central portion with reduced power, and FIG. 11 shows the luminance distribution of planar light with uniform power in the plane.

  In this way, in the liquid crystal display device 1 as a multi-display device including the ten liquid crystal display devices 1A to 1L, in addition to the viewer information, the quantity, orientation, and arrangement of the ten liquid crystal display devices 1A to 1L. The luminance of the planar light of the backlight unit 20 is corrected using the luminance gradient filter 54a configured corresponding to the above. Therefore, in a so-called multi-display device composed of a plurality of display devices, it is possible to automatically adjust the luminance distribution of the screen corresponding to the viewer.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  For example, the luminance gradient filter 54a is not limited to that used in the description of the above embodiment, and a luminance gradient filter 54a formed with another luminance distribution may be used. Further, the liquid crystal display device 1 as a multi-display device is not limited to the configurations of the third and fourth embodiments, and may be a multi-display device configured with other quantities, orientations, and arrangements.

  The present invention can be used in a display device such as a liquid crystal display device.

1 Liquid crystal display device (display device)
10 Liquid crystal panel (display unit)
20 Backlight unit (lighting unit)
30 Image signal processing unit 31 Viewer information specifying unit 32 LED parameter setting unit (luminance setting unit)
33 face detection unit 34 face information identification unit 40 LED control unit 46 luminance correction unit 50 memory 54 luminance correction LUT (storage unit)
54a Luminance gradient filter 73 Camera (imaging unit)
74 Memory 75 LED parameter setting LUT (storage unit)
76 Configuration information

Claims (5)

A display for displaying an image;
An illumination unit that includes a plurality of light sources arranged in a planar shape and irradiates the display unit with planar light; and
A storage unit that stores a plurality of luminance gradient filters in which the luminance distribution in the plane of the planar light is adjusted in advance,
An imaging unit that captures an image of a viewer individual with the display unit oriented in a direction to display an image;
A viewer information specifying unit for specifying viewer information including the individual viewer and the age and sex of the viewer from the image captured by the imaging unit;
A luminance setting unit that selects, from the storage unit, the luminance gradient filter corresponding to the viewer information based on the viewer information specified by the viewer information specifying unit;
A luminance correction unit that corrects the luminance distribution of the planar light using the luminance gradient filter selected by the luminance setting unit;
A content specifying unit that acquires advertising information from the image displayed by the display unit and specifies a target layer of a viewer for the advertisement based on the advertising information;
Equipped with a,
Said brightness setting section the viewer information the viewer information identifying unit has identified, that you select the brightness gradient filter from the storage unit corresponding to on the basis of said target layer in which the content specifying unit has identified Characteristic display device. The storage unit pre-stores the viewer's individual face image in association with the brightness gradient filter desired by the viewer,
When the face image obtained as the viewer information specified by the viewer information specifying unit matches the face image stored in the storage unit, the brightness setting unit selects the brightness gradient filter desired by the viewer. The display device according to claim 1, wherein the display device is selected from the storage unit.   The display device according to claim 1, wherein the luminance setting unit selects the corresponding luminance gradient filter as the viewer information based on a viewer's age from the storage unit.   The display device according to claim 1, wherein the luminance setting unit selects the luminance gradient filter corresponding to the viewer information based on gender of the viewer from the storage unit. A plurality of the display devices are arranged side by side and configured as a single unit, and a display device capable of displaying connected images,
The storage unit stores in advance configuration information including the number, orientation, and arrangement of the plurality of display devices,
The brightness setting unit selects the corresponding brightness gradient filter from the storage unit based on the viewer information specified by the viewer information specifying unit and the configuration information on the plurality of display devices. The display device according to any one of claims 1 to 4, wherein:

Images