WO2012090809A1 - Display device and drive method for same - Google Patents

Display device and drive method for same Download PDF

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Publication number
WO2012090809A1
WO2012090809A1 PCT/JP2011/079605 JP2011079605W WO2012090809A1 WO 2012090809 A1 WO2012090809 A1 WO 2012090809A1 JP 2011079605 W JP2011079605 W JP 2011079605W WO 2012090809 A1 WO2012090809 A1 WO 2012090809A1
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WO
WIPO (PCT)
Prior art keywords
display
display area
backlight
light
display device
Prior art date
Application number
PCT/JP2011/079605
Other languages
French (fr)
Japanese (ja)
Inventor
藤原　晃史
知洋 木村
亜希子 宮崎
敏晴 楠本
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012090809A1 publication Critical patent/WO2012090809A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133391—Constructional arrangement for sub-divided displays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133601—Illuminating devices for spatial active dimming
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0232—Special driving of display border areas
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas

Definitions

  • the present invention relates to a display device including a backlight device including a light emitting diode.
  • LEDs light-emitting diodes
  • Patent Document 1 backlight devices using light-emitting diodes (hereinafter also referred to as LEDs) which are self-luminous elements as light sources have been proposed (for example, see Patent Document 1).
  • the light emitting diode has many advantages such as long life, low power consumption, and high brightness as compared with the cold cathode tube used as a conventional light source.
  • one light emitting diode emits a red (R) light emitting diode element, a green (G) light emitting diode element, and a blue (B) light emitting diode.
  • R red
  • G green
  • B blue
  • one light emitting diode includes a light emitting diode element of any one color and emits the color.
  • FIG. 12 is a block diagram showing a schematic configuration of the backlight device of Patent Document 1.
  • a plurality of light emitting diodes 120 that respectively emit red, green, and blue light are uniformly arranged on the light emitting unit printed circuit board 150 so as to correspond to the entire surface of the display panel. ing. Thereby, since it can light-emit uniformly within the display panel surface, a uniform display can be performed.
  • JP 2006-128125 A (published May 18, 2006)
  • liquid crystal display device in which the entire display area corresponding to one display panel is divided into a plurality of areas, and a different image is displayed for each divided display area.
  • the content to be displayed is different for each display area, and the required display quality is often different for each display area.
  • an object of the present invention is to reduce power consumption in a display device that can perform display by dividing a display area into a plurality of areas.
  • a display device comprising a display panel having a plurality of display areas, and a backlight for irradiating the display panel with light,
  • the backlight is configured to have different display brightness for each display area when displaying different images for each display area.
  • the backlight is set so that the display brightness of the second display area is lower than the display brightness of the first display area.
  • the arrangement pitch of the light sources in the second display area can be configured to be wider than the arrangement pitch of the light sources in the first display area.
  • a display device driving method comprising a display panel having a plurality of display areas and a backlight for irradiating the display panel with light,
  • the backlight is configured to have different display brightness for each display area,
  • the split screen display mode and the full screen display mode are switched to each other based on a video signal input from the outside.
  • the aspect ratio (aspect ratio) of the first display area is 16: 9, the aspect ratio of the second display area is 5: 9, and the entire display including the first and second display areas is combined.
  • the aspect ratio of the area is 21: 9
  • a full HD (Full High Definition) image is displayed in the first display area without being reduced, and at the same time in the second display area.
  • Can display other contents for example, images such as time and calendar, text information associated with video in the first display area, multi-channel television video, etc.
  • the full screen display mode it is possible to display a video such as movie content having an aspect ratio of 21: 9 without reducing it.
  • the backlight is configured so that the display luminance is different for each display area when different images are displayed for each display area. Therefore, there is an effect that power consumption can be reduced in a display device that can perform display by dividing a display region into a plurality of regions.
  • FIG. (A)-(c) is a front view of the LED in which the LED chips are arranged in a GRGB array from one end to the other end.
  • FIG. (A)-(c) is a front view of the LED in which the LED chips are arranged in a GRGB array from one end to the other end.
  • FIG. (A)-(c) is a front view of the LED in which the LED chips are arranged in a GRGB array from one end to the other end.
  • It is a schematic diagram which shows the display area in the liquid crystal display panel which concerns on this Embodiment. 4 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 1.
  • FIG. 12 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 2.
  • FIG. 12 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 3.
  • FIG. 12 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 4.
  • FIG. (A) is a top view which shows schematic structure of the backlight unit which concerns on the structural example 6,
  • (b) is the side view. It is a block diagram which shows schematic structure of the conventional backlight apparatus.
  • (A) And (b) is a schematic diagram which shows the other display area in the liquid crystal display panel which concerns on this Embodiment.
  • 12 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 7.
  • FIG. 10 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 8.
  • FIG. 1 is an exploded perspective view showing a liquid crystal display device 69 according to the present embodiment. For the sake of convenience, only a relatively small number of light guide plates 43 to be described later is illustrated.
  • FIG. 2 is an exploded perspective view showing a part of the backlight unit 49 included in the liquid crystal display device 69.
  • the liquid crystal display device 69 includes a liquid crystal display panel 59, a backlight unit 49, and a housing HG (HG1 and HG2) sandwiching them.
  • liquid crystal (not shown) is composed of an active matrix substrate 51 provided with active elements such as TFT (Thin Film Transistor) (not shown) and a counter substrate 52 facing the active matrix substrate 51. ). That is, the active matrix substrate 51 and the counter substrate 52 are substrates for sandwiching liquid crystal, and are formed of transparent glass or the like.
  • a sealing material (not shown) is attached to the outer edge of the active matrix substrate 51 and the counter substrate 52, and the liquid crystal is sealed with this sealing material.
  • a polarizing film PL is provided so as to sandwich the active matrix substrate 51 and the counter substrate 52.
  • the liquid crystal display panel 59 is a non-light emitting display panel, it receives a light (backlight light) from the backlight unit 49 and exhibits a display function. Therefore, if the light from the backlight unit 49 can uniformly irradiate the entire surface of the liquid crystal display panel 59, the display quality of the liquid crystal display panel 59 is improved.
  • Such a backlight unit 49 includes an LED module MJ, a light guide plate set ST, a diffusion sheet 45, and prism sheets 46 and 47.
  • the LED module MJ is a module that emits light. As shown in FIG. 2, the LED module MJ is mounted on a mounting substrate 40 and electrodes formed on the mounting substrate surface 40U of the mounting substrate 40, and receives light to supply light. LED (Light Emitting Diode) 41 to emit.
  • the LED module MJ preferably includes a plurality of LEDs (light sources) 41, which are light emitting elements, in order to ensure the amount of light, and more preferably, the LEDs 41 are arranged in a matrix. However, in the drawing, only a part of the LEDs 41 is shown for convenience.
  • one direction in which the LEDs 41 are arranged is referred to as an X direction, and a direction intersecting (for example, orthogonal to) the X direction is referred to as a Y direction.
  • the kind of LED41 is not specifically limited.
  • one red light emitting (R) LED chip 42R, two green light emitting (G) LED chips 42G, and one blue light as shown in the front view of the LED 41 in FIG.
  • a GRGB arrangement when it arranges with LED chip 42G, LED chip 42R, LED chip 42G, and LED chip 42B from one end to the other end, it is called a GRGB arrangement.
  • the light guide plate set ST includes a light guide plate 43 and a reflection sheet 44.
  • the light guide plate 43 multi-reflects the light of the LED 41 incident thereon and emits the light to the outside. As shown in FIG. 2, the light guide plate 43 includes a light receiving piece 43R that receives light and an emission piece 43S connected to the light receiving piece 43R.
  • the light receiving piece 43R is a plate-like member and has a notch KC in a part of the side wall.
  • the notch KC has a space enough to surround the LED 41 while the light emitting surface 42L of the LED 41 faces the bottom KCb of the notch KC. Therefore, when the LED 41 is mounted so as to be accommodated in the notch KC, the bottom KCb of the notch KC becomes the light receiving surface 43Rs of the light guide plate 43.
  • the surface facing the mounting substrate 40 is a bottom surface 43Rb, and the surface opposite to the bottom surface 43Rb is the top surface 43Ru.
  • the emission pieces 43S are plate-like members that are arranged so as to line up with the light receiving pieces 43R and are located at the destination of light incident from the light receiving surface 43Rs.
  • the emitting piece 43S has a bottom surface 43Sb that is flush with the bottom surface 43Rb of the light receiving piece 43R, and has a top surface 43Su that causes a step that becomes higher than the top surface 43Ru of the light receiving piece 43R.
  • the top surface 43Su and the bottom surface 43Sb of the emission piece 43S are not parallel, and one surface is inclined with respect to the other surface. More specifically, as the light travels from the light receiving surface 43Rs, the bottom surface 43Sb is inclined so as to approach the top surface 43Su. That is, the emission piece 43S tapers by gradually reducing the thickness (the distance between the top surface 43Su and the bottom surface 43Sb) as it proceeds to the destination of the light from the light receiving surface 43Rs (note that the taper is tapered).
  • the light guide plate 43 including the emission piece 43S is also referred to as a wedge-shaped light guide plate 43).
  • the light guide plate 43 including the light receiving piece 43R and the emission piece 43S receives light from the light receiving surface 43Rs, and transmits the light to the bottom surface 43b (43Rb ⁇ 43Sb) and the top surface 43u (43Ru ⁇ 43Su). Are reflected from the top surface 43Su to the outside (light emitted from the top surface 43Su is referred to as planar light).
  • the reflection sheet 44 covers the bottom surface 43b of the light guide plate 43 and reflects the light leaking from the bottom surface 43b back to the inside of the light guide plate 43 (however, in FIG. The reflection sheet 44 is omitted).
  • the light guide plates 43 in the light guide plate set ST as described above are arranged in a matrix according to the LEDs 41.
  • the top surface 43Ru of the light receiving piece 43R supports the bottom surface 43Sb of the emission piece 43S, and the same surface is completed by the collected top surface 43Su (the top surface 43Su is Gather together.)
  • the light guide plate sets ST are arranged along the X direction, the same surface is completed with the gathered top surfaces 43Su.
  • the top surface 43Su of the light guide plate 43 is arranged in a matrix, thereby forming a relatively large light exit surface (the light guide plate 43 arranged in a matrix is also referred to as a tandem light guide plate 43).
  • the diffusion sheet 45 is positioned so as to cover the top surface 43Su of the light guide plates 43 arranged in a matrix, diffuses the planar light from the light guide plate 43, and spreads the light throughout the liquid crystal display panel 59 (note that The diffusion sheet 45 and the prism sheets 46 and 47 are collectively referred to as an optical sheet group (45 to 47)).
  • the prism sheets 46 and 47 are, for example, optical sheets that have a prism shape in the sheet surface and deflect light emission characteristics, and are positioned so as to cover the diffusion sheet 45. Therefore, the prism sheets 46 and 47 collect the light traveling from the diffusion sheet 45 and improve the luminance. Note that the divergence directions of the lights collected by the prism sheet 46 and the prism sheet 47 intersect each other.
  • the front housing HG1 and the back housing HG2, which are the housings HG, are fixed while sandwiching the above-described backlight unit 49 and the liquid crystal display panel 59 covering the backlight unit 49 (how to fix are particularly limited) is not). That is, the front housing HG1 sandwiches the backlight unit 49 and the liquid crystal display panel 59 together with the back housing HG2, thereby completing the liquid crystal display device 69.
  • the back housing HG2 accommodates the light guide plate set ST, the diffusion sheet 45, and the prism sheets 46 and 47 while being stacked in this order.
  • This stacking direction is referred to as the Z direction (Note that the X direction, the Y direction, and the Z direction may be orthogonal to each other).
  • the light from the LED 41 passes through the light guide plate set ST and is emitted as planar light, and the planar light passes through the optical sheet group (45 to 47). As a result, the light is emitted as backlight light with increased luminance. Then, the backlight light reaches the liquid crystal display panel 59, and the liquid crystal display panel 59 displays an image by the backlight light.
  • the backlight unit (tandem backlight unit) 49 on which the tandem type light guide plate 43 is mounted can irradiate the display area of the liquid crystal display panel 59 partially because the emitted light can be controlled for each light guide plate 43. it can. Therefore, such a backlight unit 49 can be said to be a local dimming backlight unit 49.
  • FIG. 4 is a block diagram showing various members included in the liquid crystal display device 69 (the LED 41 shown in FIG. 4 is one of a plurality of LEDs 41). As shown in FIG. 4, the liquid crystal display device 69 includes a receiving unit 31, a video signal processing unit (control unit) 11, a liquid crystal display panel controller 32, an LED controller 21, an LED driver 33, and an LED 41.
  • the liquid crystal display device 69 includes a receiving unit 31, a video signal processing unit (control unit) 11, a liquid crystal display panel controller 32, an LED controller 21, an LED driver 33, and an LED 41.
  • the receiving unit 31 receives a video / audio signal such as a television broadcast signal (see white arrow), for example (hereinafter, the video signal included in the video / audio signal will be mainly described). Then, the reception unit 31 transmits the received video signal to the video signal processing unit 11.
  • a video / audio signal such as a television broadcast signal (see white arrow), for example (hereinafter, the video signal included in the video / audio signal will be mainly described). Then, the reception unit 31 transmits the received video signal to the video signal processing unit 11.
  • the video signal transmitted to the video signal processing unit 11 is referred to as a basic video signal (image data) for convenience, and a signal indicating red among the color video signals (basic color video signals) included in the basic video signal.
  • the basic red video signal FRS, the green signal is the basic green video signal FGS, and the blue signal is the basic blue video signal FBS.
  • the video signal processing unit 11 includes a built-in memory 12 and a processing control unit (control unit) 13.
  • the built-in memory 12 stores a look-up table (not shown) required for signal correction processing by the processing control unit 13.
  • the process control unit 13 generates a processed video signal based on the received basic color video signal (image data). Then, the processing control unit 13 transmits the processed video signal to the liquid crystal display panel controller 32 and the LED controller 21.
  • the processed video signal is, for example, a processed color video signal (processed red video signal RS, processed green) obtained by processing a basic color video signal (basic red video signal FRS, basic green video signal FGS, basic blue video signal FBS, etc.).
  • a video signal GS, a processed blue video signal BS), and synchronization signals (clock signal CLK, vertical synchronization signal VS, horizontal synchronization signal HS, etc.) relating to the processed color video signal.
  • the processed color video signal transmitted to the liquid crystal display panel controller 32 and the processed color video signal transmitted to the LED controller 21 are different. Therefore, in order to distinguish these processed color video signals, the processed color video signals transmitted to the liquid crystal display panel controller 32 are processed panel red video signal RSp, processed green video signal GSp for panel, and processed blue video signal for panel. Let BSp.
  • the processed color video signal (light source control data) transmitted to the LED controller 21 is a light source red video signal RSd, a light source green video signal GSd, and a light source blue video signal BSd. More specifically, the light source color video signals (RSd, GSd, BSd) are transmitted to the LED controller 21 after appropriate correction processing.
  • the light source color video signals (RSd, GSd, BSd) and the panel processed color video signals (RSp, GSp, BSp) have the following relationship with respect to the basic color video signals (FRS, FGS, FBS). Meet.
  • the liquid crystal display panel controller 32 controls the pixels of the liquid crystal display panel 59 based on the processed red video signal RSp for panel, the processed green video signal GSp for panel, the processed blue video signal BSp for panel, and the synchronization signals related to these signals. To do.
  • the LED controller 21 includes an LED driver control unit 22 and a pulse width modulation unit 23.
  • the LED driver control unit 22 transmits the light source color video signal from the video signal processing unit 11 to the pulse width modulation unit 23. Further, the LED driver control unit 22 generates a lighting timing signal TS of the LED 41 (specifically, the LED chip 42) from the synchronization signals (clock signal CLK, vertical synchronization signal VS, horizontal synchronization signal HS, etc.), and the LED driver 33. Send to.
  • a lighting timing signal TS of the LED 41 specifically, the LED chip 42
  • the synchronization signals clock signal CLK, vertical synchronization signal VS, horizontal synchronization signal HS, etc.
  • the pulse width modulation unit 23 adjusts the light emission time of the LED 41 based on the color video signal for the light source in a pulse width modulation (PWM) method.
  • a signal value used for such pulse width modulation is referred to as a PWM signal (PWM value).
  • PWM value A signal value used for such pulse width modulation is referred to as a PWM signal (PWM value).
  • PWM value A signal value used for such pulse width modulation is referred to as a PWM signal (PWM value).
  • PWM value pulse width modulation method
  • the pulse width modulation method is well known. For example, the backlight is driven at 120 Hz (120 blinks per second, cycle 8.33 ms), and the period of 8.33 ms is divided into 12 bits (4096). It is a method of controlling and changing with.
  • the LED driver 33 controls lighting of the LED 41 based on a signal (PWM signal, timing signal) from the LED controller 21.
  • the LED 41 includes one LED chip 42R (for example, a first light source), two LED chips 42G (for example, a second light source), and one LED chip 42B (for example, a third light source). . These LED chips 42 are controlled to be turned on by the LED driver 33 by a pulse width modulation method.
  • the tandem backlight unit 49 in which the wedge-shaped light guide plate 43 is spread has been described as an example. However, it is not limited to this.
  • the LED 41R, LED 41G, LED 41G, and LED 41B which are light sources, gather to generate white light in a mixed color and directly to the optical sheet group (45 to 47).
  • the light may be emitted (RGB added after the LED 41 means a light emission color). That is, a direct type backlight unit 49 may be used.
  • the receiving unit 31 receives a video / audio signal such as a television broadcast signal, and the video signal processing unit 11 processes the video signal in the received signal. Therefore, it can be said that such a liquid crystal display device 69 is also a television broadcast receiver.
  • the video signal processed by the liquid crystal display device 69 is not limited to television broadcasting. For example, it may be a video signal included in a recording medium on which content such as a movie is recorded or a video signal transmitted via the Internet.
  • the process control unit 13 may acquire the data generation program through communication from the communication network.
  • the communication network includes the Internet, infrared communication, etc. regardless of wired wireless.
  • the light source color video signal (light quantity adjustment data) subjected to the correction processing is expressed as a light source red video signal RSd ′, a light source green video signal GSd ′, and a light source blue video signal BSd ′ (that is, The signal after the correction process is marked with “'”).
  • the relationship between the PWM value, which is the color image signal for light source (RSd, GSd, BSd), and the luminance of the LED chip 42 that emits light according to the color image signal for light source is a directly proportional relationship.
  • the PWM value and the luminance of the LED chip 42 do not have a direct proportional relationship of 1: 1, for example, due to the instantaneous heat generation caused by the light emission of the LED chip 42. Therefore, the relationship between the PWM value of the white light from the LED 41 including the LED chip 42 and the brightness of the white light from the LED 41 is not easily proportional.
  • the present liquid crystal display device 69 has, for example, a configuration that compensates for the luminance shift using a general look-up table.
  • the processing controller 13 and the built-in memory 12 are incorporated in the LED controller 21, and the processing controller 13 (and thus the LED controller 21) transmits from the pulse width modulator 23.
  • the light source color video signals (RSd, BSd, GSd) are subjected to correction processing using a lookup table, and the light source color video signals (RSd ′, BSd ′, GSd ′) after the correction processing are obtained. You may transmit to the LED driver 33.
  • one display area (entire display area) corresponding to the entire surface of one liquid crystal display panel 59 is divided into a plurality of areas (display areas), and different images are displayed in each display area. indicate.
  • the liquid crystal display panel 59 is divided into two display areas (a first display area and a second display area), and the aspect ratio (aspect ratio) of the first display area is 16. : 9, the aspect ratio of the second display area is 5: 9, and the aspect ratio of the entire display area including the first and second display areas is 21: 9.
  • a full HD (Full (High Definition) image is displayed in the first display region without being reduced, and at the same time, other contents (for example, time, An image such as a calendar, character information associated with an image in the first display area, a multi-channel television image, or the like can be displayed.
  • FIG. 13 is a schematic diagram showing another configuration of the liquid crystal display panel 59.
  • the aspect ratio of the first display area is 16: 9
  • the aspect ratio of the second display area is 16: 1
  • the aspect ratio of the entire display area is 16:10.
  • the first display area and the second display area are arranged in the vertical direction.
  • the liquid crystal display panel 59 of FIG. 13A the aspect ratio of the first display area is 16: 9
  • the aspect ratio of the second display area is 16: 1
  • the aspect ratio of the entire display area is 16:10.
  • the first display area and the second display area are arranged in the vertical direction.
  • 13B further includes a third display area, the aspect ratio of the first display area is 16: 9, the aspect ratio of the second display area is 5: 9, The aspect ratio is 21: 1, and the aspect ratio of the entire display area is 21:10. According to the configuration of FIG. 13B, it is possible to display different contents in the second display area and the third display area at the same time while displaying the full HD video in the first display area without reducing it. it can.
  • the backlight unit 49 has a different configuration for each display area corresponding to each display area of the liquid crystal display panel 59.
  • the specific structural example of the backlight unit 49 corresponding to the liquid crystal display panel 59 shown in FIG. 6 is demonstrated.
  • the light source arranged in the area corresponding to the first display area of the liquid crystal display panel 59 is the first light source
  • the light source arranged in the area corresponding to the second display area is the second light source.
  • FIG. 7 is a plan view showing a schematic configuration of the backlight unit 49 according to Configuration Example 1.
  • FIG. The backlight unit 49 in FIG. 7 is a so-called direct type backlight unit in which a light source is provided on the back side of the liquid crystal display panel 59. In the first display area, one LED 41 (first light source) is provided.
  • Red light emitting (R) LED chip (hereinafter also referred to as R-LED chip) 42R, one green light emitting (G) LED chip (hereinafter also referred to as G-LED chip) 42G, and one blue light emitting (B) LED chip (hereinafter also referred to as B-LED chip) 42B, and in the second display area, each LED 41 (second light source) has three white light emitting (W) LED chips (hereinafter referred to as 42W) (also called W-LED chip).
  • W white light emitting
  • the display is performed by the RGB LED chips in the first display area, it is possible to realize a display with a wide color reproduction range, and in the second display area, the display is performed by the W-LED having high luminous efficiency. Therefore, the power consumption of the second display area can be reduced compared to the first display area.
  • the number of LEDs 41 provided in the backlight unit 49 is not particularly limited in the first display area and the second display area, and the arrangement pitch of the LEDs 41 is different in the first display area and the second display area. They may be the same or different.
  • FIG. 8 is a plan view showing a schematic configuration of the backlight unit 49 according to Configuration Example 2.
  • a light source first light source and second light source
  • each LED 41 includes one R-LED in both the first and second display areas.
  • the chip 42R is composed of one G-LED chip 42G and one B-LED chip 42B.
  • the arrangement pitch of the LEDs 41 is different between the first and second display areas. For example, as shown in FIG. 8, in the first display area, the LEDs 41 are arranged at a narrow pitch (dense), and in the second display area, the LEDs 41 are arranged at a wide pitch (sparse).
  • the LEDs 41 (first light sources) are densely arranged in the first display area, so that high-quality display can be realized.
  • the LEDs 41 (second light sources) Since it is sparsely arranged, cost and power consumption can be reduced.
  • FIG. 9 is a plan view showing a schematic configuration of the backlight unit 49 according to Configuration Example 3.
  • the backlight unit 49 of FIG. 9 includes a plurality of LEDs 41 (first light sources) composed of an R-LED chip 42R, a G-LED chip 42G, and a B-LED chip 42B.
  • first light sources composed of an R-LED chip 42R, a G-LED chip 42G, and a B-LED chip 42B.
  • second LEDs 41 composed of R-LED chips 42R, G-LED chips 42G, and B-LED chips 42B Light sources
  • the number of LEDs 41 corresponding to the second display area may be one.
  • one or a plurality of LEDs 41 corresponding to the second display area may be arranged only on one side surface side, and the plurality of LEDs 41 corresponding to the second display area face each other on opposite side faces. It may be arranged as follows.
  • the backlight unit 49 in the second display area is configured such that light incident on the side surface of a light guide plate (not shown) provided on the back side of the liquid crystal display panel 59 is emitted from the top surface of the light guide plate to the outside. It is.
  • the backlight unit 49 is a direct type, so that a high-quality display can be realized.
  • the backlight unit 49 is an edge type. Cost and power consumption can be reduced.
  • the light source (second light source) arranged in the second display area is not limited to the LED, and a fluorescent tube such as CCFL (cold cathode tube) or HCFL (hot cathode tube) can also be used. .
  • CCFL cold cathode tube
  • HCFL hot cathode tube
  • FIG. 10 is a plan view showing a schematic configuration of a backlight unit 49 according to Configuration Example 4.
  • the backlight unit 49 of FIG. 10 includes a plurality of LEDs 41 (first light sources) arranged in a matrix in the first display area, and a light source 41p (second light source) different from the LEDs in the second display area, for example, CCFL.
  • a fluorescent tube such as HCFL is disposed on the back side of the liquid crystal display panel 59.
  • the configuration of the optical sheet may be different between the first display area and the second display area.
  • the directivity of the optical sheet in the second display area is made higher than that in the first display area.
  • the cost can be reduced by not providing a prism sheet in the second display area. Thereby, in the second display area, desired luminance can be obtained with low power consumption.
  • FIG. 11 is a plan view illustrating a schematic configuration of a backlight unit 49 according to Configuration Example 6.
  • a light source (a first light source and a second light source) may not be arranged at a boundary portion between the first display area and the second display area.
  • the partition wall 60 for optically separating the first display area and the second display area can be easily formed. Therefore, since light leakage between the first display area and the second display area can be prevented, display quality can be improved.
  • FIG. 14 is a plan view showing a schematic configuration of a backlight unit 49 according to Configuration Example 7.
  • light sources first light source and second light source
  • each LED 41 includes three Ws in both the first display region and the second display region.
  • each W-LED chip 42W differs between the first display area and the second display area.
  • LEDs have different luminous efficiencies depending on the chip size, and there are three types: small type (small), middle type (medium), and large type (large), and the large type has the highest luminous efficiency.
  • a large type W-LED chip 42W is provided in the first display area, and a middle type (medium) or small type (small) W-LED chip 42W is provided in the second display area.
  • a middle type (medium) W-LED chip 42W may be provided in the first display area, and a small type (small) W-LED chip 42W may be provided in the second display area.
  • FIG. 15 is a plan view illustrating a schematic configuration of a backlight unit 49 according to Configuration Example 8.
  • the light source first light source and second light source
  • each LED 41 includes three W-LEDs in both the first and second display areas.
  • the chip 42W is configured, the configuration of the phosphor of the W-LED chip 42W is different from each other.
  • LEDs have different light emission efficiency and color reproducibility depending on the structure of the phosphor. The light emission efficiency is high but the color reproducibility is narrow. The light emission efficiency is low but the color reproducibility is wide (so-called high color rendering type).
  • the first display area is provided with a high color rendering type W-LED chip 42W capable of vivid display
  • the second display area is a type with high light emission efficiency giving priority to power saving.
  • the W-LED chip 42W can be provided.
  • the backlight unit 49 shown in FIG. 5 is integrally formed including the first display area and the second display area.
  • the backlight unit is provided for each display area. These backlight units may be combined individually to constitute one backlight unit corresponding to the liquid crystal display panel 59.
  • the backlight unit 49 in the first display area may be an edge type. Thereby, cost and power consumption can be further reduced.
  • one entire display area corresponding to one liquid crystal display panel 59 is divided into a plurality of display areas, and a function of displaying different images in each display area ( (Hereinafter referred to as “divided screen display mode”) and a function for displaying one image in one display area (all display areas) corresponding to the entire surface of the liquid crystal display panel 59, which is a sum of the display areas (hereinafter referred to as “display screen”). And a configuration for switching between the split screen display mode and the full screen display mode based on the video signal received by the receiving unit 31.
  • the switching method between the split screen display mode and the full screen display mode can be realized by the following method, for example. That is, as shown in FIG. 4, the processing control unit 13 of the video signal processing unit 11 generates the display mode switching signal SSW based on the video signal received from the outside. Then, the process control unit 13 transmits a display mode switching signal SSW to the liquid crystal display panel controller 32.
  • the liquid crystal display panel controller 32 controls the pixels of the liquid crystal display panel 59 (see FIG. 1) based on the display mode switching signal SSW to display an image on the corresponding display area or one entire display area.
  • the liquid crystal display panel 59 is divided into two display areas (a first display area and a second display area), and the aspect ratio (aspect ratio) of the first display area is 16. : 9, the aspect ratio of the second display area is 5: 9, and the aspect ratio of the entire display area including the first and second display areas is 21: 9.
  • a full HD (Full High Definition) image is displayed in the first display area without being reduced, and at the same time,
  • Other contents for example, images such as time and calendar, character information associated with video in the first display area, multi-channel television video, etc.
  • images such as time and calendar, character information associated with video in the first display area, multi-channel television video, etc.
  • the full screen display mode it is possible to display a video such as movie content having an aspect ratio of 21: 9 without reducing it.
  • a video such as movie content having an aspect ratio of 21: 9
  • display is performed in the split screen display mode, and when video of movie content is received, display is performed in the full screen display mode. Is called.
  • the number of display area divisions is not limited to two, but may be three or more, and the aspect ratio of each display area is also limited to the above value. It is not a thing.
  • the backlight unit 49 has a different configuration for each display area corresponding to the liquid crystal display panel 59, and each configuration according to the first embodiment described above. An example can be applied.
  • the present liquid crystal display device 69 has a function of switching between the split screen display mode and the full screen display mode, and the configuration of the backlight unit 49 is different for each display area.
  • the display is switched from the full-screen display mode to the display, there is a possibility that a luminance difference (display unevenness) may occur for each display area. Therefore, a driving method for eliminating the luminance difference for each display area will be described below.
  • each LED 41 includes one R-LED chip 42R, one In the second display area, each LED 41 (second light source) is composed of three W-LED chips 42W, each of which is composed of a G-LED chip 42G and one B-LED chip 42B.
  • the brightness difference can be eliminated by adjusting the brightness of each LED 41 so that the display brightness and color temperature of one display area are equal to the display brightness and color temperature of the second display area.
  • the overall display luminance can be made uniform.
  • each LED 41 is configured by three W-LED chips 42W.
  • the luminance difference can be eliminated by adjusting the light emission efficiency of each LED 41.
  • the luminance of each W-LED chip 42W in the first display area having high luminous efficiency and each of the second display areas The brightness of each W-LED chip 42W in the first display area is set low so that the brightness of the W-LED chip 42W becomes equal. Thereby, the display brightness as a whole can be made uniform.
  • the brightness of each W-LED chip 42W in the first display area is equal to the brightness of each W-LED chip 42W in the second display area.
  • the display brightness may be adjusted on the liquid crystal display panel 59 side without adjusting the brightness of the LEDs 41 in the first display area and the second display area.
  • the liquid crystal display panel controller 32 controls the pixels of the liquid crystal display panel 59 (see FIG. 1) and adjusts the transmittance of the liquid crystal for each RGB pixel, thereby displaying the entire display The luminance can be made uniform.
  • the display panel includes at least a first display area and a second display area
  • a plurality of first light sources including at least a red light emitting diode element, a green light emitting diode element, and a blue light emitting diode element are disposed corresponding to the first display area
  • a plurality of second light sources including white light emitting diode elements may be arranged.
  • the display panel includes at least a first display area and a second display area,
  • the arrangement pitch of a plurality of first light sources arranged corresponding to the first display area is smaller than the arrangement pitch of a plurality of second light sources arranged corresponding to the second display area.
  • the display panel includes at least a first display area and a second display area
  • the first light source corresponding to the first display area included in the backlight is disposed on the back side of the display panel
  • the second light source corresponding to the second display area included in the backlight may be arranged on the side surface side of the display panel.
  • the display panel includes at least a first display area and a second display area
  • the first light source corresponding to the first display area included in the backlight is composed of a light emitting diode
  • the second light source corresponding to the second display area included in the backlight may be formed of a fluorescent tube.
  • the display panel includes at least a first display area and a second display area
  • the directivity of the optical sheet corresponding to the second display area included in the backlight may be higher than the directivity of the optical sheet corresponding to the first display area included in the backlight.
  • the display panel includes at least a first display area and a second display area
  • the first light source corresponding to the first display area and the second light source corresponding to the second display area included in the backlight are configured by light emitting diodes,
  • the size of the first light source and the size of the second light source may be different from each other.
  • the light-emitting diode may emit white light.
  • the backlight is configured so that the display brightness of each display area is uniform when one image is displayed in the entire display area corresponding to the entire surface of the display panel obtained by adding all the display areas. Can do.
  • the display panel has two or more display areas, The aspect ratio of at least one display area may be 16: 9.
  • a full HD (Full High Definition) video can be displayed without being reduced.
  • the display panel includes a first display area and a second display area,
  • the aspect ratio of the first display area may be 16: 9, and the aspect ratio of the second display area may be 5: 9.
  • a full HD (Full High Definition) video is displayed in the first display area without being reduced, and at the same time, other contents (for example, images such as time and calendar, , Character information associated with the video in the first display area, multi-channel television video, etc.) can be displayed.
  • other contents for example, images such as time and calendar, , Character information associated with the video in the first display area, multi-channel television video, etc.
  • the aspect ratio of all the display areas corresponding to the entire surface of the display panel obtained by adding all the display areas may be 21: 9.
  • the video when one video is displayed in the entire display area obtained by adding up all the display areas (full screen display mode), the video such as movie content having an aspect ratio of 21: 9 is reduced. Can be displayed.
  • the display panel includes a first display area and a second display area,
  • the aspect ratio of the first display area is 16: 9
  • the aspect ratio of the second display area is 16: 1, and all display areas corresponding to the entire surface of the display panel including all display areas are added.
  • An aspect ratio may be 16:10.
  • the display areas may be arranged in the horizontal direction or the vertical direction on the display panel surface.
  • the display brightness is different for each display area
  • the backlight brightness may be adjusted for each display area so that the display brightness is uniform in the entire display area.
  • the luminance difference (display unevenness) generated for each display area can be eliminated.
  • the display brightness is different for each display area
  • the liquid crystal transmittance may be adjusted for each display area so that the display luminance is uniform in the entire display area.
  • the luminance difference (display unevenness) generated for each display area can be eliminated.
  • the display device of the present invention can be suitably used for various applications such as mobile devices such as mobile phones and PDAs, and TVs.
  • Video signal processing unit 12 Built-in memory 13 Processing control unit 21 LED controller 22 LED driver control unit 23 Pulse width modulation unit 31 Reception unit 32 Liquid crystal display panel controller 33 LED driver 41 LED (first light source, second light source) 41R Red LED 41G green LED 41B Blue LED 42R Red LED chip (red LED element) 42G Green LED chip (Green LED) 42B Blue light emitting LED chip (light emitting diode element emitting blue light) 42W white light emitting LED chip (white light emitting diode element) 49 Backlight unit (backlight) 59 Liquid crystal display panel 60 Bulkhead 69 Liquid crystal display device

Abstract

Provided is a display device, comprising a display panel with a plurality of display areas and a backlight that irradiates light onto the display panel. The backlight is configured such that the display brightness differs for each of the display areas when different images are displayed in each of the display areas. An LED (41) that includes one each of an R-LED chip (42R), a G-LED chip (42G), and a B-LED chip (42B) is arranged in the first display area of the backlight and an LED (41) that includes three W-LED chips (42W) is arranged in the second display area of the backlight. Power consumption can be reduced by this invention.

Description

表示装置およびその駆動方法Display device and driving method thereof
　本発明は、発光ダイオードを含むバックライト装置を備えた表示装置に関する。 The present invention relates to a display device including a backlight device including a light emitting diode.
　近年、液晶表示装置において、自発光素子である発光ダイオード（以下、ＬＥＤともいう）を光源として用いたバックライト装置が提案されている（例えば、特許文献１参照）。 Recently, in liquid crystal display devices, backlight devices using light-emitting diodes (hereinafter also referred to as LEDs) which are self-luminous elements as light sources have been proposed (for example, see Patent Document 1).
　発光ダイオードは、従来の光源として用いられている冷陰極管と比較して、長寿命、低消費電力、高輝度といった多くの利点を有している。 The light emitting diode has many advantages such as long life, low power consumption, and high brightness as compared with the cold cathode tube used as a conventional light source.
　発光ダイオードを用いたバックライト装置では、１つの発光ダイオードが、赤（Ｒ）色を発光する発光ダイオード素子、緑（Ｇ）色を発光する発光ダイオード素子、青（Ｂ）色を発光する発光ダイオード素子を含み、これらの混色により白色を発光するタイプや、１つの発光ダイオードが、何れか一色の発光ダイオード素子を含み、当該色を発光するタイプなどがある。 In a backlight device using a light emitting diode, one light emitting diode emits a red (R) light emitting diode element, a green (G) light emitting diode element, and a blue (B) light emitting diode. There are a type that includes an element and emits white light by mixing these colors, and a type in which one light emitting diode includes a light emitting diode element of any one color and emits the color.
　図１２は、特許文献１のバックライト装置の概略構成を示すブロック図である。同図に示すように、このバックライト装置では、赤色、緑色、青色をそれぞれ発光する複数の発光ダイオード１２０が、表示パネルの全面に対応するように、発光部プリント基板１５０上に均一に配されている。これにより、表示パネル面内で均一に発光させることができるため、均一な表示を行うことができる。 FIG. 12 is a block diagram showing a schematic configuration of the backlight device of Patent Document 1. In FIG. As shown in the figure, in this backlight device, a plurality of light emitting diodes 120 that respectively emit red, green, and blue light are uniformly arranged on the light emitting unit printed circuit board 150 so as to correspond to the entire surface of the display panel. ing. Thereby, since it can light-emit uniformly within the display panel surface, a uniform display can be performed.
日本国公開特許公報「特開２００６－１２８１２５号公報（２００６年５月１８日公開）」Japanese Patent Publication “JP 2006-128125 A (published May 18, 2006)”
　ところで、近年、１枚の表示パネルに対応する全表示領域を複数の領域に分割して、分割した表示領域ごとに異なる画像を表示する液晶表示装置が提案されている。 Incidentally, in recent years, a liquid crystal display device has been proposed in which the entire display area corresponding to one display panel is divided into a plurality of areas, and a different image is displayed for each divided display area.
　このような液晶表示装置では、表示するコンテンツが表示領域ごとに異なり、要求される表示品位も表示領域ごとに異なるものが多い。 In such a liquid crystal display device, the content to be displayed is different for each display area, and the required display quality is often different for each display area.
　このような場合、上記従来のバックライト装置を用いた液晶表示装置では、発光ダイオードが均一に配されているため、無駄に消費される電力が増大することになり、発光効率が低下する。 In such a case, in the liquid crystal display device using the conventional backlight device described above, since the light emitting diodes are uniformly arranged, the power consumed in vain increases and the light emission efficiency decreases.
　そこで、本発明では、表示領域を複数の領域に分割して表示を行うことが可能な表示装置において、消費電力を削減することを目的とする。 Therefore, an object of the present invention is to reduce power consumption in a display device that can perform display by dividing a display area into a plurality of areas.
　本発明に係る表示装置は、上記の課題を解決するために、
　複数の表示領域を有する表示パネルと、該表示パネルに光を照射するバックライトとを備えた表示装置であって、
　上記バックライトは、上記表示領域ごとに異なる画像を表示する場合には、上記表示領域ごとに表示輝度が異なるように構成されていることを特徴とする。 In order to solve the above problems, a display device according to the present invention provides
A display device comprising a display panel having a plurality of display areas, and a backlight for irradiating the display panel with light,
The backlight is configured to have different display brightness for each display area when displaying different images for each display area.
　上記の構成によれば、例えば表示パネルが第１表示領域と第２表示領域とを含む場合、第２表示領域の表示輝度が第１表示領域の表示輝度よりも低くなるように、バックライトを構成することができる。具体的には例えば、第２表示領域の光源の配列ピッチが、第１表示領域の光源の配列ピッチよりも広くなるように構成することができる。これにより、第２表示領域の輝度を低くすることができるため、表示装置の消費電力を削減することができる。 According to the above configuration, for example, when the display panel includes the first display area and the second display area, the backlight is set so that the display brightness of the second display area is lower than the display brightness of the first display area. Can be configured. Specifically, for example, the arrangement pitch of the light sources in the second display area can be configured to be wider than the arrangement pitch of the light sources in the first display area. Thereby, since the brightness | luminance of a 2nd display area can be made low, the power consumption of a display apparatus can be reduced.
　本発明に係る表示装置の駆動方法は、上記の課題を解決するために、
　複数の表示領域を有する表示パネルと、該表示パネルに光を照射するバックライトとを備えた表示装置の駆動方法であって、
　上記バックライトは、上記表示領域ごとに表示輝度が異なるように構成されており、
　上記表示領域ごとに異なる画像を表示する分割画面表示モードと、全ての表示領域を足し合わせた上記表示パネルの全面に対応する全表示領域に１つの画像を表示する全画面表示モードとを含み、
　外部から入力された映像信号に基づいて、上記分割画面表示モードおよび上記全画面表示モードを相互に切り替えることを特徴とする。 In order to solve the above problems, a display device driving method according to the present invention is provided.
A display device driving method comprising a display panel having a plurality of display areas and a backlight for irradiating the display panel with light,
The backlight is configured to have different display brightness for each display area,
A split screen display mode for displaying different images for each display region, and a full screen display mode for displaying one image in the entire display region corresponding to the entire surface of the display panel obtained by adding all the display regions,
The split screen display mode and the full screen display mode are switched to each other based on a video signal input from the outside.
　上記の方法によれば、例えば、第１表示領域のアスペクト比（横縦比）が１６：９、第２表示領域のアスペクト比が５：９、第１および第２表示領域を合わせた全表示領域のアスペクト比が２１：９で構成されている場合、分割画面表示モードでは、第１表示領域にフルＨＤ（Full High Definition）映像を縮小することなく表示しつつ、同時に、第２表示領域には他のコンテンツ（例えば、時刻、カレンダーなどの画像や、第１表示領域の映像に関連付けられた文字情報や、多チャンネルのテレビ映像など）を表示させることができる。また、全画面表示モードでは、アスペクト比２１：９の映画コンテンツなどの映像を縮小することなく表示させることができる。 According to the above method, for example, the aspect ratio (aspect ratio) of the first display area is 16: 9, the aspect ratio of the second display area is 5: 9, and the entire display including the first and second display areas is combined. When the aspect ratio of the area is 21: 9, in the split screen display mode, a full HD (Full High Definition) image is displayed in the first display area without being reduced, and at the same time in the second display area. Can display other contents (for example, images such as time and calendar, text information associated with video in the first display area, multi-channel television video, etc.). In the full screen display mode, it is possible to display a video such as movie content having an aspect ratio of 21: 9 without reducing it.
　以上のように、本発明に係る表示装置では、上記バックライトは、上記表示領域ごとに異なる画像を表示する場合には、上記表示領域ごとに表示輝度が異なるように構成されている。そのため、表示領域を複数の領域に分割して表示を行うことが可能な表示装置において、消費電力を削減することができるという効果を奏する。 As described above, in the display device according to the present invention, the backlight is configured so that the display luminance is different for each display area when different images are displayed for each display area. Therefore, there is an effect that power consumption can be reduced in a display device that can perform display by dividing a display region into a plurality of regions.
本実施の形態に係る液晶表示装置を示す分解斜視図である。It is a disassembled perspective view which shows the liquid crystal display device which concerns on this Embodiment. 図１の液晶表示装置に含まれるバックライトユニットの一部を示す分解斜視図である。It is a disassembled perspective view which shows a part of backlight unit contained in the liquid crystal display device of FIG. （ａ）～（ｃ）は、ＬＥＤチップが一端から他端に向かって、ＧＲＧＢ配列になったＬＥＤの正面図である。(A)-(c) is a front view of the LED in which the LED chips are arranged in a GRGB array from one end to the other end. 図１の液晶表示装置に含まれる種々部材を示すブロック図である。It is a block diagram which shows the various members contained in the liquid crystal display device of FIG. 本実施の形態に係る液晶表示装置を示す分解斜視図である。It is a disassembled perspective view which shows the liquid crystal display device which concerns on this Embodiment. 本実施の形態に係る液晶表示パネルにおける表示領域を示す模式図である。It is a schematic diagram which shows the display area in the liquid crystal display panel which concerns on this Embodiment. 構成例１に係るバックライトユニットの概略構成を示す平面図である。4 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 1. FIG. 構成例２に係るバックライトユニットの概略構成を示す平面図である。12 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 2. FIG. 構成例３に係るバックライトユニットの概略構成を示す平面図である。12 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 3. FIG. 構成例４に係るバックライトユニットの概略構成を示す平面図である。12 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 4. FIG. （ａ）は構成例６に係るバックライトユニットの概略構成を示す平面図であり、（ｂ）はその側面図である。(A) is a top view which shows schematic structure of the backlight unit which concerns on the structural example 6, (b) is the side view. 従来のバックライト装置の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the conventional backlight apparatus. （ａ）および（ｂ）は、本実施の形態に係る液晶表示パネルにおける他の表示領域を示す模式図である。(A) And (b) is a schematic diagram which shows the other display area in the liquid crystal display panel which concerns on this Embodiment. 構成例７に係るバックライトユニットの概略構成を示す平面図である。12 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 7. FIG. 構成例８に係るバックライトユニットの概略構成を示す平面図である。FIG. 10 is a plan view illustrating a schematic configuration of a backlight unit according to Configuration Example 8.
　〔実施の形態１〕
　本発明の一実施の形態について図面を用いて説明する。なお、便宜上、部材符号等を省略する場合もあるが、かかる場合、他の図面を参照するものとする。また、記載される数値実施例は、一例にすぎず、その数値に限定されるものではない。 [Embodiment 1]
An embodiment of the present invention will be described with reference to the drawings. For convenience, member codes and the like may be omitted, but in such a case, other drawings are referred to. The numerical examples described are only examples and are not limited to the numerical values.
　まず、本実施の形態に係る液晶表示装置（表示装置）の概略構成について説明する。 First, a schematic configuration of the liquid crystal display device (display device) according to the present embodiment will be described.
　図１は、本実施の形態に係る液晶表示装置６９を示す分解斜視図である。なお、後述する導光板４３の個数は、便宜上、比較的少ない数しか図示していない。また、図２は、液晶表示装置６９に含まれるバックライトユニット４９の一部を示す分解斜視図である。 FIG. 1 is an exploded perspective view showing a liquid crystal display device 69 according to the present embodiment. For the sake of convenience, only a relatively small number of light guide plates 43 to be described later is illustrated. FIG. 2 is an exploded perspective view showing a part of the backlight unit 49 included in the liquid crystal display device 69.
　図１に示すように、液晶表示装置６９は、液晶表示パネル５９と、バックライトユニット４９と、それらを挟むハウジングＨＧ（ＨＧ１・ＨＧ２）とを含む。 As shown in FIG. 1, the liquid crystal display device 69 includes a liquid crystal display panel 59, a backlight unit 49, and a housing HG (HG1 and HG2) sandwiching them.
　液晶表示パネル５９は、ローカルディミング方式を採用する。そのため、この液晶表示パネル５９では、不図示のＴＦＴ（Thin Film Transistor）等のアクティブ素子が設けられたアクティブマトリクス基板５１と、このアクティブマトリクス基板５１に対向する対向基板５２とで、液晶（不図示）を挟み込む。つまり、アクティブマトリクス基板５１および対向基板５２は、液晶を挟むための基板であり、透明なガラス等で形成される。 The liquid crystal display panel 59 employs a local dimming method. Therefore, in this liquid crystal display panel 59, liquid crystal (not shown) is composed of an active matrix substrate 51 provided with active elements such as TFT (Thin Film Transistor) (not shown) and a counter substrate 52 facing the active matrix substrate 51. ). That is, the active matrix substrate 51 and the counter substrate 52 are substrates for sandwiching liquid crystal, and are formed of transparent glass or the like.
　なお、アクティブマトリクス基板５１と対向基板５２との外縁には、不図示のシール材が取り付けられ、このシール材により液晶を封止する。また、アクティブマトリクス基板５１および対向基板５２を挟むように、偏光フィルムＰＬが設けられている。 A sealing material (not shown) is attached to the outer edge of the active matrix substrate 51 and the counter substrate 52, and the liquid crystal is sealed with this sealing material. A polarizing film PL is provided so as to sandwich the active matrix substrate 51 and the counter substrate 52.
　この液晶表示パネル５９は非発光型の表示パネルなので、バックライトユニット４９からの光（バックライト光）を受光することにより表示機能を発揮する。そのため、バックライトユニット４９からの光が液晶表示パネル５９の全面を均一に照射できれば、液晶表示パネル５９の表示品位が向上する。 Since the liquid crystal display panel 59 is a non-light emitting display panel, it receives a light (backlight light) from the backlight unit 49 and exhibits a display function. Therefore, if the light from the backlight unit 49 can uniformly irradiate the entire surface of the liquid crystal display panel 59, the display quality of the liquid crystal display panel 59 is improved.
　そして、このようなバックライトユニット４９は、ＬＥＤモジュールＭＪ、導光板セットＳＴ、拡散シート４５、プリズムシート４６・４７を含む。 Such a backlight unit 49 includes an LED module MJ, a light guide plate set ST, a diffusion sheet 45, and prism sheets 46 and 47.
　ＬＥＤモジュールＭＪは、光を発するモジュールであり、図２に示すように、実装基板４０と、その実装基板４０における実装基板面４０Ｕに形成された電極に実装され、電流の供給を受けて光を発するＬＥＤ（Light Emitting Diode）４１と、を含む。 The LED module MJ is a module that emits light. As shown in FIG. 2, the LED module MJ is mounted on a mounting substrate 40 and electrodes formed on the mounting substrate surface 40U of the mounting substrate 40, and receives light to supply light. LED (Light Emitting Diode) 41 to emit.
　また、ＬＥＤモジュールＭＪは、光量確保のために、複数の発光素子であるＬＥＤ（光源）４１を含むことが望ましく、さらに、ＬＥＤ４１をマトリクス状に並列させることがより望ましい。ただし、図面では便宜上、一部のＬＥＤ４１のみが示されているにすぎない。なお、以降では、ＬＥＤ４１の並ぶ一方向をＸ方向、このＸ方向に交差（例えば直交）する方向をＹ方向と称する。 Also, the LED module MJ preferably includes a plurality of LEDs (light sources) 41, which are light emitting elements, in order to ensure the amount of light, and more preferably, the LEDs 41 are arranged in a matrix. However, in the drawing, only a part of the LEDs 41 is shown for convenience. Hereinafter, one direction in which the LEDs 41 are arranged is referred to as an X direction, and a direction intersecting (for example, orthogonal to) the X direction is referred to as a Y direction.
　なお、ＬＥＤ４１の種類は、特に限定されるものではない。一例として、図３の（ａ）のＬＥＤ４１の正面図に示すような、１個の赤色発光（Ｒ）のＬＥＤチップ４２Ｒ、２個の緑色発光（Ｇ）のＬＥＤチップ４２Ｇ、および１個の青色発光（Ｂ）のＬＥＤチップ４２Ｂを並列させ、混色により白色光を生成するＬＥＤ４１が挙げられる。なお、図３の（ａ）に示すように、一端から他端に向かって、ＬＥＤチップ４２Ｇ、ＬＥＤチップ４２Ｒ、ＬＥＤチップ４２Ｇ、ＬＥＤチップ４２Ｂと並ぶ場合、ＧＲＧＢ配列と称する。 In addition, the kind of LED41 is not specifically limited. As an example, one red light emitting (R) LED chip 42R, two green light emitting (G) LED chips 42G, and one blue light as shown in the front view of the LED 41 in FIG. There is an LED 41 that emits white light by color mixing by arranging the light emitting (B) LED chips 42B in parallel. In addition, as shown to (a) of FIG. 3, when it arranges with LED chip 42G, LED chip 42R, LED chip 42G, and LED chip 42B from one end to the other end, it is called a GRGB arrangement.
　次に、導光板セットＳＴについて説明する。導光板セットＳＴは、導光板４３と反射シート４４とを含む。 Next, the light guide plate set ST will be described. The light guide plate set ST includes a light guide plate 43 and a reflection sheet 44.
　導光板４３は、自身に入射するＬＥＤ４１の光を多重反射させて、外部に出射させる。この導光板４３は、図２に示すように、光を受光する受光片４３Ｒと、この受光片４３Ｒにつながる出射片４３Ｓとを含む。 The light guide plate 43 multi-reflects the light of the LED 41 incident thereon and emits the light to the outside. As shown in FIG. 2, the light guide plate 43 includes a light receiving piece 43R that receives light and an emission piece 43S connected to the light receiving piece 43R.
　受光片４３Ｒは、板状部材であり、側壁の一部分に切欠ＫＣを有する。この切欠ＫＣは、自身の底ＫＣｂにＬＥＤ４１の発光面４２Ｌを対向させつつ、そのＬＥＤ４１を囲める程度のスペースを有する。そのため、この切欠ＫＣに収まるようにＬＥＤ４１が取り付けられると、切欠ＫＣの底ＫＣｂが導光板４３の受光面４３Ｒｓとなる。なお、受光片４３Ｒの側壁を挟む２面のうち、実装基板４０側に向く面を底面４３Ｒｂ、その底面４３Ｒｂの反対面を天面４３Ｒｕとする。 The light receiving piece 43R is a plate-like member and has a notch KC in a part of the side wall. The notch KC has a space enough to surround the LED 41 while the light emitting surface 42L of the LED 41 faces the bottom KCb of the notch KC. Therefore, when the LED 41 is mounted so as to be accommodated in the notch KC, the bottom KCb of the notch KC becomes the light receiving surface 43Rs of the light guide plate 43. Of the two surfaces sandwiching the side wall of the light receiving piece 43R, the surface facing the mounting substrate 40 is a bottom surface 43Rb, and the surface opposite to the bottom surface 43Rb is the top surface 43Ru.
　出射片４３Ｓは、受光片４３Ｒに並ぶようにして連なり、受光面４３Ｒｓから入射する光の進行先に位置する板状部材である。この出射片４３Ｓは、受光片４３Ｒの底面４３Ｒｂと同一面（面一）となる底面４３Ｓｂを有する一方、受光片４３Ｒの天面４３Ｒｕに対して高くなる段差を生じさせる天面４３Ｓｕを有する。 The emission pieces 43S are plate-like members that are arranged so as to line up with the light receiving pieces 43R and are located at the destination of light incident from the light receiving surface 43Rs. The emitting piece 43S has a bottom surface 43Sb that is flush with the bottom surface 43Rb of the light receiving piece 43R, and has a top surface 43Su that causes a step that becomes higher than the top surface 43Ru of the light receiving piece 43R.
　さらに、出射片４３Ｓにおける天面４３Ｓｕと底面４３Ｓｂとは、平行ではなく、一方面が他方面に対して傾斜する。詳説すると、受光面４３Ｒｓからの光の進行先に進むにつれて、底面４３Ｓｂが天面４３Ｓｕに近づくように傾く。つまり、出射片４３Ｓは、受光面４３Ｒｓからの光の進行先に進むにつれて、厚み（天面４３Ｓｕと底面４３Ｓｂとの間隔）を徐々に薄くすることで、先細りする（なお、このような先細りした出射片４３Ｓを含む導光板４３は、くさび形の導光板４３とも称される）。 Furthermore, the top surface 43Su and the bottom surface 43Sb of the emission piece 43S are not parallel, and one surface is inclined with respect to the other surface. More specifically, as the light travels from the light receiving surface 43Rs, the bottom surface 43Sb is inclined so as to approach the top surface 43Su. That is, the emission piece 43S tapers by gradually reducing the thickness (the distance between the top surface 43Su and the bottom surface 43Sb) as it proceeds to the destination of the light from the light receiving surface 43Rs (note that the taper is tapered). The light guide plate 43 including the emission piece 43S is also referred to as a wedge-shaped light guide plate 43).
　そして、このような受光片４３Ｒと出射片４３Ｓとを含む導光板４３は、受光面４３Ｒｓから光を受光し、その光を底面４３ｂ（４３Ｒｂ・４３Ｓｂ）と天面４３ｕ（４３Ｒｕ・４３Ｓｕ）との間で多重反射させ、天面４３Ｓｕから外部に向けて出射させる（なお、天面４３Ｓｕから出射する光は面状光と称される）。 The light guide plate 43 including the light receiving piece 43R and the emission piece 43S receives light from the light receiving surface 43Rs, and transmits the light to the bottom surface 43b (43Rb · 43Sb) and the top surface 43u (43Ru · 43Su). Are reflected from the top surface 43Su to the outside (light emitted from the top surface 43Su is referred to as planar light).
　ただし、底面４３ｂに対する光の入射角の関係上、その光が底面４３ｂから出射してしまうこともある。そこで、このような事態を防止すべく、反射シート４４は、導光板４３の底面４３ｂを覆い、その底面４３ｂから漏れる光を導光板４３内部に戻すように反射させる（ただし、図２では、便宜上、反射シート４４は省略する）。 However, the light may be emitted from the bottom surface 43b due to the incident angle of the light with respect to the bottom surface 43b. Therefore, in order to prevent such a situation, the reflection sheet 44 covers the bottom surface 43b of the light guide plate 43 and reflects the light leaking from the bottom surface 43b back to the inside of the light guide plate 43 (however, in FIG. The reflection sheet 44 is omitted).
　なお、以上のような導光板セットＳＴにおける導光板４３は、ＬＥＤ４１に応じてマトリクス状に並ぶ。特に、このようにＹ方向に沿って導光板セットＳＴが並ぶ場合、受光片４３Ｒの天面４３Ｒｕが出射片４３Ｓの底面４３Ｓｂを支え、集まる天面４３Ｓｕで同一面が完成する（天面４３Ｓｕが面一で集まる）。 The light guide plates 43 in the light guide plate set ST as described above are arranged in a matrix according to the LEDs 41. In particular, when the light guide plate sets ST are arranged in the Y direction in this way, the top surface 43Ru of the light receiving piece 43R supports the bottom surface 43Sb of the emission piece 43S, and the same surface is completed by the collected top surface 43Su (the top surface 43Su is Gather together.)
　また、Ｘ方向に沿って導光板セットＳＴが並ぶ場合でも、集まる天面４３Ｓｕで同一面が完成する。その結果、導光板４３の天面４３Ｓｕは、マトリクス状に並ぶことで、比較的大型な光出射面となる（このようなマトリクス状に並ぶ導光板４３をタンデム型導光板４３とも称する）。 In addition, even when the light guide plate sets ST are arranged along the X direction, the same surface is completed with the gathered top surfaces 43Su. As a result, the top surface 43Su of the light guide plate 43 is arranged in a matrix, thereby forming a relatively large light exit surface (the light guide plate 43 arranged in a matrix is also referred to as a tandem light guide plate 43).
　拡散シート４５は、マトリクス状に並ぶ導光板４３の天面４３Ｓｕを覆うように位置し、導光板４３からの面状光を拡散させて、液晶表示パネル５９全域に光をいきわたらせている（なお、この拡散シート４５とプリズムシート４６・４７とを、まとめて光学シート群（４５～４７）とも称する）。 The diffusion sheet 45 is positioned so as to cover the top surface 43Su of the light guide plates 43 arranged in a matrix, diffuses the planar light from the light guide plate 43, and spreads the light throughout the liquid crystal display panel 59 (note that The diffusion sheet 45 and the prism sheets 46 and 47 are collectively referred to as an optical sheet group (45 to 47)).
　プリズムシート４６・４７は、例えばシート面内にプリズム形状を有し、光の放射特性を偏向させる光学シートであり、拡散シート４５を覆うように位置する。そのため、このプリズムシート４６・４７は、拡散シート４５から進行してくる光を集光させ、輝度を向上させる。なお、プリズムシート４６とプリズムシート４７とによって集光される各光の発散方向は交差する関係にある。 The prism sheets 46 and 47 are, for example, optical sheets that have a prism shape in the sheet surface and deflect light emission characteristics, and are positioned so as to cover the diffusion sheet 45. Therefore, the prism sheets 46 and 47 collect the light traveling from the diffusion sheet 45 and improve the luminance. Note that the divergence directions of the lights collected by the prism sheet 46 and the prism sheet 47 intersect each other.
　次に、ハウジングＨＧについて説明する。ハウジングＨＧである表ハウジングＨＧ１と裏ハウジングＨＧ２とは、以上のバックライトユニット４９およびそのバックライトユニット４９を覆う液晶表示パネル５９を挟み込みつつ固定する（なお、固定の仕方は、特に限定されるものではない）。すなわち、表ハウジングＨＧ１は、バックライトユニット４９および液晶表示パネル５９を裏ハウジングＨＧ２とともに挟み込み、これにより、液晶表示装置６９が完成する。 Next, the housing HG will be described. The front housing HG1 and the back housing HG2, which are the housings HG, are fixed while sandwiching the above-described backlight unit 49 and the liquid crystal display panel 59 covering the backlight unit 49 (how to fix are particularly limited) is not). That is, the front housing HG1 sandwiches the backlight unit 49 and the liquid crystal display panel 59 together with the back housing HG2, thereby completing the liquid crystal display device 69.
　なお、裏ハウジングＨＧ２は、導光板セットＳＴ、拡散シート４５、プリズムシート４６・４７を、この順で積み重ねつつ収容する。この積み重なる方向をＺ方向と称する（なお、Ｘ方向、Ｙ方向、Ｚ方向は、互いに直交する関係であってもよい）。 The back housing HG2 accommodates the light guide plate set ST, the diffusion sheet 45, and the prism sheets 46 and 47 while being stacked in this order. This stacking direction is referred to as the Z direction (Note that the X direction, the Y direction, and the Z direction may be orthogonal to each other).
　そして、以上のようなバックライトユニット４９では、ＬＥＤ４１からの光は導光板セットＳＴを経ることで面状光になって出射し、その面状光は光学シート群（４５～４７）を通過することで発光輝度を高めたバックライト光になって出射する。そして、このバックライト光が、液晶表示パネル５９に到達し、そのバックライト光によって、液晶表示パネル５９は画像を表示させる。 In the backlight unit 49 as described above, the light from the LED 41 passes through the light guide plate set ST and is emitted as planar light, and the planar light passes through the optical sheet group (45 to 47). As a result, the light is emitted as backlight light with increased luminance. Then, the backlight light reaches the liquid crystal display panel 59, and the liquid crystal display panel 59 displays an image by the backlight light.
　ところで、タンデム型の導光板４３を搭載するバックライトユニット（タンデム方式バックライトユニット）４９は、導光板４３毎に出射光を制御可能なために、液晶表示パネル５９の表示領域を部分的に照射できる。そのため、このようなバックライトユニット４９は、ローカルディミング方式のバックライトユニット４９ともいえる。 By the way, the backlight unit (tandem backlight unit) 49 on which the tandem type light guide plate 43 is mounted can irradiate the display area of the liquid crystal display panel 59 partially because the emitted light can be controlled for each light guide plate 43. it can. Therefore, such a backlight unit 49 can be said to be a local dimming backlight unit 49.
　そこで、このようなローカルディミング方式のバックライトユニット４９による発光制御について、以下に説明する。 Therefore, the light emission control by the local dimming backlight unit 49 will be described below.
　図４は、液晶表示装置６９に含まれる種々部材を示すブロック図である（なお、この図４に示されるＬＥＤ４１は、複数あるＬＥＤ４１のうちの１つである）。この図４に示すように、液晶表示装置６９は、受信部３１、映像信号処理部（制御部）１１、液晶表示パネルコントローラ３２、ＬＥＤコントローラ２１、ＬＥＤドライバ３３、およびＬＥＤ４１を含む。 FIG. 4 is a block diagram showing various members included in the liquid crystal display device 69 (the LED 41 shown in FIG. 4 is one of a plurality of LEDs 41). As shown in FIG. 4, the liquid crystal display device 69 includes a receiving unit 31, a video signal processing unit (control unit) 11, a liquid crystal display panel controller 32, an LED controller 21, an LED driver 33, and an LED 41.
　受信部３１は、例えば、テレビの放送信号（白色矢印参照）のような映像音声信号を受信する（なお、以降では、映像音声信号に含まれる映像信号について主体的に説明していく）。そして、受信部３１は、受信した映像信号を映像信号処理部１１に送信する。 The receiving unit 31 receives a video / audio signal such as a television broadcast signal (see white arrow), for example (hereinafter, the video signal included in the video / audio signal will be mainly described). Then, the reception unit 31 transmits the received video signal to the video signal processing unit 11.
　なお、映像信号処理部１１に送信される映像信号を、便宜上、基礎映像信号（画像データ）とし、この基礎映像信号に含まれる色映像信号（基礎色映像信号）のうち、赤色を示す信号を基礎赤色映像信号ＦＲＳ、緑色を示す信号を基礎緑色映像信号ＦＧＳ、青色を示す信号を基礎青色映像信号ＦＢＳ、とする。 Note that the video signal transmitted to the video signal processing unit 11 is referred to as a basic video signal (image data) for convenience, and a signal indicating red among the color video signals (basic color video signals) included in the basic video signal. The basic red video signal FRS, the green signal is the basic green video signal FGS, and the blue signal is the basic blue video signal FBS.
　映像信号処理部１１は、内蔵メモリ１２と、処理制御部（制御部）１３とを含む。内蔵メモリ１２は、処理制御部１３による信号への補正処理に要するルックアップテーブル（図示せず）を記憶する。 The video signal processing unit 11 includes a built-in memory 12 and a processing control unit (control unit) 13. The built-in memory 12 stores a look-up table (not shown) required for signal correction processing by the processing control unit 13.
　処理制御部１３は、受信した基礎色映像信号（画像データ）に基づいて、加工映像信号を生成する。そして、処理制御部１３は、加工映像信号を、液晶表示パネルコントローラ３２とＬＥＤコントローラ２１とに送信する。 The process control unit 13 generates a processed video signal based on the received basic color video signal (image data). Then, the processing control unit 13 transmits the processed video signal to the liquid crystal display panel controller 32 and the LED controller 21.
　なお、加工映像信号は、例えば、基礎色映像信号（基礎赤色映像信号ＦＲＳ、基礎緑色映像信号ＦＧＳ、基礎青色映像信号ＦＢＳ等）を加工処理した加工色映像信号（加工赤色映像信号ＲＳ、加工緑色映像信号ＧＳ、加工青色映像信号ＢＳ）、および加工色映像信号に関する同期信号（クロック信号ＣＬＫ、垂直同期信号ＶＳ、水平同期信号ＨＳ等）である。 The processed video signal is, for example, a processed color video signal (processed red video signal RS, processed green) obtained by processing a basic color video signal (basic red video signal FRS, basic green video signal FGS, basic blue video signal FBS, etc.). A video signal GS, a processed blue video signal BS), and synchronization signals (clock signal CLK, vertical synchronization signal VS, horizontal synchronization signal HS, etc.) relating to the processed color video signal.
　ただし、液晶表示パネルコントローラ３２に送信される加工色映像信号と、ＬＥＤコントローラ２１に送信される加工色映像信号とは異なる。そこで、これらの加工色映像信号を区別すべく、液晶表示パネルコントローラ３２に送信される加工色映像信号を、パネル用加工赤色映像信号ＲＳｐ、パネル用加工緑色映像信号ＧＳｐ、パネル用加工青色映像信号ＢＳｐとする。 However, the processed color video signal transmitted to the liquid crystal display panel controller 32 and the processed color video signal transmitted to the LED controller 21 are different. Therefore, in order to distinguish these processed color video signals, the processed color video signals transmitted to the liquid crystal display panel controller 32 are processed panel red video signal RSp, processed green video signal GSp for panel, and processed blue video signal for panel. Let BSp.
　一方で、ＬＥＤコントローラ２１に送信される加工色映像信号（光源制御データ）を、光源用赤色映像信号ＲＳｄ、光源用緑色映像信号ＧＳｄ、光源用青色映像信号ＢＳｄとする。なお、詳説すると、光源用色映像信号（ＲＳｄ、ＧＳｄ、ＢＳｄ）は、適正な補正処理がされた後に、ＬＥＤコントローラ２１に送信される。 Meanwhile, the processed color video signal (light source control data) transmitted to the LED controller 21 is a light source red video signal RSd, a light source green video signal GSd, and a light source blue video signal BSd. More specifically, the light source color video signals (RSd, GSd, BSd) are transmitted to the LED controller 21 after appropriate correction processing.
　なお、光源用色映像信号（ＲＳｄ、ＧＳｄ、ＢＳｄ）とパネル用加工色映像信号（ＲＳｐ、ＧＳｐ、ＢＳｐ）とは、基礎色映像信号（ＦＲＳ、ＦＧＳ、ＦＢＳ）に対して以下のような関係を満たす。 The light source color video signals (RSd, GSd, BSd) and the panel processed color video signals (RSp, GSp, BSp) have the following relationship with respect to the basic color video signals (FRS, FGS, FBS). Meet.
　・　基礎赤色映像信号ＦＲＳ
　　＝パネル用加工赤色映像信号ＲＳｐ×光源用赤色映像信号ＲＳｄ
　・　基礎緑色映像信号ＦＧＳ
　　＝パネル用加工緑色映像信号ＧＳｐ×光源用緑色映像信号ＧＳｄ
　・　基礎青色映像信号ＦＢＳ
　　＝パネル用加工青色映像信号ＢＳｐ×光源用青色映像信号ＢＳｄ
　液晶表示パネルコントローラ３２は、パネル用加工赤色映像信号ＲＳｐ、パネル用加工緑色映像信号ＧＳｐ、パネル用加工青色映像信号ＢＳｐと、これら信号に関する同期信号とに基づいて、液晶表示パネル５９の画素を制御する。 ・ Basic red video signal FRS
= Panel processed red video signal RSp × Light source red video signal RSd
・ Basic green video signal FGS
= Panel processed green video signal GSp × Light source green video signal GSd
・ Basic blue video signal FBS
= Panel processing blue video signal BSp × light source blue video signal BSd
The liquid crystal display panel controller 32 controls the pixels of the liquid crystal display panel 59 based on the processed red video signal RSp for panel, the processed green video signal GSp for panel, the processed blue video signal BSp for panel, and the synchronization signals related to these signals. To do.
　ＬＥＤコントローラ２１は、ＬＥＤドライバ制御部２２とパルス幅変調部２３とを含む。 The LED controller 21 includes an LED driver control unit 22 and a pulse width modulation unit 23.
　ＬＥＤドライバ制御部２２は、映像信号処理部１１からの光源用色映像信号をパルス幅変調部２３に送信する。また、ＬＥＤドライバ制御部２２は、同期信号（クロック信号ＣＬＫ、垂直同期信号ＶＳ、水平同期信号ＨＳ等）からＬＥＤ４１（詳説すると、ＬＥＤチップ４２）の点灯タイミング信号ＴＳを生成して、ＬＥＤドライバ３３に送信する。 The LED driver control unit 22 transmits the light source color video signal from the video signal processing unit 11 to the pulse width modulation unit 23. Further, the LED driver control unit 22 generates a lighting timing signal TS of the LED 41 (specifically, the LED chip 42) from the synchronization signals (clock signal CLK, vertical synchronization signal VS, horizontal synchronization signal HS, etc.), and the LED driver 33. Send to.
　パルス幅変調部２３は、パルス幅変調（Pulse Width Modulation；ＰＷＭ）方式で、光源用色映像信号に基づいて、ＬＥＤ４１の発光時間を調整する。なお、このようなパルス幅変調に使用される信号値をＰＷＭ信号（ＰＷＭ値）と称する。また、パルス幅変調方式とは、周知であり、例えば、バックライトを１２０Ｈｚ（１秒間に１２０回点滅、周期８．３３ｍｓ）で駆動し、その８．３３ｍｓの期間を１２ｂｉｔ（４０９６）の分割幅で制御、変化させる方式のことである。 The pulse width modulation unit 23 adjusts the light emission time of the LED 41 based on the color video signal for the light source in a pulse width modulation (PWM) method. A signal value used for such pulse width modulation is referred to as a PWM signal (PWM value). The pulse width modulation method is well known. For example, the backlight is driven at 120 Hz (120 blinks per second, cycle 8.33 ms), and the period of 8.33 ms is divided into 12 bits (4096). It is a method of controlling and changing with.
　ＬＥＤドライバ３３は、ＬＥＤコントローラ２１からの信号（ＰＷＭ信号、タイミング信号）に基づいて、ＬＥＤ４１を点灯制御する。 The LED driver 33 controls lighting of the LED 41 based on a signal (PWM signal, timing signal) from the LED controller 21.
　ＬＥＤ４１は、上述したとおり、１個のＬＥＤチップ４２Ｒ（例えば第１の光源）、２個のＬＥＤチップ４２Ｇ（例えば第２の光源）、１個のＬＥＤチップ４２Ｂ（例えば第３の光源）を含む。そして、これらのＬＥＤチップ４２は、ＬＥＤドライバ３３によって、パルス幅変調方式で点灯制御される。 As described above, the LED 41 includes one LED chip 42R (for example, a first light source), two LED chips 42G (for example, a second light source), and one LED chip 42B (for example, a third light source). . These LED chips 42 are controlled to be turned on by the LED driver 33 by a pulse width modulation method.
　以上では、くさび形の導光板４３を敷き詰めたタンデム型バックライトユニット４９を例に挙げて説明してきた。しかし、これに限定されるものではない。例えば、図５に示すように、バックライトユニット４９では、光源であるＬＥＤ４１Ｒ、ＬＥＤ４１Ｇ、ＬＥＤ４１Ｇ、ＬＥＤ４１Ｂが集まって、混色で白色光を生成し、光学シート群（４５～４７）に対して、直接、光を出射させてもよい（なお、ＬＥＤ４１の後に付記されるＲＧＢは発光色を意味する）。すなわち、直下型のバックライトユニット４９であってもかまわない。 In the above description, the tandem backlight unit 49 in which the wedge-shaped light guide plate 43 is spread has been described as an example. However, it is not limited to this. For example, as shown in FIG. 5, in the backlight unit 49, the LED 41R, LED 41G, LED 41G, and LED 41B, which are light sources, gather to generate white light in a mixed color and directly to the optical sheet group (45 to 47). The light may be emitted (RGB added after the LED 41 means a light emission color). That is, a direct type backlight unit 49 may be used.
　また、以上では、受信部３１がテレビ放送信号のような映像音声信号を受信し、その信号における映像信号を、映像信号処理部１１が処理していた。そのため、このような液晶表示装置６９は、テレビ放送受信装置ともいえる。しかし、液晶表示装置６９が処理する映像信号は、テレビ放送に限定されるものではない。例えば、映画等のコンテンツを録画した記録媒体に含まれる映像信号や、インターネットを介して送信される映像信号であってもかまわない。 In the above description, the receiving unit 31 receives a video / audio signal such as a television broadcast signal, and the video signal processing unit 11 processes the video signal in the received signal. Therefore, it can be said that such a liquid crystal display device 69 is also a television broadcast receiver. However, the video signal processed by the liquid crystal display device 69 is not limited to television broadcasting. For example, it may be a video signal included in a recording medium on which content such as a movie is recorded or a video signal transmitted via the Internet.
　また、処理制御部１３は、通信ネットワークからの通信でデータ生成プログラムを取得してもよい。なお、通信ネットワークとしては、有線無線を問わず、インターネット、赤外線通等が挙げられる。 Further, the process control unit 13 may acquire the data generation program through communication from the communication network. The communication network includes the Internet, infrared communication, etc. regardless of wired wireless.
　ここで、ルックアップテーブルを用いた光源用色映像信号（ＲＳｄ、ＧＳｄ、ＢＳｄ）に対する補正処理について簡単に説明する。なお、この補正処理の施された光源用色映像信号（光量調整データ）は、光源用赤色映像信号ＲＳｄ’、光源用緑色映像信号ＧＳｄ’、光源用青色映像信号ＢＳｄ’と表記する（すなわち、補正処理された信号には「　’」を付す）。 Here, the correction process for the light source color video signals (RSd, GSd, BSd) using the lookup table will be briefly described. The light source color video signal (light quantity adjustment data) subjected to the correction processing is expressed as a light source red video signal RSd ′, a light source green video signal GSd ′, and a light source blue video signal BSd ′ (that is, The signal after the correction process is marked with “'”).
　通常、光源用色映像信号（ＲＳｄ、ＧＳｄ、ＢＳｄ）であるＰＷＭ値と、光源用色映像信号に応じて発光するＬＥＤチップ４２の輝度との関係は、正比例の関係になっていることが望ましい。しかしながら、実際は、ＬＥＤチップ４２の発光により生じる瞬間的な発熱の影響で、ＰＷＭ値とＬＥＤチップ４２の輝度とが、例えば１：１の正比例の関係にならない。そのため、このようなＬＥＤチップ４２を含むＬＥＤ４１からの白色光におけるＰＷＭ値とＬＥＤ４１による白色光の輝度との関係も、正比例の関係にはなりにくい。そこで、本液晶表示装置６９では、一例として、一般的なルックアップテーブルを用いて、輝度ズレを補償する構成を有している。 Usually, it is desirable that the relationship between the PWM value, which is the color image signal for light source (RSd, GSd, BSd), and the luminance of the LED chip 42 that emits light according to the color image signal for light source is a directly proportional relationship. . However, in actuality, the PWM value and the luminance of the LED chip 42 do not have a direct proportional relationship of 1: 1, for example, due to the instantaneous heat generation caused by the light emission of the LED chip 42. Therefore, the relationship between the PWM value of the white light from the LED 41 including the LED chip 42 and the brightness of the white light from the LED 41 is not easily proportional. In view of this, the present liquid crystal display device 69 has, for example, a configuration that compensates for the luminance shift using a general look-up table.
　なお、本液晶表示装置６９では、ＬＥＤコントローラ２１の内部に、処理制御部１３および内蔵メモリ１２が組み込まれており、その処理制御部１３（ひいてはＬＥＤコントローラ２１）が、パルス幅変調部２３から送信されてくる光源用色映像信号（ＲＳｄ、ＢＳｄ、ＧＳｄ）に対して、ルックアップテーブルを用いた補正処理を行い、補正処理後の光源用色映像信号（ＲＳｄ’、ＢＳｄ’、ＧＳｄ’）をＬＥＤドライバ３３に送信してもよい。 In the present liquid crystal display device 69, the processing controller 13 and the built-in memory 12 are incorporated in the LED controller 21, and the processing controller 13 (and thus the LED controller 21) transmits from the pulse width modulator 23. The light source color video signals (RSd, BSd, GSd) are subjected to correction processing using a lookup table, and the light source color video signals (RSd ′, BSd ′, GSd ′) after the correction processing are obtained. You may transmit to the LED driver 33. FIG.
　（バックライトユニットの構成）
　本液晶表示装置６９では、１枚の液晶表示パネル５９の全面に対応する１つの表示領域（全表示領域）が複数の領域（表示領域）に分割されており、各表示領域において互いに異なる画像を表示する。 (Configuration of backlight unit)
In the present liquid crystal display device 69, one display area (entire display area) corresponding to the entire surface of one liquid crystal display panel 59 is divided into a plurality of areas (display areas), and different images are displayed in each display area. indicate.
　液晶表示パネル５９は、例えば、図６に示すように、２つの表示領域（第１表示領域、第２表示領域）に分割されており、第１表示領域のアスペクト比（横縦比）が１６：９、第２表示領域のアスペクト比が５：９、第１および第２表示領域を合わせた全表示領域のアスペクト比が２１：９で構成されている。図６の液晶表示パネル５９の構成によれば、第１表示領域にフルＨＤ（Full High Definition）映像を縮小することなく表示しつつ、同時に、第２表示領域に他のコンテンツ（例えば、時刻、カレンダーなどの画像や、第１表示領域の映像に関連付けられた文字情報や、多チャンネルのテレビ映像など）を表示させることができる。 For example, as shown in FIG. 6, the liquid crystal display panel 59 is divided into two display areas (a first display area and a second display area), and the aspect ratio (aspect ratio) of the first display area is 16. : 9, the aspect ratio of the second display area is 5: 9, and the aspect ratio of the entire display area including the first and second display areas is 21: 9. According to the configuration of the liquid crystal display panel 59 of FIG. 6, a full HD (Full （High Definition) image is displayed in the first display region without being reduced, and at the same time, other contents (for example, time, An image such as a calendar, character information associated with an image in the first display area, a multi-channel television image, or the like can be displayed.
　なお、表示領域の分割数は２つに限定されるものではなく、３つあるいはそれ以上であってもよく、各表示領域のアスペクト比も上記の値に限定されるものではない。さらに、各表示領域が並べられる方向も左右方向（図６参照）に限定されず、上下方向に並べられていても良い。図１３は、液晶表示パネル５９の他の構成を示す模式図である。図１３の（ａ）の液晶表示パネル５９では、第１表示領域のアスペクト比が１６：９、第２表示領域のアスペクト比が１６：１、全表示領域のアスペクト比が１６：１０で構成されており、第１表示領域および第２表示領域が上下方向に並べられている。図１３の（ｂ）の液晶表示パネル５９では、さらに第３表示領域を含み、第１表示領域のアスペクト比が１６：９、第２表示領域のアスペクト比が５：９、第３表示領域のアスペクト比が２１：１、全表示領域のアスペクト比が２１：１０で構成されている。図１３の（ｂ）の構成によれば、第１表示領域にフルＨＤ映像を縮小することなく表示しつつ、同時に、第２表示領域および第３表示領域に、互いに異なるコンテンツを表示させることができる。 Note that the number of display area divisions is not limited to two, but may be three or more, and the aspect ratio of each display area is not limited to the above values. Furthermore, the direction in which the display areas are arranged is not limited to the horizontal direction (see FIG. 6), and may be arranged in the vertical direction. FIG. 13 is a schematic diagram showing another configuration of the liquid crystal display panel 59. In the liquid crystal display panel 59 of FIG. 13A, the aspect ratio of the first display area is 16: 9, the aspect ratio of the second display area is 16: 1, and the aspect ratio of the entire display area is 16:10. The first display area and the second display area are arranged in the vertical direction. The liquid crystal display panel 59 of FIG. 13B further includes a third display area, the aspect ratio of the first display area is 16: 9, the aspect ratio of the second display area is 5: 9, The aspect ratio is 21: 1, and the aspect ratio of the entire display area is 21:10. According to the configuration of FIG. 13B, it is possible to display different contents in the second display area and the third display area at the same time while displaying the full HD video in the first display area without reducing it. it can.
　本液晶表示装置６９では、バックライトユニット４９は、液晶表示パネル５９の各表示領域に対応して、表示領域ごとに異なる構成を有している。以下では、図６に示す液晶表示パネル５９に対応するバックライトユニット４９の具体的な構成例について説明する。また、バックライトユニット４９において、液晶表示パネル５９の第１表示領域に対応する領域に配置される光源を第１光源とし、第２表示領域に対応する領域に配置される光源を第２光源とする。 In the present liquid crystal display device 69, the backlight unit 49 has a different configuration for each display area corresponding to each display area of the liquid crystal display panel 59. Below, the specific structural example of the backlight unit 49 corresponding to the liquid crystal display panel 59 shown in FIG. 6 is demonstrated. In the backlight unit 49, the light source arranged in the area corresponding to the first display area of the liquid crystal display panel 59 is the first light source, and the light source arranged in the area corresponding to the second display area is the second light source. To do.
　（構成例１）
　図７は、構成例１に係るバックライトユニット４９の概略構成を示す平面図である。図７のバックライトユニット４９は、光源が液晶表示パネル５９の背面側に設けられた、いわゆる直下型のバックライトユニットであり、第１表示領域では、各ＬＥＤ４１（第１光源）が、１個の赤色発光（Ｒ）のＬＥＤチップ（以下、Ｒ－ＬＥＤチップともいう）４２Ｒ、１個の緑色発光（Ｇ）のＬＥＤチップ（以下、Ｇ－ＬＥＤチップともいう）４２Ｇ、および１個の青色発光（Ｂ）のＬＥＤチップ（以下、Ｂ－ＬＥＤチップともいう）４２Ｂで構成され、第２表示領域では、各ＬＥＤ４１（第２光源）が、３個の白色発光（Ｗ）のＬＥＤチップ（以下、Ｗ－ＬＥＤチップともいう）４２Ｗで構成されている。 (Configuration example 1)
FIG. 7 is a plan view showing a schematic configuration of the backlight unit 49 according to Configuration Example 1. FIG. The backlight unit 49 in FIG. 7 is a so-called direct type backlight unit in which a light source is provided on the back side of the liquid crystal display panel 59. In the first display area, one LED 41 (first light source) is provided. Red light emitting (R) LED chip (hereinafter also referred to as R-LED chip) 42R, one green light emitting (G) LED chip (hereinafter also referred to as G-LED chip) 42G, and one blue light emitting (B) LED chip (hereinafter also referred to as B-LED chip) 42B, and in the second display area, each LED 41 (second light source) has three white light emitting (W) LED chips (hereinafter referred to as 42W) (also called W-LED chip).
　このように、第１表示領域では、ＲＧＢの各ＬＥＤチップにより表示が行われるため、色再現範囲の広い表示を実現することができ、第２表示領域では、発光効率が高いＷ－ＬＥＤにより表示が行われるため、第１表示領域と比較して第２表示領域の消費電力を低減することができる。 As described above, since the display is performed by the RGB LED chips in the first display area, it is possible to realize a display with a wide color reproduction range, and in the second display area, the display is performed by the W-LED having high luminous efficiency. Therefore, the power consumption of the second display area can be reduced compared to the first display area.
　なお、バックライトユニット４９に設けられるＬＥＤ４１の数量は、第１表示領域および第２表示領域で特に限定されるものではなく、また、ＬＥＤ４１の配列ピッチは、第１表示領域および第２表示領域で同一であってもよいし、異なっていていてもよい。 The number of LEDs 41 provided in the backlight unit 49 is not particularly limited in the first display area and the second display area, and the arrangement pitch of the LEDs 41 is different in the first display area and the second display area. They may be the same or different.
　（構成例２）
　図８は、構成例２に係るバックライトユニット４９の概略構成を示す平面図である。図８のバックライトユニット４９は、光源（第１光源および第２光源）が液晶表示パネル５９の背面側に設けられ、第１および第２表示領域とも、各ＬＥＤ４１が、１個のＲ－ＬＥＤチップ４２Ｒ、１個のＧ－ＬＥＤチップ４２Ｇ、および１個のＢ－ＬＥＤチップ４２Ｂで構成されているが、各ＬＥＤ４１の配列ピッチが第１および第２表示領域で異なっている。例えば、図８に示すように、第１表示領域では、各ＬＥＤ４１が狭いピッチ（密）で配列され、第２表示領域では、各ＬＥＤ４１が広いピッチ（疎）で配列されている。 (Configuration example 2)
FIG. 8 is a plan view showing a schematic configuration of the backlight unit 49 according to Configuration Example 2. As shown in FIG. In the backlight unit 49 of FIG. 8, a light source (first light source and second light source) is provided on the back side of the liquid crystal display panel 59, and each LED 41 includes one R-LED in both the first and second display areas. The chip 42R is composed of one G-LED chip 42G and one B-LED chip 42B. The arrangement pitch of the LEDs 41 is different between the first and second display areas. For example, as shown in FIG. 8, in the first display area, the LEDs 41 are arranged at a narrow pitch (dense), and in the second display area, the LEDs 41 are arranged at a wide pitch (sparse).
　このように、第１表示領域では、各ＬＥＤ４１（第１光源）が密に配されているため高画質の表示を実現することができ、第２表示領域では、各ＬＥＤ４１（第２光源）が疎に配されているため、コストおよび消費電力を低減することができる。 As described above, the LEDs 41 (first light sources) are densely arranged in the first display area, so that high-quality display can be realized. In the second display area, the LEDs 41 (second light sources) Since it is sparsely arranged, cost and power consumption can be reduced.
　（構成例３）
　図９は、構成例３に係るバックライトユニット４９の概略構成を示す平面図である。図９のバックライトユニット４９は、第１表示領域では、Ｒ－ＬＥＤチップ４２Ｒ、Ｇ－ＬＥＤチップ４２Ｇ、Ｂ－ＬＥＤチップ４２Ｂで構成される複数のＬＥＤ４１（第１光源）が、液晶表示パネル５９の背面側にマトリクス状に配列され（直下型バックライトユニット）、第２表示領域では、Ｒ－ＬＥＤチップ４２Ｒ、Ｇ－ＬＥＤチップ４２Ｇ、Ｂ－ＬＥＤチップ４２Ｂで構成される複数のＬＥＤ４１（第２光源）が、液晶表示パネル５９の側面側に一列に配列されている（エッジ型バックライトユニット）。なお、第２表示領域に対応するＬＥＤ４１の数量は１つであってもよい。また、第２表示領域に対応する１つあるいは複数のＬＥＤ４１が、一方の側面側にのみ配されていてもよく、また、第２表示領域に対応する複数のＬＥＤ４１が、向かい合う両側面に互いに向かい合うように配されていてもよい。そして、第２表示領域のバックライトユニット４９は、液晶表示パネル５９の背面側に設けられた導光板（図示せず）の側面に入射した光が、導光板の天面から外部に出射する構成である。 (Configuration example 3)
FIG. 9 is a plan view showing a schematic configuration of the backlight unit 49 according to Configuration Example 3. As shown in FIG. In the first display area, the backlight unit 49 of FIG. 9 includes a plurality of LEDs 41 (first light sources) composed of an R-LED chip 42R, a G-LED chip 42G, and a B-LED chip 42B. In the second display area, a plurality of LEDs 41 (second LEDs) composed of R-LED chips 42R, G-LED chips 42G, and B-LED chips 42B Light sources) are arranged in a line on the side of the liquid crystal display panel 59 (edge type backlight unit). Note that the number of LEDs 41 corresponding to the second display area may be one. In addition, one or a plurality of LEDs 41 corresponding to the second display area may be arranged only on one side surface side, and the plurality of LEDs 41 corresponding to the second display area face each other on opposite side faces. It may be arranged as follows. The backlight unit 49 in the second display area is configured such that light incident on the side surface of a light guide plate (not shown) provided on the back side of the liquid crystal display panel 59 is emitted from the top surface of the light guide plate to the outside. It is.
　このように、第１表示領域では、バックライトユニット４９を直下型とすることにより、高画質の表示を実現することができ、第２表示領域では、バックライトユニット４９をエッジ型とすることにより、コストおよび消費電力を低減することができる。 As described above, in the first display area, the backlight unit 49 is a direct type, so that a high-quality display can be realized. In the second display area, the backlight unit 49 is an edge type. Cost and power consumption can be reduced.
　なお、第２表示領域に配される光源（第２光源）は、ＬＥＤに限定されるものではなく、ＣＣＦＬ（冷陰極管）、ＨＣＦＬ（熱陰極管）等の蛍光管を使用することもできる。 The light source (second light source) arranged in the second display area is not limited to the LED, and a fluorescent tube such as CCFL (cold cathode tube) or HCFL (hot cathode tube) can also be used. .
　（構成例４）
　図１０は、構成例４に係るバックライトユニット４９の概略構成を示す平面図である。図１０のバックライトユニット４９は、第１表示領域では、複数のＬＥＤ４１（第１光源）がマトリクス状に配列され、第２表示領域では、ＬＥＤとは異なる光源４１ｐ（第２光源）、例えばＣＣＦＬ、ＨＣＦＬ等の蛍光管が液晶表示パネル５９の背面側に配されている。 (Configuration example 4)
FIG. 10 is a plan view showing a schematic configuration of a backlight unit 49 according to Configuration Example 4. As shown in FIG. The backlight unit 49 of FIG. 10 includes a plurality of LEDs 41 (first light sources) arranged in a matrix in the first display area, and a light source 41p (second light source) different from the LEDs in the second display area, for example, CCFL. A fluorescent tube such as HCFL is disposed on the back side of the liquid crystal display panel 59.
　このように、第１表示領域では、ＲＧＢ－ＬＥＤを使用することにより、高画質の表示を実現することができ、第２表示領域では、ＣＣＦＬ、ＨＣＦＬ等を使用することにより、コストおよび消費電力を低減することができる。 In this way, high-quality display can be realized by using RGB-LEDs in the first display area, and cost and power consumption can be achieved by using CCFL, HCFL, etc. in the second display area. Can be reduced.
　（構成例５）
　第１表示領域と第２表示領域とで、光学シートの構成を異ならせても良い。例えば、第２表示領域の光学シートの指向性を第１表示領域のそれよりも高くする。また、第１表示領域にプリズムシートと呼ばれる輝度上昇フィルムを設けることにより、輝度を上昇させる構成としてもよい。なお、第２表示領域にはプリズムシートを設けないことによりコストの低減を図ることができる。これにより、第２表示領域では、低消費電力で所望の輝度を得ることができる。 (Configuration example 5)
The configuration of the optical sheet may be different between the first display area and the second display area. For example, the directivity of the optical sheet in the second display area is made higher than that in the first display area. Moreover, it is good also as a structure which raises a brightness | luminance by providing the brightness enhancement film called a prism sheet in a 1st display area. The cost can be reduced by not providing a prism sheet in the second display area. Thereby, in the second display area, desired luminance can be obtained with low power consumption.
　（構成例６）
　図１１は、構成例６に係るバックライトユニット４９の概略構成を示す平面図である。図１１に示すように、第１表示領域と第２表示領域との境界部分には光源（第１光源および第２光源）を配置しない構成とすることもできる。これにより、第１表示領域と第２表示領域とを光学的に分離するための隔壁６０を容易に形成することができる。そのため、第１表示領域および第２表示領域間の光漏れを防ぐことができるため、表示品位を高めることができる。 (Configuration example 6)
FIG. 11 is a plan view illustrating a schematic configuration of a backlight unit 49 according to Configuration Example 6. As illustrated in FIG. As shown in FIG. 11, a light source (a first light source and a second light source) may not be arranged at a boundary portion between the first display area and the second display area. Thereby, the partition wall 60 for optically separating the first display area and the second display area can be easily formed. Therefore, since light leakage between the first display area and the second display area can be prevented, display quality can be improved.
　（構成例７）
　図１４は、構成例７に係るバックライトユニット４９の概略構成を示す平面図である。図１４のバックライトユニット４９は、光源（第１光源および第２光源）が液晶表示パネル５９の背面側に設けられ、第１表示領域および第２表示領域ともに、各ＬＥＤ４１が、３個のＷ－ＬＥＤチップ４２Ｗで構成されているが、各Ｗ－ＬＥＤチップ４２Ｗのサイズが第１表示領域および第２表示領域で異なっている。一般に、ＬＥＤはチップサイズによって発光効率が異なり、スモールタイプ（小）、ミドルタイプ（中）、ラージタイプ（大）の３種類が存在し、ラージタイプが最も発光効率が高い。そこで、本構成例７では、例えば、第１表示領域にラージタイプのＷ－ＬＥＤチップ４２Ｗを設け、第２表示領域にミドルタイプ（中）あるいはスモールタイプ（小）のＷ－ＬＥＤチップ４２Ｗを設けた構成や、第１表示領域にミドルタイプ（中）のＷ－ＬＥＤチップ４２Ｗを設け、第２表示領域にスモールタイプ（小）のＷ－ＬＥＤチップ４２Ｗを設けた構成とすることができる。 (Configuration example 7)
FIG. 14 is a plan view showing a schematic configuration of a backlight unit 49 according to Configuration Example 7. As shown in FIG. In the backlight unit 49 of FIG. 14, light sources (first light source and second light source) are provided on the back side of the liquid crystal display panel 59, and each LED 41 includes three Ws in both the first display region and the second display region. -Although it is composed of LED chips 42W, the size of each W-LED chip 42W differs between the first display area and the second display area. In general, LEDs have different luminous efficiencies depending on the chip size, and there are three types: small type (small), middle type (medium), and large type (large), and the large type has the highest luminous efficiency. Therefore, in this configuration example 7, for example, a large type W-LED chip 42W is provided in the first display area, and a middle type (medium) or small type (small) W-LED chip 42W is provided in the second display area. Alternatively, a middle type (medium) W-LED chip 42W may be provided in the first display area, and a small type (small) W-LED chip 42W may be provided in the second display area.
　このように、第２表示領域に、第１表示領域よりも発光効率の低いＷ－ＬＥＤチップ４２Ｗを設けることにより、コストおよび消費電力を低減することができる。 Thus, by providing the W-LED chip 42W having lower luminous efficiency than the first display area in the second display area, cost and power consumption can be reduced.
　（構成例８）
　図１５は、構成例８に係るバックライトユニット４９の概略構成を示す平面図である。図１５のバックライトユニット４９は、光源（第１光源および第２光源）が液晶表示パネル５９の背面側に設けられ、第１および第２表示領域とも、各ＬＥＤ４１が、３個のＷ－ＬＥＤチップ４２Ｗで構成されているが、Ｗ－ＬＥＤチップ４２Ｗの蛍光体の構成が互いに異なっている。一般に、ＬＥＤは、蛍光体の構成上の違いによって発光効率および色再現性が異なり、発光効率は高いが色再現性が狭いタイプ、発光効率は低いが色再現性が広いタイプ（いわゆる高演色タイプ）がある。本構成例８では、第１表示領域には、鮮やかな表示が可能な高演色タイプのＷ－ＬＥＤチップ４２Ｗを設け、第２表示領域には、省消費電力を優先して発光効率が高いタイプのＷ－ＬＥＤチップ４２Ｗを設けた構成とすることができる。 (Configuration example 8)
FIG. 15 is a plan view illustrating a schematic configuration of a backlight unit 49 according to Configuration Example 8. As illustrated in FIG. In the backlight unit 49 of FIG. 15, the light source (first light source and second light source) is provided on the back side of the liquid crystal display panel 59, and each LED 41 includes three W-LEDs in both the first and second display areas. Although the chip 42W is configured, the configuration of the phosphor of the W-LED chip 42W is different from each other. In general, LEDs have different light emission efficiency and color reproducibility depending on the structure of the phosphor. The light emission efficiency is high but the color reproducibility is narrow. The light emission efficiency is low but the color reproducibility is wide (so-called high color rendering type). ) In this configuration example 8, the first display area is provided with a high color rendering type W-LED chip 42W capable of vivid display, and the second display area is a type with high light emission efficiency giving priority to power saving. The W-LED chip 42W can be provided.
　ここで、図５に示すバックライトユニット４９は、第１表示領域および第２表示領域を含んで一体型に形成されているが、本発明の液晶表示装置６９では、バックライトユニットが表示領域ごとに個別に形成され、これらのバックライトユニットが結合して、液晶表示パネル５９に対応する１つのバックライトユニットを構成していてもよい。 Here, the backlight unit 49 shown in FIG. 5 is integrally formed including the first display area and the second display area. However, in the liquid crystal display device 69 of the present invention, the backlight unit is provided for each display area. These backlight units may be combined individually to constitute one backlight unit corresponding to the liquid crystal display panel 59.
　また、上記の各構成例において、第１表示領域のバックライトユニット４９をエッジ型としてもよい。これにより、コストおよび消費電力をさらに低減することができる。 In each of the above configuration examples, the backlight unit 49 in the first display area may be an edge type. Thereby, cost and power consumption can be further reduced.
　〔実施の形態２〕
　本発明に係る実施の形態２について、図面を用いて説明すれば、以下のとおりである。 [Embodiment 2]
The following describes Embodiment 2 of the present invention with reference to the drawings.
　なお、以下の説明では、主に、実施の形態１に係る液晶表示装置６９との相違点について説明するものとし、実施の形態１で説明した各構成要素と同一の機能を有する構成要素には同一の番号を付し、その説明を省略する。 In the following description, differences from the liquid crystal display device 69 according to the first embodiment will be mainly described, and components having the same functions as the components described in the first embodiment will be described. The same number is attached | subjected and the description is abbreviate | omitted.
　本実施の形態に係る液晶表示装置６９は、１枚の液晶表示パネル５９に対応する１つの全表示領域が複数の表示領域に分割されており、各表示領域において互いに異なる画像を表示する機能（以下、「分割画面表示モード」という）、および、各表示領域を足し合わせた、液晶表示パネル５９の全面に対応する１つの表示領域（全表示領域）に１つの画像を表示する機能（以下、「全画面表示モード」という）を有するとともに、受信部３１が受信した映像信号に基づいて、分割画面表示モードおよび全画面表示モードを切り替える構成を有している。 In the liquid crystal display device 69 according to the present embodiment, one entire display area corresponding to one liquid crystal display panel 59 is divided into a plurality of display areas, and a function of displaying different images in each display area ( (Hereinafter referred to as “divided screen display mode”) and a function for displaying one image in one display area (all display areas) corresponding to the entire surface of the liquid crystal display panel 59, which is a sum of the display areas (hereinafter referred to as “display screen”). And a configuration for switching between the split screen display mode and the full screen display mode based on the video signal received by the receiving unit 31.
　分割画面表示モードおよび全画面表示モードの切り替え方法は、例えば以下の方法により実現可能である。すなわち、図４に示すように、映像信号処理部１１の処理制御部１３が、外部から受信した映像信号に基づいて、表示モード切替信号ＳＳＷを生成する。そして、処理制御部１３は、表示モード切替信号ＳＳＷを、液晶表示パネルコントローラ３２に送信する。液晶表示パネルコントローラ３２は、表示モード切替信号ＳＳＷに基づいて、液晶表示パネル５９（図１参照）の画素を制御して、対応する表示領域あるいは１つの全表示領域に画像を表示させる。 The switching method between the split screen display mode and the full screen display mode can be realized by the following method, for example. That is, as shown in FIG. 4, the processing control unit 13 of the video signal processing unit 11 generates the display mode switching signal SSW based on the video signal received from the outside. Then, the process control unit 13 transmits a display mode switching signal SSW to the liquid crystal display panel controller 32. The liquid crystal display panel controller 32 controls the pixels of the liquid crystal display panel 59 (see FIG. 1) based on the display mode switching signal SSW to display an image on the corresponding display area or one entire display area.
　液晶表示パネル５９は、例えば、図６に示すように、２つの表示領域（第１表示領域、第２表示領域）に分割されており、第１表示領域のアスペクト比（横縦比）が１６：９、第２表示領域のアスペクト比が５：９、第１および第２表示領域を合わせた全表示領域のアスペクト比が２１：９で構成されている。図６の液晶表示パネル５９の構成によれば、分割画面表示モードでは、実施の形態１と同様、第１表示領域にフルＨＤ（Full High Definition）映像を縮小することなく表示しつつ、同時に、第２表示領域には他のコンテンツ（例えば、時刻、カレンダーなどの画像や、第１表示領域の映像に関連付けられた文字情報や、多チャンネルのテレビ映像など）を表示させることができる。また、全画面表示モードでは、アスペクト比２１：９の映画コンテンツなどの映像を縮小することなく表示させることができる。そして、本液晶表示装置の構成では、例えばフルＨＤ映像を受信した場合には、分割画面表示モードで表示が行われ、映画コンテンツの映像を受信した場合には、全画面表示モードで表示が行われる。 For example, as shown in FIG. 6, the liquid crystal display panel 59 is divided into two display areas (a first display area and a second display area), and the aspect ratio (aspect ratio) of the first display area is 16. : 9, the aspect ratio of the second display area is 5: 9, and the aspect ratio of the entire display area including the first and second display areas is 21: 9. According to the configuration of the liquid crystal display panel 59 of FIG. 6, in the split screen display mode, as in the first embodiment, a full HD (Full High Definition) image is displayed in the first display area without being reduced, and at the same time, Other contents (for example, images such as time and calendar, character information associated with video in the first display area, multi-channel television video, etc.) can be displayed in the second display area. In the full screen display mode, it is possible to display a video such as movie content having an aspect ratio of 21: 9 without reducing it. In the configuration of the liquid crystal display device, for example, when full HD video is received, display is performed in the split screen display mode, and when video of movie content is received, display is performed in the full screen display mode. Is called.
　なお、図１３に示すように、表示領域の分割数は２つに限定されるものではなく、３つあるいはそれ以上であってもよく、各表示領域のアスペクト比も上記の値に限定されるものではない。 As shown in FIG. 13, the number of display area divisions is not limited to two, but may be three or more, and the aspect ratio of each display area is also limited to the above value. It is not a thing.
　本液晶表示装置６９では、実施の形態１と同様、バックライトユニット４９は、液晶表示パネル５９に対応して、表示領域ごとに異なる構成を有しており、上記実施の形態１に係る各構成例を適用することができる。 In the present liquid crystal display device 69, as in the first embodiment, the backlight unit 49 has a different configuration for each display area corresponding to the liquid crystal display panel 59, and each configuration according to the first embodiment described above. An example can be applied.
　ここで、本液晶表示装置６９では、分割画面表示モードおよび全画面表示モードを切り替えて表示を行う機能を有し、表示領域ごとにバックライトユニット４９の構成が異なっているため、分割画面表示モードから全画面表示モードに切り替えて表示を行った場合に、表示領域ごとに輝度差（表示ムラ）が生じるおそれがある。そこで、この表示領域ごとの輝度差を解消するための駆動方法について以下に説明する。 Here, the present liquid crystal display device 69 has a function of switching between the split screen display mode and the full screen display mode, and the configuration of the backlight unit 49 is different for each display area. When the display is switched from the full-screen display mode to the display, there is a possibility that a luminance difference (display unevenness) may occur for each display area. Therefore, a driving method for eliminating the luminance difference for each display area will be described below.
　（駆動方法１）
　バックライトユニット４９が、例えば図７に示した構成例１の構成を有する場合、すなわち、第１表示領域では、各ＬＥＤ４１（第１光源）が、１個のＲ－ＬＥＤチップ４２Ｒ、１個のＧ－ＬＥＤチップ４２Ｇ、および１個のＢ－ＬＥＤチップ４２Ｂで構成され、第２表示領域では、各ＬＥＤ４１（第２光源）が、３個のＷ－ＬＥＤチップ４２Ｗで構成されている場合、第１表示領域の表示輝度および色温度と、第２表示領域の表示輝度および色温度とが互いに等しくなるように、各ＬＥＤ４１の輝度を調整することにより輝度差を解消することができる。 (Driving method 1)
For example, when the backlight unit 49 has the configuration of the configuration example 1 shown in FIG. 7, that is, in the first display area, each LED 41 (first light source) includes one R-LED chip 42R, one In the second display area, each LED 41 (second light source) is composed of three W-LED chips 42W, each of which is composed of a G-LED chip 42G and one B-LED chip 42B. The brightness difference can be eliminated by adjusting the brightness of each LED 41 so that the display brightness and color temperature of one display area are equal to the display brightness and color temperature of the second display area.
　例えば、発光効率の高い第２表示領域のＬＥＤ４１の輝度を低く設定することにより、全体としての表示輝度を均一化することができる。 For example, by setting the luminance of the LED 41 in the second display region with high luminous efficiency low, the overall display luminance can be made uniform.
　（駆動方法２）
　バックライトユニット４９が、例えば図１４に示した構成例７の構成を有する場合、すなわち、第１表示領域および第２表示領域ともに、各ＬＥＤ４１が、３個のＷ－ＬＥＤチップ４２Ｗで構成され、各Ｗ－ＬＥＤチップ４２Ｗのサイズが第１表示領域および第２表示領域で異なっている構成では、各ＬＥＤ４１の発光効率を調整することにより輝度差を解消することができる。 (Driving method 2)
For example, when the backlight unit 49 has the configuration of the configuration example 7 shown in FIG. 14, that is, both the first display area and the second display area, each LED 41 is configured by three W-LED chips 42W. In the configuration in which the size of each W-LED chip 42W is different between the first display area and the second display area, the luminance difference can be eliminated by adjusting the light emission efficiency of each LED 41.
　例えば、第１表示領域にチップサイズが大きいＷ－ＬＥＤチップ４２Ｗが設けられている構成の場合、発光効率の高い第１表示領域の各Ｗ－ＬＥＤチップ４２Ｗの輝度と、第２表示領域の各Ｗ－ＬＥＤチップ４２Ｗの輝度とが等しくなるように、第１表示領域の各Ｗ－ＬＥＤチップ４２Ｗの輝度を低く設定する。これにより、全体としての表示輝度を均一化することができる。 For example, in the case where the W-LED chip 42W having a large chip size is provided in the first display area, the luminance of each W-LED chip 42W in the first display area having high luminous efficiency and each of the second display areas The brightness of each W-LED chip 42W in the first display area is set low so that the brightness of the W-LED chip 42W becomes equal. Thereby, the display brightness as a whole can be made uniform.
　なお、構成例８についても、上記の方法と同様に、第１表示領域の各Ｗ－ＬＥＤチップ４２Ｗの輝度と、第２表示領域の各Ｗ－ＬＥＤチップ４２Ｗの輝度とが等しくなるように、第１表示領域の各Ｗ－ＬＥＤチップ４２Ｗの輝度を低く設定することにより、全体としての表示輝度を均一化することができる。 In the configuration example 8, similarly to the above method, the brightness of each W-LED chip 42W in the first display area is equal to the brightness of each W-LED chip 42W in the second display area. By setting the brightness of each W-LED chip 42W in the first display area to be low, the display brightness as a whole can be made uniform.
　（駆動方法３）
　上記駆動方法１および２において、第１表示領域および第２表示領域の各ＬＥＤ４１の輝度調整を行わず、液晶表示パネル５９側で表示輝度の調整を行っても良い。具体的には、液晶表示パネルコントローラ３２（図４参照）が液晶表示パネル５９（図１参照）の画素を制御して、液晶の透過率をＲＧＢ画素ごとに調整することによって、全体としての表示輝度を均一化することができる。 (Driving method 3)
In the driving methods 1 and 2, the display brightness may be adjusted on the liquid crystal display panel 59 side without adjusting the brightness of the LEDs 41 in the first display area and the second display area. Specifically, the liquid crystal display panel controller 32 (see FIG. 4) controls the pixels of the liquid crystal display panel 59 (see FIG. 1) and adjusts the transmittance of the liquid crystal for each RGB pixel, thereby displaying the entire display The luminance can be made uniform.
　本発明の表示装置では、
　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
　上記バックライトは、上記第１表示領域に対応して、少なくとも赤色発光の発光ダイオード素子と、緑色発光の発光ダイオード素子と、青色発光の発光ダイオード素子と、を含む第１光源が複数配置され、
　上記第２表示領域に対応して、白色発光の発光ダイオード素子を含む第２光源が複数配置されている構成とすることもできる。 In the display device of the present invention,
The display panel includes at least a first display area and a second display area,
In the backlight, a plurality of first light sources including at least a red light emitting diode element, a green light emitting diode element, and a blue light emitting diode element are disposed corresponding to the first display area,
Corresponding to the second display area, a plurality of second light sources including white light emitting diode elements may be arranged.
　上記表示装置では、
　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
　上記バックライトにおいて、上記第１表示領域に対応して複数配置される第１光源の配列ピッチが、上記第２表示領域に対応して複数配置される第２光源の配列ピッチよりも小さい構成とすることもできる。 In the above display device,
The display panel includes at least a first display area and a second display area,
In the backlight, the arrangement pitch of a plurality of first light sources arranged corresponding to the first display area is smaller than the arrangement pitch of a plurality of second light sources arranged corresponding to the second display area. You can also
　上記表示装置では、
　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
　上記バックライトに含まれる上記第１表示領域に対応する第１光源は、上記表示パネルの背面側に配置され、
　上記バックライトに含まれる上記第２表示領域に対応する第２光源は、上記表示パネルの側面側に配置されている構成とすることもできる。 In the above display device,
The display panel includes at least a first display area and a second display area,
The first light source corresponding to the first display area included in the backlight is disposed on the back side of the display panel,
The second light source corresponding to the second display area included in the backlight may be arranged on the side surface side of the display panel.
　上記表示装置では、
　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
　上記バックライトに含まれる上記第１表示領域に対応する第１光源は、発光ダイオードで構成され、
　上記バックライトに含まれる上記第２表示領域に対応する第２光源は、蛍光管で構成することもできる。 In the above display device,
The display panel includes at least a first display area and a second display area,
The first light source corresponding to the first display area included in the backlight is composed of a light emitting diode,
The second light source corresponding to the second display area included in the backlight may be formed of a fluorescent tube.
　上記表示装置では、
　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
　上記バックライトに含まれる上記第２表示領域に対応する光学シートの指向性が、上記バックライトに含まれる上記第１表示領域に対応する光学シートの指向性よりも高い構成とすることもできる。 In the above display device,
The display panel includes at least a first display area and a second display area,
The directivity of the optical sheet corresponding to the second display area included in the backlight may be higher than the directivity of the optical sheet corresponding to the first display area included in the backlight.
　上記表示装置では、
　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
　上記バックライトに含まれる、上記第１表示領域に対応する第１光源および上記第２表示領域に対応する第２光源は、発光ダイオードで構成され、
　上記第１光源のサイズと、上記第２光源のサイズとが、互いに異なっている構成とすることもできる。 In the above display device,
The display panel includes at least a first display area and a second display area,
The first light source corresponding to the first display area and the second light source corresponding to the second display area included in the backlight are configured by light emitting diodes,
The size of the first light source and the size of the second light source may be different from each other.
　上記表示装置では、上記発光ダイオードは、白色光を発光する構成とすることもできる。 In the display device, the light-emitting diode may emit white light.
　上記表示装置では、
　上記バックライトは、全ての表示領域を足し合わせた上記表示パネルの全面に対応する全表示領域に１つの画像を表示する場合には、各表示領域の表示輝度が均一になるように構成することができる。 In the above display device,
The backlight is configured so that the display brightness of each display area is uniform when one image is displayed in the entire display area corresponding to the entire surface of the display panel obtained by adding all the display areas. Can do.
　これにより、全表示領域に１つの画像を表示する場合に表示領域ごとに生じる輝度差（表示ムラ）を解消することができる。 Thereby, it is possible to eliminate a luminance difference (display unevenness) that occurs in each display area when one image is displayed in the entire display area.
　上記表示装置では、
　上記表示パネルは、２以上の表示領域を有し、
　少なくとも１つの表示領域のアスペクト比が、１６：９である構成とすることもできる。 In the above display device,
The display panel has two or more display areas,
The aspect ratio of at least one display area may be 16: 9.
　上記の構成によれば、フルＨＤ（Full High Definition）映像を縮小することなく表示させることができる。 According to the above configuration, a full HD (Full High Definition) video can be displayed without being reduced.
　上記表示装置では、
　上記表示パネルは、第１表示領域と、第２表示領域とを含み、
　上記第１表示領域のアスペクト比が１６：９であり、上記第２表示領域のアスペクト比が５：９である構成とすることもできる。 In the above display device,
The display panel includes a first display area and a second display area,
The aspect ratio of the first display area may be 16: 9, and the aspect ratio of the second display area may be 5: 9.
　上記の構成によれば、第１表示領域にフルＨＤ（Full High Definition）映像を縮小することなく表示しつつ、同時に、第２表示領域には他のコンテンツ（例えば、時刻、カレンダーなどの画像や、第１表示領域の映像に関連付けられた文字情報や、多チャンネルのテレビ映像など）を表示させることができる。 According to the above configuration, a full HD (Full High Definition) video is displayed in the first display area without being reduced, and at the same time, other contents (for example, images such as time and calendar, , Character information associated with the video in the first display area, multi-channel television video, etc.) can be displayed.
　上記表示装置では、
　全ての表示領域を足し合わせた上記表示パネルの全面に対応する全表示領域のアスペクト比が、２１：９である構成とすることもできる。 In the above display device,
The aspect ratio of all the display areas corresponding to the entire surface of the display panel obtained by adding all the display areas may be 21: 9.
　上記の構成によれば、全ての表示領域を足し合わせた全表示領域に１つの映像を表示する場合（全画面表示モード）には、アスペクト比２１：９の映画コンテンツなどの映像を縮小することなく表示させることができる。 According to the above configuration, when one video is displayed in the entire display area obtained by adding up all the display areas (full screen display mode), the video such as movie content having an aspect ratio of 21: 9 is reduced. Can be displayed.
　上記表示装置では、
　上記表示パネルは、第１表示領域と、第２表示領域とを含み、
　上記第１表示領域のアスペクト比が１６：９であり、上記第２表示領域のアスペクト比が１６：１であり、全ての表示領域を足し合わせた上記表示パネルの全面に対応する全表示領域のアスペクト比が、１６：１０である構成とすることもできる。 In the above display device,
The display panel includes a first display area and a second display area,
The aspect ratio of the first display area is 16: 9, the aspect ratio of the second display area is 16: 1, and all display areas corresponding to the entire surface of the display panel including all display areas are added. An aspect ratio may be 16:10.
　上記表示装置では、各表示領域が、上記表示パネル面における左右方向あるいは上下方向に並べられている構成とすることもできる。 In the display device, the display areas may be arranged in the horizontal direction or the vertical direction on the display panel surface.
　また、本発明の表示装置の駆動方法では、
　上記分割画面表示モードでは、上記表示領域ごとに表示輝度が異なる一方、
　上記全画面表示モードでは、上記全表示領域で表示輝度が均一になるように、上記表示領域ごとに上記バックライトの輝度を調整する構成とすることもできる。 In the driving method of the display device of the present invention,
In the split screen display mode, the display brightness is different for each display area,
In the full screen display mode, the backlight brightness may be adjusted for each display area so that the display brightness is uniform in the entire display area.
　上記の方法によれば、分割画面表示モードから全画面表示モードに切り替えて表示を行った場合に、表示領域ごとに生じる輝度差（表示ムラ）を解消することができる。 According to the above method, when the display is switched from the split screen display mode to the full screen display mode, the luminance difference (display unevenness) generated for each display area can be eliminated.
　上記表示装置の駆動方法では、
　上記分割画面表示モードでは、上記表示領域ごとに表示輝度が異なる一方、
　上記全画面表示モードでは、上記全表示領域で表示輝度が均一となるように、上記表示領域ごとに、液晶の透過率を調整する構成とすることもできる。 In the driving method of the display device,
In the split screen display mode, the display brightness is different for each display area,
In the full screen display mode, the liquid crystal transmittance may be adjusted for each display area so that the display luminance is uniform in the entire display area.
　上記の方法によれば、分割画面表示モードから全画面表示モードに切り替えて表示を行った場合に、表示領域ごとに生じる輝度差（表示ムラ）を解消することができる。 According to the above method, when the display is switched from the split screen display mode to the full screen display mode, the luminance difference (display unevenness) generated for each display area can be eliminated.
　本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。 The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.
　本発明の表示装置は、携帯電話、ＰＤＡ等のモバイル機器、ＴＶ等の各種用途に好適に用いることができる。 The display device of the present invention can be suitably used for various applications such as mobile devices such as mobile phones and PDAs, and TVs.
１１　　映像信号処理部
１２　　内蔵メモリ
１３　　処理制御部
２１　　ＬＥＤコントローラ
２２　　ＬＥＤドライバ制御部
２３　　パルス幅変調部
３１　　受信部
３２　　液晶表示パネルコントローラ
３３　　ＬＥＤドライバ
４１　　ＬＥＤ（第１光源、第２光源）
４１Ｒ　赤色発光のＬＥＤ
４１Ｇ　緑色発光のＬＥＤ
４１Ｂ　青色発光のＬＥＤ
４２Ｒ　赤色発光のＬＥＤチップ（赤色発光の発光ダイオード素子）
４２Ｇ　緑色発光のＬＥＤチップ（緑色発光の発光ダイオード素子）
４２Ｂ　青色発光のＬＥＤチップ（青色発光の発光ダイオード素子）
４２Ｗ　白色発光のＬＥＤチップ（白色発光の発光ダイオード素子）
４９　　バックライトユニット（バックライト）
５９　　液晶表示パネル
６０　　隔壁
６９　　液晶表示装置 11 Video signal processing unit 12 Built-in memory 13 Processing control unit 21 LED controller 22 LED driver control unit 23 Pulse width modulation unit 31 Reception unit 32 Liquid crystal display panel controller 33 LED driver 41 LED (first light source, second light source)
41R Red LED
41G green LED
41B Blue LED
42R Red LED chip (red LED element)
42G Green LED chip (Green LED)
42B Blue light emitting LED chip (light emitting diode element emitting blue light)
42W white light emitting LED chip (white light emitting diode element)
49 Backlight unit (backlight)
59 Liquid crystal display panel 60 Bulkhead 69 Liquid crystal display device

Claims (17)

  1. 　複数の表示領域を有する表示パネルと、該表示パネルに光を照射するバックライトとを備えた表示装置であって、
    　上記バックライトは、上記表示領域ごとに異なる画像を表示する場合には、上記表示領域ごとに表示輝度が異なるように構成されていることを特徴とする表示装置。     A display device comprising a display panel having a plurality of display areas, and a backlight for irradiating the display panel with light,
    The display device is configured such that when a different image is displayed for each display area, the display brightness is different for each display area.
  2. 　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
    　上記バックライトは、上記第１表示領域に対応して、少なくとも赤色発光の発光ダイオード素子と、緑色発光の発光ダイオード素子と、青色発光の発光ダイオード素子と、を含む第１光源が複数配置され、
    　上記第２表示領域に対応して、白色発光の発光ダイオード素子を含む第２光源が複数配置されていることを特徴とする請求項１に記載の表示装置。     The display panel includes at least a first display area and a second display area,
    In the backlight, a plurality of first light sources including at least a red light emitting diode element, a green light emitting diode element, and a blue light emitting diode element are disposed corresponding to the first display area,
    2. The display device according to claim 1, wherein a plurality of second light sources including white light emitting diode elements are arranged corresponding to the second display region.
  3. 　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
    　上記バックライトにおいて、上記第１表示領域に対応して複数配置される第１光源の配列ピッチが、上記第２表示領域に対応して複数配置される第２光源の配列ピッチよりも小さいことを特徴とする請求項１に記載の表示装置。     The display panel includes at least a first display area and a second display area,
    In the backlight, an arrangement pitch of a plurality of first light sources arranged corresponding to the first display area is smaller than an arrangement pitch of a plurality of second light sources arranged corresponding to the second display area. The display device according to claim 1.
  4. 　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
    　上記バックライトに含まれる上記第１表示領域に対応する第１光源は、上記表示パネルの背面側に配置され、
    　上記バックライトに含まれる上記第２表示領域に対応する第２光源は、上記表示パネルの側面側に配置されていることを特徴とする請求項１に記載の表示装置。     The display panel includes at least a first display area and a second display area,
    The first light source corresponding to the first display area included in the backlight is disposed on the back side of the display panel,
    The display device according to claim 1, wherein the second light source corresponding to the second display area included in the backlight is arranged on a side surface side of the display panel.
  5. 　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
    　上記バックライトに含まれる上記第１表示領域に対応する第１光源は、発光ダイオードで構成され、
    　上記バックライトに含まれる上記第２表示領域に対応する第２光源は、蛍光管で構成されていることを特徴とする請求項１に記載の表示装置。     The display panel includes at least a first display area and a second display area,
    The first light source corresponding to the first display area included in the backlight is composed of a light emitting diode,
    The display device according to claim 1, wherein the second light source corresponding to the second display area included in the backlight is formed of a fluorescent tube.
  6. 　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
    　上記バックライトに含まれる上記第２表示領域に対応する光学シートの指向性が、上記バックライトに含まれる上記第１表示領域に対応する光学シートの指向性よりも高いことを特徴とする請求項１に記載の表示装置。     The display panel includes at least a first display area and a second display area,
    The directivity of the optical sheet corresponding to the second display area included in the backlight is higher than the directivity of the optical sheet corresponding to the first display area included in the backlight. The display device according to 1.
  7. 　上記表示パネルは、少なくとも、第１表示領域と、第２表示領域とを含み、
    　上記バックライトに含まれる、上記第１表示領域に対応する第１光源および上記第２表示領域に対応する第２光源は、発光ダイオードで構成され、
    　上記第１光源のサイズと、上記第２光源のサイズとが、互いに異なっていることを特徴とする請求項１に記載の表示装置。     The display panel includes at least a first display area and a second display area,
    The first light source corresponding to the first display area and the second light source corresponding to the second display area included in the backlight are configured by light emitting diodes,
    The display device according to claim 1, wherein a size of the first light source and a size of the second light source are different from each other.
  8. 　上記発光ダイオードは、白色光を発光することを特徴とする請求項７に記載の表示装置。 The display device according to claim 7, wherein the light emitting diode emits white light.
  9. 　上記バックライトは、全ての表示領域を足し合わせた上記表示パネルの全面に対応する全表示領域に１つの画像を表示する場合には、各表示領域の表示輝度が均一になるように構成されていることを特徴とする請求項１に記載の表示装置。 The backlight is configured so that the display brightness of each display area is uniform when one image is displayed in the entire display area corresponding to the entire surface of the display panel obtained by adding all the display areas. The display device according to claim 1, wherein:
  10. 　上記表示パネルは、２以上の表示領域を有し、
    　少なくとも１つの表示領域のアスペクト比が、１６：９であることを特徴とする請求項１～９の何れか１項に記載の表示装置。     The display panel has two or more display areas,
    The display device according to any one of claims 1 to 9, wherein an aspect ratio of at least one display region is 16: 9.
  11. 　上記表示パネルは、第１表示領域と、第２表示領域とを含み、
    　上記第１表示領域のアスペクト比が１６：９であり、上記第２表示領域のアスペクト比が５：９であることを特徴とする請求項１～９の何れか１項に記載の表示装置。     The display panel includes a first display area and a second display area,
    10. The display device according to claim 1, wherein the aspect ratio of the first display area is 16: 9, and the aspect ratio of the second display area is 5: 9.
  12. 　全ての表示領域を足し合わせた上記表示パネルの全面に対応する全表示領域のアスペクト比が、２１：９であることを特徴とする請求項１０または１１に記載の表示装置。 12. The display device according to claim 10, wherein an aspect ratio of all display areas corresponding to the entire surface of the display panel obtained by adding all display areas is 21: 9.
  13. 　上記表示パネルは、第１表示領域と、第２表示領域とを含み、
    　上記第１表示領域のアスペクト比が１６：９であり、上記第２表示領域のアスペクト比が１６：１であり、全ての表示領域を足し合わせた上記表示パネルの全面に対応する全表示領域のアスペクト比が、１６：１０であることを特徴とする請求項１～９の何れか１項に記載の表示装置。     The display panel includes a first display area and a second display area,
    The aspect ratio of the first display area is 16: 9, the aspect ratio of the second display area is 16: 1, and all display areas corresponding to the entire surface of the display panel including all display areas are added. The display device according to any one of claims 1 to 9, wherein an aspect ratio is 16:10.
  14. 　各表示領域が、上記表示パネル面における左右方向あるいは上下方向に並べられていることを特徴とする請求項１０に記載の表示装置。 The display device according to claim 10, wherein the display areas are arranged in a horizontal direction or a vertical direction on the display panel surface.
  15. 　複数の表示領域を有する表示パネルと、該表示パネルに光を照射するバックライトとを備えた表示装置の駆動方法であって、
    　上記バックライトは、上記表示領域ごとに表示輝度が異なるように構成されており、
    　上記表示領域ごとに異なる画像を表示する分割画面表示モードと、全ての表示領域を足し合わせた上記表示パネルの全面に対応する全表示領域に１つの画像を表示する全画面表示モードとを含み、
    　外部から入力された映像信号に基づいて、上記分割画面表示モードおよび上記全画面表示モードを相互に切り替えることを特徴とする表示装置の駆動方法。     A display device driving method comprising a display panel having a plurality of display areas and a backlight for irradiating the display panel with light,
    The backlight is configured to have different display brightness for each display area,
    A split screen display mode for displaying different images for each display region, and a full screen display mode for displaying one image in the entire display region corresponding to the entire surface of the display panel obtained by adding all the display regions,
    A display device driving method, wherein the divided screen display mode and the full screen display mode are switched to each other based on a video signal input from the outside.
  16. 　上記分割画面表示モードでは、上記表示領域ごとに表示輝度が異なる一方、
    　上記全画面表示モードでは、上記全表示領域で表示輝度が均一になるように、上記表示領域ごとに上記バックライトの輝度を調整することを特徴とする請求項１５に記載の表示装置の駆動方法。     In the split screen display mode, the display brightness is different for each display area,
    16. The method of driving a display device according to claim 15, wherein in the full screen display mode, the luminance of the backlight is adjusted for each display region so that the display luminance is uniform in the entire display region. .
  17. 　上記分割画面表示モードでは、上記表示領域ごとに表示輝度が異なる一方、
    　上記全画面表示モードでは、上記全表示領域で表示輝度が均一となるように、上記表示領域ごとに、液晶の透過率を調整することを特徴とする請求項１５に記載の表示装置の駆動方法。     In the split screen display mode, the display brightness is different for each display area,
    16. The method of driving a display device according to claim 15, wherein, in the full screen display mode, the transmittance of the liquid crystal is adjusted for each display area so that display luminance is uniform in the entire display area. .
PCT/JP2011/079605 2010-12-28 2011-12-21 Display device and drive method for same WO2012090809A1 (en)

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