WO2010035562A1 - 光量調整装置、バックライトユニット、液晶表示パネル、および液晶表示装置 - Google Patents
光量調整装置、バックライトユニット、液晶表示パネル、および液晶表示装置 Download PDFInfo
- Publication number
- WO2010035562A1 WO2010035562A1 PCT/JP2009/062058 JP2009062058W WO2010035562A1 WO 2010035562 A1 WO2010035562 A1 WO 2010035562A1 JP 2009062058 W JP2009062058 W JP 2009062058W WO 2010035562 A1 WO2010035562 A1 WO 2010035562A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid crystal
- light
- crystal display
- electrode
- polymer dispersed
- Prior art date
Links
Images
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
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
- G02F1/13476—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which at least one liquid crystal cell or layer assumes a scattering state
-
- 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
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- 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
Definitions
- the present invention relates to a light amount adjusting device, a backlight unit, a liquid crystal display panel, and a liquid crystal display device.
- FIG. 12A a liquid crystal unit in which a light guide plate 151 that receives light from a light source 121 and converts the light into planar light is filled with a polymer-dispersed liquid crystal 111 (see FIGS. 12B and 12C).
- a backlight unit (light quantity adjustment device) 129 that covers ut has been developed (see Patent Document 1).
- the polymer dispersed liquid crystal 111 is sandwiched between the transparent electrode te1 and the transparent electrode te2, as shown in FIGS. 12B and 12C which are enlarged views of FIG. 12A.
- the voltage is also applied to the polymer dispersed liquid crystal 111 by the voltage applied to the transparent electrode te1 and the transparent electrode te2.
- the liquid crystal 112 in the polymer-dispersed liquid crystal 111 specifically, the liquid crystal molecules 113 in the liquid crystal 112 behave differently depending on the applied voltage as shown in FIGS. 12B and 12C.
- a white arrow indicates incident light to the liquid crystal unit ut, and a colored arrow indicates light emitted from the liquid crystal unit ut).
- the orientation of the linear liquid crystal molecules 113 becomes irregular (random), and the light from the light guide plate 151 Is diffused (scattered).
- the linear liquid crystal molecules 113 are regularly directed in one direction (electric field direction) and do not diffuse the light from the light guide plate 151.
- the amount of light that passes through the liquid crystal unit ut varies depending on the behavior of such light. More specifically, when only a relatively low voltage is applied to the polymer dispersed liquid crystal 111, light incident on the polymer dispersed liquid crystal 111 is diffused by the liquid crystal molecules 113 and directed toward the liquid crystal display panel 139 (see FIG. 12A). The amount of emitted light is small. On the other hand, when a relatively high voltage is applied to the polymer dispersed liquid crystal 111, the light incident on the polymer dispersed liquid crystal 111 travels without being diffused by the liquid crystal molecules 113 and is directed toward the liquid crystal display panel 139. A large amount of light is emitted.
- the backlight unit 129 can change the brightness of the emitted light (backlight light) without changing the brightness (light quantity) of the light source 121.
- the present invention has been made to solve the above problems.
- the object is to provide a light amount adjustment device (for example, a backlight unit or a liquid crystal display panel) that can effectively use light, and an electronic device (for example, a liquid crystal display device) that includes such a light amount adjustment device. .
- the light amount adjusting device is sandwiched between a first substrate including a first electrode to which a voltage is applied, a second substrate including a second electrode to which a voltage is applied, and the first electrode and the second electrode.
- a polymer-dispersed liquid crystal that aligns liquid crystal molecules in the direction of the electric field between the electrodes in accordance with an increase in voltage; a light source that supplies light to the polymer-dispersed liquid crystal from the interval between the first electrode and the second electrode; including.
- the amount of light traveling to the outside can be adjusted in accordance with the voltage applied to the polymer dispersed liquid crystal.
- the light quantity device is a backlight unit mounted on, for example, a liquid crystal display device
- a member that transmits light from the light source before reaching the liquid crystal display panel is mainly only a polymer dispersion type liquid crystal. . Therefore, the main cause of the loss of light from the light source is only the polymer dispersed liquid crystal.
- such a light amount adjusting device improves the effective utilization efficiency of light (in short, this light amount adjusting device supplies light to the outside while suppressing light loss).
- At least one of the first electrode and the second electrode includes a plurality of electrode pieces densely arranged in a planar shape, and the plurality of electrode pieces may be individually applied with a voltage.
- the applied voltage to each electrode piece is different, and the applied voltage to the polymer dispersed liquid crystal in contact with the electrode piece is also different. Therefore, the orientation of the liquid crystal molecules varies depending on the electrode pieces, and the amount of emitted light varies in part for each part of the first substrate or the like overlapping the electrode pieces. That is, the light amount of the planar light from the first substrate or the like is controlled for each part of the surface.
- the voltage applied to the polymer dispersed liquid crystal is higher as it is closer to the light source.
- the liquid crystal molecules in the polymer dispersion type liquid crystal close to the light source follow the electric field direction and diffuse only a small amount of light. Therefore, excessive light is not emitted from the polymer dispersed liquid crystal close to the light source. As a result, luminance unevenness is not included in the light from the light amount adjusting device.
- the density of the liquid crystal with respect to the polymer in the polymer dispersed liquid crystal may be lower as it is closer to the light source.
- the light amount adjusting device there is a backlight unit in a liquid crystal display device or a liquid crystal display panel.
- a liquid crystal display device including a backlight unit that is such a light amount adjusting device and a liquid crystal display panel that receives light from the backlight unit can also be said to be the present invention.
- a liquid crystal display device equipped with a liquid crystal display panel which is a light amount adjusting device can also be said to be the present invention.
- the light from the light source mainly passes through the polymer-dispersed liquid crystal and is emitted to the outside without passing through another member (for example, a light guide plate). Therefore, the light quantity adjusting device and the like according to the present invention improve the effective utilization efficiency of light.
- FIG. 3 is a cross-sectional view of the liquid crystal display device (the cross-sectional direction is the direction of arrow A-A ′ in FIG. 2).
- FIG. 3 is an exploded perspective view simply showing a liquid crystal display device.
- These are sectional views of a liquid crystal display device including a polymer dispersed liquid crystal to which a relatively high voltage is applied.
- These are sectional views of a liquid crystal display device including a polymer dispersed liquid crystal to which a relatively low voltage is applied.
- FIG. 1 is a cross-sectional view of the liquid crystal display device (the cross-sectional direction is the direction of arrow A-A ′ in FIG. 2).
- FIG. 3 is an exploded perspective view simply showing a liquid crystal display device.
- These are
- FIG. 6 is a cross-sectional view illustrating a liquid crystal display panel in addition to the backlight unit illustrated in FIG. 5.
- FIG. 3 is a cross-sectional view of a liquid crystal display device including a single sheet-like first transparent electrode. These are sectional views of a liquid crystal display device in which the applied voltage to the polymer dispersed liquid crystal is partially different. These are sectional drawings of the liquid crystal display device which made the density of the liquid crystal low as a part of the polymer dispersed liquid crystal near the LED. These are sectional views of a liquid crystal display device using a liquid crystal unit as a liquid crystal display panel. These are sectional drawings of the liquid crystal display device of a double-sided visual recognition type using a liquid crystal unit as a liquid crystal display panel.
- FIG. 1 These are sectional drawings of the conventional liquid crystal display device. These are sectional views of a conventional liquid crystal display device including a polymer dispersed liquid crystal to which a relatively low voltage is applied. These are sectional views of a conventional liquid crystal display device including a polymer dispersed liquid crystal to which a relatively high voltage is applied.
- FIG. 1 is a cross-sectional view of the liquid crystal display device 49
- FIG. 2 is an exploded perspective view simply showing the liquid crystal display device 49 (note that the cross-sectional direction of FIG. 1 is the direction of arrows AA ′ in FIG. Is).
- the liquid crystal display device 49 includes a liquid crystal display panel 39 and a backlight unit 29 that supplies light to the liquid crystal display panel 39 (note that the liquid crystal display panel 39 and the backlight unit 29 are included).
- Is also referred to as a light amount adjusting device in terms of adjusting the amount of light emitted
- a liquid crystal display device 49 equipped with the liquid crystal display panel 39 and the backlight unit 29 is also referred to as a light amount adjusting device).
- the liquid crystal display panel 39 adopts an active matrix method. Therefore, in this liquid crystal display panel 39, the liquid crystal 34 is composed of an active matrix substrate 32 to which an active element (switching element) such as a TFT (Thin Film Transistor) 31 is attached, and a counter substrate 33 facing the active matrix substrate 32. Sandwich. That is, the active matrix substrate 32 and the counter substrate 33 are substrates for sandwiching the liquid crystal 34 and are formed of transparent glass or the like.
- an active element switching element
- TFT Thin Film Transistor
- a sealing material SS1 is attached to the outer edge of the active matrix substrate 32 and the counter substrate 33, and the sealing material SS1 seals the liquid crystal 34.
- polarizing films PL and PL are attached so as to sandwich the active matrix substrate 32 and the counter substrate 33.
- a gate signal line GL, a source signal line SL, a TFT 31, and a pixel electrode 35 are formed on one side facing the counter substrate 33.
- the gate signal line GL is a line through which a gate signal (scanning signal) for controlling ON / OFF of the TFT 31 flows
- the source signal line SL is a line through which a source signal (image signal) required for image display flows.
- These both lines GL / SL are arranged in a line. More specifically, on the active matrix substrate 32, the gate signal lines GL arranged in a row intersect with the source signal lines SL arranged in a row, and both the lines GL and SL form a matrix pattern. A region divided by the gate signal line GL and the source signal line SL corresponds to a pixel of the liquid crystal display panel 39.
- a gate signal flowing through the gate signal line GL is generated by a gate driver (not shown), and a source signal flowing through the source signal line SL is generated by a source driver (not shown).
- the TFT 31 is located at the intersection of the gate signal line GL and the source signal line SL, and controls ON / OFF of each pixel in the liquid crystal display panel 39 (note that only a part of the TFT 31 is shown for convenience). That is, the TFT 31 controls ON / OFF of each pixel by the gate signal flowing through the gate signal line GL.
- the pixel electrode 35 is an electrode connected to the drain of the TFT 31 and is arranged corresponding to each pixel (that is, the pixel electrode 35 is spread in a matrix on the active matrix substrate 32).
- the pixel electrode 35 sandwiches the liquid crystal 34 together with a common electrode 36 described later.
- a common electrode 36 and a color filter 37 are formed on one side facing the active matrix substrate 32.
- the common electrode 36 is arranged corresponding to a plurality of pixels (that is, the common electrode 36 has an area that covers the plurality of pixels together on the counter substrate 33).
- the common electrode 36 sandwiches the liquid crystal 34 together with the pixel electrode 35.
- the color filter 37 is a filter that is interposed between the common electrode 36 and the counter substrate 33 and transmits light of a specific color.
- the color filter 37 of red (R), green (G), and blue (B) which are the three primary colors of light is mentioned. Further, these color filters 37 are arranged in, for example, a stripe shape, a delta shape, or a square shape.
- the source signal voltage in the source signal line SL is transmitted through the source / drain of the TFT 31. Is applied to the pixel electrode 35. Then, in accordance with the source signal voltage, the voltage of the source signal is written into a part of the liquid crystal 34 sandwiched between the pixel electrode 35 and the common electrode 36, that is, a part of the liquid crystal 34 corresponding to the pixel.
- the TFT 31 is OFF, the source signal voltage is held by the liquid crystal and the capacitor (not shown).
- the backlight unit 29 that supplies light to the liquid crystal display panel 39 will be described.
- the backlight unit 29 is positioned so as to be covered with the liquid crystal display panel 39, and includes an LED (Light Emitting Diode) 21, a liquid crystal unit UT, a reflection sheet 22, a diffusion sheet 23, and lens sheets 24 and 25.
- LED Light Emitting Diode
- LED21 is a light source and is arranged in a row in a plurality. More specifically, the LEDs 21 are located on the side surface of the liquid crystal unit UT, and are arranged in a line along the longitudinal direction of the side surface (note that this LED 21 is arranged in the X direction). Further, the LED 21 directs light to the liquid crystal unit UT by directing its light emitting end toward the liquid crystal unit UT.
- the liquid crystal unit UT converts light incident on the liquid crystal unit UT into planar light, and includes a polymer-dispersed liquid crystal 11, a light transmissive substrate PB, a sealing material SS2, and a transparent electrode TE.
- the polymer-dispersed liquid crystal 11 is a mixed material in which droplet-like liquid crystals (liquid crystal droplets) 12 are dispersed in the polymer 14 (note that the droplet-like liquid crystal 12 is phase-separated by the polymer 14).
- the polymer dispersed liquid crystal 11 when a voltage is applied, a plurality of linear (bar-shaped) liquid crystal molecules 13 included in the liquid crystal 12 are aligned in one direction. Therefore, the alignment vector of the liquid crystal molecules 13 is along one direction.
- the orientation vector of the liquid crystal molecules 13 becomes irregular (in short, the polymer dispersed liquid crystal 11 is The orientation vector of the liquid crystal molecules 13 is changed).
- linear liquid crystal molecules 13 are transparent, and proceed without diffusing the light incident substantially perpendicular to the direction of the liquid crystal molecules 13 (ie, the orientation vector). On the other hand, the linear liquid crystal molecules 13 diffuse light incident obliquely with respect to its direction in various directions.
- the first light transmissive substrate PB1 and the second light transmissive substrate PB2, which are light transmissive substrates PB, are light transmissive substrates such as glass, for example, and sandwich the polymer dispersed liquid crystal 11 therebetween.
- the sealing material SS2 closes the outer edge of the first light transmissive substrate PB1 and the second light transmissive substrate PB2 sandwiching the polymer dispersed liquid crystal 11. That is, the sealing material SS2 seals the polymer-dispersed liquid crystal 11 at an interval between the first light-transmitting substrate PB1 and the second light-transmitting substrate PB2.
- the material of the sealing material SS2 is not particularly limited, but is desirably formed of a transparent material that transmits light. This is because the sealing material SS2 is positioned on the side surface of the polymer dispersed liquid crystal 11, and light is incident on the sealing material SS2.
- the first transparent electrode TE1 and the second transparent electrode TE2 which are the transparent electrodes TE are light-transmitting electrodes formed of ITO (Indium Tin Oxide) or the like, and apply a voltage to the polymer dispersed liquid crystal 11. .
- the first transparent electrode TE1 is attached to one surface of the first light-transmitting substrate (first substrate) PB1 facing the polymer dispersed liquid crystal 11, and the second transparent electrode TE2 faces the polymer dispersed liquid crystal 11.
- the second transparent substrate (second substrate) PB2 is attached to one surface, and the transparent electrodes TE1 and TE2 face each other.
- the first transparent electrode TE1 and the second transparent electrode TE2 sandwich the polymer dispersed liquid crystal 11 while being in contact with the polymer dispersed liquid crystal 11 (therefore, the polymer dispersed liquid crystal is layered, and the polymer dispersed liquid crystal 11 is in contact with the polymer dispersed liquid crystal 11). Also referred to as a type liquid crystal layer 11).
- first transparent electrode (first electrode) TE1 includes a plurality of piece-like first transparent electrode pieces EP1, and these are arranged densely.
- second transparent electrode (second electrode) TE2 also includes a plurality of piece-like second transparent electrode pieces EP2, and these are arranged densely.
- the first transparent electrode piece EP1 and the second transparent electrode piece EP2 correspond to each pixel of the liquid crystal display panel 39 (in short, one first transparent electrode piece EP1 corresponds to one second transparent electrode piece EP2). And one pixel overlaps the first transparent electrode piece EP1).
- the densely arranged first transparent electrode pieces EP1 and second transparent electrode pieces EP2 are also arranged in a matrix shape (note that the first transparent electrode pieces EP1 and the second transparent electrode pieces EP1 and EP2 that are set by facing each other).
- the transparent electrode piece EP2 is also referred to as an electrode piece set ST).
- the light of the LED 21 is supplied to the polymer dispersed liquid crystal 11 from between the first transparent electrode TE1 and the second transparent electrode TE2. Note that light incident on the polymer dispersed liquid crystal 11 is emitted as planar light from the liquid crystal unit UT (particularly, the first light-transmitting substrate PB1), and details of the behavior of the light will be described later.
- the reflection sheet 22 is covered with the second light transmissive substrate PB2 in the liquid crystal unit UT.
- one surface facing the second light transmissive substrate PB2 is a reflection surface. For this reason, the reflection surface reflects the light that is about to leak from the liquid crystal unit UT by passing through the second light-transmitting substrate PB2 so as to return to the liquid crystal unit UT.
- the diffusion sheet 23 covers the first light-transmitting substrate PB1 in the liquid crystal unit UT, diffuses the emitted light (planar light) from the liquid crystal unit UT, and spreads the light throughout the liquid crystal display panel 49 (note that The diffusion sheet 23 and the lens sheets 24 and 25 are collectively referred to as an optical sheet group 26).
- the lens sheets 24 and 25 are, for example, optical sheets that have a prism shape in the sheet surface and narrow the directivity of light, and are positioned so as to cover the diffusion sheet 23. Therefore, the optical sheets 24 and 25 collect the light traveling from the diffusion sheet 23 and improve the light emission luminance per unit area. However, the divergence directions of the respective lights condensed by the optical sheet 24 and the optical sheet 25 are in a relation of crossing each other.
- this stacking direction is defined as the Y direction.
- a direction that intersects the Y direction and the X direction that is the arrangement direction of the LEDs 21 is defined as a Z direction (the XYZ direction may be orthogonal).
- the light from the LED 21 is emitted through the liquid crystal unit UT, and the emitted light passes through the optical sheet group 26. It is emitted as light with enhanced luminance (backlight). Further, the backlight light reaches the liquid crystal display panel 39, and the liquid crystal display panel 39 displays an image by the backlight light.
- the light emitted from the liquid crystal unit UT will be described in detail with reference to the cross-sectional views of FIGS. Specifically, how the light incident on the polymer dispersed liquid crystal 11 travels according to the level of the voltage applied to the polymer dispersed liquid crystal 11 will be described.
- “Hi” is given when the voltage applied to the polymer dispersed liquid crystal 11 is relatively high, while “Lo” is given when the voltage is relatively low (including the case of zero voltage).
- the electrode piece set ST closest to the LED 21 may be given member numbers ST2 and ST3 as the distance from the LED 21 is increased.
- “Li” is attached to a portion having a relatively high transmittance
- “Da” is attached to a portion having a relatively low transmittance.
- the transparent electrodes A relatively high voltage Hi is applied to the polymer-dispersed liquid crystal 11 sandwiched between TE1 and TE2, and the direction of the liquid crystal molecules 13 is in one direction as the applied voltage increases.
- the direction of the liquid crystal molecules 13 is along the direction of the electric field generated in the polymer dispersed liquid crystal 11. Therefore, in the direction from the first transparent electrode TE1 to the second transparent electrode TE2 that is the electric field direction ⁇ the parallel direction of the first transparent electrode TE1 and the second transparent electrode TE2 (the same direction as the Y direction) ⁇ Will be along.
- the light of the LED 21 enters from the side surface of the polymer dispersed liquid crystal 11, that is, from the interval between the first transparent electrode TE1 and the second transparent electrode TE2. Then, most of the light enters the liquid crystal molecules 13 aligned in the direction of the electric field substantially perpendicularly and further passes therethrough so as to travel without being diffused (see solid line arrows).
- the second light-transmitting substrate PB2 is also directed toward the reflection sheet 22.
- a large amount of light is not emitted). Therefore, only a small amount of light is emitted from the first light-transmitting substrate PB1 to the outside and reaches the diffusion sheet 23 (see colored arrows).
- the first transparent electrode TE1 and the second transparent electrode are not applied to the opposing transparent electrodes TE1 and TE2 or only a relatively low voltage of almost zero voltage is applied. If only a small potential is generated between the electrode TE2 and the polymer dispersed liquid crystal 11 sandwiched between the transparent electrodes TE1 and TE2, only a relatively low voltage Lo is applied, and the applied voltage (there may be zero voltage). ), The directions of the liquid crystal molecules 13 are irregular (random) without being aligned.
- a part of the light diffused by the liquid crystal molecules 13 is emitted from the second light-transmitting substrate PB2 toward the reflecting sheet 22, but is reflected by the reflecting sheet 22 so that the liquid crystal passes through the second light-transmitting substrate PB2.
- the light passes through the first light-transmitting substrate PB1 and proceeds to the diffusion sheet 23.
- the backlight unit 29 supplies light to the polymer-dispersed liquid crystal 11 that aligns the direction of the liquid crystal molecules 13 with the electric field direction to a relatively high degree as the applied voltage increases.
- the backlight unit 29 travels light substantially perpendicular to the electric field direction.
- the member that transmits the light of the LED 21 until it reaches the liquid crystal display panel 39 is the liquid crystal unit UT and the optical sheet group 26, and does not need to transmit a member such as a light guide plate (mainly, The liquid crystal unit UT becomes a light transmitting member). For this reason, the light of the LED 21 is unlikely to be lost before reaching the liquid crystal display panel 39 (in short, the loss of light is reduced by the smaller number of transmitting members). Therefore, such a backlight unit 29, and thus the liquid crystal display device 49, improves the effective utilization efficiency of light.
- the light from the liquid crystal unit UT is transmitted to the optical sheet group 26 after being adjusted to a required light quantity. Therefore, light diffusion and luminance improvement in the optical sheet group 26 are performed without excess or deficiency.
- the liquid crystal unit since there are a plurality of electrode piece sets ST that are the first transparent electrode piece EP1 and the second transparent electrode piece EP2 facing each other, if the applied voltage differs for each electrode piece set ST, the liquid crystal unit The amount of light emitted from the surface of the first light-transmissive substrate PB1 in the UT also varies depending on the electrode piece set ST. Therefore, as shown in FIGS. 3 and 4, it is not necessary that the applied voltage to the polymer dispersed liquid crystal 11 sandwiched between all the electrode piece sets ST is constant.
- the applied voltage may be different between adjacent electrode piece sets ST. That is, in the polymer dispersed liquid crystal 11 that is divided into a matrix according to the electrode piece set ST, different voltages may be applied to a part of the divided polymer dispersed liquid crystal 11.
- a relatively high voltage is applied to one electrode piece set ST, and a relatively low voltage is applied to the other electrode piece set ST.
- a relatively high voltage is applied to the electrode piece set ST1 closest to the LED 21.
- the light from the LED 21 first reaches the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1 to which a relatively high voltage is applied (see the white arrow).
- the liquid crystal molecules 13 are directed in the direction of the electric field generated between the first transparent electrode TE1 and the second transparent electrode TE2. For this reason, most of the light reaching the polymer-dispersed liquid crystal 11 is incident almost perpendicularly to the linear liquid crystal molecules 13 and further transmitted, so that it is sandwiched between the electrode piece sets ST2 without diffusing much. It progresses to the polymer dispersed liquid crystal 11 (see solid line arrow). Therefore, a relatively small amount of light is emitted from the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1 to the outside through the first light-transmitting substrate PB1 (see colored arrows).
- Electrode piece sets ST arranged in the electrode piece set ST3 so as to be separated from the LED 21.
- the backlight unit 29 including the liquid crystal unit UT in which a plurality of electrode piece sets ST are densely packed in a planar shape
- the electrode piece set ST is changed.
- the amount of emitted light for each part of the overlapping first light transmitting substrate PB1 also varies. That is, the light amount of the planar light from the backlight unit 29 is controlled for each part of the surface (so-called area control type backlight unit 29 is completed).
- the liquid crystal display device 49 equipped with such a backlight unit 29 not only the luminance adjustment is performed for each pixel (each area) in the liquid crystal display panel 39, but also the luminance adjustment for each area is performed in the backlight unit 29. It becomes possible.
- a relatively small amount of backlight light reaches a portion Da having a relatively low transmittance or a relatively high transmittance. It is preferable that a relatively large amount of backlight light reaches the portion Li that it has. With this configuration, it is possible to easily adjust the luminance while suppressing light loss.
- such a liquid crystal display device 49 can perform high-quality luminance adjustment (for example, a relatively high-quality contrast ratio), compared to the liquid crystal display device 49 that can only perform luminance adjustment using only the liquid crystal display panel 39. To provide high-quality images with excellent visibility.
- the first transparent electrode TE1 is constituted by the dense first transparent electrode pieces EP1
- the second transparent electrode TE2 is constituted by the dense second transparent electrode pieces EP2. That is, both the transparent electrodes TE1 and TE2 are configured by collecting the transparent electrode pieces EP1 and EP2.
- first transparent electrode TE1 and the second transparent electrode TE2 may be composed of a collection of transparent electrode pieces EP.
- a second transparent electrode TE2 configured by a plurality of second transparent electrode pieces EP2 and a first transparent electrode TE1 configured by a single electrode are provided. , You may face each other.
- the second transparent electrode piece EP2 and a part of the first transparent electrode TE1 opposed to the second transparent electrode piece EP2 serve as the electrode piece set ST and sandwich the polymer dispersed liquid crystal 11 therebetween.
- a voltage is applied to the type liquid crystal 11.
- the applied voltage to the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST varies depending on the applied voltage for each second transparent electrode piece EP2 (in short, each second transparent electrode The applied voltage to the piece EP2 is different, and the applied voltage to the polymer dispersed liquid crystal 11 in contact with the second transparent electrode piece EP2 is also different).
- the backlight unit 29 equipped with the liquid crystal unit UT including such an electrode piece set ST is an area control type backlight unit 29.
- the liquid crystal unit UT at least one of the first transparent electrode TE1 and the second transparent electrode TE2 has a plurality of electrode pieces EP densely arranged in a plane, and the plurality of electrode pieces EP are individually separated. If a voltage is applied, the backlight unit 29 on which the liquid crystal unit UT is mounted becomes an area control type backlight unit 29.
- the LED 21 supplies light from the side surface of the polymer dispersed liquid crystal 11
- the amount of light received by the part of the polymer dispersed liquid crystal 11 closer to the LED 21 increases. Therefore, the amount of light emitted from the liquid crystal unit UT becomes larger as a part of the liquid crystal unit UT closer to the LED 21.
- the amount of emitted light tends to be small. That is, when the light is incident from the side surface of the liquid crystal unit UT (edge light method), the light from the backlight unit 29 tends to include luminance unevenness (light intensity unevenness).
- the applied voltage to the polymer dispersed liquid crystal 11 may be partially different as shown in FIG. More specifically, when the voltage values applied to the polymer dispersion type liquid crystal 11 by the electrode piece sets ST1 to ST3 are Hi1 to Hi3, the magnitude relationship between these voltage values Hi1 to Hi3 is Hi1> Hi2> Hi3. Suppose that
- the amount of light that enters the liquid crystal molecules 13 substantially perpendicularly and passes therethrough becomes relatively large, and proceeds toward the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2 (see solid arrows). ). Therefore, the amount of light diffused in the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1 is small (see solid arrows). Then, excessive light is not emitted from a part of the liquid crystal unit UT corresponding to the electrode piece set ST1 (see colored arrows).
- the light that has not been diffused in the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1 travels toward the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2.
- the voltage Hi2 applied to the polymer dispersed liquid crystal 11 is lower than the voltage Hi1.
- the orientation of the liquid crystal molecules 13 is less likely to align with the electric field direction as compared to the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1. Accordingly, light is more easily diffused in the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2 than in the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1 (see solid arrows).
- the amount of light incident on the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2 is smaller than the amount of light incident on the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1. Therefore, even if the polymer-dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2 is more easily diffused than the polymer-dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1, the height of the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2 is high.
- the amount of light emitted from the molecular dispersion type liquid crystal 11 and the amount of light emitted from the polymer dispersion type liquid crystal 11 sandwiched between the electrode piece sets ST1 are likely to be approximately the same (see colored arrows).
- the amount of light incident on the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST3 is smaller than the amount of light incident on the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2, the amount of light emitted is excessive. Do not (see colored arrows). Therefore, the amount of light emitted from the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST3 and the amount of light emitted from the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2 tend to be approximately the same.
- the applied voltage to the polymer dispersed liquid crystal 11 is higher as it is closer to the LED 21, the amount of light diffused by the liquid crystal molecules 13 is reduced.
- the light of the LED 21 traveling through the polymer dispersed liquid crystal 11 is more likely to travel away from the LED 21 as the voltage applied to the polymer dispersed liquid crystal 11 is higher.
- the amount of light from a part of the liquid crystal unit UT close to the LED 21 does not increase excessively.
- the brightness unevenness is not included (of course, if the backlight light does not include the brightness unevenness, the display image of the liquid crystal display panel 39 does not have the brightness unevenness).
- a measure for preventing such luminance unevenness is not limited to partially changing the voltage applied to the polymer dispersed liquid crystal 11.
- brightness unevenness can also be prevented by adjusting the density of the liquid crystal 12 in the polymer 14.
- the polymer-dispersed liquid crystal 11 partially varies the density of the liquid crystal 12 (note that the density adjustment of the liquid crystal 12 is set by initial material adjustment). More specifically, as shown in FIG. 9, the density of the liquid crystal 12 is lower as the portion of the polymer dispersed liquid crystal 11 closer to the LED 21 (in other words, the portion of the polymer dispersed liquid crystal 11 that is farther from the LED 21 is higher in density. ).
- the density of the liquid crystal 12 of the polymer dispersion type liquid crystal 11 sandwiched between the electrode piece sets ST1 closest to the LED 21 Therefore, the amount of light diffused by the liquid crystal molecules 13 is also relatively small (see solid arrow). Accordingly, excessive light is not emitted from a part of the liquid crystal unit UT corresponding to the electrode piece set ST1 (see colored arrows).
- the light that has not been diffused in the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1 travels toward the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2.
- the density of the liquid crystal 12 of the polymer dispersed liquid crystal 11 is higher than the density of the liquid crystal 12 of the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1. Therefore, in the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2, light is more easily diffused than the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1 (see solid arrows).
- the amount of light incident on the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2 is smaller than the amount of light incident on the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1. Therefore, even if the polymer-dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2 is easier to diffuse light than the polymer-dispersed liquid crystal 11 sandwiched between the electrode piece sets ST1, the height of the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2 is high.
- the amount of light emitted from the molecular dispersion type liquid crystal 11 and the amount of light emitted from the polymer dispersion type liquid crystal 11 sandwiched between the electrode piece sets ST1 are likely to be approximately the same (see colored arrows).
- the amount of light incident on the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST3 is smaller than the amount of light incident on the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2, the amount of light emitted is excessive. Do not (see colored arrows). Therefore, the amount of light emitted from the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST3 and the amount of light emitted from the polymer dispersed liquid crystal 11 sandwiched between the electrode piece sets ST2 tend to be approximately the same.
- the density of the liquid crystal 12 with respect to the polymer 14 in the polymer dispersed liquid crystal 11 is lower as it is closer to the LED 21, the amount of light diffused by the liquid crystal molecules 13 is reduced.
- the light of the LED 21 traveling through the polymer-dispersed liquid crystal 11 is more likely to travel away from the LED 21 as the density of the liquid crystal 12 is lower.
- the liquid crystal unit close to the LED 21 is applied as in the case where the applied voltage to the polymer dispersed liquid crystal 11 is partially different.
- the amount of light from a part of the UT does not increase excessively, and as a result, luminance unevenness is not included in the backlight light.
- the liquid crystal unit UT in the backlight unit 29, is employed as a member for guiding the light of the LED 21.
- the liquid crystal unit UT can also be used as the liquid crystal display panel 39 in the liquid crystal display device 49.
- the liquid crystal display device 49 uses the liquid crystal unit UT as the liquid crystal display panel 39.
- the liquid crystal display device 49 includes a liquid crystal unit UT, an LED 21, a reflection sheet 22, and an optical sheet group 26 as a liquid crystal display panel 39.
- the liquid crystal unit UT adopts an active matrix system, similar to the liquid crystal display panel 39 described in the first embodiment. Therefore, in the liquid crystal unit UT, a second light-transmitting substrate PB2 to which an active element (not shown in FIG. 10) such as a TFT is attached, and a first light-transmitting substrate PB1 facing the second light-transmitting substrate PB2 Then, the polymer dispersed liquid crystal 11 is sandwiched.
- a gate signal line and a source signal line (both signal lines are not shown in FIG. 10) connected to the TFT are formed on one side facing the first light transmissive substrate PB1, A second transparent electrode TE2 is also formed.
- the region divided by the gate signal line and the source signal line corresponds to the pixel of the liquid crystal display panel 39, and the TFT located at the intersection of the gate signal line and the source signal line is a liquid crystal display. ON / OFF of each pixel in the display panel 39 is controlled.
- the second transparent electrode TE2 includes a plurality of second transparent electrode pieces EP2. And this 2nd transparent electrode piece EP2 is an electrode connected to the drain of each TFT, and is arrange
- the first transparent electrode TE1 and the color filter 37 are formed on the first light transmissive substrate PB1 on the one surface side facing the second light transmissive substrate PB2.
- the first transparent electrode TE1 includes a plurality of first transparent electrode pieces EP1 like the second transparent electrode TE2, and each of the first transparent electrode pieces EP1 is arranged corresponding to each pixel. Therefore, the first transparent electrode pieces EP1 are spread in a matrix on the first light-transmitting substrate PB1.
- the first transparent electrode TE1 composed of the dense first transparent electrode pieces EP1 sandwiches the polymer dispersed liquid crystal 11 together with the second transparent electrode TE2 of the second light-transmitting substrate PB2 (in short, one One first transparent electrode piece EP1 overlaps the second transparent electrode piece EP2, and the second transparent electrode piece EP2 and the first transparent electrode piece EP1 facing each other correspond to a pixel).
- the orientation of the liquid crystal molecules 13 of the polymer dispersed liquid crystal 11 is controlled using the potential difference (by the applied voltage).
- the color filter 37 is a filter that is interposed between the first transparent electrode TE1 and the first light-transmitting substrate PB1 and transmits light of a specific color.
- the color filter 37 of red (R), green (G), and blue (B), which are the three primary colors of light, can be cited as in the first embodiment.
- the source signal voltage in the source signal line is set to the second through the source / drain of the TFT. It is given to the transparent electrode TE2. Then, according to the source signal voltage, the source is supplied to a part of the polymer dispersed liquid crystal 11 sandwiched between the second transparent electrode TE2 and the first transparent electrode TE1, that is, a part of the polymer dispersed liquid crystal 11 corresponding to the pixel. The signal voltage is written. On the other hand, when the TFT is OFF, the source signal voltage is held by the polymer dispersed liquid crystal 11 and a capacitor (not shown).
- the LED 21 faces the side surface of the liquid crystal unit UT as described above, and supplies light to the polymer dispersed liquid crystal 11 from between the first light transmissive substrate PB1 and the second light transmissive substrate PB2.
- the reflection sheet 22 is positioned so as to be covered by the second light transmissive substrate PB2 in the liquid crystal unit UT. As in the first embodiment, the reflection sheet 22 reflects light that is about to leak from the liquid crystal unit UT by passing through the second light-transmitting substrate PB2 so as to return to the liquid crystal unit UT.
- the optical sheet group 26 covers the first light-transmitting substrate PB1 in the liquid crystal unit UT, diffuses outgoing light (planar light) from the liquid crystal unit UT, and displays a liquid crystal display. Light is spread throughout the panel 49 and the luminance is improved.
- liquid crystal display device 69 equipped with the liquid crystal unit UT as described above, first, light from the LED 21 enters the polymer dispersed liquid crystal 11.
- the amount of light emitted from the polymer dispersed liquid crystal 11 changes according to the voltage applied to the polymer dispersed liquid crystal 11 by the first transparent electrode TE1 and the second transparent electrode TE2.
- the direction of the linear liquid crystal molecules 13 is the electric field direction. , Most of the light enters the liquid crystal molecules 13 substantially perpendicularly and is transmitted. Therefore, the amount of light diffused by the liquid crystal molecules 13 is relatively small, and the amount of light emitted from the polymer dispersed liquid crystal 11 toward the outside is also reduced.
- a part of the light diffused by the liquid crystal molecules 13 is emitted from the second light-transmitting substrate PB2 toward the reflecting sheet 22, but is reflected by the reflecting sheet 22 so that the liquid crystal passes through the second light-transmitting substrate PB2.
- the light passes through the first light-transmitting substrate PB1 and proceeds to the diffusion sheet 23.
- the amount of light traveling to the outside of the liquid crystal unit UT can be adjusted according to the voltage applied to the polymer dispersed liquid crystal 11. Further, since the light amount of the planar light from the liquid crystal unit UT is controlled for each part (for each pixel) in the surface, as in the first embodiment, an area control type liquid crystal display panel 39 capable of displaying complex images. become.
- the effect of the liquid crystal display device 49 described in the first embodiment is also achieved by the liquid crystal display device 49 of the second embodiment.
- the effective utilization efficiency of light as the liquid crystal display device 49 is particularly improved.
- the light from the backlight unit 29 passes through the liquid crystal display panel 39 having a transmittance of about 3% to 10%. That is, the light of the backlight unit 29 is used only with an efficiency of about 3% to 10%.
- the liquid crystal display device 49 in which the liquid crystal unit UT is the liquid crystal display panel 39 the light emitted from the polymer dispersed liquid crystal 11 due to diffusion by the liquid crystal molecules 13 passes through the optical sheet group 26 having a relatively high transmittance. , A member having a very low transmittance (for example, a conventional liquid crystal display panel) is not passed. Therefore, the effective utilization efficiency of light increases.
- the effective use efficiency of light of the liquid crystal display device 49 in which the liquid crystal unit UT is the liquid crystal display panel 39 is relative to the effective use efficiency of light of the liquid crystal display device 49 on which the backlight unit 29 and the liquid crystal display panel 39 are mounted. 10 times to 33 times or more.
- the backlight unit 29 is not necessary. Therefore, the number of parts of the liquid crystal display device 49 is reduced, and the cost of the liquid crystal display device 49 can be reduced.
- the first transparent electrode TE1 is constituted by the dense first transparent electrode pieces EP1
- the second transparent electrode TE2 is constituted by the dense second transparent electrode pieces EP2. That is, both the transparent electrodes TE1 and TE2 are configured by collecting the transparent electrode pieces EP1 and EP2.
- it is not limited to this.
- the liquid crystal unit UT at least one of the first transparent electrode TE1 and the second transparent electrode TE2 has a plurality of electrode pieces EP densely arranged in a planar shape, and the plurality of electrode pieces EP are individually connected to the voltage. Is applied, the liquid crystal unit UT also becomes an area control type liquid crystal display panel 39.
- the optical sheet group 26 covered the first light-transmitting substrate PB1 of the liquid crystal unit UT. This is because the presence of such an optical sheet group 26 can improve the luminance of light emitted from the liquid crystal unit UT.
- the optical sheet group 26 may be omitted if the light itself emitted from the liquid crystal unit UT has sufficient luminance in the liquid crystal display device 49 of FIG. In the case of the display device 49, the number of parts is reduced).
- the first light transmitting substrate PB1 side in the liquid crystal unit UT is visually recognized by the user (Note that such a liquid crystal display device 49 is referred to as a single-sided viewing type liquid crystal display device 49. ). However, it may be a liquid crystal display device 49 as shown in FIG.
- the liquid crystal display device 49 may be a double-sided viewing type liquid crystal display device 49 in which the first light transmissive substrate PB1 side and the second light transmissive substrate PB2 side in the liquid crystal unit UT are visually recognized by the user (the color filter 37 is a first filter). 2 may be interposed between the transparent electrode TE2 and the second light-transmitting substrate PB2.
- the color filter 37 may be omitted.
- LED21 was mentioned as an example and demonstrated as a light source above, it is not limited to this.
- a light source such as a fluorescent tube (cold cathode tube or hot cathode tube) or a light source formed of a self-luminous material such as organic EL (electroluminescence) or inorganic EL may be used.
- liquid crystal unit 11 polymer dispersed liquid crystal 12 liquid crystal 13 liquid crystal molecule 14 polymer PB light transmissive substrate PB1 first light transmissive substrate (first substrate) PB2 Second light transmitting substrate (second substrate) ST electrode set TE transparent electrode TE1 first transparent electrode (first electrode) TE2 Second transparent electrode (second electrode) EP Transparent electrode piece (electrode piece) EP1 1st transparent electrode piece EP2 2nd transparent electrode piece 21 LED (light source) 22 Reflective sheet 23 Diffusion sheet 24 Lens sheet 25 Lens sheet 29 Backlight unit (light quantity adjustment device) 31 TFT 32 active matrix substrate 33 counter substrate 34 liquid crystal GL gate signal line SL source signal line 35 pixel electrode 36 common electrode 37 color filter 39 liquid crystal display panel (light quantity adjusting device) 49 Liquid crystal display devices (light quantity adjustment devices, electronic equipment)
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Dispersion Chemistry (AREA)
- Liquid Crystal (AREA)
Abstract
Description
実施の一形態について、図面に基づいて説明すれば、以下の通りである。なお、便宜上、ハッチング、部材そのもの、および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、図面上での黒丸は紙面に対し垂直方向を意味する。
実施の形態2について説明する。なお、実施の形態1で用いた部材と同様の機能を有する部材については同一の符号を付記し、その説明を省略する。
なお、本発明は上記の実施の形態に限定されず、本発明の趣旨を逸脱しない範囲で、種々の変更が可能である。
11 高分子分散型液晶
12 液晶
13 液晶分子
14 高分子
PB 光透過性基板
PB1 第1光透過性基板(第1基板)
PB2 第2光透過性基板(第2基板)
ST 電極セット
TE 透明電極
TE1 第1透明電極(第1電極)
TE2 第2透明電極(第2電極)
EP 透明電極片(電極片)
EP1 第1透明電極片
EP2 第2透明電極片
21 LED(光源)
22 反射シート
23 拡散シート
24 レンズシート
25 レンズシート
29 バックライトユニット(光量調整装置)
31 TFT
32 アクティブマトリックス基板
33 対向基板
34 液晶
GL ゲート信号線
SL ソース信号線
35 画素電極
36 コモン電極
37 カラーフィルタ
39 液晶表示パネル(光量調整装置)
49 液晶表示装置(光量調整装置、電子機器)
Claims (8)
- 電圧を印加される第1電極を含む第1基板と、
電圧を印加される第2電極を含む第2基板と、
上記第1電極と上記第2電極とに挟まれ、印加される電圧の増加に応じ、液晶分子の向きを電極間の電界方向に揃える高分子分散型液晶と、
上記第1電極と上記第2電極との間隔から、上記高分子分散型液晶に光を供給する光源と、
を含む光量調整装置。 - 上記第1電極および上記第2電極の少なくとも一方は、面状に密集させた複数の電極片を含み、
上記の複数の電極片は、個別に、電圧を印加される請求項1に記載の光量調整装置。 - 上記高分子分散型液晶への印加電圧は、上記光源に近いほど高い請求項2に記載の光量調整装置。
- 上記高分子分散型液晶での高分子に対する液晶の密度は、上記光源に近いほど低い請求項1~3のいずれか1項に記載の光量調整装置。
- 請求項1~4のいずれか1項に記載の上記光量調整装置が、液晶表示パネルに対して光を供給するバックライトユニットである。
- 請求項1~4のいずれか1項に記載の上記光量調整装置が、液晶表示パネルである。
- 請求項5に記載のバックライトユニットと、
上記バックライトユニットからの光を受ける液晶表示パネルと、
を含む液晶表示装置。 - 請求項6に記載の液晶表示パネルを搭載する液晶表示装置。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/063,786 US20110169877A1 (en) | 2008-09-25 | 2009-07-01 | Light quantity control device, backlight unit, liquid crystal display panel, and liquid crystal display device |
BRPI0919739A BRPI0919739A2 (pt) | 2008-09-25 | 2009-07-01 | dispositivo de controle de quantidade de luz, unidade de luz de fundo, painel de exibição de cristal líquido, e dispositivo de exibição de cristal líquid |
CN2009801355978A CN102150076A (zh) | 2008-09-25 | 2009-07-01 | 光量调整装置、背光源单元、液晶显示面板和液晶显示装置 |
JP2010530769A JP5421276B2 (ja) | 2008-09-25 | 2009-07-01 | 光量調整装置、バックライトユニット、液晶表示パネル、および液晶表示装置 |
RU2011116236/28A RU2473941C2 (ru) | 2008-09-25 | 2009-07-01 | Устройство управления световым потоком, блок подсветки, панель жидкокристаллического дисплея и устройство жидкокристаллического дисплея |
EP09815979A EP2322981A4 (en) | 2008-09-25 | 2009-07-01 | LIGHT VOLUME CONTROL, BACKLIGHT UNIT, LIQUID CRYSTAL DISPLAY PANEL AND LIQUID CRYSTAL DISPLAY DEVICE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008246492 | 2008-09-25 | ||
JP2008-246492 | 2008-09-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010035562A1 true WO2010035562A1 (ja) | 2010-04-01 |
Family
ID=42059569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/062058 WO2010035562A1 (ja) | 2008-09-25 | 2009-07-01 | 光量調整装置、バックライトユニット、液晶表示パネル、および液晶表示装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20110169877A1 (ja) |
EP (1) | EP2322981A4 (ja) |
JP (1) | JP5421276B2 (ja) |
CN (1) | CN102150076A (ja) |
BR (1) | BRPI0919739A2 (ja) |
RU (1) | RU2473941C2 (ja) |
WO (1) | WO2010035562A1 (ja) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012141588A (ja) * | 2010-12-17 | 2012-07-26 | Sony Corp | 照明装置および表示装置 |
JP2012151081A (ja) * | 2010-04-07 | 2012-08-09 | Sony Corp | 照明装置および表示装置 |
WO2012153779A1 (ja) * | 2011-05-10 | 2012-11-15 | ソニー株式会社 | 照明装置および表示装置 |
WO2013168639A1 (ja) * | 2012-05-11 | 2013-11-14 | ソニー株式会社 | 照明装置および表示装置 |
JP2016109794A (ja) * | 2014-12-04 | 2016-06-20 | 株式会社ジャパンディスプレイ | 表示装置 |
JP2016145869A (ja) * | 2015-02-06 | 2016-08-12 | 株式会社ジャパンディスプレイ | 表示装置 |
JP2017076002A (ja) * | 2015-10-13 | 2017-04-20 | 株式会社ジャパンディスプレイ | 表示装置 |
KR101780865B1 (ko) * | 2014-10-22 | 2017-09-21 | 가부시키가이샤 재팬 디스프레이 | 표시 장치 |
JP2018045104A (ja) * | 2016-09-14 | 2018-03-22 | スタンレー電気株式会社 | 照明装置及び液晶表示装置 |
WO2020213221A1 (ja) * | 2019-04-19 | 2020-10-22 | 株式会社ジャパンディスプレイ | 表示装置 |
JP2021015153A (ja) * | 2019-07-10 | 2021-02-12 | 株式会社ジャパンディスプレイ | 表示装置 |
WO2021059779A1 (ja) * | 2019-09-27 | 2021-04-01 | 株式会社ジャパンディスプレイ | 表示装置 |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5467388B2 (ja) * | 2010-04-06 | 2014-04-09 | ソニー株式会社 | 照明装置および表示装置 |
JP5516319B2 (ja) * | 2010-10-20 | 2014-06-11 | ソニー株式会社 | 照明装置および表示装置 |
CN102654687B (zh) * | 2012-02-29 | 2015-06-03 | 京东方科技集团股份有限公司 | 透明显示装置 |
US9429787B2 (en) | 2012-02-29 | 2016-08-30 | Boe Technology Group Co., Ltd. | Transparent display unit |
CN103592771B (zh) * | 2012-08-14 | 2016-01-20 | 上海天马微电子有限公司 | 2d/3d可切换显示装置 |
JP5954097B2 (ja) * | 2012-10-11 | 2016-07-20 | ソニー株式会社 | 表示装置 |
CN104298042A (zh) * | 2014-09-23 | 2015-01-21 | 合肥鑫晟光电科技有限公司 | 一种显示面板及显示装置 |
US9804317B2 (en) | 2015-02-06 | 2017-10-31 | Japan Display Inc. | Display apparatus |
JP2017032782A (ja) * | 2015-07-31 | 2017-02-09 | 株式会社ジャパンディスプレイ | 表示装置 |
US9632346B2 (en) * | 2015-08-27 | 2017-04-25 | Cheeshin Technology Co., Ltd. | Polymer-dispersed liquid crystal light-regulation structure |
KR20170027928A (ko) * | 2015-09-02 | 2017-03-13 | 삼성디스플레이 주식회사 | 백라이트 유닛 및 이를 포함하는 표시장치 |
JP2017076006A (ja) * | 2015-10-13 | 2017-04-20 | 株式会社ジャパンディスプレイ | 表示装置 |
JP6671940B2 (ja) * | 2015-12-07 | 2020-03-25 | 株式会社ジャパンディスプレイ | 表示装置 |
CN105954933B (zh) * | 2016-07-21 | 2019-01-18 | 京东方科技集团股份有限公司 | 显示装置及其制作方法 |
JP6720008B2 (ja) * | 2016-07-22 | 2020-07-08 | 株式会社ジャパンディスプレイ | 表示装置および表示装置の駆動方法 |
JP6800641B2 (ja) * | 2016-07-22 | 2020-12-16 | 株式会社ジャパンディスプレイ | 表示装置 |
CN106019675A (zh) * | 2016-07-29 | 2016-10-12 | 京东方科技集团股份有限公司 | 一种光波导显示模组、电子设备及制作方法 |
CN106019674B (zh) * | 2016-07-29 | 2021-09-14 | 京东方科技集团股份有限公司 | 一种光波导显示模组及电子设备 |
CN106094338B (zh) * | 2016-08-11 | 2023-06-30 | 京东方科技集团股份有限公司 | 一种双面显示装置及电子设备 |
CN106405881B (zh) * | 2016-08-31 | 2019-11-19 | 京东方科技集团股份有限公司 | 一种光学组件及其制作方法、光学器件 |
KR102589676B1 (ko) * | 2016-09-29 | 2023-10-16 | 엘지디스플레이 주식회사 | 백라이트 유닛 및 이를 포함하는 액정 표시 장치 |
CN108345145B (zh) * | 2018-02-09 | 2020-10-27 | 赤峰拓佳光电有限公司 | 一种高对比度背光模组 |
CN108761886A (zh) * | 2018-03-21 | 2018-11-06 | 青岛海信电器股份有限公司 | 一种显示装置 |
CN108445683A (zh) * | 2018-03-26 | 2018-08-24 | 京东方科技集团股份有限公司 | 显示装置及制备方法、控制对比度的方法、光阀控制器 |
CN109164618A (zh) * | 2018-11-09 | 2019-01-08 | 惠科股份有限公司 | 显示面板组件及显示装置 |
JP7315329B2 (ja) * | 2019-01-25 | 2023-07-26 | 株式会社ジャパンディスプレイ | 液晶表示装置及び撮像機能を有する電子機器 |
CN110376787A (zh) * | 2019-07-26 | 2019-10-25 | 京东方科技集团股份有限公司 | 显示面板及制造方法、显示装置 |
CN111308774A (zh) * | 2020-04-02 | 2020-06-19 | 深圳市华星光电半导体显示技术有限公司 | 液晶显示面板及其制备方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07311381A (ja) | 1994-05-17 | 1995-11-28 | Casio Comput Co Ltd | バックライトユニットおよびそれを用いた表示装置 |
JPH10133591A (ja) * | 1996-08-07 | 1998-05-22 | Seiko Instr Inc | 導光型照明装置及び導光型表示装置 |
JPH11212088A (ja) * | 1998-01-23 | 1999-08-06 | Toshiba Corp | 光照射装置及び液晶表示装置 |
JP2002049037A (ja) * | 2000-08-03 | 2002-02-15 | Hitachi Ltd | 照明装置及びそれを用いた液晶表示装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5099343A (en) * | 1989-05-25 | 1992-03-24 | Hughes Aircraft Company | Edge-illuminated liquid crystal display devices |
US5680233A (en) * | 1994-04-21 | 1997-10-21 | Reveo, Inc. | Image display systems having direct and projection viewing modes |
GB0326005D0 (en) * | 2003-11-07 | 2003-12-10 | Koninkl Philips Electronics Nv | Waveguide for autostereoscopic display |
US7349043B2 (en) * | 2004-05-24 | 2008-03-25 | Nec Corporation | Light source, display device, portable terminal device, and ray direction switching element |
RU46865U1 (ru) * | 2005-04-05 | 2005-07-27 | Закрытое Акционерное Общество "Транзас" | Матричная светодиодная система для подсветки жидкокристаллического индикатора |
-
2009
- 2009-07-01 BR BRPI0919739A patent/BRPI0919739A2/pt not_active IP Right Cessation
- 2009-07-01 EP EP09815979A patent/EP2322981A4/en not_active Withdrawn
- 2009-07-01 US US13/063,786 patent/US20110169877A1/en not_active Abandoned
- 2009-07-01 WO PCT/JP2009/062058 patent/WO2010035562A1/ja active Application Filing
- 2009-07-01 CN CN2009801355978A patent/CN102150076A/zh active Pending
- 2009-07-01 RU RU2011116236/28A patent/RU2473941C2/ru not_active IP Right Cessation
- 2009-07-01 JP JP2010530769A patent/JP5421276B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07311381A (ja) | 1994-05-17 | 1995-11-28 | Casio Comput Co Ltd | バックライトユニットおよびそれを用いた表示装置 |
JPH10133591A (ja) * | 1996-08-07 | 1998-05-22 | Seiko Instr Inc | 導光型照明装置及び導光型表示装置 |
JPH11212088A (ja) * | 1998-01-23 | 1999-08-06 | Toshiba Corp | 光照射装置及び液晶表示装置 |
JP2002049037A (ja) * | 2000-08-03 | 2002-02-15 | Hitachi Ltd | 照明装置及びそれを用いた液晶表示装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2322981A4 * |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012151081A (ja) * | 2010-04-07 | 2012-08-09 | Sony Corp | 照明装置および表示装置 |
JP2012141588A (ja) * | 2010-12-17 | 2012-07-26 | Sony Corp | 照明装置および表示装置 |
US9513487B2 (en) | 2011-05-10 | 2016-12-06 | Sony Corporation | Illumination device including a light modulation layer, and a display unit including the illumination device |
WO2012153779A1 (ja) * | 2011-05-10 | 2012-11-15 | ソニー株式会社 | 照明装置および表示装置 |
WO2013168639A1 (ja) * | 2012-05-11 | 2013-11-14 | ソニー株式会社 | 照明装置および表示装置 |
JPWO2013168639A1 (ja) * | 2012-05-11 | 2016-01-07 | ソニー株式会社 | 照明装置および表示装置 |
US9395573B2 (en) | 2012-05-11 | 2016-07-19 | Sony Corporation | Illumination unit including light modulation layer and display unit |
US10268062B2 (en) | 2014-10-22 | 2019-04-23 | Japan Display Inc. | Display device |
US10564465B2 (en) | 2014-10-22 | 2020-02-18 | Japan Display Inc. | Display device |
US11867995B2 (en) | 2014-10-22 | 2024-01-09 | Japan Display Inc. | Display device |
KR101780865B1 (ko) * | 2014-10-22 | 2017-09-21 | 가부시키가이샤 재팬 디스프레이 | 표시 장치 |
US11531226B2 (en) | 2014-10-22 | 2022-12-20 | Japan Display Inc. | Display device |
US11181766B2 (en) | 2014-10-22 | 2021-11-23 | Japan Display Inc. | Display device |
JP2016109794A (ja) * | 2014-12-04 | 2016-06-20 | 株式会社ジャパンディスプレイ | 表示装置 |
US10317731B2 (en) | 2014-12-04 | 2019-06-11 | Japan Display Inc. | Display device |
US10571746B2 (en) | 2014-12-04 | 2020-02-25 | Japan Display Inc. | Display device |
JP2016145869A (ja) * | 2015-02-06 | 2016-08-12 | 株式会社ジャパンディスプレイ | 表示装置 |
JP2017076002A (ja) * | 2015-10-13 | 2017-04-20 | 株式会社ジャパンディスプレイ | 表示装置 |
JP2018045104A (ja) * | 2016-09-14 | 2018-03-22 | スタンレー電気株式会社 | 照明装置及び液晶表示装置 |
WO2020213221A1 (ja) * | 2019-04-19 | 2020-10-22 | 株式会社ジャパンディスプレイ | 表示装置 |
US11614652B2 (en) | 2019-04-19 | 2023-03-28 | Japan Display Inc. | Display device |
JP2021015153A (ja) * | 2019-07-10 | 2021-02-12 | 株式会社ジャパンディスプレイ | 表示装置 |
JP7222835B2 (ja) | 2019-07-10 | 2023-02-15 | 株式会社ジャパンディスプレイ | 表示装置 |
WO2021059779A1 (ja) * | 2019-09-27 | 2021-04-01 | 株式会社ジャパンディスプレイ | 表示装置 |
Also Published As
Publication number | Publication date |
---|---|
JP5421276B2 (ja) | 2014-02-19 |
BRPI0919739A2 (pt) | 2015-12-08 |
US20110169877A1 (en) | 2011-07-14 |
EP2322981A1 (en) | 2011-05-18 |
RU2473941C2 (ru) | 2013-01-27 |
EP2322981A4 (en) | 2012-11-07 |
CN102150076A (zh) | 2011-08-10 |
RU2011116236A (ru) | 2012-10-27 |
JPWO2010035562A1 (ja) | 2012-02-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5421276B2 (ja) | 光量調整装置、バックライトユニット、液晶表示パネル、および液晶表示装置 | |
US9207386B2 (en) | Backlight unit and liquid crystal display module including the same | |
CN109725456B (zh) | 背光单元及包括该背光单元的液晶显示装置 | |
US8690372B2 (en) | Backlight unit and display apparatus having the same | |
GB2559856B (en) | Liquid crystal display device | |
TWI694279B (zh) | 背光單元以及包含其之液晶顯示裝置 | |
KR20120050181A (ko) | 컬러 필터를 채용한 컬러 디스플레이 장치 | |
JP2010056030A (ja) | 照明ユニット及び照明ユニットを備えた液晶表示装置 | |
CN105892148B (zh) | 背光模组及液晶显示装置 | |
CN101988998A (zh) | 液晶显示装置 | |
US20170285384A1 (en) | Liquid crystal display device and liquid crystal display system | |
USRE45229E1 (en) | Backlight for color liquid crystal display apparatus | |
CN110928043A (zh) | 透明显示面板和电子设备 | |
JP5339615B2 (ja) | 液晶表示装置 | |
JP4628043B2 (ja) | 液晶表示装置 | |
JP4754846B2 (ja) | 液晶表示装置 | |
KR101394319B1 (ko) | 투명 액정표시장치 | |
KR102121321B1 (ko) | 액정표시장치 및 그 제조방법 | |
CN112327529A (zh) | 显示装置及显示装置的驱动方法 | |
JP2017151260A (ja) | 表示装置 | |
KR20080056944A (ko) | 박막 트랜지스터 기판 및 이를 구비하는 표시 장치 | |
US20230131661A1 (en) | Display device | |
WO2012005320A1 (ja) | 照明装置、液晶表示装置 | |
US20230119542A1 (en) | Liquid crystal display device | |
US9069203B2 (en) | Liquid crystal panel |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980135597.8 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09815979 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010530769 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009815979 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13063786 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2013/CHENP/2011 Country of ref document: IN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011116236 Country of ref document: RU |
|
ENP | Entry into the national phase |
Ref document number: PI0919739 Country of ref document: BR Kind code of ref document: A2 Effective date: 20110325 |