JP2008209779A - Liquid crystal display - Google Patents

Abstract

A backlight for facilitating the arrangement of light emitting elements by sequentially emitting image light from each pixel row in response to sequential application of operating voltages to a plurality of pixel rows of a liquid crystal display element.
A light guide space 18 is formed on the opposite side of the liquid crystal display element 1 from the observation side so that light is incident from one end side in a direction parallel to the pixel row and the light passes in the other end direction. A plurality of micromirrors 19 are arranged in a plurality of rows on the surface facing the display element 1 so as to control a lying state and a rising state in which light incident on the light guide space 18 from one end side is reflected toward the liquid crystal display element 1. And the micromirror 19 is controlled to sequentially rise to the plurality of micromirror groups respectively corresponding to the plurality of pixel rows of the liquid crystal display element 1 in synchronization with sequentially applied voltages to the plurality of pixel rows. A micromirror array panel 16 and a backlight 15 including a plurality of light emitting elements 23 arranged to face one end of the light guide space 18 are arranged.
[Selection] Figure 1

Description

  The present invention relates to a liquid crystal display device.

  As a liquid crystal display device, a plurality of pixels for controlling light transmission are arranged in a plurality of rows, and an operation voltage corresponding to image data is sequentially applied to each of a plurality of pixel rows composed of a plurality of pixels arranged in the row direction. A device including a liquid crystal display element that displays an image when applied and a backlight disposed on the side opposite to the observation side of the liquid crystal display element is known.

  The backlight is made of a plate-shaped transparent member, and an incident end face for allowing light to enter is formed on one end face in a direction parallel to the pixel row of the liquid crystal display element, and the backlight is opposed to the liquid crystal display element. A light guide plate in which an exit surface of light incident from the incident end surface is formed, and a reflection surface that reflects light incident from the incident end surface toward the exit surface is formed on the opposite plate surface; The light emitting elements are arranged opposite to the incident end face and arranged in the same number as the number of pixel rows of the liquid crystal display element at a pitch corresponding to the pitch of the plurality of pixel rows of the liquid crystal display element (Patent Document 1). reference).

The liquid crystal display device sequentially turns on a plurality of light emitting elements of the backlight (the same number as the number of pixel rows of the liquid crystal display element) in synchronization with the sequential application of the operating voltage to the plurality of pixel rows of the liquid crystal display element. Thus, the illumination light is selectively irradiated toward the pixel row to which the operating voltage is applied among the plurality of pixel rows of the liquid crystal display element. According to the liquid crystal display device, Corresponding to sequential application of operating voltages to a plurality of pixel rows of the liquid crystal display element, it is possible to perform display in which image light is sequentially emitted from the plurality of pixel rows.
JP 2002-341312 A

  However, in the conventional liquid crystal display device that irradiates light from the same number of light emitting elements as the number of pixel rows of the liquid crystal display elements toward the plurality of pixel rows of the liquid crystal display elements, the plurality of light emitting elements are applied to the liquid crystal display. Since it must be positioned and arranged with high precision corresponding to each of a plurality of pixel rows of the element, assembly is difficult and manufacturing cost is increased.

  In accordance with the sequential application of operating voltages to a plurality of pixel rows of a liquid crystal display element, the present invention can perform display in which image light is sequentially emitted from the plurality of pixel rows, and constitutes a backlight. An object of the present invention is to provide a liquid crystal display device in which the structure and arrangement of light emitting elements are simplified.

The liquid crystal display device according to claim 1 of the present invention is
A plurality of pixels that control light transmission are arranged in a plurality of rows and columns, and the operation voltage of each pixel corresponding to the image data is sequentially applied to each of a plurality of pixel rows including a plurality of pixels arranged in the row direction. A liquid crystal display element for applying and displaying an image;
The liquid crystal display element is disposed on the side opposite to the viewing side, and light is incident on one side opposite to the liquid crystal display element from one end side in a direction parallel to the pixel row, and the light passes in the other end direction. A surface that forms a light guide space and faces the liquid crystal display element, and is inclined with respect to the surface, rises obliquely toward the other end direction of the light guide space with respect to the surface, A plurality of micromirrors controlled to reflect light incident from the one end side into the light guide space toward the liquid crystal display element are arranged in a plurality of rows, and these micromirrors are arranged in the liquid crystal display. For each of a plurality of micromirror groups respectively corresponding to a plurality of pixel rows of the element, a micromirror array that is sequentially controlled to the rising state in synchronization with the sequential application of the operating voltage to the plurality of pixel rows of the liquid crystal display element And panel, are disposed opposite to one end of the light guiding space, the backlight comprising a plurality of light emitting elements for emitting light toward the light guiding space,
It is characterized by providing.

  According to a second aspect of the present invention, in the liquid crystal display device according to the first aspect, the backlight is disposed between the micromirror array panel and the micromirror array panel on a side facing the liquid crystal display element. The light guide space is further formed by a gap between the micromirror array panel and the transparent plate. The transparent plate is further provided with a transparent plate.

  According to a third aspect of the present invention, in the liquid crystal display device according to the first or second aspect, the micromirror controlled to a rising state of the micromirror array panel between the backlight and the liquid crystal display element. A diffusion layer for diffusing the light reflected toward the liquid crystal display element is provided.

  According to the liquid crystal display device of the present invention, in a backlight that sequentially emits image light from the plurality of pixel rows in response to sequential application of operating voltages to the plurality of pixel rows of the liquid crystal display element, the backlight It is possible to reduce the number of light-emitting elements constituting the light-emitting element and facilitate the arrangement of the light-emitting elements.

  1 to 4 show an embodiment of the present invention, FIG. 1 is a side view of a liquid crystal display device, and FIG. 2 is a micromirror array panel constituting a backlight of the liquid crystal display device and a plurality of light emitting elements. FIG. 3 is a plan view, FIG. 3 is an enlarged cross-sectional view of a micromirror lying down along one pixel row of the liquid crystal display device, and FIG. 4 is an enlarged cross-sectional view of a micromirror rising state along one pixel row of the liquid crystal display device. .

  In this liquid crystal display device, a plurality of pixels for controlling light transmission are arranged in a row direction and a column direction, and an operation voltage corresponding to image data is sequentially applied to each pixel row including a plurality of pixels arranged in the row direction. A liquid crystal display element 1 that displays an image by applying the liquid crystal display element 1 and an operation voltage applied to each pixel row of the liquid crystal display element 1 are sequentially arranged on the opposite side of the liquid crystal display element 1 from the observation side (upper side in FIG. 1). In synchronization with the application, the backlight 15 irradiates the illumination light selectively toward the pixel row to which the operating voltage is applied among the plurality of pixel rows of the liquid crystal display element 1.

  The liquid crystal display element 1 is a transmissive active matrix liquid crystal display element using, for example, a TFT (thin film transistor) as an active element. As shown in FIGS. 3 and 4, a frame-shaped sealing material 4 (see FIG. 1) is used. A liquid crystal layer 5 is sealed in a region surrounded by the sealing material 4 between the pair of transparent substrates 2 and 3 on the opposite side and the observation side bonded together, and one of the opposing inner surfaces of the pair of substrates 2 and 3 For example, a plurality of transparent pixel electrodes 6 formed on the inner surface of the substrate 3 opposite to the observation side and arranged in a matrix in the row direction (left-right direction of the screen) and the column direction (up-down direction of the screen) A plurality of TFTs 7 connected to the pixel electrodes 6, a plurality of scanning lines for supplying gate signals to the TFTs 7 in each row, and a plurality of signal lines for supplying data signals to the TFTs 7 in each row (not shown) And provided On the other substrate, that is, on the inner surface of the substrate 2 on the observation side, a single-film transparent counter electrode 8 corresponding to the plurality of pixel electrodes 6, and the plurality of pixel electrodes 6 and the counter electrode 8 are mutually connected. Red, green, and blue color filters 9R, 9G, and 9B that are formed to correspond to the plurality of pixels 14 that are opposed to each other are provided, and polarized light is applied to the outer surfaces of the pair of substrates 2 and 3, respectively. The plates 12 and 13 are arranged.

  3 and 4, the TFT 7 is simplified. The TFT 7 includes a gate electrode formed on a plate surface of the opposite substrate 3 and the plurality of pixel electrodes covering the gate electrode. A transparent gate insulating film formed over the entire region of the arrangement region 6, an i-type semiconductor film formed on the gate insulating film so as to face the gate electrode, and a channel region of the i-type semiconductor film It consists of a drain electrode and a source electrode formed on both sides via an n-type semiconductor film.

  The plurality of scanning lines are formed on the plate surface of the opposite substrate 3 and connected to the gate electrode of the TFT 7, and the plurality of signal lines are formed on the gate insulating film. Are connected to the drain electrode of the TFT 7.

  The plurality of pixel electrodes 6 are formed on the gate insulating film and are connected to the source electrodes of the TFTs 7 corresponding to the pixel electrodes 6, respectively.

  Further, alignment films 10 and 11 are formed on the inner surfaces of the pair of substrates 2 and 3 so as to cover the electrodes 8 and 6, respectively, and the liquid crystal molecules of the liquid crystal layer 5 are formed by the alignment films 10 and 11. It is oriented in a predetermined orientation state defined.

  The liquid crystal display element 1 includes a TN or STN type in which the liquid crystal molecules of the liquid crystal layer are twist-aligned, a vertical alignment type in which the liquid crystal molecules are aligned substantially perpendicular to the surfaces of the substrates 2 and 3, and the liquid crystal molecules are twisted. A horizontal alignment type that is aligned substantially parallel to the surfaces of the substrates 2 and 3 without bending, a bend alignment type that bends liquid crystal molecules, or a ferroelectric or antiferroelectric liquid crystal display element. The pair of polarizing plates 5 and 6 are arranged with their transmission axes oriented so as to obtain good contrast.

  In the liquid crystal display element 1 of this embodiment, an electric field is generated between the electrodes 6 and 8 provided on the inner surfaces of the pair of substrates 2 and 3 to change the alignment state of the liquid crystal molecules. The display element is provided with, for example, comb-like first and second electrodes that form a plurality of pixels on the inner surface of one of a pair of substrates, and a horizontal electric field (electric field in a direction along the substrate surface) between these electrodes. It may be of a lateral electric field control type that changes the alignment state of liquid crystal molecules by generating.

  The liquid crystal display element 1 displays an image by sequentially applying an operating voltage corresponding to image data to each pixel row including a plurality of pixels 14 arranged in the row direction by a display driver (not shown).

  Next, the backlight 15 will be described. The backlight 15 is arranged on the side opposite to the viewing side of the liquid crystal display element 1 and spaced from the liquid crystal display element 1, and faces the liquid crystal display element 1. A light guide space 18 that allows light to enter from one end side in a direction parallel to the pixel row and pass the light in the other end direction, and on the surface facing the liquid crystal display element 1, The liquid crystal display element 1 emits light that rises obliquely toward the other end direction of the light guide space 18 with respect to the surface and is incident on the light guide space 18 from the one end side. Are arranged in a plurality of rows, and these micromirrors 19 are provided in a plurality of micro-rows corresponding to the plurality of pixel rows of the liquid crystal display element 1, respectively. The micromirror array panel 16 that is sequentially controlled to the rising state in synchronization with the sequential application of the operating voltage to a plurality of pixel rows of the liquid crystal display element 1 for each group of light, and one end of the light guide space 18 The light-emitting elements 23 are arranged to face each other and emit light toward the light guide space 18.

  The micromirror array panel 16 has an area corresponding to the screen area of the liquid crystal display element 1 (arrangement area of the plurality of pixels 14) on a rectangular panel substrate 17 corresponding to the outer shape of the liquid crystal display element 1. Throughout, for example, a mirror driving element (not shown) based on a CMOS (complementary metal oxide semiconductor), for example, is inclined with respect to the panel substrate 17 surface, and 30 ° with respect to the panel substrate 17 surface. A plurality of micro mirrors 19 such as DLP type or MEMS type controlled to rise up obliquely at a predetermined angle within a range of ˜50 ° are set in one direction (light guiding space). 18 are arranged at a dense pitch in a direction parallel to a plurality of pixel rows of the liquid crystal display element 1 and a direction orthogonal to the pixel rows. The micromirror 19 is made of a square-shaped ultrathin metal piece (for example, an aluminum piece) having a vertical and horizontal width of 10 μm to 20 μm.

  The backlight 15 is formed in a rectangular shape having substantially the same area as the micromirror array panel 16, and the micromirror array panel 16 is disposed on the side of the micromirror array panel 16 facing the liquid crystal display element 1. And a transparent plate 20 disposed parallel to the surface of the panel substrate 17 of the micromirror array panel 16 with a gap between the micromirror array panel 16 and the light guide space 18. It is formed by a gap between the plate 20.

  At one end of the light guide space 18, an elongated transparent body having substantially the same length as the width dimension in the direction perpendicular to the pixel rows of the liquid crystal display element 1 of the micromirror array panel 16 and the transparent plate 20. The light guide member 21 is disposed so that one side surface thereof faces the light guide space 18, and the other end of the light guide space 18 is incident on the light guide space 18 from one end side thereof. A light absorbing plate 22 is disposed for absorbing light that has passed through the light guide space 18 in the direction of the other end.

  The plurality of light emitting elements 23 are made of LEDs (light emitting diodes), and a light emitting surface is provided outside the light guide member 21 (outside the surface opposite to the surface on the light guide space 18 side). Opposite to the outer surface of the light guide member 21, the light guide member 21 is arranged at predetermined intervals in the length direction of the light guide member 21.

  The light guide member 21 has an inner surface facing the light guide space 18 having substantially the same height as the gap between the micromirror array panel 16 and the transparent plate 20, and an outer surface having the height described above. The light guide member 21 has a trapezoidal cross-sectional shape that is smaller than the height of the inner surface, out of the light emitted from the plurality of light emitting elements 23 and incident on the light guide member 21 from the outer surface thereof. The light directly directed to the inner surface is emitted from the inner surface to the light guide space 18, and the light directed to the upper and lower surfaces of the light guide member 21 is totally reflected at the interface between the upper and lower surfaces and the outside air (air). The light is emitted from the inner surface to the light guide space 18.

  The number and arrangement interval of the plurality of light emitting elements 23 are such that the intensity of light emitted from the plurality of light emitting elements 23 and guided by the light guide member 21 and incident on the light guide space 18 is the liquid crystal. It is set to be substantially uniform over the entire length in the direction orthogonal to the pixel rows of the display element 1.

  The plurality of light emitting elements 23 are continuously lit during use of the liquid crystal display device by a light emitting element driving circuit (not shown), and the plurality of micromirrors 19 of the micromirror array panel 16 are connected to the respective mirror driving elements. By a micromirror drive circuit (not shown) that selectively supplies a drive signal, the light guide space is inclined with respect to the panel substrate 17 surface as shown in FIG. 3 and the light guide space with respect to the panel substrate 17 surface as shown in FIG. The light that rises obliquely toward the other end direction of the light 18 and is incident on the light guide space 18 from the one end side is controlled to be reflected toward the liquid crystal display element 1.

  The micromirror drive circuit includes a plurality of micromirrors 19 of the micromirror array panel 16 for each of a plurality of micromirror groups respectively corresponding to a plurality of pixel rows of the liquid crystal display element 1. The rising state is sequentially controlled in synchronization with the sequential application of the operating voltage to the pixel rows.

  The timing for controlling the micromirrors 19 of each micromirror group of the micromirror array panel 16 to the rising state is the same as the application period of the operating voltage to the pixel row corresponding to each micromirror group, or It is set after a predetermined time according to the response of the liquid crystal to the application period of the operating voltage to the corresponding pixel row, and the time for maintaining the micromirror 19 in the rising state is the liquid crystal display element. It is set to be the same as or shorter than the selection period of one pixel row (operation voltage application period).

  Although the micromirror 19 is greatly exaggerated in the figure, the vertical and horizontal widths of the micromirror 19 are 10 μm to 20 μm as described above, whereas the one of the pixels 14 of the liquid crystal display element 1 is Since the vertical and horizontal widths are 50 μm to 100 μm, in this embodiment, the micromirrors 19 of 5 rows to 10 rows are used as one micromirror group, and the micromirrors 19 of 5 rows to 10 rows are sequentially controlled to rise up. Like to do.

  Further, between the transparent plate 20 of the backlight 15 and the liquid crystal display element 1, the light is emitted from the plurality of light emitting elements 23 and enters the light guide space 18, and the micromirror array panel 16 rises. A diffusion layer 24 is provided for diffusing the light reflected toward the liquid crystal display element 1 by the micromirror 19 controlled in a state.

  In this embodiment, the diffusion layer 24 is formed of a transparent pressure-sensitive adhesive layer in which light scattering particles are dispersed, and the transparent plate 20 is connected to the observation side of the liquid crystal display element 1 through the diffusion layer 24. It is affixed on the opposite surface (the outer surface of the polarizing plate 13).

  The liquid crystal display device is disposed on the opposite side of the liquid crystal display element 1 from the observation side and spaced apart from the liquid crystal display element 1, and on the side facing the liquid crystal display element 1, the pixels of the liquid crystal display element 1. A light guide space 18 for allowing light to enter from one end side in a direction parallel to the row and passing the light in the other end direction is formed, and the surface facing the liquid crystal display element 1 is inclined with respect to the surface. And a state in which light that rises obliquely toward the other end direction of the light guide space 18 with respect to the surface and reflects light incident on the light guide space 18 from the one end side toward the liquid crystal display element 1 A plurality of micromirrors 19 controlled by the above are arranged in a plurality of rows, and these micromirrors 19 are provided for each of a plurality of micromirror groups respectively corresponding to a plurality of pixel rows of the liquid crystal display element 1. Of the liquid crystal display element 1 The micromirror array panel 16 that is sequentially controlled to the rising state in synchronization with the sequential application of operating voltages to a number of pixel rows, and disposed opposite to one end of the light guide space 18. Since the backlight 15 composed of a plurality of light emitting elements 23 that emit light toward the surface is arranged, the plurality of pixels correspond to the sequential application of the operating voltage to the plurality of pixel rows of the liquid crystal display element 1. Display in which image light is emitted sequentially from the row can be performed.

  That is, since the backlight 15 is configured as described above, the light is emitted from the plurality of light emitting elements 23 that are continuously lit while the liquid crystal display device is in use, and is guided by the light guide member 21 to be guided by the light guide. Of the light that has entered the space 18 from one end thereof, the light that has entered the region where the micromirror 19 is controlled to be in a lying state travels straight through the light guide space 18 or is indicated by an arrow in FIG. As described above, the reflected micromirror 19 or the transparent plate 20 is reflected at the interface between the light guide space 18 and passes through the light guide space 18 in the other end direction, and the micromirror 19 is controlled to rise. As shown by the arrow in FIG. 4, the light incident toward the region is reflected by the raised micromirror 19, passes through the transparent plate 20, and is further diffused by the diffusion layer 24. It is irradiated toward the liquid crystal display device 1 Te. The light passing through the light guide space 18 in the other end direction is absorbed by the light absorbing plate 22.

  In the liquid crystal display device, the plurality of micromirrors 19 of the micromirror array panel 16 are arranged for each of a plurality of micromirror groups respectively corresponding to a plurality of pixel rows of the liquid crystal display element 1. In order to control the rising state sequentially in synchronization with the sequential application of the operating voltage to the plurality of pixel rows, in response to the sequential application of the operating voltage to the plurality of pixel rows of the liquid crystal display element 1, Display in which image light is sequentially emitted from the plurality of pixel rows can be performed.

  For this reason, this liquid crystal display device improves the moving image display characteristics by eliminating the emission of light from the pixel rows other than the pixel row to which the operating voltage of the liquid crystal display element 1 is applied, and provides high-quality display without luminance unevenness. Can be performed.

  In this liquid crystal display device, the micromirror 19 of each micromirror group of the micromirror array panel 16 has a response time of the liquid crystal with respect to the operating voltage rather than the application period of the operating voltage to the pixel row to which each micromirror group corresponds. It is preferable to control to the rising state later, and by doing so, the moving image display characteristics can be further improved.

  In addition, in the liquid crystal display device, the plurality of light emitting elements 23 of the backlight 15 are continuously lit during use of the liquid crystal display device, and the plurality of micromirrors 19 of the micromirror array panel 16 are turned on. By sequentially controlling the rising state in synchronization with sequential application of operating voltages to the plurality of pixel rows of the liquid crystal display element 1 for each of the plurality of micromirror groups respectively corresponding to the plurality of pixel rows. Since the light emitted from the plurality of light emitting elements 23 is reflected by the micromirror 19 controlled to the rising state and sequentially irradiated toward the plurality of pixel rows of the liquid crystal display element 1, As in a conventional liquid crystal display device that irradiates light from the same number of light emitting elements as the number of pixel rows toward a plurality of pixel rows of the liquid crystal display elements, There is no need to position and arrange the light emitting elements with high accuracy corresponding to the plurality of pixel rows of the liquid crystal display element, and therefore, the arrangement of the light emitting elements 23 constituting the backlight 15 is facilitated and manufactured. Cost can be reduced.

  In addition, the liquid crystal display element has a direction in which the intensity of light emitted from the light emitting elements 23 and entering the light guide space 18 is orthogonal to the pixel rows of the liquid crystal display element 1. Therefore, the number of light emitting elements can be reduced and the manufacturing cost can be reduced as compared with the conventional liquid crystal display device.

  Further, in the liquid crystal display device of the above embodiment, a transparent plate 20 is disposed on the side of the micromirror array panel 16 facing the liquid crystal display element 1 with a gap between the micromirror array panel 16 and the micromirror array panel 16. Since the light guide space 18 is formed by the gap between the micromirror array panel 16 and the transparent plate 20, out of the light emitted from the plurality of light emitting elements 23 and incident on the light guide space 18. The light traveling toward the liquid crystal display element 1 can be reflected at the interface between the transparent plate 20 and the light guide space 18.

  Therefore, the liquid crystal display element 1 is not irradiated with light from a region other than that corresponding to the micromirror group in which the micromirrors 19 of the micromirror array panel 16 are controlled to rise up. The emission of light from pixel rows other than the pixel row to which the operating voltage of 1 is applied can be more reliably eliminated.

  In the liquid crystal display device of the above embodiment, since the diffusion layer 24 is provided between the backlight 15 and the liquid crystal display element 1, the light is emitted from the plurality of light emitting elements 23 and the micromirror array panel 16. The light reflected by each micromirror 19 of the micromirror group controlled to the rising state is diffused by the diffusion layer 24 and irradiated with illumination light having a uniform intensity distribution toward the liquid crystal display element 1. Therefore, a higher quality image can be displayed on the liquid crystal display element 1.

  Note that the micromirror array panel 16 of the above embodiment has a plurality of micromirrors 19 provided on a flat panel substrate 17, but the micromirror array panel 16 is the same as that shown in FIG. As in the embodiment, the surface facing the liquid crystal display element 1 is formed on each step surface of the panel substrate 17a formed in a stepped surface that is sequentially raised from the incident end side of the light guide space 18 toward the other end direction. A plurality of micromirrors 19 may be arranged in the longitudinal direction of the step surface (a direction orthogonal to the pixel row of the liquid crystal display element 1).

  Furthermore, although the diffusion layer 24 is provided between the backlight 15 and the liquid crystal display element 1 in the above embodiment, the diffusion layer 24 may be omitted.

  Further, in the above embodiment, the transparent plate 20 is disposed on the side of the micromirror array panel 16 facing the liquid crystal display element 1 with a gap between the micromirror array panel 16 and the light guide space 18. The transparent mirror 20 is formed by a gap between the micromirror array panel 16 and the transparent plate 20, but the light guide space is omitted between the micromirror array panel 16 and the diffusion layer 24. 18 may be formed, and when the diffusion layer 24 is omitted, a light guide space 18 may be formed between the micromirror array panel 16 and the liquid crystal display element 1.

The side view of the liquid crystal display device which shows one Example of this invention. FIG. 3 is a plan view of a micromirror array panel and a plurality of light emitting elements constituting a backlight of the liquid crystal display device. FIG. 3 is an enlarged cross-sectional view of a micromirror lying down along one pixel row of the liquid crystal display device. FIG. 3 is an enlarged cross-sectional view of a state in which a micromirror is raised along one pixel row of the liquid crystal display device. The side view of the liquid crystal display device which shows the other Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display element, 2, 3 ... Substrate, 6 ... Pixel electrode, 7 ... TFT, 8 ... Counter electrode, 12, 13 ... Polarizing plate, 15 ... Back light, 16 ... Micromirror array panel, 17, 17a ... Panel Substrate, 18 ... light guide space, 19 ... micromirror, 20 ... transparent plate, 21 ... light guide member, 22 ... light absorbing plate, 23 ... light emitting element, 24 ... diffusion layer.

Claims (3)

A plurality of pixels that control light transmission are arranged in a plurality of rows and columns, and the operation voltage of each pixel corresponding to the image data is sequentially applied to each of a plurality of pixel rows including a plurality of pixels arranged in the row direction. A liquid crystal display element for applying and displaying an image;
The liquid crystal display element is disposed on the side opposite to the viewing side, and light is incident on one side opposite to the liquid crystal display element from one end side in a direction parallel to the pixel row, and the light passes in the other end direction. A surface that forms a light guide space and faces the liquid crystal display element, and is inclined with respect to the surface, rises obliquely toward the other end direction of the light guide space with respect to the surface, A plurality of micromirrors controlled to reflect light incident from the one end side into the light guide space toward the liquid crystal display element are arranged in a plurality of rows, and these micromirrors are arranged in the liquid crystal display. For each of a plurality of micromirror groups respectively corresponding to a plurality of pixel rows of the element, a micromirror array that is sequentially controlled to the rising state in synchronization with the sequential application of the operating voltage to the plurality of pixel rows of the liquid crystal display element And panel, are disposed opposite to one end of the light guiding space, the backlight comprising a plurality of light emitting elements for emitting light toward the light guiding space,
A liquid crystal display device comprising:   The backlight further includes a transparent plate disposed on the side facing the liquid crystal display element of the micromirror array panel with a gap between the micromirror array panel and the light guide space. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is formed by a gap between the micromirror array panel and the transparent plate.   Between the backlight and the liquid crystal display element, a diffusion layer is provided for diffusing the light reflected toward the liquid crystal display element by the micromirror controlled to the rising state of the micromirror array panel. The liquid crystal display device according to claim 1 or 2.

Images