KR20100006463A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: A liquid crystal display is provided to secure the optical viewing angle by observing the light of pixel in the front direction and side direction. CONSTITUTION: An optical path conversion sheet(103) includes plural first photometric sections(103a) and plural second photometric sections(103b). The plural first photometric sections are arranged in the upper part of the liquid crystal panel(101). The plural first photometric sections inclines against the upper side of the liquid crystal panel. The plural first photometric sections change the route of the light from each pixel of the liquid crystal panel. The plural second photometric sections are parallel to the upper side of the liquid crystal panel. The plural second photometric sections maintain the route of the light from each pixel.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of observing a screen of bright and clear image quality even when a wide viewing angle is secured and a large viewing angle is observed.

BACKGROUND ART In general, liquid crystal display devices have tended to be gradually widened due to their light weight, thinness, and low power consumption. Accordingly, the liquid crystal display device is widely used as a means for displaying a screen in portable computers, mobile phones, office automation equipment and the like.

In general, a liquid crystal display device displays a desired image on a screen by adjusting the amount of light transmitted according to image signals applied to a plurality of control switching elements arranged in a matrix form.

The liquid crystal display device includes a liquid crystal panel in which a color filter substrate as an upper substrate and a thin film transistor array substrate as a lower substrate are opposed to each other, and a liquid crystal layer is formed between the two substrates, and a scan signal and image information are supplied to the liquid crystal panel. And a light source for supplying light to the liquid crystal panel.

A conventional liquid crystal display device having such a configuration will be described below with reference to the accompanying drawings.

As shown in FIG. 1, a conventional liquid crystal display device includes a liquid crystal panel 1 including a first substrate 1a that is a thin film transistor array substrate and a second substrate 1b that is a color filter substrate. The liquid crystal layer 4 is formed between the first substrate 1a and the second substrate 1b.

A gate line 5 and a data line 6 are formed on the first substrate 1a so as to cross each other longitudinally and horizontally to define a plurality of pixels, and the gate line 5 and the data line 6 of each pixel are formed. The thin film transistor 7 is formed in the region where) crosses each other, and the pixel electrode 8 connected to the drain electrode of the thin film transistor 7 is formed in each pixel.

A color filter layer including color filters 10 corresponding to each pixel is formed on the second substrate 1b, and a vertical electric field is formed on the color filter layer together with the pixel electrode 8 on the first substrate 1a. The common electrode 10 is formed to drive the liquid crystal layer 4.

Conventional liquid crystal display devices having the above-described configuration are commonly referred to as twisted nematic (TN) mode liquid crystal display devices, and such TN mode liquid crystal display devices have a large disadvantage in that the viewing angle range is narrow. Research is active.

A viewing angle range of a conventional general TN mode liquid crystal display will be described with reference to FIGS. 2 and 3.

FIG. 2 is a graph showing luminance data according to a viewing angle in a conventional TN mode liquid crystal display, and FIG. 3 is a graph showing CR (contrast ratio) data according to a viewing angle in a conventional TN mode liquid crystal display. At this time, the vertical axis of the graph of FIG. 3 is a log scale.

Referring to FIG. 2, when the white TN mode LCD is driven white on the screen, the luminance decreases rapidly as the viewing angle increases.

Referring to FIG. 3, in the conventional general TN mode LCD, it can be seen that the CR decreases as the viewing angle increases, and the range of the viewing angle where CR is determined to be 10 or more is generally 0 [°]. ] Is about 60 [˚].

As described above, the conventional TN mode liquid crystal display device has a narrow viewing angle range, which causes inconvenience to the user, and thus requires development of a means for widening the viewing angle.

Accordingly, the present invention is to solve the above problems, an object of the present invention is to provide a liquid crystal display device by improving the display quality of the screen by improving the range of the viewing angle by forming a light path conversion sheet on the liquid crystal panel.

According to an embodiment of the present invention, a liquid crystal display device includes: a liquid crystal panel in which a plurality of pixels are defined; A light source disposed under the liquid crystal panel to supply light to the liquid crystal panel; And a plurality of first light exit parts disposed on an upper portion of the liquid crystal panel and inclined with respect to an upper surface of the liquid crystal panel to convert a path of light from each pixel of the liquid crystal panel, and parallel to an upper surface of the liquid crystal panel. A light path converting sheet including a plurality of second light exit parts for maintaining a path of light from each pixel of the panel; It is configured to include.

A liquid crystal display device according to a preferred embodiment of the present invention having such a configuration includes a first light output part for converting a path of light from the liquid crystal panel and a second light output part for transmitting the light from the liquid crystal panel as it is. Since the conversion means is provided, part of the light emitted from the light source passing through each pixel of the liquid crystal panel is refracted and the rest proceeds as it is, so that the light of the pixel can be observed in both the front direction and the side direction, thereby ensuring a wide viewing angle. It works.

Accordingly, the user has an advantage of observing a screen of bright and clear image quality even if the user observes the screen with a large viewing angle.

Hereinafter, a liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, a liquid crystal display according to a first embodiment of the present invention will be described.

As shown in FIG. 4, the liquid crystal display according to the first exemplary embodiment of the present invention includes a liquid crystal panel 101 in which a plurality of pixels are defined; A light source 102 disposed below the liquid crystal panel 101 to supply light to the liquid crystal panel 101; And a plurality of first light emitters 103a disposed on the liquid crystal panel 101 and inclined with respect to an upper surface of the liquid crystal panel 101 to convert a path of light from each pixel of the liquid crystal panel 101. And a light path converting sheet 103 formed to be parallel to the upper surface of the liquid crystal panel 101 and including a plurality of second light exiting portions 103b for maintaining a path of light from each pixel of the liquid crystal panel 101; It is configured to include.

Each component included in the liquid crystal display according to the preferred embodiment of the present invention having such a configuration will be described in detail as follows.

Referring to FIG. 4, the liquid crystal panel 101 includes a first substrate 101a which is a thin film transistor array substrate and a second substrate 101b which is a color filter substrate, and a liquid crystal between the two substrates 101a and 101b. Layer 104 is formed.

A gate line 105 and a data line 106 are formed on the first substrate 101a so as to cross each other longitudinally and horizontally to define a plurality of pixels. The gate line 105 and the data line of each pixel may be formed. The thin film transistor 107 is formed in the region where the 106 intersects and is connected to the gate line 105 and the data line 106. Each pixel includes a pixel electrode 108 connected to a drain electrode of the thin film transistor 107.

A color filter layer including a plurality of color filters 109 corresponding to each pixel on the first substrate 101a is formed on the second substrate 101b, and the first substrate 101a is formed on the color filter 109 layer. The common electrode 110 driving the liquid crystal layer 104 is formed by forming a vertical electric field together with the pixel electrode 108 on the.

A light source 102 is disposed below the liquid crystal panel 101, and the liquid crystal panel 101 receives light from the light source 102 to display a screen.

Although FIG. 4 briefly illustrates the light source 102, the light source 102 provided in the liquid crystal display according to the preferred embodiment of the present invention may include an external electrode fluorescent lamp (EEFL) and a cold cathode fluorescent lamp ( Various types may be possible, such as a cold cathode fluorescent lamp (CCFL) and a light emitting diode (LED).

Although not shown in detail in the drawing, an optical sheet (not shown) on the upper portion of the light source 102 converts and condenses the light emitted from the light source 102 into a surface light source having a uniform distribution and supplies it to the liquid crystal panel 101. The optical sheet is configured to include a diffusion sheet, a prism sheet, and a protective sheet.

4 and 5, the optical path conversion sheet 103 disposed above the liquid crystal panel 101 is formed to be inclined with respect to the upper surface of the liquid crystal panel 101, so that each of the liquid crystal panel 101 may be inclined. The first light exiting part 103a for converting the path of light from the pixel and the second light exiting part 103b which is formed in parallel with the upper surface of the liquid crystal panel 101 to maintain the path of light from each pixel of the liquid crystal panel 101. ) And a base portion 103c constituting the base of the first light emitting portion 103a and the second light emitting portion 103b.

The plurality of first light exit parts 103a of the light path conversion sheet 103 protrude from the base part 103c in the direction of the liquid crystal panel 101 to form a lenticular lens shape, and are aligned at a predetermined interval in the left and right directions. do.

The second light exit portion 103b of the light path conversion sheet 103 is an area between the plurality of first light exit portions 103a having a lenticular lens shape, and the third light exit portion 103c is the liquid crystal panel 101. ) Is formed parallel to the sheet.

Referring to FIG. 5, the light emitted from the light source 102 and passed through the liquid crystal panel 101 includes the first and second light emitting parts 103a and 103b and the base part 103c as described above. In the process of passing through the light path conversion sheet 103, a part is refracted at a predetermined angle while passing through the first light exit part 103a, and the rest is transmitted through the second light exit part 103b as it is.

As described above, when some of the light emitted from each pixel of the liquid crystal panel 101 is refracted and the other is transmitted as it is, the user may view a large viewing angle not only in the front direction but also in the left and right side directions. Even if you look at it with high quality screen can be observed.

The plurality of pixels defined on the first substrate 101a form a plurality of vertical pixel columns and horizontal pixel columns, and the end widths of the lenticular lens shapes forming the first light exiting part 103a are liquid crystals. In order to prevent the moiré phenomenon from occurring on the screen of the panel 101, it is preferable to be smaller than at least one step width among the vertical pixel columns and the horizontal pixel columns, but in a range of 20 [μm] or more and 100 [μm] or less. Do.

In addition, the first light output part 103a is formed such that an area overlapping the boundary area of the pixel is minimized.

In FIGS. 4, 5 and the above description, a plurality of first light emitting units 103a constituting the light path conversion sheet 103 are arranged in left / right directions so as to be parallel to the horizontal pixel columns at predetermined intervals. The present invention is not limited thereto, and the optical path conversion sheet 103 is not departed from the gist of the present invention, such that the first light exiting part 103a is aligned in the up / down direction so as to be aligned with the vertical pixel column at predetermined intervals. Various examples are possible within the scope. In this case, when the first light emitting part 103a of the light path conversion sheet 103 is aligned in the up / down direction so as to be parallel to the vertical pixel column at a predetermined interval, the viewing angle range in the up / down direction is expected to be expanded. Could be.

The shape of the optical path changing sheet 103 included in the liquid crystal display according to the exemplary embodiment of the present invention is not limited to the above description and illustrated in FIGS. 4 and 5, and the optical path converting sheet 103 is not limited thereto. Various shapes are possible within the scope of the present invention without departing from the gist of the present invention. In this regard, the liquid crystal display according to the second, third, and fourth embodiments of the present invention will be described below.

In the description of the liquid crystal display according to the second, third, and fourth embodiments of the present invention, the same matters as those of the liquid crystal display according to the first embodiment will be omitted, and will be described in detail with respect to the optical path converting means. Do it. In the description of the liquid crystal display according to the second, third, and fourth embodiments of the present invention, the components not shown in FIGS. 6 to 8 refer to FIG. 4, which is a view of the first embodiment. .

First, referring to FIG. 6, the light path conversion sheet 203 included in the liquid crystal display according to the second exemplary embodiment of the present invention is formed to be inclined with respect to the upper surface of the liquid crystal panel (see 101 in FIG. 4) to form a liquid crystal. A first light exit portion 203a for converting a path of light from each pixel of the panel, a second light exit portion 203b formed to be parallel to the upper surface of the liquid crystal panel to maintain a path of light from each pixel of the liquid crystal panel, The base part 203c which forms the base of the said 1st light output part 203a and the 2nd light output part 203b is comprised.

The first light exit portion 203a of the light path conversion sheet 203 is formed to protrude from the base portion 203c in the liquid crystal panel direction to form a plurality of prisms arranged at predetermined intervals in the left and right directions, and each of the prism Each of the shapes includes two surfaces having the same angle with respect to the upper surface of the liquid crystal panel.

The second light exit portion 203b of the light path conversion sheet 203 is an area between the plurality of first light exit portions 203a having a prism shape, and the third area 203c is formed to be parallel to the liquid crystal panel. Sheet.

Referring to FIG. 6, light emitted from the light source (see 102 of FIG. 4) and passing through the liquid crystal panel includes the first and second light emitting parts 203a and 203b and the base part 203c as described above. In the process of passing through the light path conversion sheet 203, a part is refracted at a predetermined angle while passing through the first light exit part 203a, and the other part is transmitted through the second light exit part 203b as it is.

In addition, the short widths of the prism shapes forming the first light exiting part 203a may be arranged in a plurality of vertical pixel columns and horizontal pixel columns defined in the liquid crystal panel to prevent moiré from occurring on the screen of the liquid crystal panel. It is preferably less than at least one step width but in the range of 20 [μm] or more and 100 [μm] or less.

In addition, the first light output part 203a is formed such that the area overlapping the boundary area of the pixel is minimized.

In FIG. 6 and the above description, the plurality of first light output parts 203a constituting the light path conversion sheet 203 are arranged in left / right directions so as to be parallel to the horizontal pixel columns at predetermined intervals. The optical path conversion sheet 203 is not limited thereto, and the optical path conversion sheet 203 may be aligned in an up / down direction so that the first light exiting part 203a is aligned with the vertical pixel column at predetermined intervals, without departing from the scope of the present invention. Various examples are possible in. In this case, when the first light output part 203a of the light path conversion sheet 203 is aligned in the up / down direction to be parallel to the vertical pixel column at a predetermined interval, the viewing angle range in the up / down direction is expected to be expanded. Could be.

Referring to FIG. 7, the optical path conversion sheet 303 included in the liquid crystal display according to the third exemplary embodiment of the present invention is formed to be inclined with respect to the upper surface of the liquid crystal panel (see 101 in FIG. 4). A first light exit portion 303a for converting a path of light from each pixel, a second light exit portion 303b formed to be parallel to an upper surface of the liquid crystal panel to maintain a path of light from each pixel of the liquid crystal panel, and It comprises the base part 303c which forms the base of the 1st light-emitting part 303a and the 2nd light-emitting part 303b.

The light path conversion sheet 303 protrudes toward the liquid crystal panel to form a plurality of hexahedral shapes, and a cross section of the hexahedron cut in a direction perpendicular to the upper surface of the liquid crystal panel forms a trapezoidal shape, and the first light exiting part ( 303a is two surfaces having the same angle with respect to the upper surface of the liquid crystal panel in the trapezoidal shape, the second light exit portion 303b is a surface parallel to the liquid crystal panel in the trapezoidal shape, and the base portion 303c is a liquid crystal It is a sheet formed to be parallel to the panel.

Referring to FIG. 7, light emitted from the light source (see 102 of FIG. 4) and passing through the liquid crystal panel includes the first and second light emitting parts 303a and 303b and the base part 303c as described above. In the process of passing through the light path conversion sheet 303, a part is refracted at a predetermined angle while passing through the first light exit part 303a, and the rest is transmitted through the second light exit part 303b as it is.

In addition, a plurality of vertical pixel columns and horizontal pixels defined in the liquid crystal panel in order to prevent moiré from occurring on the screen of the liquid crystal panel may be formed in each of the hexahedral shapes constituting the plurality of optical path change sheets 303. It is preferable that it is smaller than at least one step width | variety in a column, but it is 20 or more [mu] m and is in the range of 100 or less [mu] m or less.

In addition, the light path conversion sheet 303 is formed so that the area overlapping with the boundary area of the pixel is minimized.

In FIG. 7 and the above description, a plurality of first light output parts 303a constituting the light path conversion sheet 303 are arranged in left / right directions so as to be parallel to the horizontal pixel columns, but the present invention is limited thereto. The light path converting sheet 303 may be various examples without departing from the gist of the present invention, such that the first light output part 303a is aligned in the up / down direction so as to be parallel to the vertical pixel column. In this case, when the first light exit part 303a of the light path conversion sheet 303 is aligned in the up / down direction to be parallel to the vertical pixel column, the viewing angle range in the up / down direction may be expected.

Referring to FIG. 8, the light path conversion sheet 403 included in the liquid crystal display according to the fourth exemplary embodiment of the present invention is formed to be inclined with respect to the upper surface of the liquid crystal panel (see 101 in FIG. 4) to form an angle of the liquid crystal panel. A first light exiting part 403a for converting a path of light from the pixel, a second light exiting part 403b formed to be parallel to an upper surface of the liquid crystal panel to maintain a path of light from each pixel of the liquid crystal panel, and the first And a base portion 403c serving as a base of the second light exiting portions 403a and 403b.

The first light exit portion 403a of the light path conversion sheet 403 is formed to protrude from the base portion 403c toward the liquid crystal panel to form a plurality of embossed shapes, and the second light exit portion 403b has an embossed shape. An area between the plurality of first light output parts 403a, and the base part 403c is a sheet formed to be parallel to the liquid crystal panel.

Referring to FIG. 8, light emitted from the light source (see 102 of FIG. 4) and passing through the liquid crystal panel includes first and second light emitting parts 403a and 403b and a base part 403c as described above. In the process of passing through the light path conversion sheet 403, a part is refracted at a predetermined angle while passing through the first light exit part 403a, and the rest is transmitted through the second light exit part 403b as it is.

In addition, each step width of each of the embossed shapes of the first light exiting part 403a is defined by a plurality of vertical pixel columns and horizontal pixel columns defined in the liquid crystal panel to prevent moiré from occurring on the screen of the liquid crystal panel. (Iii) It is preferably smaller than the width but in the range of 20 [mu m] or more and 100 [mu m] or less.

In addition, the first light output part 403a is formed such that an area overlapping the boundary area of the pixel is minimized.

8 and the above description, the first light exit portion 403a of the light path conversion sheet 403 included in the liquid crystal display according to the fourth embodiment of the present invention has an embossed shape. The first light exit portion 403a of the sheet 403 may be various examples such as pyramid shape within a range not departing from the gist of the present invention.

The liquid crystal display device according to the second, third, and fourth embodiments of the present invention having the above-described configuration is similar to the liquid crystal display device according to the first embodiment, and each pixel of the liquid crystal panel (see 101 in FIG. 4). Since some of the light emitted from the light is refracted and the other is transmitted as it is, the user can see a bright and clear picture even when the user views the LCD panel with a large viewing angle in the left / right direction or the up / down direction as well as the front direction. Can be observed.

Hereinafter, the effects of the present invention will be demonstrated with reference to FIGS. 9 to 12.

FIG. 9 is a graph illustrating luminance data according to a viewing angle of a liquid crystal display according to a first embodiment of the present invention together with luminance data according to a viewing angle of a conventional general liquid crystal display, and FIG. 10 is a preferred embodiment of the present invention. In the liquid crystal display according to the present invention, CR (contrast ratio) data according to the viewing angle is displayed along with CR data according to the viewing angle of a conventional general liquid crystal display. At this time, the vertical axis of the graph of FIG. 10 is a log scale.

Referring to FIG. 9, when the white is driven in the liquid crystal display according to the first exemplary embodiment of the present invention, the degree of decrease in luminance according to the viewing angle is reduced as compared with the conventional liquid crystal display. As a result, it is expected that a bright screen can be observed even at a large viewing angle.

Referring to FIG. 10, in the liquid crystal display according to the first exemplary embodiment of the present invention, a range of a viewing angle at which CR, which is generally determined to be good, is 10 or more, extends from 0 [°] to 90 [°]. It can be seen that the wide viewing angle is implemented, which can be seen to be a great achievement compared to the conventional liquid crystal display device having a viewing angle range of 0 [degrees] to 60 [degrees].

9 and 10 show only a graph of the liquid crystal display device according to the first embodiment of the present invention, the liquid crystal display device according to the second to fourth embodiments of the present invention also has a wide viewing angle as in the first embodiment. We can expect the effect of securing.

11 is a photograph taken from the left side of the screen of the liquid crystal panel 101 in the liquid crystal display according to the first embodiment of the present invention. The light path converting sheet 103 was disposed and photographed, and FIG. 12 is a photograph taken from the right side of the screen of the liquid crystal panel 101 in the liquid crystal display according to the first embodiment of the present invention. For this purpose, the light path conversion sheet 103 was placed only at the center of the screen of the liquid crystal panel 101 and photographed.

10 and 11, the liquid crystal display according to the first embodiment of the present invention looks at the screen of the liquid crystal panel 101 in the left direction and the screen of the liquid crystal panel 101 in the right direction. In this case, it can be seen that a screen with bright and clear image quality is observed compared to an area where the light path conversion sheet 103 is not formed in the case where the light path conversion sheet 103 is not formed.

10 and 11, only the picture of the liquid crystal display device according to the first embodiment of the present invention is attached, the liquid crystal display device according to the second to fourth embodiments of the present invention is also bright and clear as in the first embodiment You can expect picture quality.

1 is an exploded perspective view showing a conventional general liquid crystal display device.

FIG. 2 is a graph illustrating luminance data according to a viewing angle in the liquid crystal display of FIG. 1. FIG.

3 is a graph illustrating contrast ratio (CR) data according to a viewing angle in the liquid crystal display of FIG. 1.

4 is an exploded perspective view showing a liquid crystal display device according to a first embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view of the optical path changing unit of FIG. 4 and a partial region of the second substrate, and is a cross-sectional view illustrating an optical path; FIG.

FIG. 6 is a view showing a liquid crystal display device according to a second embodiment of the present invention. FIG. 6 is a perspective view showing only an optical path converting means for convenience of description.

FIG. 7 is a view showing a liquid crystal display device according to a third embodiment of the present invention. FIG. 7 is a perspective view showing only an optical path converting means for convenience of description.

FIG. 8 is a view showing a liquid crystal display device according to a fourth embodiment of the present invention. FIG. 8 is a perspective view showing only an optical path converting means for convenience of description.

9 is a graph illustrating luminance data according to a viewing angle in the liquid crystal display of FIG. 4.

FIG. 10 is a graph illustrating contrast ratio (CR) data according to a viewing angle in the liquid crystal display of FIG. 4. FIG.

11 and 12 are photographs taken from the left side and the right side of the screen of the liquid crystal panel of the liquid crystal display of FIG. 4, respectively.

** Description of the symbols for the main parts of the drawings **

101a: first substrate 101b: second substrate

101: liquid crystal panel 102: light source

103, 203, 303, 403: Light Path Conversion Sheet

103a, 203a, 303a, and 403a: first light output unit

103b, 203b, 303b, and 403b: second light exiting part

103c, 203c, 303c, 403c: base portion

104: liquid crystal layer 105: gate line

106: data line 107: thin film transistor

108: pixel electrode 109: color filter

110: common electrode

Claims (11)

A liquid crystal panel in which a plurality of pixels are defined; A light source disposed under the liquid crystal panel to supply light to the liquid crystal panel; And A plurality of first light exit parts disposed on an upper portion of the liquid crystal panel and inclined with respect to an upper surface of the liquid crystal panel to convert a path of light from each pixel of the liquid crystal panel, and parallel to an upper surface of the liquid crystal panel; A light path converting sheet including a plurality of second light exit portions for maintaining a path of light from each pixel of the light source; Liquid crystal display device comprising a. The liquid crystal display of claim 1, wherein the light path converting sheet further includes a base part formed parallel to the liquid crystal panel to form a base of the first light exit part and the second light exit part. The method of claim 1, wherein the plurality of first light exit portions of the light path conversion sheet protrude in the direction of the liquid crystal panel to form a lenticular lens, and the second light exit portion is formed between the plurality of first light exit portions formed in the shape of a lenticular lens. Liquid crystal display device characterized in that the area. The method of claim 1, wherein the plurality of first light exit portions of the light path conversion sheet protrude in a direction of the liquid crystal panel to form a prism, and the second light exit portion is an area between the plurality of first light exit portions formed in a prism shape. , Each of the prism shapes forming the first light exit part includes two surfaces having the same angle with respect to an upper surface of the liquid crystal panel. According to claim 1, wherein the optical path conversion sheet is protruded in the direction of the liquid crystal panel to form a plurality of hexahedral shape, the cross-section cut in the direction perpendicular to the upper surface of the liquid crystal panel is trapezoidal, Wherein the first light exit part is two surfaces having the same angle with respect to an upper surface of the liquid crystal panel, and the second light exit part is a plane parallel to the liquid crystal panel. The method of claim 1, wherein the plurality of first light exit portions of the light path conversion sheet protrudes toward the liquid crystal panel to form an embossed shape, and the second light exit portion is an area between the plurality of first light exit portions formed of an embossed shape. Liquid crystal display device characterized in that. The method of claim 1, wherein the plurality of first light exit portions of the light path conversion sheet protrude in the direction of the liquid crystal panel to form a pyramid shape, and the second light exit portion is an area between the plurality of first regions formed in the pyramid shape. A liquid crystal display device. The display device of claim 1, wherein the pixels defined in the liquid crystal panel form a plurality of vertical pixel columns and horizontal pixel columns. And a stage width of each of the plurality of first light emitting units is smaller than at least one stage width of a vertical pixel column and a horizontal pixel column. 9. The liquid crystal display device according to claim 8, wherein the stage width of each of the plurality of first regions is 20 [mu] m or more and 100 [mu] m or less. The display device of claim 5, wherein the pixels defined in the liquid crystal panel form a plurality of vertical pixel columns and horizontal pixel columns. And a stage width of each of a plurality of hexahedrons constituting the optical path conversion sheet is smaller than at least one of the vertical pixel columns and the horizontal pixel columns. 11. The liquid crystal display device according to claim 10, wherein the stage widths of the plurality of hexahedrons constituting the optical path conversion sheet are 20 [µm] or more and 100 [µm] or less.

Images