JP2014154463A - Light emitting display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting display device in which irregularities of brightness between attachment positions of respective LEDs arranged side by side along a margin of a light guide plate and positions of gaps between the LEDs hardly exert influence to light emission display of a display plate.SOLUTION: A light emitting display device includes: a light guide plate which arranges a plurality of LEDs side by side to each other leaving an interval and causes a light emission surface to emit light with light of respective LEDs; and a display plate which transmits light from the light emission surface and performs light emitting display. Therein, light of the respective LEDs is made incident to the inside from the margin set as a light incident part of the light guide plate, a plate surface set as the light emission surface is disposed so as to perform surface light emission and the plate surface of the display plate is arranged so as to face the light emission surface of the light guide plate and enlarge an interval between the light emission surface and the plate surface of the display plate as approaching the light incident part side. Because the interval between the light emission surface and the plate surface of the display plate is disposed, irregularities of brightness caused between the neighborhood of optical axis of the respective LEDs and the neighborhood of middle position of the respective LEDs are reduced until reaching the display plate and the light emitting display of the display plate can be performed with more homogeneous brightness as a whole.

Description

  The present invention relates to a light-emitting display device in which a display plate emits light by a light guide plate that emits light from an edge and emits light from an edge.

  Various inventions have been disclosed for a so-called edge light type light emitting display device in which light is incident from an edge and a display plate emits light by a light guide plate that emits surface light.

  For example, Patent Document 1 discloses an LED light source, a light guide plate having an incident surface on which light from the LED light source is incident and an output surface from which incident light is propagated and emitted, the incident surface of the light guide plate, and the light source A reflection member provided so as to cover at least one surface other than the emission surface, and provided on the front surface of the emission surface of the light guide plate, allows the emission light of the emission surface to pass through the entire region, and an arbitrary pattern There is disclosed a surface light emitting display device characterized by comprising a display panel for displaying the above.

JP 2001-229723 A

  In the surface-emitting display device disclosed in Patent Document 1, a light guide plate is formed in a wedge shape whose thickness is reduced in a light guide direction from a light incident surface in which a plurality of LEDs are arranged in parallel to a surface opposite to the incident surface. A configuration is described in which the number of times of total reflection inside the light propagating through the light guide plate is increased to increase the light emission efficiency, and the entire display plate is brightly displayed without unevenness. However, the surface-emitting display device reduces unevenness in brightness in the light guide direction of the light of the light guide plate. However, in the vicinity of the light incident surface of the light guide plate, the installation positions of the LEDs arranged side by side and the gaps between the LEDs are arranged. There is a problem that brightness and darkness occur between the display position and unevenness of brightness occurs on the display panel.

  The present invention provides a light-emitting display device in which unevenness in brightness between the installation positions of the LEDs arranged side by side along the edge of the light guide plate and the positions of the gaps does not easily affect the light-emitting display of the display plate. It is.

In order to achieve the above object, the present invention is configured as follows.
That is, the light emitting display device according to the present invention includes a plurality of LEDs arranged in parallel at intervals, a light guide plate that emits light from the light of each LED, and a light emitting display that transmits light from the light emitting surface. A light-emitting display device comprising a display plate,
The light guide plate is provided so as to cause the light of each LED to enter inward from the edge that is the light incident portion, and to cause the plate surface that is the light emitting surface to emit light,
The display plate is disposed such that a plate surface of the display plate is opposed to a light emitting surface of the light guide plate,
The distance between the light emitting surface and the plate surface of the display plate facing the light emitting surface is provided so as to increase toward the light incident portion side.

According to the light emitting display device according to the present invention, a plurality of LEDs arranged in parallel at intervals, a light guide plate that emits light from the light emitted from each LED, and light emitted from the light emitting surface is transmitted. Since the display panel is provided and the light guide plate is provided so as to emit light on the surface of the light guide plate, the light from the light emission surface of the light guide plate is transmitted from the entire display plate and is surface-emitting. Light emission display can be performed.
In addition, by providing the light guide plate so that the light of each LED is incident inward from the edge that has become the light incident portion, and the surface light is emitted, in the vicinity of the light incident portion, near the optical axis of each LED, Although unevenness in brightness occurs between the middle positions of the LEDs, the display plate is arranged so that the plate surface of the display plate faces the light emitting surface of the light guide plate, and the light emitting surface and the display plate Since the distance from the plate surface is increased so as to reach the light incident portion side, the uneven brightness is reduced until the display plate is reached, and the light emission display on the display plate is more uniformly brightened as a whole. Now you can do it.

  Further, each LED and the light guide plate are housed in a hollow box-shaped main body portion, light from the light emitting surface of the light guide plate is transmitted through the display plate, and the window portion of the main body portion to which the display plate is attached It is preferable that the distance between the light guide plate and the display plate can be stably maintained, so that light emission display with uniform brightness on the display plate can be stably performed.

  Further, if an attachment part for attaching the main body part to a support such as a column is formed on the base part of the main body part provided on the light incident part side of the light guide plate of the main body part, a light guide plate and a display plate Since the base is formed with a larger gap than the other side and formed thicker than the other side, it can be attached to the support.

  According to the light emitting display device according to the present invention, the difference in brightness produced between the installation positions of the LEDs arranged side by side and the positions of the gaps hardly appears on the display board, and the overall brightness is more uniform. Now, the display board can be lit and displayed.

One embodiment of a light emitting display device according to the present invention is shown, (A) is a plan view, and (B) is a front view. It is a right view of FIG. It is AA sectional drawing of FIG. It is a fragmentary sectional view of the vicinity of the light emission part which shows the outline | summary of the vertical cross section of the light emission display apparatus of FIG. FIG. 4 is an enlarged view of the vicinity of the left side surface of the light emitting display device of FIG. 3. 3 is an enlarged view of the vicinity of the right side surface of the light emitting display device. FIGS. 1A and 1B are plan views and FIG. 2B are front views showing an embodiment of a column to which the light emitting display device of FIG. 1 is attached. It is a cross-sectional view of FIG. It is sectional drawing which shows the state before attaching the light emission display apparatus of FIG. 1 to the support | pillar of FIG. It is sectional drawing which shows the state which attached the support | pillar of FIG. 9 and the light emission display apparatus.

Embodiments of the present invention will be specifically described with reference to the drawings.
In the drawings, reference numeral 1 denotes a light emitting display device.
The light emitting display device 1 of this embodiment includes a main body 2 formed in a hollow trapezoidal box shape. One rectangular display board 3 is attached to each of the front side and the rear side of the main body 2, and is formed so as to represent a display (not shown) provided on each display board 3. Yes.

3 is a cross-sectional view taken along the line AA in FIG.
Each of the display boards 3 is formed in a rectangular plate shape, and is internally provided in the main body 2. Specifically, the front plate part 20a on the front side that forms the main body part 2 formed in the shape of a hollow box and the rear plate part 20b that forms the rear surface side have window portions that penetrate into a square shape with rounded corners. Each display panel 3 is attached in contact with the inner surface of the front plate portion 20a and the rear plate portion 20b so as to block each window portion 22 respectively.

The main body 2 includes a light-emitting unit 5 including the LED 51 as a light-emitting body, and a light guide plate 4 that emits light by light from the light-emitting unit 5.
The light guide plate 4 is formed in a rectangular plate shape larger than the window portions 22, and is attached so that the plate surface is opposed to the inner side surface of each display plate 3. Specifically, the light guide plate 4 is attached to the inside of the main body 2 so as to be disposed in the middle of each display plate 3 with the plate surfaces on both sides, which are the light emitting surfaces 42, facing forward and rearward.
And the said light emission part 5 is formed in the elongate body shape, is attached so that the side edge of the said light-guide plate 4 may be followed, and is arrange | positioned along the left edge of the light-guide plate 4 in FIG. Then, light emitted from the LED 51 is caused to enter the inner side of the light guide plate 4 that is the light incident portion 41 so that the front surface and the rear surface of the light guide plate 4 that are the light emitting surface 42 emit surface light. Is provided.
Each of the display panels 3 is formed so as to have a light transmission property, and the light emitting display device 1 of the present embodiment transmits light from the light guide plate 4 that emits surface light to each display plate 3 and from the window portion 22. The display provided on each display panel 3 is radiated outward from the main body 2 so as to emit light.

4 is a partial cross-sectional view in the vicinity of the light-emitting portion 5 showing an outline of the vertical cross-section of the light-emitting display device 1 in FIG. 1, and FIG. 5 is an enlarged view in the vicinity of the left side surface of the light-emitting display device 1 in FIG. FIG. 3 is an enlarged view of the vicinity of the right side surface of the light emitting display device 1.
The light emitting unit 5 includes a substrate 52 formed in a long plate shape, and the LEDs 51 are arranged in a row on the substrate 52 with an interval therebetween. The substrate 52 is housed and attached inside a holder 53 formed in a long body having a U-shaped cross section, and the light emitted from each LED 51 passes through the U-shaped opening portion of the holder 53. It is designed to radiate outward.
The light emitting part 5 is attached along the left edge, which is the light incident part 41 of the light guide plate 4, with its longitudinal direction turned up and down.
Specifically, the light emitting section 51 is attached by inserting the light incident section 41 of the light guide plate 4 over the entire length from the opening portion of the holder 53 to the inside thereof, so that the light emitted from each LED 51 can be efficiently used. The light incident portion 41 is attached so as to enter the inside of the light guide plate 4.
In addition, in FIG. 4, illustration of the holder 53 is abbreviate | omitted for the simplification of a figure.

The light guide plate 4 is formed to emit light on the front surface and the rear surface that are formed as the light emitting surface 42 by the light incident from the light incident portion 41.
The light guide plate 4 is formed so that the light incident from the light incident portion 41 travels through the light guide plate 4 while being repeatedly reflected on the inside, and the light emitting surfaces 42 emit light as a whole.
Since the LEDs 51 are arranged at intervals, the light emission of the light emitting surfaces 42 of the light guide plate 4 is caused by the brightness of the portion B near the optical axis of the LEDs 51 in the vicinity of the light incident portion 41. Light is emitted brighter than the portion D close to the intermediate position, and uneven brightness occurs between the portion B and the portion D.

As shown in FIG. 3, the display plates 3 are arranged at intervals from the light emitting surfaces 42 of the light guide plate 4.
For this reason, the uneven brightness of the light emitting surface 42 generated between the portion B and the portion D, which occurs in the vicinity of the light incident portion 41 of the light guide plate 4, is alleviated until reaching each display plate 3. The light emission display by the display board 3 can be performed with more uniform brightness.
Further, the interval between the light emitting surface 42 of the light guide plate 4 and the plate surface of each display plate 3 opposed thereto is the interval S1 in the vicinity of the left edge of the light guide plate 4 formed as the light incident portion 41. It is provided so as to be larger than the interval S2 in the vicinity of the right edge of the light guide plate 4 which is the tip of the optical axis. With this configuration, unevenness in brightness of the light emitting surface 42 in the vicinity of the light incident portion 41 is more effectively mitigated until reaching each display plate 3, and light emission display by each display plate 3 can be performed with more uniform brightness. it can.
Further, each display panel 3 is attached in contact with the inner surfaces of the front plate portion 20a and the rear plate portion 20b of the main body portion 2, and the main body is near the left side plate portion 24 where the light emitting portion 5 is disposed. The thickness of the base portion 21 of the portion 2 in the front-rear direction is larger than the thickness of the tip portion 25 of the main body portion 2 near the right side plate portion 26. By providing the main body 2 as described above, unevenness in brightness of the light emitting surface 42 in the vicinity of the light incident portion 41 can be more effectively reduced to reach each display plate 3, and the main body 2 can be provided in a compact manner. Can do.

In the light emitting display device 1 of the present embodiment, an attachment portion 23 for attachment to a support such as a support column is formed on the base portion 21 of the main body portion 2. The attachment portion 23 of the main body 2 of the present embodiment is formed in a plate shape, and the front plate portion 20a and the rear plate portion 20b of the main body portion 2 are formed to extend to the left side of the left plate portion 24, respectively. The attachment portion 23 and the left side plate portion 24 are formed so as to constitute a substantially U-shaped cross section opening leftward.
A circular through-hole H is formed in the mounting portion 23 at intervals in the vertical direction, and a total of eight through-holes H are formed in each of the mounting portions 23.
The attachment portion 23 is configured to attach the main body portion 2 to the support body by screwing a member such as a screw inserted into the through hole H to a support body such as a support column.

7 shows an embodiment of a column 8 for mounting the light emitting display device 1 of FIG. 1, (A) is a plan view, (B) is a front view, and FIG. 8 is a cross-sectional view of FIG. is there.
The support column 8 of the present embodiment is formed by aluminum extrusion, and its cross section has a hollow cross shape, and includes four projecting portions 82 that extend in the front-rear and left-right directions.
Each projecting portion 82 of the support column 8 is formed with an attachment groove 83 that opens outward from the upper end to the lower end of the support column 8. A cover member 85 that closes the attachment groove 83 from the outside is detachably attached to the tip of the protruding portion 82 of the column 8.
Each of the mounting grooves 83 becomes narrower from the bottom to the opening and is formed so that the opening edge protrudes inward, so that the fixing member 84 wider than the opening edge is prevented from coming into the mounting groove 83. Can be inserted into the state.

9 is a cross-sectional view showing a state before the light-emitting display device 1 of FIG. 1 is attached to the column 8 of FIG. 8, and FIG. 10 is a cross-sectional view showing a state of attaching the column 8 and the light-emitting display device 1 of FIG. It is.
9 and 10, illustration of the inside of the light emitting unit 2 such as the light emitting unit 5 is omitted for simplification of the drawings.
9 and 10, the light emitting display device 1 is attached using two projecting portions 82 </ b> A that project in the opposite direction among the four projecting portions 82 formed on the support column 8. In each of the protrusions 82A, the attached cover member 85 is partially removed, and the fixing member 84 is inserted into the attachment groove 83. Each fixing member 84 is formed in a flat plate shape whose width is wider than the opening edge of the mounting groove 83 and is long in the vertical direction, and is inserted into the mounting groove 83 in a retaining state. Each fixing member 84 is formed with a female screw hole 84a at a position corresponding to each through hole H of the mounting portion 23 of the light emitting display device 1.
In the light emitting display device 1, the inner surface of each mounting portion 23 of the main body 2 is brought into contact with the tip of each projecting portion 82 of the column 8, and the male screw of the screw N is inserted into the through hole H formed in each mounting portion 23. The portion is inserted and screwed into the female screw hole of the fixing member 84 and attached to the column 8.

  The upper plate portion 20c that forms the upper surface of the main body portion 2 and the lower plate portion 20d that forms the lower surface respectively extend to the left side of the left plate portion 24 to form an extended portion 27. Has an upper end and a lower end connected to the extending portions 27, respectively. The left end of each extending portion 27 is formed in a contact portion 27 a having a shape corresponding to the outer shape of the support column 8. When the light emitting display device 1 is attached to the support column 8, It is provided so that the outer surface of the support | pillar 8 may oppose. For this reason, when the light-emitting display device 1 attached to the support column 8 receives an external force, the contact portion 27a is brought into contact with the support column 8 to reduce movement and deformation of the light-emitting display device 1, and light emission attached to the support column 8 is achieved. The display device 1 is prevented from rattling, damage, dropout, and the like.

In the light emitting display device 1 according to the present embodiment, the attachment portion 23 is formed on the base portion 21 having a larger thickness in the front and rear thicknesses of the main body portion 2. Strength can be formed more strongly and the main-body part 2 can be more firmly attached to the support | pillar 8 which is a support body.
Further, in the light emitting display device 1 of the present embodiment, the attachment portion 23 formed on the base portion 21 is attached to the support column 8 and the tip portion 25 is extended from the support column 8 to the side. Since the thickness of the front and rear is made smaller than that of the base 21 and the weight thereof is made lighter, the load of the weight of the main body 2 in the mounting portion 23 becomes smaller, and the light emitting display device 1 is more stably supported. 8 can be attached.

  In the embodiment shown in FIGS. 1 to 10, the base 23 is provided in the vicinity of the left side surface of the main body 2 so that the front and rear thicknesses are increased by incorporating the light emitting unit 5, but is not limited thereto. For example, the light emitting unit 5 may be provided in the vicinity of the upper surface or the lower surface of the main body 2 and the base 23 having a large thickness in the front and rear may be formed near the upper surface or the lower surface of the main body.

DESCRIPTION OF SYMBOLS 1 Light emission display apparatus 2 Main body part 21 Base part 22 Window part 23 Attachment part 24 Left side board part 25 Front part 26 Right side board part 27 Extension part 3 Display board 4 Light guide plate 41 Light incident part 42 Light emission surface 5 Light emission part 51 LED
52 Substrate 53 Holder 8 Prop 82 Projection 83 Mounting groove 84 Fixing member 85 Cover member H Through hole N Screw

Claims (3)

A light-emitting display device comprising a plurality of LEDs arranged in parallel at intervals, a light guide plate that emits light from the light emitted from each LED, and a display plate that transmits light from the light-emitting surface to display light. And
The light guide plate is provided so as to cause the light of each LED to enter inward from the edge that is the light incident portion, and to cause the plate surface that is the light emitting surface to emit light,
The display plate is disposed such that a plate surface of the display plate is opposed to a light emitting surface of the light guide plate,
A light-emitting display device, characterized in that the distance between the light-emitting surface and the plate surface of the display plate facing the light-emitting surface is increased toward the light incident side.   Each LED and the light guide plate are housed in a hollow box-shaped main body, light from the light emitting surface of the light guide plate is transmitted through the display plate, and the outside of the window portion of the main body to which the display plate is attached The light-emitting display device according to claim 1, wherein the light-emitting display device is adapted to emit light to a light source.   The attachment part for attaching the said main-body part to support bodies, such as a support | pillar, is formed in the base part of the said main-body part provided in the light-incidence part side of the light-guide plate of the said main-body part. The light-emitting display device described in 1.

Images