WO2010140573A1 - Feuille pour éclairage et dispositif d'entrée mettant en œuvre celle-ci - Google Patents

Feuille pour éclairage et dispositif d'entrée mettant en œuvre celle-ci Download PDF

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Publication number
WO2010140573A1
WO2010140573A1 PCT/JP2010/059230 JP2010059230W WO2010140573A1 WO 2010140573 A1 WO2010140573 A1 WO 2010140573A1 JP 2010059230 W JP2010059230 W JP 2010059230W WO 2010140573 A1 WO2010140573 A1 WO 2010140573A1
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WO
WIPO (PCT)
Prior art keywords
light
sheet
illumination
light emitting
blocking line
Prior art date
Application number
PCT/JP2010/059230
Other languages
English (en)
Japanese (ja)
Inventor
直樹 伊藤
徹 伊藤
邦明 鈴木
和宏 高橋
Original Assignee
アルプス電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Publication of WO2010140573A1 publication Critical patent/WO2010140573A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/036—Light emitting elements
    • H01H2219/044—Edge lighting of layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/056—Diffuser; Uneven surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/062—Light conductor

Definitions

  • the present invention relates to an illuminating sheet and an input device using the illuminating sheet that can individually illuminate illuminating portions provided at a plurality of locations with light propagating through a common sheet.
  • an input device for a portable electronic device an input device for a keyboard device, or an in-vehicle input device, a push button type operation body is provided with an illuminating unit that expresses characters, symbols, and other patterns, and is provided inside the device.
  • the light emitted from a light source such as a light emitting diode is applied to the illuminating unit so that it can be illuminated.
  • an illuminating unit that performs a plurality of types of display on the operating body, and select and illuminate a different illuminating unit each time the input mode is switched.
  • the portable terminal device disclosed in the following Patent Document 1 is provided with a numeric display area, a kana display area, and an alphabet display area on the same key top, and three thin films individually facing each area on the back of the key top.
  • An electroluminescent backlight is provided. When any one of the three backlights is selected and turned on, the display area facing the backlight is illuminated.
  • a red number pattern, a green kana pattern, and a black alphabet pattern are printed on the same key top.
  • a red LED and a green LED are provided behind the key top.
  • a light guide rubber sheet is provided on the backs of a plurality of key tops each having an illumination part, and light emitted from the light emitting diode is contained in the light guide rubber sheet.
  • a partition wall arranged so as to crush the light guide rubber sheet is provided between adjacent key tops, and light guided to the inside of the light guide rubber sheet is individually given to each key top. To be able to.
  • JP 2006-60334 A Japanese Patent Laid-Open No. 2001-273732 Japanese Patent Laid-Open No. 10-275535
  • Patent Document 1 and Patent Document 2 are both provided on the key top by arranging a plurality of light sources on the back of the same key top and selecting one of the light sources to emit light. Any one of a plurality of illumination units is selected and illuminated.
  • a structure in which a plurality of light sources are arranged behind the same key top it is difficult to make the input device thin.
  • a light-guiding rubber sheet that transmits light is arranged on the back of the key top, so that the light source from the light source is directly compared to a structure that gives light directly to the key top.
  • a plurality of light guiding sheets are provided below the key top, and the respective light guides are provided. It is necessary that the light-sensitive sheet is individually opposed to different illumination parts of the key tops, and light is individually given to the respective light-guiding sheets from different light sources.
  • the light guide sheet is pushed and deformed with the key top and the movable contact is operated via the light guide sheet to open and close the contact.
  • the present invention solves the above-described conventional problems, and a light guide sheet is disposed on the back of the operation body, and a plurality of illumination sections provided on the operation body can be selected and illuminated.
  • An object of the present invention is to provide an input device using a sheet and an illumination sheet.
  • the present invention is an illumination sheet that is formed of a light guide sheet and that guides light emitted from a light source to the inside of the sheet and gives it to the operating body.
  • the light guide sheet includes a deformation region that is deformed by a pressing force from the operation body, a first light emitting unit that emits light forward in which the operation body is disposed, and the deformation region with respect to the deformation region.
  • a second light emitting part provided on the opposite side of the first light emitting part and emitting light forward; and a first light source from which the light from the first light source enters the first light emitting part A first light incident portion and a second light incident portion into which light from the second light source is incident toward the second light emitting portion,
  • a light shielding line that penetrates in the thickness direction or has a thickness dimension reduced from at least one surface thereof extends continuously or intermittently in a direction crossing the first direction.
  • the light blocking line is between the first light incident part and the second light emitting part and between the second light incident part and the first light emitting part.
  • a plurality of strips are provided at intervals in the direction.
  • a light blocking line provided continuously or intermittently on the light guide sheet is provided, and a plurality of light blocking lines are provided in the first direction. Therefore, light from different light sources can be individually given to the first light emitting unit and the second light emitting unit.
  • the light shielding line of the present invention is formed by a through portion penetrating the light guide sheet in the thickness direction, or formed by a groove portion having a thickness dimension reduced from one side, or a thickness dimension reduced from both sides.
  • the light blocking line is formed at the penetrating portion, the effect of blocking light is increased.
  • the light blocking line is formed in the groove, the rigidity of the light guide sheet can be increased, and it becomes easy to prevent dust from entering through the light guide sheet.
  • the light blocking line that penetrates the light guide sheet in the thickness direction is formed so that one edge portion and the other edge portion of the light guide sheet are not continuous. Since an integrated light guide sheet that is not separated from each other can be arranged on the back of the operating body, assembly work is easy.
  • the first light emitting portion and the second light emitting portion are provided with a plurality of uneven portions or a scatterer on the surface of the light guide sheet.
  • any one of the light blocking lines is present on all virtual lines extending in the first direction in the first light emitting unit and the second light emitting unit. .
  • a first light blocking line and a second light blocking line are provided with an interval in a first direction, and the first light blocking line and the second light blocking line are: There is provided a third light blocking line that does not extend to the edge of the light guide sheet and extends between the first light blocking line and the second light blocking line adjacent to the edge. Is.
  • the plurality of light blocking lines provided at intervals in the first direction are each an intermittent line, and the intermittent part of one light blocking line and the intermittent part of the other light blocking line Are arranged so as not to overlap in the first direction.
  • the first light incident portion and the first light emitting portion are provided by making a structure in which one of the light blocking lines necessarily exists on the virtual line extending in the first direction.
  • the region and the region where the second light incident portion and the second light emitting portion are provided can be optically effectively separated, and light crosstalk between the two regions can be minimized. .
  • an inner edge portion of the light blocking line is inclined with respect to a thickness direction of the light guide sheet.
  • the probability of light passing through the light blocking line can be reduced, and light crossing can be performed between areas located on both sides of the light blocking line. Talk can be reduced.
  • the present invention provides the light guide sheet between the first light incident part and the second light output part and between the second light incident part and the first light output part. It can be configured that the surface is provided with a light diffusion portion in which a plurality of uneven portions or a diffusion structure is formed.
  • the light blocking line may be provided at a position overlapping the deformation region.
  • the same light guide sheet is provided with another deformation region that receives a pressing force from another operation unit in addition to the deformation region, and the other deformation region overlaps the light blocking line. It may not be.
  • the light guiding sheet is not divided by this light blocking line.
  • the reaction force when it is made to fall is not greatly reduced. Therefore, even in the same input device, even if there are a mixture of deformation areas where the light blocking lines overlap and deformation areas where the light blocking lines do not overlap, there is a large variation in the pressing reaction force of the operating body pressing each deformation area. Does not occur.
  • the input device of the present invention is characterized in that a movable contact provided by a metal plate is provided on the back surface of the pressing portion of the illumination sheet described above.
  • the movable contact and the illuminating sheet are provided to be overlapped on a substrate, the fixed contact facing the movable contact on the surface of the substrate, and the light source that gives light to the light incident portion And are provided.
  • the operation body that presses the deformation region is provided on a surface of the illumination sheet, and the first light emission unit and the second light emission unit are the same in the operation body.
  • the operation body is opposed to the first light emitting portion illuminated by the light emitted from the first light emitting portion, and the second light illuminated by the light emitted from the second light emitting portion.
  • the illumination part is provided.
  • a single light guide sheet is arranged on the back of an operating body such as a key top, and light can be individually applied from different light sources to a plurality of light emitting sections facing the same operating body. become.
  • the light guide sheet is not separated, and most of the deformation region can be covered with the light guide sheet. There is no great variation in the repulsive force when pressing the deformation area. Therefore, even if the light blocking line is provided in the deformation area, the operation feeling of pressing the operating body does not vary greatly.
  • FIG. 1 is an exploded perspective view showing an illumination sheet and an input device according to an embodiment of the present invention
  • FIG. 2A shows a part of the input device
  • FIG. 2A is a front view of the operating body
  • FIG. 2B is a cross-sectional view of the input device at a portion where the operating body is provided.
  • the expanded sectional view which shows sectional drawing of the light-shielding line formed by penetrating the sheet
  • FIG. 5 is a diagram for explaining the effects of the plurality of embodiments shown in FIG.
  • FIG. 5 is a diagram for explaining the effects of the plurality of embodiments shown in FIG.
  • the hard substrate 2 is a rectangle having an upper edge portion 2c and a lower edge portion 2d which are parallel to each other and extend in the X direction, which is the first direction. Is formed.
  • the fixed contact 3 On the surface 2a of the hard substrate 2, fixed contacts 3 are provided at five locations.
  • the fixed contact 3 has an outer contact 3a formed in a ring shape and an inner contact 3b formed inside the outer contact 3a.
  • the outer contact 3a and the inner contact 3b are individually connected to a lead pattern wired inside the hard substrate 2.
  • a light emitting diode 4 is mounted on the surface 2a of the hard substrate 2 as a light source.
  • the light emitting diodes 4 are provided at two locations with an interval in the X direction along the inner side of the upper edge portion 2c of the hard substrate 2, and at five locations with an interval in the X direction along the inner side of the lower edge portion 2d. Is provided.
  • a movable contact holding sheet 5 is installed on the surface 2 a of the hard substrate 2.
  • the movable contact holding sheet 5 is an insulating and flexible synthetic resin sheet such as PET (polyethylene terephthalate).
  • the movable contact holding sheet 5 has positioning holes 5a at three locations, and the respective positioning holes 5a are fitted into the positioning projections 2b so that the movable contact holding sheet 5 is positioned on the surface 2a of the hard substrate 2.
  • the movable contact 6 is attached to the back surface of the movable contact holding sheet 5 by being adhered.
  • the movable contact 6 is made of a metal leaf spring material that is electrically conductive and springy, and has a dome shape that is convex in a direction away from the surface 2 a of the hard substrate 2.
  • a spacer sheet 7 is provided between the surface 2 a of the hard substrate 2 and the movable contact holding sheet 5.
  • the spacer sheet 7 is bonded to both the surface 2 a of the hard substrate 2 and the movable contact holding sheet 5.
  • circular holes 7 a are formed at positions corresponding to the respective movable contact holding sheets 5.
  • the movable contact 6 bonded to the movable contact holding sheet 5 is located inside the hole 7a, and the peripheral edge thereof is in contact with the outer contact 3a to be conducted.
  • an illumination sheet 20 is overlaid on the surface of the movable contact holding sheet 5.
  • a light absorbing sheet 8 is provided between the movable contact holding sheet 5 and the illumination sheet 20.
  • the light absorbing sheet 8 has a hue that absorbs light such as black or dark green, and is bonded to both the movable contact holding sheet 5 and the illumination sheet 20.
  • the light absorbing sheet 8 is formed with positioning holes 8 a at three locations, and the positioning holes 8 a are fitted into the positioning protrusions 2 b so that the light absorbing sheet 8 is positioned with respect to the hard substrate 2.
  • windows 9a, 9b, 9c, 9d, 9e are opened.
  • the movable contact 6 is positioned inside each of the windows 9a, 9b, 9c, 9d, 9e.
  • the cover sheet 11 is stacked and bonded to the surface of the illumination sheet 20.
  • the back surface facing the illumination sheet 20 is colored white, or the metal layer is thinly formed so that the light propagating through the illumination sheet 20 can be reflected by the back surface.
  • the cover sheet 11 is provided with a light source cover portion 11a.
  • the light source cover portion 11a covers the surface of the light emitting diode 4 mounted on the hard substrate 2 so that the light emitted from the light emitting diode 4 is not directly visible from the front.
  • the cover sheet 11 has windows 12a, 12b, 12c, 12d, and 12e opened.
  • the window 12 a is formed at a position overlapping the window 9 a that opens in the light absorbing sheet 8.
  • the windows 12b, 12c, 12d, and 12e are formed at positions that overlap the windows 9b, 9c, 9d, and 9e, respectively.
  • FIG. 3 is a front view showing the illumination sheet 20 provided in the input device 1.
  • the input device 1 can be divided into a first operation area 41 and a second operation area 42, a third operation area 43, a fourth operation area 44, and a fifth operation area 48.
  • a boundary portion 45 having a predetermined width in the X direction which is the first direction.
  • a boundary 46 having a predetermined width is provided between the first operation area 41 and the third operation area 43
  • a predetermined width is provided between the second operation area 42 and the fourth operation area 44.
  • a width boundary 47 is provided.
  • a boundary portion 49 is provided between the fourth operation region 44 and the fifth operation region 48.
  • FIG. 4 is a partially enlarged view showing the illuminating sheet 20 located in the first operation area 41 in an enlarged manner.
  • 2A and 2B also show the structure of the first operation region 41.
  • FIG. 4 is a partially enlarged view showing the illuminating sheet 20 located in the first operation area 41 in an enlarged manner.
  • 2A and 2B also show the structure of the first operation region 41.
  • FIG. 4 is a partially enlarged view showing the illuminating sheet 20 located in the first operation area 41 in an enlarged manner.
  • 2A and 2B also show the structure of the first operation region 41.
  • the window 12 a that opens to the cover sheet 11 is opposed to the first operation area 41, and the illumination sheet 20 is covered with the cover sheet 11 at portions other than the window 12 a. Further, a window 9 a that opens to the light absorbing sheet 8 faces the back side of the first operation region 41. The window 12a and the window 9a overlap with each other through the illumination sheet 20 at a substantially coincident position.
  • the window 12b of the cover sheet 11 is provided in front of the second operation region 42, the third operation region 43, the fourth operation region 44, and the fifth operation region 48.
  • 12c, 12d, and 12e face each other, and windows 9b, 9c, 9d, and 9e of the light absorbing sheet 8 face each other on the back side.
  • an operation body 51 is provided in front of the illumination sheet 20 and the cover sheet 11.
  • the operation body 51 is a pressing key.
  • the casing of the electronic device is located in front of the input device 1, and the operation body 51 is supported by the casing so as to be freely pressed.
  • a pressing protrusion 51 a is integrally formed on the back of the operating body 51, and the pressing protrusion 51 a faces the top of the movable contact 6.
  • the operating body 51 is made of a transparent or translucent light guide synthetic resin material. As shown in FIG. 2A, a first illumination unit 52 and a second illumination unit 53 are provided on the surface 51 b of the operation body 51. The 1st illumination part 52 and the 2nd illumination part 53 are arrange
  • the surface 51b of the operation body 51 is covered with a paint or a plating layer and cannot transmit light. However, the paint and the plating layer are removed by the first illumination unit 52 and the second illumination unit 53, and further, When light is applied to the operation body 51 from the back, such as by being colored white, the first illumination unit 52 and the second illumination unit 53 are displayed brightly.
  • the 1st illumination part 52 is a Roman character pattern
  • the 2nd illumination part 53 is a number pattern. However, the illumination part may be formed in any pattern such as a symbol or a pattern.
  • the edge of the window 12 a formed in the cover sheet 11 is located inside the peripheral edge of the operating body 51, and the cover sheet 11 causes the window 12 a to be inside the illumination sheet 20. Can be prevented from leaking forward from the periphery of the operating body 51.
  • the illumination sheet 20 shown in FIG. 3 is formed of a flexible light guide sheet, for example, a transparent polyurethane resin sheet.
  • the illumination sheet 20 has positioning holes 20 a formed at three locations. The positioning holes 20 a are fitted into the positioning projections 2 b formed on the hard substrate 2, and the illumination sheet 20 is attached to the hard substrate 2. Positioned.
  • the illumination sheet 20 has an upper edge portion 20b and a lower edge portion 20c extending in the X direction, which is the first direction, in the Y direction, which is a second direction orthogonal to the X direction.
  • the rectangular shape is longer than the right edge portion 20d and the left edge portion 20e.
  • the illumination sheet 20 is formed with a first boundary light blocking line 21, a second boundary light blocking line 22, a third boundary light blocking line 23, and a fourth boundary light blocking line 30.
  • These boundary light blocking lines 21, 22, 23, and 30 are formed by penetrating portions that penetrate the light guide sheet constituting the illumination sheet 20 on the front and back sides.
  • the first boundary light blocking line 21 has a penetrating portion extending linearly and continuously in the second direction (Y direction), and obliquely extends rightward near the upper edge portion 20b. In each of the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30, the penetrating portion extends linearly and continuously in the second direction.
  • the first boundary light blocking line 21, the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30 all reach the upper edge 20b and the lower edge 20c.
  • the illumination sheet 20 is not divided into left and right by these boundary light blocking lines 21, 22, 23, and 30. Since the boundary light blocking lines 21, 22, 23, and 30 do not reach the upper edge portion 20b and the lower edge portion 20c, the bending rigidity of the illumination sheet 20 in the X direction is prevented from being extremely reduced. Yes.
  • the front of the first boundary light blocking line 21, the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30 is covered with the cover sheet 11.
  • the first boundary light blocking line 21, the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30 are continuous through the second direction (Y direction).
  • the light transmission paths can be easily blocked from each other and are adjacent to each other. This makes it easy to prevent light from leaking to each other in the operation area.
  • the first operation region 41 is located between the first boundary light blocking line 21 and the second boundary light blocking line 22.
  • a region indicated by a circle in the first operation region 41 is a deformation region 24.
  • the deformation area 24 is an area where the movable contact 6 shown in FIG. 2 is provided, and the diameter of the deformation area 24 is the same as the diameter of the movable contact 6.
  • the deformation area 24 is a part of the illumination sheet 20 and is an area that deforms together with the movable contact 6 when the movable contact 6 performs a reverse operation.
  • a first light incident part 20f and a second light incident part 20g are formed in the first operation region 41.
  • the first light incident part 20f and the second light incident part 20g are located away from each other in the first direction (X direction).
  • the first light incident portion 20f is an edge portion of a concave portion formed downward from the upper edge portion 20b of the illumination sheet 20.
  • the light emitting diode 4 mounted on the hard substrate 2 is located in the recess, and the light emitted from the light emitting diode 4 enters the inside of the illumination sheet 20 from the first light incident portion 20f which is the edge of the recess.
  • the second light incident portion 20g is an edge portion of a concave portion formed upward from the lower edge portion 20c of the illumination sheet 20.
  • the light emitting diode 4 mounted on the hard substrate 2 is located inside the concave portion, and the light emitted from the light emitting diode 4 is transmitted from the second light incident portion 20g that is the edge of the concave portion to the inside of the illumination sheet 20. Is incident on.
  • the first light emitting unit 25 is provided on the right side of the deformation region 24.
  • the right end portion of the deformation region 24 is separated from the first light emitting portion 25.
  • a second light emitting unit 26 is provided on the left side of the deformation region 24.
  • the first light emitting part 25 is formed at a position closer to the first light incident part 20f than the second light incident part 20g, and the second light emitting part 26 is the first light incident part 20f. It is formed at a position closer to the second light incident portion 20g.
  • the first light emitting unit 25 and the second light emitting unit 26 are rectangular areas. As shown in FIG. 2B, an uneven portion is formed on the back surface of the illumination sheet 20 in the rectangular region. This uneven portion is formed by applying laser light to the illuminating sheet 20 within the rectangular region, removing the polyurethane resin constituting the illuminating sheet 20 at a pinpoint to form dimples, and arranging a large number of these dimples. Is formed. Or the said uneven
  • a linear, curved, or mesh-like uneven portion may be formed on the back surface of the illumination sheet 20 to diffuse light.
  • the function of diffusing light by forming irregularities on the surface of the sheet by screen printing or inkjet may be exhibited.
  • the uneven structure or the diffusion structure by printing may be formed on the surface side of the illumination sheet 20.
  • a first light blocking line 27 and a second light blocking line 28 are formed between the first light emitting unit 25 and the second light emitting unit 26.
  • the first light blocking line 27 and the second light blocking line 28 are formed at an interval in the X direction, which is the first direction.
  • the first light blocking line 27 has a penetrating portion that penetrates the illumination sheet 20 on the front and back, and extends linearly continuously in the second direction (Y direction). In order to avoid the light incident portion 20f, the light incident portion extends obliquely upward to the left.
  • the second light blocking line 28 also has a continuous straight line extending in the second direction so that the lower end of the drawing is on the right side of the drawing so as to avoid the second light incident portion 20g. Is formed.
  • an upper third light blocking line 29 that is cut downward from the upper edge portion 20b of the illumination sheet 20 and extends between the first light blocking line 27 and the second light blocking line 28
  • a lower third light blocking line 31 is formed which is cut upward from the lower edge portion 20 c and extends between the first light blocking line 27 and the second light blocking line 28.
  • a penetrating portion that penetrates the illumination sheet 20 extends continuously and linearly in the second direction.
  • the first light blocking line 27 and the second light blocking line 28 do not reach the upper edge portion 20b and the lower edge portion 20c of the illumination sheet 20, and accordingly, the first light blocking line 27 and the second light blocking line 20
  • the illumination sheet 20 is not divided into left and right by the blocking line 28. Moreover, it can prevent that the bending rigidity to the 1st direction of the sheet
  • an upper third light blocking line 29 extending from the upper edge portion 20b and a lower third line extending from the lower edge portion 20c are interposed between the first light blocking line 27 and the second light blocking line 28.
  • the light blocking line 31 is formed, when assuming a virtual straight line extending in the first direction (X direction) in the entire region in the second direction (Y direction), On that line, there is a penetrating portion constituting either the first light blocking line 27 and the second light blocking line 28 or the third light blocking lines 29 and 31.
  • any virtual straight line is assumed.
  • there is a penetrating portion constituting either the first light blocking line 27 and the second light blocking line 28 or the third light blocking lines 29 and 31. This is the same when an imaginary straight line from any position of the second light incident portion 20g to any position of the first light emitting portion 25 is assumed.
  • the first light blocking line 27 and the second light blocking line 28 both pass through the inside of the deformation region 24.
  • Light emitted from the light emitting diode 4 and incident from the first light incident portion 20 f propagates through the interior of the illumination sheet 20, and the uneven portion formed on the back surface of the illumination sheet 20 in the first light emission portion 25. And is emitted from the surface of the illumination sheet 20. And the 1st illumination part 52 formed in the operation body 51 shown in FIG. 2 is illuminated from a back part. In addition, light that is incident from the first light incident portion 20f and propagates through the illumination sheet 20 is blocked by the first light blocking lines 27 and the second light blocking lines 28 that are formed in a plurality of strips. .
  • the light that enters from the first light incident portion 20f and tries to propagate along the upper edge portion 20b or the light reflected toward the inside by the upper edge portion 20b is the upper third light blocking line. It is blocked by 29. Further, the light incident from the first light incident portion 20 f, reaching the lower edge portion 20 c and reflected by the lower edge portion 20 c is blocked by the lower third light blocking line 31. Therefore, it is possible to reduce the probability that the light incident from the first light incident portion 20f into the illumination sheet 20 reaches the second light emitting portion 26, and the light emitted forward from the second light emitting portion 26 can be reduced. The amount can be reduced.
  • the light emitted from the light emitting diode 4 and incident on the interior of the illumination sheet 20 from the second light incident portion 20 g is diffused or diffused on the back surface of the illumination sheet 20 in the second light emitting portion 26. Reflected by the structure. Or it is reflected by the uneven
  • the propagation of the light incident on the second light incident portion 20g is doubly blocked by the second light blocking line 28 and the first light blocking line 27, and further to the third light blocking lines 29 and 31. It is blocked. Therefore, the probability that the light incident on the second light incident portion 20g reaches the first light emitting portion 25 can be reduced, and the amount of light emitted forward from the first light emitting portion 25 can be limited.
  • the illumination unit 53 so that the first illumination unit 52 is not illuminated by illuminating only the second illumination unit 53.
  • the first illumination portion 52 and the second illumination of the operating body 51 are changed. It is also possible to simultaneously illuminate the unit 53 with different hues.
  • a light diffusion portion 32 is provided inside the upper edge portion 20b of the illumination sheet 20 and on the left side of the first light incident portion 20f.
  • the light diffusing unit 32 a large number of concave and convex portions are formed on the back surface of the illumination sheet 20, similarly to the first light emitting unit 25 and the second light emitting unit 26.
  • a diffusion structure similar to that of the first light emitting unit 25 and the second light emitting unit 26 is provided.
  • the light diffusing portion 32 When light that enters the first light incident portion 20f from the light emitting diode 4 and travels to the left side of the figure hits the first light blocking line 27 or the third light blocking line 29 in a vertical direction, Light that has entered the space of the penetrating portion is likely to enter the illumination sheet 20 again.
  • the light diffusing portion 32 when the light diffusing portion 32 is provided, the light incident from the first light incident portion 20f is reflected by the concavo-convex portion and the diffusing structure of the light diffusing portion 32 and propagates through the interior of the illumination sheet 20. The amount of light is reduced. Accordingly, it is possible to reduce the amount of light that moves to the left side beyond the third light blocking line 29 and the like.
  • a light diffusing portion 33 having a concavo-convex portion formed on the back surface of the sheet or a diffusing structure is formed. .
  • the light diffusing unit 33 easily suppresses the light that has entered the illumination sheet 20 from the second light incident unit 20g from moving to the right side beyond the third light blocking line 31 on the lower side. Become.
  • the light diffused by the light diffusion parts 32 and 33 is restricted from being emitted toward the operation body 51.
  • the first light blocking line 27, the second light blocking line 28, the third light blocking lines 29, 31 and the light diffusion portions 32, 33 are further provided.
  • the probability that the light incident from the light incident part 20f is given to the second light emitting part 26 can be lowered, and the probability that the light incident from the second light incident part 20g is given to the first light emitting part 25 is lowered. it can.
  • the first light blocking line 27, the second light blocking line 28, and the third light blocking lines 29 and 31 are provided, and the first light blocking lines 32 and 33 are not provided. It is possible to individually emit light from the light emitting unit 25 and the second light emitting unit 26.
  • the light diffusing unit 32 is disposed on one of the light propagation paths from the first light incident unit 20f to the second light emitting unit 26, and the second light incident unit Light emitted from the first light emitting unit 25 and light emitted from the second light emitting unit 26 by disposing the light diffusing unit 33 in any of the light propagation paths from 20 g to the first light emitting unit 25. It is possible to reduce crosstalk.
  • the second operation area 42 shown in FIG. 3 is substantially the same in structure, although there are some differences in shape from the first operation area 41. Therefore, the same reference numerals as those of the first operation area 41 are given to the respective parts of the second operation area 42, and the description thereof is omitted.
  • the first boundary light blocking line 21 is formed at the boundary 45 between the first operation area 41 and the second operation area 42, and this first boundary A light diffusion portion 34 is provided between the upper end of the light blocking line 21 and the upper edge portion 20b of the lighting sheet 20, and the lower end of the first boundary light blocking line 21 and the lower edge portion 20c of the lighting sheet 20 are provided.
  • the light diffusion part 35 is provided between the two.
  • the structure of the light diffusion portions 34 and 35 is the same as that of the light diffusion portions 32 and 33.
  • the light diffusing portions 34 and 35 are provided in the boundary portion 45, it is possible to suppress crosstalk of light between the first operation region 41 and the second operation region 42.
  • the boundary portion 46 light diffusing portions 34 and 35 are provided above and below the second boundary light blocking line 22, and light between the first operation region 41 and the third operation region 43 is transmitted. Leakage can be suppressed.
  • the boundary portion 47 between the second operation region 42 and the fourth operation region 44 light diffusion portions 34 and 35 are formed above and below the third boundary light blocking line 23, and the second operation region 42 and the fourth operation region 44. Light leakage between the operation area 42 and the fourth operation area 44 can be suppressed.
  • light diffusion portions 34 and 35 are formed above and below the fourth boundary light blocking line 30 so that light leakage between the fourth operation region 44 and the fifth operation region 48 can be suppressed. It has become.
  • the third operation region 43 is provided with a concave portion formed upward from the lower edge portion 20c of the illumination sheet 20, and the edge portion of the concave portion is connected to the third light incident portion 20h.
  • the light emitting diode 4 is located in the recess.
  • a deformation region 36 having the movable contact 6 on the back is formed, and a third light emitting portion 37 is formed in the same region as the deformation region 36.
  • the structure of the third light emitting unit 37 is the same as that of the first light emitting unit 25 and the second light emitting unit 26.
  • the light emitted from the light emitting diode 4 enters the interior of the illumination sheet 20 from the third light incident portion 20h, is reflected by the third light exit portion 37, and is illuminated. Is emitted to the front, and is provided to an illumination unit provided in the operation body.
  • the structure of the fourth operation region 44 and the fifth operation region 48 is the same as that of the third operation region 43, and the same reference numerals are given and description thereof is omitted.
  • the light emitting diode 4 that supplies light to the first light incident portion 20f and the light emitting diode 4 that supplies light to the second light incident portion 20g are turned on at different timings.
  • the first illumination unit 52 and the second illumination unit 53 of the operation body 51 can be selected and turned on.
  • the same illumination part of the operation body in front thereof is always illuminated by turning on the light emitting diode 4.
  • the first light blocking line 27 and the second light blocking line 28 pass through the deformation area 24.
  • the repulsive force that acts when the operating body 51 is pressed to deform the deformation region 24 does not greatly decrease. Accordingly, the reaction force when the deformation region 24 is deformed in the first operation region 41 and the second operation region 42 and the third operation region 43, the fourth operation region 44, or the fifth operation region 48. An extreme difference does not occur with the reaction force when the deformation region 36 without the light blocking line is deformed. For this reason, when a plurality of operation bodies are pressed, there is no great variation in operation feeling.
  • FIG. 5 shows the structure of the light blocking line according to various embodiments.
  • FIGS. 7 and 8 simulate changes in the propagation state of light when the respective light blocking lines shown in FIG. 5 are provided. Shows the results.
  • the first light incident portion 20f and the second light incident portion 20g are formed on the illuminating sheet 20, and the first light emitting portion 25 and the second light incident portion 20g. Two light emitting portions 26 are formed.
  • FIG. 5A is a comparative example, and no light blocking line is formed on the illumination sheet 20.
  • FIG. 5B shows an embodiment equivalent to that shown in FIG. 4, in which a first light blocking line 27, a second light blocking line 28, and third light blocking lines 29, 31 are formed. ing.
  • the opening width W of each blocking line is 0.25 mm.
  • a first light blocking line 27a, a second light blocking line 28a, and third light blocking lines 29a and 31a are formed.
  • the edge portions of the respective light blocking lines 27, 28, 29, 31 are formed substantially perpendicular to the surface of the illumination sheet 20.
  • the edges of the respective light blocking lines 27a, 28a, 29a, 31a are the surfaces of the illumination sheet 20. It is inclined by an angle ⁇ with respect to a vertical plane with respect to.
  • the edge of the light blocking line When the edge of the light blocking line is inclined with respect to the vertical plane, the light propagating through the illumination sheet 20 and exiting from the edge of the light blocking line to the inside of the penetrating part is transmitted from the opposing edge. It becomes easy to prevent the light from entering the illumination sheet again.
  • the angle ⁇ is set to 20 degrees. However, if the angle ⁇ is about 5 degrees or more with respect to the vertical plane, the probability that the light re-enters can be reduced any number of times.
  • the illumination sheet 20 shown in FIGS. 5D to 5H includes a plurality of light beams spaced in the X direction between the first light emitting unit 25 and the second light emitting unit 26.
  • the blocking line extends in the Y direction.
  • Each light blocking line has a broken line structure in which penetrating portions and non-penetrating portions penetrating the illumination sheet 20 are alternately arranged in the Y direction.
  • the opening width W in the X direction of each penetrating portion is 0.25 mm.
  • each light blocking line 61 has a length L in the Y direction of the penetrating portion of 1.0 mm and an arrangement pitch Py in the Y direction of the penetrating portion of 1.5 mm.
  • each light blocking line 62 has a length L in the Y direction of the penetrating portion of 0.75 mm, and an arrangement pitch Py in the Y direction of the penetrating portion is 1.5 mm.
  • each light blocking line 63 has a length L in the Y direction of the penetrating portion of 0.5 mm and an arrangement pitch Py in the Y direction of the penetrating portion of 1.5 mm.
  • each light blocking line 64 has a length L in the Y direction of the penetrating portion of 1.0 mm, and an arrangement pitch Py in the Y direction of the penetrating portion is 1.5 mm.
  • each light blocking line 62 has a length L in the Y direction of the penetrating portion of 0.75 mm, and an arrangement pitch Py in the Y direction of the penetrating portion is 1.5 mm.
  • FIGS. 7 and 8 show the results of the simulation. Light was applied from the second light incident portion 20g to the interior of the illumination sheet 20, and the luminance of the light emitted from the surface of the illumination sheet 20 was measured.
  • FIG. 7 shows the average value of the luminance of the second light emitting unit 26 in candela (cd) per unit area (m 2 ).
  • FIG. 8 shows the average value of the first light emitting section 25 in candela (cd) per unit area (m 2 ).
  • FIG. 7 and FIG. 8 by providing a light blocking line in which the penetrating portion is linearly continuous as shown in FIGS. 5B and 5C, light crossing in adjacent regions across the light blocking line is performed. Talk can be reduced. In particular, as shown in FIG. 5C, the crosstalk of the light can be further reduced by giving the inclination ⁇ to the edge of the penetrating portion of the light blocking line.
  • the light blocking lines are adjacent to each other.
  • the crosstalk of light in the region can be reduced.
  • the light blocking line has a broken line structure, when this light blocking line crosses the deformation region 24 of the illumination sheet 20, a single through portion does not cross the deformation region 24.
  • the bending rigidity of the illuminating sheet 20 at 24 is not extremely lowered, and the operation feeling when the movable contact 6 is pushed by the operating body is less affected by the presence of the light blocking line.
  • the light blocking lines are described as having the through portions penetrating the illumination sheet 20 on the front and back sides in a linear form or in the form of intermittent lines.
  • the blocking line may be formed by a continuous line or an intermittent line in which a groove part with a thickness dimension reduced from one side of the illumination sheet 20 or a groove part with a thickness dimension reduced from both sides is formed. .
  • the rigidity of the illuminating sheet 20 can be increased, and dust does not easily pass through the illuminating sheet 20.
  • the light blocking line is formed in the groove portion, it is possible to form the inner surface of the groove portion so as to be inclined with respect to the thickness direction of the sheet as shown in FIG. 6B. With this configuration, the light blocking effect can be increased.

Landscapes

  • Push-Button Switches (AREA)

Abstract

L'invention concerne: une feuille pour éclairage permettant d'éclairer des parties d'éclairage voisines au moyen d'un faisceau lumineux guidé dans la partie intérieure de la feuille tout en permettant de réduire la diaphonie, ainsi qu'un dispositif d'entrée mettant en oeuvre la feuille pour éclairage. Entre une première partie d'incidence du faisceau (20f) et une deuxième partie de sortie du faisceau (26), et entre une deuxième partie d'incidence du faisceau (20g) et une première partie de sortie du faisceau (25), plusieurs lignes de coupure du faisceau (27, 28, 29, 31) sont agencées transperçant la feuille ou creusées dans l'épaisseur de la feuille à partir d'au moins une des surfaces. Grâce à ces lignes de coupure du faisceau, il est possible de dissocier le chemin de propagation du faisceau provenant de la première partie d'incidence du faisceau (20f) du chemin de propagation du faisceau provenant de la partie d'incidence du faisceau (20g), et la sortie de faisceaux distincts au niveau de la première partie de sortie du faisceau (25) et de la deuxième partie de sortie du faisceau (26) se trouve facilitée.
PCT/JP2010/059230 2009-06-02 2010-06-01 Feuille pour éclairage et dispositif d'entrée mettant en œuvre celle-ci WO2010140573A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-132710 2009-06-02
JP2009132710 2009-06-02

Publications (1)

Publication Number Publication Date
WO2010140573A1 true WO2010140573A1 (fr) 2010-12-09

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3223291A4 (fr) * 2014-11-18 2017-11-29 Panasonic Intellectual Property Management Co., Ltd. Dispositif d'opération d'entrée
EP3288055A1 (fr) * 2016-08-24 2018-02-28 Getac Technology Corporation Ensemble interrupteur a cle et son procede de fabrication
US10192695B2 (en) 2016-08-24 2019-01-29 Getac Technology Corporation Keyswitch assembly and manufacturing method thereof
TWI665702B (zh) * 2018-02-14 2019-07-11 達方電子股份有限公司 透光鍵帽、其製造方法及包含該透光鍵帽之發光按鍵

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Publication number Priority date Publication date Assignee Title
JPH04101321U (ja) * 1991-02-18 1992-09-01 スタンレー電気株式会社 照光スイツチ
JP2001273832A (ja) * 2000-03-28 2001-10-05 Pioneer Electronic Corp 電子機器のボタン、及びボタンの照明制御方法
JP2006060334A (ja) * 2004-08-17 2006-03-02 Nec Saitama Ltd キーボタン構造及びそのキーボタン構造を有する携帯端末機器
JP2009117233A (ja) * 2007-11-08 2009-05-28 Alps Electric Co Ltd スイッチ用照光部材、及びスイッチ用照光部材を有するスイッチ装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04101321U (ja) * 1991-02-18 1992-09-01 スタンレー電気株式会社 照光スイツチ
JP2001273832A (ja) * 2000-03-28 2001-10-05 Pioneer Electronic Corp 電子機器のボタン、及びボタンの照明制御方法
JP2006060334A (ja) * 2004-08-17 2006-03-02 Nec Saitama Ltd キーボタン構造及びそのキーボタン構造を有する携帯端末機器
JP2009117233A (ja) * 2007-11-08 2009-05-28 Alps Electric Co Ltd スイッチ用照光部材、及びスイッチ用照光部材を有するスイッチ装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3223291A4 (fr) * 2014-11-18 2017-11-29 Panasonic Intellectual Property Management Co., Ltd. Dispositif d'opération d'entrée
US9978540B2 (en) 2014-11-18 2018-05-22 Panasonic Intellectual Property Management Co., Ltd. Input operation device
EP3288055A1 (fr) * 2016-08-24 2018-02-28 Getac Technology Corporation Ensemble interrupteur a cle et son procede de fabrication
US10192695B2 (en) 2016-08-24 2019-01-29 Getac Technology Corporation Keyswitch assembly and manufacturing method thereof
TWI665702B (zh) * 2018-02-14 2019-07-11 達方電子股份有限公司 透光鍵帽、其製造方法及包含該透光鍵帽之發光按鍵

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