JP2008309635A - Digital timepiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure a clear display of date and time, to maintain a battery life for a long period of time, and to reduce a manufacturing cost. <P>SOLUTION: Respective figures of a minute notation 101 are displayed by seven LEDs 307 forming a figure 8. An hour notation 102 is displayed by one of twelve LEDs 307 arranged corresponding to the displayed positions of time figures in a general analog timepiece. Electric power consumed to display the hour notation 102 can thereby be managed with one LED 307. As a result, power consumption can be cut down, and dispersion of power consumption due to the displayed figures can be reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a digital timepiece, and more particularly to a digital timepiece that displays time or date with a light emitting element.

  Conventionally, a digital clock that displays a time and a calendar using a four-digit number and a colon is known. In these digital watches, a 4-digit number and a colon are displayed by a plurality of segments, and light is generally emitted by using an LED (Light Emitting Diode) for each segment.

  FIG. 22 is a diagram showing the arrangement of LEDs assigned to each segment displaying a 4-digit number and a colon. FIG. 23 is a diagram showing a light shielding plate that has openings that are perforated at positions corresponding to the LEDs shown in FIG. 22 and shields the scattering of light emitted from the LEDs by portions other than the openings. The four-digit number is displayed by seven segments for each character, and an LED 2201 is assigned to each segment. A colon between the second and third digits of a 4-digit number is displayed by two segments, and an LED 2202 is assigned to each segment. The light emitted from each LED (2201, 2202) is scattered upward from the opening 2301 of the light shielding plate 2300. The user recognizes the four-digit number and colon by the scattered light.

  For example, in Patent Document 1, a 4-digit number is displayed in seven segments in units of characters, and the current time is displayed by the light emitting operation of the LED assigned to each segment, so that the surroundings are dark and the pointer of an analog clock Or, even when the time reading of the LCD clock is impossible, the time can be read accurately and easily.

Japanese Patent Laid-Open No. 08-122468

  However, since the invention described in Patent Document 1 displays a 4-digit number and a colon with an LED, a large current is required for the display, and a high-power lithium battery must be mounted. . Further, if the current flowing from the battery is reduced in order to reduce the power consumption, there is a problem that the brightness of the LED is lowered and a clear time display cannot be performed.

  In addition, when the time is displayed in seven segments in units of four-digit numbers, the number of segments used varies depending on the displayed time. For example, when displaying 1:11, only 6 segments are used, but when displaying 20:08, 24 segments are used. For this reason, the voltage consumption of the battery changes due to the variation in the number of segments depending on the displayed time, so that the accuracy of voltage detection deteriorates. As a result, there is a problem that the battery can be used only up to about 55% of the battery capacity, and the life of the battery is shortened.

  In addition, when a 4-digit number is displayed using an inexpensive LED of 1608 size, all segments displaying 4-digit numbers cannot be stored in a small wristwatch for women. For this reason, in the case of a small wristwatch for women, it is necessary to display a 4-digit number using an LED having a size of 1005 smaller than the size of the LED used for a wristwatch for men. However, since the 1005 size LED is more expensive than the 1608 size LED, there is a problem that the manufacturing cost of the watch increases.

  The present invention has been made in view of the above, and an object of the present invention is to provide a digital timepiece capable of displaying a clear date and time, maintaining a battery life for a long period of time, and reducing manufacturing costs. .

  In order to solve the above-described problems and achieve the object, the invention according to claim 1 includes a first light-emitting element having a first predetermined number assigned to the character unit of the first notation in time notation or date notation. And a second light emitting element assigned a second predetermined number smaller than the first predetermined number with respect to a second notation of the time notation or date notation other than the first notation. A light-emitting element group, a driving unit that drives each light-emitting element of the first light-emitting element group and the second light-emitting element group according to the progress of date or time by supplying power, and the driving unit. And an electric power supply unit for supplying electric power.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first opening portion drilled at a position facing each light emitting element of the first light emitting element group, and the second light emitting element. Each light emitting element of the first light emitting element group and the second light emitting element group has a second opening perforated in a shape showing the second notation at a position facing each light emitting element of the group The light emitting device further includes a light shielding member that shields the scattering of the light emitted from the light from a portion other than the first opening and a portion other than the second opening.

  According to a third aspect of the present invention, in the first aspect of the invention, the first opening and the second light emitting element group that are perforated at positions corresponding to the respective light emitting elements of the first light emitting element group. A second opening that is perforated at a position facing each light emitting element, and scattering of light emitted from each light emitting element of the first light emitting element group and the second light emitting element group, Above a light shielding member that shields light by a portion other than the first opening and a portion other than the second opening, the light shielding member, the first light emitting element group, and the second light emitting element group A character indicating the second notation is printed on a back surface at a position facing each light emitting element of the second light emitting element group, and the first light emission is performed from a portion other than the portion where the character is printed. Light is emitted from each light emitting element of the element group and the second light emitting element group. Wherein a plate member that transmits light at a predetermined transmittance, further comprising a.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the pointer is provided above the plate-like member and is rotationally driven to indicate the character of the second notation. And a drive unit that rotationally drives the pointer.

  The invention according to claim 5 is the invention according to claim 1, in which the first opening and the second light emitting element group that are perforated at positions facing each light emitting element of the first light emitting element group. A second opening that is perforated at a position facing each light emitting element, and scattering of light emitted from each light emitting element of the first light emitting element group and the second light emitting element group, A light shielding member that shields light from a portion other than the first opening and a portion other than the second opening; and light emitted from each light emitting element of the first light emitting element group and the second light emitting element group A plate-like member that transmits light at a predetermined transmittance; and provided below the plate-like member and above the first light-emitting element group and the second light-emitting element group, and the second light-emitting element group A character indicating the second notation is printed at a position facing each light emitting element. And a transparent member that transmits light emitted from each light emitting element of the first light emitting element group and the second light emitting element group from a part other than the part on which the characters are printed. Features.

  The invention according to claim 6 is the invention according to any one of claims 3 to 5, wherein each light emitting element of the first light emitting element group and the second light emitting element group has the first opening. And the second opening.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the first light emitting element group displays each character of the first notation by a 7 segment light emitting element. It is characterized by that.

  The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the second light emitting element group is arranged at an interval of 30 degrees on an outer periphery of the first light emitting element group. It has 12 light emitting elements.

  The invention according to claim 9 is the invention according to any one of claims 1 to 7, wherein the second light emitting element group is arranged at an interval of 15 degrees on an outer periphery of the first light emitting element group. It has 24 light emitting elements.

  According to the first aspect of the present invention, the number of light emitting elements assigned to the second notation other than the first notation in the time notation or date notation is the number of light emitting elements assigned to the character unit of the first notation. By reducing the power consumption, it is possible to reduce power consumption, and to display a clear date and time with low power consumption. In addition, since the number of light-emitting elements used by displayed characters is less varied, power consumption does not change greatly depending on displayed characters, and as a result, battery life can be maintained for a long time. Play.

  According to the second aspect of the present invention, the light-shielding plate is provided with an opening that is perforated in a shape that indicates the second notation, and scattering of light emitted from each light-emitting element of the second light-emitting element group is prevented. Since the second notation is digitally displayed by characters while being shielded from light by a portion other than the second opening, the time notation or date notation can be easily distinguished.

  Further, according to the invention according to claim 3 or 5, the second notation is digitally displayed by projecting the shadow of the character printed on the back surface of the plate-like member or the front surface of the transparent member. Even in the case of being composed of complicated characters, the second notation can be digitally displayed by the characters.

  According to the invention of claim 4, since the normal analog clock is mounted, there is an effect that it is possible to realize a digital clock capable of simultaneously displaying the time notation and the date notation at a low cost.

  Moreover, according to the invention concerning Claim 6, since each light emitting element of the 1st light emitting element group and the 2nd light emitting element group was inserted in the 1st opening part and the 2nd opening part, There is an effect that the light emitted from the light emitting element can be shielded from light scattering to portions other than the first opening and the second opening with higher accuracy.

  Also, according to the invention of claim 7, since each character of the first notation is displayed by the 7-segment light emitting element, the second notation can be more easily distinguished. .

  According to the invention of claim 8, the second light emitting element group includes the second light emitting element group having twelve light emitting elements arranged at intervals of 30 degrees on the outer periphery of the first light emitting element group. Since the second notation is shown, for example, the time notation or the month notation is displayed at the same position as a general analog clock, so that the time notation or date notation can be easily determined. There is an effect.

  According to the invention of claim 9, the second notation is indicated by the second light emitting element group having 24 light emitting elements arranged at intervals of 15 degrees on the outer periphery of the first light emitting element group. Therefore, there is an effect that the time notation can be shown in a 24-hour display.

  Exemplary embodiments of a digital timepiece according to the present invention will be explained below in detail with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is an explanatory view showing a display example of time notation displayed by the digital timepiece according to the present embodiment. The time notation shown in FIG. 1 represents 12:34. As described above, in the present embodiment, when a two-digit character indicating the notation 101 displayed in the range of 00 to 59 is displayed by the LED of seven segments in units of characters and displayed in the range of 00 to 12 Each of the notations 102 is displayed by any one of the LEDs arranged facing the position where the time digits are displayed in a general analog timepiece. The minute notation 101 indicates the first notation, and the hour notation 102 indicates the second notation.

  The notation displayed by the digital clock according to the present embodiment may be a date notation. The date notation shown in FIG. 2 represents December 31st. As described above, in the present embodiment, the notation 201 of the day displayed in 01 to 31 is displayed by the LED of 7 segments in two-digit characters, and the month displayed in 01 to 12 is displayed. Each notation of the notation 202 is displayed by one LED. The day notation 201 indicates the first notation, and the month notation 202 indicates the second notation.

  Furthermore, in the digital timepiece according to the present embodiment, the two-digit character displayed by the LED of seven segments in character units may be the last two digits of the second and year. When the second displayed in 00 to 59 or the last two digits of the year displayed in 00 to 99 is displayed, the last two digits of the second or year are displayed in seven segments for each character. The last two digits of the second or year indicate the first notation.

  FIG. 3 is a cross-sectional view showing the structure of the digital timepiece 300 according to the first embodiment. As shown in the figure, the digital timepiece 300 includes a back cover 301, a battery 302, a rigid board 303, an LED drive circuit 304, a light shielding plate 306, an LED 307, a dial 308, and an FPC board 309. , A case 310 and a windshield 311.

  A digital timepiece 300 according to the present embodiment includes a substantially cylindrical case 310, a back lid 301 that is attached to the bottom surface side end surface of the case 310 with a screw, and is a nonmagnetic material other than plastic or a ferromagnetic material, and a case 310. The windshield glass 311 is attached to the upper surface side end surface (that is, the front surface side of the digital timepiece 300) to protect the internal module. The outer shape of the digital timepiece 300 is formed by the case 310, the back cover 301, and the windshield glass 311. Forming.

  The digital timepiece 300 includes a battery 302, an FPC board 309 having a bent portion 305 and a substantially inverted cross section in an outer shape formed by the case 310, the back cover 301, and the windshield 311. It has an internal structure in which a rigid substrate 303, which is a substrate using a hard material, an LED 307, an LED drive circuit 304 that drives the LED 307 to emit light, a light shielding plate 306, and a dial plate 308 are housed.

  Specifically, the battery 302 is housed in the lowermost part of the outer shape formed by the case 310, the back cover 301, and the windshield 311, the FPC board 309 is provided above the battery 302, and the bent portion 305 of the FPC 309 is provided. A rigid substrate 303 is provided on the lower surface. In the digital timepiece 300, the LED driving circuit 304 is further mounted on the rigid board 303, a plurality of LEDs 307 are arranged on the surface above the bent portion 305 of the FPC board 309, and the LED driving is performed by the FPC board 309. The circuit 304 and the LED 307 are connected. The digital timepiece 300 has a structure in which a light shielding plate 306 is provided above the LEDs 307 and a dial plate 308 is laminated on the light shielding plate 306.

  The battery 302 constitutes a power supply and is a power supply unit that supplies power to an LED drive circuit 304 described later. In this embodiment, a 3V primary battery is used.

  The LED drive circuit 304 is a circuit that causes the LED 307 to emit light by supplying a forward current to the LED 307 by supplying power from the battery 302 according to the progress of time as time passes.

  The dial plate 308 is a plate-like member on which time notation or date notation is projected. When light is emitted from the LED 307, it is guided by a light-shielding plate 306, which will be described later, and the light is transmitted with a predetermined light transmittance so that the time notation is displayed. Or the date notation is displayed as a digital display. The light transmittance of the dial 308 is preferably 30 to 70%. Further, the dial 308 is preferably coated with a white paint for light diffusion on the back surface with a predetermined light transmittance. The light emitted from the LED 307 is well scattered in the openings (501, 502) by painting the dial plate 308, thereby realizing a clear digital display.

  The LED 307 constitutes a light emitting element and is a light emitting diode that emits light when energized from the LED drive circuit 304. In this embodiment, thin chip LEDs (for digital display) are used, and each thin chip LED is fixed to the FPC board 309.

  FIG. 4 is an explanatory view showing an arrangement example of the plurality of LEDs 307 arranged on the FPC board 309. In the present embodiment, a first LED 307 having seven LEDs 307 assigned to each character is provided on the FPC board 309 with respect to the notation 101 shown in FIG. 1 or the date notation 201 shown in FIG. For the light emitting element group 401 and the notation 102 shown in FIG. 1 or the month notation 202 shown in FIG. 2, the number of characters assigned to the first light emitting element group 401 is less than seven. A second light emitting element group 402 having the assigned LED 307 is arranged in a plane.

  That is, each character of the minute notation 101 or the date notation 201 is displayed by seven LEDs 307 that form the figure eight, and each character of the hour notation 102 or the month notation 202 is a general analog clock. Are displayed by any one of the twelve LEDs 307 arranged corresponding to the positions where the time digits are displayed.

  As a result, since the power consumed to display the time notation 102 or the month notation 202 is only one LED (307), the power consumption can be suppressed, and the power consumption by the displayed characters can be reduced. Variation can be reduced. Therefore, a clear date and time display is possible even with low power consumption, and the battery life can be maintained for a long time.

  As described above, in the digital timepiece according to the present embodiment, only two-digit characters indicating the minute notation 101 or the date notation 201 are displayed by the seven LEDs 307 in character units. That is, in comparison with the conventional digital clock in which seven LEDs 307 are assigned to the two-digit character indicating the time notation 102 or the month notation 202, the digital clock according to this embodiment The area occupied by the LED can be reduced. For this reason, even a small wristwatch can digitally display 4-digit characters, and an increase in manufacturing cost due to the use of a small LED can be avoided.

  It should be noted that the number of LEDs 307 that display each character of the minute notation 101 or the day notation 201 may be any number that can display 0 to 9. Further, the number of LEDs 307 for displaying each notation of the hour notation 102 or the month notation 202 may be smaller than the number of the LEDs 307 for displaying each character of the minute notation 101 or the day notation 201.

  Returning to FIG. 3, the light shielding plate 306 shields the scattering of the light emitted from the LEDs 307 by a portion other than the openings (501, 502) drilled at positions facing the respective LEDs 307.

  FIG. 5 is an explanatory view showing an example of openings (501, 502) drilled through the front and back of the light shielding plate 306. FIG. The openings (501, 502) are perforated at positions facing the LEDs 307 of the first light emitting element group 401 and the second light emitting element group 402 arranged on the FPC board 309. The light shielding plate 306 according to the present embodiment has an opening 501 perforated at a position facing each LED 307 of the first light emitting element group 401, and the opening 501 forms a number 8 character. In addition, the light shielding plate 306 has perforated openings 502 in the shape of time numerals in an analog timepiece at positions facing the LEDs 307 of the second light emitting element group 402.

  One LED 307 is arranged opposite to each opening (501, 502). Thereby, the light emitted from the LED 307 is shielded by the portions other than the openings (501, 502). And the light which passed the opening part (501, 502) permeate | transmits the dial 308, and displays a time notation or a date notation.

  Note that the opening 501 perforated at a position facing the LED 307 of the first light emitting element group 401 constitutes the first opening, and the opening perforated at a position facing the LED 307 of the second light emitting element group 402. The part 502 constitutes a second opening.

  Moreover, the opening part 501 should just be what can identify each character of the notation 101 of the minutes from 0 to 9 or the notation 201 of the day from the shape of a some opening. Moreover, the opening part 502 should just be what can identify the time description 102 or the month description 202 from each opening.

  Further, the surface of the light shielding plate 306 is preferably coated with a resin material having a high light shielding property such as black. The inside of the openings (501, 502) of the light shielding plate 306 is preferably painted with a white paint.

  With the configuration of the digital timepiece 300 according to the first embodiment described above, the date and time shown in FIG. 1 or 2 can be displayed. Specifically, the digital timepiece 300 according to this embodiment guides light emitted from the LED 307 included in the first light emitting element group 401 through the opening 501 with the minute notation 101 or the day notation 201. Digital display is performed, and light emitted from any one of the LEDs 307 included in the second light emitting element group 402 having the time notation 102 or the month notation 202 is guided by the opening 502 and is digitally displayed.

  As described above, in the digital timepiece 300 according to the first embodiment, the number of the LEDs 307 assigned to each notation of the hour notation 102 or the month notation 202 is set to the character unit of the minute notation 101 or the day notation 201. By making the number less than the number of assigned LEDs 307, power consumption can be reduced, and clear date and time display can be achieved with low power consumption. In addition, since there is no variation in the number of LEDs 307 used by the displayed characters, the power consumption does not change greatly depending on the displayed characters, and as a result, the battery life can be maintained for a long time.

  In the digital clock 300 according to the first embodiment, only two-digit characters indicating the minute notation 101 or the day notation 201 are displayed by the seven LEDs 307 in units of characters, and the hour notation 102 or month notation is displayed. Since a two-digit character indicating 202 is displayed by one LED 307, even a small wristwatch can digitally display a four-digit character and avoid an increase in manufacturing cost by using a small LED. Can do.

  Also, the present invention is not limited to the first embodiment described above, and various modifications as exemplified below are possible.

(Modification 1 of the first embodiment)
In the digital timepiece 300 according to the first embodiment described above, the notation 102 shown in FIG. For this reason, the digital clock 300 cannot distinguish between morning and afternoon.

  Therefore, in the present modification, when the afternoon notation 102 is displayed, the cycle of lighting or blinking of the LED 307 arranged at the 12 o'clock position shown in FIG. 4 is always changed. Thereby, in this modification, it is made possible to distinguish between morning and afternoon in the time notation 102. Alternatively, the twelve LEDs 307 included in the second light emitting element group 402 illustrated in FIG. 4 are configured by LEDs capable of emitting multicolor light, and the color of the LED 307 is changed between morning and afternoon in the time notation 102. Thereby, in this modification, it is made possible to distinguish between morning and afternoon.

(Modification 2 of the first embodiment)
In the digital timepiece 300 according to the first embodiment described above, the time notation shown in FIG. 1 and the date notation shown in FIG. 2 are displayed using the same LED 307. It cannot be distinguished at a glance whether it is time notation or date notation.

  Therefore, in this modification, the twelve LEDs 307 included in the second light emitting element group 402 shown in FIG. 4 are configured by LEDs capable of emitting multiple colors, and the color of the LEDs 307 is changed depending on the time notation and date notation. This makes it possible to distinguish the time notation and date notation shown in FIG. 1 or FIG.

(Modification 3 of the first embodiment)
As described in the first and second modifications, the digital timepiece 300 according to the first embodiment described above cannot easily distinguish between morning and afternoon, time notation, and date notation.

  Therefore, in this modification, in addition to the time notation shown in FIG. 1 or the date notation shown in FIG. 2, am, afternoon, or time notation and date notation can be easily made using a display for identifying am, afternoon, or date notation. The case will be described so that it can be identified. Note that a description of the same points as in the first embodiment described above will be omitted.

  FIG. 6 is an explanatory view showing a display example of time notation displayed by the digital clock 300 according to the present modification. The time notation shown in FIG. 6 represents 12:34. As described above, in this modified example, in addition to the minute notation 101 and the hour notation 102, the display 601 for identifying the morning and afternoon, the time notation, and the date notation is displayed below the two-digit character indicating the minute notation 101. To display.

  FIG. 7 is an explanatory view showing an arrangement example of the plurality of LEDs 307 arranged on the FPC board 309. The display 601 is assigned three LEDs 307 identifying morning, afternoon or date notation. That is, the digital timepiece 300 according to the present modification includes a third light emitting element group 701 having three LEDs 307 on the FPC board 209 in addition to the configuration of the first embodiment.

  That is, in the digital timepiece 300 according to this modification, in addition to the configuration of the first embodiment, the display 601 for identifying the morning and afternoon, the time notation, and the date notation is included in the third light emitting element group 701. Are displayed by any one of the LEDs 307.

  FIG. 8 is an explanatory diagram showing an example of an opening that is perforated through the front and back of the light shielding plate 306. The openings (501, 502, 801) are positions facing the LEDs 307 of the first light emitting element group 401, the second light emitting element group 402, and the third light emitting element group 701 disposed on the FPC board 309. Perforated.

  In addition to the configuration of the first embodiment, the light shielding plate 306 according to the present modification has three circular openings 801 perforated at positions facing each LED 307 of the third light emitting element group 701. The shape of the opening included in the opening 801 may be anything that can distinguish between morning and afternoon, time notation, and date notation.

  One LED 307 is disposed in the opening 801 so as to face each other. Thereby, the light emitted from the LED 307 is shielded by a portion other than the opening 801. On the other hand, the light passing through the opening 801 passes through the dial plate 308 and digitally displays a display 601 for identifying morning and afternoon, time notation, and date notation.

(Modification 4 of the first embodiment)
The digital timepiece 300 according to the first embodiment described above cannot easily distinguish between morning and afternoon, as described in the second modification.

  Therefore, in this modified example, the notation 102 shown in FIG. Thereby, the time notation of morning and afternoon can be distinguished easily.

  FIG. 9 is an explanatory diagram showing a display example of time notation displayed by the digital clock 300 according to the present modification. The time notation shown in FIG. 9 represents 12:34. Thus, in this modification, in addition to the structure of 1st Embodiment, the time notation 902 is displayed by 00-23. Thereby, the digital timepiece 300 according to the present modification can easily distinguish whether the time notation 901 is AM or PM.

  FIG. 10 is an explanatory view showing an arrangement example of the plurality of LEDs 307 arranged on the FPC board 309. Twenty-four LEDs 307 are assigned to the time notation 901. In other words, the digital timepiece 300 according to the present modification includes a second light emitting element group 1001 having 24 LEDs 307 on the FPC board 209 in addition to the configuration of the first embodiment.

  That is, in the digital timepiece 300 according to the present modification, each character of the time notation 901 is displayed by any one of the 24 LEDs 307 in addition to the configuration of the first embodiment. Thereby, the digital timepiece 300 according to the present modification can easily identify the morning and afternoon of the time notation 901.

  FIG. 11 is an explanatory view showing an example of an opening that is perforated through the front and back of the light shielding plate 306. The openings (501, 1101) are perforated at positions facing the LEDs 307 of the first light emitting element group 401 and the second light emitting element group 1001 arranged on the FPC board 309.

  In addition to the configuration of the first embodiment, the light shielding plate 306 according to the present modification has an opening having a shape of 00 to 23 indicating the time notation 901 at a position facing each LED 307 of the second light emitting element group 1001. Part 1101 is perforated.

  One LED 307 is arranged in the opening 1101 so as to face each other. Thereby, the light emitted from the LED 307 is shielded by the portion other than the opening 1101. On the other hand, the light passing through the opening 1101 passes through the dial plate 308 and digitally displays the time notation 901.

(Second Embodiment)
In the first embodiment described above, the time notation 102 or the month notation 202 in the time notation or date notation is used, and the light emitted from the LED 307 included in the second light emitting element group 402 is guided through the opening 502. It was decided to shine and display digitally. However, since the opening 502 must be formed by punching the shape of the character indicating the time notation 102 or the month notation 202 in the light shielding plate 306, in the case of a complicated character shape, the opening 502 cannot be drilled. In the digital timepiece according to the second embodiment, characters representing the time notation or the month notation are printed on the back surface of the dial, and the light emitted from the LED is blocked by the characters printed on the dial. This is a digital display of the time or month.

  FIG. 12 is an explanatory view showing a display example of time notation displayed by the digital clock according to the present embodiment. The time notation shown in FIG. 12 represents 1:34. As described above, in this embodiment, in addition to the configuration of the first embodiment, the notation 1201 when displayed as 00 to 12 is opposed to the position where a time numeral is displayed in a general analog clock. Display by any one of the arranged LEDs. The minute notation 101 indicates the first notation, and the hour notation 1201 indicates the second notation.

  The notation displayed by the digital clock according to the present embodiment may be a date notation. The date notation shown in FIG. 13 represents January 31st. Thus, in this embodiment, in addition to the day notation 201 of the first embodiment, the month notation 1301 displayed in 01 to 12 is displayed by one LED. Note that the day notation 201 indicates the first notation, and the month notation 1301 indicates the second notation.

  Furthermore, in the digital timepiece according to the present embodiment, the two-digit character in which each character is displayed by the LED of the seven segments is the last two digits of the second and the year of the year as in the first embodiment. Also good.

  FIG. 14 is a cross-sectional view showing a structure of a digital timepiece 1400 according to the second embodiment. As shown in the figure, the digital timepiece 1400 includes a back cover 301, a battery 302, a rigid board 303, an LED drive circuit 304, a light shielding plate 1401, an LED 307, a dial plate 1402, and an FPC board 309. , A case 310 and a windshield 311. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  A digital timepiece 1400 according to the present embodiment includes a battery 302, an FPC board 309, a rigid board 303, an LED 307, and an LED drive circuit in an outer shape formed by the same structure as that of the first embodiment. It has an internal structure that houses 304, a light shielding plate 1401, and a dial plate 1402.

  Specifically, in the digital timepiece 1400 according to the present embodiment, in addition to the configuration of the first embodiment, each LED 307 arranged on the surface of the FPC board 309 is provided with an opening ( 501 and 1601), and a light shielding plate 1401 is laminated on the FPC board 309. Note that the light shielding plate 1401 may have a configuration in which the LEDs 307 arranged on the FPC board 309 are stacked in the upper layer of the LEDs 307 without being fitted into the openings (501, 1601). At that time, one LED 307 is arranged to face each opening (501, 1401) of the light shielding plate 1401. Further, the digital timepiece 1400 has a structure in which a dial plate 1402 having a time notation 1201 or a month notation 1301 printed on the back surface is laminated on a light shielding plate 1401.

  The dial plate 1402 is a plate-like member on which characters representing a time notation 1201 or a month notation 1301 are printed on the back surface and a time notation or date notation is displayed. The dial 1402 transmits the light emitted from the LED 307 from a portion other than the character indicating the notation 1201 on the back surface or the notation 1301 on the back surface with a predetermined transmittance, and projects the shadow of the character. The notation 1201 or the month notation 1301 is digitally displayed. In addition, the light transmittance of a portion other than the character indicating the notation 1201 or the month notation 1301 on the dial plate 1402 is preferably 30 to 70%.

  FIG. 15 is an explanatory diagram showing an example of printing of characters indicating the notation 1201 or the month notation 1301 when printed on the back surface of the dial plate 1402. A character 1501 indicating a time notation 1201 or a month notation 1301 is printed at a position facing each LED 307 of the second light emitting element group 402 arranged on the FPC board 309. On the back surface of the dial plate 1402 according to the present embodiment, a time notation 1201 or a month notation 1301 in a general analog clock is provided at a position facing each LED 307 of the second light emitting element group 402. The character 1501 is printed.

  Thereby, the light emitted from the LED 307 included in the second light emitting element group 402 is blocked by the character 1501 portion. That is, the digital timepiece 1400 according to the present embodiment digitally displays the time notation 1201 or the month notation 1301 by projecting the shadow of the character 1501 printed on the back surface of the dial 1501. Note that the character 1501 only needs to be able to identify the time notation 1201 or the month notation 1301.

  Returning to FIG. 14, the light shielding plate 1401 shields the scattering of the light emitted from the LEDs 307 by a portion other than the openings (501, 1601) perforated at positions facing the LEDs 307.

  FIG. 16 is an explanatory view showing an example of openings (501, 1601) drilled through the front and back of the light shielding plate 1401. The openings (501, 1601) are perforated at positions facing the LEDs 307 of the first light emitting element group 401 and the second light emitting element group 402 arranged on the FPC board 309. In addition to the configuration of the first embodiment, the light shielding plate 306 according to the present embodiment has a circular opening 1601 perforated at a position facing each LED 307 of the second light emitting element group 402.

  One LED 307 is disposed in each opening 1601 so as to face each other. Thereby, the light emitted from the LED 307 is shielded by a portion other than the opening 1601. On the other hand, the light that has passed through the opening 1601 projects a shadow of a character printed on the back surface of the dial plate 1402 to digitally display the time notation 1201 or the month notation 1301.

  Note that the opening 1601 drilled at a position facing the LED 307 of the second light emitting element group 402 forms a second opening.

  Moreover, the opening part 1601 should just be able to include each character 1501 printed on the back surface of the dial plate 1402 by each opening.

  With the configuration of the digital timepiece 1400 according to the second embodiment described above, the date and time shown in FIG. 12 or 13 can be displayed. Specifically, the digital timepiece 1400 according to the present embodiment opens the light emitted from any one of the LEDs 307 included in the second light emitting element group 402 in addition to the configuration of the first embodiment. The light is guided by the unit 1601, and the shadow of the character 1501 printed on the back surface of the dial plate 1402 is projected to digitally display the time notation 1201 or the month notation 1301.

  (Thus, the digital timepiece 1400 according to the second embodiment has the above-described configuration, so that in addition to the effects of the first embodiment, the shadow of the character 1501 printed on the back surface of the dial 1402 , The time notation 1201 or the month notation 1301 is digitally displayed. Therefore, even if the notation 1201 or the month notation 1301 has a complicated character, the character indicates the time notation 1201 or the month notation 1301. Can be digitally displayed.)

(Third embodiment)
In the digital timepiece according to the third embodiment, a transparent sheet on which a time notation or month notation is printed is laminated between a dial and a light shielding plate. As a result, the digital timepiece according to this embodiment blocks the light emitted from the LED by the character printed on the transparent sheet, and projects the shadow of the character to digitally display the time notation or the month notation. It is. Note that the display examples of the time notation or date notation of the digital clock according to the present embodiment are the same as the display examples shown in FIGS.

  FIG. 17 is a cross-sectional view showing the structure of a digital timepiece 1700 according to the third embodiment. As shown in the figure, the digital timepiece 1700 includes a back cover 301, a battery 302, a rigid board 303, an LED drive circuit 304, a light shielding plate 1401, an LED 307, a transparent sheet 1701, a dial plate 308, and the like. FPC board 303, case 310, and windshield 311 are provided. In the following description, the same components as those in the first embodiment or the second embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  A digital timepiece 1700 according to the present embodiment includes a battery 302, an FPC board 309, a rigid board 303, and an outer shape formed by the same structure as that of the first embodiment and the second embodiment. The LED 307, the LED drive circuit 304, the light shielding plate 1401, the transparent sheet 1701, and the dial plate 308 are housed inside.

  Specifically, in the digital timepiece 1700 according to the present embodiment, in addition to the configuration of the first embodiment or the second embodiment, the time notation 1201 or the month notation 1301 is provided on the light shielding plate 1401. The printed transparent sheet 1701 is laminated. Further, the digital timepiece 1700 has a structure in which a dial plate 308 is laminated on a transparent sheet 1701.

  The transparent sheet 1701 is a transparent member on which characters indicating a time notation 1201 or a month notation 1301 are printed, and a portion other than the characters passes light without being reflected or refracted. When light is emitted from the LED 307, the transparent sheet 1701 according to this embodiment allows light to pass through portions other than the character indicating the time notation 1201 or the month notation 1301, and projects the shadow of the character. The notation 1201 or the month notation 1301 is digitally displayed.

  FIG. 18 is an explanatory diagram showing a print example of characters indicating the notation 1201 or the month notation 1301 when printed on the surface of the transparent sheet 1701. A character 1801 indicating a time notation 1201 or a month notation 1301 is printed at a position facing each LED 307 of the second light emitting element group 402 arranged on the FPC board 309. On the surface of the transparent sheet 1701 according to the present embodiment, a time notation 1201 or a month notation 1301 in a general analog clock is provided at a position facing each LED 307 of the second light emitting element group 402. The character 1801 is printed.

  Thereby, the light emitted from the LED 307 included in the second light emitting element group 402 is blocked by the character 1801 portion. That is, the digital timepiece 1700 according to the present embodiment digitally displays the time notation 1201 or the month notation 1301 by projecting the shadow of the character 1801 printed on the surface of the transparent sheet 1701. The character 1801 only needs to be able to identify the time notation 1201 or the month notation 1301 from each character.

  As described above, the digital timepiece 1700 according to the third embodiment has the above-described configuration, so that in addition to the effects of the first embodiment, the shadow of the character 1801 printed on the surface of the transparent sheet 1701 is displayed. Since the time notation 1201 or the month notation 1301 is digitally displayed by projecting, even if the notation 1201 or the month notation 1301 when there are complex characters, the characters indicate the time notation 1201 or the month notation 1301. Can be digitally displayed.

(Fourth embodiment)
In the first to third embodiments described above, only the characters of the minute notation 101 or the day notation 201 are displayed by the 7-segment LED 307. As a result, the module size is reduced, and the time notation or date notation by the inexpensive LED 307 is made possible even in a small wristwatch such as a ladies' wristwatch. Therefore, in the fourth embodiment, in addition to the configuration of the second embodiment, a normal analog clock is mounted to realize a digital clock that can display time notation and date notation simultaneously at low cost. It is.

  FIG. 19 is an explanatory diagram showing a display example of time notation displayed by the digital clock according to the present embodiment. In the time notation shown in FIG. 19, the digital display and the analog clock represent 1:34. As described above, in this embodiment, in addition to the time notation of the digital timepiece 1400 according to the second embodiment, the time is displayed by an analog timepiece indicating the time by the second hand 1901, the minute hand 1902, and the hour hand 1903.

  Further, the digital clock according to the present embodiment may display the date notation and the time based on the analog clock at the same time. In the date notation and the time by the analog clock shown in FIG. 20, the date notation represents January 31 and the time by the analog clock represents 1:34. As described above, in this embodiment, in addition to the date notation of the digital timepiece 1400 according to the second embodiment, the time is displayed by the analog timepiece indicating the time by the second hand 1901, the minute hand 1902, and the hour hand 1903.

  FIG. 21 is a sectional view showing the structure of a digital timepiece 2100 according to the fourth embodiment. As shown in the figure, the digital timepiece 2100 includes a back cover 301, a battery 302, a rigid board 303, an LED drive circuit 304, a light shielding plate 1401, an LED 307, a dial plate 1402, and an FPC board 309. , A case 310, a windshield 311, a second hand 1901, a minute hand 1902, an hour hand 1903, a movement 2101, a timepiece driving circuit 2102, a crown 2103, a hand movement shaft 2104, and a winding stem 2105. . In the following description, the same components as those in the second embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In addition to the configuration of the second embodiment, the digital timepiece 2100 according to the present embodiment adjusts the time indicated by the second hand 1901, the minute hand 1902, and the hour hand 1903 that are driven by the timepiece driving circuit 2102 on the side surface of the case 310. The crown 2103 is provided, and the case 310, the back cover 301, the windshield 311 and the crown 2103 form the outer shape of the digital timepiece 2100.

  The digital timepiece 2100 includes a second hand 1901, a minute hand 1902, an hour hand, in addition to the configuration of the second embodiment, in the outer shape formed by the case 310, the back cover 301, the windshield 311 and the crown 2103. 1903, a movement 2101, a timepiece driving circuit 2102, a hand movement shaft 2104, and a winding stem 2105 are housed in an internal structure.

  Specifically, in the digital timepiece 2100, in addition to the configuration of the second embodiment, a movement 2101 is provided above the battery 302, and a timepiece driving circuit 2102 is disposed adjacent to the movement 2101. A winding stem 2105 for connecting the crown 2103 and the movement 2101 is provided on the side surface side end face of the movement 2101. Further, the digital timepiece 2100 is provided with a second hand 1901, a minute hand 1902, and an hour hand 1903 operating shaft 2104 at the center of the movement 2101 upward. The needle movement shaft 2104 passes through the FPC board 309, the light shielding plate 1401, and the dial plate 1402 arranged above the movement 2101 and is exposed on the upper surface of the dial plate 1402. An hour hand 1903, a minute hand 1902, and a second hand 1901 are provided in this order from the dial plate 1402 toward the windshield 311 at the tip of the hand movement shaft 2104.

  The timepiece driving circuit 2102 is a circuit that drives the movement 2101 by supplying power from the battery 302 as time progresses with time.

  The movement 2101 rotates the second hand 1901, the minute hand 1902, and the hour hand 1903 by the supply of electric power from the timepiece driving circuit 2102.

  With the configuration of the digital timepiece 2100 according to the fourth embodiment described above, the date and time shown in FIG. 19 or FIG. 20 can be displayed. Specifically, the digital timepiece 2100 according to the present embodiment displays the time using an analog timepiece in addition to the configuration of the second embodiment.

  As described above, in the digital timepiece 2100 according to the fourth embodiment, in addition to the effects of the second embodiment, a normal timepiece and a date notation can be displayed simultaneously by mounting a normal analog timepiece. Can be realized at low cost.

It is explanatory drawing which showed the example of a display of the time notation displayed by the digital timepiece concerning 1st Embodiment. It is explanatory drawing which showed the example of a display of the date notation displayed by the digital timepiece concerning 1st Embodiment. It is sectional drawing which shows the structure of the digital timepiece concerning 1st Embodiment. It is explanatory drawing which showed the example of arrangement | positioning of LED. It is explanatory drawing which showed the example of the opening part pierced by the light-shielding plate. 10 is an explanatory diagram showing a display example of time notation displayed by a digital timepiece according to Modification 3. FIG. It is explanatory drawing which showed the example of arrangement | positioning of LED. It is explanatory drawing which showed the example of the opening part pierced by the light-shielding plate. FIG. 10 is an explanatory diagram showing a display example of time notation displayed by a digital timepiece according to modification example 4; It is explanatory drawing which showed the example of arrangement | positioning of LED. It is explanatory drawing which showed the example of the opening part pierced by the light-shielding plate. It is explanatory drawing which showed the example of a display of the time notation displayed with the digital timepiece concerning 2nd Embodiment. It is explanatory drawing which showed the example of a display of the date notation displayed with the digital timepiece concerning 2nd Embodiment. It is sectional drawing which shows the structure of the digital timepiece concerning 2nd Embodiment. It is explanatory drawing which showed the example of a character printed which shows the description at the time of printing on the back surface of a dial, or the description of a month. It is explanatory drawing which showed the example of the opening part pierced by the light-shielding plate. It is sectional drawing which shows the structure of the digital timepiece concerning 3rd Embodiment. It is explanatory drawing which showed the example of printing of the character which shows the description at the time of printing on the transparent sheet, or the description of a month. It is explanatory drawing which showed the example of a display of the time notation displayed by the digital timepiece concerning 4th Embodiment. It is explanatory drawing which showed the display example of the date notation displayed by the digital timepiece concerning 4th Embodiment, and time. It is sectional drawing which shows the structure of the digital timepiece concerning 4th Embodiment. It is explanatory drawing which showed the example of arrangement | positioning of LED of the conventional digital timepiece. It is explanatory drawing which showed the example of the opening part pierced in the light-shielding plate of the conventional digital timepiece.

Explanation of symbols

300, 1400, 1700, 2100 Digital clock 301 Back cover 302 Battery 303 Rigid substrate 304 LED drive circuit 306, 1401 Light shielding plate 307 LED
308, 1402 Dial 309 FPC board 310 Case 311 Windshield glass 501, 502, 1601 Opening 1701 Transparent sheet 1901 Second hand 1902 Minute hand 1903 Hour hand 2101 Movement 2102 Clock drive circuit 2103 Crown 2104 Hand movement shaft 2105 Winding truth

Claims (9)

A first light emitting element group having a first predetermined number of light emitting elements assigned to a character unit of the first notation in time notation or date notation;
A second light emitting element group having a light emitting element assigned a second predetermined number less than the first predetermined number for a second notation of the time notation or date notation but the first notation;
A drive unit that drives each light emitting element of the first light emitting element group and the second light emitting element group to emit light according to the progress of date or time by power supply;
A power supply unit for supplying power to the drive unit;
A digital clock characterized by comprising:   A shape showing the second notation at a position facing the respective light emitting elements of the second light emitting element group, and a first opening perforated at a position facing each light emitting element of the first light emitting element group A portion other than the first opening is provided for scattering light emitted from each light emitting element of the first light emitting element group and the second light emitting element group. The digital timepiece according to claim 1, further comprising a light shielding member that shields light from a portion other than the second opening. A first opening drilled at a position corresponding to each light emitting element of the first light emitting element group and a second opening drilled at a position facing each light emitting element of the second light emitting element group And scattering of light emitted from each light emitting element of the first light emitting element group and the second light emitting element group, a part other than the first opening part and a part other than the second opening part A light shielding member that shields light by,
The second notation is provided at a position provided above the light shielding member, the first light emitting element group, and the second light emitting element group, and facing each light emitting element of the second light emitting element group. Characters shown are printed on the back surface, and light emitted from each light emitting element of the first light emitting element group and the second light emitting element group from a part other than the part on which the letters are printed has a predetermined transmittance. A plate-like member to be transmitted;
The digital timepiece according to claim 1, further comprising: A pointer that is provided above the plate-like member and is rotationally driven to indicate the character of the second notation;
A drive unit that rotationally drives the pointer over time;
The digital timepiece according to claim 3, further comprising: A first opening drilled at a position facing each light emitting element of the first light emitting element group and a second opening drilled at a position facing each light emitting element of the second light emitting element group And scattering of light emitted from each light emitting element of the first light emitting element group and the second light emitting element group, a part other than the first opening part and a part other than the second opening part A light shielding member that shields light by,
A plate-like member that transmits light emitted from each light emitting element of the first light emitting element group and the second light emitting element group at a predetermined transmittance;
The second light emitting element group is provided below the plate-like member, above the first light emitting element group and the second light emitting element group, and at a position facing each light emitting element of the second light emitting element group. The transparent member which transmits the light emitted from each light emitting element of the first light emitting element group and the second light emitting element group from a portion other than the portion where the character is printed is printed. When,
The digital timepiece according to claim 1, further comprising:   6. The light emitting elements of the first light emitting element group and the second light emitting element group are fitted in the first opening and the second opening, respectively. The digital clock according to any one of the above.   7. The digital timepiece according to claim 1, wherein the first light emitting element group displays each character of the first notation by a light emitting element of 7 segments.   The said 2nd light emitting element group has 12 light emitting elements arrange | positioned on the outer periphery of the said 1st light emitting element group at intervals of 30 degree | times, The Claim 1 characterized by the above-mentioned. Digital clock.   The said 2nd light emitting element group has 24 light emitting elements arrange | positioned on the outer periphery of the said 1st light emitting element group at intervals of 15 degree | times, The Claim 1 characterized by the above-mentioned. Digital clock.

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