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1. 发明专利

JPH10173475A PIEZOELECTRIC OSCILLATOR 失效
公开(公告)号：JPH10173475A
公开(公告)日：1998-06-26
申请号：JP32635496
申请日：1996-12-06
申请人： NEC CORP , TOYO COMMUNICATION EQUIP
发明人： FUKIHARU EIICHI , TANAKA YOSHIAKI
IPC分类号： H03H9/02 , H03H9/10 , H03H9/19
摘要： PROBLEM TO BE SOLVED: To provide a piezoelectric oscillator such as a surface mount crystal oscillator capable of easily miniaturizing at low cost by using a package having a simple structure and highly generalized parts. SOLUTION: A 1st and a 2nd chip capacitors 12 and 13 are disposed on the inner bottom 3 of an airtight container 2 for surface mounting. Between the external terminal of the airtight container 2 and the terminals of the 1st and the 2nd chip capacitors 12 and 13 is connected via a continuity pattern 8, and a crystal element 14 is placed in a cantilever girder form at one of the 1st and the 2nd chip capacitors 12 and 13. Chip coils, chip resistors or chip thermistors may be used in place of the 1st and the 2nd chip capacitors 12 and 13.

2. 发明专利

JPH10322129A CHIP COMPONENT COMPOUND PIEZOELECTRIC DEVICE 失效
公开(公告)号：JPH10322129A
公开(公告)日：1998-12-04
申请号：JP12724297
申请日：1997-05-16
申请人： NEC CORP , TOYO COMMUNICATION EQUIP
发明人： FUKIHARU EIICHI , YASUIKE RYOICHI , MORIYAMA NORIYUKI
IPC分类号： H03H9/10 , H03B5/32 , H03H9/17
摘要： PROBLEM TO BE SOLVED: To provide a piezoelectric device suitable for a radio equipment manufacturer to constitute an oscillator or a filter according to its own desire. SOLUTION: A recessed part 2 is provided on the outside bottom face of a package main body 1. Two facing electrodes 3 and 4 arranged so as to be faced with a prescribed interval are formed on the ceiling face of the recessed part 2. Package electrode terminals H1, H2, Tc, and GND are exposed at four corners on the outside bottom face of the package main body 1. The facing electrodes 3 and 4 are respectively connected with the package electrode terminals H1 or H2 through a conductive pattern put through the package 1. Two chip-type capacitors C1 and C2 are mounted between the faced electrodes 3 and 4. An At-cut crystal oscillator X is fixed in a cantilever supported state inside the package main body 1. One cantilever-supported end part of the crystal oscillator X is connected through the conductive pattern with the package electrode terminal H2.

3. 发明专利

JP2001021883A REFLECTIVE LIQUID CRYSTAL DISPLAY DEVICE AND ELECTRONIC EQUIPMENT 失效
公开(公告)号：JP2001021883A
公开(公告)日：2001-01-26
申请号：JP19135699
申请日：1999-07-06
申请人： NEC CORP
发明人： FUKIHARU EIICHI
IPC分类号： G09F9/00 , G02B5/10 , G02F1/1335 , G02F1/13357
摘要： PROBLEM TO BE SOLVED: To provide a reflective liquid crystal display device and an electronic equipment by which thin shapes and light weight are realized. SOLUTION: The reflective liquid crystal display device is provided with a polarizing plate 3, a phase difference plate 4, a diffusion plate 5, a color filter 6, a transparent electrode 7, a liquid crystal layer 8 and a reflection electrode 9 between the two glass substrates 1, 2 placed opposite to each other. The glass substrate 1 closer to an observer is provided with projecting and recessing parts to function as a light transmission plate for a frontlight on the observer's side surface. The frontlight comprises the glass substrate 1 and a light source 10 arranged on a side face of the glass substrate 1.

4. 发明专利

JPH08139558A SURFACE ACOUSTIC WAVE DEVICE 失效
公开(公告)号：JPH08139558A
公开(公告)日：1996-05-31
申请号：JP30271994
申请日：1994-11-14
申请人： NEC CORP
发明人： FUKIHARU EIICHI
IPC分类号： H03H9/145
摘要： PURPOSE: To finely adjust the impedance of a surface acoustic wave device with precision without using external components. CONSTITUTION: This surface acoustic wave device having inter-digital electrodes 2 and 3 formed on a piezoelectric substrate 1 is provided with 11 auxiliary patterns 4 and 5 formed of conductive films nearby the inter-digital electrodes 2 and 3, and the auxiliary patterns 4 and 5 can be connected to the inter-digital electrodes 2 and 3 selectively and electrically. Consequently, the electrostatic capacitance of the auxiliary patterns 4 and 5 is selectively added to the terminals of the inter-digital electrodes 2 and 3, whose impedance adjustments can finely be made.

5. 发明专利

JPH11145728A PIEZOELECTRIC VIBRATOR OSCILLATOR 失效
公开(公告)号：JPH11145728A
公开(公告)日：1999-05-28
申请号：JP31905297
申请日：1997-11-04
申请人： NEC CORP
发明人： FUKIHARU EIICHI
IPC分类号： H03H9/02 , H03B5/32 , H03H9/10 , H03H9/17
摘要： PROBLEM TO BE SOLVED: To simplify and miniaturize a structure, to reduce cost, and to improve the reliability of a sealed container respectively. SOLUTION: A metallic bump 34 is prepared between the first and second input/output electrodes 22 and 24 and also first and second auxiliary electrodes 26 and 28 of a crystal element plate 6 and between the 1st and 2nd input/output terminals 23 and 25 and also the 1st and 2nd auxiliary terminals 27 and 29 of an IC chip 8 respectively. The plate 6 is supported and fixed onto the chip 8 via those bumps 34, and at the same time the electrodes 22 and 24 of the plate 6 are electrically connected to the terminals 23 and 25 of the chip 8 respectively. In such a constitution, the structure of a sealed container 4 is simplified and miniaturized together with reduction of its cost. Furthermore, no conductive adhesive is used and accordingly the gas will not generated in the container 4 to eliminate the deterioration of its performance that is caused by the gas attached to the plate 6.

6. 发明专利

JPH08288786A SURFACE ACOUSTIC WAVE DEVICE 失效
公开(公告)号：JPH08288786A
公开(公告)日：1996-11-01
申请号：JP8303995
申请日：1995-04-10
申请人： NEC CORP
发明人： FUKIHARU EIICHI
IPC分类号： H03H9/145 , H03H9/05 , H03H9/25
摘要： PURPOSE: To obtain a surface acoustic wave device having a narrow loading area, compact size and high performance, capable of preventing surface acoustic wave elements from mutually exerting adverse effects through a piezoelectric base and reduced at its manufacturing manhour. CONSTITUTION: In the surface acoustic wave device having plural surface acoustic wave elements, two surface acoustic wave element piezoelectric bases 1, 2 are arranged so that respective surface acoustic wave element patterns are opposed to each other. The two bases 1, 2 are electrically and physically connected through conductive substances 3.

7. 发明专利

JPH08237030A TEMPERATURE COMPENSATION DEVICE FOR CRYSTAL OSCILLATION CIRCUIT 失效
公开(公告)号：JPH08237030A
公开(公告)日：1996-09-13
申请号：JP6496595
申请日：1995-02-28
申请人： NEC CORP
发明人： FUKIHARU EIICHI
IPC分类号： H03B5/32
摘要： PURPOSE: To eliminate the need for a temperature characteristic test after a crystal vibrator is mounted in an oscillation circuit in the temperature compensation device for a digital temperature compensation type crystal oscillation circuit. CONSTITUTION: Plural temperature coefficients and equivalent circuit constants of crystal vibrators are stored in a storage section PROM 3 when the frequency temperature characteristic of a crystal vibrator in use is expressed by a approximated polynomial. The ambient temperature sensed by a temperature sensor 1 is fed to an A/D converter 2 as a voltage, in which the voltage is converted into a digital signal and it is fed to an arithmetic section 6. The arithmetic section 6 gives a voltage signal based on a temperature sensed by the temperature sensor 1 and a temperature coefficient and an equivalent circuit constant stored in the storage section to a transfer function expressed as ΔF(CL)=Δf(T)+ΔfC to calculate a voltage signal for temperature compensation. The voltage signal is converted into an analog signal by a D/A converter 4, it is given to a crystal oscillation circuit 5, in which the temperature is compensated.

8. 发明专利

JPH04138710A SURFACE ACOUSTIC WAVE FILTER 失效
公开(公告)号：JPH04138710A
公开(公告)日：1992-05-13
申请号：JP26133590
申请日：1990-09-28
申请人： NEC CORP
发明人： FUKIHARU EIICHI
IPC分类号： H03H9/145 , H03H9/64
摘要： PURPOSE:To decrease a spurious level and to improve an out-band attenuation by differentiating the weighting of plural thinned electrodes. CONSTITUTION:Three interdigital thinned electrodes 3, 4, 5 are connected to an input terminal 1 and a different weight function is given to each electrode. Two interdigital regular electrodes 6a,6b are connected to an output terminal 2. In this embodiment, the production of a spurious radiation is avoided by differentiating the weight of the thinned electrodes 3,4,5 so that an out-band minimum attenuation is selected to be -30dB at a frequency lower than the center frequency f0 and -33dB at a frequency higher than the center frequency f0. The out-band minimum attenuation in a conventional filter is selected to be only -25dB at a frequency lower than the center frequency f0 and -28dB at a frequency higher than the center frequency f0, and then this embodiment gives a larger out-band minimum attenuation by nearly 5dB.

9. 发明专利

JPH0477104A SURFACE ACOUSTIC WAVE DEVICE 失效
公开(公告)号：JPH0477104A
公开(公告)日：1992-03-11
申请号：JP18864590
申请日：1990-07-17
申请人： NEC CORP
发明人： FUKIHARU EIICHI
IPC分类号： H03H9/145
摘要： PURPOSE:To reduce losses in the passage band of the surface acoustic wave device by covering an uncrossed part with a conductive film in apodise weighting electrodes and electrically short-circuiting the surface. CONSTITUTION:A bus bar 1 is grounded to place opposite to a bus bar 3 connected to an input terminal 2, and electrode fingers 4 extended from each bus bar are intersected each other. All parts where the electrode fingers 4 exist are intersected with the opposing electrode fingers, and the parts with no intersection are covered with the conductive film to be electrically short-circuited in construction.

10. 发明专利

JP2001242440A FRONT LIGHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2001242440A
公开(公告)日：2001-09-07
申请号：JP2000055323
申请日：2000-03-01
申请人： NEC CORP
发明人： FUKIHARU EIICHI
IPC分类号： G02F1/1333 , F21V8/00 , F21Y101/02 , G02F1/13 , G02F1/1335 , G02F1/13357 , G09F9/00 , H04M1/02
摘要： PROBLEM TO BE SOLVED: To provide a front light unit which can be made thin and has high reliability with respect to foreign matters and to provide a liquid crystal display device which uses this light unit. SOLUTION: The liquid crystal display device 500 is equipped with a liquid crystal panel 501 and a front light unit 100 which has a light guide plate 101, a light source 105 to emit light to the light guide plate, and a front cover 102 disposed to face the light guide plate 101 and which has a tightly sealed structure, between the light guide plate 101 and the front cover 102 by adhering the peripheries of the light guide plate 101 and the front cover 102 with an adhesive 103. The device has a tightly sealed structure between the front light unit 100 and the liquid crystal panel 501, by adhering the peripheries of the light guide plate 101 and the liquid crystal panel 501 with an adhesive 502.

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