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    • 1. 发明授权
    • Arithmetic processor using signed digit representation of internal
operands
    • 使用内部操作数的符号位表示的算术处理器
    • US5153847A
    • 1992-10-06
    • US599275
    • 1990-10-16
    • Naofumi TakagiTsuguyasu HatsudaToru KakiageTakashi TaniguchiTamotsu Nishiyama
    • Naofumi TakagiTsuguyasu HatsudaToru KakiageTakashi TaniguchiTamotsu Nishiyama
    • G06F7/48G06F7/52G06F7/537G06F7/544
    • G06F7/544G06F7/4824G06F7/523G06F7/5338G06F7/5375
    • This invention discloses an arithmetic processor which represents internal arithmetic operands as signed-digit numbers, each digit of which may have either positive, zero, or negative values and which executes addition of a plurality of numbers each of whose most significant digit is offset with respect to the other numbers. The arithmetic processor includes an adder tree which is so constituted that a pair of said plurality of numbers are added to obtain a partial sum and further pairs of partial sums are successively added to obtain a final sum of all numbers. The arithmetic processor further comprises first means for adding a portion of the two numbers where both digits are present, second means for causing a lower order portion where only one of the numbers has a digit present to directly become part of the sum, third means for retaining or outputting a carry created by the first means, and fourth means for adding the carry created in each add stage of the adder tree to the later add stages of the adder tree to obtain the sum.
    • 本发明公开了一种算术处理器,它将内部算术运算符表示为有符号位数,每个数字的数字可以具有正值,零值或负值,并且执行多个数字的加法,每个数字的最高有效位相对于 到其他数字。 算术处理器包括加法器树,该加法器树被相加以使得一对所述多个数字被相加以获得部分和,并且连续地添加另外的部分和对,以获得所有数字的最终和。 算术处理器还包括第一装置,用于添加两个数字存在的两个数字的一​​部分;第二装置,用于引起较低阶部分,其中只有一个数字存在的数字直接成为总和的一部分;第三装置, 保存或输出由第一装置产生的进位,以及第四装置,用于将加法器树的每个加法阶段中产生的进位加到加法器树的稍后的加法阶段以获得和。
    • 2. 发明授权
    • Arithmetic processor using signed-digit representation of external
operands
    • 算术处理器使用外部操作数的有符号表示法
    • US5206825A
    • 1993-04-27
    • US857644
    • 1992-03-24
    • Naofumi TakagiTsuguyasu HatsudaToru KakiageTakashi TaniguchiTamotsu Nishiyama
    • Naofumi TakagiTsuguyasu HatsudaToru KakiageTakashi TaniguchiTamotsu Nishiyama
    • G06F7/48G06F7/52G06F7/535
    • G06F7/535G06F7/4824G06F7/5375
    • This an arithmetic processor which represents internal arithmetic operands as signed-digit numbers, each digit of which may have either positive, zero, or negative values and which executes addition of a plurality of numbers each of whose most significant digit is offset with respect to the other numbers. The arithmetic processor includes an adder tree which is so constituted that a pair of said plurality of numbers are added to obtain a partial sum and further pairs of partial sums are successively added to obtain a final sum of all numbers. The arithmetic processor further comprises first means for adding a portion of the two numbers where both digits are present, second means for causing a lower order portion where only one of the numbers has a digit present to directly become part of the sum, third means for retaining or outputting a carry created by the first means, and fourth means for adding the carry created in each add stage of the adder tree to the later add stages of the adder tree to obtain the sum.
    • 这是一个算术处理器,它将内部算术操作数表示为有符号位数,每个数字的数字可能具有正值,零值或负值,并且执行多个数字的加法,每个数字的最高有效位相对于 其他数字。 算术处理器包括加法器树,该加法器树被相加以使得一对所述多个数字被相加以获得部分和,并且连续地添加另外的部分和对,以获得所有数字的最终和。 算术处理器还包括第一装置,用于添加两个数字存在的两个数字的一​​部分;第二装置,用于引起较低阶部分,其中只有一个数字存在的数字直接成为总和的一部分;第三装置, 保存或输出由第一装置产生的进位,以及第四装置,用于将加法器树的每个加法阶段中产生的进位加到加法器树的稍后的加法阶段以获得和。
    • 4. 发明授权
    • Arithmetic processor and divider using redundant signed digit
    • 算术处理器和分频器使用冗余有符号数字
    • US4866655A
    • 1989-09-12
    • US74892
    • 1987-07-17
    • Tamotsu NishiyamaShigeo KuninobuNaofumi TakagiTakashi Taniguchi
    • Tamotsu NishiyamaShigeo KuninobuNaofumi TakagiTakashi Taniguchi
    • G06F7/48G06F7/537
    • G06F7/4824G06F7/5375
    • An arithmetic processor is disclosed for performing arithmetic operations utilizing an arithmetic operand represented by a signed digit expression having a plurality of digits which may have a positive, zero or negative value. The processor comprises: first circuitry coupled to receive a signal related to the most significant digit of a signed digit expression number Y having nonnegative (or nonpositive) digits other than the most significant digit, and for providing in response to a control signal, a signal representing the logical negation or inversion of the sign of the most significant digit; second circuitry coupled to receive at least one signal related to digits other than the most significant digit of the number Y, and for providing in response to a control signal, at least one signal representing the logical negation or inversion of those digits; and third circuitry coupled to receive a signal related to the least significant digit of the number Y, and for providing in response to a control signal, a signal representing the least significant digit plus 1 (or minus 1). The first and second circuitry invert the signs of the digits of the number Y, and the third circuitry adds (or subtracts) 1 from the least significant digit. The processor also includes circuitry coupled to receive the signals provided by the first, second and third circuitry and a signal representing a number X, and providing a signal representing the sum or difference of the numbers X and Y depending on the control signal.
    • 公开了一种算术处理器,用于利用由具有多个可能具有正,零或负值的数字的有符号数字表达式表示的算术运算数进行算术运算。 该处理器包括:第一电路,被耦合以接收与具有除最高有效位之外的非负(或非正))数字的有符号数字表达式数Y的最高有效位相关的信号,并且响应于控制信号提供信号 代表最重要数字的符号的逻辑否定或倒置; 第二电路,被耦合以接收与数字Y以外的数字相关的至少一个信号,并且响应于控制信号提供表示这些数字的逻辑否定或反转的至少一个信号; 以及第三电路,被耦合以接收与数字Y的最低有效位相关的信号,并且响应于控制信号提供表示最低有效数字加上1(或1)的信号。 第一和第二电路反转数字Y的数字的符号,并且第三电路从最低有效数字加1(或减1)。 处理器还包括耦合以接收由第一,第二和第三电路提供的信号的电路,以及表示数字X的信号,并根据控制信号提供表示数字X和Y的和或差的信号。
    • 8. 发明授权
    • Backlight unit and liquid crystal display employing the same
    • 背光单元和使用其的液晶显示器
    • US07659949B2
    • 2010-02-09
    • US11718294
    • 2005-10-25
    • Shuji SawadaTakashi Taniguchi
    • Shuji SawadaTakashi Taniguchi
    • G02F1/1333
    • G02B6/0081G02F1/133308G02F1/133615G02F2201/465
    • A backlight unit (2) comprising a shallow box type case (3) having low profile sidewalls and opening upward, a light guide plate (7) in the box type case (3), and a supporting frame (11) containing optical members such as a linear light source (8) and an optical sheet (10) and securing the optical members in place by being fitted in the opening. A first engaging portion (4) is provided on the inside of the sidewall of the box type case (3) and second engaging portions (121-124) are provided on the outer surface of the sidewall of the supporting frame (11) being fitted in the upper opening of the box type case (3). A locking means (14) is attached to the second engaging portion such that the locking means (14) engages with and locks the first engaging portion when the first and second engaging portions engage with each other, thus preventing unfastening of the supporting frame. A liquid crystal display employing the backlight unit is also provided.
    • 一种背光单元(2),包括具有低剖面侧壁并向上开口的浅盒型壳体(3),盒型壳体(3)中的导光板(7)和包含光学构件的支撑框架 作为线性光源(8)和光学片(10),并且通过装配在开口中将光学构件固定就位。 第一接合部分(4)设置在盒式壳体(3)的侧壁的内侧,并且第二接合部分(121-124)设置在支撑框架(11)的侧壁的外表面上, 在盒式箱体(3)的上部开口处。 锁定装置(14)附接到第二接合部分,使得当第一和第二接合部分彼此接合时,锁定装置(14)与第一接合部分接合并锁定,从而防止支撑框架的松开。 还提供了采用背光单元的液晶显示器。