Abstract: A comfort-analyzing device includes a display unit, a first control unit, an input unit, and a cognitive-structure constructing unit. The display unit is configured to present a questionnaire for extracting both a comfort level of a user in an environment and at least one environmental factor to determine the comfort level. The first control unit is configured to cause the display unit to present the questionnaire twice or more during a survey period. The input unit is configured to accept, from the user, input of each reply to the questionnaire presented twice or more. The cognitive-structure constructing unit is configured to construct a cognitive-structure model representing a cognitive structure of the user regarding comfort by extracting both the comfort level and the at least one environmental factor in chronological order based on each reply to the questionnaire presented twice or more.

Abstract: The voltage transmission circuit includes: a multiplexer for transmitting positive and negative voltages ranging +VDD to ?VDD selectively; and a demultiplexer for receiving the positive and negative voltages and output them at positive and negative outputs. The voltage transmission circuit is arranged by use of elements each having a withstand voltage of which the absolute value is not 2|VDD|, but |VDD|. While transmitting positive voltages, the multiplexer is configured not to be applied by negative voltages, the multiplexer and demultiplexer are controlled by signals each having a potential of 0 V to +VDD, and the demultiplexer outputs the positive voltages at the positive output. While transmitting negative voltages, the multiplexer is configured not to be applied by positive voltages, the multiplexer and the demultiplexer are controlled by signals each having a potential of ?VDD to 0 V, and the demultiplexer outputs the negative voltages at the negative output.

Abstract: The display device includes display drivers including first and second ones operable to output, based on display data, gradation signals to source lines of display panel regions. The display device is arranged to be able to suppress the variation in output voltage between display drivers while minimizing the increases in chip area of the display drivers and in wiring area of a display panel and keeping high noise resistance. Each display driver can generate gray scale reference voltages for producing gradation signals corresponding to display data. The first display driver can sequentially transmit gray scale reference voltages generated by itself to the second display driver. Based on the transmitted gray scale reference voltages, the second display driver makes the first display driver execute calibration for decreasing the absolute value of difference between gray scale reference voltages generated by the first and second display drivers, or executes the calibration by itself.

Abstract: The voltage transmission circuit includes: a multiplexer for transmitting positive and negative voltages ranging +VDD to ?VDD selectively; and a demultiplexer for receiving the positive and negative voltages and output them at positive and negative outputs. The voltage transmission circuit is arranged by use of elements each having a withstand voltage of which the absolute value is not 2|VDD|, but |VDD|. While transmitting positive voltages, the multiplexer is configured not to be applied by negative voltages, the multiplexer and demultiplexer are controlled by signals each having a potential of 0 V to +VDD, and the demultiplexer outputs the positive voltages at the positive output. While transmitting negative voltages, the multiplexer is configured not to be applied by positive voltages, the multiplexer and the demultiplexer are controlled by signals each having a potential of ?VDD to 0 V, and the demultiplexer outputs the negative voltages at the negative output.

Abstract: The display device includes display drivers including first and second ones operable to output, based on display data, gradation signals to source lines of display panel regions. The display device is arranged to be able to suppress the variation in output voltage between display drivers while minimizing the increases in chip area of the display drivers and in wiring area of a display panel and keeping high noise resistance. Each display driver can generate gray scale reference voltages for producing gradation signals corresponding to display data. The first display driver can sequentially transmit gray scale reference voltages generated by itself to the second display driver. Based on the transmitted gray scale reference voltages, the second display driver makes the first display driver execute calibration for decreasing the absolute value of difference between gray scale reference voltages generated by the first and second display drivers, or executes the calibration by itself.