★★★ ＜第22回知的財産翻訳検定試験【第12回和文英訳】＞ ★★★
≪１級課題-電気・電子工学-≫【問１】What is claimed is:1.
A light sensor comprising:a light emitting portion emitting pulsed light externallyin response to a pulse signal;a light receiving portion generating a photocurrent
corresponding to the intensity of external incident light;
a current-voltage conversion circuit converting thephotocurrent to a voltage signal;a high-pass filter extracting an alternating-current
component having a predetermined frequency or more from thevoltage signal and outputting it as a filter output showing asignal waveform centered around a reference voltage;a polarity inversion amplifier switching between a normal
amplification state and an inversion amplification state in
response to the pulse signal, and in the normal amplification
state, outputting the filter output without inversion, and in
the inversion amplification state, inverting the filter output
about the reference voltage and outputting it; andan integrator integrating the output from the polarity
inversion amplifier with respect to the reference voltage.
2.
The light sensor according to claim 1,
further comprising a delay circuit delaying the pulse
signal and outputting it to the polarity inversion amplifier.

【問２】Game systems that generate an image seen from a given
observation point in an object space serving as a virtual
three-dimensional space are known. Such game systems are
popular because they allow a user to experience so-calledvirtual reality. For example, in a roleplaying game, a player
operates a character (an object) to move on a map in the object
space. The player enjoys the game by allowing the characterto fight against enemy characters, to talk to other characters,
or to visit various towns.
In such game systems, an object that represents acharacter is usually configured by a plurality of polygons. The
object configured by polygons is arranged in the object space.
By performing so-called geometry processing, an image seen froman imaginary camera is generated. Due to this, game images withno contradiction can be generated even when the object is seenfrom various directions by the imaginary camera.
Game images generated in this way, however, have aproblem that they cannot sufficiently appeal to the emotion ofa player, although they are correct images in a mathematicalsense. For example, when a character that appears in ananimation or a cartoon is represented by an object, shading
applied to the object using Gouraud shading or the like may
provide a real image. On the other hand, this generates an image
with an atmosphere that is different from one familiar to theviewers of animations or cartoons.
【問３】
As shown in FIG. 4, if the human-detection sensor 25,
which is installed on the outdoor side of the entrance door
together with the illumination apparatus 20, senses a human body
30, the illumination lamp of the illumination apparatus 20 turns
on first.
If the illumination lamp of the illumination
apparatus 20 turns on, the current flowing through theillumination apparatus 20 is detected by the current detection
circuit 14 (FiG. 3).
The control unit 200 uses a current detection signal
output from this current detection circuit 14 as a trigger tocause the illumination lamp of the illumination apparatus 10
to turn on after a certain turn-on time interval elapses after
the illumination light of the illumination apparatus 20 turns

on, based on setup condition information set in advance, forexample. Due to this, when the human body 30 is a prowler, forexample, use of this illumination system 100 may cause theprowler to think that a resident is at home, allowing the system
to serve for security or the like.
The controller 15 controls the LED circuit 17, forexample, in response to the current detection signal from thecurrent detection circuit 14 to turn on the LED, thereby
informing the lighting condition of the illumination lamp of
the illumination apparatus 20. In addition, it sets the switch
member 19 to an ON state, after a preset turn-on time interval
t1 elapses after the turn-on of the illumination lamp of theillumination apparatus 20. When the switch member 19 is set
to the ON state, a current flows in the electrical wiring of
the illumination apparatus 10, causing the illumination lampof the illumination apparatus 10 to be in a lit state.