1. An electronic component testing device for carrying out a test by applying a voltage while keeping a self-heating electronic component that includes a first external electrode and a second external electrode at a predetermined test temperature higher than ordinary temperature, the device comprising:
a first conduction terminal that is brought into abutment with the first external electrode included in the electronic component;
a temperature sensor provided to the first conduction terminal, for measuring a temperature of the electronic component;
a second conduction terminal that is brought into abutment with the second external electrode included in the electronic component, the second conduction terminal including a heater for heating the electronic component to the test temperature, and having an ability to release a larger amount of heat than the amount of heat generated by self-heating of the electronic component; and
a control unit for feeding back a temperature of the electronic component detected by the temperature sensor to the heater, and controlling the heater so that the temperature of the electronic component is kept at the predetermined test temperature.
2. The electronic component testing device according to claim 1, further comprising:
an auxiliary heater provided near the first conduction terminal to keep heat from escaping from the electronic component through the first conduction terminal.
3. The electronic component testing device according to claim 1,
wherein the first conduction terminal includes a plurality of first conduction terminals,
the individual first conduction terminals are brought into abutment with respective first external electrodes of a plurality of self-heating electronic components arranged in order,
the temperature sensor is provided to at least one of the first conduction terminals in individual abutment with the plurality of electronic components, and
the second conduction terminal is brought into abutment with second external electrodes of the plurality of electronic components.
4. The electronic component testing device according to claim 3,
wherein the individual first conduction terminals are brought into abutment with the respective first external electrodes of the plurality of electronic components and the second conduction terminal is brought into abutment with the second external electrodes to heat the plurality of electronic components to a predetermined test temperature,
the temperature sensor includes a plurality of temperature sensors that detect respective temperatures of the plurality of electronic components, or temperatures of predetermined electronic component groups into which the plurality of electronic components are divided, and
the device is configured to perform a calculation for averaging or extracting a representative value from the temperatures detected by the plurality of temperature sensors, to feed the average value or the representative value back to the heater to control the heater so that the temperatures of the electronic components or electronic component groups are kept at the predetermined test temperature, and when a temperature detected by any of the temperature sensors is abnormal, to exclude an electronic component or an electronic component group from which the abnormal temperature is detected from objects of calculation.
5. The electronic component testing device according to claim 1, the device further comprising:
a cooling unit that cools the second conduction terminal with airflow.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A liquid crystal display device comprising:
first and second substrates;
a liquid crystal layer sandwiched between the first and second substrates;
a first electrode formed on the first substrate; and
a second electrode formed on the second substrate;
wherein at least one projected portion is formed in a pixel area on the first substrate, and
the second electrode has at least one opening in the pixel area,
wherein the at least one projected portion is formed in the first electrode in the pixel area, and is plural in number, and
wherein each of the at least one projection portion is arranged at a position which overlaps with each of the at least one opening.
2. A liquid crystal display device according to claim 1, wherein the at least one opening is formed in the second electrode in the pixel area, and is plural in number an entire periphery of the opening is surrounded by the second electrode.
3. A liquid crystal display device according to claim 1, wherein each of the at least one opening has sides extended in at least two directions.
4. A liquid crystal display device according to claim 3, wherein at least one of the sides of the at least one opening is parallel to a corresponding one of sides of the projected portion.
5. A liquid crystal display device comprising:
first and second substrates;
a liquid crystal layer sandwiched between the first and second substrates;
a first electrode formed on the first substrate; and
a second electrode formed on the second substrate;
wherein at least one projected portion is formed in a pixel area on the first substrate, and
the second electrode has at least one opening in the pixel area,
wherein each of the at least one projection portion is arranged at a position which overlaps with each of the at least one opening, and
wherein the first electrode is a counter electrode, and the second electrode is a pixel electrode.
6. A liquid crystal display device comprising:
first and second substrates;
a liquid crystal layer sandwiched between the first and second substrates;
a first electrode formed on the first substrate; and
a second electrode formed on the second substrate;
wherein at least one projected portion is formed in a pixel area on the first substrate, and
the second electrode has at least one opening in the pixel area,
wherein each of the at least one projection portion is arranged at a position which overlaps with each of the at least one opening, and
wherein each of the at least one projection portion contacts with a portion of the second substrate, the portion being exposed in each of the at least one opening.
7. A liquid crystal display device comprising:
first and second substrates;
a liquid crystal layer sandwiched between the first and second substrates;
a first electrode formed on the first substrate; and
a second electrode formed on the second substrate;
wherein at least one projected portion is formed in a pixel area on the first substrate, and
the second electrode has at least one opening in the pixel area,
wherein each of the at least one projection portion is arranged at a position which overlaps with each of the at least one opening, and
wherein each of the at least one projection portion contacts with an element disposed in each of the at least one opening.