• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.1525-1528
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• 2008

High-luminance CNT-FED character-displays using simple line-rib-structure was performed. One display-panel had $48{\times}480$-dots and the sub-pixel pitch was 1mm. Another panel had $32{\times}256$-color-pixels, and the subpixel size was $0.6mm{\times}1.8mm$. The power consumption was less than 10W at character-displaying module. It should be useful for public display even under emergent no-power condition.

• 대한전자공학회논문지
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• 제11권1호
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• pp.23-33
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• 1974

이 논문은 종래의 자자 Display에서 문자의 종류가 많으면, 입력부분이 방대해지고, character generator가 극히 복잡해지는 두가지 문제점을 동시에 해결을 주는 새로운 방식을 제안하였다. 이 방식은 동일한 기량요소가 조합되는 이자에 따라 크기와 위치문희이 자동적으로 가변되어 조합되어 나오는 것으로서, 입력기본요소의 특징 code의 추출로써 조합되는 문우의 form을 예측하고, 그들 form 특징으로써, 기본요소를 control한다. 그 결과, 24기본요소로서 14,364우가 발생되며, 장치가 극히 간단하고, 조합문자의 품질이 양호하다. 이 장처는 종래의 방법으로 했을때와 비교하면 장치가 약 500분 지 1로 적어진다.

• 산업경영시스템학회지
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• 제18권36호
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• pp.71-82
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• 1995

The readability and the visuability are very significant when the letters or figures are displayed as static visual information. Not only is the beauty of the body type character(small letters) important but the display type character(large letters) should also be read easily, quickly and precisely. The issue regarding the readability in terms of perception of information has been raised continuously for all kinds of small signage and billboard, etc., which are written in display type within our everyday life. Among the various kinds of small signage and billboards the car licence plate is well known. Among all the possible factors that would have made an impact on the readability of licence plate, this paper focused on the effects of arrangement of character(letters and figures) and contrast of colors for the readability of licence plate using the within-subject analysis. The statistical analysis results in error reading rate, the character arrangement were significant but the color contrast(green/white, white/green, blue/white, white/blue, black/yellow) was not, No interaction was found.

• 반도체디스플레이기술학회지
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• 제20권3호
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• pp.6-10
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• 2021

Recognition of characters printed or marked on the PCB components from images captured using cameras is an important task in PCB components inspection systems. Previous optical character recognition (OCR) of PCB components typically consists of two stages: character segmentation and classification of each segmented character. However, character segmentation often fails due to corrupted characters, low image contrast, etc. Thus, OCR without character segmentation is desirable and increasingly used via deep neural networks. Typical implementation based on deep neural nets without character segmentation includes convolutional neural network followed by recurrent neural network (RNN). However, one disadvantage of this approach is slow execution due to RNN layers. LPRNet is a segmentation-free character recognition network with excellent accuracy proved in license plate recognition. LPRNet uses a wide convolution instead of RNN, thus enabling fast inference. In this paper, LPRNet was adapted for recognizing characters printed on PCB components with fast execution and high accuracy. Initial training with synthetic images followed by fine-tuning on real text images yielded accurate recognition. This net can be further optimized on Intel CPU using OpenVINO tool kit. The optimized version of the network can be run in real-time faster than even GPU.

• 한국안전학회지
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• 제24권5호
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• pp.92-100
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• 2009

This study evaluated the effects of the syllable number(one, two), font type(gothic, myung), color contrast (black on white, white on black), display type(paper, LCD), age(20s, 60s) and character size(2~80pt) on the Korean characters' legibility. Total twenty subjects from two age groups (20s: n=10, 60s: n=10, five male and five female in each group) participated in the legibility test. A target panel was presented in the distance of 50 cm, and subjects conducted a reading tests for, in total, 16 treatment conditions (full combination of syllable number, font type, color contrast and display type). Results showed that two-syllable words revealed better legibility than one-syllable character. The main effects of the age, display type, font type, color contrast, and character size were statistically significant(p<0.01). Paper showed better legibility than LCD, particularly in the 20s and in the character sizes of less than 9pt. Gothic revealed more correct answers than Myung, particularly in the 60s, paper, and white on black conditions. It is expected that these results can provide basic data for the determination of the Korean characters' minimum legible size standards. For example, the minimum legible size for the Gothic and black on white characters presented in the paper should be 5pt for 20s and 1lpt for 60s if the 75% correct reading(3 correct answers in this study) was applied for the legibility criterion.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1989년도 하계종합학술대회 논문집
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• pp.477-480
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• 1989

In this paper, we introduce the three-dimensional Korean character display by using 2D fonts and character depth. Character segments are designed by the set of vertex at run time. Character depth is applied for 3D visualization. And, the variation of eye-point and distance of object is used for 3D character animation.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2004년도 추계 학술발표대회 논문집
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• pp.96-97
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• 2004

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.829-832
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• 1998

본 연구에서 시각 장애인을 위한 인터넷 웹 브라우저를 개발하였다. 인터넷 웹 브라우저 시스템은 인터넷에 연결된 컴퓨터와 문자 출력을 위한 점자 출력기와 음성 합성기, 그림 이미지의 출력을 위한 촉감 출력기, 인터넷 웹 페이지를 출력하기 위한 점자 프린터로 구성된다. 인터넷의 문자 정보는 점자로 변환하여 점자 출력기로 출력하였고, 전자석(solenoid) 방식의 구동기로 동작하는 촉감장치로 인터넷의 그림 정보를 출력하였다. 본 시스템을 이용하여 시각 장애인은 인터넷 웹 사이트 정보를 접근할 수있다.

• 반도체디스플레이기술학회지
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• 제11권2호
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• pp.27-31
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• 2012

This paper proposes a new method of character segmentation in a grayscale image using the standard deviation. Firstly, the proposed method scans vertically the region of interest in an image in order to calculate a standard deviation for each scan line. Characters' standard deviations are much bigger than the background's. Therefore, it is possible to segment characters vertically using the differentiation of those two types of standard deviations. Secondly, the method scans each vertically segmented image horizontally at this time, and then segments each image similarly. The proposed method is implemented using C language in an embedded Linux system for a high-speed real-time image processing. Experiments were conducted by using credit card images. The results show that the proposed algorithm is quite successful for most credit cards. However, the method fails in some credit cards with strong background patterns.

• 전자공학회논문지D
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• 제35D권9호
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• pp.62-69
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• 1998

액정 공간 광 변조기와 회절효율이 높은 위상 홀로그램 어레이를 이용하는 새로운 방식의 문자 디스플레이 장치를 제안하고, 이를 이용해 다양한 문자 디스플레이를 하는 광학 시스템을 구현하였다. 즉, LC-SLM의 장점인 능동적인 특성과 광 리소그라피 방식으로 제작된 위상 홀로그램 어레이의 높은 효율 및 정확도의 특성을 결합시켜 빠르고 정확한 문자 디스플레이 장치를 구현하였다. 본 논문에서 제안한 문자 디스플레이 장치는 빛을 이용하여 영상을 디스플레이한다는 중요한 의미를 가지며 광 정보처리 및 광통신 분야에서 응용할 수 있다.